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Home My WebLink AboutChauncy St. #54 - 8/23/2007August 23, 2007 Mansfield Board of Health, Environmental Affairs 6 Park Row Mansfield, Massachusetts 02048 Mr. John D'Agostino Town Manager 6 Park Row Mansfield, Massachusetts 02048 Re: Availability & Summary of Phase III RAP Report Former Shell -branded Gasoline Station <{ 54 Chauncy Street Mansfield, Massachusetts MassDEP RTN 4-18634 To Whom It May Concern: �Jr�C�IO[11TN AUG 2 4 Z007 In accordance with the Massachusetts Contingency Plan (MCP) 310 CMR 40.1403 (3)(e), this correspondence serves as notification that a Phase III Remedial Action Plan (RAP) Report was submitted to the Massachusetts Department of Environmental Protection (MassDEP) for the above -referenced location (the disposal site). This Phase III RAP Report documents the planned remedial activities associated with RTN 4-18634. Planned remedial activities will include the continued monitoring and sampling of groundwater in/around the station facility. Remedial monitoring activities began in August 2005 and will continue until concentrations of petroleum hydrocarbons in this aquifer decrease. A copy of the Phase III RAP Report, as well as other applicable documents pertaining to the subject site, is available for review at the MassDEP Southeast Regional Office located at 20 Riverside Drive, Lakeside, MA 02347. If you have any questions please call the undersigned at (508) 404-1866. Sincerely, SOVEREIGN CZ LTING INC. �� Neil R. Schofiel Project Manager cc: MassDEP SERO D. Weeks, Motiva Enterprises LLC Phase III RAP Sovereign File EQ881 Eric D. Simpson, P.G. LSP Operations Manager 905B S. Main Street, Unit 202 • Mansfield, MA 02048 • Tel: 508-339-3200 • Fax: 508-339-3248 August 23, 2007 Mansfield Board of Health, Environmental Affairs 6 Park Row Mansfield, Massachusetts 02048 Mr. John D'Agostino Town Manager 6 Park Row Mansfield, Massachusetts 02048 Re: Availability & Summary of Phase II CSA Report Former Shell -branded Gasoline Station 54 Chauncy Street Mansfield, Massachusetts MassDEP RTN 4-18634 To Whom It May Concern: In accordance with the Massachusetts Contingency Plan (MCP) 310 CMR 40.1403 (3)(e), this correspondence serves as notification that a Phase II Comprehensive Site Assessment Report was submitted to the Massachusetts Department of Environmental Protection (MassDEP) for the above -referenced location (the disposal site). The following summarizes the conclusions of the report: 1. The facility is an active Exxon -branded (formally Shell -branded) gasoline and automotive service station located at 54 Chauncy Street; at the intersection of Chauncy Street and North Main Street in Mansfield, Massachusetts. The facility consist of a single -story station building with a small convenience store are, restrooms, an office area and three automobile service bays located on a 12, 295 square foot lot. The facility is located in a mix commercial/retail and residential area of Mansfield, Massachusetts. 2. The source of the petroleum -related impacts at the disposal site related to RTN 4-18634 is the former floor drains, floor drain trap and once existing oil/water separator. The majority of impacted soil in the source area was removed during RAM activities in 2004. Based on data collected since 2004, COC concentrations are exhibiting an overall decreasing trend. There are no known continuing sources. 3. Groundwater impacts above applicable GW-2 and GW-3 standards at the disposal site are limited to petroleum related compounds associated with floor drains and the former oil water separator. The most recent groundwater sampling conducted on June 13, 2007 documents only one monitoring well, MW-302, with COCs, but not above applicable Method 1 GW-2 and GW-3 standards. Well MW-507 in the center former oil water separator excavation has historically been documented to contain trace LNAPL The depth to groundwater at the disposal site is approximately 8 to 10 feet bgs. 905B S. Main Street, Unit 202 • Mansfield, MA 02048 • Tel: 508-339-3200 • Fax: 508-339-3248 4. The closest surface water body is a stream associated with Fulton Pond located approximately 0.2 miles southwest of the site. Given the limited extent of COC concentrations within the overburden aquifer, discharge of COCs to surface water or ecological receptors is not likely. 5. Soil vapor, surface water, or sediment impacts at this disposal site were not identified. Sovereign investigated GW-2 exceedances in accordance with methods acceptable to MassDEP published guidelines. 6. The primary migration pathway for petroleum released to the subsurface is determined to be via groundwater flow. Based on contaminant distribution documented at the site, concentrations of COCs in groundwater above applicable standards have migrated minimally, due likely to the lack of a significant vertical or horizontal hydraulic gradients. Subsurface utilities or subsurface man-made objects are not expected to provide a preferential migratory pathway for concentrations of dissolved -phase hydrocarbons. 7. Based on current data, SRM, CEP, of IH conditions were not identified at the disposal site. 8. There are no potential exposures to soil impacts at the disposal site based on an existing AUL for RTN 4-11144 which restricts access and exposure potential. Petroleum impacts related to RTN 4-18634 are limited to the facility boundaries, within the limits of an existing AUL. 9. A condition of "no significant risk', as defined by the MCP, does not exist at the site based upon a comparison of current soil and groundwater concentrations with applicable MCP standards (i.e., Method 1). As such, additional response actions are required. A copy of the Phase II CSA Report, as well as other applicable documents pertaining to the subject site, is available for review at the MassDEP Southeast Regional Office located at 20 Riverside Drive, Lakeside, MA 02347. Sincerely, SOVEREIGN CONSULTING INC. Erin Foley Field Scientist cc: MassDEP SERO D. Weeks, Motiva Enterprises LLC Mr. Nicholas Aganos Eric D. Simpson, P.G., LSP Operations Manager 6% E MV i 'oTr 'ac Environmental Services r Ib) August 23, 2005 !i BUGI �LI r05 Town of Mansfield Board of Health 6 Park Row PY-------- --__.t Mansfield, MA 02048 Re: Availability of Phase 1 Initial Site Investigation and Tier Classification ,-,-Former Shell Service Station f_54 Chauncy Street Mansfield, Massachusetts RTN 4.18634 To Whom It May Concern: In accordance with 310 CMR 40.1403, was completed for the above referenced location. The site was classified as a Tier II disposal site. A copy of the Legal Notice set to print in the Attleboro Sun Chronicle Newspaper on August 26, 2005 is attached. A copy of the report may be obtained at the Massachusetts Department of Environmental Protection Southeast Regional Office in Lakeville. If you have any questions, please contact the undersigned at (781) 769-5005. Sincerely, EnviroTrac Ltd., Eric D. Simpson, P.G. Senior Project Manager cc: MADEP SERO David Weeks, Motiva Enterprises LLC Town of Mansfield Selectmen's Office 1400 Providence Highway, Suite 2100, Norwood, MA 02062 (781) 769-5005 Fax: (781) 769-9345 NOTICE OF AN INITIAL SITE INVESTIGATION AND TIER II CLASSIFICATION FORMER SHELL -BRANDED GASOLINE STATION 54 CHAUNCY STREET, MANSFIELD, MA 4-18634 Pursuant to the Massachusetts Contingency Plan (310 CMR 40.0480), an Initial Site Investigation was performed at the above referenced location. A release of oil and/or hazardous materials occurred at this location which is a disposal site (defined by M.G.L. c. 21E, Section 2). This site was classified as Tier II, pursuant to 310 CMR 40.0500. Response actions at this site will be conducted by Motiva Enterprises LLC who has employed Brian G. Snow, LSP to manage response actions in accordance with the Massachusetts Contingency Plan (310 CMR 4.0000). M.G.L. c. 21E and the Massachusetts Contingency Plan provide additional opportunities for public notice of and involvement in decisions regarding response actions at disposal sites: 1) The Chief Municipal Official and Board of Health of the community in which the site is located will be notified of major milestones and events, pursuant to 310 CMR 40.1403; and 2) Upon receipt of a petition from ten or more residents of the municipality in which the disposal site is located, or of a municipality potentially affected by a disposal site, a plan for involving the public in decisions regarding response actions at the site will be prepared and implemented, pursuant to 310 CMR 40.1405. To obtain more information on this disposal site and the opportunities for public involvement during its remediation, please contact Brian G. Snow, P.G., LSP, Senior Project Manager, EnviroTrac Ltd, 1400 Providence Highway, Suite 2100, Norwood, Massachusetts at 781-769-5005.