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0 0 L&M OPERABLE UNIT-FIRST QUARTER 2014 SITE STATUS, REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT Attachment 2 Page 4 From March 10 through April 9, 2003, 12 shallow zone groundwater monitoring wells (MW-18 through MW-23, MW-25, MW-28, MW-30, MW-31, MW-33, and MW- 34), eight deep zone groundwater monitoring wells (MW-16, MW-17, MW-24, MW-26, MW-27, MW-29, MW-32, and MW-35) were installed, and seven soil borings (SB-1 through SB-6 and MW-16A) were advanced at the Site. Results are summarized in SECOR's report entitled Additional Assessment Report, dated May 30, 2003. From October through December 2003, five additional DPE wells (DPE-8 through DPE-12) were installed and a DPE remediation system was installed at the Site. The DPE system is connected to wells DPE-1 through DPE-12. Additionally, a Non- aqueous Extraction Technique (NETT^^) SPH removal system was installed at well 2AMW-14. System installation activities are summarized in SECOR's report entitled DPE Well and System Installation Report, dated December 5, 2003. On December 17, 18, and 22, 2003, exploratory excavations were conducted at the Site to locate underground utilities including former product pipelines. Steel pipelines were discovered at the Site at 14 locations. Results are summarized in SECOR's report entitled Revised Underground Utility Search Report, dated March 5, 2004. In January 2004, SECOR completed construction of the DPE system. Electrical power and natural gas service were established by Pacific Gas and Electric (PG&E) on March 4, 2004. Under the conditions of the initial air permit for the DPE system issued by the San Joaquin Valley Air Pollution Control District (SJVAPCD) in April 2003, which covered the first six months of system operation utilizing propane as a fuel source, startup of the DPE system was performed and initial groundwater and air influent and effluent samples were collected on March 18, 2004. SECOR submitted a request to the SJVAPCD for modifying the existing air permit, which included the operation of the DPE system using natural gas rather than propane, and extension of the life of the permit. SJVAPCD required that the revised permit be resubmitted for public review over a 30 day period, which ended on July 15, 2004. Throughout the duration of the review period, the SJVAPCD did not authorize the operation of the DPE system under the existing permit due to minor detections of polyaromatic hydrocarbons (PAHs) in the effluent sample collected on March 22, 2004. Since no public comments were received by July 15, 2004, the SJVAPCD issued the revised air permit on July 20, 2004. Initial start-up and shake-down of the DPE system was performed on August 2 and 3, 2004. Stantec