COMPLIANCE INFO_1991-1997 - Laserfiche WebLink

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Mr. Stephen Chen MAR 0 6 1995 Page 2 scenario, it would appear that a substantial portion of the landfill will require partial closure within two years. 3. Submit maps of the solid waste landfill to meet 14 CCR 18261.3(a)(1). The maps submitted do not clearly showing the existing and proposed final limits of waste placement in accordance with a closure implementation schedule. The map must clearly show property boundaries, general location, all on-site structures, entry roads, structures within 1000 -feet of the property, current monitoring and control systems, total acreage, total acres permitted, and existing and proposed final limits of waste placement. 4. All maps and drawings must be submitted as standard size (24" x 36") and include translucent reproducibles (14 CCR 18268). 5. Provide testing information to justify the on-site borrow material sources. Otherwise, general off-site borrow sources must be described. The final cover closure cost of $2.75 per cubic yard (placement, grading, and compaction) appears too low, especially if an offsite borrow source or bentonite additives are required. Please also note that page 7 states that the final cover barrier layer will be clay compacted to a permeability of 0.0000001 cm/sec or less (1 X 10'' cm/sec). 6. Does the final cover design address Subtitle D requirements? If geomembrane lined cells are included, the minimum prescriptive final cover must include a geomembrane component. Guidance for Subtitle D final cover design configurations is contained in: U.S. EPA, November 1993, Solid Waste Disposal Facility Criteria Technical AVIanual, EPA530-R-93-017, NTIS Publication PB94-100-450. State requirements under 14 CCR Article 7.8 and 23 CCR Chapter 15 impose in addition to Subtitle D, a minimum thickness of 1 -foot for the vegetative layer and a 2 -foot earthen or appropriate waste layer acting as a foundation for the .final cover. Alternative final cover designs can be proposed but must have adequate justification for approval in the Preliminary Plans. 7. Provide current descriptions of drainage controls and gas control measures. A current description of all monitoring and control systems at the landfill must be submitted [14 CCR 18261.3(a)(4)]. 8. The Preliminary Plans do not address gas control as required by 14 CCR 18261.3. If gas control measures constructed during the operational life of the landfill will address the closure standards of 14 CCR 17783, the Preliminary Plans should state so. Otherwise, closure cost estimates must be included to provide for gas control measures upon closure.