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22 February 2008 AGE-NC Project No. 07-1586 Page 2 of 4 Water Basin(Basin 5-22). This basin is drained primarily by the San Joaquin River. The nearest surface water features in the vicinity of the property are the San Joaquin River and Little John Creek, located approximately 5 miles southwest and north, respectively, of the site. Ground water at the site is currently encountered at a depth between 20 and 25 feet below surface grade (bsg), and has a northwesterly flow direction. Presently, ground water occurs in an interval of predominantly clayey silt.Informally designated layer 2,this layer is approximately 15 feet thick and occurs between 20 feet and 35 feet bsg. Apparently discontinuous, 3- to 5-foot thick sand lenses occur sporadically within layer 2. 3.0. SCOPE OF WORK AGE will advance four shallow soil borings at the site, in the northern outer limits of an area of porous concrete. At least one soil sample taken from each boring will be analyzed. The site investigation will include the following tasks: • Permitting and pre-field work activities; • Soil sample collection and analysis; • Ground water sample collection and analysis, if necessary; and • Report preparation. The site assessment tasks are discussed below. 3.1. PRE-FIELD WORK TASKS A health and safety plan will be prepared in accordance with the 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,the area of excavation will be clearly marked and a utility clearance obtained through Underground Service Alert. 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS AGE proposes to advance four shallow soil borings at the site,in the northern outer limits of an area Advanced GeoEnvironmental,Inc.