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��•. - i yc' ' Kr.: .' j - •nTY..{tyr^s••F4?Go.Tt!'�Y�t[7^a�_:+,� a3a: nom'.: '1!:: 4' i > 'Y+C•'t^'(e (r-'� ° c .....`,i �c•> = 5 '=t 4rtgi L4f !iiti + , n+htr i-`GTt',-t s ??�` _ .^ .;� itis -. Q ,`se K y. Tia }, 1� ti_j li.�k �_. �t•t Indian River County Landfill Modification of Permit No. 8031-245825 3) Bubgrade Preparations Prior to infill liner installation, the subgrade shall be prepared to provide a firm unyielding foundation and if necessary, the bass shall be brought up to grade by placement and compaction of fill material. The fill material and subgrade shall not contain rocks, roots, debris, shells or other materials which could penetrate the liner material. 4) Bottom Liners The bottom liner system for the lateral expansion area shall be a single composite liner consisting of 24 inches of 1 X 10-7 cm./sec. clay overlain by a 60 -mil textured High Density Polyethylene (HDPE) geomembrane. The Leachate Collection and Removal System (LCRS) shall consist of 24 inches of 1 X 10-3 cm./sec. drainage sand and leachate collection piping placed on the liner in accordance with the design drawings. 5) Bideslooe Liners The sideslope liner to be installed on the eastern aideslope of existing Segment I shall be double -side textured 60 -mil, HDPE with a maximum permeability of 1.0 X 10-7 cm./sec. 6) $elect Waste Over Liner System: Select waste containing neither non-compressible items nor sharp objects shall be used for the initial 4 to 10 foot thick layer of waste over the liner system. 7) 'Final Covers The layering from the top to the geomembrane shall be Bahia grass sod, 6 inches of topsoil, 18 inches of common fill, a geotextile, a geonet, and the geomembrane. The geomembrane will be 40 -mil Linear Low Density Polyethylene Oeomembrane (LLDPE) with a minimum permeability of 1 X 10-7 cm./sec. 8) Construction ouality Aeeurpnce (COAL plan: The Construction Assurance (CQA) Plan submitted with theQuality installing and testing the liner system and related application shall 11 be followed for ents. The CQA engineer or his designee shall be on-site at all times during construction of the liner systems to monitor the construction activities including both the subbase and the placement of the soil drainage layer over the liner to ensure the underlying geosynthetics are not damaged during construction. 9) Liner installation - Summary Report: A registered engineer qualified to practice in Florida shall supervise and evaluate the liner installation quality assurance/quality control program to ensure that the liner meets design specifications. Upon completion, the engineer shall submit a summary report to the Department as to the complete conformity to the plans and specifications as approved. This summary report shall include a documented control program of the liner installation, liner inspections and the quality assurance/quality control testing procedures and laboratory analyses. This report shall be included with the certification required in Specific Condition 18. 10) viper Installatipn - Department Notification: Installation of the liner shall be performed by an experienced installer who has installed similar type materials. The permittee shall notify the Department at least 10 days prior to any liner installation work. 11) Seament X Eastern Sideelone Cradinos The eastern sideslops of Segment I shall be graded to raconteur the existing terraces to an outward slope not steeper than 6H:1V. 1 1 1 j D