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/>0Q:= GEOMAWIM plastic end caps,and tape. Soil samples were labeled,sealed in plastic bags,and stored in an ice- cooled chest Grab groundwater samples were collected from borings GMX-25,GMX-27,GMX-29 through GMX-31, and GMX-33. To collect grab groundwater samples from the borings,a temporary well was constructed of 1-inch diameter Schedule 40 polyvinyl chloride(PVC)piping consisting of blank casing and a 5-foot-long slotted well screen with 0.01-inch slots. The PVC well screen and blank- casing were lowered into the drive casing and the drive casing then was retracted three to four feet from the bottom of the boring to expose the water-bearing material while maintaining a surface seal. A small-diameter baler was then lowered into the PVC piping and groundwater was decanted from the bailer into laboratory-supplied sample containers. Sample containers were labeled,sealed in plastic bags,and stored in an ice-cooled chest. The soil and grab groundwater samples were submitted to Friedman and Bruya,Inc.,of Seattle, Washington,a Califomia-certified analytical laboratory,under Geomamx chamof-custody procedures. Soil samples were submitted for analysis for TPHc(Go-Cm carbon range)using EPA Method 8015 Modified;PAHs using EPA Method 8270 SIM;and BTEX using EPA Method 8020. Grab groundwater samples were analyzed for TPHg (C6 to C12 carbon range)and TPHd(CIO to C24 carbon range)using EPA Method 8015 Modified;BTEX using EPA Method 8021B;and PAHs using EPA Method 8270 SIM. TPHd analyses were performed both with and without a silica gel preparation procedure to assess the presence of polar biodegradation byproducts in the groundwater samples. An aliquot of the sample from GMX-29(located within affected soil)was filtered by the laboratory with a 0.7-micron glass fiber filter prior to extraction and analysis to assess the presence of non-dissolved constituents adhered to particulates in the sample. Because the sample was collected within affected soil and it contained significant particulates,such interference from non-dissolved constituents was expected. Following collection of the soil and grab groundwater samples,the boreholes were backfilled with cement grout placed from the total depth of the boring to ground surface with a treme pipe. 5.0 ANALYTICAL RESULTS Soil sample analytical results are summarized in Table 3 and are presented on Figure 2. No TPHc,BTEX,or PAHs were detected in soil samples from GMX-25,GMX-27,GMX-30, GMX-31,or GMX-33. TPHc was detected in soil samples collected from GMX-26 and GMX-32 at concentrations of 120 and 1,700 mg/kg,respectively. BTEX were not detected in either of these \\SF3\DEPTDATA\D0C SAFE\6000SNW7.003\P0ME0S0IL6W RPTNOV00 .DOC 5