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Drilling Monitoring 'Wells. Protocols <br /> All downhole equipment will be decontaminated using steam,to <br /> clean off all soil prior to use. Wells will be drilled with a <br /> continuous flight hollow stem auger. All wells will have a <br /> diameter at least 4 inches greater than the casing diameter <br />' (OD) . <br /> Prior to removing any equipment from the hole the TD will be <br /> measured. Once the casing is placed in the hole an accurate <br /> measurement of the total amount of casing must be made. The <br /> difference between the two figures will be explained by the well <br />' logger. <br /> All drill cuttings will be placed in drums, sealed and the <br /> drilling intervals for the cuttings in each drum will be written <br />' on the drum. <br /> Completion: <br />' Slotted casing (0.02 inch slots) will be capped with a bottom <br /> plug. The slots will extend 5 feet above the estimated water <br /> table indicated during drilling. Clean # 3 sand will be placed <br /> opposite the slotted casing and 2 feet above the last slot. At <br /> this time the well will be surged for 10 to 1.5 minutes to <br /> attempt to eliminate any voids in the sand pack. At the end of <br />' the surging the top of the sand will be measured and additional <br /> sand will be added if necessary. Directly above the sand a 3 <br /> foot plug of bentonite will be placed. Above the plug a seal of <br /> cement grout will be placed to the surface. The top of the <br />' casing will be capped and a traffic box and will be cemented in <br /> place around and above the top of the casing. <br /> The well will be developed by bailing within a day of drilling <br /> to remove most of the sediment within the casing and to remove <br /> bridging fines within the slots and sand pack. This will be done by <br />' surging using the well water if possible, if not then only <br /> potable water may be used. A log of the amount of introduced water <br /> will be kept and its use will be kept to a minimum. Bailing and <br /> surging will continue until the water does not contain any fine <br />' silt and or clay. <br />' All purged water will be stored in drums, the drums will be <br /> sealed and left on site until the condition of the water is <br /> assessed. <br /> Sampling Protocol: <br /> Soil <br /> Page 20 <br />