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MONITORING WELL SAMPLING DATA <br />' Protect Name Stockton Maintenance Sta Project Number 58475-06-24 <br /> Well No MW-4 Date 5110102 <br /> Well Diameter 4 in Field Personnel JE <br />' Casing Length 73 04 feet Screened Casing Length <br /> Well Elevation feet MSL measured from <br />' PURGE CHARACTERISTICS <br /> Water Depth Before Purging 49 03 ft 2 in= 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 15 67 Gal Volumes Purged 3 0 <br />' Start Purging Time 1349 End Purging Time 1401 <br /> i <br /> Total Time 12 min Flow Gauge to <br /> Total Volume Pumped 47 Gal Avg Flow Rate 3 9 gpm <br /> i <br /> Water Depth After Purging feet Time <br /> SAiVIPI.,ING 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 CONDUCTIVITY pH Gallons <br /> °C (umhos/cm) Purged <br /> 1353 220 619 703 16 <br /> 1357 216 626 714 32 <br /> 1401 21 1 636 724 47 <br /> 1415 Sample <br /> 1 <br /> Comments Purge water clear, no odor <br /> Turbidity= 0 051 ntu <br />