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• <br /> MONITOR WELL CONSTRUCTION <br /> MOBIL SERVICE STATION # 10-NP4 <br /> 2375 Tracy Blvd . <br /> Tracy , California <br /> MW-7 <br /> Well completed to 20 feet in depth with 2-inch , Schedule 40 PVC <br /> casing , flush-threaded ,points . Screen ( 0 . 020 inch slot) set from <br /> 20 to 4 feet . Number 6x12 and 12x20 Monterey sand placed from 20 <br /> to 3 feet . Concrete seal placed from 3 to 0 feet . <br />