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'"W 21 March 2003 AGE-NC Project No. 95-0114 Page 5 of 10 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES Applicable site assessment permits will be obtained from the San Joaquin County Environmental Health Department(EHD); in addition,AGE will obtain any necessary encroachment permits from the City of Stockton, access agreements from private property owners and the Stockton Unified School District (SUSD) to assess on their properties. As required by EHD permitting, a 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 and U.S. Environmental Protection Agency, 1985). Prior to mobilization, each soil probe location will be clearly marked and a utility clearance obtained through Underground Service Alert. 3.2. PILOT BORING AND MONITORING WELL INSTALLATION Based on CPT,monitoring well and soil boring data,AGE proposes to advance four soil borings on- and off-site for the collection of soil samples and the installation of multi-level ground water monitoring wells (Figure 2): • One soil boring advanced on-site to approximately 150 feet bsg at the former UST cluster for installation of a multi-level monitoring well to determine the vertical extent of hydrocarbon-impacted ground water. • One soil boring advanced at the southeast corner of Harding Way and Monroe Street for installation a of multi-level monitoring well to determine the eastern lateral extent as well as vertical extent of hydrocarbon-impacted ground eater. • Two soil borings advanced at the location of MW-10 and east of CPT6 for installation of multi-level monitoring wells to monitor and define the north-eastern lateral and vertical extent of hydrocarbon-impacted ground water. However,drilling depth and well installation design may exceed the total of 150 feet,based on field indications from soil samples collected and field observation.During the drilling of the proposed soil boring located near the former UST location, soil samples will be collected utilizing a five-foot continuous-core sampler. Soil samples collected from the pilot borings for the monitoring wells located off-site will be collected every 5 feet.Field procedures for the collection of soil samples are presented in Section 4.1.1. Advanced GeoEnvironmental,Inc.