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r <br /> v <br /> ATC <br /> A S S O C I A T E S I N C . <br /> On November 14, 1997, a geologist from ATC Associates supervised the advancement of two <br /> soil borings to 30 feet below ground surface (bgs). Soil samples were collected at five-foot <br /> intervals and each soil sample was field screened with a Photoionization Detector (PID) for the <br /> presence of volatile organic compounds. Petroleum hydrocarbons were observed during field <br /> activities in borings SBI and SB2 beginning at depths of 24 feet and 19 feet bgs, respectively. <br /> Analytical results of soil samples indicated the presence of petroleum hydrocarbons. <br /> One groundwater sample was collected from each boring at the depth groundwater was first <br /> encountered, approximately 30 feet bgs. Groundwater samples were placed on ice and delivered <br /> under chain-of-custody documentation to State-certified AEN laboratory for chemical analysis. <br /> Groundwater samples indicated the presence of petroleum hydrocarbons. Field activities are <br /> summarized in ATC's Summary Report, Subsurface Investigation, dated January 14, 1998. <br /> SCOPE OF WORK <br /> Planning and Permits <br /> ATC has completed the soil boring permit application for the proposed subsurface investigation. <br /> The permit application is attached to this workplan. ATC proposes to use the same C57 licensed <br /> driller as was used in the original investigation and therefore a permit fee is not included. ATC <br /> will also schedule field personnel and equipment, notify Underground Service Alert to locate <br /> underground utilities as required, and perform any other necessary field preparation and job start- <br /> up activities. <br /> Advancement of Soil Borings <br /> To determine the extent of impacted soil and groundwater at the site, three soil borings will be <br /> advanced to approximately 30 feet below ground surface (bgs). The borings will be placed <br /> outside the excavation area of the former UST and previous soil boring locations. Proposed <br /> boring locations are shown on Figure 2. <br /> The three borings will be advanced to using truck mounted GeoprobeO narrow diameter, direct <br /> push technology. Drilling will be conducted by a State-licensed (C57) drilling company. A field <br /> geologist will be present to log all soil samples. Descriptions of soil types encountered and <br /> sample collection intervals will be recorded on boring logs. Soil samples will be collected at five <br /> foot intervals or significant changes in lithology, field screened with a PID meter, and at least two <br /> soil samples from each of the borings will be submitted for laboratory analysis. Soil sample <br /> selection will be based on PID measurements and field observations (i.e. odor and soil <br /> discoloration). <br /> One groundwater sample will be collected from each boring at the depth groundwater is first <br /> encountered, approximately 30 feet bgs. A Geoprobe0 Screen Point 15 Groundwater Sampler <br /> will be threaded onto the leading end of the Geoprobe when the groundwater is encountered. <br /> wA14981\reports\wkp2.doc 2 <br />