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Hunter Container Corporation 35275 Hiq. 33, Vernalis, California April 23, 1996 Phase I-Site Characterization (WastelBurn Pit) Page: 2 contamination (Figure 2). Contamination was identified and confirmed in all four (4) of the hand borings. Concentrations ofEthylbenzene and Trichloroethylene (TCE)were detected in sample BB-3 at varying depths of four (4), six (6), eight (8) and ten (10) feet b.g.l. Samples from BB-4 had detectable concentrations of Ethylbenzene and TCE at eight (8) feet b.g.l. and Benzene, Toluene, and Xylene at eight (8) and ten (10) feet b.g.l. All analytes were discovered to have levels of contamination as none detectable for the 1-113-5 samples. EB-6 also had concentrations of Ethylb enzene, TCE,Benzene, Toluene, and Xylenes at 6, 8, and 10 feet b.g.l. 3.0 Scope of Work i _ On November 29, 1995, WHF Inc., in conjunction with SEMCO, a licensed environmental contractor from Modesto, California, removed the contents of the wastelbum pit, a concreted I cell (Figure 2). Approximately 29.86 tons (Appendix C) of soil was removed from the burn pit and placed on and covered with visdueen. This was done to prevent the contact of burn pit material with the around surface. The burn pit was primarily used for the disposal of unconsolidated debris andGarbage by incineration, as informed by a site worker. Once all contents were removed and stockpiled, four (4) seperate discrete soil samples, composited into one, were taken on February 16, 1996, from at least two (2) feet in depth into the spoils pile (Table 1, Appendix A). On March 6, 1996, WIU, Inc., conducted six (6) hand borings, RB-1 through R13-6 (Figure 2), to an approximate depth of 2.5 feet b.g.l. in the same area where contamination was previously identified in ERMs report dated April 15, 1995. Samples were taken at a deeper depth, 2.5 feet instead of off the top surface of the soil. This was accomplished to investigate and identify contamination posses an impact to the environmental conditions at the site. 3.1 Soil Sampling Soil samples, associated with the burn/waste pit, were taken in 1'/z" by 6" brass sleeves from at least two (2) feet into the spoils pile. All surface samples were conducted in _ the same manner except to a depth of approximately 2.5 feet b.g.l. The soil samples were then collected using a drive hammer sampler and spoon. The laboratory samples did not have any head space and were immediately sealed in their liners using aluminum foil-lined caps. They were then labeled and placed in an ice chest cooled with Blue Ice®. The samples were then delivered to the State-certified laboratory, California Laboratory Services, Inc., in Rancho Cordova California. 3.1 Requested Analyses The composited sample, CPS-2-(1, 2, 3, & 4), was collected for laboratory analysis s and analyzed using EPA method 6010/7000 for TTLC and STLC CAM Metals (Table