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i WASTE DISCHARGE REQUIREMENTS ORDER NO , 7 THE BURLINGTON NORTHERN AND SANTA FE RAILWAY COMPANY BNSF STOCKTON INTERMODAL FACILITY SAN JOAQUIN COUNTY depth of the fluid in any LCRS sump shall be kept at the minimum needed for safe pump operation . 17 . Any direct-line discharge to a surface impoundment shall have fail - safe equipment or operating procedures to prevent overfilling. 18 . The surface impoundment shall be designed, constructed and maintained to prevent scouring and/or erosion of the liners and other containment features at points of discharge to the impoundments and by wave action at the water line . 19 . Leachate removed from a surface impoundment ' s primary LCRS shall be discharged to the impoundment from which it originated . 20 . Leachate generation by a surface impoundment to the primary LCRS shall not exceed design requirements . If leachate generation exceeds this value, then the Discharger shall immediately cease the discharge of waste, excluding leachate, to the impoundment and shall notify the Board in writing within seven days . Notification shall include a timetable for remedial action to repair the upper liner to the impoundment or other action necessary to reduce leachate production. 15 . If leachate is detected in the VZMS of a surface impoundment indicating a leak in both the primary and secondary liners the Discharger shall : a. Immediately cease discharge of waste, excluding leachate to the surface impoundment until the leaks can be found and repaired, b . report to the RWQCB that the primary and secondary liners have failed within 72 hours , c . submit written notification of the release to the RWQCB within seven days, the notification should include a time schedule to repair the primary and secondary liners , and d. discharge of wastes to the surface impoundment will not resume until the RWQCB has determined that repairs to the liners are complete and there is no further threat to water quality. 16 . Solids that accumulate in the surface impoundments shall be periodically removed to maintain minimum freeboard requirements and to maintain sufficient capacity for surface impoundment leachate and for the discharge of wastes . Prior to removal of these solids , sufficient samples shall be taken for their characterization and classification pursuant to Article 2 , Subchapter 2 , Chapter 3 , Division 2 of Title 27 . The rationale for the sampling protocol used, the results of this sampling, and a rationale for classification of the solids shall be submitted to Board staff for review. 17 . Leachate generation by a surface impoundment LCRS shall not exceed 85 % of the design capacity of (a) the LCRS , or (b) the sump pump . If leachate generation I i I