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7 <br /> • <br /> f5 <br /> QUARTERLY REPORT 'S <br /> w� <br /> 1y° <br /> NNE - SEPTEMBER 1990 ���� �� <br /> PVT <br /> �j � j�E-4 C Ti <br /> EXXON RETAIL SITE RS 7-1050 o <br /> 909 Hammer Lane <br /> Stockton, California <br /> EA PROJECT#• 1025614 <br /> WORK PERFORMED <br /> Monitored depths to groundwater and sampled groundwater on 19 September 1990 <br /> Installed three deep monitoring wells to replace MW3, MW4, and MW5 on 28-30 August 1990 <br /> Piping was removed, and closure samples were collected by Applied Geosystems <br /> ANALYTICAL.RESULTS <br /> Total <br /> Well Depth Ethyl- Petroleum <br /> Number Date (feet) Benzene Toluene benzene Xylenes Hydrocarbons <br /> Concentrations in soils (mg/kg) <br /> MW6 08/30/90 46 <0 005 <0 005 <0 005 <0 005 <1 0 <br /> MW6 08/30/90 51 <0 005 <0 005 <0 005 <0 005 <1.0 <br /> MW6 08/30/'90 56 <0 005 <0 005 <0 005 <0 005 <1 0 <br /> MW6 08/30/90 61 <0 005 <0 005 <0 005 <0 005 <1 0 <br /> MW7 08/29/90 26 <0 005 <0 005 <0 005 <0 005 <1 0 <br /> MW7 08/29/90 51 <0 005 <br /> MW7 08/29/90 61 <0 005 <0 005 <0 005 <0 005 <1 0 <br /> MW8 08/28/90 21 <0 005 <0 005 <0 005 <0 005 <1 0 <br /> mwg 0s/28/90 36 <0 005 <0 005 <0.005 <0 005 <1 0 <br /> MW8 08/28/90 60.5 <0 005 <0 005 <0 005 <0 005 <1 0 <br />