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24 PARALLEL STREET-PHASE 1 SITE INVESTIGATION-NO. 2 FUEL OIL RELEASEClean Soils Environmental, Ltd. PO Box 591 Ipswich, MA 01938 (978) 356-1177 cleansoils.com February 25, 2022 City Hall 93 Washington Street Salem, MA 01970 Attn: Mayor Kimberley Driscoll, Mayor Attn: David Greenbaum, RS, Health Agent Subject: MCP Public Involvement Notification Phase I Initial Site Investigation and Tier Classification Submittal No. 2 Fuel Oil Release 24 Parallel Street Salem, MA 01970 RTN 3-36737 Dear City Officials, Pursuant to the Public Involvement requirements of the Massachusetts Contingency Plan (MCP), collectively referred to as 310 CMR 40.0000, and more specifically 310 CMR 40.1403(3)(e), this letter is intended to provide notification that the above-referenced Phase I Initial Site Investigation and Tier Classification Submittal is available concerning the above-referenced location. The above-referenced location has been classified as a Tier I disposal site. The following is an excerpt of the Summary and Conclusions section of the report.  On February 12, 2021, at approximately 1:00 PM a sudden release of an estimated 67 gallons of No. 2 Fuel Oil from a leaky aboveground storage tank (LAST) that subsequently impacted soil and groundwater within the residence at 24 Parallel Street in Salem, Massachusetts (the Property). Pursuant to 310 CMR 40.0311(1), the sudden release constitutes a two-hour notification condition. On February 12, 2021, at 2:11 PM the release was reported to the MassDEP by the oil supplier and burner servicer for the Property, Arctic Oil Company (AOC), and the release was assigned RTN 3-36737.  Immediate Response Actions (IRA) conducted to address the OHM release included the removal of the former LAST, deployment of absorbent materials to the impacted sump water to contain the Light Non-Aqueous Phase Liquid (LNAPL), pumping 1,052 gallons of petroleum impacted groundwater from the sump for off-site recycling, the on-site treatment of 21,230.8 gallons of remedial wastewater from the sump and subsequent discharge to the municipal sewer system as authorized by the Southeast Sewer District (SESD), the containerizing of four (4) 55-gallon drums of spent granular activated carbon (GAC) from the treatment system shutdown and oily solids, and the removal of 32.12 tons (approximately 26.43 cubic yards) of OHM impacted soil for off- site recycling.  The horizontal and vertical extent of the impacted soil at the site was measured to extend approximately 27 feet long by up to 16 feet wide and no deeper than 5.0 feet bgs within the residential basement, sump #1, former porch, and exterior trench. All confirmatory soil sample analytical results were below the applicable MCP Method 1 Soil Standards (S-1/GW-2/3) except for soil samples “PX-31” and “PX-52”, located in areas where structural limitations of the field stone foundation prevented further soil removal. Public Notification 24 Parallel Street, Salem, MA 01970 RTN 3-36737 | CSE Project No.: 2021.11 February 25, 2022 | Page: 2  The potential for exposure to accessible (surface) soils is considered low because a significant portion of impacted soil has been removed and replaced with clean fill. Residual impacted soil is considered potentially accessible in the vicinity of the open excavation near Sump-1 and isolated subsurface oil located beneath the concrete floor and foundation of the Property dwelling. Contact with potentially accessible soil could occur to environmental personnel conducting assessment and response actions, utility workers installing or maintaining underground utilities, or to construction workers in the event that future soil is excavated. Therefore, the potential for ingestion of contaminated soil, inhalation of contaminated air or fugitive dust, and dermal absorption from contaminated soil is considered to be unlikely under ordinary site activities, but could occur during excavation, construction, or utility repair activities.  The residual groundwater analytical results from sump #1 and the two (2) on-site and downgradient groundwater monitoring wells (CSE-1 and CSE-2) were below the applicable MCP Method 1 Groundwater Standards (GW-2/3), indicating groundwater is not significantly impacted by this release, and is not migrating off of the Property.  The potential for exposure to groundwater is considered low and is limited to environmental personnel conducting assessment and response actions and are equipped with the proper personal protective equipment (PPE) to limit exposure to ingestion of contaminated groundwater and dermal absorption from contaminated groundwater. Groundwater at the Site is not utilized as a current or potential drinking water source. No private or public drinking water supply wells have been impacted by the subject release. As such, drinking water has not been identified as a current or potential exposure pathway for this release.  Vapor migration assessment activities identified a complete vapor intrusion (VI) pathway for the current and foreseeable future use in accordance with MassDEP Policy #WSC-16-435. On December 1, 2021, the MassDEP and homeowners of the Property were notified of a measured Critical Exposure Pathway (CEP) since OHM detected in the indoor air of the living space of the occupied residential dwelling is at concentrations above the MassDEP Threshold Values for residential exposure (TVr).  VI mitigation measures conducted to reduce the CEP have included the installation of poly-sheeting vapor barriers in the vicinity of the basement sump, ventilation using windows and doors, and following the Sump #1 excavation activities, a new concrete bottom was poured, and a containment area was constructed around the sump to reduce the migration of vapor from residual petroleum located within the fieldstone foundation and/or areas of structural limitation. If necessary, additional exposure pathway mitigation measures shall be conducted as they become apparent, and the Site will continue to be monitored for CEP conditions.  The Disposal Site has been classified as Tier I since one or more response actions are required as part of an IRA to eliminate or mitigate a CEP pursuant to 310 CMR 40.0414(3).  The Site does not currently meet the requirements of a Permanent Solution pursuant to the provisions of 310 CMR 40.1000 and as required by 310 CMR 40.0483(1)(g), Comprehensive Response Actions are necessary at the Disposal Site to further address the release associated with RTN 3-36737 at the Property. Public Notification 24 Parallel Street, Salem, MA 01970 RTN 3-36737 | CSE Project No.: 2021.11 February 25, 2022 | Page: 3 A copy of the submittal is available for public review at the MassDEP Northeast Regional Office located at 205B Lowell Street, Wilmington, MA 01887, telephone number 978-694-3200. An electronic copy of the submittal can be viewed online at https://eeaonline.eea.state.ma.us/portal#!/search/wastesite and enter RTN 3-36737. Also, in accordance with the requirements of 310 CMR 40.1403(6)(b), please find attached a copy of the pending legal notice to be published in a local newspaper. A copy of the Site Plan included in the report as Figure 2 showing the disposal site boundary is also attached. If you have any questions, please call the undersigned at 978-356-1177 (x1). Sincerely, CLEAN SOILS ENVIRONMENTAL, LTD. William H. Mitchell, Jr., LSP No.: 1965 President/Geologist 1 in = 7.2376 ft BF C# FM Bag Filter Carbon Filter Flow Meter Residence Former PorchRemoved and Replaced AST Sump #1 Sewer Line Recovery Well SG-01SG-02Sump #2 24 Parallel Street 22 Parallel Street Driveway NOTICE OF TIER CLASSIFICATION 24 Parallel Street Salem, MA 01970 RTN 3-36737 A release of oil and/or hazardous materials has occurred at this location, which is a disposal site as defined by M.G.L. c. 21E, § 2 and the Massachusetts Contingency Plan, 310 CMR 40.0000. To evaluate the release, a Phase I Initial Site Investigation was performed pursuant to 310 CMR 40.0480. The site has been classified as TIER I pursuant to 310 CMR 40.0500. On February 25, 2022, Mr. Steve Coddens, the Homeowner, filed a TIER I Classification Submittal with the Department of Environmental Protection (MassDEP). To obtain more information on this disposal site, please contact William H. Mitchell, Jr., LSP, Clean Soils Environmental, Ltd. at 978- 356-1177 x1. The Tier Classification Submittal and the disposal site file can be viewed at MassDEP website using Release Tracking Number (RTN) 3-36737 at http://eeaonline.eea.state.ma.us/DEP/wsc_viewer/main.aspx or at MassDEP, Northeast Regional Office, 205B Lowell Street, Wilmington, MA 01887, 978-694-3200. Additional public involvement opportunities are available under 310 CMR 40.1403(9) and 310 CMR 40.1404.