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APPENDIX D <br /> BORING LOGS WITH WELL CONSTRUCTION DETAILS <br /> AND INSTALLATION PROCEDURES <br /> Recovery wells are constructed of either 4- or 6-inch-diameter, flush-threaded, Schedule 40, <br /> PVC, blank and screened (0 020-inch slot size) casing. The annular space surrounding the <br /> screened portion was backfilled with No. 3 Monterey sand (filter pack) to between 0 5 and <br /> 1 foot above the top of the screened section. A 1-foot-thick, bentonite, annular seal was <br /> placed above the filter pack and the remaining annulus was grouted with neat cement to the <br /> surface. Street-rated boxes were installed slightly above grade to minimize infiltration of <br /> surface waters. Locking, water-tight well caps were installed to ensure the integrity of the <br /> well <br />