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Date January 27, 2006_ <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 1 1356 <br /> WORK PERFORMED THIS QUARTER (Fourth 2005): <br /> 1. Stratus measured groundwater elevations and collected groundwater samples from wells MW-1 <br /> through MW-4, MW-6 through MW-10, and S-2 on October 20, 2005. Well S-1 was dry. <br /> 2. Stratus visited the site seven times to operate the SVE system in pulse mode, conduct maintenance <br /> if warranted, and to collect compliance verification discharge samples. <br /> 3. Stratus prepared and submitted a Site Conceptual Mode!(SCM) report (dated December 27, 2005). <br /> 4. Stratus compiled and evaluated groundwater monitoring data. <br /> WORK PROPOSED FOR NEXT QUARTER (First 2006): <br /> . 1. The next sampling event is tentatively scheduled for January 2006. Groundwater samples will be <br /> collected for laboratory analysis from wells MWA through MW-4, MW-6 through MW-10, S-1, and S-2. <br /> 2. Groundwater samples will be analyzed at a state-certified analytical laboratory for total petroleum <br /> hydrocarbons as gasoline (TPHG) by EPA Method SW8015BIDHS LUFT 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 SW82601B. <br /> 3. Stratus will continue to operate the SVE system in pulse mode. <br /> 4. Stratus will visit the site twice each month to perform routine system operation and maintenance and to <br /> collect compliance samples. <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: October 20, 2005 <br /> Is Free Product(FP) Present on Site: No <br /> FP Recovered This Quarter: NA <br /> Cumulative FP Recovered to Date: NA <br /> Approximate Depth to Groundwater: 44.85 to 47.29 feet below top of well casing <br /> • Groundwater Flow Direction: South-southeast <br /> KAUSA Gasoline100651Qtrly120051USA_65_4Q05.DOC STRATU5 <br /> w <br />