IpoundS5 ENVIRONMENTAL SCIENCE SERVICES INC ENVIRONMENTAL SCIENTISTS ENGINEERS AND PLANNERS

March 7 2003 VIA EMAIL AND FACSIMILE

Mr Neil Handler Remedial Proj ect Manager Office of Site Remediation and Restoration US Environmental Protection Agency 1 Congress Street Suite 1100 (HBO) Boston Massachusetts 02114-2023

Re Response to USEP A Comments Davis Liquid Waste Superfund Site ESS Project No A365-002

Dear Neil

Attached are responses to the US Environmental Protection Agency (USEP A) comments dated March 3 2003 The comments were specific to the following documents

bull Draft Phase 2 Work Plan dated January 292003 and

bull Draft Phase 2 Project Operations Plan dated January 292003

The attachments to this comment-response letter will be submitted via facsimile A hardcopy of the entire comment-response document will also be sent via FEDEX

Ifyou have any questions please contact me at 781-489-1106

Sincerely

ENVIRONMENTAL SCIENCE SERVICES INC

9JJLJ Jeffrey G Hershberge PG Peter E ~E Proj ect Manager Proj ect Director

c Gary Jablonski RIDEM Mark Metcalf Ashland Inc

888 Worcester Street Suite 240 401 Wampanoag Trail Suite 400 90 Route 6A Unit 4B Wellesley Massachusetts 02482 East Providence Rhode Island 02915 Sandwich Massachusetts 02563

Telephone (781) 431-0500 Facsimile (781) 431-7434 Telephone (400 434-5560 Facsimile (400 434-8158 Telephone (508) 833-6226 Facsimile (508) 833-9687

wwwessgroupcom

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 1

Specific Comments - Draft Project Operations PlanField Sampling Plan

Section

1 5 51 Quality AssuranceQuality Control Sampling The text ofthe last sentence ofthis section states that field QC for MNA parameters will only consist of temperature blanks while Table 1A appears to be less definite on this point (ie states that temperature blanks will only be used if provided by the lab) - please clarify and explain the basis for the QAlQC you are proposing for the MNA parameters Also Table 1B would appear to indicate that temperature blanks are optional for VOC analysis (ie text in table implies that temperature blanks will only be used if supplied by the lab) Please note that temperature blanks are required for all VOC analysis

Response The MNA data generated for Phase 2 will be used more qualitatively thus data quality objectives that are consistent with screening level data are appropriate Therefore only limited field QC and Tier I data validation are proposed for the Phase 2 MNA sampling program Field QCproposedfor the Phase 2 sampling program for MNA parameters will include temperature blanks for all parameters and trip blanks for the dissolved gas samples (methane ethane ethene) The text ofSection 51 and Table 1A will be updated to reflect this level offield QC

Temperature blanks will be included with all VOC samples Table 1B will be updated to reflect this requirement

2 9 5214 Investigation-Derived Waste Sampling Please note that the sampling information in Table 2 was not provided and needs to be submitted

Response Three types ofInvestigation-derived waste (ID JiJ7) will be generated during the proposed well installation and development program The three types ofIDW include

bull Impacted soil with heads pace reading greater than 25 ppm

bull Drill water including packer testing purge water and development water and

bull Decontamination fluids

IDWwill be managed in accordance with the Site Management Plan (SMP) and RlDEM Policy Memo 95-01 In general ID W will be managed in drums or bulk containers Drums containing ID W will be clearly marked as to the contents and location ofgeneration

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 2

Impacted soil generated during the program (identified based on field headspace screening greater than 25 ppm) will be managed in drums and sampled for the appropriate disposal criteria depending on the identified method for off-site management The off-site management will be coordinated with the Agencies

ID W water including drill water packer test water and development water will be managed in drums at the point ofgeneration Depending on the volumes ofwater generated this ID W water may be transferred to a large storage tank (ie Baker tank) IDWwater generated during the program will be discharged onto the ground surface at the Site ifthe results of analytical testing for VOCs meet the applicable RlDEM GA standards Analytical testing may include the results ofpacker sampling Phase 2 groundwater sampling or sampling of drums at each well or well couplet location In accordance with the February 26 2003 ESS letter to Gary Jablonski it is proposed that the IDW water generated at select locations (OW-I06 (0) OW-l 07(0) OW-l 09(0) and OW-ll1(0R) be discharged to the ground surface at the point of generation based on the Phase 1 sampling results at nearby monitoring wells A table summarizing the Phase 1 results for the nearby monitoring results is attached

Decontamination water will be collected on the decontamination pad and transferred to drums as necessary These drums will be sampled for VOCs to determine the appropriate methodfor off-site management ifnecessary Decontamination water will be discharged onto the ground surface at the Site if the results ofanalytical testing for VOCs meet the applicable RlDEM GA standards

3 1 SOP A-I Soil Boring Drilling and Sampling Please clarify whether core samples will be obtained by extruding them into a plastic sleeve andor tray or whether a plastic liner will be used inside of the core barrel

Response During SONIC drilling soil cores will be collected within the Sonic core barrel and extruded from the core barrel into polyethylene sleeves for sample handling During drive and wash drilling soil cores will be collected within a stainless steel split spoon Plastic liners will not be utilized during soil or bedrock sampling

4 7 SOP A-3 Bedrock Drilling and Testing In the last sentence of Section 332 of this SOP it states that drilling fluid shall be water obtained from the local public water supply Please revise the section to reflect ESSs current plan for where and how water to be used for drilling fluid shall be obtained In addition please provide EPA and RIDEM with a copy ofthe sampling results ofthis water as soon as it is available (and obviously before drilling work begins)

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 3

Response This section ofsOP A-3 will be modified to clarify that the source ofwaterfor the drilling program will be two ponds located on the Davis property The drilling subcontractor will pump the water directly from the ponds The analytical results for the samples collected from these ponds on February 13 2002 are attached

5 11 SOP A-3 Bedrock Drilling and Testing The discussion in Section 351 concerning the set up for the packer testing mentions the possibility ofusing a double packer setup at the site to allow for the testing ofboth the upper and lower zones ofthe aquifer (as it relates to the test zone) Please clarify whether a double or a single packer assembly will be used as the site Could you also provide additional information on the packer setup you will be using including a schematic

Response A single packer setup will be used for the packer testing The setup consists ofa single injlatable rubber packer with a submersible pump and transducer (or transducer inlet) located beneath the packer within the test zone Manual measurements will be performed to monitor water levels above the packer during the test A schematic ofthe single packer setup is attached

6 13 SOP A-3 Bedrock Drilling and Testing Please provide figures which show details ofthe proposed well construction as described in Section 36 of this SOP Schematics should include road-box construction and unconsolidated and consolidated monitoring well construction

Response

The general monitoring well schematic is attached Well construction within the unconsolidated deposits and bedrock will utilize similar materials and methods PVC well caps or expandable plugs will be installed on all wellheads

For bedrock wells the bentonite seal (using either bentonite pellets or slurry) will be installed within the bedrock to isolate the bedrock from the overlying unconsolidated deposits Any additional bedrock borehole beneath the proposed screen location (ie bedrock well completed within upper 15 feet of bedrock) will be sealed using either bentonitecement grout or bentonite pellets with a minimum 1-foot-thick sand pack between the bottom ofthe well screen and the lower seal

Well construction using ajlushmount roadbox will also be very similar to the standpipe well completion with the PVC riser cut offjust below ground surface and the jlushmount roadbox cemented over the riser at the ground surface The cement seal will be sloped to the extent

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 4

possible to direct surface runoffawayfrom the wellhead

7 15 SOP A-3 Bedrock Drilling and Testing Please provide additional details of how identification numbers will be clearly marked and secured to the new wells As you are aware it has been a challenge in the past to determine the identification of some of the older wells at the Site Accordingly adequate procedures need to be used for this phase of the work to avoid these problems ifpossible in the future

Response Plastic or metal tags containing the well identification will be afflXed to each newly-installed well at the completion ofthe Phase 2 well installation program

8 17 SOP A-3 Bedrock Drilling and Testing Please note that a copy of all boring logs and well construction forms will need to be submitted with the Phase 2 Report

Response A copy ofall boring logs and well construction forms will be included in the Phase 2 Report

Specific Comments - Draft Phase 2 Work Plan

9 1 10 Introduction Please also add to your discussion as to the basis of refining the Phase 2 SOW that there were a number of subsequent site visits as well

Response The subsequent site visits will be referenced in the revised Section 1 o

10 2 12 Health and Safety Plan (HASP) The last sentence ofthis section (ie A revised POP will be submitted under separate cover by June 102002) appears to be a carryover from an earlier submittal please check

Response This sentence will be removed from the revised text

11 3 211 Monitoring Well Integrity Assessment Please make sure that a brief explanation is included either in the text of this section or in Table 1 for all of the wells evaluated Specifically I did not see any explanation for why OW -22 and OW -79 were not included in the Phase 2 work Please also note that it appears that the location ofboth of these wells was inadvertently not included on Figure 2

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 5

Response Additional explanation regarding the conditions identified at existing monitoring wells 0 Wshy22 and OW-79 during the monitoring well integrity assessment completed in May 2002 will be included in Section 211 OW-22 and OW-79 will also be included on the revised Figure 2 OW-22 was not included in the Phase 2 work due to the proposed installation ofOW-109 (OR) OW-79 was not included in the Phase 2 work due to the proposed installation ofOWshy106 (OR) Based on our current discussions with the property owner we may not receive permission to install OW-106 (OR) and OW-79 may be included within the Phase 2 sampling program to provide analytical data within the bedrock in this area

12 5 211 Monitoring Well Integrity Assessment It is EPAs understanding that the location and placement ofOW-112 (OR) has been agreed upon with the property owner therefore the text in the second bullet on page 5 and around the middle of page 6 can be revised to reflect that this is no longer one of the optional wells Please also make the appropriate changes to Figure 2 to reflect the wells new location

Response The text in Section 211 will be modified to reflect the proposed installation of OW-112 (OR) in the immediate vicinity ofexisting monitoring wells MW-27 and MW-28 and that this well is no longer optional Figure 2 will also be updated to show the proposed location for the installation ofthese two wells

13 7 2211 Advancement ofBorings Could you please explain why OW-94(R) will not be rotary cored similar to rest of the bedrock wells to be installed in open areas Please also explain the basis for ESS proposing to not packer test this well Given the variability ofthe stratigraphy at this site EPA does not believe that we can assume that the new location will duplicate earlier conditions and thereby eliminate the need for packer testing

Response It has been agreed that rotary coring and packer testing and sampling will be performed to assist in the selection ofa well screen location for replacement well OW-94 (R)

14 8 2212 Installation ofMonitoring Wells Please clarify whether the analysis for the screening ofVOCs to be performed during packer testing will be performed on-site or off-site and the method to be used for this analysis

Response The VOC screening to be performed during packer testing will be performed off-site by ESS Laboratory a Division of Thielsch Engineering located in Cranston Rhode Island The screening level analyses will be performed in accordance with EPA Method 8260B Field

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 6

sampling QC will include the use oftemperature blanks equipment blanks and trip blanks Internal Laboratory QC to be provided with the rush-turnaround samples will be in accordance with the ESS Laboratory Quality Assurance Plans and will include surrogate recoveries laboratory method blank and a laboratory control sample for all samples

15 9 224 Groundwater Monitoring Well OW-laIR appears to be a very significant well from the standpoint of providing us with useful information on conditions within the bedrock aquifer in the heart ofthe plume I recall that there may have been several deeper bedrock wells nearby the proposed location of this well were they ever evaluated for use and ifso what were the problems associated with our using them Ifwe are unable to install well OW-laIR it maybe better to obtain some information from one ofthe nearby bedrock wells rather than none Would it be possible to packer test the upper reaches of one of the nearby bedrock wells

Response We agree that proposed well 0 W-J OJ (R) is a very important location and we will continue to pursue the landowners permission for the installation ofthis well Additional review of available well data in this area did not identify any existing bedrock monitoring wells in this area An inventory ofthe existing wells in this area will be performed to ascertain ifany of the existing wells are completed within bedrock

16 9 224 Groundwater Monitoring EPA believes that the addition of OW-06 (an overburden well) to the wells selected for monitoring in the NW quadrant may be useful especially ifcontamination is detected at the proposed location ofOW-l 12(0) EPA also would suggest that OW-lOO(O) be added to the abbreviated list oflocations at which PCBs should be tested for given the numerous drums which were removed from this area during source control activities

Response As discussed in the Work Plan OW-06 will potentially be included in the Phase 2 program as a water level monitoring location only Depending on the analytical results ofthe Phase 2 groundwater sampling program at the other deSignated sampling locations and the results ofthe groundwater flow evaluation the need to include existing monitoring well OW-06 in the Phase 3 sampling program will be evaluated Ifoptional well OW-J 00 (0) is installed during the Phase 2 program it will be sampled for PCBs in addition to VOCs SVOCs metals and cyanide during the Phase 2 groundwater sampling

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 2

Impacted soil generated during the program (identified based on field headspace screening greater than 25 ppm) will be managed in drums and sampled for the appropriate disposal criteria depending on the identified method for off-site management The off-site management will be coordinated with the Agencies

ID W water including drill water packer test water and development water will be managed in drums at the point ofgeneration Depending on the volumes ofwater generated this ID W water may be transferred to a large storage tank (ie Baker tank) IDWwater generated during the program will be discharged onto the ground surface at the Site ifthe results of analytical testing for VOCs meet the applicable RlDEM GA standards Analytical testing may include the results ofpacker sampling Phase 2 groundwater sampling or sampling of drums at each well or well couplet location In accordance with the February 26 2003 ESS letter to Gary Jablonski it is proposed that the IDW water generated at select locations (OW-I06 (0) OW-l 07(0) OW-l 09(0) and OW-ll1(0R) be discharged to the ground surface at the point of generation based on the Phase 1 sampling results at nearby monitoring wells A table summarizing the Phase 1 results for the nearby monitoring results is attached

Decontamination water will be collected on the decontamination pad and transferred to drums as necessary These drums will be sampled for VOCs to determine the appropriate methodfor off-site management ifnecessary Decontamination water will be discharged onto the ground surface at the Site if the results ofanalytical testing for VOCs meet the applicable RlDEM GA standards

3 1 SOP A-I Soil Boring Drilling and Sampling Please clarify whether core samples will be obtained by extruding them into a plastic sleeve andor tray or whether a plastic liner will be used inside of the core barrel

Response During SONIC drilling soil cores will be collected within the Sonic core barrel and extruded from the core barrel into polyethylene sleeves for sample handling During drive and wash drilling soil cores will be collected within a stainless steel split spoon Plastic liners will not be utilized during soil or bedrock sampling

4 7 SOP A-3 Bedrock Drilling and Testing In the last sentence of Section 332 of this SOP it states that drilling fluid shall be water obtained from the local public water supply Please revise the section to reflect ESSs current plan for where and how water to be used for drilling fluid shall be obtained In addition please provide EPA and RIDEM with a copy ofthe sampling results ofthis water as soon as it is available (and obviously before drilling work begins)

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 3

Response This section ofsOP A-3 will be modified to clarify that the source ofwaterfor the drilling program will be two ponds located on the Davis property The drilling subcontractor will pump the water directly from the ponds The analytical results for the samples collected from these ponds on February 13 2002 are attached

5 11 SOP A-3 Bedrock Drilling and Testing The discussion in Section 351 concerning the set up for the packer testing mentions the possibility ofusing a double packer setup at the site to allow for the testing ofboth the upper and lower zones ofthe aquifer (as it relates to the test zone) Please clarify whether a double or a single packer assembly will be used as the site Could you also provide additional information on the packer setup you will be using including a schematic

Response A single packer setup will be used for the packer testing The setup consists ofa single injlatable rubber packer with a submersible pump and transducer (or transducer inlet) located beneath the packer within the test zone Manual measurements will be performed to monitor water levels above the packer during the test A schematic ofthe single packer setup is attached

6 13 SOP A-3 Bedrock Drilling and Testing Please provide figures which show details ofthe proposed well construction as described in Section 36 of this SOP Schematics should include road-box construction and unconsolidated and consolidated monitoring well construction

Response

The general monitoring well schematic is attached Well construction within the unconsolidated deposits and bedrock will utilize similar materials and methods PVC well caps or expandable plugs will be installed on all wellheads

For bedrock wells the bentonite seal (using either bentonite pellets or slurry) will be installed within the bedrock to isolate the bedrock from the overlying unconsolidated deposits Any additional bedrock borehole beneath the proposed screen location (ie bedrock well completed within upper 15 feet of bedrock) will be sealed using either bentonitecement grout or bentonite pellets with a minimum 1-foot-thick sand pack between the bottom ofthe well screen and the lower seal

Well construction using ajlushmount roadbox will also be very similar to the standpipe well completion with the PVC riser cut offjust below ground surface and the jlushmount roadbox cemented over the riser at the ground surface The cement seal will be sloped to the extent

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 4

possible to direct surface runoffawayfrom the wellhead

7 15 SOP A-3 Bedrock Drilling and Testing Please provide additional details of how identification numbers will be clearly marked and secured to the new wells As you are aware it has been a challenge in the past to determine the identification of some of the older wells at the Site Accordingly adequate procedures need to be used for this phase of the work to avoid these problems ifpossible in the future

Response Plastic or metal tags containing the well identification will be afflXed to each newly-installed well at the completion ofthe Phase 2 well installation program

8 17 SOP A-3 Bedrock Drilling and Testing Please note that a copy of all boring logs and well construction forms will need to be submitted with the Phase 2 Report

Response A copy ofall boring logs and well construction forms will be included in the Phase 2 Report

Specific Comments - Draft Phase 2 Work Plan

9 1 10 Introduction Please also add to your discussion as to the basis of refining the Phase 2 SOW that there were a number of subsequent site visits as well

Response The subsequent site visits will be referenced in the revised Section 1 o

10 2 12 Health and Safety Plan (HASP) The last sentence ofthis section (ie A revised POP will be submitted under separate cover by June 102002) appears to be a carryover from an earlier submittal please check

Response This sentence will be removed from the revised text

11 3 211 Monitoring Well Integrity Assessment Please make sure that a brief explanation is included either in the text of this section or in Table 1 for all of the wells evaluated Specifically I did not see any explanation for why OW -22 and OW -79 were not included in the Phase 2 work Please also note that it appears that the location ofboth of these wells was inadvertently not included on Figure 2

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 5

Response Additional explanation regarding the conditions identified at existing monitoring wells 0 Wshy22 and OW-79 during the monitoring well integrity assessment completed in May 2002 will be included in Section 211 OW-22 and OW-79 will also be included on the revised Figure 2 OW-22 was not included in the Phase 2 work due to the proposed installation ofOW-109 (OR) OW-79 was not included in the Phase 2 work due to the proposed installation ofOWshy106 (OR) Based on our current discussions with the property owner we may not receive permission to install OW-106 (OR) and OW-79 may be included within the Phase 2 sampling program to provide analytical data within the bedrock in this area

12 5 211 Monitoring Well Integrity Assessment It is EPAs understanding that the location and placement ofOW-112 (OR) has been agreed upon with the property owner therefore the text in the second bullet on page 5 and around the middle of page 6 can be revised to reflect that this is no longer one of the optional wells Please also make the appropriate changes to Figure 2 to reflect the wells new location

Response The text in Section 211 will be modified to reflect the proposed installation of OW-112 (OR) in the immediate vicinity ofexisting monitoring wells MW-27 and MW-28 and that this well is no longer optional Figure 2 will also be updated to show the proposed location for the installation ofthese two wells

13 7 2211 Advancement ofBorings Could you please explain why OW-94(R) will not be rotary cored similar to rest of the bedrock wells to be installed in open areas Please also explain the basis for ESS proposing to not packer test this well Given the variability ofthe stratigraphy at this site EPA does not believe that we can assume that the new location will duplicate earlier conditions and thereby eliminate the need for packer testing

Response It has been agreed that rotary coring and packer testing and sampling will be performed to assist in the selection ofa well screen location for replacement well OW-94 (R)

14 8 2212 Installation ofMonitoring Wells Please clarify whether the analysis for the screening ofVOCs to be performed during packer testing will be performed on-site or off-site and the method to be used for this analysis

Response The VOC screening to be performed during packer testing will be performed off-site by ESS Laboratory a Division of Thielsch Engineering located in Cranston Rhode Island The screening level analyses will be performed in accordance with EPA Method 8260B Field

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 6

sampling QC will include the use oftemperature blanks equipment blanks and trip blanks Internal Laboratory QC to be provided with the rush-turnaround samples will be in accordance with the ESS Laboratory Quality Assurance Plans and will include surrogate recoveries laboratory method blank and a laboratory control sample for all samples

15 9 224 Groundwater Monitoring Well OW-laIR appears to be a very significant well from the standpoint of providing us with useful information on conditions within the bedrock aquifer in the heart ofthe plume I recall that there may have been several deeper bedrock wells nearby the proposed location of this well were they ever evaluated for use and ifso what were the problems associated with our using them Ifwe are unable to install well OW-laIR it maybe better to obtain some information from one ofthe nearby bedrock wells rather than none Would it be possible to packer test the upper reaches of one of the nearby bedrock wells

Response We agree that proposed well 0 W-J OJ (R) is a very important location and we will continue to pursue the landowners permission for the installation ofthis well Additional review of available well data in this area did not identify any existing bedrock monitoring wells in this area An inventory ofthe existing wells in this area will be performed to ascertain ifany of the existing wells are completed within bedrock

16 9 224 Groundwater Monitoring EPA believes that the addition of OW-06 (an overburden well) to the wells selected for monitoring in the NW quadrant may be useful especially ifcontamination is detected at the proposed location ofOW-l 12(0) EPA also would suggest that OW-lOO(O) be added to the abbreviated list oflocations at which PCBs should be tested for given the numerous drums which were removed from this area during source control activities

Response As discussed in the Work Plan OW-06 will potentially be included in the Phase 2 program as a water level monitoring location only Depending on the analytical results ofthe Phase 2 groundwater sampling program at the other deSignated sampling locations and the results ofthe groundwater flow evaluation the need to include existing monitoring well OW-06 in the Phase 3 sampling program will be evaluated Ifoptional well OW-J 00 (0) is installed during the Phase 2 program it will be sampled for PCBs in addition to VOCs SVOCs metals and cyanide during the Phase 2 groundwater sampling

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 3

Response This section ofsOP A-3 will be modified to clarify that the source ofwaterfor the drilling program will be two ponds located on the Davis property The drilling subcontractor will pump the water directly from the ponds The analytical results for the samples collected from these ponds on February 13 2002 are attached

5 11 SOP A-3 Bedrock Drilling and Testing The discussion in Section 351 concerning the set up for the packer testing mentions the possibility ofusing a double packer setup at the site to allow for the testing ofboth the upper and lower zones ofthe aquifer (as it relates to the test zone) Please clarify whether a double or a single packer assembly will be used as the site Could you also provide additional information on the packer setup you will be using including a schematic

Response A single packer setup will be used for the packer testing The setup consists ofa single injlatable rubber packer with a submersible pump and transducer (or transducer inlet) located beneath the packer within the test zone Manual measurements will be performed to monitor water levels above the packer during the test A schematic ofthe single packer setup is attached

6 13 SOP A-3 Bedrock Drilling and Testing Please provide figures which show details ofthe proposed well construction as described in Section 36 of this SOP Schematics should include road-box construction and unconsolidated and consolidated monitoring well construction

Response

The general monitoring well schematic is attached Well construction within the unconsolidated deposits and bedrock will utilize similar materials and methods PVC well caps or expandable plugs will be installed on all wellheads

For bedrock wells the bentonite seal (using either bentonite pellets or slurry) will be installed within the bedrock to isolate the bedrock from the overlying unconsolidated deposits Any additional bedrock borehole beneath the proposed screen location (ie bedrock well completed within upper 15 feet of bedrock) will be sealed using either bentonitecement grout or bentonite pellets with a minimum 1-foot-thick sand pack between the bottom ofthe well screen and the lower seal

Well construction using ajlushmount roadbox will also be very similar to the standpipe well completion with the PVC riser cut offjust below ground surface and the jlushmount roadbox cemented over the riser at the ground surface The cement seal will be sloped to the extent

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 4

possible to direct surface runoffawayfrom the wellhead

7 15 SOP A-3 Bedrock Drilling and Testing Please provide additional details of how identification numbers will be clearly marked and secured to the new wells As you are aware it has been a challenge in the past to determine the identification of some of the older wells at the Site Accordingly adequate procedures need to be used for this phase of the work to avoid these problems ifpossible in the future

Response Plastic or metal tags containing the well identification will be afflXed to each newly-installed well at the completion ofthe Phase 2 well installation program

8 17 SOP A-3 Bedrock Drilling and Testing Please note that a copy of all boring logs and well construction forms will need to be submitted with the Phase 2 Report

Response A copy ofall boring logs and well construction forms will be included in the Phase 2 Report

Specific Comments - Draft Phase 2 Work Plan

9 1 10 Introduction Please also add to your discussion as to the basis of refining the Phase 2 SOW that there were a number of subsequent site visits as well

Response The subsequent site visits will be referenced in the revised Section 1 o

10 2 12 Health and Safety Plan (HASP) The last sentence ofthis section (ie A revised POP will be submitted under separate cover by June 102002) appears to be a carryover from an earlier submittal please check

Response This sentence will be removed from the revised text

11 3 211 Monitoring Well Integrity Assessment Please make sure that a brief explanation is included either in the text of this section or in Table 1 for all of the wells evaluated Specifically I did not see any explanation for why OW -22 and OW -79 were not included in the Phase 2 work Please also note that it appears that the location ofboth of these wells was inadvertently not included on Figure 2

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 5

Response Additional explanation regarding the conditions identified at existing monitoring wells 0 Wshy22 and OW-79 during the monitoring well integrity assessment completed in May 2002 will be included in Section 211 OW-22 and OW-79 will also be included on the revised Figure 2 OW-22 was not included in the Phase 2 work due to the proposed installation ofOW-109 (OR) OW-79 was not included in the Phase 2 work due to the proposed installation ofOWshy106 (OR) Based on our current discussions with the property owner we may not receive permission to install OW-106 (OR) and OW-79 may be included within the Phase 2 sampling program to provide analytical data within the bedrock in this area

12 5 211 Monitoring Well Integrity Assessment It is EPAs understanding that the location and placement ofOW-112 (OR) has been agreed upon with the property owner therefore the text in the second bullet on page 5 and around the middle of page 6 can be revised to reflect that this is no longer one of the optional wells Please also make the appropriate changes to Figure 2 to reflect the wells new location

Response The text in Section 211 will be modified to reflect the proposed installation of OW-112 (OR) in the immediate vicinity ofexisting monitoring wells MW-27 and MW-28 and that this well is no longer optional Figure 2 will also be updated to show the proposed location for the installation ofthese two wells

13 7 2211 Advancement ofBorings Could you please explain why OW-94(R) will not be rotary cored similar to rest of the bedrock wells to be installed in open areas Please also explain the basis for ESS proposing to not packer test this well Given the variability ofthe stratigraphy at this site EPA does not believe that we can assume that the new location will duplicate earlier conditions and thereby eliminate the need for packer testing

Response It has been agreed that rotary coring and packer testing and sampling will be performed to assist in the selection ofa well screen location for replacement well OW-94 (R)

14 8 2212 Installation ofMonitoring Wells Please clarify whether the analysis for the screening ofVOCs to be performed during packer testing will be performed on-site or off-site and the method to be used for this analysis

Response The VOC screening to be performed during packer testing will be performed off-site by ESS Laboratory a Division of Thielsch Engineering located in Cranston Rhode Island The screening level analyses will be performed in accordance with EPA Method 8260B Field

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 6

sampling QC will include the use oftemperature blanks equipment blanks and trip blanks Internal Laboratory QC to be provided with the rush-turnaround samples will be in accordance with the ESS Laboratory Quality Assurance Plans and will include surrogate recoveries laboratory method blank and a laboratory control sample for all samples

15 9 224 Groundwater Monitoring Well OW-laIR appears to be a very significant well from the standpoint of providing us with useful information on conditions within the bedrock aquifer in the heart ofthe plume I recall that there may have been several deeper bedrock wells nearby the proposed location of this well were they ever evaluated for use and ifso what were the problems associated with our using them Ifwe are unable to install well OW-laIR it maybe better to obtain some information from one ofthe nearby bedrock wells rather than none Would it be possible to packer test the upper reaches of one of the nearby bedrock wells

Response We agree that proposed well 0 W-J OJ (R) is a very important location and we will continue to pursue the landowners permission for the installation ofthis well Additional review of available well data in this area did not identify any existing bedrock monitoring wells in this area An inventory ofthe existing wells in this area will be performed to ascertain ifany of the existing wells are completed within bedrock

16 9 224 Groundwater Monitoring EPA believes that the addition of OW-06 (an overburden well) to the wells selected for monitoring in the NW quadrant may be useful especially ifcontamination is detected at the proposed location ofOW-l 12(0) EPA also would suggest that OW-lOO(O) be added to the abbreviated list oflocations at which PCBs should be tested for given the numerous drums which were removed from this area during source control activities

Response As discussed in the Work Plan OW-06 will potentially be included in the Phase 2 program as a water level monitoring location only Depending on the analytical results ofthe Phase 2 groundwater sampling program at the other deSignated sampling locations and the results ofthe groundwater flow evaluation the need to include existing monitoring well OW-06 in the Phase 3 sampling program will be evaluated Ifoptional well OW-J 00 (0) is installed during the Phase 2 program it will be sampled for PCBs in addition to VOCs SVOCs metals and cyanide during the Phase 2 groundwater sampling

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 4

possible to direct surface runoffawayfrom the wellhead

7 15 SOP A-3 Bedrock Drilling and Testing Please provide additional details of how identification numbers will be clearly marked and secured to the new wells As you are aware it has been a challenge in the past to determine the identification of some of the older wells at the Site Accordingly adequate procedures need to be used for this phase of the work to avoid these problems ifpossible in the future

Response Plastic or metal tags containing the well identification will be afflXed to each newly-installed well at the completion ofthe Phase 2 well installation program

8 17 SOP A-3 Bedrock Drilling and Testing Please note that a copy of all boring logs and well construction forms will need to be submitted with the Phase 2 Report

Response A copy ofall boring logs and well construction forms will be included in the Phase 2 Report

Specific Comments - Draft Phase 2 Work Plan

9 1 10 Introduction Please also add to your discussion as to the basis of refining the Phase 2 SOW that there were a number of subsequent site visits as well

Response The subsequent site visits will be referenced in the revised Section 1 o

10 2 12 Health and Safety Plan (HASP) The last sentence ofthis section (ie A revised POP will be submitted under separate cover by June 102002) appears to be a carryover from an earlier submittal please check

Response This sentence will be removed from the revised text

11 3 211 Monitoring Well Integrity Assessment Please make sure that a brief explanation is included either in the text of this section or in Table 1 for all of the wells evaluated Specifically I did not see any explanation for why OW -22 and OW -79 were not included in the Phase 2 work Please also note that it appears that the location ofboth of these wells was inadvertently not included on Figure 2

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 5

Response Additional explanation regarding the conditions identified at existing monitoring wells 0 Wshy22 and OW-79 during the monitoring well integrity assessment completed in May 2002 will be included in Section 211 OW-22 and OW-79 will also be included on the revised Figure 2 OW-22 was not included in the Phase 2 work due to the proposed installation ofOW-109 (OR) OW-79 was not included in the Phase 2 work due to the proposed installation ofOWshy106 (OR) Based on our current discussions with the property owner we may not receive permission to install OW-106 (OR) and OW-79 may be included within the Phase 2 sampling program to provide analytical data within the bedrock in this area

12 5 211 Monitoring Well Integrity Assessment It is EPAs understanding that the location and placement ofOW-112 (OR) has been agreed upon with the property owner therefore the text in the second bullet on page 5 and around the middle of page 6 can be revised to reflect that this is no longer one of the optional wells Please also make the appropriate changes to Figure 2 to reflect the wells new location

Response The text in Section 211 will be modified to reflect the proposed installation of OW-112 (OR) in the immediate vicinity ofexisting monitoring wells MW-27 and MW-28 and that this well is no longer optional Figure 2 will also be updated to show the proposed location for the installation ofthese two wells

13 7 2211 Advancement ofBorings Could you please explain why OW-94(R) will not be rotary cored similar to rest of the bedrock wells to be installed in open areas Please also explain the basis for ESS proposing to not packer test this well Given the variability ofthe stratigraphy at this site EPA does not believe that we can assume that the new location will duplicate earlier conditions and thereby eliminate the need for packer testing

Response It has been agreed that rotary coring and packer testing and sampling will be performed to assist in the selection ofa well screen location for replacement well OW-94 (R)

14 8 2212 Installation ofMonitoring Wells Please clarify whether the analysis for the screening ofVOCs to be performed during packer testing will be performed on-site or off-site and the method to be used for this analysis

Response The VOC screening to be performed during packer testing will be performed off-site by ESS Laboratory a Division of Thielsch Engineering located in Cranston Rhode Island The screening level analyses will be performed in accordance with EPA Method 8260B Field

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 6

sampling QC will include the use oftemperature blanks equipment blanks and trip blanks Internal Laboratory QC to be provided with the rush-turnaround samples will be in accordance with the ESS Laboratory Quality Assurance Plans and will include surrogate recoveries laboratory method blank and a laboratory control sample for all samples

15 9 224 Groundwater Monitoring Well OW-laIR appears to be a very significant well from the standpoint of providing us with useful information on conditions within the bedrock aquifer in the heart ofthe plume I recall that there may have been several deeper bedrock wells nearby the proposed location of this well were they ever evaluated for use and ifso what were the problems associated with our using them Ifwe are unable to install well OW-laIR it maybe better to obtain some information from one ofthe nearby bedrock wells rather than none Would it be possible to packer test the upper reaches of one of the nearby bedrock wells

Response We agree that proposed well 0 W-J OJ (R) is a very important location and we will continue to pursue the landowners permission for the installation ofthis well Additional review of available well data in this area did not identify any existing bedrock monitoring wells in this area An inventory ofthe existing wells in this area will be performed to ascertain ifany of the existing wells are completed within bedrock

16 9 224 Groundwater Monitoring EPA believes that the addition of OW-06 (an overburden well) to the wells selected for monitoring in the NW quadrant may be useful especially ifcontamination is detected at the proposed location ofOW-l 12(0) EPA also would suggest that OW-lOO(O) be added to the abbreviated list oflocations at which PCBs should be tested for given the numerous drums which were removed from this area during source control activities

Response As discussed in the Work Plan OW-06 will potentially be included in the Phase 2 program as a water level monitoring location only Depending on the analytical results ofthe Phase 2 groundwater sampling program at the other deSignated sampling locations and the results ofthe groundwater flow evaluation the need to include existing monitoring well OW-06 in the Phase 3 sampling program will be evaluated Ifoptional well OW-J 00 (0) is installed during the Phase 2 program it will be sampled for PCBs in addition to VOCs SVOCs metals and cyanide during the Phase 2 groundwater sampling

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 5

Response Additional explanation regarding the conditions identified at existing monitoring wells 0 Wshy22 and OW-79 during the monitoring well integrity assessment completed in May 2002 will be included in Section 211 OW-22 and OW-79 will also be included on the revised Figure 2 OW-22 was not included in the Phase 2 work due to the proposed installation ofOW-109 (OR) OW-79 was not included in the Phase 2 work due to the proposed installation ofOWshy106 (OR) Based on our current discussions with the property owner we may not receive permission to install OW-106 (OR) and OW-79 may be included within the Phase 2 sampling program to provide analytical data within the bedrock in this area

12 5 211 Monitoring Well Integrity Assessment It is EPAs understanding that the location and placement ofOW-112 (OR) has been agreed upon with the property owner therefore the text in the second bullet on page 5 and around the middle of page 6 can be revised to reflect that this is no longer one of the optional wells Please also make the appropriate changes to Figure 2 to reflect the wells new location

Response The text in Section 211 will be modified to reflect the proposed installation of OW-112 (OR) in the immediate vicinity ofexisting monitoring wells MW-27 and MW-28 and that this well is no longer optional Figure 2 will also be updated to show the proposed location for the installation ofthese two wells

13 7 2211 Advancement ofBorings Could you please explain why OW-94(R) will not be rotary cored similar to rest of the bedrock wells to be installed in open areas Please also explain the basis for ESS proposing to not packer test this well Given the variability ofthe stratigraphy at this site EPA does not believe that we can assume that the new location will duplicate earlier conditions and thereby eliminate the need for packer testing

Response It has been agreed that rotary coring and packer testing and sampling will be performed to assist in the selection ofa well screen location for replacement well OW-94 (R)

14 8 2212 Installation ofMonitoring Wells Please clarify whether the analysis for the screening ofVOCs to be performed during packer testing will be performed on-site or off-site and the method to be used for this analysis

Response The VOC screening to be performed during packer testing will be performed off-site by ESS Laboratory a Division of Thielsch Engineering located in Cranston Rhode Island The screening level analyses will be performed in accordance with EPA Method 8260B Field

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 6

sampling QC will include the use oftemperature blanks equipment blanks and trip blanks Internal Laboratory QC to be provided with the rush-turnaround samples will be in accordance with the ESS Laboratory Quality Assurance Plans and will include surrogate recoveries laboratory method blank and a laboratory control sample for all samples

15 9 224 Groundwater Monitoring Well OW-laIR appears to be a very significant well from the standpoint of providing us with useful information on conditions within the bedrock aquifer in the heart ofthe plume I recall that there may have been several deeper bedrock wells nearby the proposed location of this well were they ever evaluated for use and ifso what were the problems associated with our using them Ifwe are unable to install well OW-laIR it maybe better to obtain some information from one ofthe nearby bedrock wells rather than none Would it be possible to packer test the upper reaches of one of the nearby bedrock wells

Response We agree that proposed well 0 W-J OJ (R) is a very important location and we will continue to pursue the landowners permission for the installation ofthis well Additional review of available well data in this area did not identify any existing bedrock monitoring wells in this area An inventory ofthe existing wells in this area will be performed to ascertain ifany of the existing wells are completed within bedrock

16 9 224 Groundwater Monitoring EPA believes that the addition of OW-06 (an overburden well) to the wells selected for monitoring in the NW quadrant may be useful especially ifcontamination is detected at the proposed location ofOW-l 12(0) EPA also would suggest that OW-lOO(O) be added to the abbreviated list oflocations at which PCBs should be tested for given the numerous drums which were removed from this area during source control activities

Response As discussed in the Work Plan OW-06 will potentially be included in the Phase 2 program as a water level monitoring location only Depending on the analytical results ofthe Phase 2 groundwater sampling program at the other deSignated sampling locations and the results ofthe groundwater flow evaluation the need to include existing monitoring well OW-06 in the Phase 3 sampling program will be evaluated Ifoptional well OW-J 00 (0) is installed during the Phase 2 program it will be sampled for PCBs in addition to VOCs SVOCs metals and cyanide during the Phase 2 groundwater sampling

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Project No A365-002 Response to Agency Comments March 7 2003 Page 6

sampling QC will include the use oftemperature blanks equipment blanks and trip blanks Internal Laboratory QC to be provided with the rush-turnaround samples will be in accordance with the ESS Laboratory Quality Assurance Plans and will include surrogate recoveries laboratory method blank and a laboratory control sample for all samples

15 9 224 Groundwater Monitoring Well OW-laIR appears to be a very significant well from the standpoint of providing us with useful information on conditions within the bedrock aquifer in the heart ofthe plume I recall that there may have been several deeper bedrock wells nearby the proposed location of this well were they ever evaluated for use and ifso what were the problems associated with our using them Ifwe are unable to install well OW-laIR it maybe better to obtain some information from one ofthe nearby bedrock wells rather than none Would it be possible to packer test the upper reaches of one of the nearby bedrock wells

Response We agree that proposed well 0 W-J OJ (R) is a very important location and we will continue to pursue the landowners permission for the installation ofthis well Additional review of available well data in this area did not identify any existing bedrock monitoring wells in this area An inventory ofthe existing wells in this area will be performed to ascertain ifany of the existing wells are completed within bedrock

16 9 224 Groundwater Monitoring EPA believes that the addition of OW-06 (an overburden well) to the wells selected for monitoring in the NW quadrant may be useful especially ifcontamination is detected at the proposed location ofOW-l 12(0) EPA also would suggest that OW-lOO(O) be added to the abbreviated list oflocations at which PCBs should be tested for given the numerous drums which were removed from this area during source control activities

Response As discussed in the Work Plan OW-06 will potentially be included in the Phase 2 program as a water level monitoring location only Depending on the analytical results ofthe Phase 2 groundwater sampling program at the other deSignated sampling locations and the results ofthe groundwater flow evaluation the need to include existing monitoring well OW-06 in the Phase 3 sampling program will be evaluated Ifoptional well OW-J 00 (0) is installed during the Phase 2 program it will be sampled for PCBs in addition to VOCs SVOCs metals and cyanide during the Phase 2 groundwater sampling

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Project No A365-002 Response to Agency Conunents March 7 2003 Page 7

17 12 50 Phase 2 Schedule Please provide an updated schedule which identifies the approximate dates of important milestones (eg startcomplete of drilling activities startcomplete of groundwater monitoring activities submittal date ofdraft Phase 2 Report) given where we currently are in the schedule EPA and RIDEM clearly understand that there are many factors which could impact the proposed schedule

Response The following table provides an updated schedule for the performance ofmajor Phase 2 tasks Note that the dates should be viewed as targets Actual completion dates will be dictated by progress in the field and the time required to complete the laboratory analysis and data validation

March 10 2003 May 9 2003 Groundwater Sam lin Ma 272003 June 202003

Jul 2003Draft Phase 2 Re ort October 31 2003

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

Summary of Phase I Sampling Results (IDW Water Reference Wells)

Davis Site - Smithfield RI

Well ID amp Sample Collection Date RIGA OW-008 OW-021 OW-034 OW-038 OW-080

Groundwater 11701 111301 1111201 111901 1111201 Constituents Units Standards

Benzene (ugl) 5 5U 5U 5U 5U 5U Toluene (ugl) 1000 5U 5U 5U 5U 5U Ethylbenzene (ugl) 700 5U 5U 5U 5U 5U Xylene (total) (ugl) 10000 5U 5U 5U 5U 5U 111-Trichloroethane (ugl) 200 5U 5U 5U 5U 5U 112-Trichloroethane (ugl) 5 5U 5U 5U 5U 5U 11-Dichloroethane (ugll) 5U 3J 5U 5U f-f 11-Dichloroethylene (ugl) 7 5U 5U 5U 5U 5U 124-Trichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U 12-Dichloroethane (ugl) 5 5U 5U 5U 5U 5U 14-Dichlorobenzene (ugl) 5U 5U 5U 5U 5U Chlorobenzene (ugl) 100 5U 5U 5U 5U 5U Chloroethane (ugl) 5U 5U 5U 5U 5U Chloroform (ugl) 5U 5U 5U 5U 5U cis-1 2-Dichloroethylene (ugl) 70 5U 5] 5U ZJ 5U Isopropylbenzene (ugl) 5U 5U 5U 5U 5U Methyl chloride (ugl) 1U 1U IU IU IU Tetrachloroethylene (ugll) 5 5U rJ 5U 5U 5U trans-l 2-Dichloroethene (ugll) 100 5U 5U 5U 5U 5U Trichloroethylene (ugl) 5 5U 5U 5UfJf 5U Trichlorofluoromethane (ugl) 5U 5U 5U 5U 5U Vinyl chloride (ugl) 2 1U 1U 1U ~j 1U Acetone (ugl) 20U 20U 20U 20U 20U Carbon disulfide (ugl) 5U 5U 5U 5U 5U Methyl ethyl ketone (ugl) 10 U IOU 10 U IOU 10 U Sum of Constituents (ugl) 0 13 0 5 0

Notes

U - Not detected at quantitation limit presented

J - Estimated Value

Sum of Constituents is a sum of detected compounds only

Only constituents detected at least once historically or in the Fa11200l sampling event are presented

P~t~~tj~~~~~~~~~~~i~~~~~ ~

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Laboratory Division of Thielsch Engineering Inc

February 192003

Matt Becker Environmental Science Services 401 Wampanoag Trail Suite 400 East Providence RI 02915

Dear Matt Becker

We appreciate this opportunity to provide you with our analytical services ESS Laboratory is committed to providing the highest quality service Our dedication to each client includes responsiveness to emergencies dependable well-written reports and client services which include the availability of all analysts to answer your inquiries

Enclosed is your data report The invoice fot this project is being forwarded to your Accounts Payable Department unless other arrangements have previously beenmade with the laboratory Samples will be disposed of thirty days after the final report has been mailed Ifyou have any questions or concerns please feel free to call our Customer Service Department We value our continued relationship and look forward to hearing from you in the future

Sincerely

ESS LABORATORY i i ( ] l shy

j I j -iH--- i __ r _ r j) 11 I i(~u r ~ t shy

e

Laurel Stoddard Laboratory Director

Enclosure

no

185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461-7181 Fax 40J -461middot4486httpwwwthieschcoITl An Eollml Oppnfltlni1) Employel

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Laboratory Division of Thielsch Engineering Inc

_-__------------------------ shyCERTIFICATE OF ANALYSIS

PROJECT NARRATIVE

CLIENT Environmental Science Services CLIENT PROJECT IDDavis ESS PROJECT ID 03020117

Sample Receipt 2 Surface Water samples and 1 Trip Blank were received on February 132003 for the analysis specified on the enclosed Chain of Custody Record

Analytical Summary The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan This plan utilizes the following methodologies US EPA SW-846 US EPA Methods for Chemical Analysis ofWater and Wastes per 40 CFR Part 136 APHA Standard Methods for the Examination ofWater and Wastewater American Society for Testing and Materials (ASTM) and other recognized methodologies The analyses with these noted observations are in conformance to the Quality Assurance Plan In chromatographic analysis manual integration may be used instead of automated integration because it produces more accurate results

Volatile Organics Analysis Blank Spike was outside of the recommended range for Vinyl Acetate This analyte was biased high however samples were non detect for this analyte

No other observations noted

This signed Certificate ofAnalysis is our approved release of your analytical results Beginning with this Project Narrative the entire report has been paginated The Chain of Custody is the final report page This report should not be copied except in full without the approval of the laboratory

End of project narrative

Laurel ~dardEric Baanante Date Laboratory DirectorOperations Manager

() r~ 1 JJds Frances Avenue Crul1ston RJ 029 J0-221 J Tel 401-461-7181 Fax 401-46 J -4486 hrrpllwwwthielschcom -shy

An Ellla1 OppolIllnil Empllljir

ESS Laboratory Division of Thielsch Engineering Inc

CERTIFiCATE OF ANALYSIS

EPA Method 8260B Client Name Environmental Science Services Client Project ID Davis Client Sample ID SW-FS-PWI-021303 Date Sampled 211303 Analyst SVD Date Analyzed 211403 Test Name _______ 1112-Tetrachloroethane 11 I-Trichloroethane 1122-Tetrachloroethane 112-Trichloroethane 11-Dichloroethane 11-Dichloroethene 11-Dichloropropene 123-Trichlorobenzene 123-Trichloropropane 124-Trichlorobenzene 124-Trimethylbenzene 12-Dibromo-3 -Chloropropane 12-Dibromoethane 12-Dichlorobenzene 12-Dichloroethane 12-Dichloropropane 135-Trimethylbenzene

13-Dichlorobenzene 13-Dichloropropane 14-Dichlorobenzene I-ChI oro hexane 22-Dichloropropane 2-Butanone 2-Chlorotoluene 2-Hexanone 4-Chlorotoluene 4-Isopropyltoluene 4-Methyl-2-Pentanone Acetone Benzene Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon Disulfide Carbon Tetrachloride

Result ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND

ESS Project ID 03020117 ESS Sample ID 03020117-01 Units JlglL Dilution 1 Percent Solid NA SampleAmount 10 ml

MRL 1 1 1 1 1 1 1 1 1 I 1 5 1 1 1 1 1 1 1 1 1 1

25 1

10 1 1

10 25

1 1 1 1 1 2 1 1

Page 1 of2 MDPn n I) UUL

185 Frances Avenue Cran~t()n RI 02910-2211 TeL 40 1-461-71 8 I Fax 401-461-4486 httpwwwthielschcom

ESSLaboratory Division of Thielsch Engineering Inc

----------------------------~-~----------CERTIFICATE OF ANALYSIS

Client ProjectID Davis ESS Project ID 03020117 Client Sample ID SW-FS-PWI-021303 ESS Sample ID 03020117-01

Test Name Result MRL Chlorobenzene ND 1 Chloroethane ND 2 Chlorofonn ND 1 Chloromethane ND 2 cis- 2-Dichloroethene ND 1 cis-l3 -Dichloropropene NO 05 Dibrornochloromethane NO 1 Dibrornomethane NO 1 Dichlorodifluoromethane ND 2 Diethyl Ether NO 1 Ethylbenzene ND 1 Hexachlorobutadiene ND 06 Isopropylbenzene NO 1 Methyl tert-Butyl Ether NO 1 Methylene Chloride ND 2 n-Butylbenzene ND 1 n-Propylbenzene ND I Naphthalene NO 1 sec-Butylbenzene NO 1 Styrene ND 1 tert-Butylbenzene ND 1 Tetrachloroethene ND 1 Tetrahydrofuran NO 5 Toluene ND 1 trans-l2-0ichloroethene NO 1 trans- 3-Dichloropropene ND 05 Trichloroethene ND 1 Trichlorofluoromethane NO 2 Vinyl Acetate NO 1 Vinyl Chloride NO 2 Xylenes (Total) ND 2 MRL = Method Reporting Limit ND =Not Detected above MRL

I Li--- L Approved By_____ri_)_______ Date ~~ -- - I g IG Page 2of2 fI7Jmiddot I rtv MDPn ( )

~ j ~ t

185 Frances Avenue Cranston RI 02910-2211 Tel 401-461-7181 Fax 401-461-4486 bltpllwwwthielschcol11 v

An ElIill Oppnmillhy Eml1luytf

ESS Laboratory Division of Thielsch Engineering Inc

--------- --__-__----__--shyCERTIFICATE OF ANALYSIS

EPA Method 8260B Client Name Environmental Science Services ESS ProjectID 03020117 Client ProjectID Davis ESS Sample ID 03020117-02 Client Sample ID SW-FS-PW2-021303 Units IlgiL Date Sampled 21303 Dilution 1 Analyst SVD Percent Solid NIA Date Analyzed 211403 Sample Amount 10 ml Test Name Result MRL 1112-Tetrachloroethane ND 1 11 I-Trichloroethane ND I 1122-Tetrachloroethane ND 1 112-Trichloroethane ND 1 11-Dichloroethane ND 1 11-Dichloroethene ND 1 11-Dichloropropene ND 1 123-Trichlorobenzene ND 1 123-Trichloropropane ND 1 124-Trichloro benzene ND 1 124-Trimethylbenzene ND 1 12-Dibromo-3-Chloropropane ND 5 12-Dibromoethane ND 1 12-Dichlorobenzene ND 1 12-Dichloroethane ND 1 12-Dichloropropane ND 1 135-Trimethylbenzene ND 1 13-Dichlorobenzene ND 1 13-Dichloropropane ND 1 14-Dichlorobenzene ND 1 l-Chlorohexane ND 1 22-Dichloropropane ND 1 2-Butanone ND 25 2-Chlorotoluene ND 1 2-Hexanone ND 10 4-Chlorotoluene ND 1 4-Isopropy ltoluene ND 1 4-Methyl-2-Pentanone ND 10 Acetone ND 25 Benzene ND 1 Bromobenzene ND 1 Bromochloromethane ND 1 Bromodichloromethane ND 1 Bromofonn ND I Bromomethane ND 2 Carbon Disulfide ND 1 Carbon Tetrachloride ND 1

Page 1 of2 MDP r r t) tJ L_

185 Frances Avenue Cranston RI 02910middotmiddot2211 Tel 40J-461-7181 Fax 401-461-4486 httpwwwthielsellcom An E~lIu Oppmltmity Empioycr

ESS Laboratory Division of Thielsch Engineering Inc

CERTIFICATE OF ANALYSIS

Client Project ID Davis Client Sample ID SW-FS-PW2-021303 Test Name Chlorobenzene Chloroethane Chlorofonn Chloromethane cis-l 2-Dichloroethene cis-l3-Dichloropropene Dibromochloromethane Dibromomethane Dichlorodifluoromethane Diethyl Ether Ethylbenzene Hexach1orobutadiene Isopropylbenzene Methyl too-Butyl Ether Methylene Chloride n-Butylbenzene n-Propylbenzene Naphthalene sec-Butylbenzene Styrene tert-Butylbenzene Tetrachloroethene Tetrahydrofuran Toluene trans-l2-Dichloroethene trans-l3-Dichloropropene Trichloroethene Trichlorofluoromethane Vinyl Acetate Vinyl Chloride Xylenes (Total)

MRL = Method Reporting Limit

ESS Project ID 03020117 ESS Sample ID 03020117-02

Result ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NO

ND =

MRL 1 2 1 2 1

05 1 1 2 1 1

06 1 1 2 1 1 1 1 1 1 1 5 1 1

05 1 2 1 2 2

Not Detected above MRL

~ A1(IjApproved By____--4r=-ii~Lmiddot-__- ___ Date d r lCXo 3

1

Page 2 of2 MDPn n c1- lt __i~

185 France Avenue Cranston Rl 02910-2211 Tel 401-461-7181 Fax 401-46 J -4486 htrp(wwwthielschcom An Eqlwl OppnrluoilY Einptoycr

ESS Laboratory Division ofThielsch Engineering Inc

CERTIFICATE OF ANALYSIS

EPA Method 8260B Client Name Environmental Science Services Client Project ID Davis Client Sample ID TB-021303-1 Date Sampled 21303 Analyst SVD Date Analyzed 21403 Test Name Result 1112-Tetrachloroethane ND 11-Trichloroethane ND 1122-Tetrachloroethane ND 112-Trichloroethane ND ll-Dichloroethane ND 11-Dichloroethene ND 1 I-Di chloropropene ND 123-Trichlorobenzene ND 123 -Trichloropropane ND 124-Trichlorobenzene ND 124-Trimethylbenzene ND 12-Dibromo-3-Chloropropane ND 12-Dibromoethane ND 12-Dichlorobenzene ND 12-Dichloroethane ND 12-Dichloropropane ND 135-Trimethylbenzene ND 13-Dichlorobenzene ND 13-Dichloropropane ND 14-Dichlorobenzene ND l-Chlorohexane ND 22-Dichloropropane ND 2-Butanone ND 2-Chlorotoluene ND 2-Hexanone ND 4-Chloroto luene ND 4-Isopropyltoluene ND 4-Methyl-2-Pentanone ND Acetone ND Benzene ND Bromobenzene ND Bromochloromethane ND Bromodichloromethane ND Bromoform ND Bromomethane ND Carbon Disulfide 305 Carbon Tetrachloride ND

ESS Project ID 03020117 ESS Sample ID 03020117-03 Units flgL Dilution 1 Percent Solid NIA Sample Amount 10 ml

---- shy

MRL 1 1 1 1 1 1 1 1 1 1 1 5 1 1 1 1 1 1 1 1 1 1

25 1

10 1 1

10 25

1 1 1 1 1 2 1 1

Page 1 of2 MDPn n (-J U )

185 Fmnces Avenue Cranston RI 029 o-2211 Tel 401-461-7181 Fax 401-461-4486 htipllwwwthielschcom

ESS Laboratory Division ofThielsch Engineering Inc

CERTIFICATE OF ANALYSIS

EPA Method 8260B Client Name Environmental Science Services Client Project ID Davis Client Sample ID TB-021303-1 Date Sampled 21303 Analyst SVD Date Analyzed 21403 Test Name Result 1112-Tetrachloroethane ND 11-Trichloroethane ND 1122-Tetrachloroethane ND 112-Trichloroethane ND ll-Dichloroethane ND 11-Dichloroethene ND 1 I-Di chloropropene ND 123-Trichlorobenzene ND 123 -Trichloropropane ND 124-Trichlorobenzene ND 124-Trimethylbenzene ND 12-Dibromo-3-Chloropropane ND 12-Dibromoethane ND 12-Dichlorobenzene ND 12-Dichloroethane ND 12-Dichloropropane ND 135-Trimethylbenzene ND 13-Dichlorobenzene ND 13-Dichloropropane ND 14-Dichlorobenzene ND l-Chlorohexane ND 22-Dichloropropane ND 2-Butanone ND 2-Chlorotoluene ND 2-Hexanone ND 4-Chloroto luene ND 4-Isopropyltoluene ND 4-Methyl-2-Pentanone ND Acetone ND Benzene ND Bromobenzene ND Bromochloromethane ND Bromodichloromethane ND Bromoform ND Bromomethane ND Carbon Disulfide 305 Carbon Tetrachloride ND

ESS Project ID 03020117 ESS Sample ID 03020117-03 Units flgL Dilution 1 Percent Solid NIA Sample Amount 10 ml

---- shy

MRL 1 1 1 1 1 1 1 1 1 1 1 5 1 1 1 1 1 1 1 1 1 1

25 1

10 1 1

10 25

1 1 1 1 1 2 1 1

Page 1 of2 MDPn n (-J U )

185 Fmnces Avenue Cranston RI 029 o-2211 Tel 401-461-7181 Fax 401-461-4486 htipllwwwthielschcom

ESS Laboratory Division of Thielsch Engineering Inc

CERTIFICATE OF ANALYSIS

Client Project ID Davis Client Sample ID TB-021303-1 Test Name Chlorobenzene Chloroethane Chlorofonn Chloromethane cis-I2-Dichloroethene cis 1 3-Dichloropropene Dibromochloromethane Dibromomethane Dichlorodifluoromethane Diethyl Ether Ethylbenzene Hexachlorobutadiene Isopropylbenzene Methyl tert-Butyl Ether Methylene Chloride n-Butylbenzene n-Propylbenzene Naphthalene

sec-Butylbenzene Styrene tert-Butylbenzene Tetrachloroethene Tetrahydrofuran Toluene trans-l2-Dichloroethene trans-l3Dichloropropene Trichloroethene Trichlorofluoromethane Vinyl Acetate Vinyl Chloride Xylenes (Total) MRL = Method Reporting Limit

~---------------------------------- shy

ESS Project ID 03020117 ESS Sample ID 03020117-03

Result ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND

ND =

MRL 1 2 1 2 1

05 1 1 2 1 1

06 1 1 5 1 1 1 1 1 1 1 5 1 1

05 1 2 1 2 2

NotDetected above MRL

Approved By_____-+-i~yen_middot)______ f

Page 2 of2 MDP0n7L V f

185 Frances Avenue Cranston RJ 0291 O~22 J I TeL 401-46) -7) 8] Fax 401-461-4486 httpwwwthielschcom

QUALITY CONTROL SECTION

I

I

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ESS Laboratory Division of Thielsch Engineering Inc

----__------------_bull_---_bull--------------__-----__---___-----shyCERTIFICATE OF ANALYSIS

EPA Method 8260B Surrogate Report

Client Name Environmental Science Services

Client Project ID Davis ESS Project ID 03020117

Lab ID (Dilution Factor) 12-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene 03020117-01 (lx) 95 11 0 113 03020117-02 (Ix) 96 111 114 03020117-03 (Ix) 96 111 115 VAMH021403Bl (Ix) 96 111 112 VAMH021403Cl (lx) 99 99 97 ------------~~--------------------------------------~------------

Surrogate L1Illlts

12-Dichloroethane-d4 70 - 130 Toluene-d8 70 - 130 4-Bromofluorobenzene 70 -130

1middot Approved by-----iJ~difPmiddot_______ Date cl jqal

--~r)H~~---------------1 Page 1 of 1 MDP( no

J l)~) 185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461 -7181 Fax 401 -461 -4486 httpwwwlhielschcom

ESS Laboratory Division of Thielsch Engineering Inc

----__------------_bull_---_bull--------------__-----__---___-----shyCERTIFICATE OF ANALYSIS

EPA Method 8260B Surrogate Report

Client Name Environmental Science Services

Client Project ID Davis ESS Project ID 03020117

Lab ID (Dilution Factor) 12-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene 03020117-01 (lx) 95 11 0 113 03020117-02 (Ix) 96 111 114 03020117-03 (Ix) 96 111 115 VAMH021403Bl (Ix) 96 111 112 VAMH021403Cl (lx) 99 99 97 ------------~~--------------------------------------~------------

Surrogate L1Illlts

12-Dichloroethane-d4 70 - 130 Toluene-d8 70 - 130 4-Bromofluorobenzene 70 -130

1middot Approved by-----iJ~difPmiddot_______ Date cl jqal

--~r)H~~---------------1 Page 1 of 1 MDP( no

J l)~) 185 Frances Avenue Cranston RI 02910-2211 Tel 401 -461 -7181 Fax 401 -461 -4486 httpwwwlhielschcom

ESS Laboratory Division of Thielsch Engineering Inc

-------------~----

CERTIFICATE OF ANALYSIS

EPA Method 8260B Client Name Environmental Science Services Client Project ID Davis Client Sample IDMethod Blank Date Sampled NIA Analyst SVD Date Analyzed 21403 Test Name 1112-Tetrachloroethane 111-Trichloroethane 1122-Tetrachloroethane 112-Trichloroethane 11-Dichloroethane 11-Dichloroethene 11-Dichloropropene 123-Trichloro benzene 123-Trichloropropane 124-Trichlorobenzene 124-Trimethylbenzene 12-Dibromo-3-Chloropropane 12-Dibromoethane 12-Dichlorobenzene 12-Dichloroethane 12-Dichloropropane 135-Trimethylbenzene 13-Dichlorobenzene 13-Dichloropropane 14-Dichlorobenzene 1-Chlorohexane 22-Dichloropropane 2-Butanone 2-Chlorotoluene 2-Hexanone 4-Chlorotoluene 4-Isopropyltoluene 4-Methyl-2-Pentanone Acetone Benzene Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon Disulfide Carbon Tetrachloride

ESS Project ID 03020117 ESS Sample ID VAMH021403Bl Units J1g1L Dilution 1 Percent Solid NA Sample Amount 10 ml

Result MRL NO 1 ND 1 ND 1 ND 1 ND 1 NO 1 NDmiddot 1 ND 1 ND 1 ND 1 ND 1 ND 5 ND 1 ND 1 ND 1 ND 1 ND 1 ND 1 ND 1 ND 1 ND 1 ND 1 ND 25 ND 1 ND 10 ND 1 NO 1 ND 10 ND 25 ND 1 ND 1 ND 1 ND 1 ND 1 ND 2 ND 1 ND 1

Page 1 of2 MDP010 185 Frances Avenue Cranston RI 02910-2211 Tel 401-461-7181 Fax 401-461 -4486 httpwwwthielschcolTI

AI) bqutl 0P[ll)flniIY En)pkycl

ESS Laboratory Division ofThielsch Engineering Inc

---- --- shy bull_---------------------___---------------------~-

CERTIFICATE OF ANALYSIS

Client Project ID Davis ESS Project ID 03020117 Client SampleID MethodBlank ESS Sample ID VAMH021403Bl Test Name Result MRL Chlorobenzene ND 1 Chloroethane ND 2 Chlorofonn NO 1 Chloromethane ND 2 cis-l2-Dichloroethene ND 1 cis-l3-Dichloropropene ND 05 Dibromochloromethane ND 1 Dibromomethane NDI Oichlorodifluoromethane ND 2 Diethyl Ether NO 1 Ethylbenzene NO 1 Hexachlorobutadiene ND 06 Isopropylbenzene NO 1 Methyl tert~Butyl Ether NO 1 Methylene Chloride ND 5 n-Butylbenzene ND 1 n-Propylbenzene ND 1 N~~~ NO 1 sec-Butylbenzene ND 1 Styrene ND 1 tert-Butylbenzene ND 1 Tetrachloroethene NO 1 Tetrahydrofuran ND 5 Toluene NO 1 trans-l 2-Dichloroethene NO 1 trans-l3-Dichloropropene NO 05 Trichloroethene NO 1 Trichlorofluoromethane NO 2 Vinyl Acetate NO 1 Vinyl Chloride ND 2 Xylenes (Total) ND 2 ~M~RL~=~M7e~th~o~d~R~ep-o-rt~in-g-L~uru~~~t--------------------------~N~O~=~N~o~t~D~e~te-c~re-d~a~b-o-v-e~NfitL~

Approved By____----B--Il_)______ Oate__ifo-~24J+I-I)df4tj-Lmiddot7_-----t J i J)-

Page 2 of2 MDP r- -j t t_J J_ L

185 Frances Avenue Cranston RI 029JO-221 I Tel 401-461-71 8 1 FllX 401-46 -4486 httpwwwthielschcom

ESS Laboratory Division of Thielsch Engineering Inc

_-------- shyCERTIFICATE OF ANALYSIS

EPA Method 8260B Client Name Environmental Science Services Client Project ID Davis Client Sample ID Laboratory Control Sample

Date Sampled NIA AnalySt SVD Date Analyzed 211403

9ompound 1112-Tetrachloroethane 11 I-Trichloroethane 1122-Tetrachloroethane 112-Trichloroethane 11-Dichloroethane 11-Dichloroethene 11-Dichloropropene 123-Trichlorobenzene 123-Trichloropropane 124-Trichlorobenzene 124-Trimethylbenzene 12-Dibromo-3-Chloropropane 12-Dibromoethane 12-Dichlorobenzene 12-Dichloroethane 12-Dichloropropane 135-Trimethylbenzene 13-Dichlorobenzene 13-Dichloropropane 14-Dichlorobenzene l-Chlorohexane 22-Dichloropropane 2-Butanone 2Chlorotoluene 2-Hexanone 4-Chlorotoluene 4-Isopropyltoluene 4-Methyl-2-Pentanone Acetone Benzene Bromobenzene Bromochloromethane Brornodichloromethane Bromoform Bromomethane Carbon Disulfide

SpIke Added

25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25

LCS Concentration

239 257 264 26

235 273 257 266 245 245middot 235 30

246 252 248 236 248 243 244 249 28

261 32

238 281 244 24

318 301 24 26

258 266 25

266 242

ESS Project ID 03020117 ESS SampleID VAMH021403Cl Units ~glL

Dilution 1 Percent Solid NA Sample Amount 10 ml

LCS Percent QC Recovery Recovery Limits

96 70-130 103 70-130 106 70-130 104 70-130 94 70-130 109 70-130 103 70-130 106 70-130 98 70-130 98 70-130 94 70-130 120 70-130 98 70-130 101 70-130 99 70-130 94 70-130 99 70-130 97 70-130 98 70-130 100 70-130 112 70130 104 70-130 128 70-130 95 70-130 112 70-130 98 70-130 96 70-130 127 70-130 120 70-130 96 70-130 104 70-130 103 70-130 106 70-130 100 70-130 106 70-130 97 70-l30

Page 1 of2 J85 Frances Avenue Cranston Rl 02910-2211 Tel 401-461-7181 Fax 401-461-4486 httpwwwthielschcom

An rAllH Opponunily Fmpluytr

ESS Laboratory Division of Thielsch Engineering Inc

____________~_ ___40_________________bull__~___~-shy

CERTIFICATE OFANALYSIS

Client Project ID Davis ESS Project ID 03020117 Client Sample IDLaboratory Control Sample ESS Sample ID VAMH021403C]

Spike LCS LCS Percent QC Recovery Compound Added Concentration Recovery Limits Carbon Tetrachloride 25 248 99 70-1~0 Chlorobenzene 25 247 99 70-1pound0 Chi oro ethane 25 263 105 70-130 Chlorofonn 25 244 98 70-1$0 Chloromethane 25 248 99 70-1S0 cis-12-Dichloroethene 25 25 100 70-1$0 cis-l3-Dichloropropene 25 247 99 70-QO Dibromochloromethane 25 256 102 70-130 Dibromomethane 25 265 106 70-1$0 Dichlorodifluoromethane 25 245 98 70-1io Ethy1benzene 25 246 98 70-1~0

Hexachlorobutadiene 25 247 99 70-1~0

Isopropylbenzene 25 266 106 70-lio Methyl tert-Butyl Ether 25 271 108 70-qO Methylene Chloride 25 259 104 70-130 n-Butylbenzene 25 239 96 70-1~0

n-Propylbenzene 25 246 98 70-130 Naphthalene 25 226 90 70-1~0 sec-Butylbenzene 25 235 94 70-130 Styrene 25 262 105 70-1~0 tert-Butylbenzene 25 234 94 70-130 Tetrachloroethene 25 262 105 70-130 Tetrahydrofuran 25 317 127 70-QO Toluene 25 252 101 70-do trans-l2-Dichloroethene 25 266 106 70-1~0 trans-l3 -Dichloropropenemiddot 25 266 106 70-130

Trichloroethene 25 248 99 70-130 Trichlorofluoromethane 25 321 128 70-l~0 Vinyl Acetate 25 507 203+ 70-UO Vinyl Chloride 25 266 106 70-UO Xylenes (Total) 75 772 103 70-do + = Outside QC Limits MDL = Method Detection Limit MRL = Method Reporting Limit ND =Not Detected above MDL

____

Approved By ___--lIWtD-_______ Date ~ tk- II

----~7r~~~-----------4-

Page 2 of2 MqP) ULj

185 Prances Avenue Cranston RI 02910-2211 Tel 401-461-7181 Fax 401-461-4486 httpwwwthielschcom II

ESS LABORATORY CERTIFICATIONS

US Anny Corps ofEngineers Soil and Water

Navy Installation Restoration QA Program Soil and Water

Connecticut PH-0750

Maine RI002

Maryhind 301 Potable Water

Massachusetts M-RI002

New Hampshire (NELAP) Drinking Water 242400-C

Wastewater 242400-D

New Jersey (NELAP) RI002 Potable Water

Non Potable Water Solid and Hazardous Waste

New York (NELAP) 11313 Potable Water

Non Potable Water Solid and Hazardous Waste

North Carolina 44701 Potable Water(Organics)

Pennsylvania 68-934

Rhode Island 179

United States Department ofAgriculture Soil Permit S-54210

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ESS Laboratory CHAIN OF CUSTODY Page --------_ of ---__ Division of Thielsch Engil1eeling Inc 185 Frances Avenue Cranston RI 02910-2211 Turn Time ~ Standard (2 iceks) Other ----_____ Electronic Ddiven1bles Tel (401) 461-7181 Fax (401) 461-4486 r-Iffstcmiddot thar5darsprmiddoto_r~IWi) pro I1middotalo~r)-1middota1b)middotbb( middot sr~ql1ired-====-1 _ Yes __ No

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JOB_l00j A~vgtpoundi~~____________ ENVIRONMENTAL SCIENCE SERVICES INC

SHEETNO ________ OF___--___888 Worcester Street Suite 240 Wellesley Massachusetts 02482 CALCULATED BY_______ DATE 3 - gtlt- 0(

CHECKEDBY________ DATE ______(781) 431-0500

SCALE

~ ~

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1middotmiddot_middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot_middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot_middotmiddotmiddotmiddotmiddotmiddot+middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot

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1

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PIIlIlIXT2Dl-1 (SingII_)~1 (~~ GtoIonIIusOI471 ToOdefPIIINETUll AlEE l-1OO-225-QIIO

ROAD BOX WITH LOCKING LID

PLACE --jjl

GROUT ROAD BOX IN PLACE

1-4-- 2 OIA PVC RISER

(flush mount or standpipe)

GROUT CASING IN

BENTONITE SEAL (minimum 2 foot thickness)

14+--- minimum 1 foot between bentonite seal and screen

II II II II I II

II II II II

II II 11--+---2 OIA PVC WELL SCREEN

IIII

II (0Q10 slot Schedule 40 10 foot length) II II II II I II II II II II

II II II II I

FILTER PACK 11 II II (00 or OON well gravel will be used) 1 II

II I

II II II Borehole Diameters II

II II 55 inch - Sonic (Unconsolidated) II 45 inch - Drive and Wash (Unconsolidated) II

~4 inch - Rotary Core (Bedrock) ~375 inch - Air Hammer (Bedrock)

END CAP II II

NOT TO SCALE

Monitoring Well Schematic FIGURE NO

(Unconsolidated Deposits and Bedrock)

Davis Liquid Waste Superfund Site PROJECT NO

Phase 2 Well Installation Program A365-0021

lESS TTemplatesBlocksPortraitBlockppt

1. barcodetext SDMS DocID 471017
2. barcode 471017

ROAD BOX WITH LOCKING LID

PLACE --jjl

GROUT ROAD BOX IN PLACE

1-4-- 2 OIA PVC RISER

(flush mount or standpipe)

GROUT CASING IN

BENTONITE SEAL (minimum 2 foot thickness)

14+--- minimum 1 foot between bentonite seal and screen

II II II II I II

II II II II

II II 11--+---2 OIA PVC WELL SCREEN

IIII

II (0Q10 slot Schedule 40 10 foot length) II II II II I II II II II II

II II II II I

FILTER PACK 11 II II (00 or OON well gravel will be used) 1 II

II I

II II II Borehole Diameters II

II II 55 inch - Sonic (Unconsolidated) II 45 inch - Drive and Wash (Unconsolidated) II

~4 inch - Rotary Core (Bedrock) ~375 inch - Air Hammer (Bedrock)

END CAP II II

NOT TO SCALE

Monitoring Well Schematic FIGURE NO

(Unconsolidated Deposits and Bedrock)

Davis Liquid Waste Superfund Site PROJECT NO

Phase 2 Well Installation Program A365-0021

lESS TTemplatesBlocksPortraitBlockppt

1. barcodetext SDMS DocID 471017
2. barcode 471017