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• <br />AdvancedGeo <br />Environmental mom <br />05 January 2018 <br />AGE Project No. 18-4265 <br />Page 3 of 6 <br />PERMITTING AND PRE-FIELD WORK ACTIVITIES <br />Applicable drilling permits will be obtained from the San Joaquin County Environmental <br />Health Department (SJCEHD) and a site-specific Health and Safety Plan will be prepared. <br />Prior to mobilization, each soil boring location will be clearly marked and a utility clearance <br />obtained through Underground Service Alert. The SJCEHD will be contacted a minimum <br />of two days prior to conducting investigation activities to arrange for inspection. <br />Additionally, a ground-penetrating radar (GPR) survey will be performed of selected areas <br />at the site. GPR will be performed at the suspected locations of the former USTs and <br />former lifts. Proposed soil boring locations may be moved as a result of GPR findings. <br />Additionally, other areas of possible in-ground structures will be surveyed. <br />FIELD PROCEDURES <br />All field procedures will be overseen by an AGE representative working under the <br />supervision of a California Professional Geologist. Procedures for sample collection and <br />analysis, equipment decontamination and sample handling are presented below. <br />SOIL SAMPLING <br />Soil samples will be collected selected depths using a 1.45 inch Geoprobe soil sampling <br />assembly loaded with a two-foot acetate liner. Upon sample retrieval, a selected portion <br />of the acetate liner will be cut and covered with Teflon sheets, capped and sealed with <br />tape. <br />Appropriately sealed and labeled samples will be placed in a chilled container under ice <br />and transported under chain-of-custody procedure to a CDPH-certified laboratory. Each <br />sample will be labeled with boring designation, depth, time, date and sampler's initials. <br />Soils encountered in the borings will be visually classified by AGE personnel in <br />accordance with the Unified Soil Classification System (USCS). <br />Additionally, soil sample duplicates and soil-vapor samples will be field screened for <br />organic vapors utilizing a photo-ionization detector (PID). <br />SOIL-VAPOR SAMPLING <br />Soil-vapor samples will be collected using temporary soil-vapor wells. For installation of <br />the soil-vapor well, a temporary/disposable vapor-tip and 'A-inch Teflon tubing will be <br />lowered to the base of the borings; two feet of tubing will remain outside the borehole for