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DEL-BCH GEOTECHNICAL SUPPORT SERVICES MONITORING WELL FIELD LOG 2003/GLOBAL I.D. #T0607700605 SAMPLE LOCATION/MW 8D DATE: 9/25/2003 PROJECT NAME: OLIVAREZ PROPERTY ANALYSIS PERFORMED: SEE C OF C ADDRESS: 300 S. CALIFORNIA STREET SAMPLE TIlVIE: 9:10 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" / 0.1632 SAMPLE MED GROUNDWATER P.I.D.READING/ODOR: NIA MUSTY TOP OF CASING ELE ATION: MSL COLOR: GREY DEPTH TO WATER: (feet.100th's) 36.18 FEET CALL.PURGE VOL.: 10.53 GAL. DEPTH OF WELL: (feet I00th's) 100.70 FEET TOTAL VOLUME PURGED: 31.59 GAL. STANDING WATER COLUMN: 64.52 FEET DEPTH OF PUMP: 98 FEET FIELD PARAMETERS . 77771 TIME CUMULATIVE DRAW PUMPING pH E. C. TEMP. O.R.P. DISSOLVED TURBIDITY CASING VOLUME DOWN RATE OXYGEN COLOR PER PURGE (D.T.W.) (GPMlLPM) (units) (UMHOS) (Celsius) (Mvolts) (PPM) (N.T.U.) 0 NIA 1 GPM 8.23 1641 21.6 -7 1.07 GREY 10.53 7.53 1549 21.6 -12 0.75 " 21.06 7.57 1565 21.4 -11 0.66 " 31.59 7.57 1576 21.3 -23 0.81 " PURGE METHOD: DEDICATED WATERRA PUMP, SAMPLE METHOD: DEDICATED WATERRA PUMP. D.T.W.AFTER PURGE: D.T.W.AT SAMPLE TIME: 47.22' WELL INTEGRITY: CAP&SEAL ARE SECURE. NEW LOCK INSTALLED.. WELL LOCATION: REMARKS: WEATHER: CLEAR SKIES. WIND: NW5 QUALITY CONTROL: ALL PURGING EQUIPMENT AND 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 POLYDRUM. INSTRUMENTATION: Y.S.I.556 MULTIPROBE SYSTEM Y.S.I.DISSOLVED OXYGEN METER SOLINIST SLOPE METER THERMODINE 580B P.I.D. KECK INTERFACE METER TURBIDITY METER #OF DRUMS ON SIGHT: WATER: SOIL: