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MONITORING WELL SAMPLING DATA <br />' Project Name Stockton Maintenance Sta Project Number 58475-06-24 <br />' Well No MW-11 Date 5/10/02 <br /> Well Diameter 4 to Field Personnel JE <br /> Casing Length feet Screened Casing Length <br /> Well Elevation feet MSL measured from <br /> ' PURGE CHARACTERISTICS <br /> ' Water Depth Before Purging 48 63 ft 2 in= 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 19 17 Gal Tyolumes Purged 3 0 <br /> ' Start Purging Time 1129 End Purging Time 1144 <br /> Total Time 15 min Flow Gauge to <br /> ' Total Volume Pumped 58 Gal Avg Flow Rate 3 8 gpm <br /> Water Depth After Purging feet Time <br /> SAM[PLIlNG CHARACTERISTICS <br /> ' Purging Method Submersible Pump Sampling Method Disposable Bailer <br /> Laboratory Analysis TPHg, TPHd, BTEX, 5 FOCs by EPA Test Method 8260 <br /> TIME TEMPERATURE I CONDUCTIVITY pH Gallons <br /> (°C) (umhos/cm) Purged <br /> 1134 221 633 708 19 <br /> ' 1139 217 626 710 38 <br /> 1144 21 3 627 7 13 58 <br /> 1055 Sample <br /> Comments Purge water clear,no odor <br /> Turbidity=-021 ntu <br />