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Am a <br />KLEINFELDER <br />o 1 -inch -diameter, flush threaded, Schedule 80 PVC casing. <br />o 10 -foot screen sections of Schedule 80 PVC, with 0.02 -inch, factory <br />cut slots. <br />o #2/12 Monterey Sand. <br />o Volclay, 1/2 -inch bentonite pellets. <br />Monitoring Well 1 (MW -1) was located along the north side of the landfill, <br />as shown on Figure 2. On April 27, 1988, boring B-1 was drilled to 100 <br />feet below ground level. Hydro -Search had intended to install MW -1 in <br />this boring, and set the screen section in the most saturated or coarsest <br />grained sediment encountered. Sediments encountered in this boring ranged <br />between dry and damp; therefore, the moisture content of the soil could <br />not be used as the criteria for selecting an interval to screen. Instead, <br />grain size was used to select a screen interval and a coarse sand interval <br />35 to 45 feet below ground surface was selected as the screen interval. <br />To construct MW -1 in B-1 would require backfilling the interval between <br />100 and 45 feet with grout. Constructing a monitoring well above a grout <br />layer would cause delays in Hydro -Search's field program; therefore, <br />Hydro -Search elected to drill a second boring near B-1. Hydro -Search , <br />drilled the second boring to a depth of 45 feet and installed MW -1 without`,- m <br />prior approval from FSL, Inc. Approval was later given by FSL, Inc. for <br />this change in Hydro -Search's work plan. <br />Monitoring well construction details for MW -1 are as follows: <br />' o Screen Section - 45 to 35 feet <br />o Sand Pack - 45 to 30 feet <br />o Bentonite Seal - 30 to 27 feet <br />is 104-88-683 5 <br />