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WASTE DISCHARGE REQUIREMENTS -6- <br />WASTE MANAGEMENT OF NORTH AMERICA INCORPORATED <br />FOOTHILL SANITARY LANDFILL INCORPORATED <br />FOOTHILL SANITARY LANDFILL FACILITY <br />CLASS III LANDFILL <br />SAN JOAQUIN COUNTY <br />13. The closure of each WMU shall be under the direct supervision of a <br />California registered civil engineer or a certified engineering <br />geologist. <br />14. 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 <br />facilities can be determined throughout the post -closure maintenance <br />period. <br />15. At closure, each WMU shall receive a final cover which is designed and <br />constructed to function with minimum maintenance and consists, at a <br />minimum, of a two -foot thick foundation layer which may contain waste, <br />overlain by a one -foot thick clay liner, and finally by a one -foot <br />thick vegetative soil layer, or an engineered equivalent final cover <br />approved by the Board pursuant to Subsections 2510(b) and (c) of <br />Subchapter 15. <br />16. Vegetation shall be planted and maintained over each closed WMU. <br />Vegetation shall be selected to require a minimum of irrigation and <br />maintenance and shall have a rooting depth not in excess of the <br />vegetative layer thickness. <br />17. Closed landfill units shall be graded to at least a three percent <br />grade..,and maintained to prevent ponding. <br />18. Areas with slopes -greater than 10 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 />I. The Discharger shall, in a timely manner, remove and relocate any <br />wastes discharged at the facility in violation of this Order. <br />2. The Discharger shall maintain a copy of this Order at the facility, <br />and make it available at all times to facility operating personnel, <br />who shall be familiar with its contents, and to regulatory agency <br />personnel. <br />3. The Discharger shall notify the Board in writing•of any proposed <br />change in ownership or responsibility for construction or operation of <br />the WMU. The Discharger shall also notify the Board of a material <br />change in the character, location or volume of the waste discharge <br />and of any proposed expansions or closure pians. This notification <br />