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File No 93342-WP Page 3 <br /> 5- Pending results by laboratory analysis, excess drilling cuttings will remain on-site and, <br /> when deemed necessary, covered with a plastic tarp Uncontaminated soils may be <br /> appropriately disposed of on-site by the client Soils found to contain levels of <br /> contaminants above local or state action levels will be placed in 55-gallon drums and left <br /> on-site for proper disposal by the client At the client's request, we will act as the client's <br /> agent by assisting the disposal of the drum-contained material <br /> Well Construction <br /> 1- Monitoring and extraction wells will be constructed with Class-A cement/bentonite grout <br /> plugs, or bentonite pellets tremied into position as a base for well casing, if necessary <br /> All screens and casings used will be in a contaminant-free condition when placed in the <br /> ground Factory flush threaded blank 2-or 4- inch diameter schedule 40 PVC well casing <br /> will be used in the construction of all wells Factory slotted casing will be used <br /> throughout the entire permeable water bearing zone encountered No thread lubrication <br /> will be used, other than teflon tape, during the connection of the blank to the slotted <br /> casing The well screen will be set within the aquifer according to the proposed function <br /> of the well and the chemistry of the potential contaminants The screen slot size will be <br /> chosen to retain a high percentage of the filter pack or natural formation The annular <br /> space of the borehole surrounding the slotted section will be filled with fresh water <br /> washed aquarium gravel or sand as a filter pack to a point at least one foot above the <br /> top of the slotted interval <br /> A seal above the filter pack will be formed by placing a one foot layer of bentonite <br /> pellets down the hole If the bentonite pellet plug is placed above the water table, it will <br /> be moistened by introducing clean water downhole Above the upper bentonite plug, a <br /> Class-A/bentonite or neat cement grout will be installed to the surface <br /> 2- The tops of all well casings will be sealed and placed in keyed locking device to <br /> prevent surface contamination, unauthorized entry, and tampering <br /> 3- Groundwater level measurements will be made to the nearest + 0 01-foot in each well <br /> ADVANCE SOIL TECHNOLOGY, INC <br />