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22 March 2017 <br />AGE Project No. 98-0448 <br />Page 2 of 5 <br />Quarterly groundwater sampling and analysis; and <br />Preparation of a report of findings. <br />2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br />Applicable site assessment drilling permits will be obtained from the San Joaquin County <br />Environmental Health Department (EHD). In addition, an update to the health and safety <br />plan presently on-file will be prepared in accordance with Occupational Safety and Health <br />Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational <br />Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection <br />Agency, 1985). Prior to mobilization, the proposed boring/well locations will be clearly <br />marked and a utility clearance obtained through Underground Service Alert. <br />2.2. DRILLING AND SAMPLE ANALYSIS <br />AGE proposes to advance one on-site soil boring to a depth of approximately 130 feet <br />bsg for installation of a deep groundwater monitoring well. The soil boring will be <br />advanced using a truck-mounted drill rig equipped with 8.25-inch hollow-stem augers. <br />The total depth of the well boring may vary according to geologic/hydrogeologic <br />conditions encountered during drilling. Relative to existing site conditions, the location of <br />the proposed groundwater monitoring well is as follows: <br />One, deep groundwater monitoring well (MW-21) will be located approximately 115 <br />to 125 feet south-southwest of the MW-16/MW-17 monitoring well area, and <br />approximately 50 feet south of the B-8/B-11 soil boring area to evaluate <br />groundwater impact previously reported from B-8, B-10, B-11, B-12 and the <br />potential migration south from the former UST area; <br />The proposed monitoring well location is illustrated in Figure 2. <br />Soil samples will be collected at 5-foot intervals for soil logging purposes only, staring at <br />a depth of approximately 100 feet below surface grade to total depth. <br />2.3. MONITORING WELL INSTALLATION, DEVELOPMENT, AND SURVEY <br />The soil boring will be single-completed as a deep groundwater monitoring wells (-130 <br />feet bsg). The proposed monitoring well will be screened at depths of approximately 120 <br />feet to 130 feet bsg. Depth of the screened interval may vary according to hydrogeologic <br />conditions encountered while drilling. <br />Following installation, the well will be developed to maximize water flow and minimize the <br />amount of fine-grained sediment drawn into the well during pumping or bailing. The top