°00043

December 23, 1988

MEMORANDUM

Subject: Report on ERT Soil Gas Survey Conducted at theIndustrial Excess Landfill Site, Uniontown, OH,February and April, 1988

From: Harry L. Alien, Ph.D.EPA, Environmental Response Team

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To: Julie Mathiesen, Remedial Project ManagerEPA, Region V

BACKGROUND

Industrial Excess Landfill (IEL) is a former industrial andmunicipal waste landfill located in northeast Ohio between Akronand Canton in the town of Uniontown. The 29.86 acre site islocated in a rural/residential area less than a mile from thecenter of town. Originally excavated as a sand and gravel miningoperation until 1966, the site was converted to a landfillreceiving industrial waste at first and later adding municipalrefuse. The landfill was closed in 1980 pursuant to a court-ordered consent agreement and capped with locally available sandand gravel.

In 1983, complaints by community residents prompted investi-gations to ascertain whether there were drinking water contamina-tion and health risks associated with the site due to off-sitemigration of gases and/or contaminated ground water. In October,1984, the U.S. EPA announced the inclusion of IEL on theNational Priority List (NPL). The Remedial Investigation (Rl)has been completed as of this report. The Environmental ResponseTeam (ERT) conducted a soil gas survey supported by monitoring ofthe gas extraction well and gas monitoring well networks inFebruary, 1988. Additional questions were raised by the resultsand a further effort was conducted in April, 1988, to extend theboundaries of the soil gas survey. This report summarizes theavailable res-ults of the ERT studies.

SAMPLING AND ANALYTICAL METHODOLOGY

Determination of the composition of the gas in the soil porespace above a contaminated ground water aquifer has been shown tobe a practical way to describe the areal extent of an undergroundplume. Combined with ground water monitoring a soil gas surveyis a powerful and cost-effective means of describing a problemand optimizing remedial alternatives in many cases. It is par-ticularly effective when the problem of interest is migration of

vapors in the unsaturated zone itself, such as is the case on ornear a landfill such as IEL. The situation at IEL led ERT tobelieve the site was a good candidate for a successful soil gaseffort, which proved to be the case.

A standard soil gas survey begins by defining the area to beinvestigated. The area selected first is usually a locationwhere contamination is suspected. First, a 5-foot deep by1/2-inch hole is pounded into the soil using a "slam bar" (tileprobe or slide-hammer). A five-foot, hollow, stainless steeltube is inserted through this hole into the soil as a soil gasprobe. The soil-to-probe interface is sealed with modeling clayat the ground surface, and a portable air sampling pump is usedto purge the line and pull fresh soil gas into the samplingtrain. Next, a hand-held photoionization detector (PID), such asan HNu, is connected to the probe and the soil gas is screenedfor organic content. Where methane and combustible gases are thetarget materials a combustible gas indicator (CGI) and/or a port-able instrument employing a flame-ionization detector (FID), suchas the organic vapor analyzer (OVA), may be used. Finally, aone-liter Tedlar bag air sample is collected from the soil gasprobe and submitted for analysis by gas chromatography in a fieldlaboratory. Soil samples for textural or chemical analysis may betaken from the same hole using special, small-diameter core samp-lers. Also, soil temperature may be taken at the five-foot depthlevel by inserting a temperature probe after the samples havebeen taken. Soil gas sampling locations are shown on the enclosedsite map (Figure 1). The field results using the HNU for organicvapors and the soil temperatures are shown at Tab A.

Chemical analysis of soil gas samples follows a tieredapproach which includes the following: field screening, field labGC with various detectors (PID, ECD, and AID), and confirmationof a select number of samples by GC/MS analysis in an establishedlaboratory. Preliminary screening of the extraction well gas wasconducted in January so that target compounds could be selectedfor the calibration gas. The results of this effort are shown atTab B. The first (February) soil gas survey screened approxi-mately 112 sampling points in transects across the site andaround the site along and across the suspected contaminant flowpaths. The results of the IEL field lab work which included ana-lysis by the Photovac (PID) and the Sentex Scentograph (usingboth the Electron Capture Detector <ECD> and the Argon InductionDetector <AID>), as well as the GC/MS results areshown in Tables 2, 3, and 5, at Tab A.

In addition to the soil gas survey, all 12 of the landfillgas extraction wells and all 15 of the State's off-site gasmigration monitoring wells were sampled for landfill gases byOVA, HNu and the Photovac (PID). The results of these analysesare shown in Tables 1 and 4, respectively, at Tab A. The head-space of each of four shallow ground water monitoring wells weresampled and analyzed in the same manner. Because these sampleswere taken from open tubes, the method of sampling deserves anote. Each gas extraction well had a removable cap with a

restricted opening. Each gas monitoring well consisted of a nestof piezometers with a tube connecting each to the surface. Totry to avoid mixing with ambient air, a 10-foot section of Teflontubing was fitted with a rubber stopper of appropriate outsidediameter to seal the inside of the well tube. This apparatus wasthen inserted into the well and the remainder of the soil gassampling procedure was followed. For the water wells, the sameapparatus was used but instead of a good seal, the tube wasquickly inserted down the well as soon as the well cap wasopened. The well cap was then replaced as closely as possibleand the standard procedure was again followed. In this way mostambient air was excluded. The results of these analyses are sum-marized in at Tab A for the target compounds and at Tab C for thenon-target compounds. The locations of all wells are shown inFigure 2.

The February operation raised several questions about thecompleteness of our coverage of the site particularly along thesouthern boundary and in some of the residential areas. Thus, asecond round of soil gas analysis was conducted of April 12-21,1988. Soil gas was taken from 27 locations including 3 whichwere sampled in February to enable us to key into the previousstudy. The results are tabulated at Tab D for the field data andtarget compounds and at Tab E for the non-target compounds.

Complete data packages, including all quality assuranceinformation will be forwarded under separate cover.

DATA HANDLING AND EVALUATION

Part of the mission of the ERT is to evaluate different fieldand analytical methodologies and to communicate its findings toother elements of the Superfund program. In theory, this shouldlead to a more effective problem assessment effort by the entireprogram. It is our experience that sampling and analytical meth-odology can have a profound effect on the results and on the con-clusions drawn from them. Consequently, we are continuously try-ing to find the techniques most applicable to the problem athand. We believe were able to do this at the IEL site.

The IEL soil gas study produced several sets of data from thesame set of samples. For a typical soil gas sample there aredata from the HNu, the Photovac, the Sentex BCD, the Sentex AID,and GC/MS; there are also quality assurance duplicate analyses.Within this gallery of methods, there is a variation in sensiti-vity to the compounds of interest, and, therefore, a differencein the detection limit and in the accuracy of quantitation. Forinstance, for 1,1,1-TCA, TCE, and PCE, the ECD is a better detec-tor, but for methylene chloride the AID is more sensitive. Formethane, the OVA in the chromatographic mode is the instrument ofchoice. Normally the data from the most sensitive technique forthe compound of interest is used for problem assessment. Thefinal master list of soil gas and well data is shown at Tab F.Included in the table are the (x,y) coordinates for each of thesoil gas samples from both studies.

The standard techniques for treating ground water or soil gasdata assume that there is a normal distribution of contaminationwith in the area of interest, i.e., "the site." This may or maynot be true depending upon the isotrophy of the subsurface envi-ronment and the distribution of the sources (tanks or spills) ofthe contaminants being studied. Where multiple sources (e.g.,.leaking tanks) of the same contaminant exist over a large area, atechnique which presumes a normal distribution, such as Kriging,may produce a misleading picture of the contaminant distribution.Discontinuities in the patterns generated by contouring programsor in patterns developed from different contaminants may indicateeither multiple epicenters of contamination or subsurface geo-logic conditions which are anisotrophic. In either event addi-tional sampling may be required to describe the actual situation.

(•

The program used to evaluate this data was "Surfer" from theGolden Software Company. This program has given us a reliableinterpretation of soil gas vs. ground water data in the past, andit is also versatile and quick to use. Interpolation was accom-plished using a Kriging algorithm. The resultant graphic forbenzene is shown in Figure 3. A computer assisted drawing system(Autocad) was used to superimpose these contours on the base mapto create Figure 4. Benzene was chosen as a surrogate volatileorganic because of its wide distribution on the site.

The results of the soil gas studies appear to reveal a con-sistency with the hypothesis that significant off-migration oflandfill gases is not occurring at Uniontown. The data clearlyshow that extreme concentrations on the landfill itself rapidlydissipate in the off-site unsaturated zone and in the groundwater. There is a great deal of consistency in the data from thetwo sampling events as well as in the duplicate samples, blanks,etc. All indications are that the data are as valid as possibleand that the results support the conclusions which follow.

CONCLUSIONS

After extensive soil gas and gas monitoring well investi-gations, the ERT has been unable to demonstrate significant off-site gas migration in the unsaturated zone of the soil at the IELsite in Uniontown, Ohio. We also see no need for additional soilgas work at this site; the topography of the down-gradient areais not conducive to any further refinement of the technique.

The available evidence indicates that the active extractionwell system, combined with the natural geology of the site con-fines the fugitive landfill gases to the zone of collection tothe west and north of the site. To the south and east of thesite, the shallow ground water system forces any migrating gas tothe surface, where it dissipates into the atmosphere. While,most assuredly, a significant off-gassing situation exists on thelandfill itself, the current remedial action of actively collect-ing and burning the gases appears to be mitigating any discern-able public health threat.

DOC ID: 48392PAGE #: 5

UNSCANNABLE IMAGERY INSERT

SUPERFUND DOCUMENT MANAGEMENT SYSTEM (SDMS)

This document is an unscannable item in SDMS.Please contact the ERA Region V Superfund Records Center to view this document.

SITE NAME

EPA ID NUMBER

PHASE /ACTIVITY

PRP AFFILIATION

REASON WHYUNSCANNABLE

UNSCANNABLEDESCRIPTION /CONTENT

DATE(S) OFUNSCANNABLE(S)

INDUSTRIAL EXCESS LANDFILL INC

OHD 000377911

ADMINISTRATIVE RECORD

NONE

ILLEGIBLE OR X FORMAT:OVERSIZED

BLUE PRINT OF SOIL GAS LOCATIONS

NONE

ID. SOU. GAS LOCATIONSAND APH. 1988

IEL SOIL GAS LOCATIONSFE1 AND APR. 1988

GAS MONITORING AND EXTRACTION VELLS SAMPLE!

1371.40F i g u r e } - IK! SOU, GAS BFJIZFNF CONTOURS IN PPB

1152.11 -

932.83 -

713.54 -

494.25 -

274.96 -

55.68 -

-163.61 -

-382.90

Minimum Contour 1000 ppbMaximum Contour 85,000 ppbContour Interval 5000 ppb

-130.80 91.00 312.80 534.60 756.40 978.20 1200.00

IEL SOIL SAS LOCATIONSfa ANB APR, 19M

KHZOC CDNTOUIiS IN PPM0

TAB A

May 17, 1988

MEMORANDUM '

SUBJECT: Data From the February Soil Gas Analyses Performed atthe Industrial Excess Landfill, Uniontown Ohio

FROM: Thomas H. Pritchett, ChemistEnvironmental Response Branch

TO: Julie Mathiesen, Remedial Project ManagerU.S. EPA Region V,

Enclosed you will find five tables which list the results fromthe February soil gas analyses. The results are segregated bythe type of sample (e.g., Traverse along Cleveland Avenue, GasMonitoring Wells, Analyses at the Grid Points, etc.). This datahas been thoroughly reviewed and should be considered final. Theresults- iagged with the^e" flag were from analyse s~p$rformed ohthe bags--by Roy F. Weston's Lionville laboratory immediatelyafter the demobilization. I have compared the results with theGC/MS data and have included the data which I consider the mostreliable. The Photovac analyses were occasionally hampered byinterferences from co-eluting hydrocarbons. I flagged the datawith an "i" when these interferences could not be corrected forusing a confirmation analysis from the more selective GC/MS andGC/ECD methodologies.

Today, I will be finalizing my review of the GC/MS non-targetcompound data and you should be receiving that data a day afteryou receive this data. I am also attempting to print thesetables using our laser printer so that the copies of these tableswill be more legible.

Enclosures

cc: H. AlienR. Turpin

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71 CoElut. 1HHO HNO

STVRENE/x-XVL 0-HYL

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HO NOND NDND HOND NO

667 NOHNO HNO113 nrHND HND

990 9 HHOHNO HHOHHO HHO

ND nr13OO 9 34O 9fiJUO g 42O 9

71 HOHNO HNO

•n.

0LC 9. RESULTS FROH BHBLV5E5 USING THE PRE-EHISTING SfldPLING GRID UniontoMn, OH - F.bru.ru 1966Concentration D«t« (ppb) FroH Fi«ld Photou«e An«l y» <Unl«» Specified OthorMl •«>

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SAMPLE IOENTIFVING5 ...pi.

D**criptio*

ON SITE GRID POINT-ON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTOH SITE GRID POINTOH SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTOH SITE GRID POIHTOH SITE GRID POIHTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTOH SITE GRID POIHTOH SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POIHTOH SITE GRID POIHTOH SITE GRID POINTON SITE GRID POINTOH SITE GRID POINTON SITE GRID POINTOH SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTOH SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINTON SITE GRID POINT•»f. ViVt •uvru fur NTON SITE GRID POINTON SITE GRID POINTOH SITE GRID POINT

O--.it.IHTORnBTION

S.xpl.d

02/10/8802/ 1O/6B02/10/88O2/10/6802/10/8802/10/8602/10/8802/10/8802/10/8802/10/6802/10/8802/10/8602/10/8802/10/8802/10/8602/10/8602/1O/8802/10/8802/10/8602/10/8602/10/8802/10/8802/10/8602/10/6602/10/8602/10/6802/10/8602/10/6802/10/8602/10/8802/10/8602/10/6602/10/8802/10/8602/10/8802/10/8802/10/8802/10/88

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292 292 NO NO0 ND ND NO0 HD NO NO

1016 , 1000 . S3 9,H NO239OO 22900 860 9 140 9

HND HNO HHD HHO260 NO 260 HO

94 9 26 9 28 9 HO177 CoElutol 177 HO

0 HD ND HD0 NO ND ND

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1094 CoElut.: 466 3800 ND NO ND

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383 CoElut. I 214 16997.4 NO HD 97.4

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110 CoElut*: 110 NO387 CoElut.: 387 NOnr nr nr nr

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IBS C

May 25, 1988

MEMORANDUM

SUBJECT: Non-Target Compound Results from the GC/MS Analyses ofSoil Gas Samples Taken at the Industrial ExcessLandfill, Uniontown Ohio

FROM: Thomas H. Pritdiett, ChemistEnvironmental Response Branch

TO: Julie Mathiesen, Remedial Project Managerir.S. EPA Region V (Mail Code 5-HR-ll),

Enclosed you will find two copies of a tabular summary of thenon-target compound results for selected soil gas samples takenin February. The two most prominent non-target compoundsdetected were hydrocarbons and Freon-11 (trichlorofluoromethane)These-results have boon reviewed and the-appropriate notationsand qualifiers have been added. I have also included the QA/QCdata on which I based my notations.

For each sample analyzed, the 10 most prominent, non-targetcompound peaks were selected for spectral interpretation. Whenthe sample was loaded with hydrocarbons, these peaks tended todominate the total ion chromatographes and may have caused theoperator not to select other non-target compound peaks (e.g., MEKor MIPK). Thus, other compounds may have been present but wereidentified because of their lower relative concentrations. Also,the identification of a compound in sample A and the non-identification of the same compound in sample B does notnecessarily mean that the compound was not present in sample B ifsample B contained high levels of other compounds (e.g.,hydrocarbons).

We did find that some cross-contamination was occurring betweensamples. The degree to which this could affect a given samplewas evidently related to the total level of organics present inthat sample. This cross-contamination was noted during the spikeQA/QC analyses. We were finding significant levels of certaincompounds in the samples when those compounds were not present inthe spiking standard (the spike was into zero air). We believethat this trend may be caused by a carrier effect or an increasein bag wall permeability with higher levels of organics. I havereviewed this data for such cross-contamination. Whenever thereported level of a given compound was less than the maximumlevel detected in the zero air blank samples, I dropped the datafrom the table because of the high probability of a falsepositive result. Whenever the reported concentration was greaterthan the blanks but less than the maximum level seen in thestandard spikes, I flagged the data with a "s". The compound mayindeed be present but the reported concentration may be biasedhigh.

Enclosure

cc: H. AlienR. Turpin

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TAB E

INDUSTRIAL EXCESS LANDFILL SITE

Uniontown, OH

July 12, 1988

DCN: TAT-ll-N-149TDD: 11-8802-01APCS: 1111

Prepared for:

Harry Alien, EPA/ERT

Prepared by:

Mark Huston, ERT/TATBrian MacGeorge, ERT/TATKarin Crandall, ERT/ATATL

TABLE OF CONTENTS

1.0 BACKGROUND

2.0 SAMPLING SUMMARY

3.0 ANALYTICAL PROCEDURE

3.1 Soil Gas - Methane Analysis3.2 Soil Gas - Photovac GC

3.4 Soil

4.0 RESULTS AND DISCUSSION

TABLES

1 OVA, Photovac, Preliminary GC/MS Results - Soil Gas2 Photovac Results - Headspace3 GC Equipment, Conditions and Other Materials4 Standards5-6 Vinyl Chloride Response Calibration Data - Soil Gas7 1,1-Dichloroethene Response Calibration Data - Water

Headspace8-11 Photovac BTX Response Calibration Data - Water Headspace

APPENDIX

A Chain of Custody DocumentationB Sample Log (Sampling Times, Run Times and Nos.)C OVA Chart Records (Soil Gas)D Photovac 10A10 Chromatograms (Soil Gas)E Photovac 10S70 Chromatograms (Soil Gas)F Photovac 10A10 Chromatograms (Headspace)G Photovac 10S70 Chromatograms (Headspace)

1.0 Background

Air, soil, and water samples were collected at the• Industrial Excess Landfill Site and surrounding locationsin Uniontown, Ohio, the week of April 18, 1988. ERT/TATprovided on-site OVA and Photovac GC capabilities.

2.0 Sampling Summary

Thirty-seven (37) air samples were collected in one-literTedlar bags, seven (7) water samples were collected(liquid full) in 40 mL VOA bottles with Teflon lined screwcap lids, and four (4) soil samples were collected in 0.5liter glass bottles. Samples were collected by personnelfrom EPA/ERT, EPA/NOAA, and REAC. The samples were

____ ______ delivered to the field lab with chain of custody~ documentation (Appendix A). The samples werre analyzed rrnthe "-field lab April 19-21, 1988 using an OVA and twoPhotovacs (Appendix B - G) . The four soil samples werereturned for complete analysis to the Edison, NJ laboratoryby REAC personnel.

SITE PERSONNEL:

Harry Alien, EPA/ERT Wilma Batz, REACTom Pritchett, EPA/ERT Shekher Subramanian, REACMike Solecki, EPA/NOAA Mark Huston, ERT/TATJulie Mathieson, EPA/RPM Brian MacGeorge, ERT/TAT

Karin Crandall, ERT/TAT

3.0 Analytical Procedure

' 3.1 Soil Gas-Methane Analysis

A Foxboro Organic Vapor Analyzer in the GC mode withFlame lonization Detector was used for air sample,methane concentration determination (Table 3) . ScottSpecialty Gas methane standards were used to determineOVA GC methane response. Concentrations of 4.9 ppm, 10ppm, 100 ppm and 479 ppm were used to set up acalibration range. Sample methane concentrations wereanticipated to be low so the recorder range was set upas 0 ppm to 100 ppm methane. Samples with responsesexceeding the calibration range were diluted withambient air to bring the chromatographic response withinrange. To assure accurate sample quantitation, OVA GCresponse was checked periodically with 10 ppm and 100ppm methane standards. Quantitation was based on peakheight.

Upon receipt, soil gas samples were screened for methaneconcentration using a Foxboro OVA 128 GC. This providedinformation for subsequent GC analysis for chlorinatedorganics by an instrument with a detector adverselyaffected by high methane concentrations. The PhotovacPID, however, was not affected by the high methaneconcentrations present in some of the samples analyzed.

3.2 Soil Gas-Photovac GC

Soil gas samples were stored out of direct light untilanalysis to minimize loss of compounds with lowionization potentials. Two Photovac GCs were used forthe analyses of each gas bag sample (Table 3) . APhotovac 10A10, with an SE-30 3% column, was used toscreen air samples for 1,1-dichloroethene, t-1,2-dichloroethene, trichloroethylene, perchloroethene,benzene, toluene, ethyl benzene, m-xylene, o-xylene,styrene, and m-ethyl toluene. A Photovac 10S70 was

—— —dedicated to screening the -gas -bag—samples ^or vinylchloride. Vinyl chloride analysis was conducted firstand samples were then screened for aromatic compoundsand other chlorinated alkenes.

Photovac analyses were conducted by extracting analiquot from each Tedlar bag sample using a gas tightsyringe and injecting it into the Photovac GC. Aliquotsize varied depending upon organic concentration levelsmeasured by OVA and HNu field analysis. Gas standardswere analyzed periodically to confirm target compoundretention times.

Quantitation of sample vinyl chloride was conducted bythe external standard method. The Photovac 10S70internal microprocessor was programmed for gas samplevinyl chloride quantitation using a series of dilutionsprepared from a Scott Vinyl Chloride Standard(10.12ppmv). A calibration curve illustrating thelinear regression formula utilized by the Photovacinternal microprocessor software was calculated forvinyl chloride response (Tables 5 - 6) . A 45 ppbv vinylchloride standard was injected every 10 to 15 analysesto check vinyl chloride retention time, check instrumentresponse and to recalibrate as necessary. Syringe blankswere run prior to each analysis to monitor and minimizecarryover contamination.

Quantitation of sample analyses for aromatic compoundsand other chlorinated alkenes was also conducted usingthe external standard method. The chromatograms of eachof the samples were compared to chromatograms of ScottGas standard mixture chromatograms for tentative peakidentification and quantitation.

Integity studies of Tedlar bag sample/standard vinylchloride content were conducted by REAC personnel andwill be presented in a separate report.

After Photovac screening analysis, samples were selectedto be drawn through Tenax/CMS tubes for adsoption andsubsequent GC/MS confirmational analysis by ERT/TATpersonnel at the Edison facility. The samples selectedfor GC/MS analysis represented 10% of the total numberof gas samples collected. The sample ID numbers andvolumes placed on the Tenax/ CMS tubes were as follows:

VOLUMEID No. fmll

UT-278-02 100UT-278-03 100UT-278-06 50

———— TJT-278-07 ——————TOO———————————— ~

3.3 Water

The seven (7) water samples collected were stored in acooler packed with ice until analysis. Samplepreparation consisted of pipetting a 20 ml aliquot ofthe sample into a clean, 40 ml VGA vial with TeflonLijQ&d. septum screw cap. The VGA was capped and shakenvigorously by hand for one minute. The vial was thenset aside and allowed to stand inverted, at ambienttemperature, for at least 15 minutes to allow theequilibration of the vapor phase. An aliquot of theheadspace (1.0 ml) was then extracted using a gas tightsyringe and injected into the Photovac GC.

Calibration curves were generated using SupelcoPurgeable A and Alltech BTX (benzene, toluene, ethylbenzene and xylenes) standard mixtures (Table 4) . Stocksolutions (10 ppm) of each standard were prepared.Calibration standards were prepared by pipetting 20 mlof distilled, millipore filtered water into a clean 40ml VOA vial with Teflon lined septum screw cap. Volumesof the standard stock solutions were then added bysyringe to generate the following concentrations (ppb,ug/1) : Purgeable A: 1, 10, 25, 50, and 100; BTX: 10,25, and 100.

Vinyl chloride concentrations of water headspace sampleswere quantitated using the response of 1,1-dichloroethylene, of the Purgeable A mixture.

The calibration curves generated were used to quantitatepeak areas of the water headspace screening analysis(Tables 7 - 11).

3.4 Soil

The four (4) soil samples collected were stored in acooler packed with ice until analysis. Ten grains of eachsample was weighed into a clean 40 ml VOA vial withTeflon lined septum screw cap using a portableanalytical balance accurate to ± 0.1 gm. Ten ml ofmethanol was added and the sample capped and shakenvigorously by hand for one minute to assuresample/solvent dispersion. The samples were then placedin a sonic bath for one hour. The samples were removed,shaken by hand for 45 seconds, and allowed to stand,quiescent, at ambient temperature for at least 15minutes to allow equilibration of the vapor phase. Thenan aliquot of the headspace was extracted using a gastight syringe and injected into the GC.

4.t> "Results

Soil gas and water headspace compounds having retentiontime matches with components of the standards have beententatively identified and quantified (Tables 1 and 2).Only one soil sample headspace (UT-263-04) was analyzedfor BTX by the Photovac 10A10. Only qualitativeanalysis was conducted and benzene and toluene weredetected. No vinyl chloride was detected in the soilheadspace samples.

The preliminary GC/MS data (Table 1) confirms thepresence or absence of vinyl chloride in samples UT-278-02, UT-278-03, UT-278-06, and UT-278-07 as determined byPhotovac field screening. The differences inquantitation may be related to sample volumes placed onthe Tenax/CMS tubes, the nature of the contaminant,and/or the relative nature of the adsobent materials tothe contaminant. The final GC/MS results will bepresented in a separate report.

Interference from a large number of early elutingcompounds prevented detection and quantitation ofbenzene and toluene by the Photovac 10A10 GC, in bothsamples UT-278-06 and UT-278-07. The low Photovacinjection volume of sample UT-278-07, because of thepresence and interference represented by early elutingcompounds measured by the OVA, made detection andquantitation of later compounds with lower responsefactors, in the ppbv range difficult. Also, thereported vinyl chloride concentrations of gas bagsamples UT-278-06, UT-278-07, UT-278-08, and UT-278-09may be less than actual concentrations due to alkaneinterference and peak area integration parameters.

TABLE 1

INDUSTRIAL EXCESS LANDFILL SITE, Uniontown, OH APRIL 19-21,1988

CONCENTRATIONS AS PPBV ( Except Methane )

OVASample Methane

Sample ID Location (ppmv)

UT-262-01UT-262-02UT-262-03UT-262-04UT -262-05UT-262-06UT-263-01UT-263-02UT-263-03UT-278-01_T-278-02f- 278- 03

UT-278-04UT-278-05UT-278-06UT-278-07UT-278-08UT-278-09UT-278-10UT-278-11UT-278-12UT-278-13UT-278-UUT-279-01UT-280-01UT-280-02UT-280-03UT-280-04UT-280-05UT-280-06UT-280-07UT-280-08UT-281-01UT-281-02UT-281-03UT-282-01UT-282-02UT-282-03UT-282-04UT-282-OS

AmbientY9Y8

Yard f 1Yard «2Yard *3SC

SC (Dup)Blank

^ M-02 _ |P-02N-03

H20/888 L-020-02L-04M-03M-02L-03STDN-04STDP-000-01

OFF SITEY6Y5Y2Y1Y4Y3

Y4 (Dup)Y7

P-01N-00MU-7SM-04PARKY5 Dtp

AIR 8 C5BLANK

2107

2375

1-49251010. 1X4.5X10. U7.4X10

2.5X82510

9101081071510210201.4X111187

VinylChloridePV GC/MS

NDNDNDNDNDNDNDNDNDND .__ _ND NDND NDNDND130 BMOL160 54110130NDND

1442NDNDNDNDNDNDND5

ND4NDNDND<122NDNDNDND

BenzenePV GC/MS

NDNDND

NDNDNDND

BMDL 7.7BMDL 9.6NDNDI 460I 73II

4673NDNDNDNDNDNDNANOND9NDNDNDND

BMDL1INDNDNDND

ToluenePV GC/MS

NDNDND

NDNDNDND

BMDL 41BMDL 65BMDL

ND1 190I 89II

4691177NONDND

BMDLNDNANDNONDNDNDNONDND1561NDNDNOND

Ethyl Benzene/m-XylenePV GC/MS

NDNDND

NDNDNDNDND 17ND 32NDND

3490 3100610 21490911459494

NDNDNDNDNDNDNANDNDNDNDNDNDNOND

2063NONDNDNOND

Styrene/o-Xylene

PV GC/MS

NDNDND

NDNDNDNDND 18ND 44NDNDI 204

ND 53555ND8988NDNDNONDNDNDNANDNDNDNDNDNDNDNO637NDNDNDNDND

m-EthylToluene

PV

NDNDND

NONONDNDNDNDNDND0

NRD

NDNDNDNDNDNDNDNRNANRNDNDNDNONRNDNDNRNDNONDNDND

GC/MS

29100

16011

PV Photovac GC/P10HA Not Analyzed, Valve on Tedlar Bag Not Closed.NO Not Detected.BMDL Response detected, below Minimum area of quantisation.D Detected, not quantitated.I Interference. Large number of peaks, or peak areas, tailing - at the RT of target peaks.NR Not Run, RT not analyzed.

TABLE Z

INDUSTRIAL EXCESS LANDFILL SITE, Uniontown, OH APRIL 88

UATER SAMPLE HEADSPACE CPP8]

Etthyl Benzene/Vinyl

Sample ifr Chloride"

UT-263-05UT-263-06UT-263-07UT-263-08UT-263-09UT-263-10UT-281-04

NONDNDNDNDND1

Benzene

NDNDNOND<10NO160

Toluene

<10NDNDND<10ND135

m,p-Xylene(coelute)

NONONONONONO1728

o-xylene

NDNONONONONO1442

1,1 -DCE

NONDNDNONONO

Interference

TCE

NONONONONDND13

PCE

NONONDNDNO<10ND

Chlorobenzene

<10NONONDND<1053

• Quant itsted by response of 1,1-Oichloroethene.NO : Not Detected, <1 ppb vinyl chloride, <10 ppto<10 : Detected, but below calibrated minimum.

UT-263-04 (SOIL) I NO NO NO Interference ND ND NO

TAB F

mmntmttt ttt«t»t»«»tmmt m 11 u < i it mtFINAL VERSION OF SOIL GAS(AS OF 7/5/88)

, UNIONTOHN, OHIO

StapleID I COORO Y COORD

01AS -123.9 926.302AS -139.9 893.403AS -151.2 843.104AS -160.4 795.105AS -161.1 760.906AS -167.9 688.1C7AS -179.8 644.408AS -187.3 599.6(WAS -195.1 545.210AS -202.3 501.2HAS -211.1 448.312AS -218.7 39713AS -225.5 347.5

I4ASI1 -229.5 296.515AS -237 246.916AS -242.8 220.417AS -250.1 1451BAS -173.9 B3.7I9AS -264 45. 120AS -267.2 4.521AS -273.8 -43.8

22A5I1 -283.8 -101.22JAS -286.3 -134.2

2N -113.4 1087.5IN -102.7 1143.74N -99.2 11B6.6

SWLE IDENTIFY' INFORMATIONSacple Sa*ple Sampled

Type Descrip'"»> Date

Ir South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Froi AO Next to Cleveland 02/09/88Tr South Froi AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next '° Cleveland 02/09/88Tr South Froi AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro. AO Next to Cleveland 02/09/88,Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Froi AO Next to Cleveland 02/09/88Tr South Fro« AO Next to Cleveland 02/09/88Tr South Fro. AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/BBjTr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr South Fro* AO Next to Cleveland 02/09/88Tr North Fro* AO Next tD Cleveland 02/09/88Tr North Fro* AO Next to Cleveland 02/09/88!Tr North Fro* AO Next to Cleveland 02/09/88

OVANethane

PFfl

------

1478---

208

1056

1148

1117--

8.6-

On -siteResults

1LEL Te*p.j 1 i i 1 1 ! 1 1 ! I

0 35.30 33.20 33.60 32.30 35.80 37.40 37.90 35.60 38.90 39.10 37.60 38.60 37.60 35.20007 37.00

0.003 -00000 37.5- 37.8

VINYLCHLORIDE

Ht+ttttHt

1

1

0101

00

iii

0i

000

100

111i

0

Concentration Data (ppb) Fro* Field Photovac Analyses (Unless Spec Total *'''" '''- M.1- *-eTHYL C2 Alkyl tE-BENZENE/ STYRENE/

Ned (e) DCE DCA (e) TCE TCA (e) PCE BENZENE TOLUENE TOLUENE Aro*at. t o-XYLENE o-XYLENEtt*»»M.«t»«Mtt********t*HmM*l»ttf*t»H»»H«*t«t*M»Hm4»t«Ht»M»«»*HH»H«*»t«f«f*»t»«*t«lt«

0 0 0 0 0 0 10.7 13.8 0 0 -0 0 0 0 0 0 0 7 0 0 -o o o o o o o o o o -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 0 0 0 o - -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 1 0 0 0 -o o o o o o o o o o -0 0 0 0 0 0 0 0 0 0 -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 0 0 0 0 -0 0 0 0 0 0 1 2 2 . 5 0 0 -0 0 0 0 0 0 0 0 0 0 -o o o o o o o o o o -o o o o o o o o o o -0 0 0 0 0 0 1 1 0 0 -o o o o o o o o o o -0 0 0 0 0 0 0 1 0 0 -0 0 0 0 0 0 - - - - -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 1 1 0 0 -0 0 0 0 0 0 1 1 0 0 -o o o o o o o o o o -

5N -93.6 1226.86N -86.9 1286.47N -79.2 1335.5AO -125.3 991.6

NE01 100.1 1045.7NE02 154.9 1041.6NE03 200.7 1040.2NE04 249.9 1036.2NE05 299.1 1036.2NE06 34B.2 1032.1NE07 395.1 1033.5NE08 451.2 1022.5NEW 500.4 1022.5NE10 546.1 1017.1NEll 600.9 1021.1NE13 697.5 1020.9NE15 814. B 1024.1NE17 898.9 1024NE19 998.5 1018.2NE21 1097.3 1014.3NE23 1199.4 1017.6

A01 100 1000A03 300 1000A05 500 1000A07 700 1000A09 900 1000All 1100 1000602 200 900B04 400 900B06 600 900BOB 800 900BIO 1000 900B12 1200 900

Tr North Fro* AO Next to ClevelandTr North Fro* AO Next to ClevelandTr North Fro* AO Next to ClevelandTr At the entranceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fenceTr East Traverse along North fence6r On-site Grid PointGr Qn-site Grid Point6r On-site Grid PointGr Qn-site Grid Point6r On-site Grid PointGr On-site Grid PointGr On-site Grid PointGr On-site Grid PointGr On-site Grid PointGr Qn-site Grid PointGr fln-site Grid PointGr Qn-site Grid Point

02/09/8802/09/8802/09/8802/09/8802/09/8802/09/88K/09/B8)2/09/8B02/09/8802/09/88J2/09/8802/09/8832/09/8802/09/8802/09/8802/09/88H/09/B8)2/09/8852/09/8832/09/8832/09/8802/10/8802/10/8802/10/8802/10/8802/10/8802/10/8802/10/8802/10/8802/10/8802/10/8802/10/88P2/ 10/88

------

142500

3IB34

1185288

583333----

I43S----

129664B1

1092591296

-44

805555629630

7407

l!!!!!i !! !H0 37.5- 37.80 39.50 31.60 3B.70 39.10 38.60 38.30 39.00 38.70 42.00 41.3

MOO 43.30 42.3

MOO -MOO -20 -100 -

MOO -20100 -0 37.8

260 37.218 33.21 37.8

29 38.28470 34.160 33.00 31.5

MOO 31.4MOO 33.260 43.7

iii

00100

1010

1---

11

ii

0iiii

0i

0i240

0i

0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 1 13.9 0 00 0 0 0 0 0 1 1 0 00 0 0 0 0 0 1 1 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 1 1 0 00 0 0 0 0 0 4 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 1 1 0 00 0 0 0 0 0 1 4 0 0 10 0 0 0 0 0 1 1 0 0

3 0 0 0 0 4 7 7 0 0 0 00 0 0 0 0 0 1 1 0 00 0 0 0 0 0 1450 0 0 00 0 0 0 0 0 2430 247 - 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 340 390 g 0 41600 0 0 0 0 0 11.3 10.4 0 00 0 0 0 205 0 1400 1600 0 11150

0 - 0 - 0 0 0 - 00 0 0 0 0 1 5 2260 0 - 00 0 0 0 0 0 9 7 0 - 00 0 0 0 0 0 7 0 - 00 0 0 0 0 0 27.5 25.5 0 9 9 20 0 0 0 0 0 0 . 0 0 00 0 0 0 0 0 0 1 0 00 0 0 0 0 0 5 2 3 4 0 00 0 0 0 0 0 1 1 0 00 0 0 210 120 75 6700 47000 800 54600

130 0 210 19 17 100 0 0 0 00 0 0 0 0 36 135 43.7 240 408

C01 100 800C03 300 BOOCOS 500 800C07 700 800C09 900 800

C11I1 1100 BOOD02 200 700004 400 700006 600 700

D08I1 800 700010 1000 700012 1200 700E01 100 600E03 300 600EOS 500 600E07 700 600E09 900 600Ell 1100 600

F02I1 200 500F04 400 500F06 600 500FOB 800 500F10 1000 500601 100 400S03 300 400605 500 400GO? 700 400fc/) 900 400*: .TO 300nu4 400 300HU» 600 3uOnut 800 300H10 1000 300

Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/86Gr On-site Grid Point 02/10/86Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/86Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/BBGr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr Qn-site Grid Point 02/10/88Gr On-site Grid Point 02/10/98Gr On-site Grid Point 02/10/86Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-Slte Grid Point 02/10/98Gr Qn-site Grid Point 02/10/18Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/88Sr Dn-sile Grid Point 02/10/88Gr On-site Grid Point 07/10/88

574073888

722222288888

3666425925

8611125000066666350008703

20318500

2300009000

3407402960

9629628700

75000089000

20000066700027300033333

250000620000

200-

231750000

-500000

460 38.00 33.5

602 39.6580 40.10 37.6

312 41.3MOO 43.7MOO 33.3

0 32.1MOO 33.322 34.40 33.6

770 39.2750 34.210 41.4550 -32 39.5609 33.0

30 • 31.4MOO 35.4MOO 35.4MOO 37.6MOO 38.5>300 39.0250 40.6500 37.1580 37.80 39.50 33.2

MOO 34.5MOO 34.0MOO 32.3MOO 30.3

jii

00

iiiiii

01i

iiiiiiiiii

0iii

0 0 0 0 0 0 6 6 2 8 4 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 71.9 3 6 6 0 2 5 20 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 9 3 4 5 0 i 0 10180 0 0 0 0 54 25000 530 0 239000 0 0 0 0 0 1120 0 0 00 0 0 0 0 0 0 1 2 0 2 6 00 0 0 0 0 0 2 9 6 2 5 0 5 40 0 0 0 0 0 0 0 0 1 7 70 0 0 0 0 0 0 0 0 00 0 0 0 0 0 2070 0 0 00 0 0 0 0 0 12900 0 8 5 9 99580 0 0 0 0 0 5 2 3 7 0 2 0 00 0 0 0 0 0 0 0 6 10540 0 0 0 0 0 19.8 13.4 0 00 0 0 0 0 0 14000 0 0 50000 0 0 0 0 0 1 8 7 1 0 00 0 0 0 0 0 2000 0 0 10000 0 0 0 0 0 1170 1590 0 2350

16000 0 0 34 0 42 114000 11900 0 163700 0 0 11 0 302 35900 1410 0 394000 0 0 11 0 24 1840 1610 0 123000 0 0 62 0 0 8930 9835 0 310000 0 0 0 0 0 1220 9620 0 201000 0 96 14 14 9 16200 14400 0 3830 0 0 0 0 0 5340 0 0 57.4

1 701 - 0 210 515 1390 2090 0 0 0 0 0 0 3 4 0 91.60 0 0 21 0 0 1360 0 0 1100 0 0 0 0 0 2160 1 5 2 0 3 8 70 0 0 0 0 0 1020 4 7 5

_

--------------------------------

H12 1200 300Jl 100 200J3 300 200J3 500 200J7 700 200J9 900 200K02 200 100K04 400 100K06 600 100K08 800 100LI 100 0L3 300 0L5 500 0L7 700 0L9 900 0IWO -130.8 -46.4N01 63 -49H02 198.5 -24.7N04 400.3 -25.6n08 800.8 -25.8

H10GPTOON10GPT10HIOGPT30H10RPTOOH10RP110N10RPT30KioypTio

NH-OLSNH-02SItHOSHH-llS

6N10GGN106

A^ ^Mfl ^MM^ BtM^B

fir Qn-site 6rid Paint 02/IO/Bfir Qn-site Grid Paint 02/10/8fir On-site Grid Paint 02/10/66r On-site Grid Point 02/10/G6r On-site find Point 02/10/8

11I1I

fir Qn-site Grid Point 02/10/86fir On-site Grid Point 02/10/Bp6r On-site Grid Point 02/10/86Gr On-site Grid Point 02/10/886r Qn-site Grid Point 02/10/BBfir On-site Grid Point 02/10/8fir On-site Grid Point 02/10/88Gr On-site Grid Point 02/10/BBBr On-site Grid Point 02/10/88fir On-site Grid Point 02/10/86Gr Off-siU Erid Point (South End) 02/10/fleGr Off-site Grid Point (South End) 02/10/88Gr Off-site Grid Point (South End) 02/10/88Gr Off-site find Point (South End) 02/10/98Gr Off-site Grid Point (South End) 02/10/1

Pq> Tst Hell 10, Puq> Test, Green, T-0 02/09/1Pip Tst Hell 10, PIMP Test, Green, T-10 02/09/iP«p Tst Hel) I®, Pu*> Test, Green, T-30 02/09/iPip Tst Hel 10, Pu*> Test, Red, T-0 02/09/1Pip Tst Hell 10, Pu*> Test, Red, T-10 02/09/1P«p Tst Hell 10, Pinf Test, Red, T-30 02/09/1Pip Tst Hell 10, Pu*> Test, Yella,, T-10 02/09/1

GHHN Groundmter Hon. Hell 02/10/1

8BBB18B18en

GUHU firoundMter Nan. Hell 02/10/88SHW firotindwter Hon. Hell 02/10/1SWHH firaundwter Hon. Well 02/10/1

GHH Gas Hell, W-10, Green, 14 - 15' 02/09/1GNU Gas Hell, HH-10, Green, 14 - 15' 02/09/

o

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1333683333666667

13333833

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-500000

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17000001200

-7

20850000293338167

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192542129629

-740

13007

938

100000100000

0 38.2>500 39.478 36.830 33.610 35.0

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0 33.3MOO ->500 37.1>500 36.0>500 37.3

18 36.3148 39.20 37.00 30.0

MOO 22.00 33.10 33.1

-2 -

0200 -

170

140 -5 -000

110 0110 0

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0 0 0 0 0 0 18.7 10.5 0 00 0 0 0 0 0 1BOO 6 3 1 0 00 0 0 0 0 0 3 2 9 0 0 13.50 0 0 0 0 0 1 1 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 2030 854 0 2210

1300 0 0 50 240 100 6450 13480 0 00 0 0 0 0 0 1750 0 0 10500 0 0 0 0 0 1670 0 0 46600 0 0 0 0 0 1622 265 0 60700 0 0 0 0 0 433 0 0 71400 0 0 0 0 0 6 2 0 6 5 0 0 36400 0 0 0 0 0 6 0 6 0 4920 0 00 0 0 0 0 0 0 0 - 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 1 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 5 8 5 0 0 2 4 6 00 0 0 0 0 0 35.3 0 0 00 0 0 0 0 0 14.1 0 0 00 0 7 5 0 0 0 5 6 0 0 00 0 0 0 0 0 0 0 - 0

0 - 0 0 0 0 00 0 110 7 0 5 1170 0 0 00 0 0 0 0 0 4 9 1 0 0 00 0 0 0 0 00 1 0 0 0 0 1 0 0 00 0 0 0 0 0 1 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 1 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0

-

-------------------------

GH10GGH10RGH10R6H10RGH10VGH10V6H10VBH12GGH12RGH13GGH13R6H13VBH146GN1406UI4VGU15GBN15R6N15Y6W1BGH1GBU1R6W1YGW2BW?6CM2RGV2VGU36S»3RBU46BM4A6*4 V6N5GBW50

BMWem6NH6WBHtBNH6HHGNHGNUa*6NHem6HHGNHBNHBMWBHH6HU6MNGNH6NNBHMBWamGNHawBMGNHGNHGHHBIWGNHBIW

Bas Hell,Sis Hell,Gas Hell,Bas Hell,Bas Hell,Bas Nell,Bas Hell,Gas Hell,Bas Hell,Bas Hell,Gas Hell,Gas Hell,Bas Hell,Gas Hell,Gas Hell,Gas Hell,Gas Hell,Bas Hell,Gas Hell,Bas Hell,Gas Hell,Bas Hell,Gas Hell,Gas Hell,Gas Hell,Bas Hell,Bas Hell,Sas Hell,Gas Hell,Bas Hell,Gas Nell,Gas Hell,Bas Hell,

HH-10, Breen, 14 - IS'MH-10, Red, 4 - 7'NH-10, Red, 4 - 7 'IK-10, Red, 4 - TNH-10, Vellon, 24 - 25NH-10, fellow, 2 4 - 2 5NH-10, Yellox, 24 - 2512, Breen, 5 - 4 '12. Red, 13 - 14'13. Brew, 14 - 15'13, Red, 4 - 7'13, VelloN, 24 - 25'NH-14, Breen, 14 - 15'IW-14, Orange, 4 - 7 'NH-14, Yellw, 24 - 2515, Breen, 14 - 15'15, Red, 4 - T15, felloH, 2 4 - 2 5 '1, Blue, 42'1, Green, 121, Red, 5'1, Yell*, 24'NH-2, Blue, 27'HH-2, Breen, B'HH-2, Red, 4Ht-2, Vellon, 17'IW-J, Green, 8'NH-3, Red, 44, Breen, 2 0 - 2 14, Red, 9 - 1 0 '4, relloi., 39 - 40'NH-5, Breen, 2 2 - 2 3 'IW-5, Orange, 9 - 10'

02/10/8802/09/8802/10/8802/09/88

' 02/09/88' 02/09/88' 02/10/88

02/09/8802/09/8802/09/8802/09/8802/09/8802/09/8802/09/88

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i 0 0 0 0 0 0 1 1 0 0 » -i 0 0 0 1 0 10.4 0 1 0 0 t -1 0 0 0 0 0 0 1 0 0 0 « -1 0 0 0 0 0 0 0 1 0 32.5 « -! 0 0 0 0 3 0 2 5 1 0 0 0 *; o o o o o o o o o o * -

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ParkL2 200 0L3 300 0U 400 0112 198.5 -24.71C 299.8 -26.1

GW Gas Hell, 6, Green, 14 - 15' 02/09/88GW Gas tell, 6, Red, 6 - 7' 02/09/88GW Gas Hell, 6, VellQN, 24 - 25' 02/09/88ft* 6as Hell, nU-7, Green, 14 - IS' 02/09/88GW Gas Hell, NH-7, Red, 6 - 7' 02/09/88GW Gas Hell, HH-7, YellOH, 2 4 - 2 5 ' 02/0<^B8GW IMS Hell, 8, Green, 14 - 15' 02/09/88GW Gas Hell, 8, Red, 6 - T 02/09/88GM Gas Hell, 8, Yellon, 2 4 - 2 5 ' 02/09/86GMI Gas Hell, 9, Green, 14 - IS' 02/09/88GW Gas Hell, 9, Red, 6 - T 02/09/88ErM Gas Hell, 9, VtllQN, 24 - 25' 02/09(88EH Extraction Hell Syste* 02/10(88EH Extraction Hell Sytte* 02/10/88EU Extraction Hell Syste* 02/10/88EM Extraction Hell Syste. 02/10/88EU Extraction Hell Syste* 02/10(88EH Extraction Hell Syste* 02/10/88EU Extraction Hell Syste* 02/IO/BBEU Extraction Hell Syste* 02/10/88EU Extraction Hell Syste* 02/10/88EH Extraction Hell Syste* 02/10/88EH Extraction Hell Syste* 02/10/88EU Extraction Hell Syste* 02/10/88

Alb. Muent Air at Grid Loc. A-6 02/09/88AM). A*b!ent Air at Grid Loc. D-4 02/10/88Art). Attient Air at Grid Loc. 6-1 02/10/88A>b. Albient Air at Park 02/10/88Gr On-site Grid point 04/19/88

GrIRpt.) On-site Grid point 04/19/88fir Qn-site Grid point 04/19/88

BrlRpt.l Wf-site Grid Point 04/19/88Gr Off-site Grid Point 04/11/88

7118

1800230060003480

41000565631

18.5277777481000237000416000275925170370159259

33322222222000170370163000

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810 0 0 0 0 44 1120 324 - 113 * - '570 0 0 140 0 130 552 222 0 0 t -

0 0 0 100 0 53 810 1300 0 590 t2100 0 0 300 8 787 2780 1570 0 0 • -460 0 0 34 20 21 1640 734 0 0 * -

0 0 0 0 0 0 0 0 - 0 « -720 0 0 120 0 100 1800 3300 0 2390 « -850 0 0 120 65 100 3800 4200 0 3220 t

1200 0 0 34 32 87 1170 113 0 71 t -6 1 0 0 0 0 0 0 8 0 1 0 0 O i -

0 0 0 0 0 0 0 0 0 0 « -0 0 0 0 0 0 0 0 0 O f -0 0 0 0 0 0 1 4 1 7 0 19.6 t -0 0 0 0 0 0 0 0 - 0 » -

0 0 0 0 « 0 0i i 0 1145 I 1145 0460 190 160 3694 * 3490 204i i d 1464 i 909 555

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H4 400.3 -25.6NOO -110.1 -272N2 208.6 -64.7N3 323.5 -70.7N4 396.1 -105.101 -15.9 -293.502 214.3 -133.7PO 72.2 -301.6PI 140.5 -273.1P2 185.1 -213.3SC 396.1 -382.9Yl 91.5 1066.7Y2 234.1 1052.5Y3 325.2 1052.5Y4 410.9 1047.4Y5 184.5 1266Y6 143.7 1264.5Y7 145.3 1306.6YB 196.3 1371.4Y9 186.7 1339.6

ErlRpt.) Off-site Brid Point 04/J19/B8Br Off-site Grid Point 04/19/686r Off-site Srid Point 04/J19/8Bfir Off-site Grid Point 04/JI9/8B6r Off-site Brid Point 04/J19/88Tr Off-site South Periieter Transect 04/119/88Tr Off-site South Periieter Transect 04/19/88Tr Off-site South Periieter Transect 04/19/88Tr Off-site South Periaeter Transect 04/19/8(1Tr Off-site South Periieter Transect 04/19/88Tr Off-site South Periieter Transect 04/ 9/BflYd Yard Along North Site Perneter 04/|9/88Yd Yard Along North Site Periieter 04/19/86Yd Yard Along North Site Periieter 04/Yd Yard Along North Site Periieter 04/Yd Yard Along North Site Periieter 04/Yd Yard Along North Site Periieter 04/

9/889/889/889/88

Yd Yard Along North Site Periieter 04/(9/88Yd Yard Along North Site Periieter 04/19/88Yd Yard Along North Site Periieter 04/ 9/88

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-_-----------------

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