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Date July 27, 2004 <br /> 114we 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 11356 <br /> WORK PERFORMED THIS QUARTER(Second 2004): <br /> 1. Stratus measured groundwater elevations and collected groundwater samples from wells MW-1 <br /> through MW-4, MW-6 through MWA0, and S-2 on April 6, 2004. Well S-1 was dry. <br /> 2. Stratus compiled and evaluated groundwater monitoring data. <br /> 3. The SVE did not operate during the second quarter 2004. <br /> WORK PROPOSED FOR NEXT QUARTER(Third 2004): <br /> 1. The next sampling event is tentatively scheduled for July 2004. Groundwater samples will be <br /> collected for laboratory analysis from wells MWA through MW-4, MW-6 through MW-10, S-1, and <br /> S-2. <br /> y 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 LOFT Manual, and for benzene, <br /> toluene, ethylbenzene, total xylenes (BTEX), methyl tertiary butyl ether (MTBE), tertiary amyl methyl <br /> ether(TAME), ethyl tertiary butyl ether(ETRE), di-isopropyl ether(DIPE), tertiary butyl alcohol (TBA), <br /> methanol, and ethanol by EPA Method SW8260B. <br /> 3. Stratus proposes to reinstall a new 100 cfm catalytic oxidizer to extract and abate residual petroleum <br /> hydrocarbons in the vadose zone. <br /> 4. Stratus will prepare and submit an application for authority to construct to San Joaquin Valley Air <br /> Pollution Control District(SJVAPCD) prior to the installation of the new SVE system. <br /> Current Phase of Project: _ Remediation/Monitoring <br /> Frequency of Groundwater Sampling: All Wells=Quarterly <br /> Frequency of Groundwater Monitoring: Quarterly <br /> Groundwater Sampling Date: _ April 6, 2004 <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: 43.63 to 46.35 feet below top of well casing <br /> Groundwater Flow Direction: Southeast <br /> Groundwater Gradient: 0.005 ft/ft <br /> PAUSA Gasoline100651Qtrly12004IUSA_65_2Q04.DOC STRATUS <br />