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DEL-TECH GEOTECHNICAL SUPPORT SERVICES MONITORING WELL FIELD LOG 2003/GLOBAL I.D. #T0607700605 SAMPLE LOCATION/EW- 1 DATE: 9/25/2003 PROJECT NAME: OLIVAREZ PROPERTY ANALYSIS PERFORMED: SEE C OF C ADDRESS: 300 S. CALIFORNIA STREET SAMPLE TIME: 16:45 CITY,STATE: STOCKTON,CA. SAMPLE CONTAINERS: 4 V.O.A.'s SITE CONTACT: NONE PRESERVATIVES: HCL CONSULTANT: FOOTHILL ENG. LAB.ANALYSIS BY: SHERWOOD LABS PROJECT MANAGER IRV MONUMENT: FLUSH SAMPLER: DEL-TECH WELL CASING MATERIAL PVC SIGNED: WELL CASING DIA. : 2" / 1.456 SAMPLE MED GROUNDWATER P.I.D.READING/ODOR: N/A FUEL TOP OF CASING ELEVATION: MSL COLOR: GREY DEPTH TO WATER: (feet.l00th's) 3323 FEET CALC.PURGE VOL.: 38.98 GAL. DEPTH OF WELL: (feet.lWth's) 60.00 FEET TOTAL VOLUME PURGED: 116.93 GAL. STANDING WATER COLUMN: 26.77 FEET DEPTH OF PUMP: 58 FEET FIELD PARAMETERS TIME CUMULATIVE DRAW PUMPING pH E.C. TEMP. O.R.P. DISSOLVED TURBIDITY CASING VOLUME DOWN RATE OXYGEN COLOR PER PURGE (D.T.W.) (GPWLPM) (units) (UMHOS) (Celsius) (Mvolts) (PPM) (N.T.U.) 0 NIA 10 GPM 7.32 1236 21.7 -139 0.57 GREY 38.98 7.39 1205 21.6 -176 0.49 " 77.95 7.37 1198 21.6 -182 0.45 " 116.93 7.37 1201 21.7 -179 0.44 " PURGE METHOD: DEDICATED WATERRA PUMP. SAMPLE METHOD: DEDICATED WATERRA PUMP. D.T.W.AFTER PURGE: D.T.W.AT SAMPLE TIME: 39.13' WELL INTEGRITY: CAP&SEAL ARE SECURE. NEW LOCK INSTALLED.. WELL LOCATION: REMARKS: WEATHER: CLEAR SKIES. WIND: NW5 QUALITY CONTROL: ALL PURGING EQUIPMENTAND SAMPLING EQUIPMENT WAS CLEANED IN THE FIELD WITH A STEAMCLEANER&ALCONOX SOAP. NEW NITRILE GLOVES. CONTAINMENT: D.O.T. 17 55 GAL.STEEL DRUM OR 60 GAL POLY DR UM, INSTRUMENTATION: Y.S.I.556 MULTIPROBE SYSTEM Y.S.I.DISSOLVED OXYGEN METER SOLINIST SLOPE METER THERMODINE 5803 P.I.D. KECK INTERFACE METER TURBIDITY METER #OF DRUMS ON SIGHT: WATER: SOIL: