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k%1 KLEINFELDER <br /> A copy of the laboratory data sheets and chain-of-custody forms are included in Appendix <br /> C. Table 2 is a key presenting the sample location, sample number, and sample depth at <br /> the three HS areas. <br /> 3.1.7 GROUND WATER SAMPLE ANALYSES AND RESULTS <br /> Three ground water samples were collected from the monitoring wells on November 11, <br /> 1988, and submitted under chain-of-custody to Chemwest Analytical Laboratories. The <br /> samples were analyzed for TPH extractable by GC/FID, and BTEX by EPA Method 602. <br /> All constituents were reported below laboratory detection limits in the water samples. <br /> Copies of the laboratory data sheets and chain-of-custody form are included in Appendix <br /> C. <br /> 3.2 PESTICIDE AREA PS-3 <br /> PS-3 is located in the north central portion of the Weston Ranch parcels (Plate 2, Appendix <br /> A). Empty pesticide containers were observed in the area, and low concentrations of <br /> pesticides were detected from two surface samples collected during the preliminary soil <br /> sampling investigation. To assess the potential vertical migration of the pesticides, samples <br /> from two additional surface locations and four subsurface locations were collected and <br /> analyzed. <br /> On November 4, 1988, twelve additional soil samples were collected with a hand auger <br /> from area PS-3. Surface samples were collected from 0 to 0.5 feet at locations PS-3A and <br /> PS-3B. Subsurface samples were collected from 2 to 3 feet at locations PS-3A, PS-3B, PS- <br /> 3C, and PS-31). Surface samples were collected at PS-3C and PS-3D during the June, 1988 <br /> preliminary soil sampling investigation. A primary and duplicate sample was collected at <br /> each of the six sample locations. Each sample was collected in a laboratory glass jar with a <br /> Teflon lined lid, labeled and stored in an iced cooler. A summary of the PS-3 sample <br /> locations, sample I.D. numbers, and depths are presented on Table 3, PS-3 Soil Sample <br /> Locations. The PS sampling locations are shown on Plate 4, Appendix A. <br /> To minimize the potential for cross-contamination between samples, the sampling <br /> equipment was cleaned with a trisodium phosphate wash and distilled water rinse prior to <br /> collecting each soil sample. <br /> 161-89-107 9 <br />