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The soil boring Iocations were selected to attempt to provide reasonable delineation of the vertical and i horizontal extent of petroleum hydrocarbon impact. Upon arrival on site'to perform the borings, boring SB-2 was moved approximately 3 feet toward the north due to the presence of a utility corridor. After completion of the soil sampling and boring activities,the borings were abandoned using Portland cement from the bottom of the hole to about 1.5 feet below the existing ground surface. A concrete cap was then `• placed from approximately 1.5 to the surface. i 3.2 Soil Sample Collection '} _ 4 Soil samples were collected at five foot intervals from each soil.boring using a California modified �t stainless steel split spoon sampler. The sampler contained three stainless-steel sleeves which were used to collect the soil inside the sampler. Upon retrieval of the split spoon from the soil boring, a stainless- steel sleeve of soil was selected for laboratory analysis and the remainingisoil was used for field observations. Soil from each sample was collected into plastic ziplock bags to field screen for petroleum !� hydrocarbon contaminants using a photoionization detector(PID). !Each soil sample was classified based on physical properties and recorded on a soil boring log(Appendix`tB). Based on PID results and field observations, soil samples were selected for laboratory analysis. it The hollow stem augers and sampling equipment were decontaminated using a high pressure steam E ' cleaning unit between each soil boring. The stainless-steel split spoon sampler was cleaned with an Alconox® wash followed by a rinse with deionized water between sample intervals. The decontamination cleaning procedures are used to avoid cross contamination between soil borings and soil samples. 3. !Y The soil samples, collected in stainless-steel tubes,were sealed with Teflon swatches, capped, labeled, preserved on ice, and submitted under proper chain-of-custody documentation for chemical analyses to Calscience Environmental Laboratories, Inc. The analytical laboratory report for the investigation is provided as Appendix A to this report. The soil analytical data are!summarized in Table 1., 3.3 Analysis Methods ;E All samples were analyzed for total petroleum hydrocarbons quantified as`diesel (TPH-d)by EPA Method 8015-modified. 6 r