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06 December 2004 <br /> AGE-NC Project No.04-1238 <br /> Page 6 of 6 <br /> analyses will be collected into laboratory-supplied, 40-m1 volatile organic analysis (VOA) vials <br /> containing 0.5-m1 of hydrochloric acid as sample preservative. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br /> transported under chain-of-custody procedure to a DHS-certified laboratory.Each sample container <br /> will be labeled with the boring designation, time, date and sampler's initials. <br /> 4.4. EQUIPMENT DECONTAMINATION <br /> Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. All probing rods will be cleaned prior to <br /> advancement at each probe boring location. <br /> 4.5. BORING ABANDONMENT <br /> All probe borings will be permanently sealed to prevent vertical migration ofpotential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement utilizing a tremie pipe from the <br /> total depth to surface grade. <br /> 5.0 REFERENCES <br /> California Division of Mines and Geology, 1981. Regional Geologic Map Series, Sacramento <br /> Quadrangle. <br /> Olmsted, F.H., and G.H. Davis, 1961, Geologic Features and Ground Water Storage Capacity of <br /> the Sacramento Valley, California,U.S.Geological Survey Water Supply Paper 1497,241p. <br /> Advanced GeoEnvironmental,Inc. <br />