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I@4 KLEINFELDER <br /> Teflon sheeting and tight fitting plastic caps, labeled, and placed inside an iced cooler. At <br /> — the end of drilling opzrations, selected soil samples were delivered under chain-of-custody <br /> to California Analytical Laboratories/Enseco Inc.in West Sacramento. The remaining soil <br /> samples were retained in refrigerated storage for future reference or analysis. <br /> To reduce the potential for cross-contamination between borings, the augers and <br /> associated equipment were steam cleaned prior to drilling each boring. The sampling <br /> equipment was cleaned with a trisodium phosphate wash and rinse with distilled water <br /> prior to collecting each soil sample. At the completion of the sampling operations, each <br /> boring was tremmied to the surface with a bentonite-cement slurry. Soil cuttings removed <br /> from the borings were placed in 55-gallon steel drums,labeled,and left onsite. <br /> 3.2 QUALITATIVE FIELD SCREENING <br /> To provide a qualitative indication of contamination and to assist in selecting samples to be <br /> analyzed, a portable organic vapor detector was used to screen the samples in the field. A <br /> Photovac photoionization detector(PID) was used to measure total ionizable compounds <br /> in parts per million by volume(ppmv)relative to a calibration standard. <br /> Each sample was screened in the field, and the PID readings were recorded on the boring <br /> log. Organic vapor readings ranged from 0 to 0.2 ppmv, A summary of the PID readings <br /> for each sample is presented in Table 1,Sample Identification and PID Measurement Log, <br /> For the protection of the field crew, the PID was also used to measure the total volatile <br /> concentrations in the breathing zone prior to and during the drilling of the borings. No <br /> consistent volatile concentrations were detected in the breathing zone. <br /> 3.3 SAMPLE ANALYSES AND RESULTS <br /> W Soil samples were submitted under chain-of-custody to California Analytical <br /> Laboratories/Enseco in West Sacramento to provide a quantitative assessia�:nt of <br /> petroleum hydrocarbon and metal concentrations. Two samples from B-7 and one sample <br /> from B-8 were submitted for analysis. Selection of the samples for analysis was based on <br /> W field observations,depth in boring, and PIL field screening results. The twosamples from-.- <br /> were-analyzed Jor TPHextractable (Method 3550) by GC-FID; oil and grease by <br /> gravimetric method; and benzene toluene, ethyl benzene, and xylene (BTEX) by EPA <br /> F13-90-60 5 <br /> - 1 <br />