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10 October 1999 <br /> AGE-NC Project No. 99-0559 <br /> Page 2 of 8 <br /> 2.2. PRELIMINARY SUBSURFACE INVESTIGATION <br /> On 19 October 1998 five soil probe borings were advanced at the site using a Geoprobe soil probing <br /> unit. Soil and grab ground water samples were collected and analyzed for petroleum hydrocarbon <br /> impact. TPH-d and methyl tert-butyl ether (MTBE) were detected in grab ground water samples <br /> from the site. Additionally, TPH-d was detected in a soil sample collected from boring Bl at five <br /> feet below surface grade (bsg). <br /> In a letter dated 4 August 1999, PHS-EHD directed further site investigation to determine the extent <br /> of ground water contamination at the site. PHS-EHD specifically stated that monitoring wells would <br /> be required to obtain a constant and repeatable ground water sampling source. <br /> 3.0. SCOPE OF WORK <br /> Based on the laboratory results from the soil probe sampling, an unauthorized release of petroleum <br /> hydrocarbon compounds and fuel constituents appears to have occurred at the site. AGE proposes <br /> the installation of three ground water monitoring wells for the utilization of repeatable sampling <br /> events. Additionally, soil and grab ground water samples will be collected during the soil boring <br /> advancement. The proposed phase of work will consist of the following tasks: <br /> • Permitting and pre-field work activities; <br /> • Soil sample collection and analysis; <br /> • In-situ ground water collection and analysis; <br /> • Monitoring well installation and sampling; and <br /> • Report preparation. <br /> 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable permits will be obtained from the PHS-EHD. Additionally, a site-specific Health and <br /> Safety Plan will be prepared. Prior to mobilization. each soil boring location will be clearly marked <br /> and a utility clearance obtained through Underground Service Alert. The PHS-EHD will be <br /> contacted 48 hours prior to conducting investigation activities. <br /> Advanced GeoEnti ironmenlal,Inc. <br />