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MONITORING WELL SAMPLING DATA <br /> iProject Name Stockton Yard Project Number S8I00-06.1 I <br /> I Well no MW-12 Date 02/05/96 <br /> Well Diameter 4 in Field Personnel DW/BL <br /> ' <br /> Casing Length 80 feet Screened Casing Length 20 ft <br /> Well Elevation feet MSL measured from <br /> ' PURGE CHARACTERISTICS <br /> I Water Depth Before Pumping 63 50 ft 2 in = 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 10 5 Gal Volumes Purged 5 <br /> ' Start Pumping Time 1 110 End Pumping Tame 1130 <br /> Total Time 20 man Flow Gauge 20051 to 20105 <br /> Total Volume Pumped 54 Gal Avg Flow Rate 2 7 gpm <br /> Water Depth Ager Pumping 63 50 feet Time 1130 <br /> SAMPLING CHARACTERISTICS <br /> ISampling Method Disposable Bailer <br /> Laboratory Analysis TPHg/BTEX/MTBE/TPHd <br /> I TIME TEMPERATURE'' CONDUCTIVITY pH Gallons <br /> Purged' <br /> 1115 687 1131 18 <br /> 1 121 685 1006 36 <br /> 1130 686 1244 54 <br /> I <br /> 1 135 sample <br /> I <br />' comments Water is very turbid, water clearing after 35 gallons, no odor, good recharge <br /> no drawdown 100% recovery <br />