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t <br /> ' FIELD SAMPLING PROGRAM <br /> The Phase 1 field investigation was conducted on June 24 and <br /> ' 25 , 1985. Samples were taken in those areas suspected of being <br /> contaminated. As discussed in the Preliminary Compliance Plan, <br /> these included the truck parking and lumber storage areas along the <br /> western boundary fence, and the ditch located at the north and west <br /> ' ends of the maintenance shop. In addition, two background soil <br /> samples were also collected. Both background sample locations were <br /> in areas assumed to be uncontaminated. Sample locations are shown <br /> on Figures 1 and 2, and indexed in Table 1. Sampling intervals are <br /> shown in Table 2. The following discussion summarizes the sampling <br /> ' methods used during the Phase 1 field investigation. <br /> ' Truck Parking Area. Twelve pits were excavated in the truck parking <br /> area (P1 through P4, P8 through P15) . The pits were excavated using <br /> a backhoe operated by AFPC personnel. Three discrete samples were <br /> itaken from each pit, at intervals of approximately 0 to 1, 1 to 2, <br /> and 2 to 3 feet below the ground surface. Samples were collected <br /> from the sidewall of each pit by first scraping away surface <br /> material, contacted by the backhoe bucket, to expose clean native <br /> ' soils. A grab sample was then obtained with a clean trowel and <br /> placed into a pre-cleaned glass jar. <br /> ' Lumber Storage Area. Three pits were excavated in the lumber <br /> storage area (P16 , P17, PIS) . Three discrete samples were collected <br /> ' from each pit, at intervals of approximately 0 to 1, 1 to 2, and 2 <br /> to 3 feet below the ground surface. Sampling methodology was <br /> ' identical to those described for the truck parking area. <br /> 1 - 2 - <br /> �c„o <br />