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1993 The groundwater table elevation and calculated gradient from the July, October, and December measurements are shown on Figures A-5 through A-7 of Appendix A, respectively The groundwater collected from the wells was analyzed for TPH-E, and BTEX. The results of the July 1993 analyses detected total xylenes (0.9 µg/L) in the sample from MW-1 and ethyl-benzene (0.6 µg/I.) in the samples from MW-2. In the October 1993 sampling, no compounds were detected. The analytical results of the December 1993 groundwater ' sampling detected toluene, total xylenes, and diesel at 1.9 µg/L, 0.7 µg/1., and 01 mg/I., respectively to the sample from MW-2 and toluene and total xylenes at 0 5 µg/L and 0.7 µg/1., respectively in the sample from MW-1. No benzene was detected in groundwater samples ' from the site ' 3.0 ICF KAISER INVESTIGATION The recent site investigation conducted by ICF Kaiser Engineers (ICF KE) is presented below. For descriptions of monitoring-well construction, development and sampling, water- level measurements, and sample analysis methods used in previous investigations by WHF, please refer to the WHF Reports of June 21, 1990 through January 10, 1994. IP 3.1 Drilling and Soil Sampling from Soil Borings VB01, 5B01, and MW-5 ' Drillingof vertical bona 01 slant boring SB01 and monitor well bonn g {� )� g { }� g ' (MW-5) was performed by ICF KE and West Hazmat Drilling on October 3 and 4, 1994 The approximate locations of the borings are shown on Figure 2 Drilling was accomplished using 8-inch hollow stem augers with a CME high-torque dnll ng An 18-inch modified California split spoon sampler was driven ahead of the augers to collect undisturbed soil samples at approximate 5-foot intervals The soil samples were retained in clean brass liners within the sampler After collection, the brass liners with designated soil samples were quickly sealed with teflon tape, capped with plastic end caps, duct taped, labeled and immediately placed in a chilled cooler for transportation to a laboratory Strict chain-0f-custody procedures were followed during sample collection and delivery to the laboratory. A portable HNu photo- ionization detector (PID) with 10 8 eV potential UV lamp was used to field screen for BTEX compounds in the soil samples, drill cuttings and breathing zones during the drilling efforts Portions of the soil samples not used for analyses were field screened with the HNu and used for lithological descriptions 4