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AW <br /> 001 <br /> MITTELHAUSER <br /> corporation 2401 Crow Canyon Road, Suite 100 <br /> San Ramon, California 94583 <br /> (415) 743-0335 <br /> July 19, 1991 <br /> Mr. Harlan Knoll -- <br /> Tye" <br /> I <br /> San Joaquin County PubliC Health Services <br /> Envitonmental 'aHealth Division 1:1A <br /> P .O. Box 2009 71" <br /> Stockton, CX 95201 <br /> Subject : Additional Borings and Sampling <br /> at Unocal Service Station #6348 <br /> 3788 Tracy Boulevard, Tracy, California <br /> Dear Mr . KEoli : <br /> Laboratory analysis of samples taken at the <br /> above-referencet site has incinated a remaining area of concerp in <br /> the vicinity of Boring &-i . in addition, earlier work indicated <br /> that all contaminated sOil was not excavated when the former <br /> =derarvood waste-oil tank was removed. <br /> 1 PrQwse vc drill and sample , <br /> n order to further definE <br /> theLe Lress . A driller is tentatively scheduled far Wing nnic <br /> work an j. ly 23rd. You have indi=ied to mq Lhat this can he 6jne <br /> undat the exiSLinq permit, so please let Yu know if see ..:Ly <br /> YfflOWLY in our Fol lcVng this schedule . <br /> Sincerely, <br /> M1TTLLH1iUSE1P, <br /> Play jpr e JV Bushnell <br /> F -00A Manager <br /> AL4. <br /> Lttawhment : Site plal: <br /> CHICAGO, IL SAN RAMON, CA PORT ARTHUR, TX <br />