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MONITORING WELL SAMPLING DATA <br /> Protect Name Stockton Maintenance Sta Project Number 58475-06-24I <br /> Well No MW-12 Date 11/19/03 <br /> Well Diameter 4 in Field Personnel JE/DW <br /> I <br /> Casing Length 82 80 feet Screened Casing Length NA <br /> Ljel�lElevation 22 82 feet above MSL <br /> PURGE CHARACTERISTICS <br /> Water Depth Before Purging 54 28 ft 2 in= 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 18 61 Gal Volumes Purged 3 0 <br /> Start Purging Time 1122 End Purging Time 1147 <br /> Total Time 25 min Flow Gauge to <br /> Total Volume Pumped 56 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/cm) Purged <br /> 1130 20 1 987 741 19 <br /> 1139 201 1007 734 38 <br /> 1147 199 1033 736 56 <br /> 1150 Sample <br /> Comments Purge water clear <br /> Well cap needs replacement <br /> Turbidity= 25 ntu <br />