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_ y GeoSyntec Consultants Ms . Polly Kratman Indian River County 7 June 2005 Page 2 development of rules promulgated in Chapter 62 -701 of the Florida Administrative Code (F . A . C .) . Since that time, GeoSyntec staff have continued to provide technical assistance to the Solid Waste Section of the FDEP by serving on various Technical Advisory Groups (TAGs) , including, most recently, the CCA-treated wood TAG. The remainder of this proposal presents : (i) project background ; (ii) proposed scope of work; (iii) schedule ; (iv) budget estimate ; and (iv) the assumptions which were used in the development of this proposal . PROJECT BACKGROUND The IRC SWDD operates both the Class I landfill and Construction and Demolition (C &D) disposal facility at the IRC Sanitary Landfill Facility located near Interstate 95 , Oslo Road, and Rangeline Road in southern Indian River County. The Class I landfill includes Segment 1 , Segment 2, and an Infill Area under FDEP Operations Permit No . S031 -0128769 -005 . Segment 1 is unlined and was closed in 1990 . Segment 2 is a lined Class I landfill located west of Segment 1 . The Infill Area is also a lined Class I landfill located between Segment 1 and Segment 2 . The total footprint of the Class I landfill is approximately 63 acres , with 20 acres for Segment 1 and 43 acres for Segment 2 and Infill Area. The existing Segment 1 unlined Class I landfill is closed and permitted to elevation (EL. ) 105 ft. The cover system is comprised of the following ( from bottom to top) : 12 - in. thick intermediate cover layer, 8 -in. thick compacted clay cap , 6-in . thick protective soil layer; and 4-in. thick vegetated topsoil layer. The closed landfill has 4 . 3 horizontal to 1 vertical (4 . 3H : 1 V) sideslopes with three 10- ft wide benches (or terraces) located at 15 -ft to 20- ft vertical height intervals from EL. 25 to EL. 75 ft. The IRC SWDD has proposed a lateral and vertical expansion of the existing Segment I landfill for the disposal of C &D material . The expansion of the south and west slopes would be created by shifting the final toe of slope approximately 25 ft laterally, constructing the C&D expansion with 3H : 1V sideslope geometry, and using one stormwater bench (i . e . cover drainage swale) at EL. 85 ft. The westward top of slope would extend to EL . 129 . 5 ft and grade to the east at 5 percent slope to accommodate the future Class I landfill vertical expansion. A permit application for this C &D expansion was included as part of the renewal operations permit application submitted to FDEP in July 2004 . GeoSyntec understands that the proposed C &D expansion has been approved by FDEP . XL05065UT050010-final