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PmlimAnvironmental Assessment Work Plan <br /> Pittman Elementary School <br /> April 21,2003 <br /> Revised July 2,2003 <br /> - Page <br /> Additional sampling for arsenic may be required by DTSC if any of the discrete samples have elevated <br /> concentrations. <br /> Eight discrete background samples will be collected from 0 — 0.5 feet bgs at adjacent areas to the <br /> north, east,south, and west of the site and analyzed for CAM 17 Metals. <br /> Second discrete surface and subsurface soil samples will be collected from two sub-parcels for quality <br /> assurance/quality control. These samples will not be identifiable to the laboratory. The second samples <br /> will be prepared in an identical manner and analyzed for the same analytes as their primary counterparts. <br /> The general sample locations, sample types, and associated analyses are listed in Table 1. The laboratory <br /> analytical methods, detection limits, and associated United States Environmental Protection Agency <br /> tsc (USEPA) Region DC Preliminary Remediation Goal (PRG) values are presented in Appendix D. The <br /> proposed soil sample locations are shown in Figure 3,Appendix A. <br /> s' Table 1 —Sam les and Analins—Lawn Areas <br /> Locations Depths Matrix Total Number of Discrete <br /> Samples Samples Analyses Methods <br /> 10 <br /> Site 0-0.5 and 2-2.5 feet bgs soil 15 surfaceJH4 <br /> anochlorine Pesticides 8081A <br /> 1 sample per acre) (hold 15 deep) CAM17 6010B/7471A <br /> Arsenic 6010B <br /> Second Sample 0-0.5 and 2-2.5 feet bgs soil 1 surface 1 Or anochlorine Pesticides- 8081A <br /> old 1 de 1 CAM176010B/7471A <br /> Back ound 0-0.5 feet b s soil 8 surface 8 CAM17 6010B/7471A <br /> Equipment Blank water 1 1 Or anochlorine Pesticides 8081A <br /> 1 CAM17 6010B/7471A <br /> Structure Drinlinec SamplingSc�2(Fygire 4) <br /> Discrete surface soil samples will be collected from the vicinities of each of the fourteen structures on <br /> site to determine if lead contamination associated with possible lead-based paint is present at the site. <br /> Discrete surface soil samples will be collected from soil located along the driplines of each of the <br /> fourteen structures on site, approximately 0 — 0.5 and 2 —2.5 feet bgs. Where asphalt or concrete <br /> are present, samples will be collected from the soil under the surface material. Samples will be <br /> collected from seven locations from the driplines of the property warehouse and transportation <br /> buildings. The six residences, four sheds or garages, and the sewage screening plant will have <br /> samples collected from four locations along the driplines. The rehabilitation building at the <br /> southwest corner .of the property will have soil samples collected from approximately seven <br /> locations along its driplines.The discrete surface soil samples will be analyzed for lead by EPA Method <br /> 6010B. The deeper discrete soil samples (2 —2.5 feet bgs) will be archived frozen by the laboratory <br /> pending the laboratory results of the surface samples. Sample locations are indicated on Figure 4, <br /> Appendix A. <br /> Three second surface soil samples will be collected for quality assurance/quality control. These samples <br /> will not be identifiable to the laboratory. The second samples will be prepared in an identical manner and <br /> will be analyzed for the same analyte as its primary counterpart. The general sample locations, sample <br /> types, and associated analyses are listed in Table 2. <br /> is CONDOR <br />