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�z <br /> STATE OF CALIFORNIA-Environmental Protallk Agency PETE WILSON, Gov rnow <br /> CALIFORNIA REGIONAL WAT"M QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Router Road,Su@e A <br /> Sacramento,CA 95827-3098 --— <br /> PHONE:(916)255.3000 <br /> FAX:(916)255-3015 <br /> 23 October 1995 <br /> Mr. Jon Weiss <br /> Libbey-Owens-Ford Co. ' <br /> P. O. Box 128 <br /> Lathrop, CA 95330 <br /> HYDRAULIC OIL GROUND WATER PLUME DEFINITION,WAREROOM AREA, <br /> LIBBEY-OWENS-FORD (LOF) COMPANY, SAN JOAQUIN COUNTY <br /> We have reviewed the 1995 third quarter monitoring report for the wareroom area at your facility in <br /> Lathrop, San Joaquin County. The monitoring report shows that hydraulic oil has been consistently <br /> detected for three consecutive quarters in monitoring well E-1 since monitoring began in December <br /> 1994. <br /> As you know, the Board's 27 June 1994 letter requested LOF to install additional monitoring wells to <br /> define the extent of the hydraulic oil contamination in ground water. In response, LOF requested that <br /> definition of the contamination be postponed until after completion of four quarters of monitoring. This <br /> approach would allow confirmation of the contamination and definition of the ground flow direction and <br /> gradient. Although staff agreed to this approach, it is evident that after three quarters of monitoring, the <br /> ground water is contaminated by hydraulic oil and the ground water flows to the southeast. Thus, LOF <br /> need not await the fourth quarter results to formulate the w6rk plan. By 1 December 1995, we request <br /> that you submit a work plan to define the hydraulic oil contamination in ground water and evaluate <br /> alternatives to remediate the ground water contamination. <br /> If you have any questions, you may call me at (916) 255-3049:--- <br /> PHILIP <br /> 55-3049: -PHILIP S. ISORENA <br /> Associate Engineer ` <br /> PSI:psi _.._ <br /> cc: Ms. Diane Hinson, San Joaquin County Public Health Services <br /> Mr. Robert Job, Condor Earth Technologies, Turlock <br /> Attachment 2 <br />