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ENV RONMENrAL INC 3330 Cameron Park Drive Ste 550 <br /> 7 i Cameron Park California 95682 <br /> Fy i1 3 6 (530)676-6004--Fax (530)676-6005 <br /> February 5, 2001 <br /> Project No 2002-1426-01 <br /> Mr Travis Bryant <br /> Interstate Brands Corporation <br /> 12 East Armour Boulevard <br /> Kansas City, MO 64111 <br /> RE Fourth Quarter 2000 Groundwater Monitoring Report for the Former Dolly <br /> Madison Facility located at 1426 South Lincoln Street, Stockton, California <br /> Dear Mr Bryant <br /> Stratus Environmental, Inc (Stratus) has prepared this fourth quarter 2000 groundwater <br /> monitoring report on behalf of Interstate Brands Corporation (IBC) for the former Dolly <br /> Madison facility located at 1426 South Lincoln Street, Stockton, California (Figure 1) <br /> This report presents groundwater elevations measured in the two onsite groundwater <br /> monitoring wells and analytical results of groundwater samples collected from the wells <br /> BACKGROUND <br /> The site is located approximately 200 feet south of the intersection of Charter Way and <br /> South Lincoln Street in Stockton, California On July 29, 1988, SEMCO of Modesto, <br /> California observed the removal of a 1,000-gallon underground storage tank (UST) <br /> Based on analytical results of soil samples collected from beneath the former UST, <br /> residual hydrocarbons were present Total petroleum hydrocarbons as gasoline (TPHG) <br /> were detected at a concentration of 95 parts per million (ppm) Benzene, total petroleum <br /> hydrocarbons as diesel, kerosene, and motor oil were not detected The approximate <br /> location of the former UST relative to site structures is shown on Figure 2 <br /> In February 1997, EMCON drilled three soil borings onsite Soil boring B-1 was <br /> converted to vapor extraction well VW-1, and borings B-2 and B-3 were converted to <br /> groundwater monitoring wells MW-1 and MW-2, respectively Based on analytical data <br /> collected from the soil borings, soil beneath the site was impacted by petroleum <br /> hydrocarbons The highest concentration was detected in soil boring B-1, which was <br /> located beneath the former UST Residual petroleum hydrocarbons were not detected in <br /> the vadose zone (0-21 feet below ground surface [bgs]), but were detected in the <br /> saturated zone Analytical results of groundwater indicated dissolved hydrocarbons were <br /> detected in samples collected from wells MW-1 and MW-2 (EMCON, August 4, 1997) <br />. TPHG was detected in the samples collected from wells MW-1 and MW-2 at <br /> concentrations of 18,000 parts per billion (ppb) and 220 ppb, respectively Benzene was <br />