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k'q KLEINFELDER wells are tied into a bench mark near the southeast corner of the site on Manthey Road, north of Wolfe Road. The depth to static ground water was measured from a set location at the top of the PVC casing. The depth to water was subtracted from the elevation of the top of the well casing to provide a ground water elevation for each monitoring well location. Depth-to-water measurements were collected on November 8, 1988 and November 11, 1988 prior to the well development and sampling. The well elevations, depth to water measurements, and calculated ground water elevations are present on Table 1, Ground Water Elevation Data. The ground water elevations were used to construct two Ground Water Elevation Contour Maps (Plates 5 and 6, Appendix A). The contour maps indicate local ground water flows in a southeast direction. 3.1.6 SOIL SAMPLE ANALYSES AND RESULTS November 3 and 4, 1988, 36 soil samples were collected from 11 soil borings in the three HS areas (Plates 2 and 3, Appendix A). Twenty-one samples were submitted to Chemwest Analytical Laboratories, Inc., in Sacramento, California. One sample from each central HS boring (28982/HS-1, 29016/HS-2, and 29003/HS-4) were analyzed for TPH extractable by GC/FID and benzene, toluene, ethylbenzene, and xylene (BTEX) by EPA Method 8020. Eighteen soil samples (an additional sample from the central HS borings and one to two samples from the radial borings) were analyzed for TPH by IR Method 418.1. The source of the hydrocarbon stains is unknown, although a mobile fuel storage tank is suspected. The original TPH concentrations were detected by IR Method 418.1. Method 418.1 detects a wide range of hydrocarbons but does not identify specific hydrocarbons (i.e. gasoline, diesel, or motor oil). The TPH extractable by GC/FID and BTEX were analyzed in an attempt to identify detected hydrocarbons. Concentrations in the samples analyzed for TPH extractable by GC/FID and BTEX were below laboratory detection limits. Concentrations of 60 mg/kg and 27 mg/kg were detected in Samples 28983 and 29007 analyzed for TPH by IR Method 418.1. Sample 28983 was collected from area HS-1, boring B-10/MW-2 at a depth of 5 feet. Sample 29007 was collected from area HS-4, boring B-3 at a depth of 5 feet. The remaining samples analyzed by Method 418.1 had TPH concentrations below laboratory detection limits. 161-89-107 8