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(YA Planning and Permits ATC has completed the soil boring permit application for the proposed subsurface investigation. The permit application and associated fees (check no. 402) are attached to this workplan (Attachment 1). Following the approval of this workplan and soil boring permit, ATC will schedule field personnel and equipment, notify Underground Services Alert to locate underground utilities as required, and perform any other necessary field preparation and job start-up activities. Installation of Soil Borines To determine the extent of impacted soil and groundwater at the site, four soil borings (SB-11 through SB-14) will be advanced at the site. Two soil borings, SB-11 and SB-12, will be advanced to first encountered water, estimated at approximately 12 feet below ground surface (bgs). Soil borings SB-13 and SB-14 will be advanced to a depth of approximately 26 feet bgs. Proposed boring locations are shown on Figure 3. The four borings will be advanced using truck mounted Geoprobe® narrow diameter, direct push technology. Drilling will be conducted by a State-licensed (C57) drilling company. A field geologist will be present to log all soil samples. Descriptions of soil types encountered and sample collection intervals will be recorded on boring logs. Soil samples will be collected at minimum of five-foot intervals or estimated changes in lithology, field screened with a Flame Ionization Detection (FID) meter. It is estimated that one soil sample from shallow borings SB-11 and SB-12 will be submitted for laboratory analysis and two soil samples from the deeper borings (SB-13 and SB-14) will be submitted for laboratory analysis. Sample selection will be based on FID measurements and field observations (i.e. odor and soil discoloration). One groundwater sample will be collected from each shallow boring at the depth groundwater is fust encountered, anticipated to be approximately 12 feet bgs, or at the completion depth of the deeper borings, anticipated to be approximately 26 feet bgs. A Geoprobes Screen Point 15 Groundwater Sampler will be threaded onto the leading end of the Geoprobe when the desired groundwater sampling depth is reached.. While the sampler is advanced, O-ring seals and an expendable drive point will provide a watertight system to ensure sample integrity. When the tool has been advanced to the desired depth, extension rods will be sent downhole to brace the bottom of the sample screen as the tool casing is retracted. When the casing is retracted, up to 41-inches of screen with slot sizes of 0.004 inches will be exposed. Teflon tubing with a check valve attached to one end will be inserted down the casing until it is immersed in groundwater. Water will then be pumped through the tubing and to the ground surface by oscillating the tubing up and down. 92054.0006\REPORTSMORKPLAN.DOC 4