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Ms Lori Duncan Page 3 the bottom of the boring to approximately 5 feet above the initial groundwater surface to accommodate water level fluctuations. Filter pack will consist of No. 3 Monterey sand from the bottom of the well to approximately 2 feet above the top of the screen. Two feet of hydrated bentonite will be placed above the sand pack The remaining annulus will be grouted with neat cement to ground surface. Surface completion will consist of a locking well cap and a traffic rated well box. Drilling and well installation will be conducted under the supervision of an experienced geologist. Soil samples will be collected at 5-foot intervals with a split spoon sampler containing clean brass liners for stratigraphic and field screening concerns using a photo ionization detector (PID) and other qualitative analysis methods. All soil samples will be classified in accordance with ASTM Designation D2488-90, which is equivalent to the Unified Soil Classification System. Depending upon field screening results,one or more soil samples will be submitted for laboratory analysis. The samples selected for analysis will be immediately capped, identified and placed in an ice chest for shipment to a state-certified laboratory under chain of custody protocol. Analysis will consist of volatile organic compounds (VOCs)and oxygenated fuel additives by EPA Method 8260. Drill cuttings and wastewater generated from field activities will be contained in appropriately labeled drums approved by the Department of Transportation. The drums will be stored on site pending laboratory results and the development of disposal options. Surveying,Well Development and Groundwater Sampling The casing elevation of the newly installed well will be surveyed to a vertical accuracy of 0.01 feet and tied into existing groundwater monitoring wells located at the adjacent Circle K site. A minimum of 24 hrs after completion, an experienced field technician will measure static depth to water and develop the well by pumping and surging until turbidity is minimized. A minimum of three casing volumes will be purged from the well. During the purging process pH, temperature, and electrical conductivity will be monitored. After pH, temperature, and electrical conductivity parameters have stabilized, and the well has recharged to a minimum of 80% of the original static water level, groundwater samples will be collected for analysis. Analysis will consist of VOCs and oxygenated fuel additives by EPA method 8260. Wastewater generated from field activities such as purging and equipment decontamination will be contained in labeled DOT approved drums. The drums will be stored on site pending laboratory results and the development of disposal options. Protocols and Safety All field activities performed at the site will be conducted in accordance with the Quality Assurance/Quality Control Plan and Site Specific Health and Safety Plan on file with PHS/EHD. Reporting Following the receipt of analytical results, a technical report describing the methods and results of this investigation will be prepared and submitted to PHS/EHD. The report will describe to the degree possible the nature and extent of groundwater contamination, and will contain recommendations for additional work as appropriate. F:\Data\GROUNDZE\NSAUTO\REPORTS\WORKPLAN-INM.doc