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Revised Remedial Action Plan <br /> McBillin Real Estate Investment Property <br /> 2154 South El Dorado Street,Stockton,California <br /> Page 2 <br /> survey within 1,000 feet of the Site, assess vapor intrusion risk to indoor air along the east near <br /> residential housing and evaluate groundwater remedial technologies. <br /> April 20, 2018 — CVRWQCB requested AGE to prepare a workplan proposing to install <br /> recommended soil vapor extraction (SVE) and air sparging(AS) wells and provide details of the <br /> proposed SVE/AS system. <br /> September 13, 2018 — In a letter, the CVRWQCB concurred with a Revision to Pilot Test Work <br /> Plan, submitted by AGE. <br /> May 23, 2019—AGE submitted their Remediation Well Installation Report to the CVRWQCB. <br /> August 2019—Apex was retained as the environmental consultant for the Site. <br /> November 7, 2019—Apex conducted all eight-hour SVE/AS pilot test at the Site. <br /> December 12 through 18, 2019 — Apex conducted the second semi-annual 2019 groundwater <br /> monitoring event and groundwater batch extraction from MW-6 and IAS-1 as part of the SVE/AS <br /> pilot test contingency plan. <br /> March 20, 2020 — In a letter, the CVRWQCB requested a Pilot Test Report detailing the <br /> completion of the Pilot test and findings. <br /> May 21, 2020 —Apex submitted a Second Send-Annual 2019 Groundwater Monitoring Report, <br /> and Pilot Test Results Report in response to the CVRWQCB letter, dated March 20,2020. <br /> June 12,2020—In a letter,the CVRWQCB requested a DPE Pilot Test Work Plan by August 14, <br /> 2020. <br /> August 12,2020—Apex submitted a Dual-Phase Extraction Pilot Test TVork Plan as requested in <br /> the June 12, 2020, letter by the CVRWQCB. <br /> September 11,2020—In a letter,the CVRWQCB requested a DPE Pilot Test Report detailing the <br /> completion and conclusions of the pilot test by December 11, 2020. <br /> December 11,2020—Apex requested to extend the deadline for the DPE Pilot Test Report, <br /> December 16, 2020 — In an email, the CVRWQCB granted a deadline extension to March 31, <br /> 2020. <br /> April 16, 2021 —Apex submitted a Dual-Phase Extraction Pilot Teat Results Report_ <br /> July 7,2021 —In a letter,the CVRWQCB requested a Remedial Action Plan(RAP) by September <br /> 17, 2021. <br /> November 10,2021 —Apex submitted a Remedial Action Plan. <br />