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4.0 Analytical Procedures <br /> As discussed in Section 3.0, all soil samples collected during this investigation will be screened <br /> for the presence of TPH and PNAs in the field using test kits. Based on the results of the test <br /> kits, a subset of the samples will be sent to a California state-certified laboratory for analysis. <br /> 4.1 Field Test Kits <br /> • All soil samples from each soil boring: <br /> Parameter groups: PNAs and TPH <br /> Purpose: To screen the presence of PNAs and/or TPH <br /> below 30 mg/kg in the soil. All samples with total <br /> PNA and/or TPH concentrations below 30 ppm <br /> ' as determined by the field test kit will be. sent to <br /> the laboratory for analysis. Approximately <br /> 25 percent of all samples with total PNA and/or <br /> I TPH concentrations at 30 ppm or higher as <br /> determined by the field test kit will be sent to the <br /> laboratory analysis. <br /> 4.2 Laboratory Analysis <br /> • All soil boring samples with any field test kit detection of below 30 mg/kg and <br /> an approximately one-quarter of those samples with above 30 mg/kg detection. <br /> Parameters: PNAs,BTEX, TPH-gasoline and TPH-diesel <br /> a Purpose: Characterize the extent of chemicals of concern <br /> in soil. <br /> • A subset of the soil boring samples being sent to the laboratory. <br /> Parameters: Moisture content, total organic carbon, cyanide, <br /> pH, and sieve analysis <br /> Purpose: Further characterize the extent of chemicals of <br /> ' concern and parameters useful for remedial <br /> alternatives assessment as noted in Table 2-1. <br /> • Source areas#1 and#4. <br /> Parameters: Moisture content, pH, and dry bulk density <br /> SF010030B84.DOC 4-1 <br />