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17 March 2003 AGE-NC Project No. 01-0886 Page 3 of 5 of the unauthorized release of hydrocarbons. Therefore, a preliminary soil investigation will be conducted to further define the extent of the petroleum hydrocarbon contamination at the site. The scope of the work includes the advancement of one soil probe boring for the collection of soil samples.These samples will determine the vertical extent of hydrocarbon-impact at the site and aide in determining suitable locations for any necessary additional soil borings. The proposed scope of work will include the following tasks: • .Permitting and pre-field work activities; • Sample and analysis with laboratory reporting; • Report preparation. Each of these tasks is described in greater detail below. 3.1. PRE-FIELD WORK ACTIVITIES Applicable site assessment permits will be obtained from the EHD. An update to the health and safety plan presently on-file will be prepared in accordance with Occupational Safety and Health Guidance Manua-'.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 soil probe boring locations will be clearly marked and a utility clearance obtained through Underground Service Alert. 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS Initially,AGE proposes to advance one soil probe boring using direct push technology(DPT)in the vicinity of the southern edge of the former UST system area to evaluate the vertical extent of the petroleum hydrocarbon impact to soil. Soil samples will be collected at 5-foot intervals beginning at 5 feet bsg and extending to the total probe boring depth;AGE proposes to advance the soil boring to a depth of 50 feet or until field observations and field screening using an organic vapor monitor (OVM) indicate that detectable petroleum vapors are not present in the soil samples screened from two consecutive five-foot intervals. The proposed probe boring location is illustrated in Figure 2. The proposed probe boring location many be modified due to field observations or additional borings may be advanced,if necessary and with approval by the EHD.Field procedures for advancement of probe borings and collection of soil samples are presented in Section 4.1..1.