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29 July 1999 <br /> AGE-NC Project No. 98-0426 <br /> Page 2 of 6 <br /> Piping removal, probing and sampling was described in the Preliminary Investigation and <br /> Evaluation Report, dated 26 March 1999 and prepared by AGE. <br /> 3.0. SCOPE OF WORK <br /> Based on the results of laboratory analysis of soil samples collected during previous site assessment <br /> activities, the PHS-EHD is requiring additional assessment to determine the hydrocarbon-impact to <br /> ground water. <br /> Three ground water monitoring wells will be installed at the site and soil sampling performed. The <br /> monitoring wells will subsequently be purged and sampled. Additional wells may be installed based <br /> upon findings of the outlined investigation. Tasks for the investigation of the extent of petroleum <br /> hydrocarbons in ground water at the site are described below. <br /> 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable site assessment permits will be obtained from the PHS-EHD. Prior to mobilization, the <br /> soil boring locations will be clearly marked and a utility clearance obtained through Underground <br /> Service Alert. <br /> 3.2. SOIL SAMPLE COLLECTION <br /> AGE proposes to advance three soil borings in the vicinity of the former USTs and fuel dispenser <br /> islands. Additional borings may subsequently be advanced, based upon the outlined investigation. <br /> Proposed boring locations are illustrated in Figure 2. <br /> Borings will be advanced to total depths of approximately 35 feet bsg. Soil samples will be collected <br /> from each boring at five-foot intervals beginning at 15 feet bsg at the UST location and beginning <br /> at a depth of 5 feet bsg in the remaining two borings. Field procedures for advancement of borings <br /> and collection of soil samples are presented in Sections 4.1. and 4.2. <br /> 3.3. MONITORING WELL INSTALLATION AND DEVELOPMENT <br /> Each boring will be completed as a ground water monitoring well with 20 feet of screened section <br /> installed across the observed water table level. Based on the estimated current ground water level <br /> at the site of 20 feet bsg,the total depth of the monitoring wells will be approximately 35 feet bsg. <br /> Advanced CeoEnvironmental,Inc. <br />