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2-2 Drilling was completed using 4-114-inch inside diameter hollow-stem augers Soil samples were collected during borehole advancement to visually identify the subsurface materials and to submit selected samples for laboratory analyses Soil samples were collected using 2-inch diameter, 2-foot long split-barrel samplers in accordance with the American Society for Test- ing and Materials (ASTM) Method D-1586-74 (Standard Method for Penetration Test and Spht-Barrel Sampling of Soils) Immediately upon retrieval, split-barrel soil samples were opened and scanned directly along the entire length of the soil sample with a photoionization detector (PID) to evaluate relative concentrations of volatile organic vapors in the soil Maximum deflections measured by the PID were recorded Soil samples selected for analysis were collected directly from the split- barrel sampler into laboratory-supplied sampling containers The sampling containers were filled so that zero headspace was present in the sample container Soil selected for sample analysis from the split-barrel samples was based on visual, olfactory, and/or PID screening results indicating the potentially greatest impact from site-related constituents Soil samples collected for analysis from previously selected intervals were collected prior to PID screening All spht-barrel soil samples were visually identified using the Unified Soil Classification Sys- tem (USCS) in accordance with ASTM Method D-2488-90 (Standard Practice for Description and Identification of Soils [Visual-Manual Procedure]) The visual identification of soils encountered in each boring was summarized m boring logs, which are presented in Appendix B Spht-barrel soil samples were collected on a continuous basis from Soil Boring SB-2, the first soil boring that was drilled to evaluate the subsurface geology Soil samples were col- lected on a less frequent basis from subsequent borings because a general knowledge of sub- surface geology had been developed during advancement of Soil Boring SB-2 21025 i "REALISTIC SOLUTIONS FOR HAZARDOUS WASTE PROOLEMS"