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26 February 1998 <br /> AGE-NC Project No. 97-0394 <br /> Page 4 of 4 <br /> 11. Backfill each probe boring using a concrete-bentonite slurry throughout the entire depth of <br /> the probing . <br /> 12. Selected soil samples for total petroleum hydrocarbons quantified as gasoline (TPH-g), <br /> volatile aromatic compounds (benzene,toluene, ethyl-benzene and total xylenes: BTE&X), <br /> for halogenated volatile organic hydrocarbons and pH. If field observations indicate the <br /> presence of other petroleum hydrocarbons, additional analysis may be necessary. <br /> 4.3. REPORTING <br /> A report detailing the results of the investigation will be prepared. The reportwill be in a format <br /> acceptable to the PHS-EHD and CVRWQCB. The report will be reviewed and signed by a <br /> California Registered Geologist. <br /> Advanced GeoEnvironmental,Inc. <br />