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02 April 2018 AdvancedGeo <br /> AGE Project No. 18-4357 Environmental <br /> Page 2 of 5 <br /> waste remaining at the site and determine the limits of soil contamination. For this <br /> investigation, the proposed scope is as follows: <br /> • Pre-field work activities; <br /> • Possible Geophysical survey of the site; <br /> • Soil trench advancement and soil sample collection; <br /> • Sample Analysis; and <br /> • Report preparation including an updated plan of the site contamination. <br /> Each of these tasks is described in greater detail below. <br /> 3.1. PRE-FIELD WORK ACTIVITIES <br /> Applicable site assessment approval will be obtained from the SJCEHD. A general utility <br /> clearance will be conducted with USA North. In addition, a health and safety plan will be <br /> updated in accordance with Occupational Safety and Health Guidance Manual for <br /> Hazardous Waste Site Activities (National Institute for Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization, each proposed boring location will be clearly marked and a utility <br /> clearance obtained through Underground Service Alert. If required a Geophysical survey <br /> maybe conducted to evaluate subsurface utilities. <br /> 3.2. SOIL EXCAVATION AND TRENCHING <br /> AGE proposes to excavate a total of eight (8) trenches utilizing a backhoe or similar <br /> excavator to investigate remaining waste and soil contamination in and around the former <br /> used oil filter and waste oil recovery storage area at the site. Trenches will be established <br /> to depths of approximately five feet bsg and beneath the backfill material in the soil <br /> excavation areas. Proposed trenching locations are depicted in Figure 1. <br /> During trenching activities, waste/soil samples will be collected at approximately five feet <br /> bsg for analysis to determine possible contamination. Excavated materials will be <br /> stockpiled at the surface next to each trench pending the receipt of analytical results. <br /> Based on the analytical results the trenches will either be backfilled with the excavated <br /> materials or further actions will be determined as needed. <br /> All field procedures will be overseen by an AGE representative under the supervision of <br /> a California Professional Geologist. All workers present at the site will have attended the <br /> following program: Health and Safety Training for Hazardous Waste Worker — 40 Hour <br /> Training - 29 CFR 1910.120 e.3J and T8 CCR5192 e.3.a. <br />