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18 May 2017 AdvancedGeo <br />AGE Project No. 09-1773 Environmental <br />Page 4 of 6 <br />3.1. SOIL BORING ADVACMENT AND SOIL SAMPLE COLLECTION <br />One shallow soil boring will be advanced to a depth of 25 feet bsg utilizing a truck- or <br />track-mounted, hollow-stem drill rig, equipped with 8.25-inch diameter hollow-stem <br />augers. The proposed boring location is illustrated in Figure 2. <br />3.2. SOIL SAMPLING <br />Beginning at 5 feet bsg, relatively undisturbed soil samples will be collected from the <br />proposed boring at 5-foot intervals using a California modified split-spoon sampler fitted <br />with 2-inch diameter, 6-inch long steel sleeves. Upon removal from the sampler, the <br />sample sleeves will be separated. The exposed ends of a selected sleeve will be covered <br />with Teflon sheets, capped, and sealed with tape. Soils sampled in the borings will be <br />visually classified by an AGE geologist in accordance with the Unified Soil Classification <br />System (USCS). Additionally, soil samples will be field screened for the presence of <br />volatile organic compounds using an organic vapor meter (OVM), equipped with a photo- <br />ionization detector (PID). Soil sample descriptions and OVM readings will be recorded on <br />a log for each boring. <br />Following sample collection, each preserved sample sleeve will be labeled with the boring <br />location, depth, time, date, and sampler's initials. Appropriately sealed and labeled <br />samples will be placed in a chilled container and transported under chain of custody to a <br />CDPH-certified laboratory for analysis for the constituents listed in Section 2.2. <br />3.3. MONITORING WELL INSTALLATION <br />One shallow-screened groundwater monitoring well is proposed for installation in the area <br />illustrated in Figure 2. The proposed shallow well will be screened from 5 to 25 feet bsg. <br />Further determination on the installation of the well will be completed following field soil <br />sample collection. <br />3.4. WELL COMPLETION <br />Following advancement of the pilot boring, well casing, filter pack and sealing materials <br />will be placed into the borehole through the interior of the hollow-stem augers. For the <br />propose shallow well, a 2-inch diameter, 5-foot Schedule 40 PVC blank casing and a 20- <br />foot section of 0.020-inch slotted well screen will be installed in the borehole. <br />After installing the well casing, filter pack material consisting of pre-washed #3 sand will <br />be added from the bottom of the borehole to approximately one foot above the screened <br />interval. Following placement of the filter pack, the well will be surged to assist filter pack <br />settling. Additional sand will be added if settling occurs.