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v � Woodward-Clyde speed of sample collection. Soil samples were collected every five feet or every two feet V when advancing through a known contaminated zone using a "Probe Drive Sampler". Soil boring B-3A advanced during Phase III of the site characterization activities was drilled using a truck mounted drill rig equipped with 8-inch hollow stem augers provided by Spectrum Exploration of Stockton, California. All samplers, augers, and drill rig were steam cleaned prior to use in each boring. Soil samples were collected every five feet. Soil samples were collected with a California modified split spoon sampler. The cuttings from the boring B-3A were placed in 55-gallon drums and stored at the site for later disposal. V All borings were logged according to the Unified Soil Classification System. The headspace of the soil samples were measured in the field for organic vapor concentration using a photoionization meter. Soil samples were selected for chemical analysis based on the results of the organic vapor measurements and on visual observations of the soil conditions. All soil samples were analyzed for TPH as gasoline and TPH as diesel using modified EPA Method 8015 and benzene, toluene, ethylbenzene, xylenes (BTEX) using EPA Method 8020. V The soil headspace was measured for volatile organic compounds (VOCs) concentration by placing the soil in a resealable plastic bag for at least five minutes. After the soil was allowed to set, the probe of a HNu photoionization detector was placed in the plastic bag to measure the VOC concentration in the bag. The VOC soil headspace measurement was V recorded on the boring logs. Permit #006057 was procured from the SJCEHD on May 17, 1995. The following sections describe the methods and activities conducted in the three phases of site investigation. 2.1.1 Phase I Direct Push Technology Soil Borings On May 25 and 26, 1995, WCFS directed the advancement of soil borings east, west, north and south of the former UST (Figure 4). The soil borings were advanced to evaluate the presence or absence of petroleum hydrocarbons in the soil near the former UST. Soil borings B-1 through B-5 were advanced to a depth of 31 feet below ground surface (bgs). The borings upon completion were backfilled to surface with a neat cement plus bentonite V grout mixture. V 8054/FEMA/KJAXPIER.RPT/8-74-95 SAC 2-2 V