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MONITORING WELL SAMPLING DATA <br /> Project Narne Stockton Yard [—Project Number 58100-06-11B <br /> ' Well no MW-4 Date 02/05/96 <br /> Well Diameter 4 in Field Personnel BL/DW <br /> Casing Length 74 feet Screened Casing Length 15 fl: <br /> Well Elevation feet MSL measured from <br /> PURGE CHARACTERISTICS <br /> Water Depth Before Pumping 62 81 ft 2 in = 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 7 3 Gal Volumes Purged 3 <br /> ' Start Pumping Time 1443 End Pumping rime 1457 <br /> I otal I rare 14 min Flow Gauge 20315 to 20337 <br /> Total Volume Pumped 22 Gal Avg Flow Rate 1 6 gpm <br /> Water Depth After Pumping 66 01 feet Trine 1500 <br /> SAMPLING CHARACTERISTICS <br />' Sampling Method Disposable Bailer <br /> Laboratory Analysis TPHg/BTEX/MTBE/TPHd <br />' TIME TEMPERATURE I CONDUCTIVITY pH Gallons <br /> Purged <br /> 1448 763 876 7 <br /> 1452 762 886 14 <br /> 1456 798 864 21 <br />' comments Water is clear, no odor,good recharge <br /> 63 45 @ 1510= 80% recovery <br /> 1 <br />