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1 <br /> MONITORING WELL, SAMPLING DATA <br /> Protect Name Stockton Maintenance Sta Project Number 58475-06-24D <br />' Well No MW-12 Date 3/I8/03 <br /> Well Diameter 4 in Field Personnel JE/CK <br />' Casing Length 82 80 feet Screened Casing Length NA <br /> i <br /> Well Elevation 22 82 feet above MSL <br /> PURGE CHARACTERISTICS <br />' Water Depth Before Purging 52 02 ft 2 in= 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 20 09 Gal :]—volumes Purged 3 0 <br />' Start Purging Time 0948 End Purging Time 1018 <br /> Total Time 30 min Flow Gauge to <br />' Total Volume Pumped 61 Gal Avg Flow Rate 2 0 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 /> i <br /> TIME TEMPERATURE CONDUCTIVITY pH Gallons <br /> °C {umbos/cm} Purged <br /> 0958 199 1225 725 20 <br />' 1008 203 1237 7 15 40 <br /> 1018 207 1261 718 61 <br /> 1025 Sample <br /> Comments Clear <br /> Turbidity= 23 ntu <br />