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DEL-TECH GEOTECHNICAL SUPPORT SERVICES ' — MONITORING WELL FIELD LOG 2006 ' SAMPLE LOCATION/MW - 7 DATE: 1122J2006 ' PROJECT NAME- GEORGE'S SERVICE ANALYSIS PERFORMED' SEE CHAIN OF CUSTODY ADDRESS 1600 DURHAM FERRY ROAD SAMPLE TIME: 1500 CITY,STATE: TRACY,CA SAMPLE CONTAINERS- 4 VOA'S ' SITE CONTACT GEORGE&MAB PRESERVATIVES HCL CONSULTANT GEOLOGICAL TECHNICS LAB ANALYSIS BY. EXCELCHEM LABS ' PROJECT MANAGER ERIC PRICE MONUMENT: FLUSH SAMPLER: DEL-TECH/DON LIGHT WELL CASING MATERIAL. PVC SIGNED WELL CASING DIA 2" / 01632 SAMPLE MEDIA: GROUNDWATER P.I.D READING/ODOR: N/A MUSTY ' TOP OF CASING ELEVATION MSL COLOR LIGHT BROWN TO CLEAR DEPTH TO WATER: (feet.100th's) 1210 FEET CALL.PURGE VOL 152 GAL DEPTH OF WELL (feet.100th's) 2140 FEET TOTAL VOLUME PURGED. 455 GAL ' STANDING WATER COLUMN 930 FEET DEPTH OF PUMP- 20 FEET FIELD PARAMETERS TIME CUMULATIVE DRAW PUMPING pH E C. TEMP. O R.P. DISSOLVED TURBIDITY CASING VOLUME DOWN RATE OXYGEN COLOR PER PURGE (DTW) (GPM/LPM) (units) (MSMHOS) (Celsius) (Mvolts) (PPM) (N T U) 0 N/A 2 GPM li 791 2410 242 315 10 LT BROWN- 152 ROWN152 DRY 791 1835 220 324 040 CLEAR ' 304 " 1, 781 1 1924 226 375 079 455 DRY 781 1767 221 392 086 PURGE METHOD HONDA CENTRIFUGAL PUMP ' SAMPLE METHOD DEDICATED WATERRA INERTIA TUBING D T W AFTER PURGE D T W AT SAMPLE TIME 16 89' WELL INTEGRITY CAP&SEAL ARE SECURE WELL LOCATION SEE SITE MAP ' REMARKS POOR RECHARGE WEATHER CLEAR SKIES I SUNNY WIND NONE ' QUALITY CONTROL ALL PURGING EQUIPME'NTAND SAMPLING EQUIPMENT WAS CLEANED IN THE FIELD WITH A STEAMCLEANER&ALCONOX SOAP NEW NITRILE GLOVES CONTAINMENT D D T 17 55 GAL STEEL DRUM OR 60 GAL.POLY DRUM ' INSTRUMENTATION Y S 1 3560 FLOWCEL L Y S I DISSOLVED OXYGEN METER SOLINIST SLOPE METER THERMODINE 5808 P I D KECK INTERFACE METER TURBIDITY METER