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MONITORING WELL SAMPLING DATA <br /> 5Protect Name Stockton Maintenance Sta Project Number S8475-06-24K <br /> J1 <br />' Well No MW-7 Date 05/27/04 <br /> Well Diameter 4 in Field Personnel JE/DW <br /> Casing Length 74 61 feet Screened Casing Length NA <br /> Well Elevation 21 75 feet above MSL <br /> PURGE CHARACTERISTICS <br />' Water Depth Before Purging 52 03 ft 2 in = 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 14 74 Gal Volumes Purged 3 1 <br /> LStart Purging Time 0906 End Purging Time 0925 <br /> Total Time 19 min Flow Gauge to <br /> Total Volume Pumped 45 Gal Avg Flow Rate 2 4 gpm <br /> Water Depth After Purging feet Time <br /> SANTLING CHARACTERISTICS <br /> 1 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 /> 0912 21 1 1117 765 15 <br /> 0919 201 1138 7 88 30 <br /> 0925 202 1150 781 45 <br /> 0930 Sample <br /> Comments Purge water clear, no odor <br />' Turbidity=37 ntu <br />