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MONITORING WELL SAMPLING DATA <br /> Project Name Stockton Maintenance Sta Project Number 58475-06-24K <br />' Well No MW-4 Date 5127104 <br /> Well Diameter 4 in Field Personnel JE/DW <br /> ICasing Length 73 04 feet Screened Casing Length NA <br /> Well Elevation 21 98 feet above MSL <br /> PURGE CHARACTERISTICS <br />' Water Depth Before Purging 52 50 ft T- 2 in = 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 13 41 Gal TVolumes Purged 3 1 <br /> Start Purging Time 1102 End Purging Time 1121 <br /> Total Time 19 mm Flow Gauge to <br /> 1 Total Volume Pumped 41 Gal Avg Flow Rate 2 2 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) (umhos/em) Purged <br /> 1108 217 1077 789 14 <br /> 1115 210 1075 800 28 <br /> 1121 213 1076 783 41 <br /> 1125 Sample <br />' Comments Purge water clear,no odor <br /> Turbidity= 38 ntu <br />