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MONITORING WELL SAMPLING DATA <br /> Project Name Stockton Yard Project Number 58100-06-62 <br /> o� � <br /> Well No MW-5 Date 711196 <br /> Well Diameter 4 to Field Personnel IM/RS <br /> Casing Length 74 5 feet Screened Casing Length <br /> Well Elevation feet MSL measured from <br /> PURGE CHARACTERISTICS <br /> Water Depth Before Pumping 59 84 ft 2 in = 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 9 6 Gal Volumes Purged 3 <br /> Start Pumping Time 1038-1050 End Pumping Time 1135-1156 <br /> Total Time 33 min Flow Gauge 23760/23815 to 23772/23827 <br /> Total Volume Pumped 24 Gal Avg Flow Rate 0 7 gpm <br /> Water Depth After Pumping 71 78 feet Time 1159 <br /> SAMPLING CHARACTERISTICS <br /> Sampling Method disposable bailer <br /> Laboratory Analysis TPHg,TPHd,BTEX, MTBE <br /> TIME TEMPERATURE CONDUCTIVITY pH Gallons <br /> (°F) (umbos/cm) Purged <br /> 1048 829 322 871 9 <br /> 1134 790 543 648 18 <br /> 1156 774 502 658 24 <br /> 1230 sample <br /> ' comments purged dry after 12 gallons, 20 gallons and 24 gallons <br /> drawdown = 1194 <br /> % recovery=62 22= 80% <br />