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Mr. Himanshu Mehta 11 July 2008 Page 2 PROJECT BACKGROUND The IRCL facility is located in southern Indian River County, east of Interstate 95 , south of Oslo Road, and west of Rangeline Road in Vero Beach, Florida. The SWDD operates both the Class I landfill and Construction and Demolition (C&D) disposal facility at the IRCL facility. The Class I landfill includes Segment 1 , Segment 2 , and an Infill Area located between Segment 1 and Segment 2 . Segment 1 is approximately 20 acres, unlined, and was initially closed in 1990 with a cover system that included & to 124n. thick compacted clay cap . Segment 2, which is approximately 38 acres in total footprint, has a 60-mil thick high-density polyethylene (HDPE) geomembrane single liner. The Infill Area has : (i) a single composite liner comprised of a 60- mil thick HDPE geomembrane placed on top of 2-ft thick compacted clay liner over a 5 -acre area between Segment 1 and Segment 2 , and (ii) a 60-mil thick textured HDPE geomembrane single liner over the 7 . 5 acres of the eastern side slopes of the closed Segment 1 landfill . Segment 2 sideslopes were capped in 1998 with a 40-mil LDPE geomembrane and 2-ft of cover soil to El . 55 ft NGVD . The Infill sideslopes currently are not capped. Leachate from the lined Segment 1 eastern side slopes, Segment 2, and Infill Area is collected through a combination of leachate collection system (LCS) drainage media and HDPE pipes, and conveyed to a pump station located at the northwest corner of Segment 2 . The leachate is then transferred through a force main to the West Regional Wastewater Treatment Plant for treatment and disposal . In June 2005 , the Florida Department of Environmental Protection (FDEP) issued the SWDD with an expansion permit, under Permit Modification No . SO31 -0128769-011 , for the disposal of C&D debris over the south and west slopes of the closed Segment 1 landfill using 3 horizontal to 1 vertical (3H : 1 V) side slope geometry. The westward top slopes of the C&D expansion would extend to elevation (El.) 129 . 5 ft National Geodetic Vertical Datum (NGVD) and grade to the east at a 5 percent slope. The Segment 2 and Infill Area were also permitted to have 3H : 1 V waste slopes from El . 55 to El . 145 ft NGVD . In August 2006, FDEP issued the SWDD with an expansion permit for placement of C&D debris over the north slope of the closed Segment 1 landfill using 3H : 1 V side slope geometry, extending the elevation to approximately 125 ft NGVD , under Permit Modification No . 5031 -0128769-013 . The C&D debris placement over the slopes of the previously-closed Segment 1 landfill, under the current FDEP Permits , is presently projected to reach final grades by March 2009 . In order to improve aesthetics at the IRCL facility, the SWDD has voluntarily elected to place cover soil and sod over portions of the C&D debris that have reached final grades in a "close- as- you-go" manner. In April 2007 , the SWDD authorized Geosyntec under Work Order No . 6 to XR08168/1 L80186.doc engineers I scientists I innovators