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WASTE DISCHARGE REQUIREMENTSORDER NO. R5-2003-0020 -22- FOR COUNTY OF SAN JOAQUIN FOR CONSTRUCTION, OPERATION, CLOSURE AND EVALUATION MONITORING FOOTHILL SANITARY LANDFILL, MUNICIPAL SANITARY LANDFILL SAN JOAQUIN COUNTY The Discharger shall submit a closure and post -closure maintenance plan (or suitable modifications to a pre-existing plan) that complies with 40 CFR 258.60 and 258.61 and with Title 27 of the CCR. 2. At closure, each landfill unit shall receive a final cover consisting, at a minimum, of a two -foot thick foundation layer which may contain waste materials, overlain by a one -foot thick clay liner, and finally by a one -foot thick vegetative soil layer, or engineered equivalent as approved by the Executive officer. 3. Vegetation shall be planted and maintained over each closed landfill unit. Vegetation shall be selected to require a minimum of irrigation and maintenance and shall have a rooting depth not in excess of the vegetative layer thickness. 4. Closed landfill units shall be graded to at least a three percent grade and maintained to prevent ponding. 5. The Discharger proposes to place waste over closed Module "r' over the life of the entire landfill as each module is expanded. The Discharger shall provide, at a minimum, a settlement and static and dynamic slope stability study of the refuse and cover/liner layers as part of the Closure and Postclosure Maintenance Plan required for Corrective Action for each module expanded against Module "I," as applicable. ' ! I► H7�llill:i�h�I�►�II�.y 1. In the event the Discharger does not comply or will be unable to comply with any prohibition or limitation of this Order for any reason, the Discharger shall notify the appropriate Board office by telephone or email as soon as it or its agents have knowledge of such noncompliance or potential for noncompliance, and shall confirm this notification in writing within two weeks. The written notification shall state the nature, time, and cause of noncompliance, and shall describe the measures being taken to prevent recurrences and shall include a timetable for corrective actions. 2. The Discharger shall retain records of all monitoring information, including all calibration and maintenance records, all original strip chart recordings of continuous monitoring instrumentation, copies of all reports required by this Order, and records of all data used to complete the application for this Order. Records shall be maintained throughout the life of the facility including the postclosure period. Such legible records shall show the following for each sample: 9 a. Sample identification and the monitoring point or background monitoring point from which it was taken, along with the identity of the individual who obtained the sample;