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California Regional Water Quality <br /> Control Board �'-� ''.. <br /> Central Valley Region <br /> — �\ <br /> � V E rY . <br /> Alan C.Lloyd,Ph.D. Robert Schneider,Chair R�'C `'° <br /> Arnold <br /> Agency Secretary Sacramento Main OfficeSchwarzenegger <br /> 11020 Sun Center Drive#2O0,Rancho Cordova,California 956',11}'51114 — 5 �0D5 Governor <br /> Phone(916)464.3291•FAX(916)464-4645 <br /> http:/www.waterboards.mgov/centralvalley ENVIRONMENT HEALTH <br /> 1 December 2005 <br /> PERMITISERVICES <br /> Mr. James Fisk <br /> J&L Market <br /> 8125 EI Dorado Street <br /> French Camp, CA 95231 <br /> REPORT REVIEW, J&L MARKET, 8125 S. EL DORADO ST., FRENCH CAMP, <br /> SAN JOAQUIN COUNTY <br /> I reviewed the 7 November 2005 letter Subsurface Investigation Report(Report)submitted by your consultant <br /> ATC Associates,Inc. (ATC). The Report documents the installation of four shallow monitoring wells(JLM16 <br /> through JLM19)and three Cone Penetration Testing(CPTI through CPT3)borings/grab groundwater samples, <br /> and the 30 August 2005 Third Quarter 2005 groundwater monitoring event(3Q2005). The Figure 5 Groundwater <br /> Contour Map(enclosed) shows a radial flow pattern towards JLM-3. Historically reports show that the direction <br /> of groundwater flow is towards the southeast with a gradient ranging from 0.001 to 0.005 feet/feet. There are no <br /> known pumping wells or other conduits (drywells, etc.)onsite to account for the radial flow pattern. Maximum <br /> 3Q2005 groundwater concentrations were: total petroleum hydrocarbons as gasoline(1,100 gg/L),benzene <br /> (23 µg/L), MtBE(4.6 µg/L),and 1,2-dichloroethane(1,2-DCA; 350 µg/L). CMTI and CMT3 grab groundwater <br /> sample analyses reported 1,2-DCA at 6.1 gg/L(130 feet below ground surface, or bgs)and 18 (87 feet bgs), <br /> respectively. The Report does not make recommendations. <br /> Comments: <br /> 1) It is unusual for an investigative report to not make recommendations, especially when petroleum <br /> hydrocarbons pollution is found at over three times the current depth of the monitoring well network. By <br /> 16 January 2006,please submit a Workplan for monitoring wells at CPTI and CPT3 to confirm the grab <br /> groundwater sample results at 87 feet bgs and 130 feet bgs. Also investigate.groundwater in the <br /> permeable sand/gravel intervals, between 40 and 50 feet bgs, and between 60 and 65 feet,per the CPT <br /> investigation. <br /> 2) There appear to be depth to water(DTW)discrepancies(transposed numbers)between the Report's <br /> Groundwater Sampling Forms(GSF)and Table 1 for JLM15 and JLM19. The Report uses values from <br /> Table 1 to calculate groundwater elevations and Table 1 states in the column Groundwater Flow <br /> Direction that it is"variable". In future reports,provide a discussion in the text if there are issues with <br /> the sampling protocol or field data, and recommendations to resolve,or conclusions why the radial flow <br /> pattern exists. <br /> California Environmental Protection Agency <br /> Co Recycled Paper <br />