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13 May 2002 <br /> AGE-NC Project No. 03-1023 <br /> Page 3 of 5 <br /> • Pre-field work activities; <br /> • Soil excavation and backfilling; <br /> • Soil sample collection and analysis; <br /> • Soil stockpile sample collection and analysis; <br /> • Report preparation. <br /> Each of these tasks is described in greater detail below. <br /> 3.1. PRE-FIELD WORK ACTIVITIES <br /> A health and safety plan will be prepared in accordance with Occupational Safety and Health <br /> Guidance Manual far Hazardous Waste Site Activities (National Institute for Occupational Safety <br /> and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization,the area of excavation will be clearly marked and an utility clearance obtained <br /> through Underground Service Alert. <br /> 3.2. SOIL EXCAVATION <br /> Prior to backfilling the former UST excavation, impacted soil beneath the former dispenser island <br /> will be excavated. Based upon laboratory results of soil samples collected during removal <br /> procedures,approximately 100 tons of impacted soil will be removed from the former dispenser and <br /> UST area. Soil will be excavated to a depth of approximately 10 feet below surface grade (bsg). <br /> During excavation activities, excavated soil will be screened for volatile organic compounds using <br /> an organic vapor monitor (OVM). Excavated soil that appears visibly stained or has a petroleum <br /> hydrocarbon odor will be considered impacted. <br /> 3.3. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> A total of 5 soil samples will be collected from the excavation will be submitted for laboratory <br /> analysis. Following State of California Regional Water Quality Board, Tri-Regional Board <br /> recommendations, soil samples will be collected from the base and each side wall of the "new" <br /> excavation at a minimum interval of every 20 linear feet. Soil samples will be collected from the <br /> base of the excavation at a minimum of one sample for every 400 square feet of excavation area. <br /> Advanced GeoEnvironmental <br />