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Date July 3, 2003 <br /> USA GASOLINE QUARTERLY GROUNDWATER MONITORING REPORT <br /> Faciiity No: 65 Address: 2500 West Lodi Avenue, Lodi, California <br /> USA Gasoline Project Supervisor: Charles Miller <br /> Consulting Ca./Contact Person: Stratus Environmental, Incl 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 11356 <br /> WORK PERFORMED THIS QUARTER (Second 2003): <br /> 1. Stratus measured groundwater elevations and collected groundwater samples from wells MW-1 <br /> through MW-4, MW-6 through MW-10, S-1, and S-2 on April 10, 2003. <br /> 2. Stratus compiled and evaluated groundwater monitoring data. <br /> 3. Stratus received an Authority to Construct (ATC) (#N-4887-1-0 dated April 22, 2003) from the San <br /> Joaquin Valley Unified Air Pollution Control District (SJVUACD) to abate and discharge soil vapors <br /> using activated carbon. <br /> 4. Stratus redeveloped wells (S-1, S-2, and MW-8) used in the remediation of the site. <br /> WORK PROPOSED FOR NEXT QUARTER (Third 2003): <br /> 1. The next sampling event is tentatively scheduled for July 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 SW8015B/DHS LUFT Manual, and for benzene, <br /> toluene, ethylbenzene, total xylenes (BTEX), methyl tert-butyl ether (MTBE), tertiary amyl methyl <br /> ether (TAME), ethyl tertiary butyl ether (ETBE), di-isopropyl ether (DIPE), and tertiary butyl alcohol <br /> (TBA) by EPA Method SW8260B. <br /> 3. Stratus will initiate assessment activities to characterize the vertical extent of impact to ground <br /> water. <br /> 4. Stratus will initiate installation of activated carbon abatement system. <br /> Current Phase of Project: Remediation <br /> Frequency of Groundwater Sampling: All Wells = Quarterly <br /> Frequency of Groundwater Monitoring: Quarterly <br /> Groundwater Sampling Date: April 10, 2003 <br /> Is Free Product(FP) Present on Site: No <br /> FP Recovered This Quarter: No <br /> Cumulative FP Recovered to Date: NA <br /> Approximate Depth to Groundwater: 41.63 to 43.67 feet below top of well casing <br /> PAUSA Gasoline100651Qtr1y120031USA_65_2Q03.DOC 5TKA TU5 <br />