Electronic Submittal June 11, 2013

Transcription

1 Electronic Submittal June, 203 Massachusetts Department of Environmental Protection Northeast Regional Office Bureau of Waste Site Cleanup 20B Lowell Street Wilmington, Massachusetts 0887 Re: Change in LSP-of-Record and Remedy Operation Status Report Former Exxon Service Station No Salem Street Malden, Massachusetts MassDEP RTN To Whom It May Concern: Pursuant to relevant sections of 30 CMR , the Massachusetts Contingency Plan (MCP), and 309 CMR , the regulations pertaining to Licensed Site Professionals (LSPs), this correspondence is to provide written notice of a change in the LSP-of-Record for the above referenced site. Effective as of the date of this letter (or as documented via the MCP Report submittal process), the undersigned will no longer serve as the LSP-of-Record for the above referenced site. Eric Henry (LSP # 984) of Kleinfelder will serve as the LSP-of-Record for this site until further notice. A completed Bureau of Waste Site Cleanup (BWSC) form BWSC-26 is enclosed. In addition, Kleinfelder, on behalf of ExxonMobil Environmental Services Company (EMES), has prepared a Remedy Operation Status Report for Former Exxon Service Station No located at 932 Salem Street, Malden, Massachusetts in accordance with 30 CMR Please find enclosed the edep transaction copy of the Bureau of Waste Site Cleanup (BWSC) forms BWSC-08 and 08A. The attached documents have been prepared under the direction of Licensed Site Professional (LSP) Mr. Eric Henry (LSP #984) of Kleinfelder. The EMES representative overseeing response actions associated with this submittal is Ms. Elizabeth E. Zinkevicz, EMES, 647 US Rt., #4, PMB 23, York, ME 03909; she may be reached by telephone at (207) Should you have any questions, please do not hesitate to contact the undersigned at (08) Sincerely, KLEINFELDER Bruce C. Ross, CPG, LSP Senior Project Manager Eric Henry, LEP, LSP Principal Hydrogeologist Cc: Ms. Elizabeth E. Zinkevicz, EMES (file) 2230/FRM3R0286_3004/ROS 06-3 Speen Street, Suite 200, Framingham, MA 070 p f

2 REMEDY OPERATION STATUS (ROS) REPORT On behalf of EXXONMOBIL ENVIRONMENTAL SERVICES COMPANY FORMER EXXON SERVICE STATION # SALEM STREET MALDEN, MASSACHUSETTS MADEP Release Tracking Number (RTN) Regulatory Status: ROS Opinion submitted August 6, 2007 Monitoring Period: December 202 through May 203 Work Performed: On February 26, 203, Kleinfelder personnel gauged and sampled six groundwater monitoring wells (MW-, MW-0, MW-202, MW- 203, MW-206 and MW-207). Refer to Plate for the site plan and historical groundwater flow direction. Groundwater samples were collected and submitted for laboratory analysis of volatile petroleum hydrocarbons (VPH) via Massachusetts Department of Environmental Protection approved methodology. Current groundwater analytical data are summarized in Table. All historical groundwater analytical data collected from previous consultants are summarized in Appendix A. Laboratory analytical results are presented in Appendix B. Groundwater Monitoring and Characteristics: On May 22, 203, Kleinfelder personnel gauged sixteen monitoring wells (MW-, MW-2, MW-0, MW-02, MW-03, MW- 0, MW-06, MW-20, MW-202, MW-203, MW-20, MW-206, MW-207, MW-302, MW-303, and MW-304). Refer to Table for gauging data. Groundwater elevation is depicted on a groundwater contour map included as Plate 2. Total number of active site wells: 7 Gauging and Sampling Frequency: Semi-annual Non-Aqueous phase liquid (NAPL) Detected: None Groundwater Classification: GW-2 / GW-3 Groundwater Depth: See Table Historic Groundwater Flow Direction: Southwest (locally variable) 2230/FRM3R0286 Page of 3 June, 203 Speen Street, Suite 200, Framingham, MA 070 p f

3 Significant Modifications to Monitoring Program or Corrective Measures Taken Pursuant to 30 CMR (2) During the May 22, 203 gauging event, monitoring wells MW-2 and MW-06 were dry. In addition, Kleinfelder personnel were unable to remove tubing found in MW-0 and therefore were unable to gauge the depth to groundwater at this location. There were no significant modifications or corrective measures taken during this monitoring period. Remedial Operation Status Evaluation Pursuant to 30 CMR (2) Concentrations of VPH analytes were below applicable Massachusetts Contingency Plan (MCP) Method GW-3 Groundwater Standards in groundwater samples collected and analyzed during this reporting period, with the exception of total xylenes concentrations in monitoring wells MW- and MW-0 in February 203 (Table ). Although monitoring wells MW-02 and MW-03 were not sampled during the reporting period, historical data included in Appendix A indicates that constituents of concern (COCs) have been generally below the laboratory reporting limit, and below the MCP Method GW-2 Groundwater Standards that would apply to these locations. If MCP Method GW-2 Groundwater Standards were to be conservatively applied to downgradient monitoring wells MW-203, MW-20, MW-206 and MW-207, there would be no exceedances of MCP Method GW-2 Groundwater Standards in groundwater collected from these wells during the February 203 sampling event. In addition, concentrations of COCs in groundwater collected from monitoring well MW-206 are not generally detected above the laboratory reporting limit, and this monitoring well is considered to be the most downgradient offsite well. On this basis, there is no likely risk of vapor intrusion into buildings downgradient of the subject property. Given the downward trends in concentrations of dissolved-phase petroleum and the decreasing trends in observed NAPL thickness in groundwater at the site, monitored natural attenuation and the use of absorbent socks for recovery of residual NAPL continues to be a feasible remedial approach for RTN Public Involvement Pursuant to 30 CMR (0)(c) In accordance with 30 CMR (0), property owners have been provided the results of the February 203 sampling event (Appendix C). FUTURE COURSE OF ACTIONS: On behalf of ExxonMobil Environmental Services Company, Kleinfelder provides the following timeline for upcoming actions associated with this site: Groundwater Monitoring/Sampling Event August 203 ROS Report on or before December 2, /FRM3R0286 Page 2 of 3 June, 203 Speen Street, Suite 200, Framingham, MA 070 p f

4 Limitations: Kleinfelder performed the services for this project under the Standard Procurement Agreement with Procurement, a division of ExxonMobil Global Services Company (signed on June 2, 2007). Kleinfelder states that the services performed are consistent with professional standard of care defined as that level of services provided by similar professionals under like circumstances. This report is based on the regulatory standards in effect on the date of the report. It has been produced for the primary benefit of Exxon Mobil Global Services Company and its affiliates. References: CDM, Remedy Operation Status Opinion Report. August 6, List of Appendices Plates Table Plate Site Plan and Groundwater Analytical Data BTEX and MTBE (2/26/203) Plate 2 Groundwater Contour Map (/22/203) Table Gauging and Groundwater Sample Analytical Results Volatile Petroleum Hydrocarbons Appendix A Historical Data Appendix B Groundwater Laboratory Analytical Data Appendix C Public Notification Letters 2230/FRM3R0286 Page 3 of 3 June, 203 Speen Street, Suite 200, Framingham, MA 070 p f

5 PLATES

6

7

8 TABLE

9 Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Service Station No Salem Street Malden, Massachusetts October 2, 20 through February 26, 203 Page of 3 Well ID (Groundwater Category) Date Top of Casing Elevation (feet) Depth to Water (feet) Depth to Hydrocarbon (feet) Hydrocarbon Thickness (feet) Corrected GW Elevation (feet) Benzene (µg/l) MCP GW Standard GW-2 MCP GW Standard GW-3 MW- (GW-3) MW-0 (GW-3) MW-06 (GW-3) MW-202 (GW-3) MW-203 (GW-3) 0/2/20 03/9/202 07/06/202 09/20/202 02/26/203 0/2/20 03/9/202 07/06/202 09/20/202 02/26/203 0/2/20 07/06/202 0/2/20 03/9/202 07/06/202 09/20/202 02/26/203 0/2/20 03/9/202 07/06/202 09/20/202 02/26/203 N/A N/A Gauging Data N/A N/A N/A N/A N/A N/A N/A N/A DRY DRY DRY DRY 28.9 DRY DRY DRY DRY DRY DRY DRY DRY Toluene (µg/l) Ethylbenzene (µg/l) Analytical Data Total Xylenes (µg/l) MTBE (µg/l) Naphthalene (µg/l) C - C8 Aliphatics (µg/l) C9 - C2 Aliphatics (µg/l) C9 - C0 Aromatics (µg/l) < < <0.0 < < < < < < < NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS < < < < < < < <30.0 < < < < <.00 <3.00 <.00 <6.00 <3.00 < <00 NS NS NS NS NS NS NS NS Comments Well Dry Well Dry NAPL Well Dry 3/2/203 Ref.: rpt_gaug_w_9_aq\ma VPH & Gauging\32\3004 Kleinfelder Speen Street, Suite 200, Framingham, MA

10 Table (Continued) Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Service Station No Salem Street Malden, Massachusetts October 2, 20 through February 26, 203 Page 2 of 3 Well ID (Groundwater Category) Date Top of Casing Elevation (feet) Depth to Water (feet) Depth to Hydrocarbon (feet) Hydrocarbon Thickness (feet) Corrected GW Elevation (feet) Benzene (µg/l) MCP GW Standard GW-2 MCP GW Standard GW-3 MW-206 (GW-3) MW-207 (GW-3) 0/2/20 03/9/202 07/06/202 09/20/202 02/26/203 0/2/20 03/9/202 07/06/202 09/20/202 02/26/203 N/A N/A Gauging Data N/A N/A N/A N/A N/A N/A N/A N/A Toluene (µg/l) Ethylbenzene (µg/l) Analytical Data Total Xylenes (µg/l) MTBE (µg/l) Naphthalene (µg/l) C - C8 Aliphatics (µg/l) C9 - C2 Aliphatics (µg/l) C9 - C0 Aromatics (µg/l) <2.0 <2.0 <2.0 <4.0 <.0 <3.0 <0 <0 <0 <.0 <2.0 <2.0 <4.0 <.0 <3.0 <0 <0 <0 <.00 <3.00 <.00 <6.00 <3.00 <.00 <00 <00 <00 <.0 <2.0 <2.0 <4.0 <.0 <3.0 <0 <0 <0 <.00 <3.00 <.00 <6.00 <3.00 < < <.0 < < < < <6.00 <3.00 < < <3.00 <.00 <6.00 <3.00 < <00 Comments 3/2/203 Ref.: rpt_gaug_w_9_aq\ma VPH & Gauging\32\3004 Kleinfelder Speen Street, Suite 200, Framingham, MA

11 Table (Continued) Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Service Station No Salem Street Malden, Massachusetts October 2, 20 through February 26, 203 Page 3 of 3 Notes: (GW-3) - well-specific groundwater category <.0 - Not detected at or above the laboratory reporting limit shown µg/l - micrograms per liter GW - Groundwater MTBE - methyl tertiary butyl ether NA - Not analyzed - Not detected NM - Not monitored NS - Not sampled NSVD - Not surveyed to vertical datum Shading - Reported concentration detected above the applicable standard(s) or guidance value(s) Data for a monitoring well not displayed for a specific date indicates well was intentionally omitted from the monitoring program. 3/2/203 Ref.: rpt_gaug_w_9_aq\ma VPH & Gauging\32\3004 Kleinfelder Speen Street, Suite 200, Framingham, MA

12 APPEIX A Historical Data

13 Page of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 NA NA NA NA NA 00,000 00,000 00,000 00,000 00,000 00,000 00,000 00,000 00,000 Upper Concentration Limits MW- /20/ NA NA , ,990,760 3, /7/ NA NA , ,720 < ,790 6,290 4,490 8/30/ NA NA ,448 < , ,90 9/27/ NS NS NS NS NS NS NS NS NS 0/30/ NS NS NS NS NS NS NS NS NS 7// NS NS NS NS NS NS NS NS NS 0/6/ NA NA ,90 633,690 < , ,30 /2/ NA NA , ,000 <0 7.3,00 2,370 3,40 4/2/ , ,30 < ,700 4,00 3,90 7/6/ NS NS NS NS NS NS NS NS NS 0/9/ , ,240 < ,400 6,640,90 /8/ , , ,900 2,920 7,220 4/8/ , , ,00 0,400,600 7/23/ , , ,800,320 6,340 0/9/ , , ,000,380 3,930 7/2/ NM NM NM NM,230 2, , ,00,60 4,90 MW-2 /20/ NS NS NS NS NS NS NS NS NS /7/ NS NS NS NS NS NS NS NS NS * 0/6/ DRY DRY NS NS NS NS NS NS NS NS NS MW-0 /2/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 7/23/ < <3.0 <.0 <00 <00.8 0/9/ < <3.0 < /2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 MW-02 /20/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 * 8/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/27/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/3/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /24/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 7// <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /22/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /22/2009 DUP <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 Toluene Total Xylenes MTBE Ethylbenzene Naphthalene C -C 8 Aliphatics C 9 -C 2 Aliphatics C 9 -C 0 Aromatics /7/202 Ref.#3004_Tbl_gauging vph

14 Page 2 of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Toluene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics C 9 -C 0 Aromatics MW-02 4/22/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 (Cont'd) 7/7/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/9/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 MW-03 /20/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /8/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 * 8/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/27/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/3/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /24/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 7// <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /2/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 4/2/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/7/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/9/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 MW-0 /20/ ,30 0,00 2,80, ,600,400 23, /8/ ,900 9,70,360,440 <0 86.2,600,620 2,370 8/30/ NS NS NS NS NS NS NS NS NS 9/27/ , ,240 < ,400,040,990 9/27/2007 DUP , ,20 < ,400,40 2,20 0/3/ ,900,440 8,70 < ,400,300 2,960 0/3/2007 DUP ,700,340 7,780 < ,600,20 2,830 /24/ NA NS NS NS NS NS NS NS NS NS 7// ,300,00 8,020 < ,900 2,300 2,770 7//2008 DUP ,700,220 8,970 < ,400 3,230 3,00 0/6/ ,060,00 7,660 < ,300,80 3,0 /7/202 Ref.#3004_Tbl_gauging vph

15 Page 3 of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Toluene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics C 9 -C 0 Aromatics MW-0 /2/ , , ,00 2,60 2,60 (Cont'd) 4/3/ ,230,0 8,00 < ,600 4,40 2,820 4/3/2009 DUP ,880,040 7,40 < ,600 3,990 2,70 7/6/ , ,80 < ,000 3,40 3,780 7/6/ , ,80 < ,000 3,40 3,780 7/9/2009 DUP , ,80 < ,400 3,780 3,460 0/9/ ,90 660,0 < ,300 3,900 2,630 0/9/2009 DUP , ,70 < ,800 4,0 2,980 /8/ ,720,360 9, ,000,60 4,20 /8/200 DUP ,080,00 0, ,600,660 4,0 4/8/ <.0 < <3.0 <.0 34 <00 3 4/8/200 DUP <.0 < <3.0 <.0 6 < /23/ ,20,80 6, ,00,780 2,70 7/23/0 DUP ,20,300 6, ,300 2,80 2,760 0/9/ ,070,230 9, ,900,670 2,80 0/9/200 DUP ,60,60 9, ,200 6,70 2,670 7/2/ NM NM NM NM 394 2, , ,00,290 3,990 MW-06 /20/ ,80,70,30 8, ,400 4,90 8, /8/ ,880 3, ,80 < ,30 3,0 2,970 8/30/ ,90 27,800 2,200 66,00 < ,400 4,200,900 9/27/ NM NM NS NS NS NS NS NS NS NS NS 0/30/ NM NM NS NS NS NS NS NS NS NS NS /24/ DRY DRY NS NS NS NS NS NS NS NS NS 7// DRY DRY NS NS NS NS NS NS NS NS NS 0/6/ DRY DRY NS NS NS NS NS NS NS NS NS 4/2/ DRY DRY NS NS NS NS NS NS NS NS NS 7/6/ DRY DRY NS NS NS NS NS NS NS NS NS 0/9/ DRY DRY NS NS NS NS NS NS NS NS NS /8/ DRY DRY NS NS NS NS NS NS NS NS NS 4/8/ , ,00 0,00 0,00 7/23/ DRY DRY NS NS NS NS NS NS NS NS NS 0/9/ DRY DRY NS NS NS NS NS NS NS NS NS /7/202 Ref.#3004_Tbl_gauging vph

16 Page 4 of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics MW-20 /20/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 8/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/27/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /23/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 6/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 4/3/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 7/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/9/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 MW-202 /20/ , ,770,000 2, /7/ < , /29/ ,074 < , /26/ ,246 < ,300 43,00 0/3/ ,220 < ,30,200 2,020 /24/ ,066 < ,320,660 3,930 6/30/ ,79 < ,760,230 2,060 0/6/ , ,32 < ,40 648,60 4/3/ ,764 < ,0,30,90 7/6/ ,20 < , ,400 7/6/ ,20 < , ,400 0/8/ ,207 < ,00 220,370 4/8/ ,40 09, ,790,00,30 7/23/ , , , ,670 0/9/ , ,220,20 2,490 7/2/ NM NM NM NM , ,00 429,80 Toluene C 9 -C 0 Aromatics /7/202 Ref.#3004_Tbl_gauging vph

17 Page of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics MW-203 /2/ , , ,30 2,280 4, /9/ < ,360,600,230 8/29/ , ,0 < ,00,30,660 9/26/ , ,028 < , ,480 0/30/ , ,760 < , ,70 /23/ , , ,20,00 3,940 6/30/ , ,40 < ,900,90 2,480 0/7/ ,74 < , ,220 4/2/ NM NM < , /6/ ,0 333,29 < ,440,020,820 7/6/ ,0 333,29 < ,440,020,820 0/8/ , , ,00 2 2,470 4/8/ , ,230 7/23/ ,270 <00 2,00 0/9/ , , ,490,30 4,320 7/2/ NM NM NM NM 6., , , ,830 MW-204 /2/ <3.00 <.00 <3.00 <.00 <00 <00 < /9/ <2.0 <2.0 <2.0 <2.0 < <0 <0 8/29/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/27/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /23/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 6/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /22/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 4/3/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/7/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/8/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <3.0 <.0 <3.0 <.0 <00 <00 <00 7/23/ <3.0 < <.0 27 <00.0 0/9/ <3.0 <.0 <6.0 <3.0 < <0.0 7/2/ NM NM NM NM 23.9 <3.0 < < <00 23 Toluene C 9 -C 0 Aromatics /7/202 Ref.#3004_Tbl_gauging vph

18 Page 6 of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics MW-20 /2/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /8/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 8/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/26/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/3/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /23/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 6/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /22/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 4/3/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/7/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/9/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 MW-206 /2/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /8/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 8/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 8/30/2007 DUP <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/27/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/3/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /24/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /24/2008 DUP <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 7// <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /22/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 4/3/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/7/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/9/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ < < < /23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 Toluene C 9 -C 0 Aromatics /7/202 Ref.#3004_Tbl_gauging vph

19 Page 7 of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics MW-207 /20/ ,0 < /9/ < , /29/ ,09 < , ,60 9/26/ < /3/ < ,040 /24/ < ,40 374,480 6/30/ < , /7/ <2.0 4.,60 47 /2/ <.0. 2, /2/ < , /6/ < , /6/ < , /8/ < ,380 37,640 4/8/ < /23/ , ,740,00,40 0/9/ ,30 8,20 7/2/ NM NM NM NM 87,280 3, , ,00 MW-302 /2/ <3.00 <7.34 U,930 < /2/2006 DUP <3.00 <6.77 U, /9/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 8/29/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/26/ < < /30/ , /23/ < < /30/ <2.0 <2.0 < <2.0 < < /7/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /2/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 4/2/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/6/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/6/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/8/ < <.0 < <0 37 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <.0 < <3.0 <.0 <00 0 <0 7/23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ < < /2/ NM NM NM NM < , Toluene C 9 -C 0 Aromatics /7/202 Ref.#3004_Tbl_gauging vph

20 Page 8 of 8 Well ID Date MCP GW Standard GW-2 MCP GW Standard GW-3 Top of Casing Elevation Appendix A - Table Gauging & Groundwater Sample Analytical Results - Volatile Petroleum Hydrocarbons Former Exxon Station # Salem Street Malden, Massachusetts November 20, 2006 through July 2, 20 Depth to Water Depth to Product NAPL Thickness Corrected GW Elevation Benzene Total Xylenes C -C 8 Aliphatics (feet) (feet) (feet) (feet) (feet) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) (μg/l) NA NA NA NA NA 2,000 0,000 20,000 9,000 0,000,000 3,000,000 7,000 NA NA NA NA NA 0,000 40,000,000,000 0,000 20,000 0,000 0,000 0,000 MTBE Ethylbenzene Naphthalene C 9 -C 2 Aliphatics MW-303 /2/ <.00 <3.00 <.00 <3.00 <.00 <00 <00 < /9/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /9/2007 DUP <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 8/29/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 9/26/ <2.0 <2.0 <2.0 < <0 <0 0/30/ <2.0 <2.0 <2.0 < <0 <0 /23/ <2.0 <2.0 <2.0 <2.0 < <0 <0 6/30/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/6/ <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 0/6/2008 DUP <2.0 <2.0 <2.0 <2.0 <3.0 <0 <0 <0 /2/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 4/2/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 7/7/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 0/8/ <2.0 <2.0 <2.0 <.0 <3.0 <0 <0 <0 /8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 4/8/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 7/23/ <.0 <3.0 <.0 <3.0 <.0 <00 <00 <00 0/9/ <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 7/2/ NM NM NM NM <.0 <3.0 <.0 <6.0 <3.0 <.0 <00 <00 <00 MW-304 /2/ ,66 < ,240 3,40 7, /9/ <2.0 < < /29/ < < /26/ < < /30/ < < /23/ < < /30/ < <2.0 < < /6/ < <2.0 < <0 7 /2/ < <.0 < <0 02 4/2/ < <.0 < <0 04 7/6/ < <.0 < /8/ < <.0 <3.0 3 <0 9.3 /8/ < <3.0 <.0 33 <00 2 4/8/ < /23/ < <3.0 <.0 36 < /9/ < <3.0 < < /2/ NM NM NM NM.2 < < < Note: * indicates monitoring well categorized as GW-2 and GW-3 Shading indicates an exceedance of GW-2 or GW-3 standards /7/202 Ref.#3004_Tbl_gauging vph Toluene C 9 -C 0 Aromatics

21 APPEIX B Groundwater Laboratory Analytical Data

22 2 3 4 ANALYTICAL REPORT TestAmerica Laboratories, Inc. TestAmerica Nashville 2960 Foster Creighton Drive Nashville, TN Tel: (6) TestAmerica Job ID: TestAmerica SDG: 932 Salem Street, Malden, MA Client Project/Site: 3004 For: Kleinfelder Inc Speen Street Suite 200 Framingham, Massachusetts Attn: Mark Habedank Authorized for release by: 3/3/203 3:0:48 PM Jennifer Huckaba Project Manager I jennifer.huckaba@testamericainc.com The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory.

23 Client: Kleinfelder Inc Project/Site: 3004 Table of Contents TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Cover Page Table of Contents Sample Summary Case Narrative Definitions Client Sample Results QC Sample Results QC Association Chronicle Method Summary Certification Summary Chain of Custody Receipt Checklists Page 2 of 23 TestAmerica Nashville 3/3/203

24 Client: Kleinfelder Inc Project/Site: 3004 Sample Summary TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID Client Sample ID Matrix Collected Received MW- Ground Water 02/26/3 3:30 03/0/3 08: MW-0 Ground Water 02/26/3 2:4 03/0/3 08: MW-202 Ground Water 02/26/3 :00 03/0/3 08: MW-203 Ground Water 02/26/3 :4 03/0/3 08: MW-206 Ground Water 02/26/3 4:30 03/0/3 08: MW-207 Ground Water 02/26/3 : 03/0/3 08: TestAmerica Nashville Page 3 of 23 3/3/203

25 Case Narrative Client: Kleinfelder Inc TestAmerica Job ID: Project/Site: 3004 SDG: 932 Salem Street, Malden, MA Job ID: Laboratory: TestAmerica Nashville Narrative CASE NARRATIVE Client: Kleinfelder Inc Project: 3004 Report Number: With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In some cases, due to interference or analytes present at high concentrations, samples were diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. Calculations are performed before rounding to avoid round-off errors in calculated results. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the individual sections below TestAmerica utilizes USEPA approved methods, where applicable, in all analytical work. The samples presented in this report were analyzed for the parameter(s) listed on the analytical methods summary page in accordance with the method(s) indicated and were analyzed in accordance with Massachusetts Contingency Plan (MCP), where applicable. The following requested analytes, parameter groups or methods analyzed and contained in this report are not certified by the laboratory:a summary of QC data for these analyses is included at the back of the report. TestAmerica Nashville attests to the validity of the laboratory data generated by TestAmerica facilities reported herein. All analyses performed by TestAmerica facilities were done using established laboratory SOPs that incorporate QA/QC procedures described in the applicable methods. TestAmerica's operations groups have reviewed the data for compliance with the laboratory QA/QC plan, and data have been found to be compliant with laboratory protocols unless otherwise noted below. All solid sample results are reported on an "as received" basis unless otherwise indicated by the presence of a % solids value in the method header. This laboratory report is confidential and is intended for the sole use of TestAmerica and its client. RECEIPT The samples were received on 3//203 8:0 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was 2.7º C. MASSACHUSETTS VOLATILE PETROLEUM HYDROCARBONS Samples MW- ( ), MW-0 ( ), MW-202 ( ), MW-203 ( ), MW-206 ( ) and MW-207 ( ) were analyzed for Massachusetts Volatile Petroleum Hydrocarbons in accordance with MADEP. The samples were analyzed on 03/0/203 and 03/06/203. Samples MW- ( )[0X], MW- ( )[0X], MW-0 ( )[0X], MW-0 ( )[0X] and MW-202 ( )[X] required dilution prior to analysis. The reporting limits have been adjusted accordingly. ph is <2 for all these samples on batch # No difficulties were encountered during the MAVPH analyses. All quality control parameters were within the acceptance limits. TestAmerica Nashville Page 4 of 23 3/3/203

26 Case Narrative Client: Kleinfelder Inc TestAmerica Job ID: Project/Site: 3004 SDG: 932 Salem Street, Malden, MA Job ID: (Continued) Laboratory: TestAmerica Nashville (Continued) MASSACHUSETTS VOLATILE PETROLEUM HYDROCARBONS Samples MW- ( ), MW-0 ( ), MW-202 ( ), MW-203 ( ), MW-206 ( ) and MW-207 ( ) were analyzed for Massachusetts Volatile Petroleum Hydrocarbons in accordance with MADEP. The samples were analyzed on 03/08/203. No difficulties were encountered during the MAVPH analyses. All quality control parameters were within the acceptance limits TestAmerica Nashville Page of 23 3/3/203

27 Laboratory Name: Project Location: Project #: RTN: Matrices: X Groundwater/Surface Water Soil/Sediment Drinking Water Air A B C D F G Malden, MA CAM Protocols (check all that apply below): CAM II A 8270 SVOC CAM II B 600 Metals CAM III A E MassDEP Analytical Protocol Certification Form TestAmerica Nashville This form provides certifications for the following data set: list Laboratory Sample ID Number(s)): MW- ( ), MW-0 ( ), MW-202 ( ), MW-203 ( ), MW-206 ( ) and MW- 207 ( ) 8260 VOC 7470/747 Hg Mass DEP VPH 808 Pesticides 796 Hex Cr CAM III B CAM IV A X CAM V B CAM VI B 700 Metals Mass DEP EPH 8 Herbicides 8330 Explosives CAM III C CAM IV B CAM V C CAM VIII A 6020 Metals 8082 PCB 904 Total Cyanide/PAC Perchlorate CAM III D CAM V A CAM VI A CAM VIII B Affirmative Responses to Questions A through F are required for "Presumptive Certainty" status Does the laboratory report comply with all the reporting requirements specified in CAM VII A, "Quality Assurance and Quality Control Guidelines for the Acquisition and Reporting of Analytical Data"? a. VPH, EPH and APH Methods only: Was each method conducted without significant modification(s)? (Refer to the individual method(s) for a list of significant modifications). b. APH and TO- Methods only: Was the complete analyte list reported for each method? Were all applicable CAM protocol QC and performance standard non-conformances identified and evaluated in a laboratory narrative (including all "No" responses to Questions A through E)? X Responses to Questions G, H and I below are required for "Presumptive Certainty" status Were the reporting limits at or below all CAM reporting limits specified in the selected CAM protocol(s)? Were all samples received in a condition consistent with those described on the Chain-of-Custody, properly preserved (including temperature) in the field or laboratory, and prepared/analyzed within method holding time. Were the analytical method(s) and all associated QC requirements specified in the selected CAM protocol(s) followed? Were all required corrective actions and analytical response actions specified in the selected CAM protocol(s) implemented for all identified performance standard non-conformances? Mass DEP APH CAM IX A TO- VOC CAM IX B Data User Note: Data that achieve "Presumptive Certainty" status may not necessarily meet the data usability and representativeness requirements described in 30 CMR (2)(k) and WCS Yes Yes Yes Yes Yes Yes Yes No No No No No No No Yes No H Were all QC performance standards specified in the CAM protocol(s) achieved? X Yes No I Were results reported for the complete analyte list specified in the selected CAM protocol(s)? X Yes No All negative responses must be addressed in an attached laboratory narrative. X X X X X X other: I, the undersigned, attest under the pains and penalties of perjury that, based upon my personal inquiry of those responsible for obtaining the information, the material contained in this analytical report is, to the best of my knowledge and belief, is accurate and complete. Signature: Position: Project Manager Printed Name: Jennifer Huckaba Date: 3/3/203 Page 6 of 23 3/3/203

28 Definitions/Glossary Client: Kleinfelder Inc Project/Site: 3004 Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CNF Contains no Free Liquid DER Duplicate error ratio (normalized absolute difference) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision level concentration MDA Minimum detectable activity EDL Estimated Detection Limit MDC Minimum detectable concentration MDL Method Detection Limit ML Minimum Level (Dioxin) Not detected at the reporting limit (or MDL or EDL if shown) PQL Practical Quantitation Limit QC Quality Control RER Relative error ratio RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA TestAmerica Nashville Page 7 of 23 3/3/203

29 Client: Kleinfelder Inc Project/Site: 3004 Client Sample ID: MW- Date Collected: 02/26/3 3:30 Date Received: 03/0/3 08:0 Client Sample Results Method: MA VPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier C-C8 Aliphatics (adjusted) C9-C2 Aliphatics (adjusted) RL Unit TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID: Matrix: Ground Water Analyzed Dil Fac /08/3 7: 0 60 Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier Methyl tert-butyl ether Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate %Recovery Qualifier 000 RL Unit D 03/08/3 7: Analyzed /0/3 23: Limits D 03/0/3 23:49 03/0/3 23:49 03/0/3 23:49 03/0/3 23:49 03/0/3 23:49 03/0/3 23:49 03/0/3 23:49 03/0/3 23:8 03/0/3 23:49 Analyzed 2,-Dibromotoluene (fid) /0/3 23:8 0 2,-Dibromotoluene (fid) /0/3 23:49 0 2,-Dibromotoluene (pid) /0/3 23: Dil Fac Dil Fac TestAmerica Nashville Page 8 of 23 3/3/203

30 Client: Kleinfelder Inc Project/Site: 3004 Client Sample ID: MW-0 Date Collected: 02/26/3 2:4 Date Received: 03/0/3 08:0 Client Sample Results Method: MA VPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier C-C8 Aliphatics (adjusted) C9-C2 Aliphatics (adjusted) RL Unit TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID: Matrix: Ground Water Analyzed Dil Fac /08/3 7: Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier Methyl tert-butyl ether Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate %Recovery Qualifier 000 RL Unit D 03/08/3 7: Analyzed /06/3 0: Limits D 03/06/3 0:0 03/06/3 0:0 03/06/3 0:0 03/06/3 0:0 03/06/3 0:0 03/06/3 0:0 03/06/3 0:20 03/06/3 0:20 03/06/3 0:0 Analyzed 2,-Dibromotoluene (fid) /06/3 0:20 0 2,-Dibromotoluene (pid) /06/3 0:0 0 0 Dil Fac Dil Fac TestAmerica Nashville Page 9 of 23 3/3/203

31 Client: Kleinfelder Inc Project/Site: 3004 Client Sample ID: MW-202 Date Collected: 02/26/3 :00 Date Received: 03/0/3 08:0 Client Sample Results Method: MA VPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier C-C8 Aliphatics (adjusted) C9-C2 Aliphatics (adjusted) Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier Methyl tert-butyl ether Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate %Recovery Qualifier RL Unit TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID: Matrix: Ground Water Analyzed Dil Fac /08/3 7: RL Unit D 03/08/3 7: Analyzed /0/3 2: Limits D 03/0/3 2:47 03/0/3 2:47 03/0/3 2:47 03/0/3 2:47 03/0/3 2:47 03/0/3 2:47 03/0/3 2:47 03/0/3 2:7 03/0/3 2:7 Analyzed 2,-Dibromotoluene (fid) /0/3 2:7 2,-Dibromotoluene (fid) /0/3 2:47 2,-Dibromotoluene (pid) /0/3 2:7 2,-Dibromotoluene (pid) /0/3 2:47 Dil Fac Dil Fac TestAmerica Nashville Page 0 of 23 3/3/203

32 Client: Kleinfelder Inc Project/Site: 3004 Client Sample ID: MW-203 Date Collected: 02/26/3 :4 Date Received: 03/0/3 08:0 Client Sample Results Method: MA VPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier C-C8 Aliphatics (adjusted) C9-C2 Aliphatics (adjusted) Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier Methyl tert-butyl ether Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate %Recovery Qualifier RL Unit TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID: Matrix: Ground Water Analyzed Dil Fac /08/3 7: RL Unit D 03/08/3 7: Analyzed /0/3 20: Limits D 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 03/0/3 20:6 Analyzed 2,-Dibromotoluene (fid) /0/3 20:6 2,-Dibromotoluene (pid) /0/3 20:6 Dil Fac Dil Fac TestAmerica Nashville Page of 23 3/3/203

33 Client: Kleinfelder Inc Project/Site: 3004 Client Sample ID: MW-206 Date Collected: 02/26/3 4:30 Date Received: 03/0/3 08:0 Client Sample Results Method: MA VPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier C-C8 Aliphatics (adjusted) C9-C2 Aliphatics (adjusted) Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier Methyl tert-butyl ether Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate %Recovery Qualifier RL Unit TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID: Matrix: Ground Water Analyzed Dil Fac /08/3 7: RL Unit D 03/08/3 7: Analyzed /0/3 20: Limits D 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 03/0/3 20:46 Analyzed 2,-Dibromotoluene (fid) /0/3 20:46 2,-Dibromotoluene (pid) /0/3 20:46 Dil Fac Dil Fac TestAmerica Nashville Page 2 of 23 3/3/203

34 Client: Kleinfelder Inc Project/Site: 3004 Client Sample ID: MW-207 Date Collected: 02/26/3 : Date Received: 03/0/3 08:0 Client Sample Results Method: MA VPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier C-C8 Aliphatics (adjusted) C9-C2 Aliphatics (adjusted) Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Analyte Result Qualifier Methyl tert-butyl ether Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate %Recovery Qualifier RL Unit TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Lab Sample ID: Matrix: Ground Water Analyzed Dil Fac /08/3 7: 2 00 RL Unit D 03/08/3 7: Analyzed /0/3 9: Limits D 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 03/0/3 9:46 Analyzed 2,-Dibromotoluene (fid) /0/3 9:46 2,-Dibromotoluene (pid) /0/3 9:46 Dil Fac Dil Fac TestAmerica Nashville Page 3 of 23 3/3/203

35 Client: Kleinfelder Inc Project/Site: 3004 QC Sample Results Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Lab Sample ID: MB /7 Matrix: Water Analysis Batch: Analyte MB Result MB Qualifier RL TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Client Sample ID: Method Blank Prep Type: Total/NA Analyzed Methyl tert-butyl ether /0/3 :3 Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate MB %Recovery MB Qualifier Limits Unit D 03/0/3 :3 03/0/3 :3 03/0/3 :3 03/0/3 :3 03/0/3 :3 03/0/3 :3 03/0/3 :3 03/0/3 :3 03/0/3 :3 Analyzed 2,-Dibromotoluene (fid) /0/3 :3 2,-Dibromotoluene (pid) /0/3 :3 Lab Sample ID: LCS /3 Matrix: Water Analysis Batch: Analyte Spike Added Dil Fac Dil Fac Client Sample ID: Lab Control Sample Prep Type: Total/NA Methyl tert-butyl ether LCS LCS Result Qualifier Unit D %Rec Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene C-C8 Aliphatics (unadjusted) C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics %Rec. Limits Surrogate LCS %Recovery LCS Qualifier Limits 2,-Dibromotoluene (fid) ,-Dibromotoluene (pid) Lab Sample ID: LCSD /4 Matrix: Water Analysis Batch: Analyte Spike Added Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Methyl tert-butyl ether LCSD LCSD Result Qualifier Unit D %Rec Benzene Toluene Ethylbenzene m-xylene & p-xylene o-xylene Naphthalene %Rec. Limits RPD RPD Limit TestAmerica Nashville Page 4 of 23 3/3/203

36 Client: Kleinfelder Inc Project/Site: 3004 QC Sample Results Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) (Continued) Lab Sample ID: LCSD /4 Matrix: Water Analysis Batch: Analyte Spike Added TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA C-C8 Aliphatics (unadjusted) LCSD LCSD Result Qualifier Unit D %Rec C9-C2 Aliphatics (unadjusted) C9-C0 Aromatics Surrogate LCSD %Recovery LCSD Qualifier Limits 2,-Dibromotoluene (fid) ,-Dibromotoluene (pid) %Rec. Limits RPD RPD Limit TestAmerica Nashville Page of 23 3/3/203

37 QC Association Summary Client: Kleinfelder Inc TestAmerica Job ID: Project/Site: 3004 SDG: 932 Salem Street, Malden, MA GC VOA Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MW- Total/NA Ground Water MAVPH MW- Total/NA Ground Water MAVPH MW-0 Total/NA Ground Water MAVPH MW-0 Total/NA Ground Water MAVPH MW-202 Total/NA Ground Water MAVPH MW-202 Total/NA Ground Water MAVPH MW-203 Total/NA Ground Water MAVPH MW-206 Total/NA Ground Water MAVPH MW-207 Total/NA Ground Water MAVPH LCS /3 Lab Control Sample Total/NA Water MAVPH LCSD /4 Lab Control Sample Dup Total/NA Water MAVPH MB /7 Method Blank Total/NA Water MAVPH Analysis Batch: Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MW- Total/NA Ground Water MA VPH MW-0 Total/NA Ground Water MA VPH MW-202 Total/NA Ground Water MA VPH MW-203 Total/NA Ground Water MA VPH MW-206 Total/NA Ground Water MA VPH MW-207 Total/NA Ground Water MA VPH TestAmerica Nashville Page 6 of 23 3/3/203

38 Lab Chronicle Client: Kleinfelder Inc TestAmerica Job ID: Project/Site: 3004 SDG: 932 Salem Street, Malden, MA Client Sample ID: MW- Lab Sample ID: Date Collected: 02/26/3 3:30 Matrix: Ground Water Date Received: 03/0/3 08: Prep Type Total/NA Total/NA Total/NA Batch Type Batch Method Run Dilution Factor Batch Number or Analyzed Analyst Analysis MAVPH /0/3 23:8 FG TAL NSH Analysis MAVPH /0/3 23:49 FG TAL NSH Analysis MA VPH /08/3 7: OD TAL NSH Lab 6 7 Client Sample ID: MW-0 Lab Sample ID: Date Collected: 02/26/3 2:4 Matrix: Ground Water Date Received: 03/0/3 08:0 8 9 Prep Type Total/NA Total/NA Total/NA Batch Type Batch Method Run Dilution Factor Batch Number or Analyzed Analyst Analysis MAVPH /06/3 0:20 FG TAL NSH Analysis MAVPH /06/3 0:0 FG TAL NSH Analysis MA VPH /08/3 7: OD TAL NSH Lab 0 2 Client Sample ID: MW-202 Lab Sample ID: Date Collected: 02/26/3 :00 Matrix: Ground Water Date Received: 03/0/3 08:0 3 Prep Type Total/NA Total/NA Total/NA Batch Type Batch Method Run Dilution Factor Batch Number or Analyzed Analyst Analysis MAVPH /0/3 2:7 FG TAL NSH Analysis MAVPH /0/3 2:47 FG TAL NSH Analysis MA VPH /08/3 7: OD TAL NSH Lab Client Sample ID: MW-203 Lab Sample ID: Date Collected: 02/26/3 :4 Matrix: Ground Water Date Received: 03/0/3 08:0 Prep Type Total/NA Total/NA Batch Type Batch Method Run Dilution Factor Batch Number or Analyzed Analyst Analysis MAVPH /0/3 20:6 FG TAL NSH Analysis MA VPH /08/3 7: OD TAL NSH Lab Client Sample ID: MW-206 Lab Sample ID: Date Collected: 02/26/3 4:30 Matrix: Ground Water Date Received: 03/0/3 08:0 Prep Type Total/NA Total/NA Batch Type Batch Method Run Dilution Factor Batch Number or Analyzed Analyst Analysis MAVPH /0/3 20:46 FG TAL NSH Analysis MA VPH /08/3 7: OD TAL NSH Lab TestAmerica Nashville Page 7 of 23 3/3/203

39 Lab Chronicle Client: Kleinfelder Inc TestAmerica Job ID: Project/Site: 3004 SDG: 932 Salem Street, Malden, MA Client Sample ID: MW-207 Lab Sample ID: Date Collected: 02/26/3 : Matrix: Ground Water Date Received: 03/0/3 08:0 Prep Type Total/NA Total/NA Laboratory References: Batch Type Batch Method Run Dilution Factor Batch Number or Analyzed Analyst Analysis MAVPH /0/3 9:46 FG TAL NSH Analysis MA VPH /08/3 7: OD TAL NSH TAL NSH = TestAmerica Nashville, 2960 Foster Creighton Drive, Nashville, TN 37204, TEL (6) Lab TestAmerica Nashville Page 8 of 23 3/3/203

40 Client: Kleinfelder Inc Project/Site: 3004 Method Summary TestAmerica Job ID: SDG: 932 Salem Street, Malden, MA Method Method Description Protocol Laboratory MA VPH Massachusetts - Volatile Petroleum Hydrocarbons (GC) MA DEP TAL NSH MAVPH Massachusetts - Volatile Petroleum Hydrocarbons (GC) MA DEP TAL NSH Protocol References: MA DEP = Massachusetts Department Of Environmental Protection Laboratory References: TAL NSH = TestAmerica Nashville, 2960 Foster Creighton Drive, Nashville, TN 37204, TEL (6) TestAmerica Nashville Page 9 of 23 3/3/203

41 Certification Summary Client: Kleinfelder Inc TestAmerica Job ID: Project/Site: 3004 SDG: 932 Salem Street, Malden, MA Laboratory: TestAmerica Nashville The certifications listed below are applicable to this report. Authority Program EPA Region Certification ID Expiration Date Massachusetts State Program M-TN TestAmerica Nashville Page 20 of 23 3/3/203

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44 Login Sample Receipt Checklist Client: Kleinfelder Inc Job Number: Login Number: List Number: Creator: Armstrong, Daniel Question Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey meter. The cooler's custody seal, if present, is intact. Sample custody seals, if present, are intact. The cooler or samples do not appear to have been compromised or tampered with. Samples were received on ice. Cooler Temperature is acceptable. Cooler Temperature is recorded. True 2.7C COC is present. COC is filled out in ink and legible. COC is filled out with all pertinent information. Is the Field Sampler's name present on COC? There are no discrepancies between the containers received and the COC. Samples are received within Holding Time. Sample containers have legible labels. Containers are not broken or leaking. Sample collection date/times are provided. Appropriate sample containers are used. Sample bottles are completely filled. Sample Preservation Verified. There is sufficient vol. for all requested analyses, incl. any requested MS/MSDs Containers requiring zero headspace have no headspace or bubble is <6mm (/4"). Multiphasic samples are not present. Samples do not require splitting or compositing. Residual Chlorine Checked. True True N/A True True True True True True True True True True True True True True N/A True True True True N/A SDG Number: 932 Salem Street, Malden, MA List Source: TestAmerica Nashville TestAmerica Nashville Page 23 of 23 3/3/203

45 APPEIX C Public Notification Letters

46 March 2, 203 Mr. Chris Nikolopoulos 932 Salem Street Malden, MA 0248 Re: Monitoring Data Collected at 932 Salem Street Malden, MA 0248 RTN Dear Mr. Nikolopoulos: Kleinfelder is conducting environmental investigation activities on behalf of ExxonMobil Environmental Services Company (EMES) in accordance with 30 CMR at the Former Mobil Facility No property at 932 Salem Street, Malden, Massachusetts. In accordance with Site Access granted in previous correspondence, Kleinfelder completed a groundwater monitoring event on February 26, 203 at the above referenced location. On February 26, 203, Kleinfelder personnel gauged depth to water and collected a groundwater sample from monitoring well MW-, (see attached site plan for location). The results of this monitoring event are enclosed. Additional information pertaining to this sampling event is included on BWSC Form 23. EMES is scheduled to complete monitoring activities on a quarterly basis. The next monitoring event is scheduled for May 203. The results of this monitoring event will be forwarded to you within 30 days of receipt of the laboratory results. Thank you for your continued cooperation. Should you have any questions regarding this matter, please do not hesitate to contact me at Sincerely, KLEINFELDER Jeremy Blumberg, CHMM Project Geologist Enclosures CC: EMES (file) 2230/FRM3L0233_3004/Sampling Results 03-3 Speen Street, Suite 200, Framingham, MA 070 p f

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48 March 2, 203 Mr. Robert P. Knox Jr. Director of Public Works Malden Department of Public Works 36 Commercial Street Malden, MA 0248 Re: Monitoring Data Collected at Right-of-Way (Sidewalk) Malden, MA 0248 RTN Dear Mr. Knox: Kleinfelder is conducting environmental investigation activities on behalf of ExxonMobil Environmental Services Company (EMES) in accordance with 30 CMR at the Former Mobil Facility No property at 932 Salem Street, Malden, Massachusetts. In accordance with Site Access granted in previous correspondence, Kleinfelder completed a groundwater monitoring event on February 26, 203 at the above referenced location. On February 26, 203, Kleinfelder personnel gauged depth to water and collected groundwater samples from monitoring wells MW-0, MW-202, MW-203, MW-206, and MW-207, (see attached site plan for locations). The results of this monitoring event are enclosed. Additional information pertaining to this sampling event is included on BWSC Form 23. EMES is scheduled to complete monitoring activities on a quarterly basis. The next monitoring event is scheduled for May 203. The results of this monitoring event will be forwarded to you within 30 days of receipt of the laboratory results. Thank you for your continued cooperation. Should you have any questions regarding this matter, please do not hesitate to contact me at Sincerely, KLEINFELDER Jeremy Blumberg, CHMM Project Geologist Enclosures CC: EMES (file) 2230/FRM3L0233_3004/Sampling Results 03-3 Speen Street, Suite 200, Framingham, MA 070 p f

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