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4 :q <br /> v <br /> foot intervals or at changes in the lithology, field screened with a Photoionization Detection (PID) <br /> meter, and at least two soil samples from each of the six borings will be submitted for laboratory <br /> analysis. Soil sample selection will be based on lithology, 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, estimated at 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 drive <br /> point will provide a watertight system to ensure sample integrity. <br /> 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 tubing <br /> with a check valve attached to one end will be inserted down the casing until it is immersed in <br /> groundwater. Water will then be pumped through the tubing and to the ground surface by <br /> oscillating the tubing up and down. <br /> Following soil and groundwater sample collection, the borings will be backfilled with neat cement <br /> grout to the ground surface. All drill cuttings, if any, will be stored on site in a 5-gallon container <br /> pending laboratory results. <br /> Sample Analysis <br /> Selected samples will be immediately placed on ice and delivered under chain-of-custody <br /> documentation to GTEL Environmental Labs, a State-certified laboratory, for analysis. Samples <br /> will be analyzed for total petroleum hydrocarbons as gasoline (TPHg) using EPA Method 8015 <br /> Modified, benzene, toluene, ethylbenzene, and xylenes (BTE3) using EPA Method 8020, <br /> oxygenate fuel additives using EPA Method 8260, and total lead. <br /> SCOPE OF WORK - PHASE TWO <br /> Planning and Permits <br /> Based on the analytical results of soil samples collected during the tank removal in 1986, Smith <br /> Technology anticipates that soil and groundwater samples collected during Phase One of the <br /> subsurface investigation will be impacted by petroleum hydrocarbons. After analytical results <br /> from Phase One have been received, Smith Technology will complete a well permit application for <br /> the advancement of three soil borings to be completed as groundwater monitoring wells. The <br /> permit application, associated fees, and a site plan showing proposed well locations will be <br /> submitted to PHS/EHD for review and approval. Smith Technology will schedule field personnel <br /> and equipment, locate underground utilities, and perform any other necessary field preparation <br /> and job start-up activities. <br /> w:19095431reportslwkp.dm 3 <br /> • <br /> S TH <br />