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WASTE DISCHARGE REQUIREMENORDER NO R5-2012-0106 .-12- GLENN SPRINGS HOLDING COMPANY, FORMER OCCIDENTAL CHEMICAL COMPANY,GROUNDWATER REMEDIATION PROJECT, LATHROP FACILITY SAN JOAQUIN COUNTY points located outside the treatment zone. The treatment zone is shown in Attachment C. Compliance points are designated in Table 3 (Attachment D) of Monitoring and Reporting Program No. R5-2012-0106. The Discharger shall develop background/baseline conditions for TDS in groundwater wells below the Corcoran Clay following the procedures found in CCR Section 20415(e)(10). The Discharger shall submit a proposal to develop the background concentrations no later than 60 days prior to commencement of injection system operation above the Corcoran clay. The Discharger shall submit a report summarizing the development of the background/baseline concentrations and a list of the proposed background/baseline values no later than 30 days prior to commencement of operation of the new injection wells screened above the Corcoran Clay. 5. At least 15 days prior to the commencement of injection system operation above the Corcoran clay, the Discharger shall submit an Operation and Maintenance (O&M) Plan for the groundwater treatment facilities. The O&M Plan shall instruct field personnel on how to manage the day-to-day discharge operations to comply with the terms and conditions of this Order and how to make field adjustments, as necessary.. A copy of the 0&M Plan shall be kept at the facility for reference by operating personnel. Key personnel shall be familiar with its contents. The O&M plan shall be modified as needed to respond to changes in system operations. 6. The Discharger shall comply with the Monitoring and Reporting Program No. R5- 2012-0106, which is part of this Order, and any revisions thereto as ordered by the Executive Officer. 7. A copy of this Order shall be maintained at the project site and be available at all times to operating personnel. 8. The Discharger shall maintain in good working order and operate as efficiently as possible any facility or control system installed by the Discharger to achieve compliance with these Waste Discharge Requirements. 9. The Discharger shall promptly report to the Central Valley Water Board any violation of this Order, material change in the character or volume of the discharge. The location of any discharge within the treatment zone (Attachment C) may be changed if needed with written agreement from the Central Valley Water Board. 10.In the event of any change in control or ownership of land-or waste discharge facilities presently owned or controlled by the Discharger, the Discharger shall notify the succeeding owner or operator of the following items by letter, in advance of the transfer of ownership or control, and a copy of the notice must be forwarded to the Central Valley Water Board: a. Existence of this Order; and