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02 January 2015 AGE Project No. 13-2557 Page 4 of 7 3.1. PERMITTING AND PRE-FIELD WORK PREPARATIONS Applicable site assessment permits will be obtained from the SJCEHD. In addition, a site specific health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, each soil boring will be clearly marked and a utility clearance obtained through Underground Service Alert. The SJCEHD will be contacted at least 48 hours prior to conducting any field work. 3.2. SOIL PROBE BORING AND SAMPLING AGE proposes to advance a total of eight (8) soil probe borings utilizing direct push drilling technology to assess the lateral and vertical extent of petroleum hydrocarbon impact to the subsurface of the site. Proposed soil boring locations are depicted in Figure 2. Initially, AGE proposes to advance one (1) soil probe boring in the center of the UST excavation, and seven (7) soil probe borings surrounding the UST excavation. A description of proposed soil boring locations and sampling are provided below: One soil boring will be advanced in the center of the UST excavation, beneath sample Tank #1-9 ft; the boring will be advanced to approximately 40 feet bsg for the collection of soil samples and shallow and deep grab groundwater samples to assess the vertical extent of petroleum hydrocarbon impact. However, the soil boring may be terminated at a shallower depth if field observations (hydrocarbon odor and organic vapor meter concentrations) indicate that hydrocarbon impact has been vertically assessed. Conversely, if field observations indicate hydrocarbon impact in the soil sample collected at 40 feet bsg, the boring will be advanced 10 feet deeper to 50 feet bsg; One soil boring will be advanced approximately 15-20 feet south of the UST excavation; the boring will advanced to 20 feet bsg for the collection of soil and groundwater samples to assess the lateral and vertical extent of petroleum hydrocarbon impact in the presumed up-gradient direction; Two soil borings will be advanced approximately 20-25 feet to the east and 40-45 feet west of the UST excavation; the borings will be advanced to 20 feet bsg for the collection of soil and groundwater samples to assess the lateral and vertical extent of petroleum hydrocarbon impact in the presumed cross-gradient direction; and Four soil borings will be advanced north, northeast and northwest of the UST excavation (approximately 25-30 feet north, approximately 50-55 feet north- northeast, approximately 35-40 feet northeast and approximately 60-65 feet northwest); the borings will advanced to 20 feet bsg for the collection of soil and Advanced GeoEnvironmental Inc.