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k r OFAFF ---- A. AV Working To Restore Nature 1710 Main Street � � 2: Escalon, CA 95320 (coo P,\f, Phone: (209) 838-3507 FAX: (209) 838-3509 August 31, 1993 Mr. Robert Evans CA Regional Water Quality Control Board 3443 Routier Rd., Suite A Sacramento, CA 95827-3098 RE: Workplan for Aquifer Pumping Test, Well Installation and Well Destruction at Southwest Hide Company Facility, 11651 Palm Lane, Manteca, California Dear Mr. Evans: At the request of Southwest Hide Company, RESNA Industries, Inc. (RESNA) has prepared this workplan for submittal to the California Regional Water Quality Control Board (RWQCB) to conduct an aquifer pumping test at the above referenced site (Figure 1). The purpose of this test is to obtain aquifer characteristic data needed to develop the Groundwater Monitoring and Remedial Action Plan (GWRAP). A GWRAP must be submitted to the RWQCB as mandated by Waste Discharge Requirements Order No. 92-077. RESNA has also prepared a workplan for the destruction of two existing groundwater monitoring wells and the installation of a replacement monitoring well. As stated in the November 20, 1992, "Final Closure Plan for Class 11 Surface Impoundments"prepared by RESNA, two wells are in danger of being damaged during closure activities. These wells, wells 1 and 2, will be properly abandoned. Well 1 will be replaced with another well located just outside the cap and well 2 will not be replaced due to its proximity to well 19 (Figure 2). The following paragraphs contain the proposed workscope to be completed and a projected time schedule for completion of the work at Southwest Hide Company's Manteca facility. PURPOSE AND PROPOSED WORKSCOPE The purpose of the aquifer pumping test is to obtain aquifer characteristic data necessary to develop a GWRAP and two wells in danger of being damaged will be abandoned and a WP-0893.FNL