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(VATC <br /> A S S O C I A T E S I N C . <br /> On April 23, 1998, an ATC geologist supervised the advancement of six soil borings to 21 feet <br /> below ground surface (bgs). Soil borings SB 1, SB2, and SB4 were placed in the vicinity of the <br /> former USTs, soil boring SB3 was placed in the vicinity of the former dispenser, and soil borings <br /> SB5 and SB6 were placed at the southern edge of the former excavation area. A site plan with <br /> soil boring locations is shown on Figure 2. Soil samples were collected from borings SBI <br /> through SB6 at five-foot intervals in acetate sampling tubes and grab groundwater samples were <br /> collected from each boring. Analytical results indicated that the selected soil samples and the grab <br /> groundwater sample from boring SB6 contained detectable concentrations of petroleum <br /> hydrocarbons. The work is summarized in ATC's Summary Report of Subsurface Investigation, <br /> dated June 17, 1998. <br /> SCOPE OF WORK <br /> Planning and„Permits <br /> ATC will perform this scope of work under the existing soil boring permit for the site. The permit <br /> application is attached to this workplan. ATC will also schedule field personnel and equipment, <br /> notify Underground Service Alert to locate underground utilities as required, and perform any <br /> other necessary field preparation and job start-up activities. <br /> Advancement of Soil Borinzs <br /> To try and evaluate the extent of impacted soil and groundwater in the vicinity of boring SB6, a <br /> minimum of three soil borings will be advanced to approximately 30 feet bgs. The proposed <br /> borings will be advanced east and south of boring S136 to try and fully delineate the lateral extent <br /> of impacted soil and groundwater. The estimated groundwater flow direction is north-northeast. <br /> If field conditions indicate that these borings are impacted then ATC will step out and advance <br /> additional borings. Proposed boring locations are shown on Figure 2. <br /> The borings will be advanced using truck mounted Geoprobe® narrow diameter, direct push <br /> 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 estimated changes in lithology, field screened with a Photoionization Detection <br /> (PID) meter, and an estimated two soil samples from each of the borings will be submitted for <br /> laboratory analysis. Soil sample selection will be based on PID measurements and field <br /> observations (i.e. odor and soil discoloration). <br /> One groundwater sample will be collected from each boring at the depth groundwater is first <br /> encountered, anticipated to be approximately 20 feet bgs. A Geoprobe® Screen Point 15 <br /> Groundwater Sampler will be threaded onto the leading end of the Geoprobe when the <br /> w:113099Veportslwkp2.d" 2 <br />