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WASTE DISCHARGE REQUIRA6s UNIVERSITY OF CALIFORNIA LABORATORY i1 CLASS 11-1 SOLID WASTE DISPOSAL ALAMEDA AND SAN JOAQUIN COUNTIES 5. The exterior surfaces of all the disposal areas shall be graded to promote lateral runoff or precipitation d to prevent ponding. 6. Annually, prior to the anticipated rainfall period, all necessary runoff diversion channels shall be is place to prevent erosion or flooding of the sites. 7. During the winter months when precipitation can be expected, impervious covers (permeability 10-6 /sec or less) shall be maintained over all but the active area for disposal. The disposal activity shall be confined to the smallest area possible based upon anticipated quantity of waste and operational procedures. S. Waste materials shall not be discharged on any surface which is excavated 25 feet below adjacent natural round surface. 9. Excavations made for discharge of wastes shall not extend 25 feet below . adjacent ground surface. 10. Liquids shall not be discharged solid wastes at these sites. Water used during disposal site operations shall be limited to a minimal amount reason- ably necessary for dust control purposes. Liquid wastes may be discharged to separate ponding or spreading, areas only if the specific wastes, manner, and place of disposal are approved by the Executive Officer. 11. All wells located within the disposal area shall be sealed to the satisfac- tion of the San Joaquin County Health Department prior to discharging waste materials within 100 -feet of any such veils'. 12. The discharger shall remove and relocate any wastes which are discharged at this site in violation of these requirements. 13. Existing discharges not in compliance with Specification 3.3 shall be removed or protected from the 100 -year frequency flood according to a time schedule contained in a report which shall be submitted by 15 February 1981. C. Provisions: 1. University of California, Lawrence Livermore National Laboratory Site 300 . shall maintain and post a copy of this order at the site so as to be available at all times to site operating personnel. 2. The discharger shall file with this Board a report of any material change or proposed change in the character, location, or quantity of this waste discharge. For the purpose of these requirements, this includes any pro- posed change in boundaries, contours, nature of the waste, or ownership of the disposal area. Amended CHW/Es 12/5/80