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i <br /> --V <br /> rK, <br /> �r �err w��-V� <br /> Working to Restore Nature <br /> benzene was detected at concentrations ranging from 015 ppm to 16 ppm TPHg and <br /> BTEX were not detected in soil samples from the Hydropunch locations Soil results are <br /> shown in Table 1 <br /> Results of analyses of groundwater samples collected from the borings indicated <br /> concentrations of TPHg and BTEX were not detected above laboratory detection limits <br /> These results are shown on Table 2 <br /> SUMMARY AND RECOMMENDATIONS <br /> Residual gasoline hydrocarbons were detected in soil from borings drilled near the tank <br /> complex (B-1, B-2, and B-3) but were not detected in the other onsite or offsite borings <br /> Dissolved gasoline hydrocarbons were not detected in groundwater from onsite or offsite <br /> borings. <br /> 1 Based on results of this and previous work, we recommend that Rutz Grocery install four <br /> groundwater monitoring wells at locations described in Work Plan No 123020-1W <br /> (September 15, 1993) to verify the limits of hydrocarbons in groundwater beneath and near <br /> the site We further recommend that groundwater be monitored quarterly through <br /> completion of onsite remediation of soil affected by hydrocarbons <br /> lI ! <br /> WORK EN PROGRESS <br /> On December 30, 1993, RESNA collected groundwater samples from the three onsite <br /> monitoring wells Results of the sampling event will be reported in the first quarter 1994 <br /> groundwater monitoring report <br /> We understand that Rutz Grocery is trying to obtain funding from the State of California <br /> for insurance bonds required by San Joaquin County Public Works Department to install <br /> offsite monitoring wells After funding has been obtained, Ruiz Grocery will install one <br /> onsite and three offsite monitoring wells in an effort to establish the limit of dissolved <br /> 0 hydrocarbons in groundwater and to monitor groundwater upgradtent and lateral of known <br /> hydrocarbons in soil Once the extent of hydrocarbons have been assessed, RESNA will <br /> prepare a Problem Assessment Report (PAR) and begin activities leading to site <br /> remediation <br /> DOCUMENT DISTRIBUTION <br /> We recommend that a copy of this letter report be forwarded to Ms Mary Meays, San <br /> Joaquin Public Health Services, 445 North San Joaquin, Stockton, California 95202 and Ms <br /> 1215brnn/12M20 01 3 <br />