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MONITORING WELL SAMPLING DATA <br /> Protect Name Stockton Yard Project Number 58100-06-62 <br /> ' Well No MW-7 Date 10/22/96 <br /> Well Diameter 4 in Field Personnel IM/RS <br /> ' Casing Length 75 6 feet Screened Casing Length <br /> Well Elevation feet MSL measured from <br /> PURGE CHARACTERISTICS <br /> Water Depth Before Pumping 59 95 ft 2 in = 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 10 2 Gal Volumes Purged 3 <br /> ' Start Pumping Time 1223 End Pumping Time 1258 <br /> Total Time 35 min Flow Gauge 27668 to 27699 <br /> ' Total Volume Pumped 31 Gal Avg Flow Rate 0 9 gpm <br /> Water Depth After Pumping 68 06 feet Time 1258 <br /> SAMPLING CHARACTERISTICS <br /> rSampling Method disposable bailer <br /> Laboratory Analysis TPHg, TPHd, BTEX, MTBE <br /> ' TIME TEMPERATURE CONDUCTIVITY pH Gallons <br /> (°C) (umbos/cm) Purged <br /> ' 1227 207 834 69 10 <br /> 1243 206 989 69 21 <br /> 1258 21 0 902 69 31 <br /> 1315 sample <br /> ' comments dry after 13 gallons, 23 gallons <br /> drawdown = 8 11 <br /> % recovery= 60 55 =93 % <br />