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09 November 2021 <br />Project No. 21-6640 <br />Page 2 of 5 <br /> <br /> A report of findings will be prepared documenting the results of the investigation. <br /> <br />The proposed boring locations are illustrated in Figure 1. Each of these tasks are <br />described in greater detail below. <br /> <br /> <br />2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> <br />Applicable site assessment drilling permits will be obtained from the EHD. Also, a site- <br />specific Health and Safety Plan will be prepared. Prior to mobilization, each soil probe <br />boring location will be clearly marked, and a utility clearance obtained through <br />Underground Service Alert. The EHD will be contacted at least 48 hours prior to <br />conducting investigation activities to arrange for inspection. <br /> <br /> <br />2.2. SOIL BORING AND SAMPLING <br /> <br />Soil borings will be advanced to total depths of 15 feet bsg for collection of soil samples <br />utilizing a direct push drilling rig. During boring advancement discrete soil samples will be <br />collected at five-foot intervals based on proposed targeted sampling depths; the initial <br />five-foot sample will be hand packed from the hand auger during utility clearance, while <br />the remainder of the borings will be advanced using a direct push drilling rig. <br /> <br />Procedures for advancement of soil borings and soil sampling are presented in Section <br />3.0. <br /> <br /> <br />2.3. LABORATORY ANALYSIS <br /> <br />Selected soil samples will be analyzed by a California Environmental Laboratory <br />Accreditation Program (ELAP)-certified laboratory for volatile organic compounds (VOCs) <br />including fuel oxygenated compounds (MTBE, DIPE, TAME, ETBE and TBA), <br />naphthalene, ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance <br />with EPA Method 8260B. <br /> <br />Laboratory reports for all analyses, testing methods, laboratory quality assurance/quality <br />control (QA/QC) reports, and sample chain-of-custody documentation will be presented <br />in a report with the findings and recommendations. <br /> <br /> <br />2.4. SOIL-VAPOR SAMPLING AND SAMPLING <br /> <br />To evaluate subsurface impact near the hazardous waste storage area, parts washing, <br />and paint booth/paint gun washer areas, five (5) borings will be advanced to a total depth <br />of 5 feet bsg. Semi-permanent soil-vapor sampling wells will be installed and sampled <br />following a minimum two-hour stabilization period. Procedures for installation and