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23 July 2015 <br /> AGE Project No. 15-3320 <br /> Page 3 of 4 <br /> EPA Method 8015 Modified; and <br /> • Volatile organic compounds (VOCs) by EPA Method 82608. <br /> Laboratory reports for groundwater analysis, testing methods and laboratory quality <br /> assurance/quality control (QA/QC), and sample chain of custody documentation will be <br /> presented in a report with findings and further recommendations. <br /> FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of <br /> a California Professional Geologist. Procedures for the advancement of the soil borings, <br /> soil sampling, equipment decontamination and sample shipment are outlined below. <br /> SOIL BORING ADVACMENT AND SOIL SAMPLE COLLECTION <br /> Utilizing a track-mounted, hollow-stem drill rig, equipped with 8.25-inch diameter hollow- <br /> stem augers, two pilot soil borings will be advanced to depths of approximately 50 feet <br /> bsg. Proposed boring locations are illustrated in Figure 2. <br /> SOIL SAMPLING <br /> Beginning at 5 feet bsg, relatively undisturbed soil samples will be collected from each <br /> of the soil boring locations at 5-foot intervals using a California modified split-spoon <br /> sampler fitted with 2-inch diameter, 6-inch long steel sleeves. Upon removal from the <br /> sampler, the sample sleeves will be separated and the exposed ends of a selected <br /> sleeve will be covered with Teflon sheets, capped, and sealed with tape. Soils sampled <br /> in the borings will be visually classified by an AGE geologist in accordance with the <br /> Unified Soil Classification System (USCS). Additionally, soil samples will be field <br /> screened for the presence of volatile organic compounds using an organic vapor meter <br /> (OVM), equipped with a photo-ionization detector (PID). Soil sample descriptions and <br /> OVM readings will be recorded on a log for each boring. <br /> Following sample collection, each preserved sample sleeve will be labeled with the <br /> boring location, depth, time, date, and sampler's initials. Appropriately sealed and <br /> labeled samples will be placed in a chilled container and transported under chain of <br /> custody to a CDPH-certified laboratory for analysis for the constituents listed above. <br /> BORING ABANDONMENT <br /> Following completion of each of the two proposed borings, each location will be <br /> permanently sealed to prevent vertical migration of potential contaminants. The soil <br />