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17 NrM <br /> MONITORING WELL CONSTRUCTION <br /> The monitoring wells will be constructed with thread-jointed 4-inch inner diameter <br /> schedule 40 PVC casing. No chemical cements, glues, or solvents will be used in well <br /> construction. The screened portion of the wells will consist of factory-perforated 0.010 <br /> hould unconfined aquifer conditions exist then screen will <br /> inch slotted casing (screen). S <br /> be installed from the total depth of the well to approximately 5 feet above encountered <br /> ground water to allow for fluctuation of ground water levels. <br /> The annular space apposite the screen will be packed with #0 Monterey sand to <br /> a point approximately 1 foot above the sand as a seal against cement entering the sand <br /> Jus will be backfilled with neat cement to a few inches below <br /> pack, 'Be remaining annu <br /> grade. <br /> A cast-aluminum utility box with water-tight seal and PVC aproe will be placed over <br /> concrete, flush with the surrounding grade. <br /> each well head and set in <br /> MONITORING WELL SAMPLING <br /> The wells will be developed before water sampling by surge pumping or other <br /> nt, discharge water will be monitored visually for <br /> suitable method. During well developme <br /> turbidity. Well development will continue until the discharge water is clear of silt and sand <br /> temperature of the water has stabilized. Presence of formation <br /> and Ply conductivity and <br /> 7 <br />