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17 December 2019 <br />AGE Project No. 14-3002 <br />Page 2 of 6 <br /> <br />in the Site Historical Activity Report, Amended August 2018, the Initial Site Investigation <br />Work Plan – Final dated 31 August 2018, and the Revised Site Assessment Report dated <br />03 September 2019. <br /> <br /> <br />3.0. SCOPE OF WORK AND PROCEDURES <br /> <br />The scope of work was developed based on data collected during the previous <br />investigation, comments presented in the CVRWQCB letter dated 20 August 2019, and <br />comments discussed in a teleconference with CVRWQCB staff on 12 December 2019. <br />AGE proposes to advance approximately six (6) soil borings to total depths of 10 feet <br />below surface grade (bsg) along the eastern property boundary to delineate the former <br />South Waste Cell. Additionally, AGE proposes to advance fifteen (15) soil borings and <br />collect four (4) surface samples in the former power plant area. Borings will be advanced <br />in the former power plant area to total depths of 10 feet bsg and 20 feet bsg to define the <br />limits of PCB- and TPH-impacted soil. Surface samples will be collected between 6 and <br />12 inches bsg adjacent to borings B30, B31, B35, and B43 to assess PCB impact to the <br />surface in locations where elevated levels of PCBs were detected at 5 feet bsg. <br /> <br />For this investigation, the proposed scope of work includes the following tasks: <br /> <br /> Permitting and pre-field work activities. <br /> Soil boring advancement and sample collection. <br /> Sample analyses. <br /> Boring abandonment. <br /> Report preparation. <br /> <br />Each of these tasks is described in greater detail below. <br /> <br /> <br />3.1. PRE-FIELD WORK ACTIVITIES <br /> <br />Applicable drilling permits will be obtained from the San Joaquin County Environmental <br />Health Department (SJCEHD). In addition, a health and safety plan will be updated in <br />accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste <br />Site Activities (National Institute for Occupational Safety and Health Administration, U.S. <br />Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, <br />each proposed boring location will be clearly marked, and a utility clearance obtained <br />through Underground Service Alert. <br /> <br /> <br />