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Noe <br /> AUGEAS CORPORATION <br /> RosANNA GARRisON 799 MAIN STREET*,SuTrE A TELEPHONE: (415)726-7700 <br /> PRESIDENT HALF MOON BAY,CALIFORNIA 94019 <br /> July 24, 1992 <br /> AUG 0 6 1992 <br /> Mr. Michael M. Collins ENVIRUNMENTAL HEALTH <br /> PERMIT/SERVICE$ <br /> Environmental Health Division <br /> San Joaquin County Public Health Services <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Soil Boring Placement Report- Union Safe Deposit Site 7810 Thornton Road, Stockton, CA <br /> Dear Mr. Collins: <br /> This letter will explain Augeas Corporation's rationale for the selection of soil boring locations on the Union Safe <br /> Deposit Site, located at 1710 Thornton Road in Stockton. <br /> On June 22, 1990, a representative of Augeas Corporation visited the Stockton Building Department to search <br /> historical archives fordocuments revealing the exact location of the former underground storage tanks at the subject <br /> property. Augeas Corporation was informed by the Building Department that although the former gas station's <br /> permit number was on record,the actual plans were misplaced and never transferred onto microfilm.Because these <br /> plans were unavailable, boring placement was based upon the following documentation: <br /> -Aerial photographs of the former service station <br /> •BIuelines of the existing bank structure <br /> -Diagram of tank locations- Fire Prevention District tank removal permit <br /> An aerial photograph dated April 16, 1982 was obtained from Geonex of Sacramento.The bluelines of the existing <br /> bank structure were provided to Augeas Corporation by Leslie Trotter of Union Safe Deposit.The photograph was <br /> copied onto regular paper and enlarged to the same scale as bluelines of the existing bank structure. The two <br /> ENVIRONMENTAL ANDENGINEERING <br />