du pqnt-newport administrative record …7 du pqnt-newport administrative record file index of...

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DU PQNT-NEWPORTADMINISTRATIVE RECORD FILE

INDEX OF DOCUMENTS

I. SITE IDENTIFICATION

1. Letter to Mr. Robert J. Touhey, Delaware Department ofNatural Resources and Environmental Control (DNREC),from Mr. Peter E. Kress, E.I. du Pont de Nemours &Company, Inc., re: Response to December 10, 1979request to run radioactivity gamma scans and gross betacounts on monitoring and production well water, 4/9/80.P. 100001-100002. Sample results from an EPA/DNRECsurvey conducted in February are attached.

2. Memorandum to Mr. David Langford, U.S. EPA, from Mr.William M. Thomas, Jr., U.S. EPA, re: Newport pigmentspotential hazardous waste site radiological analyticalresults, 4/28/80. P. 100003-100006. A letterregarding the gross alpha and beta analyses samples anda sample location map are attached.

3. State of Delaware Ground Water Withdrawals for WaterYear 1979 for Du Pont-Newport, City of Newport andAWC-Wilmington Airport, 5/28/80. P. 100007-100007.

4. Letter to Ms. Ruthanne Gordon, U.S. EPA, from Mr. M.Barszcz [sic], E.I. du Pont de Nemours & Company, Inc.,re: Newport former waste disposal operations, 7/22/80.P. 100008-100013. A site map is attached.

5. Report: Evaluation of Existing Conditions at theNewport Plant - North Disposal Site for E.I, du Pont deNemours & Company. Inc., prepared by Woodward-ClydeConsultants, 3/19/87. P. 100014-100185.

Administrative Record File available 2/16/90, updated12/31/91, 11/6/92, 11/13/92, 12/17/92, 1/11/93,8/30/93, 8/21/95, 9/18/97, 3/16/98, 10/9/00 and5/23/01.

Note: Company or organizational affiliation isidentified in the index only when it appears in thefile.

6. Letter to Mr. Chris Corbett, U.S. EPA, from Mr. John M.Lynn, E.I. du Pont de Nemours & Company, Inc., re:Transmittal of a Request for Proposal for aHydrogeological Investigation, 5/12/87. P. 100186-100210. The Request for Proposal is attached.

7. Abbreviated Tables of Constants, Table 1: ThoriumSeries, Table 2: Actinium Series, Table 3: UraniumSeries (undated). P. 100211-100212.

8. Major Water Utility Service Areas Map, (undated).P. 100213-100215. Well-drilling tables for WilmingtonAirport, Wilmington Manor Gardens, and Newport areattached.

9. Handwritten notes, re: Samples taken from NewportWater Supply (undated). P. 100216-100219.

10. Letter to Mr. P. Williams, DNREC, from Mr. W.J.McClure, E.I. du Pont de Nemours Company, Inc., re:Monitoring wells at the site, 2/5/75. P. .100220-100225. A hand-drawn site map and four water analysisreports are attached.

11. Letter to Mr. P. Williams, DNREC, from Mr. W.J.McClure, E.I. du Pont de Nemours & Company, Inc., re:Additional information on bore locations at the site,2/14/75. P. 100226-100229. A hand-drawn site map andtwo engineering computation sheets are attached.

12. Letter to Mr. Jerry Schwartz, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Proposed ground water monitoring plan, 6/4/75.P. 100230-100231.

13. Letter to Mr. Michael A. Apgar, DNREC, from W.J.McClure, E.I. du Pont de Nemours & Company, Inc., re:Submittal of monitoring plan proposal, 6/11/75.P. 100232-100236. A hand-drawn site map is attached.

14. Report: The Relation of Solid Waste Disposal to WaterQuality, prepared by the New Castle County AreawideWaste Treatment Management Program, 8/1/75. P. 100237-100242.

15. Report: Du Pont-Pigments Department, Newport,Delaware, Landfill-Ground Water Investigation, (noauthor cited), 2/13/76. P. 100243-100256.

16. Letter to Mr. Michael Apgar, DNREC, from Mr. R.Z.Fortney, E.I. du Pont de Nemours & Company, Inc., re:A ground water conditions report, 2/17/76. P. 100257-100257.

17. Letter to Mr. Charles R. Sherman, E.I. du Pont deNemours & Company, Inc., from Mr, Michael A. Apgar,DNREC, re: Comments on submitted report concerningground water conditions at the site, 2/27/76.P. 100258-100260.

18. Letter to Mr. Michael A. Apgar, DNREC, from R.Z.Fortney, E.I. du Pont de Nemours & Company, Inc., re:Work performed for the monitoring program at the DuPont-Newport Plant abandoned landfill, 5/26/76.P. 100261-100271. The following are attached:

a) a property map;

b) four boring logs;

c) a Certificate of Analysis for river samples;

d) a table of Newport ground water observationwells;

e) two Certificates of Analysis for wellsamples.

19. Letter to Mr. A.C. Barlow, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Monitoring of ground water levels and quality,11/29/76. P. 100272-100273.

20. Memorandum to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. A.C. Barlow, E.I. du Pont deNemours & Company, Inc., re: Ground water conditionsas required by the state, 12/12/77. P. 100274-100279.A Ground Water Conditions report for the NewportLandfill, a table of ground water elevations asreferred to sea levels, and two site maps are attached.

21. Letter to Mr. Ronald N. Stoufer, DNREC, from R.Z.Fortney, E.I. du Pont de Nemours & Company, Inc., re:Monitoring well report, 7/17/79. P. 100280-100288.The following are attached:

a) information on ground water conditions atNewport Landfill;

b) three tables of sampling results;

c) a table of iron results;

d) three site maps.

22. Preliminary Survey of Newport Pigments Plant, preparedby Mr. Kenneth R. Weiss, 11/29/79. P. 100289-100290.

23. Letter to Mr. Peter E. Kress, E.I. du Pont de Nemours &Company, Inc., from Mr, Robert J. Touhey, DNREC, re:Ground water monitoring program requirements, 12/10/79.P. 100291-100296. A memorandum dated November 7, 1979regarding the ground water monitoring report and twosite maps are attached.

24. Site identification summary, 12/11/79. P. 100297-100297.

25. Telephone conversation record of Mr. Tony Bartolomeoand Ms. Ruthanne Gordon, U.S. EPA, with Mr. CarlEverett, E.I. du Pont de Nemours & Company, Inc., re:Proposed remedial action, 1980. P. 100298-100298.

26. U.S. EPA Potential Hazardous Waste Site Identificationand Preliminary Assessment, Newport Pigments Plant,1/30/80. P. 100299-100302.

27. Handwritten notes, re: Newport Pigments Plant samplingresults, 2/13/80. P. 100303-100304.

28. Handwritten Summary of Analytical Results of NewportPigment Samples, 2/24/80. P. 100305-100310.

29. U.S. EPA Analysis Request and Result form for samplenumbers C0006 to C0011, 2/27/80. P. 100311-100316.

30. U.S. EPA Organics Traffic Report for sample numberC0006, 2/27/80. P. 100317-100322. Three data sheetsand two quality control reports are attached.






36. Letter to Mr. Robert J. Touhey, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Usage of production well WW13 for process and coolingwater, 2/29/80. P. 100353-100354.

37. Memorandum to Mr. Jeffrey Mass, U.S. EPA, from Mr.William M. Thomas, Jr., U.S. EPA, re: Hazardous wastesite inspection and trip report, 3/11/80. P. 100355-100356.

38. U.S. EPA Site Inspection Report, Newport Pigments,3/21/80. P. 100357-100367. A Landfill Site InspectionReport (Supplemental Report) is attached.

39. Letter to U.S. EPA from Mr. David Blecha, West CoastTechnical Services Inc., re: Reports for samplenumbers C0006 to C0011, 4/3/80. P. 100368-100368.

40. Memorandum to Mr. Kenneth R. Weiss from Ms. Lisa A.Hamilton, re: Results of analysis of sample from DuPont-Newport well DM-3, 4/3/80. P. 100369-1003371.Sampling results are attached.

41. Memorandum to P.F. Sosinski, U.S. EPA, from Mr. DanielK. Donnelly, U.S. EPA, re: Sample results from theenergy dispersive X-ray fluorescence analysis ofNewport Pigment and Tybout's Corner Landfills, 4/3/80.P. 100372-100385. The following are attached:

a) information on Subpart B - MaximumContaminant Levels;

b) analytical results of Test Well Number DM-3;

c) analytical results of Test Well Number DM-5;

d) analytical results of Test Well Number DM-6;

e) analytical results of water from the City ofNewport;

f) a site map;

g) analytical results of the Christiana River -Upstream.

42. Memorandum to Mr. J. Gary Gardner, Mr. Robert L. Alien,Mr. Leonard Mangiaracina, Mr. Jeffrey W. Hass, and Mr.Benjamin A. Lacy, U.S. EPA, from Mr. Jeffery Burke,U.S. EPA, re: Ground water pollution potential,4/8/80. P. 100386-100387.

43. Notice entitled "Region III: Ground Water System of aCoastal Plain Aquifer in Delaware; Request for EPADetermination Regarding Aquifer," Federal Register.4/21/80. P. 100388-100391. An area/aquifer map isattached.

44. Memorandum to Mr. Daniel K. Donnelly, U.S. EPA, fromMr. P.G. Johnson, U.S. EPA, re: RCRA results forNewport Pigments, 5/2/80. P. 100392-100392.

45. Memorandum to Mr. William Thomas, U.S. EPA, from Mr.William Belanger, U.S. EPA, re: Radiological resultsfor Newport Pigments, 5/5/80. P. 100393-100393.

46. Letter to Mr. Wayne Naylor, U.S. EPA, from Mr. Barszcz,E.I. du Pont de Nemours & Company, Inc., re:Confirmation of on-site inspection and sampling,5/12/80. P. 100394-100394.

47. Telephone conversation record of Mr. Tony Bartolomeo,U.S. EPA, with Mr. Kenneth Weiss, DNREC, re: Status ofDNREC actions, 5/16/80. P. 100395-100395.

48. Memorandum to Ms. Ruthanne Gordon, U.S. EPA, from Mr.Paul Laskow, U.S. EPA, re: Assignment of federalenforcement action, 5/16/80. P. 100396-100396.

49. Letter to Mr. Anthony S. Bartolomeo, U.S. EPA, from Mr.William L. Osburn, DNREC, re: Public water systems inDelaware, 5/20/80. P. 100397-100397.

50. Handwritten memorandum to Tony from Ruthanne, U.S. EPA,re: Toxicity testing at Newport Pigments, 6/3/80.P. 100398-100400. A routing and transmittal slip isattached.

51. Memorandum to Mr. Benjamin A. Lacey, U.S. EPA, from Mr.Thomas C. Voltaggio, U.S. EPA, re: Geological surveyrecords of public and private drinking water, 6/3/80.P. 100401-100401.

52. Memorandum to Mr. Jim Miller, Mr. Tony Bartolomeo, andMr. Pat McManus, U.S. EPA, from Ms. Ruthanne Gordon,U.S. EPA, re: Hydrogeological work on and infraredaerial photographs of all three Delaware cases, 6/4/80.P. 100402-100402.

53. Memorandum to Mr. Ron Preston, U.S. EPA, from Mr.Anthony Bartolomeo, U.S. EPA, re: Sampling resultsfrom the Christiana River, 6/10/80. P. 100403-100404.

54. Memorandum to Mr. J. Gary Gardner, Mr. Robert L. Alien,Mr. Thomas C. Voltaggio, and Mr. Jeffrey Hass, U.S.EPA, from R.M. Twitchell, U.S. EPA, re: Coastal plainaquifer in Delaware, 6/10/80. P. 100405-100405.

55. Letter to Mr. Carl Everett, E.I. du Pont de Nemours &Company, Inc., from Ms. Ruthanne Gordon, U.S. EPA, re:Request for information on substances disposed at thelandfill, treatment of waste prior to disposal,construction of the landfill, and length of landfillactivity, 6/11/80. P. 100406-100407.

56. Letter to Mr. Thomas Voltaggio, U.S. EPA, from Mr.Kenneth R. Weiss, DNREC, re: Information requested onwater sampling at facilities, 6/20/80. P. 100408-100408.

57. U.S. EPA Analysis Request and Result form for samplenumber NP-6, 6/26/80. P. 100409-100409.

58. Memorandum to file from Mr. Anthony S. Bartolomeo, U.S.EPA, re: Trip report summary, 6/30/80. P. 100410-100411. A site map is attached.

59. Telephone conversation record of Mr. Tony Bartolomeo,U.S. EPA, with Mr. John Provinski, Artesian Water Co.,re: Artesian Water Co. wells located down gradientfrom the Newport Pigments Landfill, 7/1/80. P. 100412-100412.

60. Memorandum to Mr. Benjamin G. Stonelake, U.S. EPA, fromMr. Paul Laskow, U.S. EPA, re: Re-assignment of theNewport case, 7/8/80. P. 100413-100413.

61. Memorandum to file from Mr. Anthony S. Bartolomeo, U.S.EPA, re: Meeting with Mr. Bagalore Lakshman, ArtesianWater Company, on August 3, 1980 to discuss the NewportPigments Landfill and its effects on any wells in thevicinity operated by Artesian, 7/9/80. P. 100414-100414.

62. Memorandum to Mr. Anthony S. Bartolomeo, U.S. EPA, fromMr. H. Ronald Preston, U.S. EPA, re: Assessment ofpotential effects on aquatic life, 7/9/80. P. 100415-100415.

63. Telephone conversation record of Mr. Tony Bartolomeo,U.S. EPA, with Mr. John Provinski, Artesian WaterCompany, re: Well production, 8/21/80. P. 100416-100416.

64. U.S. EPA Inorganics Analysis Data Sheet for samplenumbers MC0092 to MC0099, MC0078, MC0079, MC8045,MC8044, and MC8043, 8/22/80. P. 100417-100431. Twocopies of Appendix A: Elements and Parameters to beIdentified and Measured, 12/79, are attached.

65. Memorandum to Mr. Abraham Ferdas, U.S. EPA, from Mr.William M. Thomas, U.S. EPA, re: Trip report forresampling, 8/26/80. P. 100432-100433.

66. Memorandum to Mr. Bruce Smith, U.S. EPA, from Mr.Daniel K. Donnelly, U.S. EPA, re: Data reports,9/30/80. P. 100434-100435. A memorandum datedSeptember 29, 1980 regarding purgeable organicssampling results is attached.

67. U.S. EPA Emergency and Remedial Response InformationSystem (ERRIS) Data Collection Report #12, 7/30/82.P. 100436-100439.

68. Report: A Preliminary Assessment of Du Pont-NewportLandfill, prepared by DNREC, 3/84. P. 100440-100477.

69. EPA Potential Hazardous Waste Site Inspection Report,Du Pont-Newport Landfill, 1/24/85. P. 100478-100491.

70. Handwritten Proposed Revised Ground Water MonitoringPlan, 6/27/85. P. 100492-100493. A site map isattached.

71. Report: Site Inspection Using Available Information ofDu Pont-Newport Landfill, prepared by NUS Corporation,10/7/85. P. 100494-100730.

72. Handwritten notes, re: Metals results, (undated).P. 100731-100732.

73. Waste Composition Report for Newport Pigments Plant,(undated). P. 100733-100733.

74. Handwritten analysis of paint, (undated). P. 100734-100734.

75. Cross Reference Sheet for Newport Pigments, (undated).P. 100735-100735.

76. Handwritten Well Records for Du Pont-Newport Pigments,(undated). P. 100736-100736.

77. Newport Pigments Analytical Results, (undated).P. 100737-100737.

78. Handwritten notes, re: Suggested sampling points forNewport Pigments Plant, (undated). P. 100738-100738.

79. Handwritten list of contacts, (undated). P. 100739-100740.

80. Handwritten notes to file, re: Columbian aquifer, wellboring logs, and Artesian Water Co. wells, (undated).P. 100741-100741.

81. Handwritten list of Newport Pigment tasks, (undated).P. 100742-100742.

II. REMEDIAL ENFORCEMENT PLANNING

1. Letter to Mr. Joseph J. Hardman, DNREC, from Mr.Gerardo R. Amador, U.S. EPA, re: EPA's response toDNREC's request regarding the Du Pont-Newport ConsentOrder, 3/21/88. P. 200001-200001.

2. Administrative Order by Consent In the Matter Of:Du Pont-Newport Landfill, 8/12/88. P. 200002-200015.

3. Letter to Mr. James T. Wilburn, Delaware Water and AirResources Commission, from Dr. E.L. Rodowskas, E.I. duPont de Nemours & Company, Inc., re: Submittal ofinformation requested by the Water & Air ResourcesCommission concerning the request made by Du Pont forapproval to continue operation of a landfill, 4/2/68.P. 200016-200017.

4. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. James T. Wilburn, DelawareWater & Air Resources Commission, re: Regulationsgoverning the control of refuse disposal and salvageoperations for landfills, 6/19/68. P. 200018-200024.The guidelines for the approval of dumps or sanitarylandfills are attached.

5. Letter to Mr. James T. Wilburn, Delaware Water and AirResources Commission, from Dr. E.L. Rodowskas, E.I. duPont de Nemours & Company, Inc., re: Resubmittal ofinformation concerning a request to continue operationof a landfill, 6/28/68. P. 200025-200030. The Requestfor Continuation of Landfill and Reclamation Operationis attached.

6. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. Hugh J. Menghi, Delaware Water& Air Resources Commission, re: Approval of Du Font'srequest to continue operation of a landfill, 7/22/68.P. 200031-200032. A memorandum regarding a publichearing to be held for applicants for Water & AirResources Commission Permits is attached.

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7. Letter to Mr. Hugh J. Menghi, Delaware Water & AirResources Commission, from Dr. E.L. Rodowskas, E.I. duPont de Nemours & Company, Inc., re: Informationconcerning the location of a working fence and thecovering of oxidizable materials at the landfill,7/26/68. P. 200033-200036. Two site maps and a formwaiving the right to a public hearing are attached.

8. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. John C. Bryson, Delaware Water& Air Resources Commission, re: Permission granted toDu Pont for the operation of a sanitary landfill,8/9/68. P. 200037-200039. Appendix A, SupportingData, is attached.

9. Letter to Mr. W.B. Jennings, E.I. du Pont de Nemours &Company, Inc., from Mr. P.A. Palmer, E.I. du Pont deNemours & Company, Inc., re: A summary, conclusions,and recommendations made following a study of theproblems associated with the disposal of Crolyn tape,2/10/70. P. 200040-200079. The following areattached:

a) a discussion of the disposal problems ofCrolyn tape, prepared by Mr. P.A. Palmer,dated February 10, 1970;

b) a list of references;

c) a map of the location of Test Borings, DuPont Plant located in Newport;

d) two diagrams of boring log cross-sections;

e) eight Boring Logs;

f) a table of sample results for permeabilityand natural moisture testing;

g) a table of Unified Soil Classifications;

h) a Coefficient of Permeability Chart;

i) a table of boring sample results for boringnumbers BD5 and BD6;

i) two tables of Soil Classification Tests;

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k) handwritten notes regarding C2O2 disposalhistory;

1) a memorandum regarding the quantities ofscrap magnetic tape buried at the NewportPlant Dump, dated December 10, 1969;

m) a memorandum regarding the probability of thegeneration of chromates from scrap Crolynmagnetic tape, dated September 28, 1967;

n) a memorandum regarding problems associatedwith tape contaminated with dioxide, datedMay 31, 1968;

o) a memorandum regarding dumpster volumes,dated May 31, 1968;

p) a letter regarding a recommendation for thedevelopment of alternative means for thedisposal of dispersion/coater scrapmaterials, dated June 11, 1968;

q) a memorandum regarding the disposal of scrapmagnetic tape, dated June 28, 1968;

r) a memorandum regarding procedures to befollowed in the disposal of waste materialsand housekeeping standards to be met, datedJune 13, 1988;

s) two cross-section diagrams of log augerborings.

10. Letter to Mr. R.J. Lombardo, E.I. du Pont de Nemours &Company, Inc., from Mr. R.M. Haire, E.I. du Pont deNemours & Company, Inc., re: Results of six soil grabsamples analyzed for heavy metals, 9/4/70. P. 200080-200082. The sampling results are attached.

11. Letter to Mr. R.J. Lombardo, E.I. du Pont de Nemours &Company, Inc., from Mr. R.M. Haire, E.I. du Pont deNemours & Company, Inc., re: Water and air pollutionat the site, 11/10/70. P. 200083-200085.

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12. Letter to Mr. R.M. Salemi, E.I. du Pont de Nemours &Company, Inc., from Mr. E. Hale, E.I. du Pont deNemours & Company, Inc., re: Summary of analyticalsampling activities that show the site is not acontamination source of the Christiana River, 11/10/70.P. 200086-200089. The sampling results are attached.

13. Letter to Delaware Department of Highways andTransportation from Mr. C.M. Thayer, E.I. du Pont deNemours & Company, Inc., re: Permission granted to theDepartment of Highways and Transportation to dumpunsuitable materials at the site, 5/17/72. P. 200090-200092, A diagram depicting the proposed disposal areais attached.

14. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. John A. Lucy, DelawareDepartment of Highways and Transportation, re:Transmittal of two diagrams of the disposal site areas,6/15/72. P. 200093-200095. The two diagrams areattached.

15. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. J.R. Weaver, E.I. du Pont deNemours & Company, Inc., re: An agreement between DuPont and the Delaware Department of Highways andTransportation allowing the state to dump material atthe Newport Plant property, 6/20/72. P. 200096-200096.

16. Letter to Mr. John A. Lucey, Delaware Department ofHighways and Transportation, from Ms. Carroll D.Stride, Army Corps of Engineers, re: A permitauthorizing the state to dredge and fill areas alongRoute 141, 9/20/72. P. 200097-200102. A Department ofthe Army Permit and a diagram showing the proposeddisposal areas are attached.

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17. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. J.R. Weaver, E.I. du Pont deNemours & Company, Inc., re: A condition in thedumping agreement between Du Pont and the DelawareState Highway Department which states Du Pont may notconstruct any buildings on the area where material hasbeen disposed, 9/22/72. P. 200103-200113. Thefollowing are attached:

a) a letter regarding authorization for theDelaware State Highway Department to dredgeand fill areas along Route 141, datedSeptember 20, 1972;

b) a Department of the Army Permit to dredge andfill along Route 141;

c) two diagrams of the areas to be dredged andfilled along Route 141;

d) a letter regarding a notice of a publichearing on the Delaware State HighwayDepartment's proposal to dump material on DuPont property, dated July 20, 1972;

e) a Public Notice, dated June 28, 1972;

f) a summary of a December 16, 1974 meeting todiscuss the use of a dike and a basin as awild life preserve.

18. Letter to C.I. Smith, Jr., E.I. du Pont de Nemours &Company, from R.M. Haire, E.I. du Pont de Nemours, re:Questions relating to the solids disposal area south ofChristiana River, 1/10/73. P. 200114-200116.

19. Letter to Mr. Paul Williams, DNREC, from Mr. James A.Hall, E.I. du Pont de Nemours & Company, Inc., re:Application for permits for soil borings, 9/13/74.P. 200117-200117.

20. Letter to Dr. E.L. Rodowskas, E.I. du Pont de Nemours &Company, Inc., from Mr. Pasquale S. Canzano, DNREC, re:Regulations that apply to the Du Pont landfilloperation, 10/7/74. P. 200118-200144. The DelawareSolid Waste Disposal Regulations are attached.

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21. Summary of a December 16, 1974 meeting, re: The use ofa dike and a basin at the site as a wildlife preserve,12/16/74. P. 200145-200145.

22. Letter to Mr. Pasquale S. Canzano, DNREC, from Mr,Jerry Schwartz, E.I. du Pont de Nemours & Company,Inc., re: Abandonment of the Newport Plant landfill,12/27/74. P. 200146-200146.

23. Letter to Mr. P. Williams, DNREC, from Mr. J. Schwartz,E.I. du Pont de Nemours & Company, Inc., re:Monitoring wells at the site, 2/5/75. P. 200147-200153. Two site maps and four water analysis reportsare attached.

24. Letter to Mr. P. Williams, DNREC, from Mr. J. Schwartz,E.I. du Pont de Nemours & Company, Inc., re: Data fromeight bore locations, 2/14/75. P. 200154-200161. Thefollowing are attached:

a) a test borings location map;

b) a monitoring well and test borings locationmap;

c) a table of Soil Classification Tests;

d) a table of Unified Soil Classifications;

e) a Coefficient of Permeability Chart;

f) a table of boring sample results;

g) a cross-section diagram of boring logs.

25. Letter to Mr. Jerry Schwartz, E.I. du Pont de Nemours &Company, Inc., from Mr. T. Lee Go, DNREC, re: Aninspection of the landfill, 4/1/75. P. 200162-200163.A monitoring well and test borings location map isattached.

26. Letter to Mr. J. Schwartz, E.I. du Pont de Nemours &Company, Inc., from Mr. A.C. Barlow, E.I. du Pont deNemours & Company, Inc., re: An investigative programto be submitted to the state to fulfill a request fordata, 6/2/75. P. 200164-200165.

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27. Letter to Mr. Jerry Schwartz, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Summary of a meeting concerning the monitoring plan atthe landfill, 6/4/75. P. 200166-200167.

28. Letter to Mr. Michael A. Apgar, DNREC, from Mr. J.Schwartz, E.I. du Pont de Nemours & Company, Inc., re:Submittal of a monitoring plan proposal, 6/11/75.P. 200168-200172. A monitoring plan proposal outlineis attached.

29. Letter to Mr. Michael A. Apgar, DNREC, from Mr. JerrySchwartz, E.I. du Pont de Nemours & Company, Inc., re:Installation of four monitoring wells, 9/9/75.P. 200173-200173.

30. Letter to Mr. Jim Hall, E.I. du Pont de Nemours &Company, Inc., from Mr. Ronald N. Stoufer, DNREC, re:DNREC's failure to receive a hydrogeologic flowsystemreport, 12/31/75. P. 200174-200174.

31. Letter to Mr. J.A. Hall, E.I. du Pont de Nemours &Company, Inc., from Mr. C.R. Sherman, E.I. du Pont deNemours & Company, Inc., re: The Ground WaterConditions Report for February, 2/13/76. P. 200175-200192. The following are attached:

a) a table of ground water levels;

b) the Ground Water Conditions Report, datedFebruary 13, 1976;

c) two Hydrographs of Monitoring Wells;

d) a map of Landfill Monitoring Wells, GroundWater Levels, dated January 30, 1976;

e) a map of Landfill Monitoring Wells, GroundWater Levels, dated February 2, 1976;

f) a map of Landfill Monitoring Wells, GroundWater Levels, dated February 4, 1976;

g) a table of Ground Water Levels Corrected toSea Level;

h) five Boring Logs;

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i) sampling results for well numbers 11 and 13;

j) sampling results for sample log numbers 34x-lto 34x-4.

32. Letter to Mr. Charles R. Sherman, E.I. du Pont deNemours & Company, Inc., from Mr. Michael A. Apgar,DNREC, re: Comments on the Ground Water ConditionsReport, 2/27/76. P. 200193-200195.

33. Letter to Mr. J.A. Hall, E.I. du Pont de Nemours &Company, Inc., from Mr. Charles R. Sherman, E.I. duPont de Nemours & Company, Inc., re: Information to beused in developing additional ground water data,3/9/76. P. 200196-200197.

34. Letter to Mr. Michael A. Apgar, DNREC, from Mr. JamesA. Hall, E.I. du Pont de Nemours & Company, Inc., re:Proposal for a new monitoring program, 3/11/76.P. 200198-200199.

35. Letter to Mr. James A. Hall, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A, Apgar, DNREC, re:Approval of additions to the monitoring program and arequest to witness the drilling of a new monitoringwell, 3/12/76. P. 200200-200200.

36. Letter to Mr. Michael A. Apgar, DNREC, from Mr. JamesA. Hall, E.I. du Pont de Nemours & Company, Inc., re:Work performed for the monitoring program, 5/26/76.P. 200201-200210. Four Boring Logs and four pages ofsampling results are attached.

37. Letter to Mr. A.C. Barlow, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Extension of deadlines for reports on ground water flowand water quality conditions, 8/30/76. P. 200211-200211.

17

38. Letter to Mr. J.A. Hall, E.I. du Pont de Nemours &Company, Inc., from Mr. A.C. Barlow, E.I. du Pont deNemours & Company, Inc., re: Report on ground waterconditions and an explanation of high levels of zincfound in well DM-3, 10/11/76. P. 200212-200221. Thefollowing are attached:

a) the Ground Water Conditions Report;

b) water quality information;

c) a proposed monitoring program summary;

d) a map of Contours on Top Potomac Formation;

e) a map of Ground Water Contours, PotomacFormation, dated August 17, 1976;

f) a map of Ground Water Contours, Pleistocene,dated August 17, 1976;

g) a sampling results table for SM-1, DM-1, SM-2, DM-2, SM-3, DM-3, SM-4, DM-4, WW-11, andWW-13;

h) two graphs for SM-1 to SM-3, DM-1 to DM-4,WW-11, and WW-13.

39. Letter to Mr. Michael Apgar, DNREC, from Mr. J.A. Hall,E.I. du Pont de Nemours & Company, Inc., re: Requestto abandon and replace monitoring well DM-4, 10/15/76.P. 200222-200222.

40. Letter to Mr. A.C. Barlow, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Agreements stated at a November 18, 1976 meetingconcerning monitoring ground water levels and quality,11/29/76. P. 200223-200224.

41. Letter to Mr. James Hall, E.I. du Pont de Nemours &Company, Inc., from Mr. Ronald N. Stoufer, DNREC, re:A new monitoring well to be drilled in replacement ofwell DM-4, 3/17/77. P. 200225-200225.

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42. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. A.C. Barlow, E.I. du Pont deNemours & Company, Inc., re: The Ground WaterConditions Report, screening differences for wells DM-2and DM-6, and the high level of zinc found in wellDM-3, 12/12/77. P. 200226-200230. The Ground WaterConditions Report, two sampling graphs, and handwrittennotes on wells are attached.

43. Letter to Mr. Pete Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. Ronald N. Stoufer, DNREC, re:Request for reports on monitoring wells constructed inMarch 1977 and water quality and level data, 1/16/78.P. 200231-200231.

44. Letter to Mr. Ronald N. Stoufer, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Transmittal of monitoring well reports and waterquality and level data, 4/27/78. P. 200232-200248.The following are attached:

a) a letter regarding transmittal of a GroundWater Conditions Report, dated December 12,1977;

b) the Ground Water Conditions Report, datedDecember 12, 1977;

c) an elevations and depth table for wellnumbers SM-1 to SM-3, DM-1 to DM-6, WW-11,and WW-13;

d) a map of the Potomac Aquifer, dated August10, 1977;

e) a map of the Pleistocene Aquifer, datedAugust 10, 1977;

f) two Boring Logs;

g) sampling results tables for SM-1 to SM-3,DM-1 to DM-6, WW-11, and WW-13.

45. Letter to Mr. Ronald N. Stoufer, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Two monitoring well reports, 5/5/78. P. 200249-200249.

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46. Letter to Dr. T. Lee Go, DNREC, from Mr. Peter E.Kress, E.I. du Pont de Nemours & Company, Inc., re:Tables of solid and liquid wastes generated by Du Pont,6/27/78. P. 200250-200259. The following areattached:

a) Section 1, Discharge to the Christiana River;b) Section 2, Plant Sewer;c) Section 3, Drying Lagoon;d) Section 4, Abandoned Lagoon;e) Section 5, Schedule I.

47. Letter to Mr. J.D. Lojewski, E.I. du Pont de Nemours &Company, Inc., from Mr. C.F. Wood, E.I. du Pont deNemours & Company, Inc., re: Mineral deposits at thesite and sampling results from wells DM-4 and DM-5,8/28/78. P. 200260-200262. A site backgroundinformation summary is attached.

48. Property Map, Newport Plant, Christiana Hundred, NewCastle County, Delaware, Map 3930, Sheet 1 of 2,prepared by Mann-Talley, Inc., 10/26/78. P. 200263-200264. Property Map Sheet 2 of 2 is attached.

49. Memorandum to Mr. R.M. Salemi, E.I. du Pont de Nemours& Company, Inc., from Mr. K.D. Dastur, E.I. du Pont deNemours & Company, Inc., re: Sampling results fromfour test borings, 12/7/78. P. 200265-200266.

50. Letter to Mr. Peter E. Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. A.C. Barlow, E.I. du Pont deNemours & Company, Inc., re: Results of soil samples,1/30/79. P. 200267-200269. Two Laboratory AnalysisReports for sample numbers T545 to T547 are attached.

51. Letter to Mr. W.J. McClure, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Establishment of a background public water supplyquality data program and a request for Du Pont todesignate a representative to assist in locatingsampling points to be used in the program, 5/18/79.P. 200270-200271. A sampling program schedule isattached.

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52. Letter to Mr. Peter Krass, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Parameters to be analyzed during an inventory of groundwater quality, 6/13/79. P. 200272-200275. AttachmentI: General Water Quality Indicators, Attachment II:Synthetic Organic Chemicals, and Attachment III:Chlorinated Pesticides/Organics, are attached.

53, Letter to Mr. Ronald N. Stoufer, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:The Ground Water Conditions Report for July, 7/17/79.P. 200276-200283. The following are attached:

a) the Ground Water Conditions Report, datedJuly 20, 1979;

b) a map of the Potomac Aquifer, dated May 1,1979;

c) a map of the Pleistocene Aquifer, dated May1, 1979;

d) three tables of sampling results for wellsSM-1, SM-2, and WW-11;

e) results of iron testing.

54. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: The Ground WaterConditions Report for July and information concerningthe high concentrations of zinc and cadmium found inwell DM-3, 7/20/79. P. 200284-200291. The followingare attached:

a) the Ground Water Conditions Report, datedJuly 20, 1979;



d) three tables of sampling results for wellsSM-1, SM-2, and WW-11;

e) results of iron testing.

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55. Letter to Mr. Donald J. Doutt, Delaware Division ofHighways, from Mr. J.R. Draper, E.I. du Pont de Nemours& Company, Inc., re: Decision by Du Pont not to sellproperty in Newport, 7/27/79. P. 200292-200298. Thefollowing are attached:

a) a letter regarding information about land inNewport that the Delaware Division ofHighways wants to purchase from Du Pont,dated June 27, 1979;

b) Attachment 1, metals, cyanide, and TotalOrganic Compounds (TOC) analyses frommonitoring wells DM-4 and DM-5;

c) Attachment 2, contaminant concentrationsdata;

d) a site map.

56. Notes, re: Lithopone, prepared by C.K. Cooper, 8/8/79.P. 200299-200301.

57. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: A preliminary reporton geology and ground water at the site, 9/13/79.P. 200302-200312. The following are attached:

a) the Review of Geology and Groundwater, datedSeptember 13, 1979;

b) Figure 1, Newport Plant Location ofGeohydrologic Cross Section;

c) Figure 2, Newport Plant Geohydrologic CrossSection;

d) Figure 3, Pleistocene Aquifer, dated May 1,1979;

e) Figure 4, Potomac Aquifer, dated May 1, 1979;

f) Figure 5, Water Wells in the Newport Area;

g) Table 1, Wells of Moderate Capacity LocatedWithin 1-Mile Radius from Newport Plant;

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h) selected references.

58. Site photographs, 10/2/79. P. 200313-200315.

59. Letter to Mr. J.L. Deming, E.I. du Pont de Nemours &Company, Inc., from Mr. Peter E. Kress, E.I. du Pont deNemours & Company, Inc., re: Request to determine theleachability, degradability, and radioactivity of itemsincluded on mineral deposit, abandoned landfill, anddrying lagoon lists, 11/6/79. P. 200316-200326. Thefollowing are attached:

a) the abandoned landfill list;b) the mineral deposit list;c} the drying lagoon list;d) a chart of lithopone barium sides;e) a chart of lithopone zinc sides;f) a chart of lithopone;g) notes on lithopone.

60, Letter to Mr. Peter E. Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. Robert J. Touhey, DNREC, re:Request for Du Pont to continue to monitor the groundwater and to implement an investigation of actionsnecessary to remedy ground water contaminationproblems, 12/10/79. P. 200327-200328.

61. Letter to Mr. K.D. Dastur, E.I. du Pont de Nemours &Company, Inc., from Ms. Deborah C. Donovan, E.I. duPont de Nemours & Company, Inc., re: Possible actionsDu Pont should take to determine whether there ismigration of chemicals contained in the landfill nearwater sources, 1/2/80. P. 200329-200330.

62. Letter to Mr. Christine Trmal, E.I. du Pont de Nemours& Company, Inc., from Mr. Peter E. Kress, E.I. du Pontde Nemours & Company, Inc., re: Request forinformation concerning a mineral deposit, 1/4/80.P. 200331-200331.

63. Letter to Mr. W.J. McClure, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:The need for a rigid sampling schedule to establishbackground public water supply quality data and arequest for Du Pont to designate a representative toassist in locating sampling points, 1/3/80. P. 200332-200333. A sampling schedule is attached.

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64. Letter to Mr. Peter E. Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. Kenneth R. Weiss, DNREC, re:An inspection of the Newport landfill conducted by EPAand DNREC to collect ground water samples and to testfor cadmium, and gamma and beta radioactivity, 2/7/80,P. 200334-200335. A meeting attendance sign-in list isattached.

65. Letter to Mr. Robert J. Touhey, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Use of and health hazards associated with productionwell WW13, 2/29/80. P. 200336-200337.

66. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Draft proposal for ageological study, 3/26/80. P. 200338-200338.

67. Letter to Mr. Robert J. Touhey, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Radioactivity gamma scans and gross beta counts run onmonitoring and production well water, 4/9/80.P. 200339-200340. The sampling results are attached.

68. Letter to Mr. Wayne Naylor, U.S. EPA, from Mr. M.Barszcz, E.I. du Pont de Nemours & Company, Inc., re:A breakdown of wastes at the site, 5/12/80. P. 200341-200341.

69. Letter to Ms. Christine Trmal, E.I. du Pont de Nemours& Company, Inc., from Mr. P.E. Kress, E.I. du Pont deNemours & Company, Inc., re: Boring activitiescompleted at the site, 5/19/80. P. 200342-200342.

70. Letter to Mr. M. Barszcz, E.I. du Pont de Nemours &Company, Inc., from Mr. F.B. Bredimus, E.I. du Pont deNemours & Company, Inc., re: Problems with thecondition and location of existing monitoring wells andpossible installation of new wells, 5/30/80.P. 200343-200343.

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71. Letter to Mr. Carl Everett, E.I. du Pont de Nemours &Company, Inc., from Ms. Ruthanne Gordon, U.S. EPA, re:Information provided by Du Pont concerning the use ofthe Newport landfill and a request for furtherinformation, 6/11/80. P. 200344-200358. A memorandumdated May 2, 1980 regarding analysis of sample numbers800225-01 to -06 by flame and furnace atomic absorptionand sampling data for sample identification numbersC0006 to C0010 are attached.

72. Letter to Ms. Christine Trmal, E.I. du Pont de Nemours& Company, Inc., from Mr. Peter E. Kress, E.I. du Pontde Nemours & Company, Inc., re: A request forrecommendations concerning the location of ground watermonitoring wells, 6/13/80. P. 200359-200359.

73. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: The preliminarygeologic assessment of the south bank at the NewportPlant, 6/18/80. P. 200360-200391. The following areattached:

a) the Preliminary Geologic Assessment of SouthBank Property;

b) selected references;

c) Figure 1, Map of Study Area;

d) Figure 2, Geohydrologic Cross-Section A-B;

e) Figure 3, Geohydrologic Cross-Section C-D;

f) photographs of Shelby Tube samples;

g) a letter regarding soil sample testingresults, dated June 17, 1980;

h) Table 1, Summary of Laboratory Test Data;

i} a graph of Attenberg Limits Tests;

j) a table of Unified Soil ClassificationSystems;

k) twelve Boring Logs.

25

74. Letter to Ms. Ruthanne Gordon, U.S. EPA, from Mr. M.Barszcz, E.I. du Pont de Nemours & Company, Inc., re:Samples obtained during an EPA site visit analyzed formetals, radioactivity, and hydrocarbons, 6/23/80.P. 200392-200400. The following are attached:

a) a letter regarding water samples analyzed byemission spectrography for trace elements,dated June 20, 1980;

b) a table of Water Sample Data;

c) water sample analysis results for C.R.numbers 2940, 2942, 2943, 2941, and 2939;

d) a memorandum regarding the results ofsampling for certification number EPA 48222;

e) a report of analysis for Du Pontidentification number DM-2, SM-2, WW-13,DM-4, SM-3, DM-1, DM-3, DM-S, DM-6, SM-1, CD,CU, D-3, D-5, and D-6;

f) an analytical report of sampling results forsample numbers 150-030-106 and 151-063-128 to-132.

75. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Recommendations to beincluded in the preliminary geologic assessment,6/24/80. P. 200401-200401.

76. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Results from groundwater analysis and a recommendation to relocate wellsDM-1 and DM-3, 7/11/80. P. 200402-200402.

77. Letter to Ms. Ruthanne Gordon, U.S. EPA, from Mr. M.Barszcz, E.I. du Pont de Nemours & Company, Inc., re:Information requested by EPA concerning former wastedisposal operations at the Newport Plant, 7/22/80.P. 200403-200408. A site map is attached.

26

78. Memorandum to file from Mr. C.B. Everett, E.I. du Pontde Nemours & Company, Inc., re: Summary of a meetingwith EPA concerning the Newport and Tybout's CornerLandfills, 7/29/80. P. 200409-200410.

79. Letter to Mr. W.J. McClure, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:Follow-up sampling work to be conducted on August 13,1980, 8/5/80. P. 200411-200411.

80. Letter to Mr. F.B. Bredimus, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Re-evaluation of thedesign of the ground water monitoring program, 8/7/80.P. 200412-200413.

81. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: The Ground WaterConditions Report for August, 8/20/80. P. 200414-200421B. The following are attached:

a) the Ground Water Conditions Report, datedAugust 8, 1980;

b) Table 1, Newport Plant - GroundwaterMeasurements (taken August 18, 1980);

c) Figure 1, Pleistocene Aquifer, dated August18, 1980;

d) Figure 2, Potomac Aquifer, dated August 18,1980;

e) Figure 3, Pleistocene Aquifer concentrationsgraph;

f) Figure 4, Potomac Aquifer concentrationsgraph.

82. Letter to Mr. Peter Kress, E.I. du Pont de Nemours &Company, Inc., from Mr. Michael A. Apgar, DNREC, re:A report documenting the results of water sampling forsynthetic organic chemicals, 9/2/80. P. 200422-200422

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83. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:The Ground Water Conditions Report for August, 9/2/80.P. 200423-200434. The following are attached:

a} the Ground Water Conditions Report, datedAugust 20, 1980;

b) Table 1, Newport Plant - GroundwaterMeasurements (taken August 18, 1980);

c) Figure 1, Pleistocene Aquifer, dated August18, 1980;

d} Figure 2, Potomac Aquifer, dated August 18,1980;

e) a Pleistocene Aquifer concentration chart;

f) a Potomac Aquifer concentration chart;

g) sampling results for SM-1 to SM-3, DM-1 toDM-6, WW-13, and WW-11.

84. Letter to Mr. W.J. McClure, E.I. du Pont de Nemours &Company, Inc., from Mr. William L. Osburn, DNREC, re:Results of repeat sampling for chlorinated pesticidesof well DM-3, 10/2/80. P. 200435-200437. A SpecialAnalytical Request form and a sampling results tableare attached.

85. Handwritten letter to Mike from Pete, re: Theabandonment of old and installation of new monitoringwells, 11/3/80. P. 200438-200441. A handwritten notedated November 3, 1980 regarding the drilling of newwells, and handwritten notes dated October 24, 1980regarding the sealing of old and installation of newmonitoring wells are attached.

86. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. P.E.Kress, E.I. du Pont de Nemours & Company, Inc., re:Confirmation of a December 3, 1980 meeting anddeactivation of wells DM-1, DM-3, and DM-4, 11/14/80.P. 200442-200442.

28

87. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Permission granted byDNREC to seal and abandon three monitoring wells,12/2/80. P. 200443-200443.

88. Letter to Mr. Michael Barzcz [sic], E.I. du Pont deNemours & Company, Inc., from Mr. John D. Kinneman,U.S. Nuclear Regulatory Commission, re: A telephoneinquiry concerning closeout of areas used for thedevelopment and manufacture of dispersion modifiedmetals, 1/6/81. P. 200444-200444.

89. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: An update ofactivities on the ground water monitoring program,1/27/81. P. 200445-200449. Three Well AbandonmentReports are attached.

90. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. P.E.Kress, E.I. du Pont de Nemours & Company, Inc., re:A Ground Water Conditions Report, 1/29/81. P. 200450-200451. A ground water monitoring sampling resultstable is attached.

91. Letter to Mr. John D. Kinneman, U.S. Nuclear RegulatoryCommission, from Mr. M. Barszcz, E.I. du Pont deNemours & Company, Inc., re: Information concerningradiological surveys conducted upon closure of the siteand practices used to dispose of waste materials fromthe Newport Plant, 3/18/81. P. 200452-200456.Attachment 1: a letter dated August 5, 1968 regardingradiation detected in drain gutters and arecommendation to remove the radioactive material;Attachment 2: a letter dated August 14, 1968 regardingsafe radiation levels indicated at the drain gutters;and Attachment 3: solid and liquid waste disposalprocedures information are attached.

92. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Concerns with the validity of barium results reportedin the January 29, 1981 ground water report, 4/2/81.P. 200457-200458. Table 1, Analytical Results for anInvestigative Sampling Program at Newport in February1981, is attached.

29

93. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. M.Barszcz, E.I. du Pont de Nemours & Company, Inc., re:Proposed additional changes to the ground watermonitoring plan, 5/13/81. P. 200459-200462. Maps ofthe Pleistocene Aquifer and the Potomac Aquifer areattached.

94. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Well Abandonment Reports for monitoring wells DM-1, DM-3 and DM-4, 5/20/81. P. 200463-200474. The WellAbandonment Reports are attached.

95. U.S. EPA Notification of Hazardous Waste Site, E.I. duPont de Nemours & Company, Inc., Newport PigmentsPlant, 6/8/81. P. 200475-200516. The following areattached:

a) a letter regarding a description of the itemson the Notification of Hazardous Waste Site,dated June 9, 1981;

b) a copy of the U.S. EPA Notification ofHazardous Waste Site;

c) a letter regarding an updated waste disposalsurvey, dated October 29, 1980;

d) a table of past land disposal activities;

e) a table of current land disposal activities;

f) a table of current and past solvent recoveryactivities;

g) a table of past and current drum salvageactivities;

h) a table of past cleaning cloth recoveryactivities;

i) a table of current oil salvage activities;

j) information regarding the contents of andactivities performed at the Newport Landfill;

k) a map of the Potomac Aquifer, dated May 1,1979;

30

1) information regarding the contents of andactivities performed at the Krebs Deposit;

m) information regarding the contents of andactivities performed at the Drying Lagoon atthe Newport Site;

n) information regarding the contents of andactivities performed at the Koppers Landfill;

o) two summaries of the site activities;

p) a handwritten letter regarding a Freedom ofInformation Act (FOIA) request to obtainEPA's sampling results from a June 24, 1980site visit and an explanation of why EPAtested a town well, dated June 26, 1980;

q) a letter regarding a summary of EPA's June24, 1980 site investigation and samplingactivities, dated June 25, 1980;

r) handwritten notes regarding a telephoneconversation about landfill operations, datedJune 5, 1980;

s) a handwritten table of sampling results fromthe Newport Landfill, the Krebs Deposit, theDrying Lagoon, and the Koppers Landfill;

t) a letter regarding transmittal of informationon buried wastes, dated May 27, 1980;

u) a letter regarding a breakdown of wastes atthe site, dated May 12, 1980;

v) a list of the contents in the NewportLandfill;

w) a list of the contents in the MineralDeposit;

x) a list of contents in the Drying Lagoon;

y) a letter regarding a summary of a February21, 1980 EPA site survey, dated February 22,1980;

31

z) a map of the Potomac Aquifer, dated May 1,1979;

aa) a letter regarding transmittal of a summaryof inactive on-plant land disposal sites,dated September 25, 1978;

bb) an Inactive Land Disposal Site Catalog;

cc) information regarding the abandoned NewportLandfill;

dd) a site map showing landfill and welllocations;

ee) a letter regarding chemical wastes disposedof at the site, dated May 8, 1978;

ff) a site history summary, dated September 4,1975;

gg) a letter regarding abandonment of the NewportLandfill, dated December 19, 1974;

hh) an excerpt from the State Sanitary Code, Part38, Solid Waste Disposal.

96. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:The Ground Water Conditions Report, 6/18/81.P. 200517-200518. A ground water monitoring sampletable is attached.

97. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, re:Groundwater Report, 6/24/81. P. 200519-200520.Sampling results are attached.

98. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Installation of twonew monitoring wells, 7/8/81. P. 200521-200524. Amonitoring well design diagram and a letter regardingchanges to the ground water monitoring program, datedFebruary, 25, 1981, are attached.

32

99. Letter to Mr. Peter E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Lisa A. Hamilton, DNREC, re:Comments on Du Font's proposals to change the groundwater monitoring plan, 7/14/81. P. 200525-200527. Alist of general guidelines for construction ofmonitoring wells is attached.

100. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Groundwater Monitoring Plan, 7/17/81. P. 200528-200529. A hand-drawn sketch of ground water monitoringwells is attached.

101. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Soil boring logs and adrawing showing the completion of four new monitoringwells, 10/1/81. P. 200530-200536. Four Boring Logs, aground water monitoring well design diagram, and aground water monitoring well location map are attached.

102. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: The Ground WaterConditions Report for October, 10/9/81. P. 200537-200547. The following are attached:

a) the Ground Water Conditions Report, datedOctober 9, 1981;



d) seven concentration graphs for thePleistocene and Potomac Aquifers.

103. Letter to Mr. James Joyce, Division of Highways, fromMr. Peter E. Kress, E.I. du Pont de Nemours & Company,Inc., re: Installation of a tidal gauge on the northabutment, 10/29/81. P. 200548-200551. A diagram ofthe Old 141 Bridge view from west and a Work Permit andIndependent Contractors' Safety Instructions NewportPlant form are attached.

33

104. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc.,Ground Water Report for the third quarter of 1981,10/29/81. P. 200552-200553. The report is attached.

105. Letter to Mr. P.E. Kress, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: An updated GroundWater Conditions Report, 12/2/81. P. 200554-200559.The following are attached:

a) the Ground Water Conditions Report, datedDecember 2, 1981;



d) a cross-section diagram of monitoring wells.

106. Letter to Ms. Lisa Hamilton, DNREC, from Mr. Peter E.Kress, E.I. du Pont de Nemours & Company, Inc., re:Information on drilling of pilot boreholes, 12/21/81.P. 200560-200566. Four boring logs, Figure 3, GroundWater Monitoring Wells Installed in September 1981Newport Plant, and a map of the Newport Plant groundwater monitoring program's location of four newmonitoring wells for September 1981 are attached.

107. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Groundwater Report summarizing the third quarter of1980 through the second quarter of 1981, 2/8/82.P. 200567-200570. Figure 1, Newport Plant GroundwaterMonitoring Wells, September 1981, and Figure 2, NewportPlant Groundwater Monitoring Program, PleistoceneAquifer, dated May 20, 1981, are attached.

108. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Groundwater Report for the fourth quarter of 1981,2/10/82. P. 200571-200572. The report is attached.

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109. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Groundwater Report, 3/16/82. P. 200573-200574. Atable of ground water monitoring sample results isattached.

110. Letter to Mr. Kenneth R. Weiss, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the second quarter of 1982,9/30/82. P, 200575-200576. A table of ground watermonitoring sample results is attached.

111. Letter to Mr. G.H. Hull, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Evaluation of groundwater level data, 11/23/82. P. 200577-200580. AGround Water Conditions Report, dated November 23,1982, and maps of the Potomac and Pleistocene Aquifers,dated May 1982, are attached.

112. Letter to Mr. William G. Razor, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the third quarter of 1982,2/17/83. P. 200581-200582. A table of ground watermonitoring sample results is attached.

113. Letter to Mr. William G. Razor, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the fourth quarter of 1982,4/11/83. P. 200583-200584. A table of ground watermonitoring sample results is attached.

114. Letter to Mr. William G. Razor, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water quality and hydrological condition,4/26/83. P. 200585-200588. A map of the location ofmonitoring wells, a map of the aquifer, dated May 1982,and a map of the Potomac Aquifer, dated May 1982, areattached.

115. Letter to Mr. William G. Razor, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the first quarter of 1983,6/21/83. P. 200589-200590. A table of ground watermonitoring sample results is attached.

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116. Memorandum to file from Mr. J.C. Chaney, E.I. du Pontde Nemours & Company, Inc. , re: Comments on testborings, 2/1/84. P. 200591-200591.

117. Letter to Mr. G.H. Hull, E.I. du Pont de Nemours &Company, Inc., from Mr. A.D. Egler, E.I. du Pont deNemours & Company, Inc., re: Results of a geotechnicaldrilling program, 2/1/84. P. 200592-200614. A sitemap and 20 Boring Logs are attached.

118. Letter to Mr. William G. Razor, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the second and third quartersof 1983, 2/21/84. P. 200615-200616. A table of groundwater monitoring sample results is attached.

119. Letter to Mr. T.E. Lewis, E.I. du Pont de Nemours &Company, Inc., from Mr. Scott S. Ulrey, E.I. du Pont deNemours & Company, Inc., re: Justification forreductions in the ground water monitoring program,2/22/84. P. 200617-200618. A Request for Funds formis attached.

120. Handwritten letter to Mr. J.C. Chaney, E.I. du Pont deNemours & Company, Inc., from Mr. G.H. Hull, E.I. duPont de Nemours & Company, Inc., re: Summary of testboring activities performed in preparation of the saleof land to CIBA-GEIGY, 2/23/84. P. 200619-200658. Thefollowing are attached:

a) Attachment 1, a letter regarding the resultsof a geotechnical drilling program, datedFebruary 1, 1984;

b) a site map;

c) twenty Boring Logs;

d) Attachment 2, handwritten notes regardingcore sample results tested for E.P. Toxicity;

e) a site map;

f) Attachment 3, a letter regarding a summary ofground water quality data and hydrologicalconditions, dated April 26, 1983;

g) a monitoring well location map;

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h} a map of the Pleistocene Aquifer, dated May1982;

i) a map of the Potomac Aquifer, dated May 1982;

j) Attachment 4, a letter regarding thetransmittal of a ground water report, datedJune 21, 1983;

k) a table of depths and river levelmeasurements;

1} Attachment 5, a table of lead analyses inground water monitoring wells SM-1 and SM-3.

121. Letter to Mr. J.D. Lojewski, E.I. du Pont de Nemours &Company, Inc., from Mr. J.C. Chaney, E.I. du Pont deNemours & Company, Inc., re: Sampling results to beshared with CIBA-GEIGY, 2/27/84. P. 200659-200659.

122. Letter to Mr. R.M. Salemi, E.I. du Pont de Nemours &Company, Inc., from Mr. A.H. Pagano, E.I. du Pont deNemours & Company, Inc., re: Soil sampling results forboring numbers TB-1 and TB-10, 2/28/84. P. 200660-200660.

123. Letter to Mr. G.H. Hull, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: The Ground WaterConditions Report, 2/29/84. P. 200661-200664. TheGround Water Conditions Report, dated July 1982 to June1983, and maps of the Pleistocene and Potomac Aquifers,dated June 27, 1983, are attached.

124. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. GeorgeH. Hull, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the fourth quarter of 1983 andthe first quarter of 1984, 4/10/84. P. 200665-200667.Two tables of ground water monitoring sample resultsare attached.

125. Letter to Mr. S.S. Ulrey, E.I. du Pont de Nemours &Company, Inc., from Mr. D.M. Kafka, E.I. du Pont deNemours & Company, Inc., re: Response to a groundwater survey, 4/13/84. P. 200668-200671. AGroundwater Questionnaire and a table of depths andriver levels measured on September 19, 1983 areattached.

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126. Letter to Mr. Jack Chaney, E.I. du Pont de Nemours &Company, Inc., from Mr. Scott Phillips, DNREC, re:DNREC and U.S. Army Corps of Engineers Study of thePotomac Aquifer, 6/4/84. P. 200672-200674. Atelephone message regarding monitoring well samplingand an envelope are attached.

127. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. PeterE. Kress, re: Ground water report for the secondquarter of 1984, 8/22/84. P. 200675-200677. A tableof ground water monitoring sample results is attached.

128. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the third quarter of 1984,11/21/84. P. 200678-200679. A table of ground watermonitoring sample results is attached.

129. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the fourth quarter of 1984,1/28/85. P. 200680-200681. A table of ground watermonitoring sample results is attached.

130. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the first quarter of 1985,4/3/85. P. 200682-200683. A table of ground watermonitoring sample results is attached.

131. Letter to U.S. EPA, from Mr. S. Scott Ulrey, E.I. duPont de Nemours & Company, Inc., re: FOIA request,4/8/85. P. 200684-200685. A letter regarding therequest is attached.

132. Letter to Mr. Peter Kress, Chambers Works, from Mr.Garth Glenn, NUS Corporation, re: Request forconfirmation of ground water contamination in thevicinity of the Du Pont Newport Landfill, 5/21/85.P. 200686-200686.

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133. Letter to Mr. A.B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. P.E. Kress, E.I. du Pont deNemours & Company, Inc., re: Information on the HollyRun monitoring program, 6/13/85. P. 200687-200693.The following are attached:

a) a monitoring well designations table;

b} Figure 1, a map of current ground watermonitoring program monitoring well locations;

c) a map of the Potomac Aquifer, dated June 22,1983;

d) a map of the Pleistocene Aquifer, dated June27, 1983;

e} two diagrams of geohydrologic cross sections.

134. Letter to Mr. William G. Razor, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Holly Run Proposed Revised Ground Water MonitoringPlan, 6/27/85. P. 200694-200775. The Ground WaterMonitoring Plan is attached.

135. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. PeterE. Kress, re: Ground water report for the secondquarter of 1985, 8/23/85. P. 200776-200777. A tableof ground water monitoring sample results is attached.

136. Letter to Mr. H.G. Foley, E.I. du Pont de Nemours &Company, Inc., from Ms. Christine Trmal, E.I. du Pontde Nemours & Company, Inc., re: Recommendation againstthe reactivation of well WW-13, 9/25/85. P. 200778-200779.

137. Letter to Mrs. Linda N. Shanley, DNREC, from Mr. PeterE. Kress, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the third quarter of 1985,12/18/85. P. 200780-200781. A table of ground watermonitoring sample results is attached.

138. Letter to Mr. Robert J. Blair, Du Pont-Newport PigmentsPlant, from Mr. Stephen R. Wassersug, U.S. EPA, re:3004(u) and 3008(h) request for information, 3/3/86.P. 200782-200784. Definitions of "release" and "solidwaste management unit" are attached.

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139. Letter to Mr. Stephen R. Wassersug, U.S. EPA, from A.B.Palmer, E.I. du Pont de Nemours & Company, Inc., re:Request for extension to information request, 4/1/86.P. 200785-200785.

140. Letter to Ms. Laura Boornazian, U.S. EPA, from A.B.Palmer, E.I. du Pont de Nemours & Company, Inc., re:Response to request for information, 5/19/86.P. 200786-200790. The following are attached:

a) map of the location of geohydrologic crosssection;

b) a diagram of the geohydrologic cross section;

c) a map of ground water flow direction in thePleistocene Aquifer, dated May 1, 1979;

d) a map of ground water flow direction in thePotomac Aquifer, dated May 1, 1979.

142. Letter to Mr. Stephen R. Wassersug, U.S. EPA, from R.J.Mattson, E.I. du Pont de. Nemours & Company, Inc., re:Response to request for information, 5/21/86.P. 200791-200816. The following are attached:

a) a letter regarding a RCRA Permit Application;

b) a letter regarding a hazardous wastemanagement program;

c) a summary of activity, contents,environmental program, and regulatoryinterface related to the North Disposal Site;

d) a summary of activity, contents,environmental program, and regulatoryinterface related to the South Disposal Site;

e) a summary of activity, contents,environmental program, and regulatoryinterface related to the Drying Lagoon;

f) a letter regarding an on-site inspection andsampling collection at the Du Pont NewportPlant by U.S. EPA and DNREC;

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g) a summary of quantity, operating time, andcontents of the Abandoned Landfill - NorthBank of the Christiana River;

h) a summary of mineral deposits at the SouthBank of the Christiana River;

i) a summary of contents at the Drying Lagoon -west end of plant;

j) a letter regarding the landfill on theNewport Pigment Plant Site;

k) a letter regarding waste disposal operationsat Newport;

1) a map illustrating the North and SouthDisposal Sites;

m) a cover page of a report on available siteinspection information;

n) a map of the Du Pont Newport Landfill;

o) a map of the Du Pont Newport Landfill and 100year floodplain;

p) a hand-drawn map of the monitoring wellproposal;

q) a map of the Newport Plant - C&P Department;

r) a hand-drawn map of the proposed pond.

143. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Bruce P. Smith, U.S. EPA, re:104 (e) request for information, 7/21/86. P. 200817-200820. A certified mail receipt is attached.

144. Handwritten memorandum to file from Mr. M. Bass, re:A telephone conversation concerning an extension oftime for Du Pont to respond to the 104 (e) inquiry,7/30/86. P. 200821-200821.

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145. Letter to Mr. Michael Bass, U.S. EPA, from Ms. PamelaMeitner, E.I. du Pont de Nemours & Company, Inc., re:Acknowledgement of receipt of 104 (e) inquiry and arequest for an extension of time to respond, 7/30/86.P. 200822-200822.

146. Letter to Mr. Michael Bass, U.S. EPA, from Ms. PamelaMeitner, E.I. du Pont de Nemours & Company, Inc., re:Response to 104 (e) inquiry, 8/4/86. P. 200823-200823.

147. Letter to Mr. Michael Apgar, DNREC, from Mr. Peter E.Kress, E.I. du Pont de Nemours & Company, Inc., re:Ground water report for the fourth quarter of 1985 andthe first quarter of 1986, 9/12/86. P. 200824-200826.Two tables of ground water monitoring sample resultsare attached.

148. Letter to Mr. Michael Bass, U.S. EPA, from Mr. A.B.Palmer, E.I. du Pont de Nemours & Company, Inc., re:Response to request for information, 9/29/86.P. 200827-200828.

149. Letter to Mr. Russel H. Wyer, U.S. EPA, from Mr. AlanB. Palmer, E.I. du Pont de Nemours & Company, Inc., re:Comments in response to the proposed listing of Du PontNewport on the National Priorities List, 3/19/87.P. 200829-200832.

150. Handwritten Site Inspection Summary, Du Pont NewportLandfill, 3/30/87. P. 200833-200839. A sign-in sheetis attached.

151. Letter to Mr. Christopher J. Corbett, U.S. EPA, fromMr. A.B. Palmer, E.I. du Pont de Nemours & Company,Inc., re: Information on Woodward-Clyde personnel,4/13/87. P. 200840-200858. A letter regardingWoodward-Clyde resumes are attached.

152. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Stanley Laskowski, U.S. EPA,re: 104 (e) request for information, 4/16/87.P. 200859-200865. A concurrence form is attached.

153. Letter to Dr. Alan Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Bruce P. Smith, U.S. EPA, re:Period of negotiation, 2/1/88. P. 200866-200867.

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154. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Waste management practices at Newport, 9/23/91.P. 200868-200896. The following are attached:

a) a letter regarding corrections to Du Font'swaste manifest documents;

b) a letter regarding corrected items for DuPont's waste manifest documents;

c) seven corrected Hazardous Waste Manifests;

d) a letter regarding revised manifests;

e) two revised manifest forms;

f} an envelope;

g) a map of the North and South Bank DisposalSites.

155. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JosephJ. Sasso, CIBA-GEIGY Corporation, re: Partial responseto the 104 (e) inquiry, 2/19/90. P. 200897-202510. Thefollowing are attached:

a) the response to question 1 of the 104 (e)inquiry, attachments 1 through 12:

- Attachment 1, Test Boring Results,1/26/84, outside of landfill;

- Attachment 2, Test Boring Results, 11/9/84,outside of landfill;

- Attachment 3, Analytical Data for ExcavatedSoils from Construction of Building A-52,4/13/87;

- Attachment 4, Soil Characterization forUnderground Storage Tank Soils Removed fromOutside Building A-200, 10/11/88;


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- Attachment 7, Soil Characterization of Sub-floor with Building A-100, 12/7/88;

- Attachment 8, Duffield SoilCharacterization Study, 11/10/88 & 1/89;

- Attachment 9, Soil Characterization forProposed Solvent Storage Building, 2/1/89;

- Attachment 10, Soil Analysis of DryingLagoon Used for Reservoir Aids, 2/23/89;

- Attachment 11, Soil Characterization forA-20 Loading Dock;

- Attachment 12, Soil CharacterizationOutside of Powerhouse, 12/20/89.

b) the response to question 2 of the 104 (e)inquiry, attachments 1 through 9:

- Attachment 1, Discharge Monitoring ReportsJanuary 1981 - Present;

- Attachment 2, NPDES Permit DE0000400Application, 1981;

- Attachment 3, NPDES Permit DE0000400Application, 1988;

- Attachment 4, Analytical Data of StormSewer Discharges for January 90;

- Attachment 5, Miscellaneous Analytical DataRegarding Zinc Contamination in the StormSewer System;

- Attachment 6, Miscellaneous Analytical DataRegarding Stormwater Discharges from Site;

- Attachment 7, Biotoxicity Notifications &Correspondences;

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- Attachment 8, Static Acute ScreeningToxicity Tests for Outfall 001, February1990;

- Attachment 9, Written Report of VideoInspection of Outfall 001 Storm Sewer System,July 1989.

c) the response to question 3 of the 104(e)inquiry, attachment 1:

- Attachment 1, Chemical Inventory Printed by"Area Used" Category.

d) the response to question 4 of the 104(e)inquiry, attachment 1:

- Attachment 1, Question 4 Summary(information concerning ground watermonitoring wells).

156. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JosephJ. Sasso, CIBA-GEIGY Corporation, re: Final responseto the 104(e) inquiry, 3/23/90. P. 202511-202626. Thefollowing are attached:

a) the response to question 1 of the 104(e)inquiry, attachments 1 through 3:

- Attachment 1, Listing of hazardous wastesgenerated, disposed, or otherwise handled;

- Attachment 2, Listing of Hazardoussubstances generated, disposed, or otherwisehandled in the production area;

- Attachment 3, Listing of hazardoussubstances generated, disposed, or otherwisehandled in the laboratories.

b) the response to question 2 of the 104 (e)inquiry attachments 1 through 4:

- Attachment 1, Summaries of hazardous wastesgenerated and disposed off-site (1985-1990);

- Attachment 2, RCRA Annual Reports 1985-1989;

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- Attachment 3, Summary of 1984 hazardouswaste generation;

- Attachment 4, Hazardous substances used inthe laboratories.

c) the response to question 3 of the 104 (e)inquiry, attachments 1 through 7:

- Attachment 1, Summary of perchloroethyleneuse at the CIBA-GEIGY Newport plant;

- Attachment 2, Summary of trichloroethyleneuse at the CIBA-GEIGY Newport plant;

- Attachment 3, Perchloroethylene purchases(1982 - 1989);

- Attachment 4, Perchloroethylene disposedoff-site;

- Attachment 5, SARA 313 reporting data forperchloroethylene;

- Attachment 6, Perchloroethylene reductionprogram;

- Attachment 7, Perchloroethylene analyticaldata.

157. Report: Analytical Report for CIBA-GEIGY Corporation,prepared by Northeastern Analytical Corporation,12/31/91. P. 202627-203439. The following areattached:

a) a Laboratory Deliverables form;

b) a report entitled "Leak Detection and MappingSurvey," dated January 27, 1992;

c) a memorandum regarding static testing of thefire water reservoirs, dated May 7, 1992;

d) a letter regarding transmittal of informationrequested by EPA, dated May 28, 1992;

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e) a letter regarding an outline of testing tobe performed by CIBA-GEIGY Corporation, datedMay 28, 1992;

f) Attachment 2, Project Schedule;

g) a diagram of Main Trunk Line and ConnectingProcess Sewer Lines;

h) a diagram of the Newport Works EmergencyResponse Layout;

i) a memorandum regarding the testing of outfallfor metals, organics, and biotoxicity.

158. Letter to Mr. Joseph Wutka, Delaware Department ofTransportation, from Ms. Joan Armstrong, U.S. EPA, re:A request from EPA for copies of the construction plansof Basin Road and for boring data, A/2/92. P. 203440-203441. A site map is attached.

159. Handwritten notes, re: Discussion with Ms. JoanArmstrong about 104(e) letters to Du Pont concerningBanning Park, 4/30/92. P. 203442-203442.

160. Letter to Mr. Raymond M. Harbeson, Delaware Departmentof Transportation, from Mr. Larry S. Miller, U.S. EPA,re: A request for information, 6/22/92. P. 203443-203449. The following are attached:

a) an Information Requirement Enclosure;

b) Enclosure 1, a site map;

c) Enclosure 2, the caption of a diagram ofRoute 141;

d) a cross section diagram of two boring wells.

161. Letter to Mr. Raymond Richter, Delaware Department ofTransportation, from Mr. Wayne Walters, U.S. EPA, re:Extension of time to respond to the informationrequest, 7/24/92. P. 203450-203450.

162. Handwritten summary notes, re: Thiorated nickel,prepared by P.E. Kress, (undated). P. 203451-203470.The following are attached:

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a) a background information outline;

b) handwritten notes regarding radiation;

c) a letter regarding radioactive thorium waste,dated July 5, 1979;

d) handwritten notes regarding thoriated nickel;

e} a pre-startup safety survey dated November 6,1961;

f) a letter regarding licensing to authorize theuse of thorium salts at the Du Pont Newportplant, dated October 16, 1961;

g) two envelopes.

163. Letter to Mr. Joseph Wutka, State of DelawareDepartment of Transportation, from Ms. Joan Armstrong,U.S. EPA, re: Request by EPA for the constructionplans of Basin Road, 4/2/92. P. 203471-203473. A sitemap and a certified mail receipt are attached.

164. Letter to Mr. Joseph Wutka, State of DelawareDepartment of Transportation, from Ms. Joan Armstrong,U.S. EPA, re: Request for additional maps of BasinRoad, 4/23/92. P. 203474-203475. A facsimiletransmittal sheet is attached.

165. Letter to Ms. Joan Armstrong, U.S. EPA, from Mr. JosephT. Wutka, State of Delaware Department ofTransportation, re: Access Road Plans and specifics onborings A-Z, R-5, and R-9 requested by EPA, 5/6/92.P. 203476-203476.

166. Letter to Mr. Raymond M. Harbeson, State of DelawareDepartment of Transportation, from Mr. Larry S. Miller,U.S. EPA, re: 104 (e) request for information, 6/22/92.P. 203477-203484. The following are attached:

a) an Information Requirement Enclosure;b) a site map;c) the caption of a site plan;d) a boring well cross-section diagram;e) a certified mail receipt.

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167. Telephone conversation record of J.A. with Mr. RaymondRichter, DelDOT [sic], re: Request for an extension torespond to the 104 (e) inquiry, 7/2/92. P. 203485-203485.

168. Letter to Mr. Raymond Richter, State of DelawareDepartment of Transportation, from Mr. Wayne Walters,U.S. EPA, re: Granting of an extension of time torespond to the 104 (e) inquiry, 7/24/92. P. 203486-203488. Two certified mail receipts are attached.

169. Letter to Mr. Larry S. Miller, U.S. EPA, from Mr.Raymond D. Richter, State of Delaware Department ofTransportation, re: Response to 104 (e) inquiry,8/17/92. P. 203489-203826. The following areattached:

a) two envelope address labels;

b) the response to question 1 of the 104 (e)inquiry;

c) the response to question 2 of the 104 (e)inquiry, parts a through c;

d) the response to question 3 of the 104 (e)inquiry, parts a and b;

e} the response to question 4 of the 104(e)inquiry, parts a through f;

f) the response to question 5 of the 104(e)inquiry;

g) the response to question 6 of the 104(e)inquiry;

h) construction plans, sheet numbers 17, 32through 35, 42, 43, 49, and 50;

i) boring well cross-section diagrams, sheetnumbers 151 through 157.

170. Letter to Mr. Joseph Stasso, Ciba-Giegy, from Mr,Thomas C. Voltaggio, U.S. EPA, re: 104 (e) letterrequest for information, 2/7/90. P. 203827-203831.

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III. REMEDIAL RESPONSE PLANNING

1. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. JosephJ. Hardman, DNREC, re: State of Delaware comments onthe Du Pont-Newport Site Consent Order, RemedialInvestigation/Feasibility Study Work Plan, andHydrogeology Report, 3/17/88. P. 300001-300008.

2. Report: Remedial Investigation/Feasibility Study,Review of Existing Information, Holly Run Plant Site.Newport, Delaware, prepared by Woodward-ClydeConsultants, 3/21/88. P. 300009-300055.

3. Report: Work Plan, Remedial Investigation/FeasibilityStudy. Vol. Ill, Quality Assurance Project Plan andHealth and Safety Plan, Du Pont-Newport Site, Newport.Delaware, prepared by Woodward-Clyde Consultants,4/7/88. P. 300056-300472.

4. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Co., from Mr. Frank S. Waller, Woodward-ClydeConsultants, re: Transmittal of a Site DevelopmentStudy, 4/18/88. P. 300473-300656. The study isattached.

5. Report: Preliminary Health Assessment for E.I. DuPont-Newport Plant Landfill, Newport. Delaware,prepared by Office of Health Assessment, Agency forToxic Substances and Disease Registry, U.S. PublicHealth Service, 5/11/88. P. 300657-300659.

6. Letter to Ms. Diane Simms, U.S. EPA, from Mr. John E.Farrell, II, Environmental Testing and CertificationCorp., re: Transmittal of the performance and auditinformation, 6/8/88. P. 300660-300812. Theperformance and audit information is attached.

7. Letter to Mr. Gerardo Armador [sic], U.S. EPA, from Mr.Paul Fikac, Jacobs Engineering Group Inc., re:Transmittal of a paper entitled "Geological Factorsthat Influence Radon Availability," and a study on"Potential Biotransformations of Chemical CompoundsDetected at the Byers Warehouse Site," 6/13/88.P. 300813-300850. The paper and study are attached.

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8. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr. A.B. Palmer, E.I. du Pont de Nemours & Company, Inc., re:Transmittal of Work Plan, Remedial Investigation/Feasibility Study, 7/28/88. P. 300851-300851.

9. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Roger T. Gresh, Woodward-ClydeConsultants, re: Transmittal of Work Plan, RemedialInvestigation/Feasibility Study, 7/29/88. P. 300852-301009. The Work Plan is attached.

10. Report: Work Plan, Remedial Investigation/FeasibilityStudy. Du Pont-Newport Site, Newport. Delaware, Volume2. Appendices A to F, prepared by Woodward-ClydeConsultants, 7/28/88. P. 301010-301552.

11. Report: Work Plan, Remedial Investigation/FeasibilityStudy, Du Pont-Newport Site, Newport. Delaware, Volume3. Appendices G to L, prepared by Woodward-ClydeConsultants, 7/28/88. P. 301553-301942.

12. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Joseph F. Hardman, DNREC, re: General comments on therevised Remedial Investigation Work Plan (secondrevision), 8/22/88. P. 301943-301943.

13. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr.Raymond L. Hinkle, Woodward-Clyde Consultants, re:Aquatic Biota sampling, 9/6/88. P. 301944-301944.

14. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Gerardo R. Amador, U.S. EPA,re: Approval of the Remedial Investigation/FeasibilityStudy Work Plan, 9/22/88. P. 301945-301948. ARemedial Investigation/Feasibility Study schedule and aletter regarding the revised RemedialInvestigation/Feasibility Study are attached.

15. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Mr.Randall G. Waite, U.S. EPA, re: Comments on theDu Pont-Newport Remedial Investigation/FeasibilityStudy Work Plan, 9/26/88. P. 301949-301949.

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16. Letter to Mr. Ray Hinkel, Woodward-Clyde Consultants,from Ms. June Mirecki, U.S. EPA, re: Confirmation oftelephone conversation of September 22, 1988 in whichthe Christiana River sediment sampling sites wereestablished, 9/26/88. P. 301950-301951. A site mapapproximating sediment sampling locations is attached.

17. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc., re: Splitsampling activities, 11/15/88. P. 301952-301954.

18. Letter to Ms. Diann [sic] Simms, U.S. EPA, from Mr.Gerardo Amador, U.S. EPA, re: Transmittal of tworeports entitled "Quality Assurance/Quality ControlAudit Phase I - Remedial Investigation Data, Du Pont-Newport Site, Wilmington, Delaware," and "ChemistryReport - Du Pont-Newport Site," 11/15/88. P. 301955-301987. The Quality Assurance/Quality Control Auditreport is attached.

19. Contract Laboratory Program, Regional/LaboratoryCommunication System Telephone Record Log, re: Trafficreport copies for sample numbers CQ140 and CQ141,11/17/88. P. 301988-301988.

20. Letter to Ms. Annette Lage, U.S. EPA, from Mr. Paul J.Fikac, Jacobs Engineering Group Inc., re: Transmittalof the corrected sample shipping log and trafficreports, 11/17/88. P. 301989-301992. The sampleshipping log and traffic reports are attached.

21. Memorandum to Mr. Gerardo Amadour [sic], U.S. EPA, fromMs. Diann Sims [sic], U.S. EPA, re: Review of QualityAssurance/Quality Control Audit Report and transmittalof a Region III Data Review Report, 11/22/88.P. 301993-302084. The Data Review Report is attached.

22. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Diana Baldi, U.S. EPA, re: Transmittal of the OrganicData Validation Review, 12/16/88. P. 302085-302139.The review is attached.

23. Contract Laboratory Program, Regional/LaboratoryCommunication System Telephone Record Log, re:Receipts of a "field blank" with no CLP sample number,12/22/88. P. 302140-302141.

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24. Telephone conversation record of Mr. Mike Apgar, DNREC,with Mr. Randy Sturgeon, U.S. EPA, re: Draining ofaquifer to Christiana River, 1/2/89. P. 302142-302142.

25. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Diana Baldi, U.S. EPA, re: Transmittal of theInorganic Data Validation Review, 1/5/89. P. 302143-302160. The review is attached.

26. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc, re: Groundwater split sampling activities, 1/19/89. P. 302161-302167. Two Chain of Custody Records and two OrganicTraffic Reports are attached.

27. Letter to Ms. Annette Lage, U.S. EPA, from Mr. Paul J.Fikac, Jacobs Engineering Group Inc., re: Transmittalof the corrected sample shipping log, 2/1/89.P. 302168-302169. The sample shipping log is attached.

28. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Transmittal of theOrganic Data Validation Review, 2/27/89. P. 302170-302221. The review is attached.

29, Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Transmittal of theOrganic Data Validation Review, 2/28/89. P. 302222-302237. The review is attached.

30. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Gerald T. Coyle, Woodward-ClydeConsultants, re: Transmittal of QualityAssurance/Quality Control Audit, 3/8/89. P. 302238-302268. The audit is attached.

31. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Transmittal of theOrganic Data Review, 3/20/89. P. 302269-302361. Thereview is attached.

32. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Transmittal of Wetlands Investigation Report, 3/23/89.P. 302362-302510. The report is attached.

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33. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Transmittal of theInorganic Data Review, 3/29/89. P. 302511-302528. Thereview is attached.

34. Memorandum to Ms. Galina B. Chadwick, DNREC, from Ms.Diane E. Wehner, DNREC, re: Comments on the wetlandsinvestigation, 4/10/89. P. 302529-302530.

35. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Gerardo Amador, U.S. EPA, re:Transmittal of EPA's comments on the WetlandsInvestigation and the Federal Manual for Identifyingand Delineating Jurisdictional Wetlands, 4/27/89.P. 302531-302536. The comments are attached.

36. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Transmittal of Data Sufficiency Memorandum, 4/27/89.P. 302537-302537.

37. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Roger T. Gresh, Woodward-ClydeConsultants, re: Transmittal of Data SufficiencyMemorandum, 4/27/89. P. 302538-302538.

38. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Dr. Bernard J. Franks, Woodward-Clyde Consultants, re: Transmittal of Data SufficiencyMemorandum, 4/27/89. P. 302539-302975. The memorandumis attached.

39. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.James V. Husted, Woodward-Clyde Consultants, re:Transmittal of Pre-Screening Remedial AlternativesReport, 5/23/89. P. 302976-302976.

40. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. James V. Husted, Woodward-ClydeConsultants, re: Transmittal of Pre-Screening RemedialAlternatives Report, 5/23/89. P. 302977-303007. Thereport is attached.

41. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Transmittalof the Phase III Wetlands Investigation Work Plan,6/8/89. P. 303008-303008.

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42. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc. , from Mr. Raymond L. Hinkle, Woodward-Clyde Consultants, re: Transmittal of the Phase IIIWetlands Investigation Work Plan, 6/8/89. P. 303009-303027. The Work Plan is attached.

43. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Paul Fikac and Dr. Douglas Gonzales,Jacobs Engineering Group; Mr. Roger Gresh and Dr. BenFranks, Woodward-Clyde Consultants; and Mr. SteveJohnson, DNREC, re: Du Pont-Newport Radiology Study,6/23/89. P. 303028-303030. A handwritten transcriptof the telephone conversation is attached.

44. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. PaulFikac, Jacobs Engineering Group Inc., re: Transmittalof an article entitled "The Mobility of Thorium innatural waters at low temperatures," 6/28/89.P. 303031-303045. The article is attached.

45. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BarryA. Vittor, Barry A. Vittor & Associates, Inc., re:Transmittal of the Statement of Qualifications forBioassays and Biological Assessments for HazardousWaste Sites, 8/7/89. P. 303046-303082. The statementof qualifications is attached,

46. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Paul Fikac, Jacobs EngineeringGroup, re: Du Pont-Newport wetlands sampling, 8/10/89.P. 303083-303083.

47. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc., re: Report offield activities for the week of August 8 to 11, 1989,8/31/89. P. 303084-303087.

48. Memorandum to Ms. Colleen Walling, U.S. EPA, from Mr.Paul Fikac, Jacobs Engineering Group Inc., re:Transmittal of SAS request for split sampling forradionucleide analysis, 9/26/89. P. 303088-303167.The SAS request is attached.

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49. Telephone conversation record of Mr. Roger Gresh,Woodward-Clyde Consultants, and Ms. Alyce Fritz,National Oceanic and Atmospheric Administration (NOAA)with Mr. Randy Sturgeon, U.S. EPA, re: Du Pont-Newportfish tissue detection limits, 10/2/89 - 10/3/89.P. 303168-303168.

50. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Transmittal of theInorganic Data Validation Review, 10/18/89. P. 303169-303188. The review is attached.

51. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. J.David Martin, Teledyne Isotopes, re: Transmittal ofanalytical procedures for the determination of Ra-228,10/20/89. P. 303189-303199. The analytical proceduresare attached.

52. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Transmittal of theOrganic Data Validation Review, 10/23/89. P. 303200-303258. The review is attached.

53. Memorandum to Ms. Colleen Walling, U.S. EPA, from Mr.Randy Sturgeon, U.S. EPA, re: SAS Request forRadionucleide Analysis at Du Pont-Newport NationalPriorities List (NPL) Site, 11/6/89. P. 303259-303260.

54. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Transmittalof Data Sufficiency Supplement, 11/8/89. P. 303261-303261.

55. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Roger T. Gresh, Woodward-ClydeConsultants, re: Transmittal of Data SufficiencySupplement, 11/8/89. P. 303262-303531. The report isattached.

56. Telephone conversation record of Mr. Bill Belanger,U.S. EPA, with Mr. Randy Sturgeon, U.S. EPA, re: DuPont-Newport radiological contamination, 11/29/89.P. 303532-303532.

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57. Memorandum to Mr. Mike Bass, U.S. EPA, from Mr. BillBelanger, U.S. EPA, re: Radiation at the site,11/29/89. P. 303533-303537. A publication entitled"Nationwide Occurrence of Radon and Other NaturalRadioactivity in Public Water Supplies" is attached,

58. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. A.B.Palmer, E.I. du Pont de Nemours & Company, Inc., re:Transmittal of requested information, 12/7/89.P. 303538-303550. The following are attached:

a) a letter regarding close out surveys;

b) an attachment regarding radiological concernsof disposal procedures;

c) an attachment regarding radiation levels;

d) an attachment of standard operatinginstructions for disposal of waste materials;

e) a letter regarding a Nuclear RegulatoryCommission site visit;

f) three sketches showing burial locations forthorium;

g) handwritten notes regarding thorium.

59. Map of area surrounding Du Pont-Newport Landfill andTown of Newport Wells, (undated). P. 303551-303551.

60. Newport Plant Sewer Map, Schematic Layout, Sheet 1,drawn by CER, 2/8/84. P. 303552-303552.

61. Report: Work Plan, Remedial Investigation/FeasibilityStudy, Du Font-Newport Site, Newport. Delaware, VolumeIII. Attachment A - Quality Assurance Project PlanfOAPP) and Attachment B - Health and Safety Plan(HASP). prepared by Woodward-Clyde Consultants, 4/7/88.P. 303553-303971.

This information has been considered ConfidentialBusiness Information.

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62. Performance Evaluation Sample and LaboratoryPerformance Audits information package, prepared byEnvironmental Testing and Certification Corporation,6/8/88. P. 303972-304123. A cover letter is attached.

63. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, from Mr. Gerardo R. Amador, U.S. EPA, re: EPAcomments on the revised Remedial Investigation/Feasibility Study (RI/FS), 6/24/88. P. 304124-304131.

64. Report: Revision 2, Quality Assurance Project Plan(OAPP) For Remedial Investigation/Feasibility Study. DuPont-Newport Site, prepared by Woodward-ClydeConsultants, 7/28/88. P. 304132-304617.

65. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Analytical data for the Du Pont-Newport Site, 2/21/89.P. 304618-304618.

66. Report: Water Well Sampling. Summary of AnalyticalResults, prepared by E.I. du Pont de Nemours & Company,Inc., 3/28/89. P. 304619-304635. A transmittal slipis attached.

67. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Gerardo R. Amador, U.S. EPA,re: EPA comments on two reports, 4/27/89. P. 304636-304640. The comments are attached.

68. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re: Datasufficiency meeting summary, 5/17/89. P. 304641-304643.

69. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Mark R. Noll, U.S. EPA, re: Concerns about future workat the Du Pont-Newport Site, 5/18/89. P. 304644-304645.

70. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Comments on the Data Sufficiency memorandum, 6/21/89.P. 304646-304651. A copy of the Data Sufficiencymemorandum is attached.

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71. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Phase IIIWetlands Work Plan, 7/25/89. P. 304652-304656.

72. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Data sufficiency meeting, 8/3/89. P. 304657-304657.

73. Report: Statement of Qualifications for Barry A.Vittor & Associates. Inc., prepared by Barry A. Vittor& Associates, Inc., 8/7/89. P. 304658-304695.

74. Report: Quality Assurance Project Plan, prepared by'CompuChem Laboratories, 9/7/89. P. 304696-305026.

75. Report: Laboratory Quality Assurance Plan, prepared byLancaster Laboratories, 8/22/89. P. 305027-305142.

76. Report: Monthly Progress Report No. 13, prepared byWoodward-Clyde Consultants, 9/7/89. P. 305143-305144.

77. Report: 1989 Qualification Manual, prepared byLancaster Laboratories, 9/7/89. P. 305145-305249.

78. Report: Phase III Wetland Investigation Technical DataSummary Report. Du Pont-Newport, prepared by Woodward-Clyde Consultants, 9/7/89. P. 305250-305511.

79. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Paul Filrac, Jacobs EngineeringGroup Inc., re: Sediment samples, 9/27/89. P. 305512-305512.

80. Report: Handbook of Suggested Practices for the Designand Installation of Ground-Water Monitoring Wells.prepared by U.S. EPA, 10/89. P. 305513-305547. Thefollowing are attached:

a) a letter regarding EPA position on drillingmud;

b) Hollow-Stem Auger information;



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c) a magazine article;

d) excerpt from a report entitled "RCRA Ground-Water Monitoring Technical EnforcementGuidance Document;"

e) excerpt form a report entitled "PracticalGuide for Ground-Water Sampling."

81. Report: Monthly Progress Report No. 14. prepared byWoodward-Clyde Consultants, 10/6/89. P. 305548-305552.A memorandum regarding fish tissue analysis isattached.

82. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Ms. Laurie Brown, CRL, re: Review ofSAS request, 11/2/89. P. 305553-305553.

83. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. David Martin, Teledyne, re:Radionucleides, 11/2/89. P. 305554-305554.

84. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Paul Filrac, Jacobs EngineeringGroup Inc., re: Radionucleide samples, 11/3/89.P. 305555-305555.

85. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Wetland splits, 11/6/89.P. 305556-305556.

86. Record of telephone conversation of Mr. Randy Sturgeon,U.S. EPA, with Mr. Ken Taft, DNREC, re: Air permits,11/28/89. P. 305557-305557.


88. Report: Phase III Wetlands Investigation TechnicalData Summary Report, Du Pont-Newport Site, prepared byWoodward-Clyde Consultants, 1/90. P. 305561-305814.


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90. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re: Groundwater data information, 1/17/90. P. 305818-305820. Asite map is attached.

91. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Stephen F. Johnson, DNREC, re: Du Pont-Newportmeeting, 2/12/90. P. 305821-305822.

92. Facsimile sheet to Mr. Randy Sturgeon, U.S. EPA, fromMs. Doris J. Foster, U.S. Nuclear Regulatory Commission(USNRC), re: Information pertaining to the Du Pont-Newport Site, 2/22/90. P. 305823-305902. Thefollowing are attached:

a) a letter regarding a telephone inquiry;

b) a memorandum regarding confirmation of atelephone conversation;

c) a letter regarding safety inspection81-11;

d) USNRC Office of Inspection and EnforcementReport;

e) a handwritten note regarding informationpreviously sent;

f) three U.S. Atomic Energy Commission (USAEC)Source Material Licenses;

g) a letter regarding extension of theexpiration date of USAEC Source MaterialLicense No. STB-489;

h) a letter regarding amending part of USAECSource Material License No. STB-489;

i) a note regarding inspection of the Du Pont-Newport Site;

j) USNRC Office of Inspection and EnforcementReport;

k) letter regarding discontinuation ofoperations performed under USAEC SourceMaterial License No. STB-489;

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1) letter regarding survey of drain-gutters;

m) letter regarding agreement between E.I. duPont de Nemours and Fansteel MetallurgicalCorporation;

n) letter regarding Source Material License No.STB 489 expiration;

o) letter regarding renewal of Source MaterialLicense No. STB-489;

p) two letters regarding withholding of AppendixB from public inspection;

q) two memorandums regarding withholdingAppendix B;

r) memorandum regarding summary of andwithholding of Appendix B;

s) letter regarding renewal of License No. STB-489;

t) USAEC Application for Source Material LicenseNo. STB-489;

u) supplemental information pertaining tolicense No. STB-489;

v) notice regarding Appendix B information;

w) USAEC Inspection Findings and LicenseeAcknowledgement for License No. STB-489;

x) letter regarding amending of Source MaterialLicense No. STB-489;

y) letter regarding approval of a container forshipment of radioactive material;

z) notice regarding Appendix B information;

aa) letter regarding amendment of License STB-489;

bb) letter regarding tests on effluent;

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cc) memorandum regarding tests on effluent;

dd) letter regarding request for information tobe treated as confidential;

ee) memorandum regarding confidentiality ofinformation;

ff) memorandum regarding amending of License No,STB-489;

gg) letter regarding transfer of operations to anew location;

hh) letter regarding vents and testing;

ii) notice regarding Appendix A;

jj) letter regarding amendment to Source MaterialLicense No. STB-489;

kk) letter regarding use of Thorium;

11) notice regarding Appendix A;

mm) letter regarding processing of License No.STB-489;

nn) notice regarding Appendix A;

oo) letter regarding withholding of Appendix Afrom public inspection;

pp) letter regarding compliance with the use ofThorium;

qq) amendment to Appendix A;

rr) letter regarding request for a license;

ss) letter regarding request for a license forthe Newport plant.

93. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re:Comments on pre-screening of Remedial alternatives,2/26/90. P. 305903-305904.

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94. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re: Datasufficiency for the RI report, 3/8/90. P. 305905-305909. A proposed schedule is attached.

95. Memorandum to Mr. Robert Ambrose, U.S. EPA, from Mr.Randy Sturgeon, U.S. EPA, re: Request for technicianassistance, 3/8/90. P. 305910-305910.

96. Telephone conversation record of Mr. Chuck McNally,DNREC, with Mr. Randy Sturgeon, U.S. EPA, re: Wetlandsat the Du Pont-Newport Site, 3/8/90. P. 305911-305911.

97. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AlyceT. Fritz, U.S. Department of Commerce, re: Review ofPhase III Wetlands Investigation, 3/20/90. P. 305912-305915.

98. Telephone conversation record of Mr. Roy Smith, U.S.EPA, with Mr. Randy Sturgeon, U.S. EPA, re: Maximummetals of fish tissue data, 3/28/90. P. 305916-305916.

99. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re:Comments on review of Phase III Wetlands Investigation,3/29/90. P. 305917-305920.

100. Memorandum to Mr. Bob Ambrose, U.S. EPA, from Mr. JimLazorchak, U.S. EPA re: Comments on Phase III WetlandsInvestigation Technical Data Summary Report, 4/9/90.P. 305921-305931. The following are attached:

a) a memorandum regarding review of Phase IIIWetlands Investigation;

b) a memorandum regarding comments on the DuPont-Newport Site;

c) Technical Assistance notes;

d) handwritten notes regarding Phase IIIWetlands Investigation,

101. Report: Draft Work Plan - Phase III RemedialInvestigation/Feasibility Study, Du Pont-Newport Site,prepared by WoodwardrClyde Consultants, 4/12/90.P. 305932-305964. Three cover letters are attached.

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102. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re: Reviewof Component A of the Draft Work Plan, 4/24/90.P. 305965-305966.

103. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: MonthlyProgress Report No. 21, 5/9/90. P. 305967-305969.

104. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Trip report, 5/9/90.P. 305970-305971.

105. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Reviewcomments of the Draft Work Plan, 5/31/90. P. 305972-305975.

106. Report: Preliminary Physical Characterization of PointSource Discharges of Newport Facility, Newport,Delaware, prepared by S.T. Hudson Engineers, Inc.,6/13/90. P. 305976-306014.

107. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Draft WorkPlan and Progress Report No. 22, 6/21/90. P. 306015-306020.

108. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Comments onSupplemental Phase III Wetlands Investigation, 7/5/90.P. 306021-306027.

109. Letter to Mr. Rick Green, DNREC, from Mr. RandySturgeon, U.S. EPA, re: Lead levels in fish, 7/5/90.P. 306028-306040. Seven Tissue Analyses charts, twoBlood Lead Contamination charts, and a memorandum areattached.

110. Handwritten notes on recommendations for the ChristianaRiver near Newport, DE, 7/13/90. P. 306041-306046. Afacsimile cover sheet, a handwritten transmittal note,and a record of communication are attached.

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111. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh and Mr. Alfred M. Hirsch, Woodward-ClydeConsultants, re: Drilling procedures for wells,7/17/90. P. 306047-306052. Two Schematic Diagrams anda record of communication are attached.

112. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Welllocation MW-28, 7/18/90. P. 306053-306054. A FullHorizon Soil Analyses chart is attached.

113. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AlyceT. Fritz, U.S. Department of Commerce, re: Review ofthe Phase III Wetlands Investigation, 7/25/90.P. 306055-306056.

114. Telephone conversation record of Mr. Roger T. Gresh,Woodward-Clyde Consultants, with Mr. Randy Sturgeon,U.S. EPA, re: Well drilling, 8/1/90. P. 306057-306057.

115. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Anthony J. Vellios, Dynamac Corporation, re: MonthlyField Trip Report, 8/2/90. P. 306058-306082. A letterand handwritten notes from the field trip are attached.

116. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Timothy J. Hill, E.I. du Pont de Nemours & Company,Inc., re: Screen intervals for ground water monitoringwells, 8/3/90. P. 306083-306083.

117. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Phase III well screeningplacement, 8/8/90. P. 306084-306095. The followingare attached:

a) handwritten notes on a meeting with Woodward-Clyde Consultants;

b) a copy of a letter on screen intervals withhandwritten notes;

c) a site map;

d) handwritten on-site boring notes;

e) handwritten attendance list of a meeting atHolly Run.

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118. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re:Response to comments on the Phase III Wetlands RI/FSstudy, 8/9/90. P. 306096-306120. The following areattached:

a) a facsimile cover sheet;

b) a memorandum regarding methods fordetermining amorphous iron oxides;

c) a report entitled "Determination of SorbedMetals, Amorphic Fe, Oxidic Mn, and ReactiveParticulate Organic Carbon in Sediments andSoils;"

d) letter regarding lead levels in fish;

e) seven Tissue Analyses charts;

f) two Blood Lead Contamination charts.

119. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Well screening depths,8/19/90. P. 306121-306121.

120. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Shallow soilanalysis, 8/17/90. P. 306122-306126. Two soilanalyses charts and a record of communication areattached.

121. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Phase IIIDrilling Program and Progress Report No. 24, 8/20/90.P. 306127-306132. Two site maps are attached.

122. Letter to Mr. Joseph Sasso, CIBA-GEIGY Corporation,from Mr. Richard A. Long, S.T. Hudson Engineers Inc.,re: Survey of exposed outfall lines along theChristiana River, 8/22/90. P. 306133-306134.

123. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Richard W. Greene, DNREC, re: Lead contamination infish, 8/31/90. P. 306135-306141. A letter and twoBlood Lead Contamination charts are attached.

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124. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert B. Ambrose, Jr., re: Speciation modeling andsensitivity testing, 9/19/90. P. 306142-306157. Amemorandum, information on sensitivity testing, andinformation on sulfide in sediments are attached.

125. Handwritten letter to Randy from Eric, re: Sedimentsampling, 9/24/90. P. 306158-306158.

126. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Screen settings for well clusters 29 and 34, 9/24/90.P. 306159-306159.

127. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re:Request for work to be done as part of the RI, 10/2/90.P. 306160-306161.

128. Report: Summary of Technical Expertise andQualifications, prepared by Hazleton LaboratoriesAmerica, Inc., 10/3/90. P. 306162-306259. A coverletter is attached.

129. Report: Enseco Incorporated Quality Assurance ProgramPlan for Environmental Chemical Monitoring, prepared byEnesco Incorporated, 10/3/90. P. 306260-306374.

130. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Fish studies, 10/5/90.P. 306375-306375.


132. Facsimile sheet to Mr. Randy Sturgeon, U.S. EPA, fromMr. James Buczala, Woodward-Clyde Consultants, re:Phase III RI, 10/11/90. P. 306380-306382. Two sitemaps are attached.

133. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Anthony J. Vellios, Dynamac Corporation, re: MonthlyField Trip Report, 10/23/90. P. 306383-306412. Amemorandum and handwritten notes on the field trip areattached.

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134. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Pat McManus, U.S. EPA, re: Change of laboratories fortoxicity analysis, 10/24/90. P. 306413-306414.

135. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Wetlands at the Du Pont-Newport Site, 10/29/90. P. 306415-306415.

136. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Karl Kalbacher, DNREC, re:Fish tissue analysis, 10/29/90. P. 306416-306416.

137. Letter to Mr. Randy Sturgeon, U.S. EPA, and Mr. KarlKalbacher, DNREC, from Ms. Cecil Mancini and Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Phase IIIWetlands Investigation Fish Sampling Program, 10/31/90.P. 306417-306421.

138. Letter to Mr. Randy Sturgeon, U.S. EPA, and Mr. KarlKalbacher, DNREC, from Mr. Roger T. Gresh, Woodward-Clyde Consultants, re: Ground water seepage samplingand MW-33 B(R), 11/8/90. P. 306422-306428. Two groundwater seepage charts and a site sketch are attached.

139. Report: Statement of Qualifications and Experience.prepared by TAI Environmental Sciences, Inc., 11/14/90.P. 306429-306485.


141. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Anthony J. Vellios, Dynamac Corporation, re: MonthlyField Trip Report, 11/27/90. P. 306490-306505. Aletter, handwritten notes, and photographs of the fieldtrip are attached.

142. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlKalbacher, DNREC, re: Review of the draft Human Healthand Environmental Assessment, 1/18/90. P. 306506-306506.

143. Report: Final Work Plan, Phase III RemedialInvestigation/Feasibility Study. Du Pont-Newport Site,Volume 1, prepared by Woodward-Clyde Consultants,2/5/91. P. 306507-306591.

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144. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Phase IIIsoil sampling, 2/7/91. P. 306592-306594.

145. Handwritten attendance list from a Risk Assessmentworkshop, 2/20/91. P. 306595-306595.

146. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Soil sampling, 2/20/91. P. 306596-306596.

147. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: RI/FScalendar schedule, 2/21/91. P. 306597-306599. Thecalendar is attached.

148. Memorandum to Mr. Victor Guide, U.S. EPA, from Mr. W.Wade Talbot, U.S. EPA, re: Transmittal of the FinalReport, 3/6/91. P. 306600-306600.

149. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: RiskAssessment Workshop, 3/11/91. P. 306601-306609. Thefollowing are attached:

a) General Intake and Exposure Parameters chart;

b) Soil Ingestion Parameters chart;

c) Soil Dermal Parameters chart;

d) Surface Water Parameters chart;

e) handwritten Risk Assessment Workshopattendance list.

150. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, re: Waste management plan, 3/12/91.P. 306610-306610.

151. Report: Supplemental Phase III RI Tasks, prepared byE.I. du Pont de Nemours & Company, Inc., 3/12/91.P. 306611-306804.

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152. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Anthony J. Vellios, Dynamac Corporation, re: MonthlyField Trip Report, 8/13/91. P. 306805-306818. Aletter, handwritten notes, and photographs of the siteare attached.

153. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: RiskAssessment, 3/22/91. P. 306819-306820.

154. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: Incorporation of the groundwater component into the Risk Assessment, 3/28.P. 306821-306822.

155. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith, U.S. EPA, re: Comments on notes on theRisk Assessment Workshop, 4/1/91. P. 306823-306823.

156. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Soilsampling, 4/5/91. P. 306824-306825.

157. Letter to Mr. Frank Everson, Red Clay ConsolidatedSchool District, from Mr. P. Brandt Butler, E.I. duPont de Nemours & Company, Inc., re: Contaminationstatus of wells, 4/24/91. P. 306826-306834. Twoletters and three residential well sampling charts areattached.


159. Report: Phase III Remedial Investigation DataSufficiency Report, Du Pont-Newport Site, Newport.Delaware. Volume 1 of 4. prepared by Woodward-ClydeConsultants, 5/17/91. P. 306837-306976. Two coverletters are attached.

160. Report: Phase III Remedial Investigation DataSufficiency Report, Du Pont-Newport Site, Newport,Delaware, Volume 2 of 4, prepared by Woodward-ClydeConsultants, 5/17/91. P. 306977-307538.

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161. Report: Phase III Remedial Investigation DataSufficiency Report. Du Font-Newport Site, Newport,Delaware. Volume 3 of 4. prepared by Woodward-ClydeConsultants, 5/17/91. P. 307539-307946.

162. Report: Phase III Remedial Investigation DataSufficiency Report, Du Pont-Newport Site, Newport,Delaware, Volume 4 of 4, prepared by Woodward-ClydeConsultants, 5/17/91. P. 307947-308151.

163. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlKalbacher, DNREC, re: Review of the Phase III RIreport, 6/18/91. P. 308152-308153.

164. Excerpt from review of Phase III RI report, 7/2/91.P. 308154-308154.

165. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Data Sufficient report, 7/12/91. P. 308155-308168.

166. Letter to Ms. Charlotte Necastro from Mr. P. BrandtButler, E.I. du Pont de Nemours & Company, Inc., re:Residential well sampling, 7/17/91. P. 308169-308177.The following are attached:

a) a letter regarding contamination status ofwells;

b) three residential well sampling charts;

c) field notes for residential wells;

d) a site map.

167. Report: Holly Run Plant Soils Complete AnalyticalData, prepared by Woodward-Clyde Consultants, 7/17/91.P. 308178-308240. A cover letter is attached.

168. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Request for the submission of the draft Human HealthRisk Assessment, 9/6/91. P. 308241-308243. A letteris attached.

169. Handwritten attendance list from the River BankMeeting, (undated). P. 308244-308244.

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170. Excerpt from U.S. EPA Federal Register, ProposedGuidelines for Carcinogen Risk Assessment, Request forComments, 11/23/84. P. 308245-308248. A facsimiletransmittal form is attached.

171. Letter to Mr. Christopher J. Corbett, U.S. EPA, fromMr. John M. Lynn, E.I. du Pont de Nemours & Company,Inc., re: Response to letter requesting that Du Pontconduct the RI/FS, 5/1/87. P. 308249-308249.

172. Memorandum to Mr. Christopher Corbett, U.S. EPA, fromMs. Diann Sims, U.S. EPA, re: Comments on the Du Pont-Newport Work Plan, 9/3/87. P. 308250-308253. Amemorandum dated May 28, 1987 regarding the properprocedures for collection of metals samples isattached.

173. Memorandum to Mr. Chris Corbett, U.S. EPA, from Mr. H.Ronald Preston, U.S. EPA, re: Summarization ofcomments on the draft RI/FS Work Plan, 12/9/87.P. 308254-308255.

174. Report: Draft Review Comments on HvdrogeologicalReport, Du Pont-Newport Site, prepared by JacobsEngineering Group Inc., 1988. P. 308256-308266.

175. Report: Wetlands Evaluation Report for the NewportSouth Site, prepared by Woodward-Clyde Consultants,1/88. P. 308267-308304.

176. Memorandum to Mr. Gerry Amador, U.S. EPA, from Mr. MikeBass, U.S. EPA, re: Comments on the Work Plan,2/10/88. P. 308205-308307.

177. Letter to Dr. Alan Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Gerardo R. Amador, U.S. EPA,re: Resolutions and comments concerning the draftRI/FS Work Plan, 3/88. P. 308308-308317.

178. Memorandum to Ms. Angle Garcia, U.S. EPA, from Mr.Gerardo R. Amador, U.S. EPA, re: Comments on the draftPreliminary Assessment, 3/30/88. P. 308318-308318.

179. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr,A.B. Palmer, E.I. du Pont de Nemours & Company,. Inc.,re: Comments addressed in the revised RI/FS Work Plan,4/8/88. P. 308319-308319.

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180. U.S. EPA, Enforcement Branch, Environmental ServicesDivision (ESD) Service Request form, Revised RI/FS WorkPlan, 4/18/88. P. 308320-308320.

181. Drinking Water/Ground Water Protection Branch DocumentReview form, Revised RI/FS Work Plan, 4/25/88.P. 308321-308321.

182. Memorandum to Mr. Gerry Amador, U.S. EPA, from Mr.Bruce Mulholt, U.S. EPA, re: Comments on the RI/FSWork Plan, 4/26/88. P. 308322-308322.

183. Memorandum to Mr. Gerardo R. Amador, U.S. EPA, from Mr.H. Ronald Preston, U.S. EPA, re: Comments on the draftRI/FS Work Plan, 5/5/88. P. 308323-308324.

184. Memorandum to Mr. Mike Bass, U.S. EPA, from Mr. BillBelanger, U.S. EPA, re: Presence of radioactivity atthe site, 5/6/88. P. 308325-308332. A report entitled"Radiological Safety Plan for Decontamination of thePesses Company Metcoa Plant" is attached.

185. RI/FS Schedule, 7/88 through 2/90. P. 308332a-308332a.

186. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc., re:Transmittal of comments on the revised HydrogeologicalReport, 6/13/88. P. 308333-308377. Review comments onthe site and review comments on the HydrogeologicalReport are attached.

187. Agenda for a meeting between EPA and Du Pont, 6/14/88.P. 308378-308382, A letter dated June 8, 1988regarding review comments on the revised RI/FS, amemorandum dated May 25, 1988 regarding review commentson the draft Borehole and Surface Geophysical Report,and handwritten notes regarding site activities areattached.

188. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Mr.Eugene Dennis, U.S. EPA, re: Comments on the RI/FSWork Plan, 6/22/88. P. 308383-308383.

189. Letter to Mr. Paul Fikac, Jacobs Engineering GroupInc., from Mr. Gerardo R. Amador, U.S. EPA, re:Request for review comments on a Chemistry Report,6/22/88. P. 308384-308384.

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190. Letter to Mr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Gerardo R. Amador, U.S. EPA,re: Comments on the revised RI/FS Work Plan and itsappendices, 6/24/88. P. 308385-308439. The followingare attached:

a) Attachment I, a hand-drawn cross sectiondiagram;

b) Attachment II, Selected TransformationReactions for Halogenated Aliphatic CompoundsFound at the Byers Warehouse Site;

c) Attachment III, a memorandum regarding thereview of a Quality Assurance Project Plan;

d) Attachment IV, Radiological Safety Plan forDecontamination of the Pesses Company MetcoaSite.

191. Agenda for a meeting between EPA and Du Pont, 6/29/88.P. 308440-308442. A schematic diagram and a projectflowpath chart are attached.

192. Memorandum to file from Ms. Colleen Leonard Leyden,U.S. EPA, re: Trip to Du Pont headquarters on June 28,1988, 7/1/88. P. 308443-308443.

193. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Paul J. Fikac, Jacobs Engineering Group Inc., re:Summary of a visit to EPA and a reconnaissance and WorkPlan coordinating meeting, 7/6/88. P. 308444-308451.

194. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Paul J. Fikac, Jacobs Engineering Group Inc., re:Review of the Chemistry Report, 7/19/88. P. 308452-308460.

195. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re: Statusof the Remedial Investigation (RI), 8/25/88.P. 308461-308461.

196. Letter to Mr. Paul J. Fikac, Jacobs Engineering GroupInc., from Mr. Gerardo R. Amador, U.S. EPA, re:Request for review comments on the revised RI/FS WorkPlan, 9/2/88. P. 308462-308462.

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197. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re: Changeof drilling contractor, 9/7/88. P. 308463-308463.

198. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re: Changeof contracted geotechnical laboratory, 9/23/88.P. 308464-308464.

199. Letter to Mr. Gerardo Armador [sic], U.S. EPA, from Mr.Paul Fikac, Jacobs Engineering Group Inc., re: Fieldoversight report for activities at the site conductedduring the week of September 19, 1988, 9/28/88.P. 308465-308467.

200. Facsimile transmittal sheet to Mr. Gerardo Amador, U.S.EPA, from Mr. Paul Fikac, Jacobs Engineering GroupInc., re: Sampling information for the site, 10/3/88.P. 308468-308471. The sampling information isattached.

201. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Progress Report Number 2, 10/4/88. P. 308472-308473.

202. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc., re: Splitsampling information provided during two telephoneconversations, 10/4/88. P. 308474-308482.

203. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulFikac, Jacobs Engineering Group Inc., re: Siteactivity report for the week of September 26, 1988,10/5/88. P. 308483-308485.

204. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulFikac, Jacobs Engineering Group Inc., re: Siteactivity report for the week of October 3, 1988,10/12/88. P. 308486-308489.

205. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc., re: Siteactivity report for the week of October 10, 1988,10/19/88. P. 308490-308493.

206. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Mr.Ronald Preston, U.S. EPA, re: Comments on the RI/FSWork Plan, 10/25/88. P. 308494-308494.

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207. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Monthly Progress Report Number 3, 11/3/88. P. 308495-308497.

208. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulS. Fikac, Jacobs Engineering Group Inc., re: Review ofthe final RI/FS Work Plan, 11/3/88. P. 308498-308502.

209. Handwritten telephone conversation record of Ms. L.Brunker, U.S. EPA, with Mr. Paul Fikac, JacobsEngineering Group, re: Delay of a letter report onQuality Assurance/Quality Control (QA/QC) audit,12/6/88. P. 308503-308503.


211. Letter to Mr. Gerardo Amador, U.S. EPA, from Mr. PaulJ. Fikac, Jacobs Engineering Group Inc., re: Summaryof split sample coordination for the ground watersampling program, 12/9/88. P. 308506-308509.

212. Handwritten notes, re: Ion exchange information, 1989.P. 308510-308510.


214. Record of communication of Mr. Paul Fikac, JacobsEngineering Group Inc., with Mr. Gerardo Amador, U.S.EPA, re: Review of RI data, 2/21/89. P. 308513-308513.

215. Record of communication of Mr. Paul Fikac, JacobsEngineering Group Inc., with Mr. Gerardo Amador, U.S.EPA, re: Raw sampling data for the RI, 3/1/89.P. 308514-308514.

216. Letter to Mr. Paul J. Fikac, Jacobs Environmental [sic]Group Inc., from Mr. Gerardo R. Amador, U.S. EPA, re:Raw analytical data for the RI/FS program and resultsof split sampling, 3/8/89. P. 308515-308516.

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217. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Monthly Progress Report Number 7, 3/10/89. .P. 308517-308518.

218. Letter to Mr. Paul J. Fikac, Jacobs Engineering GroupInc., from Mr. Gerardo R. Amador, U.S. EPA, re:Quality Assurance/Quality Control (QA/QC) audit onanalytical data, 3/15/89. P. 308519-308519.

219. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.A.B. Palmer, E.I. du Pont de Nemours & Company, Inc.,re: Outline of topics to be covered in a March 29,1989 meeting, 3/20/89. P. 308520-308520.

220. Letter to Mr. Gerardo Amador, U.S. EPA, from Roger T.Gresh, Woodward-Clyde Consultants, re: WetlandsInvestigation Report, 3/23/89. P. 308521-308522. Atransmittal letter dated March 23, 1989 regarding theWetlands Investigation Report is attached.

221. Du Pont-Newport Site Proposed RI/FS Schedule, 3/29/89.P. 308523-308523.

222. Handwritten memorandum to Ms. L. Boornazian, U.S. EPA,from Mr. Randy Sturgeon and Mr. Gerry Amador, U.S. EPA,re: Synopsis of a March 29, 1989 meeting, 3/29/89.P. 308524-308527.

223. Meeting attendance list, 3/29/89. P. 308528-308528.


225. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Paul J. Fikac, Jacobs Engineering Group Inc., re:Review comments on the RI raw data, 4/12/89.P. 308531-308609. The following are attached:

a) the review and comments on the RI raw data;

b) twenty-seven Data Summary Forms forVolatiles, Inorganics, BNAS, and Pesticidesand PCBs;

c) four Target Compound tables;

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d) a cross section location map;

e) a well inventory map;

f) a well inventory table;

g) a Data Management Summary Report for samplepoints AW01 to AW06;

h) a map of soil boring locations;

i) four soil boring cross section diagrams;

j) a Data Management Summary Report for samplepoints SCSI to SCS6;

k) a sediment sampling station map;

1) three Data Management Summary Reports forsample points RS01 to RS06, AS01 to AS06, andAS09;

m) a cross section diagram of Well A-A, Zinc andCadmium Concentrations;

n) a cross section diagram of Well B-B, Zinc andCadmium Concentrations;

o) a cross section diagram of Groundwater,Shallow Zone, Zinc and CadmiumConcentrations;

p) a cross section diagram of Groundwater,Intermediate Zone, Zinc and CadmiumConcentrations;

q) a cross section diagram of Groundwater, DeepZone, Zinc and Cadmium Concentrations;

r) a cross section diagram of Groundwater WellA-A, TCE and PCE Concentrations;

s) a cross section diagram of Groundwater WellB-B, TCE and PCE Concentrations;

t) a cross section diagram of Groundwater,Shallow Zone, TCE and PCE Concentrations;

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u) a cross section diagram of Groundwater,Intermediate Zone, TCE and PCEConcentrations;

v) a cross section diagram of Groundwater, DeepZone, TCE and PCE Concentrations;

w) a cross section diagram of Groundwater,Shallow Zone, Barium Concentrations;

x) a cross section diagram of Groundwater,Intermediate Zone, Barium Concentrations;

y) a cross section diagram of Groundwater,Shallow Zone, Zinc Concentrations;

z) a cross section diagram of Groundwater,Intermediate Zone, Zinc Concentrations;

aa) a cross section diagram of Groundwater,Shallow Zone, Cadmium Concentrations;

bb) a cross section diagram of Groundwater,Intermediate Zone, Cadmium Concentrations;

cc) a cross section diagram of Groundwater,Shallow Zone, Concentrations Contours;

dd) a cross section diagram of Groundwater,Intermediate Zone, Concentrations Contours;

ee) a Site Topography and Test Boring, Test Pitand Well Location Map;

ff) a Data Management Summary Report for samplepoints AW01 to AW06.

226. Memorandum to Mr. Gerardo Amador, U.S. EPA, from Ms.Alyce T. Fritz and Mr. Ron Preston, U.S. EPA, re:Comments on the Wetlands Investigation, 4/24/89.P. 308608-308612.

227. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Gerardo R. Amador, U.S. EPA,re: Suggested agenda for a May 2, 1989 meeting,4/27/89. P. 308613-208614. The suggested meetingagenda is attached.

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228. Handwritten memorandum from Mr. Mark Noll, re:Comments on ground water and contaminant flow, 5/89.P. 308615-308618.

229. Handwritten notes, re: Data sufficiency review, 5/89.P. 308619-308620.

230. Du Pont-Newport Site, Phase II, Remedial InvestigationSummary, 5/89. P. 308621-308632. Seven site maps areattached.

231. Memorandum to Mr. Gerry Aramador [sic], U.S. EPA, fromMr. Mark R. Noll, re: Comments on the RI/FS, DataSufficiency Memorandum, and a May 2, 1989 meeting,5/89. P. 308633-308633.

232. Letter to Mr. Gerardo R. Amador, U.S. EPA, from Mr.Roger T. Gresh, Woodward-Clyde Consultants, re:Monthly Progress Report Number 9, 5/1/89. P. 308634-308636. The Du Pont-Newport Site Proposed RI/FSSchedule dated March 29, 1989 is attached.


234. Letter Mr. Gerardo Amador, U.S. EPA, from Mr. Paul J.Fikac, Jacobs Engineering Group Inc., re: Finalcomments on the Data Sufficiency Memorandum for the RI,5/19/89. P. 308638-308641. Three sets of comments areattached.

235. Handwritten notes, re: Problems with the north andsouth landfills at the site, 6/89. P. 308642-308642.

236. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: MonthlyProgress Report Number 10, 6/8/89. P. 308643-308644.

237. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from AlyceT. Fritz, U.S. EPA, re: Comments on the Phase IIIWetlands Investigation Work Plan, 6/22/89. P. 308645-308646.

238. Letter to Dr. Alan B. Palmer, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Comments on the Phase III Wetlands Investigation WorkPlan, 6/27/89. P. 308647-308648.

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241. Telephone conversation record of Mr. Dean Radebaugh,U.S. EPA, with Ms. Annette Lage, Three RiversAnalytical Lab, re: Sampling data not received by EPA,8/11/89. P. 308653-308653.

242. Letter to Mr. Paul Fikac, Jacobs Engineering GroupInc., from Mr. Gerardo R. Amador, U.S. EPA, re:Various documents prepared by Woodward-Clyde to bereviewed by Mr. Fikac, 8/14/89. P. 308654-308654.

243. Letter to DNREC from Mr. Joseph J. Sasso, CIBA-GEIGYCorporation, re: Notification of the abandonment andremoval of underground storage tanks, 8/15/89.P. 308655-308661. Sampling results are attached.

244. Record of communication of Mr. Gerry Amador, U.S. EPA,with Mr. Randy Sturgeon, U.S. EPA, re: Explanation ofwhy the start of the Community Relations Plan for thesite was delayed, 8/30/89. P. 308662-308662.

245. Telephone conversation record of V. Pizzitola, U.S.EPA, with Ms. Doris Longby, Three Rivers AnalyticalLab, re: Data sampling concerning Du Pont Site,9/27/89. P. 308663-308663.

246. Facsimile cover sheet to Mr. Randy Sturgeon, U.S. EPA,from Mr. Roger Gresh, Woodward-Clyde Consultants, re:Transmittal of soils and water analyses methodologies,10/20/89. P. 308664-308666. An article entitled"Determination of Radium 228 In Water Samples" and anarticle entitled "Determination of Gamma EmittingRadioisotopes" are attached.


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248. Record of communication of Mr. Randy Sturgeon, U.S.EPA, with Mr. Al Palmer, E.I. du Pont de Nemours &Company, Inc., re: Request for information concerningthe site, 11/28/89. P. 308669-308669.

249. Record of communication of Mr. Randy Sturgeon, U.S.EPA, with Mr. Steve Johnson, DNREC, re: Informationconcerning stormwater discharges, 12/1/89. P. 308670-308670.

250. Memorandum to Mr. Steve Johnson, DNREC, from Mr. MikeApgar, DNREC, re: Conversation with John DeFriecesconcerning CIBA-GEIGY discharges to the ChristianaRiver, 12/1/89. P. 308671-308671.

251. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: A shipmentof photographs of the site, 12/12/89. P. 308672-308672.

252. Record of communication to file from Mr. RandySturgeon, U.S EPA, re: Conference call concerning theRisk Assessment and the Groundwater Sufficiency Data,12/29/89. P. 308673-308674. Handwritten notesconcerning the site are attached.

253. Memorandum to Mr. Bruce Beach, Dynamac Corporation,from Mr. Peter Woodman, Dynamac Corporation, re:Comments on the toxicity values presentation given by arepresentative of Woodward-Clyde, 12/29/89. P. 308675-308675.

254. Record of telephone conversation of Mr. Randy Sturgeon,U.S. EPA, with Mr. Roger Gresh, Woodward-ClydeConsultants, re: Wells in the area of the PotomacAquifer, 1/90. P. 308676-308676.

255. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Discussions on datasufficiency of ground water, 1/12/90. P. 308677-308677.

256. Newport Site Meeting Attendance List, 2/5/90.P. 308678-308682. Handwritten meeting notes and Figure1, Site Plan, are attached.

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257. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RickRingenwald, Dynamac Corporation, re: Transmittal ofPre-Screening Remedial Alternatives Review information,2/7/90. P. 308683-308686. A letter containinginformation on the Pre-Screening Remedial AlternativeReview is attached.

258. Data Package for Case Number 5097C, prepared by HunterServices Inc., 2/8/90. P. 308687-308778. A coverletter is attached.

259. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Ronald Preston, U.S. EPA, re: Work to be completed bythe contractor, 2/8/90. P. 308779-308780.

260. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Review of the Phase III datareport and comments on a discussion of theBioassessment Work Group concerning testing and siteactivities to be performed, 2/8/90. P. 308781-308782.

261. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Dave Seter, U.S. EPA, re: Comments on the drinkingwater section of the residential well sampling, 2/9/90.P. 308783-308783.

262. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted since January 10, 1990 and the scheduledactivities for February, 2/12/90. P. 308784-308785.

263. Report: Proposed Phase III Groundwater Investigation,Du Pont-Newport Site, Newport. Delaware, prepared byWoodward-Clyde Consultants, 2/14/90. P. 308786-308887.

264. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, -CIBA-GEIGY Corporation, re: NPDES MonitoringReport for January 1990, 2/28/90. P. 308888-308908.The report is attached.

265. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Rick Green, DNREC, re: Fish tissuetesting, 3/4/90. P. 308909-308909.

266. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted since February 12, 1990 and the scheduledactivities for March, 3/6/90. P. 308910-308911.

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267. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for February 1990, 3/27/90.P. 308912-308920. The report is attached.

268. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Conference call concerning thePhase III Wetlands activities, 4/6/90. P. 308921-308921.

269. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted since March 7, 1990 and the scheduledactivities for April, 4/10/90. P. 308922-308924.

270. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Reviewcomments on the data sufficiency response letter,4/10/90. P. 308925-308934. A proposed RI/FS scheduleis attached.

271. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.William W. Sutton, U.S. EPA, re: Review comments onthe Site Assessment Report, 4/19/90. P. 308935-308936.

272. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.William W. Sutton, U.S. EPA, re: Response to a summaryof the Site Assessment Report, 4/25/90. P. 308937-308938.

273. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Summary of a trip report,4/27/90. P. 308939-308939.

274. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for March 1990, 4/27/90.P. 308940-308962. The report is attached.

275. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Du Font's response to an April24, 1990 EPA letter concerning sampling and other siteactivities, 5/2/90. P. 308963-308963.

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276. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's comments on Component B of the draft Phase IIIWork Plan, 5/7/90. P. 308964-308968. Comments on thePhase III Wetlands Portion of the draft Work Plan areattached.

277. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Drilling procedures, 5/14/90.P. 308969-308969.

278. Memorandum to Mr. Victor Guide, U.S. EPA, from Mr.Randy Sturgeon, U.S. EPA, re: A Site EnvironmentalPhotographic Interpretation Center (EPIC) study of thesite wetlands from pre-1900 to the present, 5/17/90.P. 308970-308975. An EPIC Study, an EPIC AerialServices Request Form, and Figure 6-1, Locations ofGround Water Users, are attached.

279. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Ray Hinkle, Mr. Roger Gresh, Ms. Cindy Fuller, and Ms.Ceil Mancini, Woodward-Clyde Consultants, re: Summaryof a conference call discussing EPA's comments onmodeling, speciation programs, and testing to beperformed, 5/18/90. P. 308976-308976.

280. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for April 1990, 5/25/90.P. 308977-308984. The report is attached.

281. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Notificationof a delay in submitting the draft Human Health andEnvironmental Assessment Reports, 5/29/90. P. 308985-308986.

282. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Roger Gresh, Woodward-ClydeConsultants, re: Potential drilling contractors, 6/90.P. 308987-308987.

283. Telephone conversation record of Mr. Randy Sturgeon,U.S. EPA, with Mr. Frank Hannigan, CIBA-GEIGYCorporation, re: Survey of discharge points to theChristiana River, 6/1/90. P. 308988-308988.

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284. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Charles R. Porter, U.S. EPA, re: Review andinterpretation of the analytical results of samplesfrom the site, 6/4/90. P. 308989-308993.

285. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. FrankL. Hannigan, CIBA-GEIGY Corporation, re: Response tothe review of the draft Work Plan, 6/6/90. P. 308994-308994.

286. Memorandum to Mr. Eugene Meire, U.S. EPA, from Mr.Victor Guide, U.S. EPA, re: Request for EPIC support,6/7/90. P. 308995-308995.

287. Report: Draft, Human Health and EnvironmentalAssessment, Operable Unit 1, Du Pont-Newport Site,Newport, Delaware, prepared by Woodward-ClydeConsultants, 6/8/90. P. 308996-309123. A cover letteris attached.

288. Facsimile cover letter to Mr. Randy Sturgeon, U.S. EPA,from Mr. Bruce Beach, Dynamac Corporation, re: Draftoutline for sampling and drilling, 6/19/90. P. 309124-309128. The draft outline is attached.

289. Letter to Mr. Joe Kilby, DNREC, from Dr. John L.Deming, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for May 1990, 6/28/90.P. 309129-309137. The report is attached.

290. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Information supporting EPA's position that drilling mudshould not be introduced to the screened portion of thewell, 6/29/90. P. 309138-309139.

291. Handwritten notes, re: Sampling and well SM-4, 7/90.P. 309140-309140.


293. Letter to Mr. Tim Hill, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Comments on the review of the draft Human Health andEnvironmental Assessment, 7/6/90. P. 309142-309143.

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294. Letter to Mr. Joe Kilby, DNREC, from Dr. John L.Deming, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for June 1990, 7/18/90.P. 309144-309153. The report is attached.

295. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted since June 21, 1990 and the scheduledactivities for July, 7/19/90. P. 309154-309155.

296. Letter to Mr. Frank Hannigan, CIBA-GEIGY Corporation,from Mr. Roger T. Gresh, Woodward-Clyde Consultants,re: Proposed drilling procedures and well design forthe Potomac Formation wells, 7/19/90. P. 309156-309156.

297. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Tabulatedanalytical results from shallow soil sampling conductedat the proposed MW-34 well location, 7/23/90.P. 309157-309158. The soil analyses is attached.

298. Facsimile cover letter to Mr. Randy Sturgeon, U.S. EPA,from Mr. Roger Gresh, Woodward-Clyde Consultants, re:MW-34 background well location soil analyses, 7/28/90.P. 309159-309161. A Fill Horizon Soil Analyses tableand a letter dated July 23, 1990 regarding the MW-34well location are attached.

299. Notes for public meeting, re: Barium, cadmium, zinc,and lead, 8/90. P. 309162-309164.

300. Memorandum to Mr. Randy Sturgeon and Ms. Alyce Fritz,U.S. EPA, from Mr. Kevin Novo-Gradac, U.S. EPA, re:Methods for determining amorphous iron oxides, 8/3/90.P. 309165-309174. A facsimile cover sheet and a reportentitled "Determination of Sorbed Metals, Amorphic Fe,Oxidic Mn, and Reactive Particulate Organic Carbon inSediments and Soils" are attached.

301. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling progress report for June 25 through August 10,1990, 8/10/90. P. 309175-309176. A facsimile coversheet is attached.

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302. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Conference call discussingwater resources, 8/13/90. P. 309177-309177.

303. Memorandum to Mr. Bob Ambrose, U.S. EPA, from Mr. RandySturgeon, U.S. EPA, re: Sensitivity testing ofwetlands contamination, 8/15/90. P. 309178-309178.

304. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling progress report for the week ending August 17,1990, 8/17/90. P. 309179-309180. A facsimile coversheet is attached.

305. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: AlternateMW-34 locations for shallow soil analyses, 8/17/90.P. 309181-309185. A facsimile cover sheet, apreliminary soil analyses sheet, and a final soilanalyses sheet are attached.

306. Letter to Mr. Joe Kilby, DNREC, from Mr. John L.Deming, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for July 1990, 8/21/90.P. 309186-309215. The report is attached.

307. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling progress report for the week ending August 24,1990, 8/23/90. P. 309216-309217. A facsimile coversheet is attached.

308. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: Notification that Mr.Kalbacher has assumed the position of the SupportingAgency Coordinator, 8/28/90. P. 309218-309218.

309. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling program progress report for week ending August31, 1990, 8/30/90. P. 309219-309220. A facsimilecover sheet is attached.

310. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Additionalcomments on the draft Human Health and theEnvironmental Assessment, 9/6/90. P. 309221-309222.

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311. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling program progress report for the week endingSeptember 7, 1990, 9/7/90. P. 309223-309224. Afacsimile cover sheet is attached.

312. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during August and the scheduled activitiesfor September, 9/10/90. P. 309225-309228.

313. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling program progress report for the week endingSeptember 14, 1990, 9/14/90. P. 309229-309235. Thefollowing are attached:

a) a facsimile cover sheet;b) a geophysical well log for well TB-29;c) a graph tracking the porosity of well TB-29;d) a geophysical well log for well TB-34;e) a graph tracking the porosity of well TB-34.

314. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Dan Slizys, U.S. EPA, re: Organic Data Validation forCase 14442, 9/18/90. P. 309236-309332. The followingare attached:

a) the Organic Data Validation for Case 14442;

b) Appendix A, Glossary of Data Qualifiers;

c) Appendix B, Data Summary;

d) Appendix C, Results as Reported by theLaboratory for all Target Compounds;

e) Appendix D, Reviewed and CorrectedTentatively Identified Compounds;

f) Appendix E, Organic Regional Data AssessmentSummary;

g) Appendix F, Support Documentation.

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315. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling program progress report for the week endingSeptember 21, 1990, 9/21/90. P. 309333-309334. Afacsimile cover sheet is attached.

316. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Dan V. Slizys, U.S. EPA, re: Organic Data Validationfor Case 14552, 9/24/90. P. 309335-309419. Thefollowing are attached:








317. Report: Draft Scope of Work Not to Be Cited.Supplemental Phase III Wetlands Investigation. Du Pont-Newport Site, prepared by Woodward-Clyde Consultants,9/25/90. P. 309420-309446.

318. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Dan V. Slizys, U.S. EPA, re: Inorganic Data Validationfor Case 14442, 9/26/90. P. 309447-309468. The

. following are attached:

a) the Inorganic Data Validation for Case 14442;

b) Table 1A, Summary of Data Qualifiers on DataSummary after Data Validation;

c) Table IB, Codes used in Qualifiers Column;

d) Table 2, Glossary of Data Qualifier Codes;

e) Table 3, Data Summary Form;

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f) Appendix A, Results Reported by LaboratoryForm Inorganics;

g) Appendix B, TPO Report.

319. Report: Draft Scope of Work Not To Be Cited,Supplemental Phase III Wetlands Investigation, Du Pont-Newport Site, prepared by Woodward-Clyde Consultants,9/26/90. P. 309469-309491.

320. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for August 1990, 9/27/90.P. 309492-309512. The report is attached.

321. Data Package, Fish Tissue Analysis, 10/90. P. 309513-309515.









323. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling program progress report for the week endingOctober 5, 1990, 10/5/90. P. 309652-309653. Afacsimile cover sheet is attached.

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324. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Dan V. Slizys, U.S. EPA, re: Inorganic Data Validationfor Case 14604, 10/9/90. P. 309654-309673. Thefollowing are attached:
















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326. Memorandum to Ms. Roberta Riccio, U.S. EPA, fromPei-Fung Hurst, U.S. EPA, re: Toxicity of cobalt,10/9/90. P. 309692-309698. Information on the interimoral RfD and inhalation RfD for cobalt is attached.

327. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith U.S. EPA, re: Comments on the RiskAssessment, 10/12/90. P. 309699-309700.

328. Handwritten memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Buczala, Woodward-Clyde Consultants, re:Drilling program progress report for the week endingOctober 12, 1990, 10/12/90. P. 309701-309702. Afacsimile cover sheet is attached.

329. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Diane Wehner, Mr. Bob Davis, and Mr. Ron Preston, U.S.EPA, re: Comments on the draft Scope of Work for theSupplemental Phase III Wetlands Investigation,10/18/90. P. 309703-309705. A letter regardingcomments on the draft Scope of Work is attached.

330. Telephone log book, 10/29/90 - 1/28/92. P. 309706-309786.

331. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for September 1990,10/30/90. P. 309787-309809. The report is attached.

332. Revised ground water sampling schedule, 11/14/90.P. 309810-309812. A facsimile cover sheet is attached.

333. Letter to Mr. Joe Kilby, DNREC, from Mr. Joseph J.Sasso, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for October 1990, 11/28/90.P. 309813-309821. The report is attached.

334. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during November and the scheduled activitiesfor December, 12/12/90. P. 309822-309824.

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337. Letter to Mr. Joe Kilby, DNREC, from Mr. Mark A.Czerwinski, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for November 1990,12/27/90. P. 309915-309933. The report is attached.

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338. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during December 1990 and scheduledactivities for January 1991, 1/7/91. P. 309934-309936.

339. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JonCuizon, Dynamac Corporation, re: Dynamac's draftreview of the Environmental Evaluation, 1/8/91.P. 309937-309937.

340. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Diane E. Wehner, U.S. EPA, re: Comments on theOperable Unit 1 Environmental Assessment, 1/17/91.P. 309938-309940. A letter dated January 15, 1991regarding a review of the Environmental Assessment isattached.

341. Memorandum to Mr. Ben Blaney, U.S. EPA, from Mr. PeterLudzia, U.S. EPA, re: Request for START assistance for"in-situ" stabilization treatment, 1/23/91. P. 309941-309941.

342. Report: Waste Management Plan, Phase III RemedialInvestigation, Du Pont-Newport Site, Revision 0.Newport. Delaware, prepared by Woodward-ClydeConsultants, 1/24/91. P. 309942-310044.

343. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's comments on the draft Human Health andEnvironmental Assessment, 1/28/91. P. 310045-310048.

344. Letter to Mr. Joe Kilby, DNREC, from Mr. Mark A.Czerwinski, CIBA-GEIGY Corporation, re: NationalPollutant Discharge Elimination System (NPDES)Monitoring Report for December 1990, 1/28/91.P. 310049-310057. The report is attached.

345. Memorandum to Mr. Peter Ludzia, U.S. EPA, from Mr. NormKulujian, U.S. EPA, re: A meeting discussing regularassistance to evaluate responsible party technology,1/29/91. P. 310058-310058.

346. Report: Site Analysis. Du Pont-Newport Site, NewportDelaware. Volume I, prepared by The BioneticsCorporation, 2/91. P. 310059-310108.

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347. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: The February 14, 1991 meeting and presentation ofDu Font's research and development work, 2/7/91.P. 310109-310110. An envelope is attached.

348. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during January 1991 and scheduled activitiesfor February 1991, 2/9/91. P. 310111-310114.

349. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Michael Buchman, U.S. Department of Commerce, re:Request for review of the revised draft PreliminaryNatural Resource Survey, 2/12/91. P. 310115-310115.

350. Telephone conversation record of Mr. Pete Chapman, U.S.EPA, with Mr. Randy Sturgeon, U.S. EPA, re: Samplesexceeding a 10-day Chemical Health Advisory, 2/13/91.P. 310116-310117. A map of sampling locations isattached.

351. Seminar Notice Memorandum, re: Chemical Fate Modelingand measurement of absorption or organics in clay,2/14/91. P. 310118-310118.

352. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Inorganic DataValidation for Case 15324, 2/14/91. P. 310119-310146.The following are attached:


b) Table 1A, Summary of Qualifiers on DataSummary After Data Validation;

c) Table IB, Codes Used in Comments Column;


e) Table 3, Samples Exceeding the HealthAdvisory Levels;

f) Table 4, Data Summary Form Inorganics;

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g) Appendix A, Results Repeated by LaboratoryForm Inorganics;

h) Appendix B, TPO Report.

353. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: EPA'scomments on the RI/FS Work Plan, 2/19/91. P. 310147-310147.

354. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Theresa A. Simpson, U.S. EPA, re: Organic DataValidation for Case 15334, 2/20/91. P. 310148-310292.The following are attached:



c) Appendix B, Data Summary Forms;

d) Appendix C, Results as Reported by theLaboratory for All Target Compounds;




355. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Project schedule, 2/26/91. P. 310293-310294.

356. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: EPA1scomments on the draft Human Health EnvironmentalAssessment and EPA's Risk Assessment workshop, 2/27/91P. 310295-310296.

357. Letter to Mr. Joe Kilby, DNREC, from Dr. John L.Deming, CIBA-GEIGY Corporation, re: NPDES MonitoringReport for January 1991, 2/28/91. P. 310297-310305.The report is attached.

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358. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:List of references requested at the February 20, 1992Ecological Risk Assessment meeting, 3/4/91. P. 310306-310307. The list of references is attached.

359. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during February 1991 and scheduled activitiesfor March 1991, 3/8/91. P. 310308-310310.

360. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Approval of a schedule for completion of the RI/FS,3/18/91. P. 310311-310313. The schedule is attached.

361. Letter to Mr. Joe Kilby, DNREC, from Dr. John L.Deming, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for February 1991, 3/25/91.P. 310314-310332. The report is attached.

362. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: Issues raised in a letterdated March 22, 1991 concerning incorporation of theground water component into the Human HealthEvaluation, 3/28/91. P. 310333-310334.

363. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during March 1991 and scheduled activitiesfor April 1991, 4/10/91. P. 310335-310337,

364. Letter to Mr. Joe Kilby, DNREC, from Dr. John L.Deming, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for March 1991, 4/16/91.P. 310338-310346. The report is attached.

365. Report: Physical Characterization of Outfall PipelineDischarges to the Christina River at the Newport Works.Newport. Delaware, prepared by S.T. Hudson Engineers,Inc., 5/19/91. P. 310347-310467.

366. Letter to Mr. Joe Kilby, DNREC, from Mr. Ken Gagon,CIBA-GEIGY Corporation, re: NPDES Monitoring Reportfor April 1991, 5/28/91. P. 310468-310476. The reportis attached.

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367. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert Davis and Mr. Ronald Preston, U.S. EPA, re:Comments on the supplemental Phase III RI tasks, 6/91.P. 310477-310478.

368. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Nancy L. Cichowicz, U.S. EPA, re: Review of the PhaseIII RI Data Sufficiency Report, 6/7/91. P. 310479-310479.

369. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. DavidH. Lerner, DNREC, re: Underground storage tankactivities, 6/10/91. P. 310480-310483. A DNRECUnderground Storage Tank Registration Form is attached.

370. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Proposed input data for the Human HealthEvaluation, 6/10/91. P. 310484-310492. Toxicityprofiles for cobalt and lead are attached.

371. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during May 1991 and scheduled activities forJune 1991, 6/10/91. P. 310493-310494.

372. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith, U.S. EPA, re: Response to issues raisedin a letter dated June 10, 1991 concerning nickel,cobalt, and lead, 6/11/91. P. 310495-310503. Amemorandum dated October 9, 1990 regarding the toxicityof cobalt is attached.

373. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: EPA's response to the proposed input data for theHuman Health Evaluation, 6/17/91. P. 310504-310505.

374. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Aconversation of Mr. Randy Sturgeon, Mr. Joel Karmazyn,Mr. J. Roetzer, and Mr. Roger Gresh concerning theHuman Health Evaluation, 6/20/91. P. 310506-310507.

375. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, Du Pont Environmental RemediationServices, re: Fencing of the north drainage ditchdepression, 6/24/91. P. 310508-310508.

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376. Letter to Mr. Joe Kilby, DNREC, from Mr. D. KennethGagon, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for May 1991, 6/26/91.P. 310509-310517. The report is attached.

377. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlKalbacher, DNREC, re: Classification of the ColumbiaFormation Aquifer near the site, 6/28/91. P. 310518-310519.

378. Report: Data Sufficiency Report Review, prepared byDynamac Corporation, 7/1/91. P. 310520-310554. Acover letter is attached.

379. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during June 1991 and scheduled activities forJuly 1991, 7/2/91. P. 310555-310557.

380. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Diane E. Wehner, U.S. EPA, re: Review of the Phase IIIRemedial Investigation Data Sufficiency Report, 7/2/91.P. 310558-310561.

381. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Proposedcobalt reference dose and proposed lead action levelsfor use in the Human Health Evaluation, 7/10/91.P. 310562-310566.

382. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: A letterconcerning the Phase III Data Sufficiency Report sentby EPA to Woodward-Clyde Consultants but not to DuPont, 7/12/91. P. 310567-310568.

383. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert Davis, U.S. EPA, re: Additional comments on thePhase III RI Data Sufficiency Report, 7/15/91.P. 310569-310570.

384. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Fred Sturniolo, U.S. EPA, re: Classification of theColumbia Formation Aquifer System, 7/16/91. P. 310571-310572.

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385. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, Du Pont Environmental RemediationServices, re: Explanation of why Du Pont will notsubmit a scope of work for the Remedial TreatabilityStudy Assessment, 7/17/91. P. 310573-310574.

386. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Mary Beck, U.S. EPA, re: Analysis of the proposed low-permeability cover system, 7/22/91. P. 310575-310576.

387. Letter to Mr. Joe Kilby, DNREC, from Mr. D. KennethGagon, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for June 1991, 7/27/91.P. 310577-310585. The report is attached.

388. Report: Environmental Evaluation Draft RiskAssessment. Du Pont-Newport Site. Newport, Delaware,Volume 2 of 2, prepared by Woodward-Clyde Consultants,7/30/91. P. 310586-310779.

389. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerGresh, Woodward-Clyde Consultants, re: Activitiesconducted during July 1991 and scheduled activities forAugust 1991, 8/9/91. P. 310780-310782.

390. Letter to Mr. Joe Kilby, DNREC, from Mr. D. KennethGagon, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for July 1991, 8/27/91.P. 310783-310791. The report is attached.

391. Memorandum to Mr. Bob Davis, U.S. EPA, from Ms. DianeE. Wehner, U.S. EPA, re: Review of the draft RiskAssessment, 8/29/91. P. 310792-310794.

392. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, E.I. du Pont de Nemours & Company, Inc.,re: Request for a meeting to clarify theclassification of the Columbia Aquifer, 9/5/91.P. 310795-310795.

393. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Bob Davis, U.S. EPA, re: Comments on the draft RiskAssessment, 9/5/91. P. 310796-310800. A memorandumdated August 29, 1991 regarding comments on the draftRisk Assessment is attached.

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394. Memorandum to Mr. Karl Kalbacher, DNREC, from Mr. RoyW. Miller, DNREC, re: Review of the draft RiskAssessment, 9/6/91. P. 310801-310801.

395. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's review of the draft Risk Assessment, 9/10/91.P. 310802-310804.

396. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during August 1991 and scheduled activitiesfor September 1991, 9/10/91. P. 310805-310807.

397. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlKalbacher, DNREC, re: Review of the draft RiskAssessment, 9/11/91. P. 310808-310809.

398. Meeting Agenda, 9/24/91. P. 310810-310812. A remedialprocess diagram and a list of attendees are attached.

399. Meeting Agenda, 9/24/91. P. 310813-310816. A remedialprocess diagram and charts of the Columbia Formationreceptors and Potential Areas of Interest are attached.

400. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: The October 1, 1991 meeting concerningclassification of the Columbia Formation Aquifer,9/27/91. P. 310817-310818.

401. Letter to Mr. Joe Kilby, DNREC, from Mr. D. KennethGagon, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for August 1991, 9/27/91.P. 310819-310827. The report is attached.

402. Information on guidance/regulations for a ground watermeeting, 10/1/91. P. 310828-310836. Information onground water protection strategy and an excerpt formthe Federal Register are attached.

403. List of attendees from a ground water classificationmeeting, 10/1/91. P. 310837-310844. The following areattached:

a) a draft chart of potential areas of interest;

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b) a draft chart of Columbia Formation groundwater receptors;

c) Figure 2, Site Area - 1987;

d) Figure 26, Piezometric Surface Map, ShallowZone and Columbia Wells, Fill/OtherQuaternary Zone, High Tide - 12/11/90;

e) Figure 24, Groundwater Flow Directions,Shallow Zone and Columbia Wells, Fill/OtherQuaternary Zone, High Tide - 12/11/90;

f) Figure 25, Piezometric Surface, Shallow Zoneand Columbia Wells, Fill/Other QuaternaryZone, Low Tide - 12/11/90;

g) Figure 25, Groundwater Flow Directions,Shallow Zone and Columbia Wells, Fill/OtherQuaternary Zone, Low Tide - 12/13/90.

404. Letter to Mr. Peter Ludzia, U.S. EPA, from Mr. P.Brandt Butler, E.I. du Pont de Nemours & Company, Inc.,re: Request for EPA to reconsider their position onthe classification of the Columbia Aquifer, 10/1/91.P. 310845-310849. Information concerning theclassification and a copy of the relevant guidance areattached.

405. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during September 1991 and scheduledactivities for October 1991, 10/9/91. P. 310850-310852.

406. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Minutes of October 1, 1991 meeting concerning theColumbia Formation Aquifer classification, 10/9/91.P. 301853-310856. A ground water classification flowchart is attached.

407. Report: Human Health Evaluation, Draft RiskAssessment, Du Pont-Newport Site. Newport, Delaware.Volume 1 of 2, prepared by Woodward-Clyde Consultants,10/14/91. P. 310857-311387. A cover letter isattached.

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408. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. CeilMancini and Mr. Roger T. Gresh, Woodward-ClydeConsultants, re: Response to EPA's comments on theEcological Risk Assessment, 10/14/91. P. 311388-311406. A letter dated September 25, 1991 regardingendangered species comments and a letter dated October11, 1991 regarding an inventory of threatened andendangered species are attached.

409. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy Smith, U.S. EPA, re: Discrepancies in Du Font'sminutes of the October 1, 1991 meeting, 10/28/91.P. 311407-311407.

410. Letter to Mr. Joe Kilby, DNREC, from Dr. John Deming,CIBA-GEIGY Corporation, re: NPDES Monthly DischargeMonitoring Report for September 1991, 10/28/91.P. 311408-311416. The report is attached.

411. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. FrankL. Hannigan, CIBA-GEIGY Corporation, re: Copies of theMonthly Discharge Monitoring Reports from January 1990to October 1991, 10/29/91. P. 311417-311417.

412. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's rational for its classification of the ColumbiaFormation Aquifer, 11/1/91. P. 311418-311421.

413. Report: Draft Remedial Investigation Report. Du Font-Newport Site. Newport. Delaware, Volume 1 of 2,prepared by Woodward-Clyde Consultants, 11/1/91.P. 311422-311590. Two transmittal letters areattached.

414. Report: Draft Remedial Investigation Report. Du Pont-Newport Site. Newport, Delaware. Volume 2 of 2,prepared by Woodward-Clyde Consultants, 11/1/91.P. 311591-311890.

415. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Letter reportof technical review comments on the Risk Assessment,11/6/91. P. 311891-311899. The report is attached.

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416. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during October 1991 and scheduled activitiesfor November 1991, 11/8/91. P. 311900-311902.

417. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Nancy L. Cichowicz, U.S. EPA, re: Hydrogeologic reviewof Appendix D of the draft Risk Assessment, 11/13/91.P. 311903-311904.

418. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: Review of the draft RiskAssessment, 11/15/91. P. 311905-311920. A draftreport entitled "Guidance on the Use of Models" isattached.

419. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith, U.S. EPA, re: EPA's comments on thedraft Risk Assessment, 11/18/91. P. 311921-311923.

420. List of attendees, Feasibility Study Meeting, 11/27/91.P. 311924-311924.

421. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Technicalcomments on the draft Remedial Investigation Report,11/27/91. P. 311925-311938.

422. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's comments on the Human Health Risk Assessment,12/2/91. P. 311939-311943.

423. Letter to Mr. Joe Kilby, DNREC, from Dr. John Deming,CIBA-GEIGY Corporation, re: NPDES Monthly DischargeMonitoring Report for October 1991, 12/2/91.P. 311944-311952. The report is attached.

424. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Review of the draftRemedial Investigation Report, 12/5/91. P. 311953-311955.

425. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Activitiesconducted during November 1991 and scheduled activitiesfor December 1991, 12/6/91. P. 311956-311957. Thereport is attached.

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426. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Nancy L. Cichowicz, U.S. EPA, re: Comments on thedraft Remedial Investigation Report, 12/6/91.P. 311958-311959.

427. Letter to Dr. H. Ronald Preston, U.S. EPA, from Mr.John P. Wolflin, U.S. Department of the Interior, re:Review of the Remedial Investigation Report, 12/9/91.P. 311960-311965. A letter dated September 10, 1991regarding comments on the draft Volume 2 of the RiskAssessment is attached.

428. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Robert S. Davis, U.S. EPA, re: Additionalcomments on the draft Remedial Investigation Report,12/11/91. P. 311966-311967.

429. Review of the draft Remedial Investigation Report,prepared by U.S. EPA, 12/12/91. P. 311968-311972.

430. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: EPA's comments on the HumanHealth Risk Assessment, 12/13/91. P. 311973-312000.The following are attached:

a) a letter regarding EPA's comments on theHuman Health Evaluation Report, datedDecember 12, 1991;

b) a letter regarding DNREC's review of thedraft Risk Assessment, dated November 15,1991;

c) Guidance on the Use of Models, dated July1991;

d) a letter regarding ground waterclassification, dated November 1, 1992.

431. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Comments on the draft Remedial Investigation, 12/16/91.P. 312001-312004.

432. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: DNREC's comments on the draftRemedial Investigation Report, 12/18/91. P. 312005-312007.

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433. Report: Draft Focused Feasibility Study. Du Pont-Newport Site, Newport, Delaware, prepared by Woodward-Clyde Consultants, 12/23/91. P. 312008-312105. Twocover letters are attached.

434. Letter to Mr. Joe Kilby, DNREC, from Dr. John Deming,CIBA-GEIGY Corporation, re: NPDES Monthly DischargeMonitoring Report for November 1991, 12/26/91.P. 312106-312114. The report is attached.

435. Report: Draft Du Pont-Newport Site Review - Review ofEcological Concerns, prepared by Dynamac Corporation,12/31/91. P. 312115-312178.

436. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Response toEPA's review comments on the draft Human HealthEvaluation, 1/2/92. P. 312179-312181.

437. Memorandum to Mr. Bob Davis, NOAA, from Ms. Diane E.Wehner, NOAA, re: Comments on the draft FeasibilityStudy, 1/2/92. P. 312182-312184.


439. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy Smith, U.S. EPA, re: Comments on the FocusedFeasibility Study, 1/10/92. P. 312187-312187.

440. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Response toEPA's review comments on the draft RI, 1/13/92.P. 312188-312195. A map of soil boring and welllocations is attached.

441. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Comments on the site,1/13/92. P. 312196-312197.

442. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy Smith, U.S. EPA, re: Comments on the Human HealthEvaluation to be addressed by Woodward-ClydeConsultants, 1/14/92. P. 312198-312198.

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443. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy Smith, U.S. EPA, re: DNREC's position on aquiferclassification, 1/17/92. P. 312199-312199.

444. Letter to Mr. Joe Kilby, DNREC, from Dr. John Deming,CIBA-GEIGY Corporation, re: NPDES Discharge MonitoringReport for December 1991, 1/21/92. P. 312200-312208.The report is attached.

445. Memorandum to Mr. Bob Ambrose, U.S. EPA, from Mr. RandySturgeon, U.S. EPA, re: Request for speciationmodeling to be performed on wetlands, 1/22/92.P. 312209-312224. The following are attached:

a) information on river and wetland sediments;

b) information on the north disposal sitewetlands;

c) Table 1, Sampling Plan;

d) Table 2, Summary of Wetland InvestigationSurface Water and Sediment Sample Locations;

e) Table 3, Surface Water Field ParameterMethods;

f) Table 4, Field Parameters for Wetland SurfaceWater Samples;

g) Table 5, Summary of Analytical Results forTotal Metals in Non-Filtered Surface Water,North Disposal Site;

h) Table 6, Summary of Analytical Results forDissolved Metals in Filtered Surface Water;

i) Table 7, Summary of Analytical Results forTotal Metals in Non-Filtered Surface Water,South Disposal Site;

j) Table 8, Physical Properties and OrganicContents of Wetland Sediment Samples;

k) Table 9, Chemical Analyses Summary of theChristiana River Sediment;

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1) Table 10, Chemical Analyses Summary of theNorth Disposal Site Sediment;

m) Table 11, Chemical Analyses Summary of theSouth Disposal Site Sediment;

n) Table 12, Summary of the Analytical Resultsfor Total Metals in Amorphous Iron Extracts.

446. Telephone log book, 1/29/92 - 10/1/92. P. 312225-312293.

447. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JohnCuizon, Dynamac Corporation, re: Ecological impacts atthe site, 1/29/92. P. 312294-312295.


449. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlKalbacher, DNREC, re: DNREC's review of the draftFeasibility Study, 2/10/92. P. 312299-312302.

450. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Review of theFeasibility Study, 2/10/92. P. 312303-312320. Thefollowing are attached:

a) Attachment 1, General Comments;

b) Attachment 2, Specific Comments;

c) Attachment 3, Summary;

d) Attachment 4, a magazine article entitled"Dual vacuum extraction sinks below thesurface in groundwater cleanup."

451. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: A February 4, 1992 meetingbetween EPA and DNREC concerning outstanding issuesrelated to the RI/FS, 2/10/92. P. 312321-312324. Themeeting report is attached.

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452. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Clarification of EPA's comments on the Human HealthEvaluation, the Environmental Evaluation, and the RI,2/11/92. P. 312325-312366. The following areattached:

a) EPA comments on the Remedial InvestigationReport;

b) EPA comments on the Environmental Evaluation;

c) EPA comments on the Focused FeasibilityStudy;

d) a graph of barium concentrations;

e) a graph of chromium concentrations;

f) a graph of mercury concentrations;

g) a graph of zinc concentrations;

h) a magazine article entitled "Sediment QualityTriad: Measures of Sediment Contamination,Toxicity and Infaunal Community Compositionin Puget Sound;"

i) a magazine article entitled "Dual vacuumextraction sinks below the surface ingroundwater cleanup."

453. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc. , from Mr. Randy Sturgeon, U ..S. EPA, re:Transmittal of missing attachments from the FS,2/13/92. P. 312367-312372. Five telephoneconversation records dated May 2, 1991 of discussionswith residents concerning the use of well water areattached.

454. Facsimile cover sheet to Mr. Kevin Novo-Gradac, U.S.EPA, from Mr. Randy Sturgeon, U.S. EPA, re: Sitehistory, 2/18/92. P. 312373-312373.

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455. Facsimile cover sheet to Mr. Randy Sturgeon, U.S. EPA,from Mr. Kevin Novo-Gradac, U.S. EPA, re: Draft copyof zinc modeling results, 2/21/92. P. 312374-312380.A memorandum regarding metal speciation modeling of DuPont-Newport data and three unlabeled graphs areattached.

456. Report: Du Pont Responses to EPA's February 11. 1992Comments Regarding the Human Health Evaluation (HHE).Environmental Evaluation (EE). RI. and FS Reports. DuPont-Newport Superfund Site, prepared by Woodward-ClydeConsultants, 2/24/92. P. 312381-312400. A letterdated October 3, 1991 regarding the schedule for theRI/FS is attached.

457. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Acknowledgement of receipt of EPA's RI/FS commentletter, 2/24/92. P. 312401-312420. A report regardingDu Pont's responses to EPA's comments is attached.

458. Sign-in sheet for Du Pont/DNREC/EPA Meeting, 2/25/92.P. 312421-312421.

459. Trip Report, prepared by Mr. Merv Harris, 2/28/92.P. 312422-312422.

460. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Review ofloading calculations, 2/28/92. P. 312423-312427.Comments on calculations for the migration of metals tothe Christiana River are attached.

461. Handwritten memorandum to Ms. Carol Macbeth from Mr.Mike Urz, re: Extent of barium quantities in theChristiana River watershed, 2/29/92. P. 312428-312492.The following are attached:

a) a report on the use of the sediment qualitytriad in the classification of sedimentcontamination;

b) a report on the revised water qualitycriteria for the protection of aquatic life;

c) a table of wetland investigation of surfacewater and sediment sample locations;

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d) a summary of aluminum concentrations;

e) information on the constituents of concern;

f) information on the contaminants of concern;

g) a letter regarding Du Font's receipt of EPA'scomments on the RI/FS, dated February 24,1992;

h) Du Font's responses to EPA's commentsregarding the Human Health Evaluation,Environmental Evaluation, RemedialInvestigation, and Feasibility Study;

i) a Proposed Document Submittal and ApprovalSchedule.

462. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. MarkA. Czerwinski, CIBA-GEIGY Corporation, re: NPDESMonthly Discharge Monitoring Report for January 1992,3/3/92. P. 312493-312503. A letter dated February 29,1992 regarding the Discharge Report and the report areattached.

463. Facsimile cover sheet to Mr. Randy Sturgeon, U.S. EPA,from Ms. C. Macbeth, Dynamac Corporation, re:Background information on Du Pont's use of the sedimentquality triad, 3/4/92. P. 312504-312507. A report onthe sediment triad analysis is attached.

464. Sign-in sheet for Du Pont-Newport meeting, re:Discussion of outstanding ecological issues, 3/5/92.P. 312508-312508.

465. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: A Du Pont meetingregarding the sediment triad, 3/9/92. P. 312509-312511. A memorandum dated March 10, 1992 regardingtypographical errors on a message and a memorandumdated March 13, 1992 regarding a conference call areattached.


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467. Sign-in sheet, EPA - Du Pont Hydrogeology Workshop,3/10/92. P. 312514-312527. The following areattached:

a) a flow chart of ground water (GW) restorationremedial action objectives;

b) a flow chart of ground water (GW) containmentremedial action objectives;

c) a flow chart of Christiana River sedimentrestoration remedial action objectives;

d) a flow chart of wetlands sediment restorationremedial action objectives;

e) flush time calculations for barium sulfate;

f) a list of flush time calculations;

g) a hand-drawn diagram illustrating flow;

h) a rule sheet;

i) a variable sheet;

j) a graph of flush time;

k) a chart of flush time and exitconcentrations;

1) a chart of ground water major ion chemistry;

m) a list of conclusions.

468. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. CeilMancini, Woodward-Clyde Consultants, re: Summary of aMarch 12, 1992 telephone conversation concerning theresolution of the sediment quality triad, 3/13/92.P. 312528-312529.

469. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. CeilMancini, Woodward-Clyde Consultants, re: Finalresolution of the sediment quality triad, 3/17/92.P. 312530-312535. A revised table of contents for theEnvironmental Evaluation is attached.

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470. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesP. Buczala, Woodward-Clyde Consultants, re: Submittalof updated pages of the Human Health Evaluation,6/11/92. P. 312536-312541. The revised pages areattached.

471. Report: Final Report Human Health Evaluation, RiskAssessment, Du Font-Newport Site. Newport, Delaware.Volume 1 of 2, prepared by Woodward-Clyde Consultants,3/18/92. P. 312542-313059.

472. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's comments on a Woodward-Clyde letter concerningthe Environmental Evaluation, 3/19/92. P. 313060-313061.

473. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's responses to Du Font's comments on the HumanHealth Evaluation, the Environmental Evaluation, theRI, and the FS, 3/20/92. P. 313062-313065.

474. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. MarkA. Czerwinski, CIBA-GEIGY Corporation, re: NPDESMonthly Discharge Monitoring Report for February 1992,3/25/92. P. 313066-313075. A letter dated March 27,1992 regarding the NPDES Discharge Monitoring Reportand the report are attached.

475. Memorandum to Mr. Bob Ambrose, U.S. EPA, from Mr. RandySturgeon, U.S. EPA, re: MINETAQ modeling results ofzinc, 4/6/92. P. 313076-313076.

476. Letter to Ms. Joan Armstrong, U.S. EPA, from Mr. JosephT. Wutka, Delaware Department of Transportation, re:Basin Road boring data, 4/6/92. P. 313077-313077.

477. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith, U.S. EPA, re: Second review of the RiskAssessment, 4/8/92. P. 313078-313078.


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479. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Killer, DNREC, re: The final Human HealthEvaluation Report, 4/14/92. P. 313083-313085.

480. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Notification of a change of theDNREC project manager, 4/16/92. P. 313086-313086.

481. Letter to Mr. Joseph Wutka, Delaware Department ofTransportation, from Ms. Joan Armstrong, U.S. EPA, re:Request for maps of Basin Road, 4/23/92. P. 313087-313087.

482. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith, U.S. EPA, re: Potential risks fromresidential use of Potomac Formation ground water,4/27/92. P. 313088-313090. A table of estimated upperbound excess lifetime cancer risks and hazard quotientsis attached.

483. Letter to Mr. Joe Kilby, DNREC, from Dr. John Deming,CIBA-GEIGY Corporation, re: NPDES Monthly DischargeMonitoring Report for March 1992, 4/28/92. P. 313091-313111. The following are attached:

a) the Discharge Monitoring Report;

b) sampling results;

c) Order Custody Forms for laboratory numbersBD-26455, BD-26462, and BD-26463;

d) Acute Screening Studies Data Sheets forsample numbers BD-26455-6, BD-26462, andBD-26463-6.

484. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Review comments on the Human Health Evaluation,4/28/92. P. 313112-313113.

485. Report: Environmental Evaluation. Risk Assessment. DuPont-Newport Site. Newport. Delaware. Volume 2 of 2,prepared by Woodward-Clyde Consultants, 4/29/92.P. 313114-313414.

116

486. Letter to Mr. Wayne Walters, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Proposedremedial approach, 5/4/92. P. 313415-313417. A tableof the proposed remedial program is attached.

487. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Response to EPA's comments on the final HumanHealth Assessment, 5/5/92. P. 313418-313420.

488. Letter to Ms. Anne Killer, DNREC, from Mr. RandySturgeon, U.S. EPA, re: EPA's response to DNREC'scomments on the Human Health Evaluation, 5/6/92.P. 313421-313430. The following are attached:

a) a memorandum regarding potential risks fromresidential use of Potomac Formation groundwater, dated April 27, 1992;

b) a table of estimated upper bound excesslifetime cancer risks and hazard quotients;

c) a memorandum regarding the revised HumanHealth Evaluation, dated May 6, 1992;

d) two telephone conversation records regardingdiscussions with residents about the use ofwell water, dated May 2, 1991.

489. Letter to Ms. Anne Hiller, DNREC, from Mr. RandySturgeon, U.S. EPA, re: Request for State Applicableor Relevant and Appropriate Requirements (ARARs),5/6/92. P. 313431-313431.


491. Facsimile cover sheet to Mr. Randy Sturgeon, U.S. EPA,from Ms. Carol Macbeth, Dynamac Corporation, re: Areference used by Du Pont, 5/11/92. P. 313434-313462.A report on contaminated marine sediments assessmentand remediation is attached.

117

492. Facsimile cover sheet to Mr. Roger Gresh, Woodward-Clyde Consultants, from Mr. Randy Sturgeon, U.S. EPA,re: Transmittal of information to be reviewed by theNatural Resource Trustee, 5/14/92. P. 313463-313464.A list of names, addresses, and telephone numbers isattached.

493. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JonCuizon, Dynamac Corporation, re: Report of findingsand conclusions from the March 11, 1992 on-site fieldinvestigation, 5/22/92. P. 313465-313475. A sitevisit report, site visit notes, and site photographsare attached.

494. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Killer, DNREC, re: DNREC's receipt of theEnvironmental Evaluation, 5/26/92. P. 313476-313476.

495. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. CarolMacbeth, Dynamac Corporation, re: Review of therevised Environmental Evaluation, 5/27/92. P. 313477-313485. Dynamac's review of Du Pont's response to EPAcomments and the revised Environmental Evaluation areattached.

496. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. FrankL. Hannigan, CIBA-GEIGY Corporation, re: Transmittalof the April 1992 Monthly Discharge Monitoring Reportand the amendment to March 1992 Monthly DischargeReport, 5/28/92. P. 313486-313497. The following areattached:

a) a letter regarding the NPDES MonthlyDischarge Monitoring Report for March 1992,dated May 28, 1992;

b) the Discharge Report for May 1992;

c) a letter regarding transmittal of the NPDESMonthly Discharge Monitoring Report for April1992, dated May 28, 1992;

d) the Discharge Report for April 1992.

497. Report: Focused Feasibility Study. Du Pont-NewportSite, Newport, Delaware, Volume 1 of 2, prepared byWoodward-Clyde Consultants, 5/28/92. P. 313498-313762.Two cover letters are attached.

118

498. Report: Focused Feasibility Study, Du Pont-NewportSite, Newport. Delaware, Volume 2 of 2. prepared byWoodward-Clyde Consultants, 5/28/92. P. 313763-314130.

499. Report: Final Remedial Investigation Report. Du Font-Newport Site, Newport, Delaware, Volume 1 of 2.prepared by Woodward-Clyde Consultants, 5/28/92.P. 314131-314364. Two cover letters are attached.

500. Report: Remedial Investigation Report. Du Pont-NewportSite, Newport. Delaware, Volume 2 of 2, prepared byWoodward-Clyde Consultants, 5/28/92. P. 314365-314721.

501. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneKiller, DNREC, re: List of state ARARs, 6/1/92.P. 314722-314725. The ARARs list is enclosed.

502. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms.Maryann J. Nicholson, Du Pont Environmental RemediationServices, re: Classification .of EPA's comments on theHuman Health Evaluation, 6/3/92. P. 314726-314726.

503. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneHiller, DNREC, re: DNREC's comments on theEnvironmental Evaluation Report, 6/5/92. P. 314727-314730.


505. Memorandum to Mr. Bob Davis, U.S. EPA, from Ms. EvelynMacKnight, U.S. EPA, re: EPA's comments on the RiskAssessment, 6/9/92. P. 314733-314733.

506. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JonCuizon, Dynamac Corporation, re: Dynamac's review ofthe revised Environmental Evaluation Risk Assessment,6/10/92. P. 314734-314751. The comments on theEnvironmental Evaluation Risk Assessment, a memorandumdated June 10, 1992 regarding discharges of metals inground water, and an excerpt from the EnvironmentalEvaluation are attached.

507. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesP. Buczala, Woodward-Clyde Consultants, re: Updatedpages for the final Human Health Evaluation, 6/11/92.P. 314752-314756. The updated pages are attached.

119

508. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Comments on theEcological Risk Assessment, 6/11/92. P. 314757-314759.

509. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: DNREC's comments on the RI,6/15/92. P. 314760-314760.

510. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Dynamac'sreview of the RI, 6/18/92. P. 314761-314768. A listof inadequately addressed comments and a list ofadequately addressed comments are attached.

511. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. FrankL. Hannigan, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for May 1992, 6/26/92.P. 314769-314778. The report is attached.

512. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Nancy Cichowicz, U.S. EPA, re: Additional comments onVolumes 1 and 2 of the revised RI, 6/29/91. P. 314779-314779.

513. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on the RI and the FSreports, 6/30/92. P. 314780-314785. A PotentiometricHead Contours diagram is attached.

514. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:EPA's comments on the Environmental Evaluation RiskAssessment, 7/1/92. P. 314786-314790.

515. Attachment 1, Evaluation of Responses to EPA Commentsof July 1, 1992, prepared by Dynamac Corporation,7/1/92. P. 314791-314795.

516. Memorandum to Randy Sturgeon, U.S. EPA, from Mr. RonaldG. Wilhelm, U.S. EPA, re: Draft report on speciationmodeling, 7/2/92. P. 314796-314817. The speciationmodeling report is attached.

517. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Draft letterreport for technical review comments on revised FS,7/2/92. P. 314818-314849. The draft letter report isattached.

120

518. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Dynamac'sreview of the revised RI, 7/2/92. P. 314850-314869.A list of inadequately addressed comments, a list ofadequately addressed comments, and three samplingresults tables are attached.

519. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: MonthlyProgress Report Number 47, 7/9/92. P. 314870-314872.A Finite Difference Grid is attached.

520. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Review of the FS,7/9/92. P. 314873-314877.

521. Agenda for a meeting between EPA and DNREC, 7/13/92.P. 314878-314878.

522. Memorandum to Mr. Roy Smith, U.S. EPA, from Mr. RandySturgeon, U.S. EPA, re: Calculation measures for onepercent of the total risk for contamination at thesite, 7/21/92. P. 314879-314880. A memorandum datedJuly 22, 1991 regarding a route-to-route basis to beused in calculation is attached.

523. Facsimile cover sheet to Mr. Randy Sturgeon, U.S. EPA,from Ms. Anne Hiller, DNREC, re: A paper on sedimentcontamination, 7/22/92. P. 314881-314887. The paperis attached.

524. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RogerT. Gresh, Woodward-Clyde Consultants, re: Informationdiscussed in a telephone conversation to be used in theEnvironmental Evaluation and a request for a one-weekextension for submittal of the EnvironmentalEvaluation, 7/23/92. P. 314888-314889.

525. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Glenn Earhart, U.S. Army Corps ofEngineers, re: Information on dredged material,7/28/92. P. 314890-314893.

526. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JohnP. Burke, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for June 1992, 7/28/92.P. 314894-314915. The report is attached.

121

527. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Wayne Walters, U.S. EPA, re: Definition of deednotification and deed restriction, 8/4/92. P. 314916-314916.

528. Report: Environmental Evaluation, Risk Assessment, DuPont-Newport Site. Newport. Delaware, Volume 2 of 2,prepared by Woodward-Clyde Consultants, 8/7/92.P. 314917-315309.


530. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Michael Watson, CIBA-GEIGY Corporation, re: Deliveryof reports on slurry wall construction, draw-down welleffects, and sewer integrity testing, 8/13/92.P. 315313-315313.

531. Letter to Mr. Larry S. Miller, U.S. EPA, from Mr.Raymond D. Richter, Delaware Department ofTransportation, re: Route 141 relocation thoughNewport, 8/17/92. P. 315314-315315.

532. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Review of therevised Ecological Evaluation, 8/26/92. P. 315316-315321. A list of inadequately addressed comments anda list of adequately addressed comments are attached.

533. Report: Final Remedial Investigation Report, Du Pont-Newport Site. Newport, Delaware. Volume 1 of 2,prepared by Woodward-Clyde Consultants, 8/26/92.P. 315322-315624. The following are attached:

a) two cover letters;

b) Attachment 1, Summary of EPA Comments andResponses;

c) a letter regarding EPA's review comments onthe RI, dated October 1, 1992;

d) a site map;

e) a letter regarding NOAA's review comments onthe RI and the FS, dated September 24, 1992.

122

534. Report: Final Remedial Investigation Report. Du Pont-Newport Site, Newport, Delaware, Volume 2 of 2,prepared by Woodward-Clyde Consultants, 8/26/92.P. 315625-316002.

535. Report: Final Focused Feasibility Study, Du Pont-Newport Site, Newport. Delaware. Volume 1 of 2.prepared by Woodward-Clyde Consultants, 8/27/92.P. 316003-316383. The following are attached:

a) two cover letters;

b) EPA's comments on the FS;

c) two Fabriform pamphlets;

d) a memorandum regarding comments on the FS,dated October 7, 1992;

e) information on remedial alternatives 1 and 2;

f) a letter regarding Delaware State ARARs;

g) a list of Delaware State ARARs.

536. Report: Final Focused Feasibility Study, Du Pont-Newport Site, Newport, Delaware, Volume 2 of 2,prepared by Woodward-Clyde Consultants, 8/27/92.P. 316384-316770.

537. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JohnP. Burke, CIBA-GEIGY Corporation, re: NPDES MonthlyDischarge Monitoring Report for July 1992, 8/31/92.P. 316771-316780. The report is attached.

538. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Mark D. Sprenger, U.S. EPA, re: Comments on theEnvironmental Evaluation, 9/1/92. P. 316781-316782.

539. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert Davis, U.S. EPA, re: Review of Volume 2 of theEnvironmental Evaluation Risk Assessment, 9/3/92.P. 316783-316785.

540. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Review of theFS, 9/3/92. P. 316786-316790. A copy of the letterand the review comments are attached.

123

541. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Terry McKenna, Dynamac Corporation, re:Barium concentration information, 9/4/92. P. 316791-316800. A memorandum dated July 23, 1992 regarding arisk based concentrations table, the risk basedconcentrations table, and information on barium areattached.

542. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Review of theRI, 9/4/92. P. 316801-316804. The review comments areattached.

543. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Douglas A. Donor, U.S. EPA, re: Comments on the ARARssection of the draft FS, 9/9/92. P. 316805-316825.The following are attached:

a) U.S. EPA Superfund LDR Guide #5, DeterminingWhen Land Disposal Restrictions (LDRs) areApplicable to CERCLA Response Actions;

b) U.S. EPA Superfund LDR Guide #5, DeterminingWhen Land Disposal Restrictions (LDRs) areRelevant and Appropriate to CERCLA ResponseActions;

c) a memorandum regarding interim guidance onnon-contiguous sites and on-site managementof waste and treatment residue, dated March27, 1986;

d) a memorandum regarding a consultation withRegion V on the Moss American Site.

544. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesP. Buczala, Woodward-Clyde Consultants, re: Activitiesconducted during August 1992 and the scheduledactivities for September 1992, 9/9/92. P. 316826-316828.

545. Report: Groundwater Model Input/Output Printouts.Final Focused Feasibility Study. Du Pont-Newport Site,Newport, Delaware, prepared by Woodward-ClydeConsultants, 9/11/92. P. 316829-317314. A coverletter is attached.

124

546. Letter to Mr. Peter Ludzia, U.S. EPA, from N.V. Raman,DNREC, re: Concerns about the draft Proposed Plan,9/14/92. P. 317315-317315.

547. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesP. Buczala, Woodward-Clyde Consultants, re: Costestimates for a ground water control system, 9/15/92.P. 317316-317318, A cost estimate table is attached.

548. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: The granting to Du Pont of a"Covenant Not to Sue" through provision of thePreliminary Natural Resources Survey, 9/17/92.P. 317319-317319.

549. Letter to Mr. Randy Sturgeon, U.S. EPA, from Anne V.Hiller, DNREC, re: Additions to the state ARARs,9/22/92. P. 317320-317321.

550. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, re: Review of theFS, 9/24/92. P. 317322-317324.

551. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter Knight and Mr. Donald A. MacDonald, NOAA, reReview of the final RI/FS, 9/24/92. P. 317325-317335.

552. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Dynamac'srevision of its evaluation of two remedialalternatives, 9/25/92. P. 317336-317345. The revisedremedial alternatives are attached.

553. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. Jon IParker, Woodward-Clyde Consultants, re: Results ofsupplementary evaluation of the FS, 9/25/92.P. 317346-317375. Results of the evaluation areattached.

554. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.SEPA, from Ms. Anne Hiller, DNREC, re: Transmittal ofletters concerning DNREC's comments on theEnvironmental Evaluation and the RI/FS reports,10/1/92. P. 317376-317379. The letters are attached.

125

555. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Approval of the Risk Assessment, RI, and FS, 10/7/92.P. 317380-317426. The following are attached:

a) a memorandum regarding EPA's review commentson the Risk Assessment, dated September 30,1992;

b) an ecotoxicological profile of arsenic;

c) information on barium;

d) a memorandum regarding EPA's review commentson the RI, dated October 1, 1992;

e) a site map;

f) a letter regarding NOAA's review comments onthe FS, dated September 24, 1992;

g) a memorandum regarding EPA's review commentson the FS, dated October 7, 1992;

h) information on Remedial Alternative 1;

i) information on Remedial Alternative 2;

j) a letter regarding Delaware State ARARs,dated September 18, 1992.

556. Handwritten note to Mr. Roy Smith, U.S. EPA, from Mr.Randy Sturgeon, U.S. EPA, re: Request for risks to becalculated using exposure assumptions, (undated).P. 317427-317430. A table of analytical data andhandwritten calculation notes are attached.

557. Table, Draft Proposed Intake Parameters, (undated).P. 317431-317436. The following are attached:

a) a soil ingestion table;c) a soil dermal table;d) a surface water table;e) a child blood lead levels table;f) a lead detection levels table.

126

558. Information package, Review of Chemical LoadingCalculations with Comments, prepared by DynamacCorporation, (undated). P. 317437-317440. General andspecific comments are attached.

559. Information package, Minerals in Plants, (undated).P. 317441-317442.

560. Journal article entitled "A Sediment Quality Triad:Measures of Sediment Contamination, Toxicity, andInfaunal Community Composition in Puget Sound," MarinePollution Bulletin, (undated). P. 317443-317453.

561. Table, Phase II Remedial Investigation Summary,(undated). P. 317454-317454.

562. Information package, Attachment 1, Clarification ofAnalyses Performed During Phase I and Phase II ofRemedial Investigation at the Du Pont-Newport Site,prepared by Woodward-Clyde Consultants, (undated).P. 317455-3J.7462.

563. U.S. Army Engineer Waterways Experiment StationSynthesis, Research Results, Dredged Material ResearchProgram, 4/80. P. 317463-317464.

564. Letter to Mr. Mark Czerwinski, CIBA-GEIGY Corporation,from Ms. Marlene 0. Moore, Artesian Laboratories, Inc.,re: Analysis results for sample numbers SS-69 toSS-76, 7/31/91. P. 317465-317466. A site map isattached.

565. Memorandum of Agreement between the Delaware RiverBasin Commission and the U.S. EPA, Region III,10/23/91. P. 317467-317476. Two site maps areattached.

566. Table, U.S. EPA Region III Risk-Based Concentrations,prepared by Mr. Roy L. Smith, 7/23/92. P. 317477-317477.

567. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Preliminary comments on thedraft Proposed Plan, 8/27/92. P. 317478-317481. Thecomments are attached.

127

568. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter T. Knight, NOAA, re: Comments on the draftProposed Plan, 9/17/92. P. 317482-317488. A list ofNOAA suggestions for remedial effectiveness monitoringis attached.

569. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Ms. Carol Macbeth, Dynamac Corporation, re:Arsenic toxicity information, 9/18/92. P. 317489-317492. An ecotoxicological profile of arsenic and alist of references are attached.

570. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Transmittal of state ARARs forthe site, 9/18/92. P. 317493-317498. The list ofstate ARARs is attached.

571. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on the draft ProposedPlan, 9/23/92. P. 317499-317505. The comments areattached.

572. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, re: Informationgathered through sampling and analysis which justifiesremediation, 9/24/92. P. 317506-317508.

573. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Review comments on theEnvironmental Evaluation Report, 9/28/92. P. 317509-317509.

574. Mr. Randy Sturgeon, U.S. EPA, from Ms. Anne V. Hiller,DNREC, re: Review comments on the RemedialInvestigation and the Feasibility Study, 9/28/92.P. 317510-317511.

575. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. Jon I,Parker and Mr. James P. Buczala, Woodward-ClydeConsultants, re: Submittal of the post-remediationmonitoring program supplement to the FS, 9/29/92.P. 317512-317526. The supplemental monitoring programis attached.

128

576. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter T. Knight, NOAA, re: Comments on the reviseddraft Proposed Plan, 9/30/92. P. 317527-317530. Alist of NOAA suggestions for remedial effectivenessmonitoring is attached.

577. Handwritten notes, re: Calculations showing results ofzinc contaminated ground water discharging intowetlands, prepared by Mr. Randy Sturgeon, 10/92.P. 317531-317531.

578. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on the revised draftProposed Plan, 10/2/92. P. 317532-317534. Thecomments are attached.

579. Telephone log book, 10/6/92 to 11/10/92. P. 317535-317545.

580. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Determination of the wetland remediation goals andriver sediment clean-up criteria, 10/6/92. P. 317546-317550.

581. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Information concerningDu Pont's matrix of determination for remediation ofwetlands, 10/7/92. P. 317551-317551.

582. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy L. Smith, U.S. EPA, re: Review and acceptance ofthe Human Health Risk Assessment, 10/7/92. P. 317552-317552.

583. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Review comments on theFS, 10/9/92. P. 317553-317554.

584. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter T. Knight, NOAA, re: Comments on the wetlandremediation goals, 10/20/92. P. 317555-327557.

585. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, re: Comments onthe draft Proposed Plan, 10/21/92. P. 317558-317559.

129

586. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Douglas A. Donor, U.S. EPA, re: Review of the ProposedPlan for land disposal restrictions applicability,10/22/92. P. 317560-317561.

587. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: River and wetland remediation goals, 10/27/92.P. 317562-317577. The following are attached:

a) Figure 1, Estimated Areas RequiringRemediation;

b) Figure 2, Site Areas Requiring SedimentsSampling to Delineate Areas for Remediation;

c) a memorandum regarding comments on the draftProposed Plan and sediment clean-up criteria,dated October 21, 1992;

d) a letter regarding NOAA's comments on thewetland remediation goals, dated October 20,1992;

e) handwritten notes regarding metalsconcentrations;

f) two site maps showing metals concentrations.

588. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on the revised draftProposed Plan, 10/28/92. P. 317578-317580. Thecomments are attached.

589. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, Du Pont Environmental Remediation Services,re: Delineation of the North Landfill boundary,10/29/92. P. 317581-317583. A site map is attached.

590. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter T. Knight, NOAA, re: Review comments on thedraft Proposed Plan, 10/29/92. P. 317584-317586.

591. Handwritten record of telephone conversation of Mr.Randy Sturgeon, U.S. EPA, with Mr. Bob Foley and Mr.Don Henne, U.S. Department of the Interior, re:Remedial strategy and monitoring, 10/29/92. P. 317587-317588.

130

592. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Description ofthe two supplemental remedial alternatives and costestimates, 10/30/92. P. 317589-317603. The followingare attached:

a) Attachment 1, Alternative 1: GroundwaterMonitoring;

b) Table 1, Estimated Capital Costs forAlternative 1;

c) Table 2, Annual Operation and MaintenanceCosts;

d) Attachment 2, Alternative 2: Eco-sampling;

e) Table 1, Pre-remediation Sampling in NorthDisposal Site Wetlands;

f) Table 2, Pre-remediation Sampling in SouthDisposal Site Wetlands;

g) Table 3, Pre-remediation Sampling in theChristiana River;

h) Table 4, Cost of Long Term Monitoring in theSouth Wetlands Per Event;

i) Table 5, Cost of Long Term Monitoring in theNorth Wetlands Per Event;

j) Table 6, Cost of Long Term Monitoring in theChristiana River Per Event;

k) Table 7, Bioavailability Monitoring in theSouth Wetlands;

1) Figure 1, Groundwater Monitoring Network.

131

593. Letter to Ms. Anne Hiller, DNREC, from Mr. RandySturgeon, U.S. EPA, re: Long term monitoringalternatives for the north and south wetlands,10/30/92. P. 317604-317618. The following areattached:

a) Attachment 1, Alternative 1: GroundwaterMonitoring;

b) Table 1, Estimated Capital Costs forAlternative 1;

c) Table 2, Annual Operation and MaintenanceCosts;

d) Attachment 2, Alternative 2: Eco-sampling;

e) Table 1, Pre-remediation Sampling in NorthDisposal Site Wetlands;

f) Table 2, Pre-remediation Sampling in SouthDisposal Site Wetlands;

g) Table 3, Pre-remediation Sampling in theChristiana River;

h) Table 4, Cost of Long Term Monitoring in theSouth Wetlands Per Event;

i) Table 5, Cost of Long Term Monitoring in theNorth Wetlands Per Event;

j) Table 6, Cost of Long Term Monitoring in theChristiana River Per Event;

k) Table 7, Bioavailability Monitoring in theSouth Wetlands;

1) Figure 1, Groundwater Monitoring Network.

594. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Roy Smith, U.S. EPA, re: Policy on lead clean-uplevels, 11/4/92. P. 317619-317619.

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595. Letter to Mr. Abraham Ferdis [sic], U.S. EPA, from Mr.N.V. Raman, DNREC, re: Concerns about the ProposedPlan, sediment cleanup criteria, and ground water andecological monitoring for the site, 11/5/92.P. 317620-317622.

596. Comments on the draft Proposed Plan, prepared by Ms.Nanci Cickowiz, (undated). P. 317623-317624.

597. Facsimile transmittal sheet to Satya from Mr. RandySturgeon, U.S. EPA, (undated). P. 317625-317631. Thefollowing are attached:

a) Figure 2, Site Areas Requiring SedimentsSampling to Delineate Areas for Remediation;

b) information concerning a monitoring plan;

c) information concerning NOAA comments on amonitoring program;

d) handwritten notes regarding a proposed groundwater monitoring plan.

598. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Jon Cuizon, Dynamac Corporation, re:Soils information to be reviewed, (undated).P. 317632-317640. Eight pages from a dictionary oftechnical terminology are attached.

599. Proposed Remedial Action Plan, Du Pont-NewportSuperfund Site, New Castle County, Delaware, preparedby U.S. EPA, 11/92. P. 317641-317695.

600. Report: Process Sewer System Integrity Testing.prepared by Groundwater Technology, Inc., 8/10/92.P. 317696-317775. A transmittal letter is attached.

601. Report: Preliminary Evaluation, Potential Impacts ofRemedial Construction. Newport Superfund Site, Newport,Delaware, prepared by Dames & Moore, 8/26/92.P. 317776-317795. Handwritten notes regardingconstruction are attached.

602. Report: Process Sewer System Manhole and Sump Repair,Project 2777002, (no author cited), (undated).P. 317796-317810.

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603. Report: Dredged Material Research Program, An Analysisof the Functional Capabilities and Performance of SiltCurtains, prepared by JBF Scientific Corporation, 7/78.P. 317811-318008.

604. Report: New Bedford Harbor Superfund Project, AcushnetRiver Estuarv Engineering Feasibility Study of Dredgingand Dredged Material Disposal Alternatives, Report 10,Evaluation of Dredging and Dredging ControlTechnologies, prepared by U.S. Department of the Army,11/88. P. 318009-318063.

605. Report: Evaluation of Dredged Material DisposalAlternatives for U.S. Navv Homeport at Everett,Washington, prepared by U.S. Department of the Army,1/89. P. 318064-318422.

606. Memorandum to record from Mr. Paul A. Zappi, re:Summary of information gathered about sedimentbarriers, 4/27/92. P. 318423-328428.

607. Report: Contract Lab Program Data Package for Du PontEnviron Remediation 5v, Inorganics Data Package.Christiana River Tidal Sampling Grab Water SamplesCollected on 12/15/92. 12/17/92 by JC. SN. DB, LLISample No. 1907079-1907095. 1908335-1908340. preparedby Lancaster Laboratories, Inc., 12/15/92. P. 318429-318814.

608. Report: Contract Lab Program Data Package for Du PontEnvironmental Remediation Services, Inorganics DataPackage. Christiana River Tidal Sampling Grab WaterSamples Collected on 12/17/92, 12/18/92 by SN/DB, LLISample No. 1908350-1908359. 1908981-1908993. preparedby Lancaster Laboratories, Inc., 12/17/92. P. 318815-319120.

609. Report: Tier 1 Data Package, Analytical Data Reportfor Du Pont Environ Remediation Sv, Christiana RiverTidal Sampling Grab Water Samples Collected on 12/22/92by SN/DB, LLI Sample No. 1910347-1910349, prepared byLancaster Laboratories, Inc., 12/22/92. P. 319121-319210.

134

610. Report: Contract Lab Program Data Package for Du PontEnvironmental Remediation Sv, Inorganics Data Package,Christiana River Tidal Sampling Grab Water SamplesCollected on 12/22/92, 12/29/92 bv SN/DB/BC, LLI SampleNo. 1908355, 1910242-1910248, 1910328-1910333. 1911821-1911828, prepared by Lancaster Laboratories, Inc.,12/22/92, P. 319211-319553.

611. Report: Contract Lab Program Data Package for Du PontEnvironmental Remediation Sv. Inorganics Data Package.Christiana River Tidal Sampling Grab Water SamplesCollected on 12/29/92, 12/30/92 by BC. LLI Sample No.1911840-1911847, 1912267-1912280. prepared by LancasterLaboratories, Inc., 12/29/92. P. 319554-319949.

612. Report: Contract Lab Program Data Package for Du PontEnviron Remediation Sv. Inorganics Data Package,Christiana River Tidal Sampling Grab Water SamplesCollected on 1/6/93 by DB, JP, LLI Sample No. 1912311-1912312, 1914118-1914134, prepared by LancasterLaboratories, Inc., 1/6/93. P. 319950-320317.

613. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. DonHenne, U.S. Department of the Interior, re: Reviewcomments on the Proposed Plan, 1/26/93. P. 320318-320319.

614. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoeDeming, CIBA-GEIGY Corporation, re: Comments on theProposed Plan, 1/28/93. P. 320320-320322. A FederalExpress receipt is attached.

615. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. MarkA. McNulty, Delaware Department of Transportation, re:Comments on a November 10, 1992 letter and a December2, 1992 Public Hearing, 1/19/93. P. 320323-320324.

616. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. JanEstep, Active Crane Rentals, Inc., re: The potentialeffect on Active Crane Rentals, Inc.'s business fromthe closing of South James Street , 1/26/93.P. 320325-320325.

617. Letter to Mr. J. Mervyn Harris, U.S. EPA, from Mr.Bernard L. Dworsky, Water Resources Agency for NewCastle County, re: Comments on the Proposed Plan,12/2/92. P. 320326-320329. A site map and a FederalExpress receipt are attached.

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618. Letter to Mr. Randy Sturgeon, U.S. EPA, fromMayor PaulF. Calistro, Jr., Commissioner Donald H. Mulrine, Jr.,and Mr. Mark D'Onofrio, Town of Newport, re: Commentson the Proposed Plan, 1/27/93. P. 320330-320331.

619. Report: Du Pont Comments. Proposed Remedial ActionPlan (PRAP), Du Pont Newport Superfund Site, Newport,Delaware, prepared by E.I. du Pont de Nemours &Company, Inc., 1/27/93. P. 320332-320459. A coverletter is attached. (Index entries 603, 615, 617, 620,and 621 are referenced in this report by E.I. du Pontde Nemours & Company, Inc.)

620. Information sheet, re: Solidification/stabilizationtechnologies, leachate protocol, and capping ofcontaminated sediments, 2/2/93. P. 320460-320465. Anarticle entitled "Silt Curtain Deployment andEffectiveness" is attached.

621. Report: Site Visit Trip Report for RI/FS Oversight andSplit Sampling of the Christiana River Sampling Event,December 17 and 22, 1992 at the Du Pont-Newport Site.Newport. Delaware, prepared by Dynamac Corporation,2/8/93. P. 320466-320493.

622. Report: Summary of Data Presentation, Christiana RiverWater Quality Investigation. Du Pont-Newport. SuperfundSite, Newport, Delaware, prepared by Woodward-ClydeConsultants, 2/12/93. P. 320494-320655. A coverletter and a Federal Express receipt are attached.

623. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, E.I. du Pont de Nemours & Company, Inc.,re: Follow-up comments on a March 3, 1993 meetingabout site impact on zinc water quality, 3/12/93.P. 320656-320667. The following are attached:

a) the comments;

b) Figure 1, Sampling Stations;

c) a memorandum regarding loading calculations,dated March 11, 1993;

d) project notes on zinc loading from the WhiteClay Creek, dated March 11, 1993;

136

e) project notes on zinc loading from the RedClay Creek, dated March 11, 1993.

624. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, E.I. du Pont de Nemours & Company, Inc.,re: Corrections and additions to the comments on aMarch 3, 1993 meeting about site impact on zinc waterquality, 3/29/93. P. 320668-320685. Figure 1,Sediment Stations, and a report entitled "1988 DelawareWater Quality Inventory, Volume II, Basin Analysis" areattached.

625. Report: Silt Curtains to Control Sediment Movement onConstruction Sites, prepared by Ontario Ministry ofTransportation, (undated). P. 320686-320721.

626. Report: Solidification/Stabilization Technology forReducing the Mobility of Heavy Metals in PollutedSediments, prepared by U.S. Department of the Army,(undated). P. 320722-320735.

627. Excerpt from Federal Register, pages 52061-52063,Volume 46, Number 205, 10/23/81. P. 320736-320738.

628. Table, Christiana River Sediment, Concentrations ofDetected Parameters, Du Pont-Newport Site, prepared byWoodward-Clyde Consultants, 6/87. P. 320739-320741.

629. Report: Inferences Mechanisms in Waste Stabilization/Solidification Processes, prepared by U.S. ArmyEngineer Waterways Experiment Station, 1/90.P. 320742-320863.

630. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Anthony J. Vellios, Dynamac Corporation, re: Review ofthe final Work Plan, 3/13/91. P. 320864-320865.

631. Journal article entitled "Predicting the Acute Toxicityof Copper in Freshwater Sediments: Evaluation of theRole of Acid-Volatile Sulfide," EnvironmentalToxicology and Chemistry, 3/31/92. P. 320866-320871.

632. Excerpt from Federal Register, pages 13389-13392,Volume 57, Number 74, 4/16/92. P. 320872-320875.

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633. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, Inc., from Mr. Randy Sturgeon, U.S. EPA, re:Review comments on the Feasibility Study and theRemedial Investigation, 7/24/92. P. 320876-320919.The following are attached:

a) Table 11, ARARs and To Be Considered Material(TCBs);

b) Exhibit 1-2, Selected Location-SpecificPotential ARARs;

c) Exhibit 1-3, Selected Action-SpecificPotential ARARs;

d) Superfund Guide #5, Determining when LandDisposal Restrictions (LDRs) are Applicableto CERCLA Response Actions.

634. Report: Proceedings, Tiered Testing Issues forFreshwater and Marine Sediments, prepared by U.S. EPA,9/16/92 to 9/18/92. P. 320920-320936.

635. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, re: Comments onthe Feasibility Study, 10/9/92. P. 320937-320938.

636. Memorandum to Mr. R. Sturgeon, U.S. EPA, from Mr. RoySmith, U.S. EPA, re: Lead clean-up levels, 11/4/92.P. 320939-320939.

637. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, E.I. du Pont de Nemours & Company, Inc., re:A 45-day extension to the public comment period for theProposed Plan, 11/20/92. P. 320940-320940.

638. Sign-in sheet from a meeting regarding the ProposedPlan, 12/9/92. P. 320941-320941.

639. Memorandum to Mr. Don Clay, U.S. EPA, from Mr. BruceDiamond, U.S. EPA, re: Remedy cost detailed in theProposed Plan, 12/11/92. P. 320942-320942.

640. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, Comments on thedraft ROD, 1/11/93. P. 320943-320943.

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641. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter T. Knight, NOAA, re: Comments on the draftRecord of Decision (ROD), 1/11/93. P. 320944-320945.

642. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Peter M. Stokley, U.S. EPA, re: Review comments on thedraft ROD, 1/15/93. P. 320946-320947.

643. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. DonHenne, U.S. DOI, re: Comments on the draft ROD,1/15/93. P. 320948-320950.

644. Memorandum to Mr. Peter Ludzia, U.S. EPA, from Mr.Joseph W. Kunz, U.S. EPA, re: Review of the draft ROD,1/15/93. P. 320951-320952.

645. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Bill Foster, U.S. EPA, re: Comments on the draft ROD,1/15/93. P. 320953-320954.

646. Letter to Whom It May Concern from E.I. du Pont deNemours & Company, Inc., re: Request foracknowledgement of receipt of six copies of E.I. duPont de Nemours & Company, Inc.'s comments on theProposed Plan, 1/27/93. P. 320955-320955.

647. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Cynthia E. Caporale, U.S. EPA, re: Inorganic DataValidation for Case 19277, 2/2/93. P. 320956-321017.The following are attached:


b) Table 1A, Summary of Qualifiers on DataSummary after Data Validation;

c) Table IB, Codes Used in Comments Column;


e) Table 3, Data Summary Forms;

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f) Table 4, Summary of Field Duplicate Outliers;

g) Appendix A, Results Reported by LaboratoryForm Inorganics;

h) Appendix B, TPO Report;

i) Appendix C, Support Documentation.

648. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesP. Buczala and Mr. Peter R. Jacobson, Woodward-ClydeConsultants, re: Additional copies of and correctionsto E.I. du Pont de Nemours & Company, Inc.'s commentson the Proposed Plan, 2/2/93. P. 321018-321022.

649. Letter of transmittal to Mr. Randy Sturgeon, U.S. EPA,from Mr. James P. Buzlala, Woodward-Clyde Consultants,re: Paper abstracts concerning contaminated sediments,2/8/93. P. 321023-321024. Three abstracts areattached.

650. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Elisabeth Freed, U.S. EPA, re: Review comments on thedraft ROD, 2/10/93. P. 321025-321029.

651. Letter to Mr. John R. Sturgeon [sic], from Mr. Peter T.Knight, NOAA, re: Review comments on E.I. du Pont deNemours & Company, Inc.'s comments on the ProposedPlan, 2/12/93. P. 321030-321034.

652. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Dynamac'srevised comments on E.I. du Pont de Nemours & Company,Inc.'s response to the Proposed Plan, 2/26/93.P. 321035-321062. The following are attached:

a) Attachment 1, Christiana River Flow Rates,December 1992 and Historical Data;

b) Attachment 2, Available Surface Water Datafrom the Christiana River;

c) Attachment 3, Sediment Remediation Data;

d) Attachment 4, List of Solidification CaseStudies.

140

653. Memorandum to Ms. Joan Colson, U.S, EPA, from Mr. RandySturgeon, U.S. EPA, re: Request for help in answeringquestions about stabilization of the south landfill,2/26/93. P. 321063-321089. Excerpts from the draftROD are attached.

654. Report: State of Delaware Surface Water QualityStandards, prepared by DNREC, 2/26/93. P. 321090-321167.

655. EPA and E.I. du Pont de Nemours & Company, Inc. postProposed Plan meeting information package, 3/3/93.P. 321168-321177.

656. Memorandum to Ms. Joan Colson, U.S. EPA, from Mr.Carlton C. Wiles, U.S. EPA, re: Review comments onportions of the proposed remedy, 3/10/93. P. 321178-321179.

657. Sign-in sheet from a sediment clean-up criteriameeting, 3/11/93. P. 321180-321187. The following areattached:

a) a goal and activity summary;

b) a facsimile transmittal sheet addressed toMr. Mark Springer, regarding directions tothe DNREC offices;

c) a facsimile transmittal sheet addressed toMs. Miriam Lynam;

d) a facsimile transmittal sheet addressed toMr. Rich Green;

e) a facsimile transmittal sheet addressed toMr. Dave Cortes [sic];

f) a facsimile transmittal sheet addressed toMs. Anne Miller [sic];

g) a facsimile transmittal sheet addressed toMr. Bob Foley.

658. Letter to Mr. Mike Giuanna [sic], U.S. EPA, from Mr.Karl Kalbacher, DNREC, re: Request for the NVF-YorklynSite to be evaluated under Federal Superfund for a SiteInspection, 3/12/93. P. 321188-321188.

141

659. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Revisions tothe performance schedule, 4/93. P. 321189-321205. Therevisions are attached.

660. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Steve Sottung, Dynamac Corporation, re:The evaluation of the Dredged Material Proposed forOcean Disposal report, 4/13/93. P. 321206-321212. Anexcerpt from the Dredged Material Testing Manual andinformation on the insects Hyalella azteca andChironomus tentans are attached.

661. Letter to Mr. John Austin, U.S. Nuclear RegulatoryCommission, from Mr. Randy Sturgeon, U.S. EPA, re: Arequest for a position about the disposition of thoriumfrom the north landfill, 4/13/93. P. 321213-321233. Asite map and a report entitled "Report of Analysis" areattached. (Excerpts from the draft ROD were attachedto the original letter.)

662. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Determination of the wetland and river sedimentclean-up criteria, 4/29/93. P. 321234-321265. Thefollowing are attached:

a) Table 1, Major Reasons why Stations RequireRemediation;

b) Figure 1, Sediment Characteristics;

c) Figure 2, River Sampling Data;

d) a letter regarding performance standards forsediment toxicity tests, dated April 29,1993;

e) a letter regarding wetland remediation goals,dated October 20, 1992;

f) a graph of normalized lead concentrations forstations requiring and not requiringremediation;

g) a graph of normalized cadmium concentrationsfor stations requiring and not requiringremediation;

142

h) a graph of normalized copper concentrationsfor stations requiring and not requiringremediation;

i) a graph of normalized mercury concentrationsfor stations requiring and not requiringremediation;

j) a graph of normalized zinc concentrations forstations requiring and not requiringremediation.

663. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Patricia M. Erickson, U.S. EPA, re: Solidification/stabilization of mixed metals, 4/29/93. P. 321266-321290. A data base print-out of data from laboratorytreatability studies for solidification/stabilizationis attached.

664. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Michael Weber, U.S. Nuclear RegulatoryCommission, re: Deed restriction used for a thoriumwaste disposal site in Michigan, 5/4/93. P. 321291-321294. The Declaration of Restrictive Covenants isattached.

665. Routing and transmittal slip to Mr. David Cortes [sic],DNREC, from Mr. Randy Sturgeon, U.S. EPA, re: Thedraft Coastal Zone Management Act ConsistencyDetermination, 5/6/93. P. 321295-321295. A partialletter can be seen behind the slip.

666. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Robert Foley, U.S. DOI, re: Comments on thewetland remediation goals, 5/12/93. P. 321296-321297.

667. DNREC, U.S. EPA, and E.I. du Pont de Nemours & Company,Inc. meeting information package, 5/19/93. P. 321298-321311.

668. Journal article entitled "Modeling Cadmium Fate atSuperfund Site: Impact of Bioturbation," Journal ofEnvironmental Engineering, 6/93. P. 321312-321322.

669. Table 3.5, Analysis of Lagoon Wastes as Received andAfter Stabilization Using St. Lawrence CKD, 6/4/93.P. 321323-321325. Handwritten notes regardingsolidification of wastes are attached.

143

670. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JohnH. Austin, U.S. Nuclear Regulatory Commission, re:Position about the disposition of thorium, 6/9/93.P. 321326-321344. Enclosure 1, Declaration ofRestrictive Covenants; Enclosure 2, Memorandum ofUnderstanding; and Enclosure 3, Suggested Revisions tothe Draft Record of Decision, are attached.

671. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Don MacDonald, NOAA, re: Electronicversions of graphs, 6/29/93. P. 321345-321346. Acover page for a report entitled "The Apparent EffectsThreshold Approach" is attached.

672. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RobertFoley, U.S. DOI, re: Review comments on the draftSediment Clean-Up Plan, 6/30/93. P. 321347-321348.

673. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Draft ARARs to be use in theROD, 7/7/93. P. 321349-321351. A list of the ARARs isattached.

674. Letter to Mr. Stanley L. Laskowski, U.S. EPA, from Mr.Christophe A.G. Tulou, DNREC, re: Concerns about theremedy for the south landfill described in the draftROD, 7/9/93. P. 321352-321354. A list of reasons forconcerns about the chosen remedy is attached.

675. Letter to Ms. Anne V. Hiller, DNREC, from Mr. RandySturgeon, U.S. EPA, re: The third draft of the ROD,7/12/93. P. 321355-321355.

676. Journal article entitled "Standard Guide for ConductingSediment Toxicity Tests with Freshwater Invertebrates,"Annual Book of American Society for Testing andMaterials Standards, (undated). P. 321356-321378.

677. Facsimile transmittal sheet to Mr. Don MacDonald, NOAA,from Mr. Randy Sturgeon, U.S. EPA, re: Wetlandssampling information, (undated). P. 321379-321382.Information on the Phase III Supplemental WetlandsInvestigation and two sampling data tables areattached.

144

678. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.S.EPA, from Mr. Michael Weber, U.S. Nuclear RegulatoryCommission, re: Information on thorium disposal,(undated). P. 321383-321397. A letter dated October16, 1961 regarding a request submitted by E.I. du Pontde Nemours & Company, Inc. for a license authorizingthe use of thorium salts, a letter dated October 30,1964 regarding a request for renewal of a license,number STB-489, filed by E.I. du Pont de Nemours &Company, Inc., and an Application for Source MaterialLicense, license number STB-489, are attached.

679. Report: Partition Coefficients of Biphenvl andNaphthalene between 1-Octanol and Water, prepared byThe Dow Chemical Company, 7/12/71. P. 321398-321402.

680. Report: Dowtherm® A and the Environment, prepared byThe Dow Chemical Company, 12/10/71. P. 321403-321415.

681. Report: An Analysis of the Distribution Pattern ofDowtherm® A in a River Environment, (undated).P. 321416-321430.

682. Material Safety Data Sheet for Therminol® VP-1 HeatTransfer Fluid, Monsanto Company, (undated).P. 321431-321437.

683. Letter to Mr. Don R. Clay, U.S. EPA, from Mr. R.L.Llagarman, Dow Chemical, re: Waiver of confidentialityclaims for studies, (undated). P. 321438-321458. Tworeports entitled, "Comparison of the Toxicity ofDowtherm A Heat Transfer Fluid and Thermally DegradedDowtherm A Heat Transfer Fluid to Aquatic Organisms,"and entitled "Determination of Uptake and ClearanceRates of 14C-Diphenyl in Rainbow Trout by RadiotracerTechniques" are attached.

684. Letter to Mr. Don Henne, U.S. DOI, Mr. Anthony Conte,USDI, Mr. Sean Morrison and Ms. Kirsten Erickson, NOAA,from Mr. Randy Sturgeon, U.S. EPA, re: Formalnotification that the RI/FS is nearing completion andrequest to develop a position on Preliminary NaturalResource Damages, 6/3/92. P. 321459-321459.

685. Letter to Ms. Anne Hiller, DNREC, from Mr. RandySturgeon, U.S. EPA, re: An opportunity to prepare aposition to grant Du Pont a "Convenant Not to Sue,"7/16/92. P. 321460-321460.

145

686. Letter to Mr. Thomas C. Voltaggio, U.S. EPA, from Mr.Jonathan P. Deason, DOI, re: Transmittal of thePreliminary Natural Resources Survey, 9/24/92.P. 321461-321478. A report entitled "TechnicalAnalysis of the E.I. du Pont de Nemours and Company,Inc. Superfund Site" is attached.

687. Report: Preliminary Natural Resource Survey, preparedby NOAA, 10/2/92. P. 321479-321501.

688. Memorandum to Mr. RSTURGEO [sic], U.S. EPA, from Mr.Roy Smith, U.S. EPA, re: Du Pont Table 6-1, 10/6/92.P. 321502-321502.

689. Telephone and Meeting Log Book, Volume III, 12/2/92 to6/4/93. P. 321503-321596.

690. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on EPA's draft ROD,1/28/93. P. 321597-321626. The following areattached:

a) Attachment 1, General DNREC Concerns;

b) Attachment 2, Text Comments;

c) Attachment 3, ARARs;

d) a letter regarding the ARARs list for theState of Delaware, dated September 18, 1992;

e) a letter regarding DNREC's comments on thedraft Proposed Plan, dated September 23,1992;

f) a letter regarding an addition to the ARARslist, dated September 22, 1992;

g) Table 1, U.S. Army Corps of EngineersDredging, List of Delaware Concerns andAgencies Involved in a Coordinated ReviewProcess of USCOE Operation and MaintenanceActivities;

h) a letter regarding DNREC's comments on theProposed Plan, dated November 5, 1992.

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691. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. MiriamA. Lynam, DNREC, re: Delaware Coastal ManagementProgram Policies and DNREC's Summary of FederalConsistency Procedures, 1/29/93. P. 321627-321721.The Delaware Coastal Management Program, Summary ofFederal Consistency Procedures, and Delaware CoastalManagement Program Policies are attached.

692. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Coastal Management ProgramConsistency Review information, 2/24/93. P. 321722-321760. A memorandum dated September 18, 1992regarding a summary of the Delaware Coastal ManagementProgram policies that are applicable to the ProposedPlan is attached.

693. Report: Comprehensive Update and Routine ProgramImplementation, prepared by the Delaware CoastalManagement Program, 3/93. P. 321761-321826.

694. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Concerns about the draft ROD,3/1/93. P. 321827-321830.

695. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, re: Comments onthe Proposed Plan, 3/2/93. P. 321831-321831.

696. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms.Benaifer R. Eduljee, DNREC, re: Information concerningpotential injury to muskrats at the site, 4/20/93.P. 321832-321833.

697. Journal article entitled, "High-Tech Landfill Caps,"Civil Engineering, prepared by Mr. Joseph C. Barbagalloand Mr. Salvatore J. Triano, Malcolm Pirnie, Inc.,5/93. P. 321834-321836.

698. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Transmittal of Delaware'sPreliminary Natural Resource Survey, 5/3/93.P. 321837-321842. The survey report is attached.

699. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on draft memo entitled,"River & Wetland Remediation Goals, Sediment CleanupCriteria, DuPont Newport Superfund Site," 5/13/93.P. 321843-321846.

147

700. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. SarahW. Cooksey, DNREC, re: Consistency determination forthe Du Pont-Newport Site, 5/26/93. P. 321847-321857.An excerpt from the Code of Federal Regulations, Volume15, pages 197-202, are attached.

701. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Development of a sedimentclean-up scheme recommended in a teleconferencemeeting, 6/3/93. P. 321858-321858.

702. Telephone and Meeting Log Book, Volume IV, 6/4/93-8/19/93. P. 321859-321890.

703. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments on the second draftROD, 6/9/93. P. 321891-321924. The following areattached:

a) general comments;

b) page specific comments;

c) a letter regarding the sediment clean-upscheme, dated June 3, 1993;

d) a letter regarding DNREC's comments on thesediment cleanup criteria, dated May 13,1993;

e) a letter regarding DNREC's concerns aboutEPA's first draft ROD, dated March 1, 1993;

f) a letter regarding DNREC's comments on EPA'sfirst draft ROD, dated January 28, 1993;

g) a letter regarding DNREC's comments on theproposed remedial actions, dated November 5,1992;

h) a letter regarding DNREC's comments on thedraft Proposed Plan, dated September 23,1992.

704. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Preliminary outline of DNREC'ssediment clean-up plan, 6/10/93. P. 321925-321925.

148

705. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: DNREC's proposed sedimentclean-up plan, 6/21/93. P. 321926-321944. A draftreport entitled "Sediment Cleanup Plan, DuPont NewportSuperfund Site" and a journal article entitled,"Analysis of Acid-Volatile Sulfide (AVS) andSimultaneously Extracted Metals (SEM) for theEstimation of Potential Toxicity in Aquatic Sediments"are attached.

706. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Preliminary comments on thedraft Responsiveness Summary, 6/23/93. P. 321945-321949. General and page specific comments areattached.

707. Letter to Mr. John R. Sturgeon [sic], U.S. EPA, fromMr. Peter T. Knight, NOAA, re: Comments summarizingdiscussion on the sediment clean-up criteria,additional toxicity testing, and monitoring of theremedial action plan, 6/29/93. P. 321950-321951.

708. Letter to Mr. Stanley L. Laskowski, U.S. EPA, from Mr.Christophe A.G. Tulou, DNREC, re: Comments andrecommendations concerning the remedy for the SouthLandfill, 7/9/93. P. 321952-321954. Comments on theproposed remedy are attached.

709. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Third and final edition of the memorandumdescribing the determination of the wetland and riversediment criteria, 7/9/93. P. 321955-321985. A letterregarding revised performance standards and monitoringrequirements and a report entitled, "Sampling Plan andPerformance Standards for the Du Pont-Newport Site."

710. Letter to Mr. Robert S. Davis, U.S. EPA, from Mr. PeterT. Knight, NOAA, re: NOAA's comments on the ROD andthe Decision Summary, 7/23/93. P. 321985a-321985j.The draft Restoration Proposal of the MichaelsvilleLandfill Vegetation and Appendix 2, Estimated CostComparison for Vegetation Installation and Operationand Maintenance, are attached.

711. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Changes to the ARARs table inthe ROD, 7/27/93. P. 321986-321986.

149

712. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Robert S. Davis, U.S. EPA, re: Transmittal ofNOAA's comments on the draft ROD, 7/30/93. P. 321987-321997. A letter dated July 23, 1993 regardingcomments on the draft ROD is attached.

713. Memorandum to RSTURGEO [sic], U.S. EPA, from Mr.William Schremp, U.S. EPA, re: Air emissionsrequirements and the disposal of soil, 8/2/93.P. 321998-321998.

714. Memorandum to Mr. John R. Sturgeon [sic], U.S. EPA,from Mr. Bill Foster, U.S. EPA, re: Comments on theproposed ROD, 8/2/93. P. 321999-322000.

715. Letter to Mr. Robert Davis, U.S. EPA, from Mr. RobertE. Foley, U.S. DOI, re: Comments on proposed ROD,8/6/93. P. 322001-322003.

716. Letter to Mr. Stanley L. Laskowski, U.S. EPA, from Ms.Mary L. McKenzie, DNREC, re: Letter of non-concurrencewith the ROD, 8/17/93. P. 322004-322008. The commentsare attached.

717. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Greg Koltonuk, U.S. EPA, re: Comments on the RODconcerning the underground storage tank system,8/19/93. P. 322009-322009.

718. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: DNREC's non-concurrence with the proposed ROD,8/23/93. P. 322010-322010.

719. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Coastal Management Zone Act ComplianceDetermination, 8/23/93. P. 322011-322026.

720. Letter to Mr. Robert Kuehl and Ms. Anne Hiller, DNREC,from Mr. Randy Sturgeon, U.S. EPA, re: Negotiation ofa consent decree for the Remedial Design/RemedialAction (RD/RA) with the potentially responsibleparties, 8/24/93. P. 322027-322027.

721. Letter to Mr. Anthony R. Conte and Mr. Mark Barash,USDI, and Mr. Don Henne, U.S. DOI, from Mr. RandySturgeon, U.S. EPA, re: Negotiation of a consentdecree for the RD/RA with the potentially responsibleparties, 8/24/93. P. 322028-322028.

150

722. Letter to Ms. Kirsten L. Erickson and Mr. Peter Knight,NOAA, from Mr. Randy Sturgeon, U.S. EPA, re: Negotia-tion of a consent decree for the RD/RA with thepotentially responsible parties, 8/24/93. P. 322029-322029.

723. Letter to Mr. David Carters, DNREC, from Mr. RandySturgeon, U.S. EPA, re: Consistency determination,8/24/93. P. 322030-322030.

724. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Notes and information used to determine whetherthe AWQC/SWQS should be waived, 8/24/93. P. 322031-322057. Four pages of handwritten notes and chemicaltoxicity information for common soil background levelsare attached.

725. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Camille Costa, Dynamac Corporation, re: Revisedperformance schedule, (undated). P. 322058-322074. Areport entitled "Sampling Plan and PerformanceStandards for the DuPont-Newport Site" and Attachment2, Cost Estimates for Sediment Tests at DuPont,Newport, are attached.

726. Information submitted to Mr. Randy Sturgeon, U.S. EPA,from Mr. Rick Greene, DNREC, re: Contamination in theRed Clay Creek and White Clay Creek, (undated).P. 322075-322205. The following are attached:

a) STORET Data for Total and Dissolved Zinc,Woodale Station;

b) a letter regarding the 1990 Red Clay CreekReport, dated September 25, 1990;

c) a report entitled "Zinc Contamination in theWaters and Sediments of the Red Clay Creek,New Castle County, Delaware," dated July1990;

d) a report entitled "Final Sampling Plan, WhiteClay Creek Intensive Survey;"

e) a report entitled, "Synoptic Report on ToxicSubstances Contamination of Red Clay Creek;"

151

f) a portion of a report entitled, IntensiveToxics Survey on the White Clay Creek."

727. Excerpt from Code of Federal Regulations Chapter I,Volume 10, pages 126-147, (undated). P. 322206-322216.

728. Excerpt from Code of Federal Regulations, Chapter I,Volume 10, pages 644-647, (undated). P. 322217-322218.

729. Excerpt from Code of Federal Regulations, Chapter I,Volume 10, pages 344-347, (undated). P. 322219-322220.

730. Journal article entitled "Acid-Volatile Sulfide (AVS)in a Seasonally Anoxic Mesotrophic Lake: Seasonal andSpatial Changes in Sediment AVS," EnvironmentalToxicology and Chemistry, (undated). P. 322221-322227.

731. Editorial entitled "Understanding the Toxicity ofContaminants in Sediments: Beyond the Bioassay-BasedParadigm," Environmental Toxicitv and Chemistry,(undated). P. 322228-322231.

732. Record of Decision, E.I. Du Pont-Newport SuperfundSite, New Castle County, Delaware, 8/93. P. 322232-322480.

Record of Decision Amendment Information

The following documents ware used in preparation of aProposed Remedial Action Plan for the South Landfill area ofthe site. However, no final decision requiring changes willbe made until after the public comment period.

733. Letter to Mr. Paul Welsh, Delaware Department ofTransportation (DelDOT), from Mr. Edward R. Kubala andMr. Scott Simon, EA Engineering, Science, andTechnology, re: Submittal of a proposal to provideenvironmental services, 3/2/93. P. 322481-322486. Afacsimile cover sheet and Figure 1, Proposed testboring location map, DelDOT Newport Basin Road Portionof the Superfund Site, are attached.

152

734. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JosephT. Wutka and Mr. Mark C. Tudor, DelDOT, re:Transmittal of an Environmental Data Review Report,4/29/93. P. 322487-322493. The following areattached:

a) a letter regarding a summary report ofinformation from the record about the site,dated April 2, 1993;

b) Figure 1, Site location map, DelDOT, BasinRoad Portion of the Site, Newport, Delaware;

c) Figure 2, EPA's estimated area scheduled forremedial excavation, DelDOT, Newport BasinRoad Portion of the Superfund Site;

d) Figure 3, Site excavation location map,proposed EPA remedial excavation, andpreviously excavated Route 141 constructionarea, DelDOT, Basin Road Portion of theNewport Site.

735. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. EdwardR. Kubala, EA Engineering, Science, and Technology, re:Transmittal of analytical detection limits, 4/29/93.P. 322494-322509. The following are attached:

a) four tables entitled Method Detection Limits(MDLS) Determined for Soil Samples By EALaboratories According to 40 CFR 136 AppendixB;

b) a letter regarding the submittal of aproposal to provide environmental services,dated March 2, 1993;

c) Figure 1, Proposed test boring location map,DelDOT Newport Basin Road Portion of theSuperfund Site;

d) a letter regarding a summary report ofinformation from the record about the site,dated April 2, 1993;

e) Figure 1, Site location map, DelDOT, BasinRoad Portion of the Site, Newport, Delaware;

153

f) Figure 2, EPA's estimated area scheduled forremedial excavation, DelDOT, Newport BasinRoad Portion of the Superfund Site;

g) Figure 3, Site excavation location map,proposed EPA remedial excavation andpreviously excavated Route 141 constructionarea, DelDOT, Basin Road Portion of theNewport Site.

736. Report: Preliminary Environmental Investigation,DelDOT, Basin Access Road (Newport Superfund Site),Newport, Delaware, prepared by EA Engineering, Science,and Technology, Inc., 8/93. P. 322510-322646. Aletter dated October 20, 1993 regarding transmittal ofthe report is attached.

737. Excerpts from a telephone log book, 8/26/93 to10/18/94. P. 322647-322662.

738. Handwritten meeting attendance list and meeting summarynotes, 1/28/94. P. 322663-322666.

739. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesP. Buczala and Mr. Peter R. Jacobson, Woodward-ClydeConsultants, re: Monthly Progress Report Number 66,2/8/94. P. 322667-322668.

740. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RobertWiederhorn, DuPont Chemicals, re: Submittal of aproposal for remedial alternatives for the SouthLandfill and Christiana River portions of the site,2/25/94. P. 322669-322671.

741. Letter to Mr. Robert Wiederhorn, DuPont Chemicals, fromMr. Randy Sturgeon, U.S. EPA, re: Preliminary reviewof the proposal submitted February 25, 1994 forremedial alternatives for the South Landfill and theChristiana River portions of the site, 3/2/94.P. 322672-322673.

742. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, DuPont, re: Monthly Progress Report Number68, 3/9/94. P. 322674-322675.

154

743. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RobertWiederhorn, DuPont Chemicals, re: A more detaileddescription for the proposal for remedial alternativesfor the South Landfill and Christiana River portions ofthe site, 3/14/94. P. 322676-322690. The followingare attached:

a) South Disposal Portion of the Site RemedialOption summary;

b) Table 1, South Disposal Site Remedial Option,Institutional Controls-Access RoadImprovements, Low Permeability Cover System-Soil Bentonite Slurry Wall, South PondClosure, Preliminary Cost Estimate, DuPontNewport Site;

c) Figure 1, Cross-Section J-J1 South DisposalSite Remedial Option, Newport, Delaware;

d) Figure 2, Cross-Section Location Relative toSlurry Wall Locations, South Disposal SiteRemedial Option 3B, DuPont-Newport Site,Newport, Delaware;

e) Figure 3, South Disposal Site RemedialOption, DuPont-Newport Site, Newport,Delaware.

744. Letter to Mr. Robert Davis, U.S. EPA, from Mr. RobertJ. Pennington, U.S. Department of the Interior, re:Comments on the proposal for remedial alternatives forthe South Landfill and Christiana River portions of thesite, 3/14/94. P. 322691-322692.

745. Telephone log book entry, re: Site work to beperformed by DuPont, 3/15/94. P. 322693-322694.

746. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Status of a possible change to the remedy at theSouth Landfill portion of the site, 3/29/94.P. 322695-322695.

747. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JoelKarmazyn, DuPont, re: Monthly Progress Report Number69, 4/4/94. P. 322696-322697.

155

748. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, DuPont Chemicals, re: Summary of issuesconcerning the Consent Decree negotiations, 4/8/94.P. 322698-322701.

749. Letter to Mr. Joel Karmazyn, E.I. du Pont de Nemours &Company, from Mr. Randy Sturgeon, U.S. EPA, re:Request for additional information about the proposedremedy for the South Landfill portion of the site,4/26/94. P. 322702-322702.

750. Letter to Mr. Randy Sturgeon and Mr. Robert S. Davis,U.S. EPA, from Mr. Peter T. Knight, National Oceanicand Atmospheric Administration (NOAA), re: Reviewcomments on the revised Proposed Plan, 5/5/94.P. 322703-322706.

751. Memorandum to Mr. John R. Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Review comments on therevised Proposed Plan, 5/5/94. P. 322707-322709.

752. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.Raymond D. Richter, DelDOT, re: Concerns on the Recordof Decision for the Basin Road Access Road Area portionof the site, 5/13/94. P. 322710-322711.

753. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Transmittal of comments on thedraft Proposed Plan, 5/18/94. P. 322712-322713. Thecomments are attached.

754. Memorandum to Mr. Don Draper, U.S. EPA, from Mr. RandySturgeon, U.S. EPA, re: Request for review of theproposed remedy for the South Landfill portion of thesite and a request to discuss the effectiveness atlimiting or preventing the migration of heavy-metalcontamination to the ground water, wetlands, and river,5/25/94. P. 322714-322715.

755. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesBuczala and Mr. Peter T. Jacobson, Woodward-ClydeConsultants, re: Response to an April 26, 1994 letterrequesting estimates on ground water discharge andmetals loading to the south wetlands, 5/27/94.P. 322716-322719.

156

756. Facsimile transmittal sheet to Mr. Randall Ross, U.S.EPA, from Mr. Randy Sturgeon, U.S. EPA, re: Commentson the South Landfill portion of the site remedialalternative proposed by DuPont, 7/29/94. P. 322720-322735. An excerpt from the draft Remedial Design andRemedial Action Work Plan for the DuPont NewportSuperfund Site, dated July 29, 1994 is attached.

757. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Randall Ross, U.S. EPA, re: Comments on the proposedremedial alternatives for the site, 8/5/94.P. 322736-322737.

758. Handwritten memorandum to file from Mr. Randy Sturgeon,U.S. EPA, re: Summary of concerns from the BiologicalTechnical Assistance Group, 8/26/94. P. 322738-322738.

759. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Review of the second draft ofthe Proposed Plan, 10/4/94. P. 322739-322740.

760. Memorandum to Mr. Abe Ferdas, U.S. EPA, from Mr. DavidBennett, U.S. EPA, re: Confirmation of the results ofthe Proposed Plan consultation on the South Landfillportion of the site, 10/6/94. P. 322741-322741.

761. Excerpts from the handwritten lognotes of Mr. RandySturgeon, U.S. EPA, 8/26/93. P. 322742-322748.

762. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Transmittal of commentson the draft Proposed Plan, 9/28/94. P. 322749-322754.Two letters containing the comments of the NationalOceanic and Atmospheric Administration are attached.

763. Memorandum to M. Maghini, P. Knight, and C. Guy, fromMr. Robert S. Davis, U.S. EPA, re: Transmittal ofcorrespondence with Mr. Randy Sturgeon, U.S. EPA,concerning comments on the Proposed Plan, 9/30/94.P. 322755-322776. The following are attached:

a) a memorandum concerning the hydrology at thesite, dated August 5, 1994;

b) a letter containing DuPont's comments inresponse to EPA's April 26, 1994, request forestimates of groundwater discharge and metalsloading, dated May 27, 1994;

157

c) a letter responding to EPA's request of March2, 1994, for more information concerningDuPont's proposed remedial alternative, datedMarch 14, 1994;

d) a memorandum from Woodward-Clyde Consultantsconcerning the "South Disposal Site RemedialOption."

764. Memorandum to Mr. Abraham Ferdas, U.S. EPA, from Mr.David Bennett, U.S. EPA, re: Conditional confirmationof the preferred alternative for the DuPont NewportSouth Landfill Site, 10/6/94. P. 322777-322777.

765. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Regulatory commentsconcerning the remedial alternative for the site,10/18/94. P. 322778-322780.

766. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RobertJ. Pennington, U.S. Department of the Interior, re:Review and comments concerning the Proposed Plan,10/18/94. P. 322781-322783.

767. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RobertJ. Pennington, U.S. Department of the Interior, re:Comments concerning remedial alternatives, 10/20/94.P. 322784-322785.

768. Handwritten memorandum to file from Mr. Randy Sturgeon,U.S. EPA, re: The decision to retain treatment as acomponent of the remedy for the site, 11/28/94.P. 322786-322787.

769. DuPont Company's modified remedial proposal for theNewport, Delaware Superfund Site, 12/16/94.P. 322788-322791.

770. Information packet, DuPont-Newport Superfund Site,South Landfill Remedy Proposal Meeting, prepared byDuPont to present to EPA, 1/18/95. P. 322792-322899.A packet containing boring logs and particle size testresults from the South Landfill is attached.

771. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. P.Brandt Butler, DuPont, re: Assumptions and overallconcept of the proposed remedial alternative for thesite, 2/14/95. P. 322900-322901.

158

772. Report: Proposal, South Landfill Treatment, preparedby DuPont, 3/15/95. P. 322902-323073.

773. Report: Proposal, South Landfill Treatment, preparedby DuPont, 4/5/95. P. 323074-323320.

774. Facsimile transmittal sheet to Mr. Randy Sturgeon, U.SEPA, from Mr. Ramon F. Benitez, U.S. Army Corps ofEngineers, re: Comments on the South LandfillTreatment Proposal, 4/14/95. P. 323321-323323.

775. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. KarlF. Kalbacher, DNREC, re: Comments on the SouthLandfill Treatment Proposal, 5/12/95. P. 323324-323324.

776. Memorandum to Mr. David M. Kargbo, U.S. EPA, from Mr.Randy Sturgeon, U.S. EPA, re: Comments concerning thesoil for the South Landfill Treatment Proposal, 6/1/95P. 323325-323326.

777. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Comments concerning increased costs of remedialaction and the scope of the alternative remedies forthe site, 7/14/95. P. 323327-323328.

778. Memorandum to file from Mr. Randy Sturgeon, U.S. EPA,re: Notification that upcoming changes to the remedyfor the South Landfill are still consistent with theCoastal Zone Management Act, 7/19/95. P. 323329-323329.

779. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.Robert S. Davis, U.S. EPA, re: Regulatory review andcomments on the ESD, 7/19/95. P. 323330-323331.

780. Excerpts from the handwritten lognotes of Mr. RandySturgeon, U.S. EPA, 7/21/95-7/28/95. P. 323332-323333

781. Telephone lognotes of a voicemail message to Mr. RandySturgeon, U.S. EPA, from Ms. Sharon Frey, U.S. EPA, reApproval of the ESD from EPA Headquarters andnotification that no further consultation is needed,7/31/95. P. 323324-323324.

782. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneV. Hiller, DNREC, re: Comments concerning the SouthLandfill ESD, 8/4/95. P. 323325-323326.

159

783. Letter to Mr. Thomas Voltaggio, U.S. EPA, from N. V.Raman, DNREC, re: DNREC's review of and concurrencewith the proposed remedy change, 8/4/95. P. 323327-323327.

784. Handwritten memorandum to file from Mr. Randy Sturgeon,U.S. EPA, re: Review of 1991 memorandum concerninggroundwater contamination, 8/8/95. P. 323328-323328.

785. Report: Chemical Treatment Performance Standard-SouthLandfill Alternate Treatment, prepared by DuPont,8/11/95. P. 323329-323346.

786. Explanation of Significant Differences, E.I. DuPont-Newport Superfund Site, New Castle County, Delaware,8/16/95. P. 323347-323380.

787. Facsimile memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. James Fajkowski, U.S. Army Corps of Engineers(USAGE), re: Transmittal of comments on the NorthLandfill and Plant Area at the site, 10/31/95.P. 323381-323385. The October 20, 1995, and October27, 1995, comments, with hand written notes, areattached.

788. Letter to Mr. Brandt Butler, DuPont, from Mr. RandySturgeon, U.S. EPA, re: Comments on the September 29,1995, Value Engineering Report for the North Landfilland Plant Area, 12/13/95. P. 323386-323387.

789. Report: Plant Area. Value Engineering Report,Addendum, Newport Superfund Site, Newport, Delaware.prepared by DuPont, 5/6/96. P. 323388-323512.

790. Report: North Landfill, Value Engineering ReportAddendum, Columbia Aguifer Assessment and SitewideHvdrogeologic Conceptual Model, prepared by DuPont,7/2/96. P. 323513-323793. A July 2, 1996, submittalletter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, DuPont, is attached.

791. Excerpts from DuPont Environmental Remediation Services(DERS) Project No. 2124, with handwritten notes,7/2/96. P. 323794-323798. An August 15, 1996, Table4, "Columbia Aquifer Assessment and SitewideHydrological Conceptual Model, Groundwater QualityData," is attached.

160

792. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, DuPont, re: Transmittal of photographs forinsertion in the Columbia Aquifer Assessment Report,Appendix A, 7/16/96. P. 323799-323806. Thephotographs are attached.

793. Comments on the North Landfill Value Engineering ReportAddendum, Columbia Aquifer Assessment and SitewideHydrogeologic Conceptual Model, prepared by USAGE,7/19/96. P. 323807-323809. An August 14, 1996,facsimile transmittal memorandum to Mr. Randy Sturgeon,U.S. EPA, from Ms. Justina Wesley, CENAB, is attached.

794. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.David Kargbo, U.S. EPA, re: Comments concerning theColumbia Aquifer Assessment and Sitewide HydrogeologicConceptual Model, 8/13/96. P. 323810-323810.

795. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneHiller, DNREC, re: Comments on the Columbia AquiferAssessment and Sitewide Hydrogeologic Conceptual Modeland recommended modification to the current RODperformance standards, 8/15/96. P. 323811-323812. AnAugust 7, 1996, memorandum to Mr. Kurt Olinger, DNREC,from Ms. M. Margie Zhang, DNREC, is attached.

796. Letter to Mr. Brandt Butler, DuPont, from Mr. RandySturgeon, U.S. EPA, re: Summary of issues discussed inthe September 11, 1996, EPA meeting concerning theinstallation of a slurry wall to the base of the fillzone, which was requested in the July 2, 1996, ColumbiaAquifer Assessment and Sitewide HydrogeologicConceptual Model, 9/11/96. P. 323813-323814.

797. Protectiveness Assessment, Potential Impact of theColumbia Aquifer on the Christina River, NewportSuperfund Site, prepared by DuPont, 1/17/97.P. 323815-323823. A January 17, 1997, submittal letterto Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, DuPont, is attached.

798. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, DuPont, re: Transmittal of Figure 2, "WellLocations, Groundwater River ProtectivenessAssessment," which was inadvertently omitted from theJanuary 17, 1997, Protectiveness Assessment, PotentialImpact of the Columbia Aquifer on the Christina River,1/28/97. P. 323824-323825. Figure 2 is attached.

161

799. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, DuPont, re: Submittal of supplementalinformation to the January 17, 1997, ProtectivenessAssessment, Potential Impact of the Columbia Aquifer onthe Christina River, 2/20/97. P. 323826-323827.Christina River hardness data is attached.

800. Letter to Ms. Barbara Okorn, U.S. EPA, from Mr. Peter -Knight, National Oceanic and Atmospheric Administration(NOAA), re: Comments on the January 17, 1997,Protectiveness Assessment, Potential Impact of theColumbia Aquifer on the Christina River, 3/14/97.P. 323828-323832. Table 1, "Concentrations of selectedtrace elements detected in surface water of theChristina River during Phase I RI for Koppers Company,Newport Site, Delaware," and Table 2, "Ambient Water-Quality Criteria (AWQC) ranges for Cd, Pb, and 2n inthe Christina River," are attached.

801. Report: Phase II Evaluation of IntrinsicBioremediation. Newport Superfund Site, Newport,Delaware, prepared by DuPont, 7/16/97. P. 323833-323971.

802. Review Comments, Phase II Evaluation of IntrinsicBioremediation, Newport Superfund Site, Newport,Delaware, (author not cited), 7/16/97. P. 323972-323973.

803. Memorandum to Ms. Justina Wesley, USAGE, from Mr. JaredOlsen, CENAB, re: Transmittal of comments on the PhaseII Evaluation of Intrinsic Bioremediation, 8/12/97.P. 323974-323977. The August 12, 1997, and August 13,1997, comments are attached.

804. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Justina Wesley, USAGE, re: Notification that adocument has been saved as a WordPerfect 5.2 forWindows file, 8/21/97. P. 323978-323978.

805. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Joyce Boyd, U.S. EPA, re: Retrieval of data from theEPA's storet system database, 9/18/97. P. 323979-323984.

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806. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.William Pew, DuPont, re: Submittal of Christina RiverBottom Integrity Assessment, which supplements theJanuary 17, 1997, Protectiveness Assessment, PotentialImpact of the Columbia Aquifer on the Christina River,10/23/97. P. 323985-323986.

807. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.William Pew, DuPont, re: Clarification of request forminor modifications to the North Landfill and PlantArea vertical barrier remedies, 10/31/97. P. 323987-323989.

808. Memorandum to the file from Mr. Randy Sturgeon, U.S.EPA, re: Draft North Landfill Ground Water BarrierWall Depth Modification, E.I. DuPont, Newport SuperfundSite, 11/97. P. 323990-323999.

809. Facsimile memorandum to Mr. Randy Sturgeon, U.S. EPA,from Mr. Matt Brill, DuPont, re: Transmittal of boringand monitoring well information, 11/21/97. P. 324000-324003. A September 11, 1990, Log of Boring No. TB-34,an April 3, 1991, figure, "Report of Monitoring WellMS-34A," and an April 3, 1991, figure, "Report ofMonitoring Well MW-34B," are attached.

810. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Mr.William Pew, DuPont, re: Transmittal of a cost savingsestimate for the North Landfill Short Wall, 12/2/97.P. 324004-324005. The cost estimate is attached.

811. Memorandum to Mr. Randy Sturgeon, U.S. EPA, fromMr. Peter Knight, NOAA, re: Notification of the needfor an adequate monitoring program to address concernsabout models, assumptions, inputs to the ChristinaRiver, and documentation of the success of the remedialaction, 12/17/97. P. 324006-324006.

812. Memorandum to the file from Mr. Randy Sturgeon, U.S.EPA, re: Modification to the selected remedy in theAugust 26, 1993, ROD, based on new informationconcerning the Columbia Aquifer and its interactionwith the Christina River, 2/26/98. P. 324007-324018.A February 26, 1998, transmittal letter to Mr. WilliamPew, DuPont, from Mr. Randy Sturgeon, U.S. EPA, and aFebruary 25, 1998, concurrence memorandum to Mr. RandySturgeon, U.S. EPA, from Mr. David Kargbo, U.S. EPA,are attached.

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813. Table entitled "Hardness Dependent Acute and ChronicFreshwater AWQCs for Trace Elements,"(undated).P.324019-324020.

814. Five-Year Review Report, E.I. Dupont, Newport SuperfundSite, Newport, Delaware, 3/31/00. P. 324021-324031.

815. Letter to Mr. Stephen Hsu, DuPont Engineering, from Mr.Guglielmetti, DuPont Environmental RemediationServices, re: Details of field investigation to beconducted by Dupont Environmental Remediation Servicesto determine extent of waste material between the sewerline and the Christina River, 8/28/95.P. 324032-324032.

816. Report: South Landfill Value Engineering Report,Newport Superfund Site, prepared by DuPontEnvironmental Remediation Services, 10/30/95.P. 324033-324173.

817. Geotechnical Comments on Value Engineering Report, E.I.DuPont Newport Superfund Site, South Landfill, preparedby USAGE, 11/30/95. P. 324174-324176. A December 4,1995, transmittal memorandum to Mr. Randy Sturgeon,U.S. EPA, from Ms. Justina Wesley, USAGE, is attached.

818. Excerpts from the handwritten lognotes of Mr. RandySturgeon, U.S. EPA, 9/15/95-7/10/97. P. 324177-324188.

819. Letter to Mr. Brandt Butler, DuPont EnvironmentalRemediation Services, from Mr. Randy Sturgeon, U.S.EPA, re: EPA's comments on the October 30, 1995, SouthLandfill Value Engineering Report, 2/7/96.P. 324189-324190.

820. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, DuPont Environmental Remediation Services, re:Details of DuPont Environmental Remediation Servicesproposal to install wells on the South Landfill portionof the site, 2/8/96. P. 324191-324192. A February 7,1996, site map entitled, "Newport Superfund Site, SouthLandfill Proposed Well Locations for Permeability Test,Groundwater Extraction, and Monitoring," is attached.

821. Report: South Landfill Value Engineering ReportAddendum, Newport Superfund Site, Newport, Delaware.prepared by DuPont Environmental Remediation Services,4/8/96. P. 324193-324255.

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822. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtBulter, DuPont Environmental Remediation Services, re:Submission of addendum to the October 30, 1995, reportentitled, "South Landfill Value Engineering Report,"4/9/96. P. 324256-324256.

823. Letter to Mr. Randy Sturgeon, U.S. EPA, from Ms. AnneHiller, DNREC, re: DNREC's comment on the ValueEngineering Report Addendum, 5/7/96.P. 324257-324258.

824. Memorandum to Ms. Anne Hiller, DNREC, Chris Guy, U.S.Fish and Wildlife Service (USFWS), Barbara Okorn, U.S.EPA, Mr. Peter Knight, NOAA, and Mr. Ramon Benitez,USAGE, re: Comments on the South River Bank CoverSystem, 6/6/96. P. 324259-324260.

825. Memorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Barbara Okorn, U.S. EPA Biological Technical AssistanceGroup, re: Comments on the South River Bank CoverSystem, 6/12/96. P. 324261-324261.

826. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. RamonBenitez, USAGE, re: Comments on the South River BankCover System, 6/13/96. P. 342262-324263.

827. Letter to Mr. Brandt Butler, Dupont EnvironmentalRemediation Services, from Mr. Randy Sturgeon, U.S.EPA, re: Comments on the report entitled, "SouthLandfill Value Engineering Report," 6/28/96.P. 324264-324265.

828. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr.William Pew, Dupont Environmental Remediation Services,re: Submission of groundwater data from South Landfillmonitoring wells, 12/2/97. P. 324266-324269. ADecember 12, 1997 table entitled, "South LandfillGroundwater Quality," and a November 11, 1997, figureentitled, "South Landfill Wells," are attached.

829. Letter to Mr. William Pew, DuPont EnvironmentalRemediation Services, from Mr. Randy Sturgeon, U.S.EPA, re: Comments on Dupont's request to removerequirement for treatment of South Landfill wastematerial, 1/6/98. P. 324270-324270.

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830. Report: South Landfill Treatabilitv Report, NewportSuperfund Site, Newport, Deleware, prepared by DupontCorporate Remediation Group, 3/26/99.P. 324271-324330. A March 26, 1999, transmittal letterto Mr. Randy Sturgeon, U.S. EPA, from Mr. William Pew,Dupont Corporate Remediation Group, is attached.

831. Presentation packet entitled, "South Landfill Review,Newport Superfund Site," prepared by DuPont, 5/4/00.P. 324331-324346.

832. Presentation Packet entitled, "Permeable Reactive Wallfor Newport South Landfill," prepared by Mr. JohnWilkins, Dupont Central Research & Development, 5/4/00.P. 324347-324360.

833. Electronic mail memorandum to Mr. Peter Ludzia, U.S.EPA, from Mr. Randy Sturgeon, U.S. EPA, re:Notification that EPA's Mr. Ken Lovelace had informedMr. Sturgeon that use of a reactive barrier wall aroundthe South Landfill would meet preference for treatmentat the site, 5/25/00. P. 324361-324361.

834. Report: Permeable Reactive Barrier Treatment, SouthLandfill, Newport Superfund Site, Newport, Delaware,prepared by DuPont Corporate Remediation Group, 7/7/00.P. 324362-324601.

835. Excerpts from the handwritten lognotes of Mr. RandySturgeon, U.S. EPA, 9/6/00-4/9/01. P. 324602-324607.

836. Presentation packet entitled, "South Landfill Review,Newport Superfund Site," prepared by DuPont, 10/6/00.P. 324608-324649.

837. Report: Dupont Newport Superfund Site, South LandfillProject, South James Street Alternatives, EngineeringReport, prepared by URS Corporation, 11/00.P. 324650-324681. A November 29, 2000, transmittalletter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler for Mr. Jim Aker, Dupont Corporate RemediationGroup, is attached.

838. Electronic mail memorandum to Mr. Brandt Butler, URSCorporation, from Mr. Randy Sturgeon, U.S. EPA, re:Request for more information about issues concerningthe South Landfill, 11/30/00. P. 324682-324682.

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839. Electronic mail memorandum to Mr. Randy Sturgeon, U.S.EPA, from Mr. Kurt Olinger, DNREC, re: Comments on thereport entitled, "South James Street AlternativesEngineering Report," 12/12/00. P. 324683-324683.

840. Electronic mail memorandum to Ms. Jennifer Chan, U.S.EPA, from Mr. Brandt Butler, URS Corporation, re:Information that PRB treatment will not do anything tochromium or arsenic, 2/2/01. P. 324684-324685. AFebruary 2, 2001, electronic mail transmittalmemorandum to Mr. Randy Sturgeon, U.S. EPA, from Ms.Jennifer Chan, U.S. EPA, is attached.

841. Document entitled, "Response to EPA Comments,Feasibility Assessment and Proposal, South LandfillPermeable Reactive Barrier Remedy, Newport SuperfundSite, Newport, Delaware," 3/1/01. P. 324686-324725. AMarch 1, 2001, transmittal letter to Mr. RandySturgeon, U.S. EPA, from Mr. Jim Aker, Dupont CorporateRemediation Group, and a March 2, 2001, transmittalletter to Mr. Randy Sturgeon, U.S. EPA, from Mr. BrandtButler, URS Corporation, are attached.

842. Electronic mail memorandum to Mr. Randy Sturgeon, U.S.EPA, from Mr. Christopher Clayton, USAGE, re:Transmittal of reviews of the reactive wall at theSouth Landfill, 3/19/01. P. 324726-324730. A March13, 2001, document entitled, "Feasibility Assessmentand Proposal: Permeable Reactive Barrier Remedy,Newport Superfund Site, Newport, Delaware, ReviewComments," and a March 8, 2001, document entitled,"Newport Superfund Site, Delaware, Feasibility Study &Proposal, South Landfill Permeable Reactive BarrierRemedy, Geotechnical Review Comments," are attached.

843. Report: Feasibility Assessment and Proposal: PermeableReactive Barrier Remedy, Newport Superfund Site,Newport, Delaware, 1/01. P. 324731-325059. A January22, 2001, transmittal letter to Mr. Randy Sturgeon,U.S. EPA, from Mr. Jim Aker, Dupont CorporateRemediation Group, is attached.

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844. Document entitled, "Response to Supplemental EPAComments, Feasibility Assessment and Proposal, SouthLandfill Permeable Reactive Barrier Remedy, NewportSuperfund Site, Newport, Delaware," 5/11/01.P. 325060-325073. A May 11, 2001, transmittal letterto Mr. Randy Sturgeon, U.S. EPA, from Mr. Jim Aker,Dupont Corporate Remediation Group, is attached.

845. Document entitled, "Protective Assessment, SouthLandfill Permeable Reactive Barrier Remedy, NewportSuperfund Site, Newport, Delaware," 5/17/01.P. 325074-325077. A May 17, 2001, transmittal letteris attached.

846. Handwritten memo to file from Mr. Randy Sturgeon, U.S.EPA, re: Documentation of discussion of South WetlandsProtective Assessment, 5/18/01. P. 325078-325079.

847. Handwritten memo to file, from Mr. Randy Sturgeon,U.S.EPA, re: EPA's comments on the report entitled,"Dupont-Newport South Landfill Permeable ReactiveBarrier Proposal," 5/18/01. P. 325080-325080.

848. Explanation of Significant Differences, South Landfill,E.I. DuPont-Newport Superfund Site, New Castle County,Delaware, 5/01. (This ESD replaces the remedy selectedin the 1995 ESD). P. 325081-325121.

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IV. REMOVAL CORRESPONDENCE

Memorandum to Mr. Richard J. Guimond, U.S. EPA, fromMr. Stanley L. Laskowski, U.S. EPA, re: Transmittal ofa CERCLA Funding Request for a Removal Action, 4/22/93.P. 400001-400013. The following are attached:

a) an initial funding request;

b) a letter regarding comments on the Dowthermdata by NOAA;

c) a memorandum regarding comments on theDowtherm Spill;

d) a sample location map/ James and WaterStreets, CIBA-GEIGY Seep Assessment.

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V. COMMUNITY RELATIONS/CONGRESSIONAL CORRESPONDENCE/IMAGERY

1. U.S. EPA Fact Sheet, Du Pont-Newport Site, 2/90.P. 500001-500005.


3. Letter to Mr. William Toffel, U.S. EPA, from Ms.Katrina Celenza, Dynamac Corporation, re: Changes tothe Community Relations Plan, 1/17/90. P. 500011-500011.

4. Report: Community Relations Plan for Du Pont-NewportSite, prepared by Dynamac Corporation, 7/17/90.P. 500012-500039.

5. Cover sheet for a Non-Public Mailing List for theDu Pont-Newport Site, prepared by Dynamac Corporation,7/17/91. P. 500040-300040.


7. Letter to Ms. Carrie Dietzel, U.S. EPA, from Ms.Katrina Celenza, Dynamac Corporation, re: Notes takenat the public meeting, 10/5/90. P. 500043-500047. Thenotes are attached.

8. Site photographs, 5/21/37 - 9/10/38. P. 500047a-500047e. A cross-section diagram of the site isattached.

9. Map, Relocated Delaware Route 141 Thru Newport, 1/5/72.P. 500047f-500047f.

10. Map, Site Topography and Test Boring, Test Pit, andWell Location Plan, Du Pont-Newport, Delaware, preparedby Woodward-Clyde Consultants, 3/3/88. P. 500048-500048.

11. Press Release from U.S. EPA Environmental News entitled"U.S. EPA Issues Consent Order to E.I. du Pont deNemours and Company to Study the Du Pont-NewportLandfill," 8/29/88. P. 500049-500050.

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12. Newspaper article entitled "Du Pont agrees to waste-cleanup tests," The Morning News, 9/8/88.P. 500051-500051.

13. Newspaper article entitled "Du Pont agrees to waste-cleanup tests," The Evening Journal, 9/8/88.P. 500052-500052.

14. Site photographs, 9/23/88 and 9/26/88. P. 500053-500062. A list with explanations is attached.

15. Letter to Mr. Gerardo Amador, U.S. EPA, from PaulFikac, Jacobs Engineering Group Inc., re: Transmittalof photographs of activities at the Du Pont-Holly RunPlant, 10/17/88. P. 500063-500089. Photographs andnegatives are attached.

16. Schematic Diagram of Du Pont-Newport Site, prepared byWoodward-Clyde Consultants, 6/28/89. P. 500090-500091.A project flowpath is attached.

17. Du Pont Community Relations, Private Citizen's BoilerPlate Questionnaire, 2/90. P. 500092-500093.

18. Letter to Mr. Leonard Episcopo, Town of Newport,Delaware, from Mr. Bill Toffel, U.S. EPA, re:Establishment of an information repository, 2/2/90.P. 500094-500094.

19. Figure 1, EPA, Proposed Phase III Well DrillingLocations, Du Pont-Newport Site, prepared by Woodward-Clyde Consultants, 2/2/90. P. 500095-500109. Thefollowing are attached:

a) Figure 2, Reported Groundwater Concentrationsof Arsenic from the Shallow Zone;

b) Figure 3, Reported Groundwater Concentrationsof Arsenic from the Intermediate Zone;

c) Figure 4, Reported Groundwater Concentrationsof Barium from the Shallow Zone;

d) Figure 5, Reported Groundwater Concentrationsof Barium from the Intermediate Zone;

e) Figure 6, Reported Groundwater Concentrationsof Cadmium from the Shallow Zone;

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f) Figure 7, Reported Groundwater Concentrationof Cadmium from the Intermediate Zone;

g) Figure 8, Reported Groundwater Concentrationsof Zinc from the Shallow Zone;

h) Figure 9, Reported Groundwater Concentrationsof Zinc from the Intermediate Zone;

i) Figure 10, Reported GroundwaterConcentrations of Tetrachloroethylene (PCE)from the Shallow Zone;

j) Figure 11, Reported GroundwaterConcentrations of Tetrachloroethylene (PCE)from the Intermediate Zone;

k) Figure 12, Reported GroundwaterConcentrations of Trichloroethylene (TCE)from the Intermediate Zone;

1) Figure 13, Reported GroundwaterConcentrations of Trichloroethylene (TCE)from the Intermediate Zone;

m) Figure 15, Mean Concentration of Parameters(August 1987 - December 1988), IntermediateZone;

n) Figure 16, Mean Concentration of Parameters(August 1987 - December 1988), Deep Zone.

20. Record of communication to file from Mr. RandySturgeon, U.S. EPA, re: Establishment of theinformation repository for community relationspurposes, 2/20/90. P. 500110-500110.

21. Handwritten notes, re: Interviews with residents,2/28/90. P. 500111-500112.

22. Monitoring Well Location Plan showing the August 1987shallow zone TCE concentrations, prepared by Woodward-Clyde Consultants, 3/2/90. P. 500113-500126. Thefollowing are attached:

a) Monitoring Well Location Plan showing theDecember 1988 shallow zone TCEconcentrations;

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b) Monitoring Well Location Plan showing theAugust 1988 shallow zone PCE concentrations;

c) Monitoring Well Location Plan showing theDecember 1988 shallow zone PCEconcentrations;

d) Monitoring Well Location Plan showing theAugust 1987 shallow zone cadmiumconcentrations;

e) Monitoring Well Location Plan showing theAugust 1987 intermediate zone cadmiumconcentrations;

f) Monitoring Well Location Plan showing theAugust 1987 deep zone cadmium concentrations;

g) Monitoring Well Location Plan showing theDecember 1988 shallow zone cadmiumconcentrations;

h) Monitoring Well Location Plan showing theDecember 1988 intermediate zone cadmiumconcentrations;

i) Monitoring Well Location Plan showing theDecember 1988 deep zone cadmiumconcentrations;

j) Monitoring Well Location Plan showing theAugust 1987 shallow zone zinc concentrations;

k) Monitoring Well Location Plan showing theAugust 1987 intermediate deep zone zincconcentrations;

1) Monitoring Well Location Plan showing theDecember 1988 shallow zone zincconcentrations;

m) Monitoring Well Location Plan showing theDecember 1988 intermediate zone zincconcentrations.

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23. Letter to Mr. William W. Toffel, U.S. EPA, from Ms.Katrina A. Celenza, Dynamac Corporation, re:Scheduling of a community meeting for the Du Pont-Newport Site, 7/10/90. P. 500127-500128. A letterregarding the community meeting is attached.

24. Press Release from U.S. EPA Environmental Advisoryentitled "EPA to Hold Public Meeting on the Du PontNewport Superfund Site," 9/10/90. P. 500129-500129.

25. Handwritten memorandum to file from Mr. Randy Sturgeon,U.S. EPA, re: Public meeting on September 18, 1990,9/26/90. P. 500130-500131.

26. Sign-in sheet from Du Pont-Newport public meeting,9/20/90. P. 500132-500133.

27. Report: Site Analysis, Du Pont-Newport Site, Newport,Delaware, Volume 1, prepared by The BioneticsCorporation, 2/91. P. 500134-500183. {* Volume 2 ofthis report contains two foot by three foot sitephotographs with plastic overlays. This report can befound at the U.S. EPA Region III Office inPhiladelphia, PA.)

28. Sediment Quality Triads, prepared by Woodward-ClydeConsultants, 2/19/91. P. 500184-500197. Five datatables, two site sediment chemistry analyses, and aconceptual transport model are attached.

29. Handwritten routing and transmittal slip to Mr. RandySturgeon, U.S. EPA, from Mr. Andy Sochanski, U.S. EPA,re: Telephone conversations with residents, 5/16/91.P. 500198-500203. Five telephone conversation recordsregarding discussions with residents about the use oftheir wells are attached.

30. Du Pont-Newport site map with handwritten comments,prepared by Dynamac Corporation, 7/1/91. P. 500204-500204.

31. U.S. EPA Fact Sheet, re: Du Pont-Newport SuperfundSite, Newport, New Castle County, Delaware, 8/91.P. 500205-500208.

32. U.S. EPA Fact Sheet, re: Du Pont-Newport SuperfundSite, Newport, Delaware, 8/92. P. 500209-500212.

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33. Newspaper article entitled "Newport: A Town inTransition," News Journal, (undated). P. 500213-500213.

34. Transcript of Public Hearing, Du Pont-Newport SuperfundSite, prepared by Wilcox & Fetzer, Ltd., 12/2/92.P. 500214-500269.

35. Letter to Mr. Randy Sturgeon, U.S. EPA, from Mr. JamesBuczala, Woodward-Clyde Consultants, re: Transmittalof Flood Insurance Rate Maps (FIRM) of the site,11/16/92. P. 500270-500274. The following areattached:

a) Flood Insurance Rate Map, Community-PanelNumber 105085 0045B, dated September 4, 1986;

b) Flood Insurance Rate Map, Community-PanelNumber 105085 0030B, dated September 4, 1986;

c) Flood Insurance Rate Map, Community-PanelNumber 105085 0040C, dated July 3, 1990;

d) Flood Insurance Rate Map, Community-PanelNumber 105085 0025C, dated July 3, 1990.

36. U.S. EPA Press Release, re: Release of the ProposedPlan, 11/15/92. P. 500275-500275.

37. Map, Residential Well Locations, Former KoppersCompany, Inc., Newport Site, Newport, Delaware,prepared by Woodward-Clyde Consultants, 12/9/92.P. 500276-500276.

38. Report: Community Relations Plan, DuPont-NewportSuperfund Site, prepared by U.S. EPA, 8/97. P. 500277-500324.

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BIBLIOGRAPHY OF SITE SPECIFIC GUIDANCE DOCUMENTS

1. U.S. EPA Superfund LDR Guide #5, Determining when LandDisposal Restrictions (LDRs) are Applicable to CERCLAResponse Actions, 7/89.

2. U.S. EPA Superfund LDR Guide #7, Determining when LandDisposal Restrictions (LDRs) are Relevant andAppropriate to CERCLA Response Actions, 12/89.

3. U.S. EPA CERCLA Compliance with Other Laws Manual,Overview of ARARs, Focus on ARAR Waivers, 12/89.

4. Memorandum to the Directors of the Waste ManagementDivisions of Regions I, II, IV, V, VII, and VIII; theDirector of the Emergency and Remedial ResponseDivision of Region II; the Directors of the HazardousWaste Management Divisions of Regions III and VI; theDirector of the Toxic Waste Management Division ofRegion IX; and the Director of the Hazardous WasteDivision of Region X, U.S. EPA, from Mr. Henry L.Longest, III and Mr. Bruce Diamond, U.S. EPA, re:Interim guidance on the establishment of soil leadcleanup levels at Superfund sites, 12/8/89.

5. Stabilization/Solidification of CERCLA and RCRA Wastes,Physical Tests, Chemical Testing Procedures, TechnologyScreening, and Field Activities, prepared by EPA/ORD,5/89.EPA/625/6-89/022

6. A Guide to Principal Treats and Low Level ThreatWastes, prepared by EPA/OSWER, 11/91.9380.3-06FS29

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