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' 'tea PoFZAT I Ur+ , <br /> 1 TT.ELH €aUsER , <br /> 1 F= FZ 1 1 <br /> `T U L-._- -`�— <br /> imc. ' <br /> AJITTELHAUSER • n on Road,Suite 100 <br /> corporation 2401 Crow Ca y <br /> San Ramon, California 94583 <br /> (415) 743•-0336 <br /> July 19, 1991 <br /> Mr. Harlan, Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.C. Box 2009 <br /> Stockton, CA 95201 <br /> Subject : Additional Borings and Sampling <br /> at Unocal Service Station #6348 <br /> 3788 Tracy Boulevard, Tracy, California <br /> Dear Mr. Knoll: <br /> Laboratory analysis of samples taken at the <br /> above-referenced site has ,indicated a remaining area of concern in <br /> the vicinity of Boring #B-1 . In addition, earlier work indicated <br /> that all contaminated soil was not excav ted.�when the former <br /> underground waste-oil tank was removed. <br /> I I propose to drill and sample in order to further define <br /> these areas . A driller is tentatively scheduled for doing this <br /> work on July 23rd. You have indicated to me that this can be done <br /> under the existing permit, so please let me know if you see any <br /> difficulty in our following this schedule. <br /> yK <br /> Sincerely, <br /> MITTELHAUSER Cd ORATION <br /> ef�. <br /> Marj Bushnell <br /> Projnager <br /> M1,1B/j vk <br /> 1745L4 <br /> attachment: Site Plan <br /> CHICAGO, IL SAN RAMON, CA PORT,ARTHUR, TX <br />