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MONITORING WELL SAMPLING DATA <br />' Project Name Stockton Maintenance Sta Project Number S8475-06-24 <br />' Well No MW-12 Date 5/10/02 <br /> Well Diameter 4 in Field Personnel JE <br />' Casing Length 82 80 feet Screened Casing Length <br /> Well Elevation feet MSL measured from <br />' PURGE CHARACTERIS'T'ICS <br /> Water Depth Before Purging 48 53 ft 2 in= 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 21 97 Gal Volumes Purged 3 0 <br />' Start Purging Time 0837 End Purging Time 0853 <br /> Total Time 16 min Flow Gauge to <br />' Total Volume Pumped 66 Gal Avg Flow Rate 4 1 gpm <br /> Water Depth After Purging feet Time <br /> SAMPLING CHARACTERISTICS <br /> ' Purging Method Submersible Pump 11 Sampling Method Disposable Bailer <br /> Laboratory Analysis TPHg, TPHd,BTEX, 5 FOCs by EPA Test Method 8260 <br /> ' TIME TEMPERATURE CONDUCTIVITY pH Gallons <br /> (°C) (umbos/cm) Purged <br /> 0842 188 689 7 19 22 <br /> ' 0847 196 707 710 44 <br /> 0853 200 710 706 66 <br /> 0905 Sample <br /> Comments Duplicate <br /> 1 <br /> LT:u:r:bidity= -018 n t u <br />