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r <br /> MONITORING WELL INSTALLATION PROCEDURES <br /> AND BORING LOGS WITH CONSTRUCTION DETAILS <br /> Monitoring Well AW-9 was constructed using 6-inch-diameter, flush-threaded, Schedule 40, <br /> polyvinyl chloride (PVC), blank and screened (0.010-inch slot size) casing. The annular <br /> space surrounding the screened portion was backfilled with No. 2/16 Monterey sand (filter <br /> pack) to approximately 2 feet above the top of the screened section. A 1.5-foot-thick, <br /> bentonite, annular seal was placed above the filter pack and the remaining annulus grouted <br /> with neat cement to the surface. A street-rated utility box was installed slightly above grade <br /> to minimize infiltration of surface waters. A locking, watertight well cap was installed to <br /> ensure well integrity. <br /> i <br /> ! <br /> 4 <br /> f <br /> k <br /> I� <br /> t <br />