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WASTE DISCHARGE REQUIREMENTS FOR <br />SAN JOAQUIN COUNTY AND THE CITY OF TRACY <br />CORRAL HOLLOW SANITARY LANDFILL <br />CLASS III LANDFILL <br />SAN JOAQUIN COUNTY <br />Page 6 <br />10. The closure of each WMU shall be under the direct supervision of a <br />California registered civil engineer or certified engineering geologist. <br />11. Closed WMUs shall be provided with at least two permanent monuments, <br />installed by a licensed land surveyor, from which the location and <br />elevation of all wastes, containment structures, and monitoring facilities <br />can be determined throughout the post -closure maintenance period. <br />12. At closure, each landfill unit shall receive a final cover which is <br />designed and constructed to function with minimum maintenance and <br />consists, at a minimum, of a two -foot thick foundation layer which may <br />contain waste materials, overlain by a, _one -foot thickclayliner, and <br />finally by a one -foot thick vegetative soil layer, or an engineered <br />equivalent final cover approved by the Board pursuant to Subsections <br />2510(b) and (c) of Subchapter 15. <br />13. Vegetation shall be planted and maintained over each closed landfill <br />unit. Vegetation shall be selected to require a minimum of irrigation <br />and maintenance and shall have a rooting depth not in excess of the <br />vegetative layer thickness. <br />14. Closed landfill units shall be graded to at least a three -percent (351a) <br />grade and maintained to prevent ponding. <br />15. Areas with slopes greater than ten percent, surface drainage courses, <br />and areas subject to erosion by wind or water shall be designed and <br />constructed to prevent such erosion. <br />C. Provisions: <br />1. The Discharger shall, in a timely manner, remove and relocate any wastes <br />discharged this facility in violation of this Order. <br />2. The Discharger shall maintain a copy of this Order at the facility and <br />make it available at all times to facility operating personnel, who shall <br />be familiar with its contents, and to regulatory agency personnel. <br />3. The Discharger shall notify the Board in writing ofanyproposed change <br />in ownership or responsibility for construction or operation of the WMUs. <br />The Discharger shall also notify the Board of a material change in the <br />character, location, or volume of the waste discharge and of any proposed <br />expansions or closure plans. This notification shall be given 90 days <br />prior to the effective date of the change and shall be accompanied by <br />