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Date October 31, 2003 <br /> USA GASOLINE QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No: 65 Address: 2500 West Lodi Avenue, Lodi, California <br /> USA Gasoline Project Supervisor: Charles Miller <br /> Consulting Co./Contact Person: Stratus Environmental, Inc./Gowri S. Kowtha, P.E. <br /> Consultant Project No: 2007-0065-01 <br /> Primary Agency/Regulatory ID No: Mr. Harlin Knoll, San Joaquin County Public Health Services/1356 <br /> WORK PERFORMED THIS QUARTER(Third 2003): <br /> 1. Stratus measured groundwater elevations and collected groundwater samples from wells MW-1 <br /> through MW-4, and MW-6 through MW-8 on July 28, 2003. Wells S-1, and S-2 were dry. Wells <br /> MW-9 and MW-10 went dry during purging and could not be sampled. <br /> 2. Stratus compiled and evaluated groundwater monitoring data. <br /> 3. Upon receipt of Authority to Construct (ATC) (#N-4887-1-0 dated April 22, 2003) from the San <br /> Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) to abate and discharge soil vapors <br /> using activated carbon, Stratus initiated source test on August 1,2003. <br /> 4. Stratus redeveloped wells S-1, S-2, and MW-8, which are connected to the remediation equipment. <br /> 5. The SVE system was shutdown on August 18, 2003, due to low destruction efficiencies not meeting <br /> the SJVUAPCD requirements. <br /> WORK PROPOSED FOR NEXT QUARTER(Fourth 2003): <br /> I <br /> 1. The next sampling event is tentatively scheduled for October 2003. Groundwater samples will be <br /> collected for laboratory analysis from wells S-1, S-2, MW-1 through MW-4, and MW-6 through <br /> MW-10. <br /> 2. Groundwater samples will be analyzed at a state-certified analytical laboratory for total petroleum <br /> hydrocarbons as gasoline (TPHG) by EPA Method SW80158/DHS LUFT Manual, and for benzene, <br /> toluene, ethylbenzene, total xylenes (BTEX), methyl tart-butyl ether (MTBE), tertiary amyl methyl <br /> ether (TAME), ethyl tertiary butyl ether (ETRE), di-isopropyl ether (DIPE), and tertiary butyl alcohol <br /> (TBA) by EPA Method SW8260B. <br /> 3. Upon receipt of the required access agreement, Stratus will initiate assessment activities to <br /> characterize the vertical extent of impact to ground water. <br /> 4. Stratus will co-ordinate for change-out of carbon and re-start the SVE system. <br /> Current Phase of Project: Remediation <br /> Frequency of Groundwater Sam lin All Wells=QuarterE --- <br /> Frequency of Groundwater Monitoring: Quarterly <br /> Groundwater Sampling Date: July 28,2003 <br /> Is Free Product(FP) Present on Site: No <br /> PAUSAGasolinc%00651Qtrly120031USA_65_3Q03.DOC .5 MA 7115 <br />