Ross Bennett at (603) 668-0880
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DES Waste Management Division 29 Hazen Drive; PO Box 95 Concord, NH 03302-0095 Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water Addendum 4 Saint-Gobain Performance Plastics Facility 701 Daniel Webster Highway Merrimack, New Hampshire 03054 NHDES Site No.: 199712055 Project Number: 36430 Prepared for: Saint-Gobain Performance Plastics Corp. 14 McCaffrey Street Hoosick Falls, New York 12090 Phone Number: (518) 686-6268 RP Contact Name: Chris Angier RP Contact Email: [email protected] Prepared By: Golder Associates Inc. 670 North Commercial Street Manchester, New Hampshire 03101 Phone Number: (603) 668-0880 Contact Name: Ross W. Bennett Contact Email: [email protected] Date of Report: September 25, 2020 Cover Sheet for Reports Template - Revised January 2011 September 25, 2020 Project No. 2014-2270 Mr. Jeff Marts New Hampshire Department of Environmental Services Waste Management Division P.O. Box 95, 29 Hazen Drive Concord, New Hampshire 03302-0095 RE: WORK PLAN FOR SAMPLING OF WATER SUPPLY WELLS AND PROVISION OF ALTERNATE WATER - ADDENDUM 4 SAINT-GOBAIN PERFORMANCE PLASTICS 701 DANIEL WEBSTER HIGHWAY, MERRIMACK, NEW HAMPSHIRE NHDES SITE NO. 199712055 Dear Mr. Marts: On behalf of Saint-Gobain Performance Plastics (SGPP), Golder Associates Inc. (Golder) is submitting this Addendum 4 to the New Hampshire Department of Environmental Services (NHDES) for work completed under the September 30, 2019 Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water (September 2019 Work Plan, Golder, 2019a). Work Plan and Addenda Golder submitted the Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water to NHDES on September 30, 2019 (September 2019 Work Plan, Golder, 2019a). In a letter dated October 3, 2019 (NHDES, 2019a), NHDES approved the sampling proposed in the September 2019 Work Plan and requested “a list of properties…for the next round of sampling that includes, but is not necessarily limited to, properties that are proximal to wells with PFOA concentrations that are above the AGQS of 12 ppt”. In response to the October 3, 2019 NHDES request, Golder submitted the Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 1 on November 1, 2019 (Work Plan Addendum 1, Golder, 2019b). In a letter dated November 5, 2019 (NHDES, 2019b) NHDES approved Work Plan Addendum 1 and requested: Sampling of water supply wells at schools and licensed childcare facilities within the Outer Boundary. Sampling or confirmation of water supply status of properties that were assumed to be connected to a public water supply and adjacent to properties that are eligible for alternate water. Implementation of a dynamic strategy that continues to work to identify impacted water supply wells. Golder responded to these requests in the Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 2 submitted to NHDES on December 16, 2019 (Work Plan Addendum 2, Golder, 2019c). In a letter dated December 17, 2019 (NHDES, 2019c) NHDES approved Work Plan Addendum 2 and requested sampling of school and childcare facilities connected to non-transient non-community public water supplies. Golder submitted the Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 3 to NHDES on January 6, 2020 (Work Plan Addendum 3, Golder, 2020a). NHDES approved Work Plan Addendum 3 in a letter dated January 7, 2020 (NHDES, 2020). Golder Associates Inc. 670 North Commercial Street, Suite 103, Manchester, NH 03101 T: +1 603 668-0880 F: +1 603 668-1199 Golder and the G logo are trademarks of Golder Associates Corporation golder.com Mr. Jeff Marts Project No. 2014-2270 New Hampshire Department of Environmental Services September 25, 2020 Identification of Wells for Sampling Golder used the following screening approach to identify properties for sampling or confirmation of water supply status under Addendum 4 as shown on Figures 1A through 1F and listed in Table 1: Proximal Parcels: properties that are within a 60-foot offset of the boundary of properties that have been offered interim alternate water since submittal of Addendum 3. Additional Parcels: select properties in areas adjacent to proximal parcels or in areas of relatively lower sample density Figure 1 identifies properties as “connection to PWS confirmed” if the properties have been identified as connected to public water by public water suppliers. Starting with Addendum 4, Golder will not include properties identified as “connection to PWS confirmed” in the addendum for sampling or confirmation of water supply status because public water suppliers have identified that these properties are connected. Properties within the Outer Boundary not currently identified for sampling under the 2019 Work Plan or associated addenda will be considered during the development of future addenda as described in Section 3.2 of the September 2019 Work Plan. Next Steps and Schedule Sampling and provision of alternate water at properties identified in the 2019 Work Plan and associated addenda will continue. SGPP will complete the following activities following NHDES approval of Work Plan Addendum 4: Initiate contact with and provide access agreements to owners of properties identified for sampling within 30 days of Addendum approval. Coordinate sampling of a property’s well(s) within 60 days of access agreement acceptance by the property owner(s). The schedule for responding to results and reporting to NHDES is included in Section 5 of the September 2019 Work Plan. If you have any questions regarding this Addendum, please call Mr. Ross Bennett at (603) 668-0880. Sincerely, Golder Associates Inc. Alistair P.T. Macdonald, P.G., LSP Ross Bennett, P.E. Senior Program Leader and Principal Senior Consultant and Associate APTM/RB:lrr https://golderassociates.sharepoint.com/sites/117234/project files/6 deliverables/00 - work plan and addenda/11 - addendum 4/2020-09-25 res well wp addendum 4.docx Attachments: Table 1 – Properties Identified for Potential Sampling – Addendum 4 Figures 1A through 1F – Properties Identified for Potential Sampling – Addendum 4 2 Mr. Jeff Marts Project No. 2014-2270 New Hampshire Department of Environmental Services September 25, 2020 References: Golder, 2019a. Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water. September 30, 2019. Golder, 2019b. Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 1. November 1, 2019. Golder, 2019c. Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 2. December 16, 2019. Golder, 2020. Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 3. January 6, 2020. NHDES, 2019a. Re: Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water. October 3, 2019. NHDES, 2019b. Re: Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 1. November 5, 2019. NHDES, 2019c. Re: Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 2. December 17, 2019. NHDES, 2020. Re: Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water – Addendum 3. January 7, 2020. 3 September 2020 Project Number: 2014-2270 Table 1: Properties Identified for Potential Sampling - Addendum 4 Work Plan for Sampling of Water Supply Wells and Provision of Alternate Water ADDRESS Likely Likely Not LOCATION ID TOWN STREET MAP BLOCK LOT SLUC STREET NAME Developed Developed NUMBER RWS-04001 Bedford 12 APPLEDOR RD 26 14 29 11 X RWS-04002 Bedford 17 APPLEDOR RD 26 14 22 11 X RWS-04003 Bedford 20 APPLEDOR RD 26 14 24 11 X RWS-04004 Bedford 23 APPLEDOR RD 26 14 21 11 X RWS-04005 Bedford 24 APPLEDOR RD 26 14 20 11 X RWS-04006 Bedford 7 APPLELEAF DR 26 14 26 11 X RWS-04007 Bedford APPLELEAF DR 26 14 19 22 X RWS-04008 Bedford APPLELEAF DR 26 14 25 22 X RWS-04009 Bedford 33 BACK RIVER RD 22 43 2 11 X RWS-04010 Bedford 34 BACK RIVER RD 22 39 3 11 X RWS-04011 Bedford 16 CAMELOT DR 26 5 50 11 X RWS-04012 Bedford 54 CAMELOT DR 26 5 45 11 X RWS-04013 Bedford 55 CAMELOT DR 26 5 23 11 X RWS-04014 Bedford 84 CAMELOT DR 26 5 38 11 X RWS-04015 Bedford 92 CAMELOT DR 26 5 36 11 X RWS-04016 Bedford 15 CHECKERBERRY LN 38 4 40 11 X RWS-04017 Bedford 17 CHECKERBERRY LN 38 4 44 11 X RWS-04018 Bedford 3 COBBLER LN 21 29 3 11 X RWS-04019 Bedford 5 COBBLER LN 21 29 4 11 X RWS-04020 Bedford 12 COBBLER LN 21 29 6 11 X RWS-04021 Bedford 21 EDINBURGH DR 21 27 74 11 X RWS-04022 Bedford 10 GAGE RD 33 21 1 11 X RWS-04023 Bedford 20 GAGE RD 33 20 3 11 X RWS-04024 Bedford 4 HEATHER DR 25 35 5 11 X RWS-04025 Bedford 37 HIGHLAND FARMS DR 26 6 29 11 X RWS-04026 Bedford 40 HIGHLAND FARMS DR 26 6 52 11 X RWS-04027 Bedford 41 HIGHLAND FARMS DR 26 6 30 11 X RWS-04028 Bedford 45 HIGHLAND FARMS DR 26 6 31 11 X RWS-04029 Bedford 54 HIGHLAND FARMS DR 26 6 58 11 X RWS-04030 Bedford 18 KAROLINA LN 25 60 9 11 X RWS-04031 Bedford 38 LEDGEWOOD RD 27 50 9 11 X RWS-04032 Bedford 242 LIBERTY HILL RD 33 10 0 11 X RWS-04033 Bedford 255 LIBERTY HILL RD 33 17 20 11 X RWS-04034 Bedford 283 LIBERTY HILL RD 33 24 0 11 X RWS-04035 Bedford 287 LIBERTY HILL RD 38 15 1 11 X RWS-04036 Bedford 291 LIBERTY HILL RD 38 15 2 11 X RWS-04037 Bedford 296 LIBERTY HILL RD 38 5 1 11 X RWS-04038 Bedford LIBERTY HILL RD 33 21 0 22 X RWS-04039 Bedford LIBERTY HILL RD 38 10 0 57 X RWS-04040 Bedford LIBERTY HILL RD 38 9 0 57 X RWS-04041 Bedford 14 MEADOW RD 38 16 0 11 X RWS-04042 Bedford 21 MEADOW