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02 April 2018 AdvancedGeo <br /> AGE Project No. 18-4357 Environmental <br /> Page 4 of 5 <br /> trench. However, to fill any data gaps which were not fulfilled during the, soil sampling will <br /> likely be required to ensure, reuse or backfill and disposal of the soil is practicable. <br /> Each soil sample will be collected with a metric soil sampling slide-hammer, loaded with <br /> a pre-cleaned steel sleeve. Appropriately sealed and labeled samples will be placed in a <br /> chilled container under ice and transported under chain-of-custody procedure to a CDPH- <br /> certified laboratory. Each sample sleeve will be labeled with trench designation, depth, <br /> time, date and sampler's initials. Soils encountered in the trenches will be visually <br /> classified by AGE personnel in accordance with the USCS. Additionally, soil samples will <br /> be field-screened for presence of volatile organic compounds using an OVM. <br /> Selected soil samples collected from the trenches will be analyzed for the suite of <br /> chemicals listed in the Section 3.4. <br /> AGE anticipates up to 8 samples to be analyzed for the production chemicals of concern; <br /> however, each will be selected to evaluate selected chemicals based on location and <br /> distribution. Laboratory reports for analyses, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports, and sample chain-of-custody documentation <br /> will be presented in a report with the findings and recommendations. <br /> 3.4. LABORATORY ANALYSIS <br /> Selected soil samples (appropriate for each evaluation and chemical source) will be <br /> analyzed by a California Department of Public Health (CDPH)-certified laboratory for <br /> the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline, diesel and oil range <br /> compounds (TPH-g.d.o) in accordance with EPA Method 8015 Modified; <br /> • Volatile organic compounds (VOCs), including chlorinated VOCs and "BTEX" <br /> compounds and fuel additives/fuel oxygenates (methyl tertiary butyl ether[MTBE], <br /> tertiary butyl alcohol [TBA], di-isopropyl ether [DIPE], ethyl tertiary butyl ether <br /> [ETBE], tertiary amyl methyl ether [TAME] and lead scavengers <br /> 1,2-dichloroethane [1,2-DCA] and 1,2-dibromomethane [EDB]) in accordance with <br /> EPA Method 826013; <br /> • Polychlorinated bi-phenols (PCBs) in accordance with EPA Method 8082. <br /> • Polynuclear aromatic hydrocarbons (PNAs) or polycyclic aromatic hydrocarbons <br /> (PAHs) and semi-volatile organic compounds (SVOCs) in accordance with EPA <br /> Method 8270; <br /> • CAM 17 Metals Total Threshold Limit Concentration (minimally: lead, cadmium, <br /> chromium, nickel and zinc) by EPA Method 6010B/6020/207/208. Soluble <br /> Threshold Limit Concentration may additionally be analyzed for metals. <br />