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Spectrum steam-cleaned the augers before use in each boring in order to minimize the possibility of cross-contamination. The locations of the borings and other site features are shown on Figure 2-Site Plan/Site Vicinity Map. Soil cuttings were placed in Department of Transportation (DOT) approved 55-gallon drums and stored onsite pending receipt of analytical results. The soil will be disposed of at an appropriate handling facility. Soil Samoline Soil samples were collected at 5-foot intervals to the total depth of each boring. Soil samples were obtained by advancing the hollow-stem auger to a point just above the sampling depth and then driving a California-modified, 18-inch split-spoon sampler into the soil. The sampler, containing three 6-inch-long sampling tubes made of brass, was driven 18 inches into the ground with a standard 140-pound hammer repeatedly dropped 30 inches. The number of blows required to drive the sampler each successive 6 inches was counted and recorded to evaluate the relative density of the soils. The brass tubes containing the soil samples were removed from the sampler and one brass tube : . was sealed promptly with Teflon tape, plastic end-caps, and placed in a sealed plastic bag. The samples were labeled according to boring number and depth of collection and were placed promptly in iced storage. The field geologist initiated a Chain-of-Custody Record to accompany the samples to the laboratory. Ground Zero followed this chain-of-custody protocol throughout field and laboratory procedures. An Organic Vapor Meter (OVM) was used in the field to make a general evaluation of the extent of hydrocarbon concentrations in the soil. The OVM uses a photo-ionization detector (PID) to measure the total concentration of ionizable compounds (including hydrocarbons) in vapor emitted from soil under ambient field conditions. Variations in soil type, soil temperature, moisture content, ambient air temperature, and vapor pressures of respective compounds affect the readings obtained from the PID. Laboratory analysis involves extraction of hydrocarbons from the sample under controlled laboratory conditions. As a result, readings obtained with a PID may not correspond to the results obtained by laboratory analyses. A total of eighteen soil samples collected from the borings during the May 1995 subsurface environmental investigation, were submitted to Argon Laboratories (Argon) of Ceres, California (FLAP #1873) for analysis. All soil samples were analyzed for TPHg by EPA Modified Method 8015, BTEX by EPA Method 8020, Total Oil and Grease by Method 5520B, and Total Lead by Method 7420.