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CVAT <br /> t <br /> ASS OC I A T E S I N C <br /> SCOPE OF WORK <br /> Plannine and Schedulin <br /> ATC has completed the necessary PHSIEHD permits for soil boring installation. The permit and <br /> associated fees are attached to this workplan. Upon approval of this workplan ATC will <br /> schedule field personnel and equipment, notify Underground Services Alert to locate <br /> underground utilities as required, and perform any other necessary field preparation and job start- <br /> up activities. <br /> Installation of Soil Borings <br /> To evaluate the extent of impacted soil and groundwater at the site, three soil borings will be <br /> advanced to first encountered groundwater, estimated at approximately 15 feet below ground <br /> surface (bgs). Proposed boring locations are shown on Figure 2. <br /> The three borings will be advanced using truck mounted Geoprobe® narrow diameter, direct <br /> push technology. Drilling will be conducted by a State-licensed (C57) drilling company. A field <br /> geologistwill 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 <br /> .five-foot intervals, field screened with a Flame Ionization Detection (FID) meter, and one soil <br /> sample from each of the borings will be submitted for laboratory analysis. Soil sample selection <br /> will be based on FID measurements and field observations(i.e. odor and soil discoloration). <br /> s. . <br /> One groundwater sample will be collected from each boring at the depth groundwater is first <br /> encountered, anticipated to be approximately 15 feet bgs. A Geoprobe® Screen Point 15 <br /> Groundwater Sampler will be threaded onto the leading end of the Geoprobe when the <br /> groundwater is encountered. While the sampler is advanced, O-ring seals and an expendable <br /> drive point will provide a watertight system to ensure sample integrity. <br /> a, When the tool has been advanced to the desired depth, extension rods will be sent downhole to <br /> brace the bottom 'of the sample screen as the tool casing is retracted. When the casing is <br /> retracted, up to 41-inches of screen with slot sizes of 0.004 inches will be exposed. Teflon <br /> f <br /> tubing with a check valve attached to one end will be inserted down the casing until it is <br /> immersed in groundwater. Water will then be pumped through the tubing and to the ground <br /> f <br /> a surface by oscillating the tubing up and down. <br /> R Following soil and groundwater sample collection, the borings will be backfilled with neat <br /> cement grout to the ground surface. All drill cuttings, if any, will be stored on-site in a 5-gallon <br /> container pending laboratory results. <br /> 4 <br /> w\25b971repoM\wkp.doe 2 <br />