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`./ Saw, <br /> Ultramar <br /> Ultramar Inc. Telecopy: 209-584-6113 Credit&Wholesale <br /> P.O.Box 466 209-583-3330 Administrative <br /> 525 W.Third Street 209-583-3302 Information Services <br /> Hanford,CA 93232-0466 209-583-3358 Accounting <br /> (209)582-0241 <br /> March 30, 1993 <br /> Ms. orio Margaret La <br /> g 9 �- <br /> Environmental Health Department <br /> County of San Joaquin <br /> 445 North San Joaquin Road <br /> Stockton, California 95201 <br /> SUBJECT: BEACON STATION NO. 492, 470 NORTH MAIN, MANTECA, CALIFORNIA <br /> Dear Ms. Lagorio: <br /> This letter is in response to your letter dated February 17, 1993, which <br /> requested additional information prior to your office's evaluation for site <br /> closure. Your information request dealt with current and prior soil and water <br /> management for the project and specific technical questions. <br /> San Joaquin County Public Health Services requested the disposition "of the <br /> disposal of development water and purged water be provided." <br /> All development and monitoring well purge water collected from the <br /> above-referenced site since approximately 1990 has been hauled by Kern Vacuum <br /> Service under non-hazardous manifest back to our Hanford refinery facilities <br /> for recycling. As a general practice, prior to 1990, purge water was hauled to <br /> the H & H facility in San Francisco, also for recycling. <br /> San Joaquin County Public Health Services requested "documentation of the <br /> disposal of soil from MW 4" and "documentation of the disposal of the soil from <br /> the confirmation soil borings drilled October 8, 1992 and the soil from the <br /> installation of monitoring wells MW 1, MW 2 and MW 3". <br /> The clean soil associated with installation of MW-4 was transported to a <br /> private residence for fill material and the clean soil associated with the <br /> confirmation borings was hauled to the Sacramento County landfill for <br /> disposal . Enclosed are copies of the lab results and bills for the <br /> transportation of the subject soil . It is unknown where the soil associated <br /> with the installation of any other wells at the site was disposed of, but it <br /> wasn't uncommon for soil generated during that time frame to be transported to <br /> Chemical Waste Management in Kettleman City, California. <br /> BEACON <br /> A Member of the Ultramar Group of Companies #1 Quality and Service <br />