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t <br /> NMTAL AFFAIRS <br /> KAPREALIAN ENGINEERING, INC• OPERAONS DEPARTMEME <br /> K E Consulting Engineers MAY 8 X989, <br /> P. O. BOX 913 <br /> BENICIA, CA 94510 <br /> (415) 676-9100 (707) 746-6915 <br /> KEI-P88-0810 <br /> May 5, 1989 <br /> Mobil Oil Corporation <br /> 3800 West Alameda Ave. , Suite 700 <br /> Burbank, CA 91505-4331 <br /> Attention: Mr. David Noe <br /> RE: Response to Regulatory Agency Comments MAY 181989 <br /> in Proposed Work Plan for <br /> Former Mobil Bulk Plant ENVIRONMENTAL HEALTH <br /> 500 E. Grantline Road PERMIT/SERVICES <br /> Tracy, California <br /> Dear Mr. Noe: <br /> This letter addresses the comments of the Regional Water Quality <br /> Control Board (RWQCB) , Central Valley Region, related to the <br /> proposed work plan for the former Mobil Bulk Plant in Tracy, <br /> �.. California, San Joaquin County. <br /> The response to the RWQCB' s comments are presented in Parts I and <br /> II of this letter. The alphanumeric designations for the <br /> responses correspond to those in the RWQCB letter dated April 17, <br /> 1989 . The proposed work plan is also attached. <br /> BACKGROUND <br /> The bulk plant site occupies about 145 feet by 145 feet in Tracy. <br /> The Location Map and Site Plan are attached. A chronology of <br /> site assessment by Kaprealian Engineering, Inc. (KEI) since <br /> April, 1986 is also attached. <br /> III. RESPONSE TO RW CB COMMENTS <br /> Comment No. 1: <br /> The extent of soil contamination was conducted on February <br /> 16, 1989. KEI collected 24 soil samples from twelve (12) <br /> locations. The samples were taken at five and ten foot <br /> depths at each location. The detail of the soil survey is <br /> described in KEI 's report P88-0810 dated March 20, 1989. <br /> The report delineates the extent of soil contamination at <br /> the site. <br />