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28 August 2017 Advanced <br /> AGE Project No. 14-3096 " " ' " " '' ' ' I ' <br /> Page 2 of 7 M <br /> samples; and one (1) soil boring to a maximum depth of 90 feet for collection of grab <br /> groundwater samples that will be converted to a Zone B-screened groundwater <br /> monitoring well at depths between 50 and 65 feet below surface grade (bsg). The <br /> proposed shallow on-site soil borings will compare site conditions to the criteria <br /> established in the LTCP. The proposed off-site soil boring and well data will assess the <br /> lateral extent of MTBE impact resulting from leaking UST's to the north and northwest of <br /> the site. The scope of work will include the following tasks: <br /> • Permitting and pre-field work activities; <br /> • Drilling and soil boring advancement; <br /> • Soil sample collection; <br /> • Grab groundwater sample collection; <br /> • Monitoring well installation, development, and elevation survey; <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 (SJCEHD) and if necessary encroachment permits will <br /> be obtained from the City of Manteca Public Works Department. <br /> An update to the health and safety plan presently on-file will be prepared in accordance <br /> with Occupational Safety and Health Guidance Manual for Hazardous Waste Site <br /> Activities (National Institute for Occupational Safety and Health Administration, U.S. <br /> Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization, the proposed boring/well locations will be clearly marked and a utility <br /> clearance obtained through Underground Service Alert. The SJCEHD will be contacted <br /> at least 48 hours prior to conducting any field work. <br /> 2.2. DRILLING <br /> AGE proposes to advance three (3) on-site soil borings to depths of 5-feet bsg for <br /> collection of soil samples to evaluate site conditions (i.e. hydrocarbon impact) with the <br /> criteria established in the LTCP. Additionally, AGE proposes to advance two (2) off-site <br /> soil borings for collection of grab groundwater samples in each identified groundwater <br /> zone (Zone A, B, C, and D) to evaluate lateral extent of MTBE migration northwest of the <br /> site. One (1) soil boring will be advanced to a maximum depth of 115 feet for collection of <br />