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MONITORING WELL SAMPLING DATA <br /> Project Name Stockton Maintenance Sta Project Number S8475-06-24D <br /> ' Well No MW-7 Date 3/18103 <br /> Well Diameter 4 in Field Personnel JE/CK <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 51 16 ft 2 in= 1632 Gal/ft 4 in = 6528 Gal/ft <br /> Calculated Water Column Volume 15 30 Gal TVolumes Purged 3 1 <br /> ' Start Purging Time 0920 End Purging Time 093 5 <br /> Total Time 15 min Flow Gauge to <br /> Total Volume Pumped 46 Gal Avg Flow Rate 3 1 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 /> 0925 207 1181 7 18 15 <br /> ' 0930 208 1197 723 30 <br /> 0935 205 1211 719 46 <br /> 0945 Sample <br /> Comments Purge water clear, no odor <br /> Turbidity= 82 ntu <br />