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5*XSTZ:;::: OG/ES Sectiop C of the CSDF. Historical Chemical Use. will be used to determine whether or not the contaminated soil is from• - of known previoususe. For contaminated soil with properly documented previous use, Forward will identify and list the chemicals and chemical hazards associated with the industry or type of previous use. Appropriate corresponding methods of analysis that will be required to identify such chemicals will be listed as shown in the attached example for contaminated soil from a gas station Crable 1). If the source and historical chemical use associated with the contaminated soil are unknown, then contaminated soil must be for pollutants, _• on + Sectionof ) Previous Sr r be + by • , to determine availability of appropriate chemical description of the contaminated soil in previous soil investigations or remedial investigations. If previous investigation data for chemical contaminants are available, the reports containing such information will have to be submitted to Forward. In the absenceof any such previous information,d will request the generator to conduct the chemical analyses listed in Table 2 to identify the types and concentrations of chemicals in the contaminated soil,d soil is considered inert construction debris,+, 1yd.)- Secfign E. Cbemical Analysis CgilducMd on Soil. will be compared with the required methods of analysis to the equivalent list for Table 1, that were derived from the historical chemical use at the source of the contaminated soil. If the types of analysis already conducted on the contaminated soil do not encompass the equivalent list for Table 1, those analyses not covered will be requested from the generator in order to complete the evaluation of the contaminated ,• n. ' a stockpile will be evaluated for sufficiency, quality, and representativeness of samples. Sampling design, including targeted locations (such as "hot spots") and discrete methods (such as random, stratified and systematic) will be used to determine whether the sampling protocol is acceptable. Section G. Chemical Result Summary. will be used to determine the chemical contaminants in the soil, and whether their concentrations are within the acceptance criteria specified in the WDR and in this self -implementing program. The roodal and highest concentration ranges for detectable chemicals in the contaminated soil will be used to estimate the most probable concentrations of the chemicals in the contaminated soil. The avers a concentration will be compared to contaminant -specific designation levels and those specified in the WDR to determine soil type. Volume and percentage of soil containing the detectable chemicals will be used to identify which portions of the soil can be accepted, assuming that the contaminated soil can be segregated according to chemical types and/or concentrations. 12 7255 Sorom Drive •Ooklond,California,USA 94611 TEL (415)339-1543- FAX (415)339-6775