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02 July 2004 <br /> AGE-NC Project No.. 04-1168 <br /> Page 5 of 5 ' <br /> Each ground water sample will be extracted by lowering a polyethylene bailer through the hollow <br /> center of the push rods into the screen section. Samples for,TPH-g, BTEX, and fuel oxygenate <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 migratiori of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br /> 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, 196 1,Geologic Features and GroundwaterStorage.Capacityofthe <br /> Sacramento Valley, California, U.S.,Geological Survey Water Supply Paper 1497, 241p. <br /> Advanced GeoEnviron mental,Inc. ` <br />