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United Slates Environmental Protection Agency Remedial Planning Activities at Selected Uncontrolled Hazardous Waste Sites in Region III Contract No. 68-W&-0090
Transcript of Remedial Planning Activities at Selected Uncontrolled Hazardous … · 2019. 11. 20. · 2. Section...
United SlatesEnvironmentalProtection Agency
Remedial Planning Activities atSelected UncontrolledHazardous Waste Sites inRegion IIIContract No. 68-W&-0090
ADDENDUM TOSAMPLING AND ANALYSIS PLAN FOR
RAYMARKSTTEREMEDIAL INVESTIGATION AND
FEASIBILITY STUDYCONTRACT NO. 90-10-3L78
JUNE 7, 1990
Prepared for:
U.S. ENVIRONMENTAL PROTECTION AGENCYREGION HI
841 Chestnut StreetPhiladelphia, Pennsylvania 19107
This document has been prepared for the U.S. Environmental Protection Agency underContract No. 6S-W8-0090. The material contained herein is confidential and is not tobe disclosed to, discussed with, or made available to any person or persons for anyreason without the prior express approval of a responsible official to the U.S.Environmental Protection Agency.
RAYMARK2/1Q5.51
EngineersPlanners:EconorhisfsScientists,.
June 7, 1990
NJO63109.PP.QS
Mr. Michael TowleRemedial Project Manager ; " "US. Environmental Protection^ AgencyRegion III841 Chestnut Street""Philadelphia, Pennsylvania 19107
Dear Mr. Towle:"
Subject: Submittal of Addendum to the Sampling and Analysis Plan for theRaymark Site RI/FS
Enclosed please find three copies of the addendum to the sampling and analysis plan(SAP) for the Raymark^Site RI/FS "submitted March 1£ 1990. This addendumincorporates your comments on the SAP; and also those of the EPA Central RegionalLaboratory (CRL). " " ' " '. ' ^
Please feel free to.contact me should you have any questions or comments regardingthis addendum. "" " ' " " ~
Sincerely,
CH2MHILL
oseph G. Cleary, P.ESite Manager
RAYMARK2/106.51
cc: Jerry Curtain^Cindy Metzger
CH2MRILL' North Atlantic R e i o n e - r c d : e . 201.3169300Porsip-pQ'riy. New Jersey 07054-1102
ADDENDUM TO SAMPLING AND ANALYSIS PLANFOR RAYMARK SITE
GENERAL REVISIONS
The following are general revisions applicable to the entire SAP document:
1. The approval sheet for the Raymark Sampling and Analysis Plan (SAP) isattached.
2. The names and addresses of the police and fire department and an emergencyroute map are attached.
QUALITY ASSURANCE PROJECT PLAN
The following revisions apply to the Quality Assurance Project Plan (QAPjP):
1. The Table of Contents of the QAPjP is revised as attached.
2. Section 2, the subsurface soil and ground water sampling are revised as follows(page 7 of 8):
• Subsurface soils - up to 20 samples for the Target Compound List(TCL) of VOCs, 10 samples for VOCs by the Methanol PreservativeVOC Method (Methanol Method), four samples for other TCL non-VOC organics (includes base neutral/acid extractables (BNAEs), pesti-cides and polychorinated biphenyls (PCBs)), four samples for the TargetAnalyte List (TAL) of metals and total cyanide, four samples for geo-technical parameters and total organic carbon (TOC), and one samplefor leachabflity of metals by the ASTM Standard Test Method forShake Extraction of Solid Waste and Water (ASTM Shake Test). Upto 10 additional soil borings may be installed for TCL VOCs and VOCsby the Methanol Method sampling, if the results of the surface soil sam-pling, soil gas results, or the headspace analysis of subsurface soilsamples indicate additional information is needed.
* Ground water - 29 samples for TCL VOCs (low detection limitmethod), one sample for TCL non-VOC organics (BNAEs, pesticides,and PCBs), TAL metals (total and dissolved), total cyanide, and totalsuspended solids (TSS). Field measurements (pH, redox potential (Eh),specific conductance, and temperature) will also be taken for allsamples.
RAYMARK2/067.51
Section:Revision: 0Date: 1-23-90Page: 1 of 1
APPROVAL SHEETRAYMARK SITE
SOURCE CONTROL RI/FS
1* Approved:
2. Approved:
3. Approved:
4. Approved:
EPA Region Ill's RPM
EPA Region Ill's CRL
CH2M HILL'5 SM
Date
Date
Date
CH2M HILL'S Designated QC Manager Date
NJR45/002WP
Electric Utility
Telephone Utility
Owner
EMERGENCY PHONE NUMBERS
phone _____________address______________contact
Police Department 675-4400___________________________.________'
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___ _ _ _ „ „ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _attn:________
Fire Department 672-1221
____________________„__________________ __attn:Paramedic
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _attn:Fire Report ____________
________„________________________________attn:Ambulance Service 441-6600 .
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _attn:.Water Department ______
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _attn:
Gas Utility
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _______ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _attn:Local Sanitarian
attn:
Hospital Warminster General 225 Newtown Rd 441-6600
attn:
attn:
attn:
attn:
This notice i s located a t : . . _ . - I RAYMARK2/099.51
LOCATION MA? OF RAYMARK. SITE.To W
CONTENTS
Acronyms and Abbreviations
1 Introduction 1-1
2 Project Description 2-1Project Background and Site History 2-1Project Objectives . 2-4QAPjP Objectives 2-6Scope of RI Field Activities : 2-6
3 Project Organization and Responsibilities 3-1
4 Quality Assurance Objectives : " " 4-1Precision and Accuracy "" 4-3Representativeness ; 4-4Completeness : 4-5Comparability 4-5
5 Sampling Procedures 5-1
6 Sample Custody 6-1
7 Equipment Calibration 7-1Field Equipment Calibration 7-1Laboratory Equipment Calibration 7-2
8 Analytical Procedures 8-1 - -RAS 8-3SAS 8-4Sample Preparation 8-4 -Instrument Performance Criteria • : - • g-4Detection Limits 8-5Initial and Continuous CalibrationCriteria 8-5Laboratory QC Criteria ' " 8-5Data Transmittal 8-5
9 Data Reduction, Validation, andReporting 9-1
Data Reduction 9-1Data Validation 9-2Data Reporting [ _ 9-3.- - E- — ...
RAYMARK2£)65.5i
10 Internal Quality Control Checks 10-1Field Sampling Quality ControlProcedures - 10-1Laboratory Analytical QualityControl Procedures 10-4
11 Performance and Systems Audit 11-1Laboratory Performance and Systems 11-1AuditField Team Performance and Systems 11-1Audit
12 Preventative Maintenance " " 12-1
13 Data Assessment Procedures " 13-1
14 Corrective Actions " "'" " 14-1
15 Quality Assurance Reports 15-1
References
Appendix A. Standard Operating ProcedureAppendix B, SAS RequestsAppendix C, Site Safety Plan ...... . _ . —:.- ..-- :
RAYMARK2/065.51
TABLES
2-1 Summary of Analytical Program for Raymark RIField Activities
4-1 Precision, Accuracy, and CompletenessQuantitative Goals
4-2 Collection Frequency of Field QC Samples7-1 Calibration Standards and Sources8-1 Target Compound List8-2 Target Analyte List14-1 Corrective Action Request Form
RAYMARK2/065.51
ARW953
FIGURES
2-1 General Location Map of Raymark Site2-2 Base Map" of Raymark Site2-3 Field Activities Schedule3-1 -Project Organization Chart Raymark Remedial
Investigation9-1 Flow of Forms and Sample and Analysis
Information9-2 Example of a Data Tracking Flow Chart11-1 Field Performance Audit Checklist
RAYMARK2/065.51
3. Table 2-1, Summary of Analytical Program for the Raymark Field Activities, isrevised as attached.
4. Figure 2-3, Field Activities Schedule, is revised as attached.
5. Figure 3-1, Project Organization Chart, is revised as attached, to include thename of the QC officer.
6. The number of QC samples for subsurface soil samples to be analyzed forVOCs by the Methanol Method have been changed as discussed with ColleenWalling of the EPA Region HI Central Regional Laboratory on May 24, 1990.The following changes have been made:
• Equipment rinse blanks wfll no longer be taken each day, instead twoequipment rinse blanks will be taken each week soil samples arecollected.
• Trip blanks for VOC analysis by the Methanol Method will no longerbe taken each day, instead samples will be shipped every other day andonly one trip blank will accompany each shipment.
7, Table 4-2, Collection Frequencies of Field QC Samples, is revised as attached.
8. Sludge and waste pit samples for VOC analysis will be handled in the field andanalyzed as high concentration samples. The analytical request type will bechanged from RAS to SAS and a SAS request form will be prepared for thisanalysis.
9. Tables 8-1 and 8-2, are revised as attached, to include only compounds on theTarget Compound List and analytes on the Target Analyte List.
10. It has not yet been determined by the CRL what bottle size or type will beused for the soil samples to be analyzed by the Methanol Method.
FIELD SAMPLING PLAN
The following revisions apply to the Field Sampling Plan (FSP):
1. The Table of Contents of the FSP is revised as attached.
2. Section 2, the subsurface soil boring locations are revised as follows (page 1 of15):
A total of 10 borings will be advanced to collect subsurface soil samples withsplitspoons and shelby tube samplers at the proposed locations shown inFigure 2-1. Table 2-1 summarizes the subsurface soil boring program.
RAYMARK2/067.51
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Table 8-1TARGET COMPOUND LIST"
TARGET COMPOUNDS
Volatile Organic Compounds (34)
Acetone ~" " " r
Benzene
Bromodichtoromethane
Bromofonn
Bromomethane
2-Butanone - - - - - - -—-—-—-
Carbon disulfide
Carbon tetrachloride
Chlorobenzene
Chloroetliane
Chloroform
Chloromethane " -
Dibromochloromethane
1,1-Dichloroetnane
1,2-DichIoroetnane
1, 1 -Dichloroethene
1,2-Dichloroetnene (total)
1 ,2-DichIoropropane
cis-1 ,3-Dich Joropropene
irans-1 ,3-Dichloropropene
Etiiylbenzene
2-Hexanone
4-Methyl-2-pentanone
Methyiene chloride
Styrene - .- - - - -- - - «..-— — — -
1,1,2,2-TetrachIoroethane - - -
Tetrachtoroethene
1 ,1 ,1-Trichloroethane
1 ,1,2-Trichloroethane
Trichloroetnene
Add Exfractable Organic Compunds (14)
Benzoic Acid
4-Chloro-3 methyl phenol
2-ChlorophenoI
2-4,-DicftIorophenol
2,4-Dimethylpfaenol
4,6-Dinitro-2-niethyl phenol
2,4-Dinitrophenol
2-MethyI phenol
4-Methyl phenol
2-Nitrophenol
4-Niirophenot
Pentachlorophenol
Phenol
2,4,5-TrichJorophenol
Base-Neutral Extractable Organic Compounds (SI)
Acenaphtnene
Acenaphthylene
Anthracene
Benzo(a)anthracene
Ben2O(a)pyrene
BenzoCb)nuoranthene
Benzo(k)Eluroanthene
Benzo(g,h,t)peryJene
Benzyl alcohol
bis(2-ChloroethyI) ether
bis(2-Chloroethoxy) methane
bis(2-Ch!oroisopropyl) ether
bis(2-EthyItiexyl)phthalate
4-Bromophenyl phenyl ether
Butyl benzyl phthalate
RAYMARK2A)69.5l7i
Volatile Organic Compounds (34) (contfniud)
Toluene
Vinyl testate
Vinyl chloride
Xylcne (lotil)
Pesticides and PCBs (26)
Alpha-BHC
Beu-BHC
Ddu-BHC
G*mm*-BHC (lindane)
Heptachlor
Endosulfan I
Dteidrin
4,4' -DDE
Endohulfsa sulfaie
4,4-DDT
Methoxychtor
Endrin keione
tlpht-Chlordane
prama-Oilordane
Tcoaphene
Arochlor-1016
ArcWor-1221
Arodilor-1232
Arochlor-1242
Aichlor-I24S
ArochIor-1254
Arochlor-1260
Base-Neutral Extractable Organic Compounds (51)(continued)
4-Chloroaniline
2-Chloronaphihalenc
4-Chlorophenyl phenyl ether
Chrysene
Dibenzo(a,h)anthracene
Dibenzofuran
Dinbuiylphthalatc
1 ,2-Dichlorobenzene
1 .3-Dich!orobenzcne
1.4-DichIorobenzenc
3,3'-DichIorobenzidJne
Dicthyl phlhalate
Dimethy] phthalale
2,4-Diniirotoluetie
2,6-Dinitrotoluene
Di-n-octyl phthalate
Fluoranthene
Fluo«ne
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclopentadiene
Hexachlorocthane
Indeno(l ,Z3-cd)pyrene
Isophorone
2-Methylnaphthalene
Naphthalene
2-Nitroaniline
3-Nitroaniline
4-NitroaniIine
Nitrobenzene
N-NitroKxii-n-propylamineN-Nitrosodiphcny!amine
Phenanthrene
Pyretic
1 ,2-4-Trichlorobenzene
2,4,6-Trichlorophenol
RAYMARK2/069.51/2
Table 8-2TARGET ANALYTE LIST
TARGET ANALYTES
Metals (23)
Aluminum
AntimonyArsenic
Barium
BerylliumCadmiumCalciumChromiumCobalt
CopperIron
LeadMagnesium
ManganeseMercuryNickel
Potassium
SeleniumSilver
SodiumThallilumVanadium
ZincMiscellaneous (1)
Cyanide
RAYMARK2/070.51/1
CONTENTS
Page
1 Introduction 1-1
2 Sampling Program 2-1Sampling Locations and Frequency 2-1Sampling Designation ' 2-9Type of Analysis 2-12
3 Sampling Operations 3-1Project Staff Training 3-1Sample Collection Procedures : 3-1Decontamination Procedures : " 3-12Field Quality Control Procedures 3-15
4 Sample Preservation, Packaging, and . 4-1Shipping Procedures
5 Chain-of-Custody Procedures - 5-1Field Custody Procedures ' - 5-1Laboratory Custody Procedures : 5-4
6 Documentation 6-1Sample Identification Tags . 6-2Sample Label 6-4SAS Packing List 6-4Traffic Reports • 6-5Custody Seals : 6-5Field Notebooks : - 6-6Photographs 6-8Shipping Logs 6-9
7 Disposal of RI Generated Wastes . 7-1
References
RAYMARK2/06651 . . . . . . .
AR3G090
TABLES
2-1. -Raymark RI Proposed Sampling and Analytical Program2-2 QA/QC Sample Requirements
RAYMARK2/066.5I
FIGURES
2-1 Proposed Boring Locations2-2 Proposed Monitoring Well Locations2-3 Septic Well Waste Pit Location5-1 Chain-of-Custody Record5-2 Custody Seal6-1 Sample Identification tag6-2 Organic Traffic Report Form6-3 Inorganic Traffic Report Form6-4 SAS Request Form
RAYMARK2/066.51
Borings will be installed as described in the FSP except for the following:
* No background boring will be installed (this was boring B-9 in the DraftFSP).
• Boring B-ll will no longer be installed as per the May 24, 1990Raymark site visit with Mike Towle.
* Boring B-10 will be moved south of the main site building, just east ofthe MW-3 well cluster based on-site visit with Mike Towle.
• Boring B-9 as defined in the Raymark SAP shall be moved to the frontof the property, adjacent to the MW-2 well cluster.
3. Section 2, the subsurface soil sampling is revised as follows (pages 3, 4, 5, and6 of 15): "" '" ~~—— """"" "
Two soil samples per boring will be sent for TCL VOC analysis. Thebasis for the selection will be as follows:
• The sample with the highest headspace VOC concentration
• The deepest sample with headspace response
If no sample in the boring exhibits elevated headspace readings, onlyone sample per boring will be submitted for TCL VOC analysis usingstandard CLP procedures. This sample should be selected based on vis-ual indications of contamination. If visual evidence of contamination isabsent, the interval just above the tope of bedrock should be selected.
Sampling for analysis by the Methanol Method remains as described inthe FSP.
The samples with the highest VOC headspace response in each of thefollowing borings wfll undergo analysis for TCL non-VOC organics(BNAEs, pesticides, and PCBs):
* One boring in the area of four lagoons (B-2)
• One boring in fifth lagoon (B-5)
* Boring near waste pit (B-6)
• Boring (B-4), selected based on the surface soil sampling results
Metals and cyanide analyses will be performed on the following borings:
RAYMARK2/067.51 . ..... "" .... 3 _
• One boring in the area of four lagoons (B-2)
• One boring in the fifth lagoon (B-5)
• Boring near waste pit (B-6)
• Boring (B-4), selected based on the surface soil sampling results
Samples from the zero to 1 foot interval are not required followingcompletion of the surface soil sampling program.
One sample will be collected for metals and cyanide analysis from theseborings. Samples will be collected from the first fine grained materialencountered in borings outside the Four Lagoon area. Samples fromthe lagoon borings will be taken from sludge (if present) or from thefirst native materials encountered.
If no fine grained material in non-lagoon borings is observed or nosludge or native material can be seen in the lagoon borings, the samplewfll be taken from the zone with the highest HNu response. If no sam-ples in the borings exhibit elevated headspace readings, a sample shouldbe selected based on visual indications of contamination. If no HNuresponse or visual contamination is noted, the sample will be takenfrom the interval just above bedrock.
The ASTM "Shake Test" will be performed on one sample from a bor-ing in the four lagoon area. The sample will be collected from lagoonsludge or soil beneath the area of the four lagoons.
If insufficient sample volume occurs, sample collection shall be priori-tized as follows:
1. TCLVOCs2. TCL VOCs by the Methanol Method3. TAL and cyanide4. TCL non-VOC organics5. Geotechnical parameters6. ASTM Shake Test
If sample volume is insufficient, the remaining samples will be collected fromthe next splitspoon volume, if current borehole depth is non-critical (e.g., lowVOC response). If the current borehole depth is critical (e.g., elevated VOCresponse), the remaining samples will be collected from an adjacent boring.
Table 2-1, Raymark RI Proposed Sampling and Analytical Program, is revisedas attached. Refer to this table for analysis planned.
RAYMARK2/067.51
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5. Figure 2-1, Proposed Boring Location are revised as attached. This figureshows the revised boring locations based on the soil gas and surface soil sam-pling results.
6, Section 2 (page 6 of 15), the well installation program is revised to include oneadditional well (MW-4) at a location to be determined. This well will beapproximately 100 feet deep and drilled as open hole to allow geophysical log-ging and packer testing. The well will be completed with PVC screen andriser.
7. Based on the May 24, 1990 Raymark site visit with Mike Towle, the followingrevisions to Section 2 will also be made:
• Well Cluster MW-2 will be moved northward 50 feet" away from thefront building entrance.
• Well cluster MW-2 will have low standpipes (2 feet).
Well cluster MW-3 will be placed on the asphalt just of the islandmedian between the site entrances.
• The selection of either standpipe or flushmount roadbox at MW-3 lusterwill be confirmed at a later date.
The location of MW-4 as stated in the Raymark SAP will remaintentative.
8. Downhole geophysical logging will be performed on the deep wells in the threeclusters (MW-1, MW-2, and MW-3) and the additional well (MW-4). Loggingwill be performed by the United States Geologic Services (USGS).
9. Section 2 (page 7 of 15), packer testing will be performed only on well MW-4.A maximum of three zones will be tested. Each zone will be pumped until thezone stabilizes and a pumping rate is determined or a maximum of 8 hours.Water pressure or water level will be monitored below, within, and above thepumped zone to verify that proper packer seals have been established. Theair pressure within the packer will also be monitored to verify the packer seal.
10. Section 2 (page 7 of 15), ground water samples will be collected from each .zone during packer testing of well MW-4 as follows:
• Sample at 10 minutes« Sample every 2 hours until test is completed* Sample after zone recovery
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A maximum of six samples will be collected from each zone or a total of 18samples during the packer testing of well MW-4. Samples will be sent for lowlevel TCL VOC analysis by a CLP laboratory or the CRL.
11. Section 2 (page 7 of 15), Campbell data loggers will be installed at least 4 daysbefore packer testing MW-4.
12. Figure 2-2 is revised to include the additional well (MW-4) requested by EPA.
13. Section 2 (page 9 of 15), the monitoring well nomenclature is revised toinclude one additional well. This well will be designated as MW-4.
14. Section 2 (page 13 of 15), the subsurface soil samples are reduced to 20samples (two per boring) for TCL VOC analysis.
15, Section 2 (page 14 of 15), the ground water sampling is revised to include 29ground water samples for TCL VOC, using a lower detection limit method.
16. Table 2-2, QA/QC Samples Requirements is revised as attached. This tablelists the QA/QC sample requirements,
17. Section 3 (page 1 of 17), the subsurface soil boring program is revised toinclude only 10 borings.
18. Section 3 (page 3 of 17), the number of sample per boring for TCL VOCanalysis is revised to two. The sample for TCL VOCs using standard CLP pro-cedures, will include the sample with the highest headspace VOC reading andthe deepest sample with VOC reading. The sample with the highest head-space VOC reading will also be sent for VOC analysis by the MethanolMethod.
19. Section 3 (page 3 of 17), the samples for TCL nbn-VOC analysis (BNAEs,pesticides, and PCBs) will be collected from the following borings:
• One boring in the area of four lagoons (B-2)
• One boring in the fifth lagoon (B-5)
• Boring near waste pit (B-6)
• Boring (B-4), selected based on the surface soil sampling results
20. Section 3 (page 4 of 17), the samples for TAL metals and cyanide analysis willbe collected from the following borings: . ;
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• One boring in the area of four lagoons (B-2)
• One boring in the fifth lagoon (B-5)
* Boring near waste pit (B-6)
• Boring (B-4), selected based on the surface soil sampling results
One sample will be collected for metals and cyanide analysis from these bor-ings. Samples will be collected from the first fine grained material encoun-tered. Samples from the lagoon borings will be taken from sludge (if present)or from the first native materials encountered.
21. Section 3 (page 5 of 17), the sample for the ASTM "Shake Test" will be collec-ted from a boring in the four lagoon area. The sample will be collected fromlagoon sludge or soil beneath the area of the four lagoons.
If insufficient sample volume occurs, sample collection shall be prioritized asfollows:
1. TCLVOCs : - . .2. TCL VOCs by the Methanol Method3. TAL and cyanide4. TCL non-VOC organics5. Geotechnical parameters6. ASTM Shake Test
22. Section 3 (page 5 of 17), the ground water program is revised to include oneadditional well MW-4. This well will be approximately 100 feet deep. Down-hole geophysical logging will be performed on the deep wells in each well clus-ter and welt MW-4. The downhole geophysical logging will be performed byUSGS. Based on the results, EPA will determine the screen intervals for thetwo shallower wells in each of the clusters. Packer testing will be performedonly on well MW-4.
23. Section 3 (page 7 of 17), the fracture zones will be identified by the followingprocedure. The subcontractor will core the deep hole of the first well clusterto approximately 200 feet and ream the cored hole. The USGS will then con-duct the geophysical logging. Based on the results of this logging, EPA willdetermine the need for shallow wells in each cluster and the screen interval forthe shallower wells.
24. Section 3 (page 7 of 17), the well logging is revised to include Campbell dataloggers on well MW-4. The data loggers will be installed at least 4 days beforeinitiation of the packer test on this well. Downhole geophysical logging will be
RAYMARK2/067.51
performed on the deep wells in clusters MW-1, MW-2, and MW-3, and on wellMW-4.
25. Section 3 (page 8 of 17), the packer testing is revised to be performed only onwell MW-4. A maximum of three zones will be tested. Each zone will bepumped until the zone stabilizes and a pumping rate is determined or amaximum of 8 hours. The packer test will be performed after well MW-4 ispumped until the turbidity and sediment are substantially reduced.
26, Section 3, ground water from well development and packer/pump test will bedischarged to the sewer/storm water system only after approval is receivedfrom EPA/PADER.
27. Section 3 (page 8 of 17), the ground water sampling is revised to include 18samples during packer testing of well MW-4. Samples will be collected fromeach of the three packer zones as follows:
• Sample at 10 minutes• Sample every 2 hours until test is completed• Sample after zone recovery
A maximum of 6 samples will be collected from each zone. Samples will be sent forlow level TCL VOC analysis by a CLP laboratory or the CRL.
RAYMARK2/067.51 :"" - " 8AR300982
IpIIIIIIILIIIIIIII1 AR300983
