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WASTE DISCHARGE REQUIREMENTS -16- CITY OF STOCKTON REGIONAL WATER QUALITY CONTROL PLANT SAN JOAQUIN COUNTY objective is adopted by the State Water Resources Control Board, this Order may be reopened and a limitation based on that objective included. 4. The Discharger shall not allow pollutant-free wastewater to be discharged into the collection, treatment, and disposal system in amounts that significantly diminish the system's capability to comply with this Order. Pollutant-free wastewater means rainfall, ground water, cooling waters, and condensates that are essentially free of pollutants. The Discharger shall submit a plan to limit the discharge of pollutant-free water within 90 days of adoption of this Order for approval by the Executive Officer. 5. The Discharger shall operate the siphon discharge shutoff to minimize chlorine discharges to the extent technically and operationally feasible. The Discharger shall report the duration and magnitude of all residual chlorine concentrations greater than zero in accordance with Monitoring and Reporting Program No. 94-324. 6. The Discharger shall operate the pH control system, and the siphon discharge shutoff, to prevent excursions outside the range of 6.0-8.5 to the extent it is operationally feasible. 7. The Discharger shall submit a plan to evaluate compliance with effluent and receiving water limitations B.7, E.8, and E.9, by 1 December 1995, for approval by the Executive Officer. 8. If the Discharge intends to use reclaimed water for additional specific uses beyond those described in Finding 30, it shall first submit a written report demonstrating, to the satisfaction of the Executive Officer, that the uses will be in compliance with the terms of this Order. 9. The Discharger shall use the best practicable cost-effective control technique currently available to limit mineralization to no more than a reasonable increment. The Discharger shall submit a plan to limit mineralization by 1 July 1995 for approval by the Executive Officer. 10. The Discharger shall comply with all pretreatment requirements contained in 40 CFR Part 403 and shall be subject to enforcement actions, penalties, fines and other remedies by EPA or other appropriate parties, as provided in the Clean Water Act, as amended. The Discharger shall implement and en.arce its approved Pretreatment Program. EPA may initiate enforcement action against an industrial user for noncompliance with applicable standards and requirements as provided in the Clean Water Act. 11. The Discharger shall enforce the requirements promulgated under Sections 307(b), (c), (d), and 402(b) of the Clean Water Act. The Discharger shall cause industrial users subject to federal categorical standards to achieve compliance no later than the date specified in those requirements or, in the case of a new industrial user, upon commencement of the discharge.