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yM, _ DRAFT REMEDIAL WORK FLAN APACHE PLASTICS L.P. 2050 E. FREMONT ST. STOCKTON, CALIFORNIA 1.0 LITE BACICGROUNI] Apache Plastics, LP. (AP) is located at 2050 E. Fremont St. in Stockton, California (Figure 1, Vicinity Map). Apache Plastics has manufactured extruded plastic pipe at this facility since 1969. Previously,the facility was a furniture warehouse. The facility is located in a mixed commercial district and is bounded on the east by Port Stockton Food Distributors,Inc.:on the west by Kelvard Refrigeration and Appliance Co.,on the south by an auto parts distributor,and on the north,across E.Fremont St.,by a car wash facility and the Stockton City Taxi Cab Co. (Figure 2,:Site Map). 2.0Rp QJECF THIS'I ORY AND INVE TI A a JQN RUjILTS The following information is summarized from two Western Geologic Resources, Inc. (` IGR) "Subsurface Investigation" reports dated November 1989 and August 1990. ' In August 1988,one 1000-gallon underground gasoline storage tank was removed from the north side of the AP building by Precision Industries of Stockton,California. A soil sample :a collected from the native soil beneath the tank backfill material at the time of tank removal l contained 3400 parts per million (ppm)Total Petroleum Hydrocarbons asgasoline(TPHs), and 61 ppm,290 ppm,610 ppm,and 65 ppm,of benzene,toluene,xylene and ethylbenzene, respectively. im In August and September 1989, WGR conducted a subsurface investigation of soil and groundwater at the.site. Four soil borings, B-1 through B-4 were drilled and completed as groundwater monitor wells,MW-1 through MW-4(Figure 3). During drilling,groundwater °ni. was encountered at approximately 63 feet below grade. Soil boring samples were collected I at five foot intervals. Hydrocarbon odors were noted to be present in B-1 soil samples i collected at depths between 20 feet and 65 feet. Subsequently, B-2, B-3, and B-4 samples i were screened with..a photolonization detector(PID)and volatile organic compound(VOC) concentrations ranging up to 70 ppm were detected in soil samples collected from B-3 at depths between 40 feet and 60 feet,and from B-4 at depths between four feet and 60 feet. No detectable VOCs were reported for B-2 samples. Selected soil samples were analyzed far TPH and aromatic hydrocarbons. Table IA, included in Appendix A,summarizes the - results of 13=1 through B-4 soil analyses... _ REMEDIATION SERVICES, INC.