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II4k <br /> AUGEAS CORPORATION <br /> ROSANNA GARRISON 799 MAIN STREET,SurrE A TELEPHONE: (415)726-7700 <br /> PRESIDENT HALF MOON BAY,.CALIFORNIA 94019 � <br /> July 24, 1992 <br /> Mr. Michael M. Collins <br /> Environmental Health Division <br /> J u L 30 1992 <br /> ENVIRONMENTAL HF-.'A!-'FHSan Joaquin County Public Health Services PERMIT/SERVICES <br /> P.Q. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Soil Boring Placement Report- Union Safe Deposit Site 7814 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 for documents 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 /> •Bluelines of the existing bank structure <br /> IIE <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 /> l <br /> ENVIRONMENTAL <br />