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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2010-0016 SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS NORTH COUNTY LANDFILL SAN JOAQUIN COUNTY Closure Cost Estimate ($)2 Cumulative Filled (yd 3). % Capacity Minimum Required Fund Balance ($) Actual Fund Balance ($) 5,608,551 14,006,200 5,240,928 ---3 25.3 ---3 819,768 ---3 1,715,813 ---3 -18- 1. Based on September 2008 demonstration to CIWMB. 2. After issuance of Solid Waste Facilities Permit by LEA authorizing vertical expansion. 3. As updated annually in closure F/A demonstration to CIWMB. Provision H.5.a of these WDRs requires that the Discharger maintain closure financial assurances in at least the amount of the minimum balance required by the CIWMB. Postclosure 67. The Discharger is required to demonstrate F/A for postclosure maintenance to the CIWMB pursuant to Section 22212(b), since the landfill operated after January 1, 1988. The total estimated annual cost for postclosure maintenance and monitoring provided in the FCPMP after vertical expansion of the landfill, including 20% contingency, is approximately $596,300 in 2008 dollars (see Finding 64). The estimated 30 -year cost for landfill postclosure activities, including 20% contingency, is $17,859,000 in 2008 dollars. Provision E.25.b requires that the Discharger provide updated cost estimates, as necessary under these WDRs, for postclosure maintenance and monitoring, while Provision H.5.b requires that the Discharger provide and maintain updated F/As to the CIWMB in the amount of such updated cost estimates, as approved by the Regional Water Board. 68. In 1993, the CIWMB approved a Pledge of Revenue Agreement (No. 93-605) proposed by the Discharger as the postclosure F/A mechanism per Section 22228 to cover the estimated annual cost of landfill postclosure maintenance and monitoring. This agreement is still in effect. 69. The Discharger is required to demonstrate F/A for third party corrective action to the CIWMB pursuant to Title 27 Section 22220(b), since the landfill operated after July 1, 1991. Title 27 Section 22221(a) requires that such corrective action funding be sufficient to address a known or reasonably foreseeable release, as approved by the Regional Water Board. In October 2008, Regional Water Board staff approved an estimate of $1,520,265 in 2008 dollars submitted by the Discharger for corrective action F/As, based on costs necessary to address VOC impacts to groundwater from a reasonably foreseeable release of LFG from the landfill. In January 2009, the CIWMB approved the corrective action F/As mechanism (a Pledge of Revenue) provided by the Discharger. v