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LFR Inc. <br /> performed as indicated by the analytical results to ensure the removal of the Class I <br /> non-RCRA hazardous waste from the Site and to characterize soil quality beneath the <br /> excavated material. <br /> Soil sample results that confirmed <br /> that Class I non-RCRA waste had <br /> been removed were evaluated to <br /> assess whether additional excavationmi <br /> ' -- <br /> was necessary. Soil containing <br /> metals concentrations above the <br /> calculated background <br /> concentrations was excavated and <br /> disposed of as Class Il waste. Soil <br /> with staining and odors identified as <br /> containing pyrolytic oil) was also a, <br /> removed. Disposal of pyrolytic oil- <br /> affected soil (if present) was <br /> determined following Photograph 8 <br /> communication (by SCI) with Class Soil excavation and trench evaluation <br /> II landfills. Samples of pyrolytic oil- activities <br /> affected soil were analyzed generally <br /> analyzed for volatile organic <br /> compounds (VOCs) by EPA Method 8260, semivolatile organic compounds (SVOCs) <br /> by EPA Method 8270, and total recoverable petroleum hydrocarbons (TRPH) by EPA <br /> Method 8015. Pyrolytic oil-affected soil was characterized as a "Class 1I designated <br /> waste" due to concentrations of diesel and motor oil range hydrocarbons. <br /> Confirmation sampling for removal of Class II materials followed excavation activities <br /> and was performed as described in Section 5.4 of this report. The excavation and <br /> confirmation sampling sequence was repeated until the Class II waste was successfully <br /> removed. <br /> 5.4 Confirmation Soil Sampling <br /> Soil samples were collected from excavated former waste disposal areas, excavated <br /> burn-pile areas, an excavated lead-affected soil area, and from multiple pyrolytic oil- <br /> affected soil areas to confirm that soil affected with hazardous concentrations of metals <br /> or elevated organic compound concentrations had been removed from the Site <br /> (Photograph 9). Soil samples were collected from varying depths in approximate 50- <br /> foot grid patterns and submitted to California certified analytical laboratories (Severn <br /> Trent Laboratories of West Sacramento, California [STL] or Curtis & Tompkins of <br /> Berkeley, California [C&T]) for analysis. Confirmation soil sampling locations are <br /> shown on Figure 5. Analytical results were evaluated and additional excavation was <br /> recommended in areas where soil sampling results indicated that concentrations of <br /> metals were above hazardous levels or organic compounds were above cleanup goals. <br /> rpt-RA_summ-Nov06-fina1-09025 Page 17 <br />