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� r <br /> Date ( J jannuaryl27�,, 2_006 <br /> L�tE�L�111 ,/ E0 <br /> PALISADES GAS AND WASH STATION NO 835 16N 3 1 2006 <br /> QUARTERLY GROUNDWATER MONITORING REPORT <br /> ENVIRONMENT HEALTH <br /> Facility No 835 Address 2705 Country Club Boulevard, Stockton, California PEWAIT/SERVICES <br /> Palisades Gas Project Supervisor Charles Miller <br /> Consulting Co/Contact Person Stratus Environmental, Inc 1 Gown S Kowtha, P E <br /> Consultant Project No 2007-0835-01 <br /> Primary Agency/Regulatory ID No Michael J Infurna, Jr , San Joaquin County Environmental Health <br /> Department/ Site No 1072, RO No 1504 <br /> WORK PERFORMED THIS QUARTER(Fourth 2005) <br /> 1 Stratus monitored groundwater elevations and collected groundwater samples from wells MW-1 <br /> through MW-10, VEW-1, and VEW-3 on December 22, 2005 <br /> 2 Stratus compiled and evaluated groundwater monitoring data <br /> 3 Stratus prepared and submitted a Site Conceptual Mode! and Subsurface Investigation Report on <br /> January 9, 2006 <br /> WORK PROPOSED FOR NEXT QUARTER (First 2006) <br /> • 1 The next sampling event is tentatively scheduled for March 2006 <br /> 2 Groundwater samples will be collected for laboratory analysis from wells MW-1 through MW-10, <br /> VEW-1, and VEW-3 Groundwater samples will be analyzed at a state-certified analytical laboratory <br /> for total petroleum hydrocarbons as diesel (TPHD) and as gasoline (TPHG) by EPA Method <br /> SW8015BIDHS LUFT Manual, and for benzene, toluene, ethylbenzene, total xylenes (BTEX), methyl <br /> tertiary butyl ether (MTBE), tertiary amyl methyl ether (TAME), ethyl tertiary butyl ether (ETRE), <br /> di-isopropyl ether (DIPE), tertiary butyl alcohol (TBA), 1,2-dichloroethane (1,2-DCA), methanol, and <br /> ethanol by EPA Method SW8260B <br /> 3 Upon approval of SCM, Stratus will prepare and submit a work plan for additional assessment <br /> Current Phase of Project Monitoring _ <br /> Frequency of Groundwater Sampling _ All Wells= Quarterly _ <br /> Frequency of Groundwater Monitoring Quarter) <br /> Groundwater Sampling Date December 22, 2005 <br /> Is Free Product(FP) Present on Site NA <br /> Approximate Depth to Groundwater 6 02 to 8 48 feet below top of well casing <br /> Groundwater Flow Direction Northeast <br /> Groundwater Gradient 0 0020 ft/ft <br /> • <br /> K\USA Gasoline\0835\Quarterly\2005\USA_835_4Q05 DOC 5TKATU5 <br />