drilling plan sunrise mountain landfill geohydrologic ...drilling plan sunrise mountain landfill...

DRILLING PLAN

Sunrise Mountain Landfill

Geohydrologic Drilling Program

Locations 7,13, and 15

Prepared on behalf of:

Republic Services

of Southern Nevada

Prepared by:

SCS ENGINEERS

2702 North 44th Street, Suite 105B

Phoenix, Arizona 85008

(602) 840-2596

August 23,2001

10199007.01 Task 4

SFUND RECORDS CTR

2066433

August 2001 © 2001, SCS Engineers

TABLE OF CONTENTS

TABLE OF CONTENTS

LIST OF TABLES

INTRODUCTION AND PURPOSE

SECTION 1 Project Management and Communication.

1.1 THE PROJECT TEAM

1.2 PROJECT MEETINGS

1.2.1 Implementation Meeting

1.2.2 Daily Briefing

1.2.3 Weekly Meetings/Teleconferences

1.2.4 Progress Meetings

1.3 PROGRESS REPORTS

1.3.1 Daily Field Logs

1.3.2 Progress Reports

1.4 VARIANCE PROCEDURES

1.5 DRILL RIG DESCRIPTIONS

SECTION 2 LOCATION 13

2.1 HISTORY AND BACKGROUND

2.2 DRILLING PLAN FOR LOCATION 13

2.2.1 Discussion of Plan









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Sunrise Mountain LandfillGeohydrologic Drilling Program

SCS ENGINEERS10199007.01 Task 4

August 2001 ©2001, SCS Engineers

LIST OF TABLES

TABLE 1: PROJECT TEAM 1




INTRODUCTION AND PURPOSE

Drilling activities were initiated at locations 7, 13, and 15 at the Sunrise Mountain Landfill(Site) during the 2000 calendar year. This work was to be conducted in accordance with theSite Sampling and Analysis Plan, as contained in the USEPA-approved Work Plan datedFebruary 29, 2000. Technical difficulties were encountered during the course of work atlocations 7B, 13A, 13B, and 15A and these boreholes were abandoned. A letter fromUSEPAdated June 18, 2001 indicated that abandoning these boreholes (7A, 13A, and 15A) was adeviation from the Work Plan and that the boreholes must be re-drilled and new wellsinstalled at these locations. Technical issues were also indicated concerning drillingprocedures at location 13B.

SCS Engineers (SCS) has been engaged by Republic Services of Southern Nevada (RSSN) toassist in the implementation of appropriate drilling, sampling, and well installation proceduresaccording to the previously approved Work Plan at locations 7, 13, and 15 during the summerof 2001. The scope of SCS' work is to provide project management and technical assistanceto ensure this work is completed, and new wells installed in accordance with the previouslyapproved Work Plan and subsequent revisions and technical memorandums currently in effectincluding Geotechnical Environmental Services' June 19, 2001, revised Work Plan. The termWork Plan as used herein means the previously approved Work Plan and subsequent revisionsand technical memorandums currently in effect.

Sunrise Mountain Landfill iiiGeohydrologic Drilling Program


SECTION 1 PROJECT MANAGEMENT AND COMMUNICATION

SCS recognizes the importance of diligent technical and administrative management of thiswork, and has therefore committed the necessary resources the carry out the work in anefficient and professional manor. SCS will pay particular attention to communication issues,not only between our project team, but also among other stakeholders including Clark County,Bureau of Land Management (BLM), and United States Environmental Protection Agency(USEPA) and their oversight contractor (S AIC).

1.1 THE PROJECT TEAM

Table 1 shows SCS' Key Personnel and Contractors assigned to this project.

Table 1: Project Team

Project Director

Technical Project Manager

Field Project Manager

QA/QC Manager

Field Geologist

Drilling Contractor

Geophysical Logging Contractor

Contract Laboratory

Stephen Smith

Mark Varljen

Derek Reeve

Stephen Smith

Jason Kahlert

Layne

COLOG

NEL

1.2 PROJECT MEETINGS

1.2.1 Implementation Meeting

SCS will start overseeing the current drilling activities on Monday, July 9, 2001. An initialmeeting of the Project Team will be held on July 9, 2001 to discuss current and future drillingactivities at the Site.

An implementation meeting, attended by all team members, will be conducted once thisDrilling Plan is approved by the USEPA. The implementation meeting will open lines ofcommunication and familiarize all project team members with site issues, expectations,project processes and procedures.

1.2.2 Daily Briefing

The Field Project Manager, the Field Geologist, and the Drilling Contractor will assemblebriefly every day after the day's work to summarize the progress, highlight any difficulties orsafety issues, and set objectives for the upcoming day's work. The day's activity and boringlogs will be submitted to the Field Project Manager, who will compile this information, andbe responsible for submittal of daily field logs.


SfoS. ENGINEERS10199007.01 Task 4


1.2.3 Weekly Meetings/Teleconferences

The Field Project Manager, the Field Geologist, QA/QC Manager, and Technical ProjectManager will hold a teleconference weekly to review geologic logs, assess progress, resolvetechnical issues, and update the schedule, as necessary. Decisions to plug-off particular zonesor proceed with well construction, or to initiate a Variance Request (as discussed in section1.4) will be specifically addressed during these meetings. The drilling and geophysicallogging contractor may participate in these meetings, as necessary.

After the weekly teleconference, the Field Geologist will update the boring tracking log. Theboring tracking log is a spreadsheet data base system, and an example of its content ispresented in Attachment A. SCS will add additional data to the boring tracking log, forexample, when an elog was performed along with the date and footage. Additionalsuggestions for data inclusion on the boring tracking log from the stakeholders are welcome.

1.2.4 Progress Meetings

The Project Director, Technical Project Manager, Field Project Manager, and Field Geologistwill meet on-site, as needed, to resolve any "big picture" issues, brief interested stakeholderson project progress and issues, and obtain stakeholder input as necessary. The drilling andgeophysical logging contractor may participate in these meetings, as necessary.

1.3 PROGRESS REPORTS

1.3.1 Daily Field Logs

Daily written logs will be completed by field staff and submitted to the Field Project Managerat the completion of each day. The Field Project Manager will compile the daily logs andtransmit them to the Technical Project Manager, RSSN, USEPA and/or their designee forreview by the following business day.

1.3.2 Progress Reports

At least once per month, an updated boring tracking log will be emailed to interestedstakeholders.

1.4 VARIANCE PROCEDURES

If site conditions or other circumstances indicate that it may be desirable to deviate from theWork Plan, EPA will be notified. This notification, approval, or modification will bedocumented. This documentation will include the circumstances leading to the request,details of the proposed change, reason for the change, and approvals or modifications to therequest.

1.5 DRILL RIG DESCRIPTIONS

There will be two drill rigs utilized on site for the completion of this drilling program, anIngersol Rand T4W and a Schramm 685W. Both rigs are a multi-drill platform capable ofreverse air rotary, air core, mud rotary and direct drive. Both rigs have 70,000 poundpullback strength, on-board air compressors and will be tooled with 5 '/z-inch dual wall

Sunrise Mountain Landfill 2 •*IS£l3£I£ilU£lil3l ^ *Geohydrologic Drilling Program 10199007.01 Task 4 m~


reverse air pipe and 2-inch down hole wire line drop hammer with split spoon samplers.Additionally, 7 Vi-inch drill pipe will be available forburningf the heavier hole opening bitsand tricones. The Schramm 685W is also equipped with a drill under casing system that iscapable of setting 10-inch or 8-inch casing directly behmd"t1ie>drilT6if.

SCS ENGINEERSSunrise Mountain Landfill 3Geohydrologic Drilling Program 10199007.01 Task 4




The first boring (GH-13A) at this location was started on June 29, 2000. GH-13A has thefollowing coordinates and elevation: Northing 11,466.38; Easting 10,166.27; and 1,877.61Elev. On June 29, 2000, GH-13A was advanced from 0 to 149 feet below ground surface(bgs) (1,877.61 to 1,728.6 Elev). On June 30, 2000, GH-13A was advanced from 149 to 184feet bgs (1,728.6 to 1,693.6 Elev). At this elevation, apparently water was encountered in theboring. Mr. Hakkila performed the logging on June 29 and 30, 2000. Mr. Martin re-loggedthe 0 to 184 feet bgs on February 27, 2001 based on review of cores in storage.

On July 5, 2000 (6:25 a.m.), the water level in GH-13A was recorded at 181.56 feet bgs(1,696.05 Elev). On July 7, 2000, a water sample was obtained from the borehole. A reviewof the analytical data from the July 7, 2000 water sample indicated that several metals(chromium reported at 0.017 mg/L) and anions were detected and that for all the organiccompounds analyzed, acetone had the only detection (reported at 0.034 mg/L). Constituentsanalyzed in this sample were below their corresponding MCL's (NEL ID #L0007048 sampledJuly 7, 2000).

On August 8, 2000, borehole GH-13A was reamed out and a 14-inch casing was installed andcompleted on August 9, 2000 to a depth of 184.5 feet bgs (1,693.1 Elev).

On August 14, 2000, advancement of borehole GH-13A resumed through the 14-inch casingfrom 184 to 329 feet bgs (1,693.6 to 1,548.6 Elev). On August 15, 2000, borehole GH-13Awas continued from 329 to 453 feet bgs (1,548.6 to 1,424.6 Elev). On August 16, 2000,borehole GH-13A was continued from 453 to 477 feet bgs (1,424.6 to 1,400.6 Elev). Mr.Cooke performed the logging on August 14,15, and 16, 2000. The following water levelmeasurements were obtained from GH-13A after advancement to 477 feet bgs (1,400.6 Elev):

Time

X

UNKNOWN

8:30

7:55

7:20

14:20

6:20

6:30

10:10

10:45

Date

09/01/2000

09/13/2000

09/20/2000

09/25/2000

09/26/2000

09/27/2000

09/28/2000

10/02/2000

10/18/2000

Boring Depth,(ft) bgs

477

477

477

477

477

477

477

477

477

Water Level,(ft) bgs

293.40

292.42

272.52

255.42

251.40

249.80

305.50

258.45

240.0

Water Elevation,(ft)

1584.21

1585.19

1605.09

1622.19

1626.21

1627.81

1572.11

1619.16

1637.61

Note: Water was first reported in GH-13A at 184 feet bgs (1,693.6 Elev).


SCS ENGINEERS

10199007.01 Task 4


On September 27, 2000, a water sample was obtained from borehole GH-13A from 8:00 to8:30 a.m. There was one sample, one duplicate, and one rinseate sample collected andanalyzed. A review of the analytical data from the September 27, 2000 water sampleindicated that several metals and anions were detected, and that there was no detection of anyanalyzed organic compounds. Chromium (dissolved) was reported as non-detect (NEL ID#L0009303, #L0009304, #L00093'05 sampled September 27, 20*05). * '""" '

It has been reported that on September 27, 2000, the T4W* drill rig was set up at GH-13A toapparently advance the boring. During the process of blowing out the water prior to drillingadvancement, a decision was made at approximately 14:30, or slightly later, not to advancethe boring. The T4W drill rig was removed from location 13.

On October 18, 2000, USEPA representatives were at the Site. They had requested thatgroundwater samples be taken from various locations so that they could observe monitoringprocedures and obtain a set of split samples. One borehole selected was dOf-PlSA. X*watersample was obtained from borehole GH-13A on October 18, 2000 and splitVitfi USTEiPArepresentatives. On October 18, 2000, a water level measurement taken in GH-13A indicateda water level at 240.0 feet bgs (1,637.61 Elev). A review of the analytical data from theOctober 18, 2000 water sample analyzed by NEL indicates that several metals (chromium,dissolved reported at 1.28 mg/L) and anions were detected, and that there was no detection ofany analyzed organic compounds (NEL ID #L0010235 sampled October 18, 20*00). Asreported by NEL, the level of chromium appears to be above its MCL of 0.1 mg/L. Thereporting of this chromium value may be a laboratory error as no other water samplesperformed by NEL are in this range. For verification purposes, SCS would like to request thatthe USEPA review their records, and provide a copy of the results for the corresponding splitsample.

The second boring (GH-13B) at this location started on December 4, 2000. GH-13B has thefollowing coordinates and elevation: Northing 11,455.60; Easting 10,183.3^1; and 1,885.67Elev. On December 4, 2000, GH-13B was advanced from 0 to 159 feet bgs (1,̂ 85.6*7 to1,726.7 Elev). On December 5, 2"000,"GH-t3fi was'advanced from 1$ to 189 feet bgs(1,726.7 to 1,696.7 Elev).

On December 6, 2000, a water level measurement taken at 6:45 a.m. from GH-13B indicateda water level at 189.10 feet bgs (1,696.57 Elev). TneTlogging Geologist reported about 6-inches of water in the borehole on the log. On December 6, 2000, GH- 13B was advancedfrom 189 to 256 feet bgs (1,696.7 to 1,629.7 Elev). On December 1, 2000", pft-T3B wasadvanced from 256 to 269 feet bgs (1,629.7 to 1,616.7 Elev). 6n December ,8* StRSf (Friday),GH-13B was advanced from 269"td 3*d7Teer%s*(l76i*6.fTo I,578!'7filev)?t3n December 11,2000 (Monday), GH-13B was advanced "from 507 to*32YfeeVb"gs (l,S7o?7''to'l35ot!TEIev).The drilling was discontinued at 13:50 on December 11, 200*0. Mr. Jackson performed thelogging of GH-13B.

On December 11, 2000, a water sample was obtained from borehole GH-13B from 10:00 to10:15 a.m. On December 11, 2000, a water level measurement indicated the water level to beat 307 feet bgs (1,578.7 Elev). A revieVdfthe analytical data from the December 11', 2000water sample indicated that for all the organic compounds analyzed, acetone and 2-butanone



had the only detections (0.380 mg/L and 0.058 mg/L, respectively; NEL ID #L0012109sampled December 11, 2000).



1 Set a 14-inch surface conductor to 19 feet bgs and cement to surface at a Northing of11,460 and Easting of 10,210 approximately 30 feet east of GH-13B. The exactcoordinates will be field verified. The surface elevation will be measured at this location,recorded, and used as a reference point. Estimated bgs levels given in the discussionbelow will be adjusted to the reference point.

2. Begin drilling a lithology boring using a 5 V^-inch insert bit while logging cuttings to adepth of 10 feet above the first water bearing zone. It is anticipated that the first water-bearing zone is at approximately 185 feet bgs. From 10 feet above until the bottom of thewater-bearing zone, drive split spoon sampler through the inner barrel. After each splitspoon sample, the driller will advance with the 5 Va-inch insert bit. If there is no samplerecovery in the split spoon sample, the geologist will use the cuttings from the drill bit forlithology characterization.

2. Once the bottom of the first anticipated water zone has been identified, VOC, nitrate, andtotal and dissolved metal samples will be obtained on a 72-hour rush basis., Whilewaiting for analytical results, the water zone recharge rate will be determined, the boringwill be over drilled 3' into the confining unit, and geophysical logging, includingResistivity, Gamma and Neutron. Based on an evaluation of the lithology and geophysics,the boring will be back-filled with bentonite in order to have the screened interval 5 feetinto the water bearing zone, and 5 feet above.

3. The hole will then be reamed to a minimum diameter of 8 inches and a 4-inch diameterand a monitoring well will be installed. The screening of the monitoring well will bebased on an evaluation of the lithology and geophysics according to the Work Plan.

4. After the monitoring well is installed, the next boring will be located approximately 30feet west of the monitoring well and a 24-inch surface conductor will be set to 19 feet bgs.The exact coordinates will be field verified. The surface elevation will be measured atthis location, recorded, and used as a reference point. Estimated bgs levels given in thediscussion below will be adjusted to the reference point.

5. Drill down with a 5 Vz-inch insert bit to the base of the first water bearing zone. Thenutilizing the lithology and geophysical data from over drilling the previous boring, splitspoon samples will then be obtained to verify the confining unit. The boring will then bereamed using a 9 7/8-inch tricone bit, and then reamed to 22 inches using a hole openerand mud. An 18-inch steel conductor casing will then be placed and pressure groutedwith neat cement into the confining zone that is anticipated to be at about 198 feet bgs.

6. Once the first water bearing zone has been sealed off, the boring will be advanced usingthe 5 ^a-inch insert bit, to approximately 10 feet above the second water-bearing zone.The second water-bearing zone is anticipated to be at about 260 feet bgs.



7. Once the bottom of the second water-bearing zone has been identified using procedures initem number 2 above, rush samples will be obtained as prescribed in item number 3above. While waiting for the sample results, recharge rates will be obtained. Waterchemistry and static water level measurements will be analyzed to determine if the secondwater-bearing zone is connected to the first water bearing zone.

8. If it is determined that the two water-bearing zones are independent, item number 12 willbe performed, then the hole will be reamed to a minimum diameter of 8 inches and a 4-inch diameter monitoring well will be installed, and drilling will stop at this location.

9. If it is determined that the second water bearing zone is connected to the first, the boringwill be advanced using split spoon sampling until a confining unit is identified. This unitshould be at approximately 270 feet bgs. Then the boring will be reamed with a 9 7/8-inch tricone and then opened with a 16-inch hole opener and mud to set a 12-inch steelconductor casing pressure grouted with neat cement.

10. The seal will be drilled through with a 5 H-inch insert bit, to approximately 10 feet abovethe next water zone. This water zone is anticipated to be about 280 feet bgs. Split spoonsamples will be obtained until the bottom of this water-bearing zone is identified.

11. Steps 7 through 10 will then be repeated until a second independent water-bearing zone isidentified.*

12. After the second water-bearing zone has been located and confirmed via water chemistryand static water level measurements, the hole will be geophysically logged byresistivity, gamma and neutron methods. The hole will be reamed to a minimum diameterof 8 inches and a 4-inch diameter monitoring well will be installed, and drilling will stopat this location.

* Additional telescope sizes and drill methods will be approved, as necessary, by the DrillForeman, Driller, Field Geologist and Field Project Manager.

Sunrise Mountain Landfill 7Geohydrologic Drilling Program 16199667.61 task 4




The first boring (GH-7A) at this location was started on April 18, 2000 by Eagle Drilling.GH-7A has the following coordinates and elevation: Northing 15,558.12; Easting 12,333.05;and 2,014.39 Elev. Between April 18 and 20, 2000, borehole GH-7A was advanced from 0 to170 feet below ground surface (bgs) (2,014.39 to 1,844.4 Elev) using a hollow-stem auger.Advancement of borehole GH-7A was stopped on April 20, 2000. On May 24 and 25, 2000,the 170 feet that had been drilled in April 2000 was reamed. There appears to be noindication in the records that a conductor casing was placed in the reamed borehole. On May25, 2000, after the reaming was completed, the borehole was advanced from 170 to 185 feetbgs (1,844.4 to 1,829.4 Elev) using a percussion hammer drill rig. There appears to be noindication in the records that water was encountered in borehole GH-7A. Mr. Jonesperformed the logging on April 18, 19, and 20, 2000 and Mr. Rapoza performed the loggingon May 24 and 25, 2000.

On July 11, 2000, a second boring (GH-7B), approximately 20 feet northwest of the first one,was started by Boart Longyear Drilling. GH-7B has the following coordinates and elevation:Northing 15,574.70; Easting 12,320.90; and 2,012.30 Elev. Between July 11 and 18, 2000,the borehole was advanced using a sonic rig from 0 to 248 feet bgs (2,012.30 to 1,764.3 Elev).At 248 feet bgs (1,764.3 Elev), it was reported that the soil became very stiff and moist. Awater sample was taken on July 18, 2000. Drilling continued until noon on July 19, 2000with advancement to 253 feet bgs (1,759.3 Elev) at which time drilling stopped. It was notedin the field log that the outside of the core barrel was muddy between 248 and 250 feet bgs(1,764.3 to 1,762.3 Elev). At 14:40 on July 19, 2000, a water level reading of 250.75 feet bgs(1,761.55 Elev) was recorded. On July 20, 2000, a water level reading of 242.25 feet bgs(1,770.05 Elev) was recorded at 6:30 a.m., and a water sample was taken. A water levelreading was taken on July 21, 2000, and recorded as 249.00 feet bgs (1,763.30 Elev).

Drilling was resumed on GH-7B on July 25, 2000. Between July 25 and August 1, 2000, GH-7B was advanced from 253 to 421 feet bgs (1,759.3 to 1,591.30 Elev). On August 1, 2000, awater sample was obtained.

Drilling was resumed on August 14, 2000. Between August 14 and August 24, 2000, GH-7Bwas advanced from 421 to 590 feet bgs (1,591.3 to 1,422.3 Elev). A water sample was takenon August 25, 2000.

Drilling resumed on September 28, 2000 at 590 feet bgs (1,422.3 Elev). However, due to achange in drilling companies, the logging of borehole GH-7B started at 597 feet bgs (1,415.3Elev). West Coast Hazmat was the driller and an air rotary rig was used. Between September28 and October 3, 2000, GH-7B was advanced from 590 to 645 feet bgs (1,422.3 to 1,367.3Elev). The total depth of this boring was 645 feet bgs (1,367.3 Elev). It was reported that theboring ended in a fractured Limestone formation when the drill became sand-locked. Sixdifferent geologists performed the logging of this borehole. One additional water sample wastaken on October 17, 2000. This sample was split with USEPA representatives.



Between September 13 and October 2, 2000, several other water level readings were taken. Asummary of all water level measurements recorded at GH-7B is provided below. It can beseen by these results that a somewhat consistent water level was observed over the period forwhich readings were taken.

Time

14:40

6:30

UNKNOWN

9:40

11:16

10:32

6:20

6:45

Date

7/19/2000

7/20/2000

7/21/2000

9/13/2000

9/20/2000

9/26/2000

9/28/2000

10/2/2000

Boring Depth, (ft)bgs

253

253

253

590

590

590

590

640

Water Level, (ft)bgs

250.75

242.25

249.00

248.00

247.90

247.45

252.38

247.87


1761.55

1770.05

1763.30

1764.30

1764.40

1764.85

1759.92

1764.43

Note: Water was first reported in GH-7B at 248 feet bgs (1,76473 Elev).



1. Set a 14-inch surface conductor to 19 feet bgs and cement it in place to the surface at aNorthing of 15,575 and Easting of l2,3t)*5, approximately 30 feet west of GH-7B. Theexact coordinates will be field verified. Approval of this Drill Plan indicates approval ofthis boring outside the boundary of Sunrise Mountain Landfill lease property. The surfaceelevation will be measured at this location, recorded, and used as a reference point.Estimated bgs levels given in the discussion below will be adjusted to the reference point.

3. Begin drilling a lithology characterization boring using a 5 Vi-inch insert bit while loggingcuttings to a depth of 10 feetf above*tne* first water "bearing; zone. It is anticipated that thefirst water bearing zone is at about 223 feet bgs. From 10 feet above thlTanticipated zoneuntil water is encountered, samples will be collected with a split spoon sampler driventhrough the inner barrel. Once water is encountered, continue 5 feet into the water zonewith the split spoon sampling and stop. The driller will follow with the drill bit after eachsplit spoon sample. If there is no sample recovery, the geologist will use the cuttings forlithology characterization; this applies to all times when split spoon drive sampling isbeing performed.

4. Water samples will be obtained and arialyzed'for VOCs, nitrate, metals arid dissolvedmetals. After sampling and static water levels are obtained, the boring will be over drilled3' into the confining unit, and geophysical logging, including Resistivity, Gamma andNeutron. Based on an evaluation of the lithology and geophysics, the boring will be back-


SOS ENGINEERS10-T990tf7:OTTask4


filled with bentonite in order to have the appropriate screened interval as described in thework plan.

5. The boring will be reamed to a minimum diameter of 8 inches with a tricone bit. A 4-inchdiameter well will be set.

6. Move 30 foot to the west, set a 26-inch surface conductor to 19 feet bgs and cement it inplace to the surface. The exact coordinates will be field verified. Approval of this DrillPlan indicates approval of this boring outside the boundary of Sunrise Mountain Landfilllease property. The surface elevation will be measured at this location, recorded, and usedas a reference point. Estimated bgs levels given in the discussion below will be adjustedto the reference point.

7. Drill using a 5 Vi-inch insert bit to the bottom of where the well for the first water zonewas set. This interval will not be lithologically logged unless the geologist observes achange in the lithology from the previous boring by observation of drill cuttings. Splitspoon sampling will then begin in order to identify a confining unit for the first waterzone, or until a dry zone is reached, estimated to be about 335 feet bgs.

8. Once the confining unit or dry zone is identified, ream the lithology boring to 9 7/8-inchusing a tricone bit.

9. Using a 24-inch hole opener, ream to the confining or dry zone, and set a 20-inch steelconductor casing (mud will be used at this point to lift cuttings).

10. Seal using neat cement under pressure and allow 24 hours for curing.

11. Drill through the 20-inch steel conductor casing and continue the boring using the 5 ¥2-inch insert bit until approximately 10 feet above the next water-bearing zone. This zone isanticipated to be about 362 feet bgs. Then begin split spoon sampling to determine the topand bottom of the second water-bearing zone.

12. Wait 72 hours for water to reach static level. A yield rate test will be performed andanalytical samples obtained and analyzed for VOCs, nitrate, metals, and dissolved metalson a rush turn-around basis. Once the analytical results are received, an evaluation of thewater chemistry and water level measurements will be compared to the first boring.

13. If the static level, yield rate, and water chemistry varies from the first well, indicating aseparate zone, advancement at this location will be stopped. At this time the hole will belogged by resistivity, gamma and neutron downhole geophysics. The boring will then bereamed to a minimum diameter of 8 inches and a 4-inch diameter monitoring well will beset.

14. If it is determined that the first water-bearing zone and the second water-bearing zone areconnected using static level and water chemistry data, this boring will be advanced to aconfining unit. Split spoon samples will be obtained until a confining unit is identified. Itis anticipated that this confining zone is at approximately 419 feet bgs.

15. For this seal, ream the lithology boring to a 9 7/8-inch pilot boring with a tricone bit, thenuse a 19-inch hole opener and mud. Set a 16-inch steel conductor and pressure grout withneat cement.

SCS ENGINEERSSunrise Mountain Landfill 10Geohydrologic Drilling Program 10199007.01 Task 4


16. This process shall be repeated until a second independent water zone is identified and amonitoring well installed.*

17. After the second water-bearing zone has been located and confirmed via water chemistryand static water level, the hole will be geophysically logged with resistivity, gamma andneutron methods. The boring will then be reamed to a minimum diameter of 8 inches andset a 4-inch diameter monitoring well.

* Additional telescope sizes and drill methods will be approved, as necessary, by the DrillForeman, Driller, Field Geologist and the Fiel3 Project Manager.

Sunrise Mountain Landfill 11Geohydrologic Drilling Program 10199007.01 Task 4




Only one borehole has been advanced at location 15 (GH-15A). Layne-Christensen Drillingstarted this borehole on October 13, 2000. GH-15A has the following coordinates andelevation: Northing 14,471.90; Easting 13,119.60; and 2031.42 Elev. Between October 13and 18, 2000, the borehole was advanced from 0 to 281 feet below ground surface (bgs)(2,031.42 to 1,750.4 Elev) using a percussion hammer rig for the first 31 feet and a reversecirculation rig from 31 feet to 281 feet. A water sample was taken on October 18, 2000. OnOctober 19, 2000, the boring was advanced two feet from 281 to 283 feet bgs (1,750.4 to1,748.4 Elev). A water level of 275.53 feet bgs (1,755.89 Elev) was recorded on October 19,2000.

It is reported in the boring log for GH-15A that on October 20, 2000, the borehole was blownout prior to further advancement to relieve the borehole of water. On October 20, 2000,drilling continued in GH-15A and proceeded from 283 to 317 feet bgs (1,748.4 to 1,714.4Elev). A water sample was taken on October 20, 2000 and a water level reading of 278.65bgs (1,752.77 Elev) was recorded.

Drilling resumed on October 23 through October 24, 2000, with the borehole being advancedfrom 317 to 387 feet bgs (1,714.4 to 1,644.4 Elev). A water sample was taken at the end ofthe day on October 24, 2000. On October 25, 2000, drilling continued and the borehole wasadvanced from 387 to 437 feet bgs (1,644.4 to 1,594.4 Elev). A water sample was collectedat the end of the day on October 25, 2000. On October 26, 2000, the boring was advancedfrom 437 to 517 feet bgs (1,594.4 to 1,514.4 Elev). A water sample was collected at the endof the day on October 26, 2000. On October 27, 2000, borehole GH-15A was advanced from517 to 597 feet bgs (1,514.4 to 1,434.4 Elev).

Drilling resumed on November 17, 2000, when Western Hazmat used an air rotary rig to drillfrom 601 to 612 feet bgs (1,430.4 to 1,419.4 Elev). The final day of drilling for borehole GH-15A was on November 27, 2000, when the borehole was advanced from 615 to 626.2 feet bgs(1,416.4 to 1,405.2 Elev). It was reported that during the drilling on November 27, 2000, theborehole was blown out twice with 50 to 60 gallons of water recorded on the boring log asaccumulating during approximately two hours and forty minutes between blow outs. Theboring log indicates that the hold was producing too much water to use the rotary air drillingmethod. Two additional water levels were recorded on November 28, 2000.

Time

**

**

12:50**

Date

10/19/2000

10/20/2000

11/28/2000

11/28/2000

Boring Depth, (ft)bgs

283

317

626

626

Water Level, (ft)bgs

275.53

278.65

340.31

295.69


1755.89

1752.77

1691.11

1735.73

Note: Water was first reported in GH-15A at 281 feet bgs (1,750.4 Elev).


12 SCS ENGINEERS10199007.01 Task 4

Aug ust 2001 © 2001, SCS Engineers



1. Set a 14-inch surface conductor to 19 feefbgs and cement to surface at a Northing of14,483 and Easting of 13,104, approximately 30 feet northwest of GH-15A. The exactcoordinates will be field verified. The surface elevation will be measured at this location,recorded, and used as a reference point. Estimated bgs levels given in the discussionbelow will be adjusted to the reference point.

2. Begin drilling a lithology boring using a 5 ̂ -inch insert bit while logging cuttings to adepth of 10 feet above the first water-bearing zone. It is anticipated that the first water-bearing zone is at about 251 feet bgs. From 10 feet above this zone until water isencountered, samples will be collected with a split spoon sampler driven through the innerbarrel. Once water is encountered, continue 5 feet into the water zone with the split spoonsampling and stop. The driller will follow with the drill t)it after each split spoon sample.If there is no sample recovery, the geologist will use the cuttings forlithofogy.

3. Obtain a static water level measurement and collect groundwater samples to be analyzedfor VOCs, nitrate, metals, and dissolved metals. Trie Boring will tie over drilled 3' into theconfining unit, and geophysical logging, including Resistivity, Gamma lind'Neutron.Based on an evaluation of the lithology and geophysics, the boring will be back-filled withbentonite in order to have the screened interval 5 feet into the water bearing zone, and 5feet above.

£r The boring will be reamed to a minimum diameter of 8 inches with a tricone bit. A 4-inchdiameter well will be set that is screened 5 foot into, and 5 foot above the water zone.Move 30 feet to the north, set a 26-inch surface conductor to 19 feet bgs and cement it inplace to surface. The exact coordinates will be field verified. The surface elevation willbe measured at this location, recorded, andlised as a reference point "Flstiniated^gs levelsgiven in the discussion below will be adjusted to tfie"reference point.

6. Drill using a 5 Vi-inch insert bit to the bottom of where the well for the first water zonewas set. This interval will not be lithologically logged unless the geologist observes achange in the lithology from the previous boring. Split spoon sampling will then begin inorder to identify a confining unit for the first water zone or until a dry zone is reached,estimated to be about 306 feet bgs.

7. Once the confining unit or dry zone is identified, ream the lithology boring to 9 7/8 inchesusing a tricone bit.

8. Using a 24-inch hole opener, ream to the confining or dry zone to set a 20-inch steelconductor casing (mud will be used at this point to lift cuttings).

9. Seal using neat cement under pressure and allow 24 hours for curing.

10. Drill through the 20-inch steel conductor casing and continue the boring using the 5 ¥2-inch insert bit until approximately 10 feet above the next water-bearing zone. This zone isanticipated to be around 324 feet bgs. Then begin split spoon sampling to determine thebeginning and end of the second water-bearing zone.

Sunrise Mountain Landfill 13Geohydrologic Drilling Program 10199007.01 Task 4


11. Wait 72 hours for water to reach static level. A yield rate will be performed and analyticalsamples obtained and run for VOCs, nitrate, metals, and dissolved metals on a rush turn-around basis. Once the analytical has been returned, an evaluation of the water chemistry,and static water level measurements will be compared to determine if this water-bearingzone is connected to the upper one.

12. If the static level, yield rate, and water chemistry varies from the first well indicating aseparate zone, advancement at this location will be stopped. At this time the hole will belogged with resistivity, gamma and neutron down hole geophysics. Ream the boring to aminimum of 8-inches and set a 4-inch monitoring well.

13. If it is determined that the first water bearing zone and the second water bearing zone areconnected, the boring will be advanced using split spoon sampling until a confining unit isfound. This is anticipated to be near 335 feet bgs.

14. Once the confining unit is identified, this zone will be sealed off with a 16-inch steelconductor casing.

15. The boring will be reamed with a 9 7/8-inch tricone bit and the hole opened with a 19-inchhole opener and mud. The 16-inch steel conductor casing will be set and pressure groutedwith neat cement.

16. The boring will then be advanced with a 5 V^-inch insert bit, until approximately 10 feetabove the next water-bearing zone. This water-bearing zone is anticipated to be 480 feetbgs.

17. This process shall be repeated until a second independent water zone is identified and amonitoring well installed.*

18. After the second water-bearing zone has been located and confirmed via water chemistryand static water level, the hole will be geophysically logged with resistivity, gamma andneutron methods. Then, ream the boring to a minimum diameter of 8-inches and set a 4-inch monitoring well.

* Additional telescope sizes and drill methods will be approved, as necessary, by the DrillForeman, Driller, Field Geologist and Field Project Manager.

Sunrise Mountain Landfill 14Geohydrologic Drilling Program

August 2001 ©2001, SCS Engineers

ATTACHMENT A

BORING TRACKING LOG

Sunrise Mountain LandfillGeohydrologic drilling Program


, Tom" <t3ardnerT@TepsiIverstate5otTT> or? 08/23/2001 03:09: fl PM

To: [email protected], Steve Wall/R9/US6PA/US@EPAcc: "Alan Gaddy (E-mail)" <[email protected]>, "David Mezzacappa (E-mail)"

<[email protected]>, "Steve Smith (E-mail)" <[email protected]>, "SCS Sunrise(E-mail)" <[email protected]>

Subject: Revised Drill Plan

«DrillPlan7_13_15. doc»Based on Steve Wall's and Sandra's comments, please find attached therevised drill plan for 7, 13, and 15.

DnllPlan7_13 15 doc

drilling plan sunrise mountain landfill geohydrologic ...drilling plan sunrise mountain landfill...

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