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DEL-TECH GEOTECHNICAL SUPPORT SERVICES MONITORING WELL FIELD LOG 2004/GLOBAL LD. # T0607700605 52, SAMPLE LOCATION/MW' 8S DATE: 12/16/2004 PROJECT NAME: OLIVAREZ PROPER'T'Y ANALYSIS PERFORMED: SEE C OF C ADDRESS: 300 S.CALIFORNIA STREET SAMPLE TIME: 10:22 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 ERV MONUMENT: FLUSH SAMPLER: DEL-TECH/DON LIGHT WELL CASING MATERIAL PVC SIGNED: ' WELL CASING DIA.: 2" / 0.1632 SAMPLE MEDIA: GROUNDWATER P.I.D.READING/ODOR: NIA MUSTY TOP OF CASING ELEVATION: MSLLCALC. OR: GREY TO CLEAR DEPTH TO WATER: feet100th's 38.57 FEET PURGE VOL.: 4.20 GAL.DEPTH OF WELL: feet100th's 64.30 FEETAL VOLUME PURGED: 12.60 GAL. STANDING WATER COLUMN: 25.7'3 FEETH OF PUMP: 62 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. (GPM/IRM) units) (UMBOS) (Caiaiva) (Mvolts) (PPM) (N.T.U. 0 N/A .5 GPM 7.40 1712 19.4 -255 0.35 GREY 4.20 so7.39 1798 19.9 -253 0.34 it 8.40 " " 7.33 1812 20.3 -246 0.29 CLEAR 12.60 7.30 1839 20.5 -222 0.27 " PURGE METHOD: DEDICATED WATERRA PUMP. SAMPLE METHOD: DEDICATED WATERRA PUMP. D.T.W.AFTER PURGE: D.T.W.AT.SAMPLE TIME: 39.72' WELL INTEGRITY: CAP&SEAL ARE SECURE. LOCK INSTALLED. WELL LOCATION- REMARKS: WEATHER: COLD/OVERCAST. WIND: NW5 QUALITY CONTROL: ALL PURGING E UIPMENT 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. iKECK INTERFACE METER TURBIDITY METER �I