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Union Ice Plant Phase I & II Remedial Investigation Plan Page: 4 with concrete grout , after a bentonite seal has been placed. The boring for the monitoring well will be of - a diameter at least 4 inches greater than the 2 inch diameter of the well casing to be used . The cuttings from the drilling operation will be containerized on-site during drilling for proper disposition. The proper method of disposal will be dependent upon results of laboratory analysis . this disposal will be the responsibility of the client unless other arrangements have been made . 3.2 Well Construction All materials used in well construction will be thoroughly cleaned prior to introduction into the boring . A bentonite or cement and bentonite grout will be placed at the bottom of the boring as necessary . After the seal has been allowed to set long enough to support the weight of the casing, a 2- inch diameter well casing (stainless steel or PVC) with end cap and factory perforations for placement in the saturated zone ( taking into account seasonal variation) will be placed in the boring . The screen and filter pack sizes will be as noted in the well construction drawing. The casing and end caps will be threaded or joined by stainless steel screws , no PVC cement will be used. The filter pack will extend two feet above the perforated zone . A bentonite seal 2- to 3-feet thick will be placed in the annular space above the filter pack followed by a cement grout to the surface . Seal and filter pack elevations may change based on the underlying geology (Figure 6) . 3.3 Well Development and Sampling The well will be developed until the well water appears clear of sediment of until an appropriate number of well volumes (based upon the judgement of the responsible professional) have been evacuated . The water produced during well development will be containerized and left on-site in 55-gallon drums or other suitable containers for disposal as hazardous