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M <br /> EXXON,4444 PERSHING -4- 12 November 1996 <br /> STOCKTON,SAN JOAQUIN COUNTY . <br /> RECOMMENDATIONS <br /> 1 To define the lateral extent of contamination, install an additional monitoring well northwest of the <br /> source area across Rosemarie Lane <br /> 2 Request clanficatlon on the location of the screened sections of the UVB well in relation to the <br /> subsurface llthology <br /> 3 Request clarification on the reason for installing the UVB monitoring wells a foot from the WB <br /> well <br /> 4 Request clarification on the effect on the plume downgradlent of the circulation zone, <br /> a Impacted by aeration9 <br /> b Any increase in flow rate which would increase the downgradient movement of the plume? <br /> 5 Request submittal of a Report of Waste Discharge for individual WDRs due to the lack of <br /> hydraulic control, discharge of hydrocarbons above the discharge limits of the General WDRs, and <br /> proposal to discharge nitrogen and phosphorus if subsurface conditions limit bacterial growth <br /> i <br /> i <br /> • <br /> I <br />