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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2008-0148 -27- LAWRENCE LIVERMORE NATIONAL SECURITY, LLC AND THE U.S. DEPARTMENT OF ENERGY FOR LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 SAN JOAQUIN AND ALAMEDA COUNTIES system discharges, upon request of the Executive Officer the Discharger shall submit to the Regional Water Board for review and concurrence a feasibility study proposing remedial alternatives to restore beneficial uses to the groundwater. The feasibility study shall include a schedule for completing the work, which shall become a part of this Order. The Discharger shall include a proposal for implementing a source control program and BPT to reduce pollutants in the discharge. The Regional Water Board may reopen this Order to include additional requirements resulting from the above submitted studies. 11 .If the State issues a general permit to control discharges from on-site wastewater treatment systems (e.g. septic systems), this Order may be reopened to incorporate appropriate provisions and technical standards to make the regulation of on-site wastewater treatment systems at Site 300 consistent with the State requirements. 12.The Discharger shall notify Regional Water Board staff at least 30 days in advance of changing chemical additives to cooling tower water used for corrosion and biological control to receive approval from Regional Water Board staff of the change. The notification shall include an evaluation of any potential impact to groundwater quality posed by the use of the new treatments. 13.The Discharger shall notify Regional Water Board staff at least 30 days in advance of any proposed changes to the processes or mechanical equipment which may affect mechanical equipment discharge quality. The notification shall include an evaluation of any potential impact to groundwater quality posed by the changes. 14.The Discharger shall notify the Regional Water Board of plans to close a waste management unit and submit a closure plan 45 days prior to closure. Field activities for closure shall not take place until the closure plan is approved by Regional Water Board staff. 15.The Discharger shall notify the Regional Water Board of any overflow from a mechanical equipment or cooling tower percolation pit within 2 days of the overflow. Notification shall include a description of the affected area, the cause of the overflow, containment methods and a plan to assure that overflow will not occur in the future. 16.The Discharger shall notify the Regional Water Board within 24-hours of any overflow from mechanical equipment or cooling tower percolation pits that reaches a surface water drainage course. Notification shall include a description of the affected area, the cause of the overflow, containment