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AS BUILT CONSTRUCTION REPORT FOR THE ASH PIT MONOFILL EXPANSION The ash monofill at the Forward Inc. Landfill is designed to expand vertically upwards, eventually tying into the foundation layer of the landfill's final closure cap. The following construction report -describes the construction of the initial phase of construction of the expansion berm along the southern boundary of the ash pit and Phases 1 and 2 of construction along the eastern separation berm. All aspects of construction were performed in accordance with the standards of CCR Title 23, Subchapter 15. 0 VERTICAL BERM CONSTRUCTION ' • The expansion berm located along the eastern boundary of the ash pit separates solid waste and asbestos disposal operations from the ash monofill disposal operation. During the late summer and fall months of 1990, two phases of expansion were constructed along the eastern berm. The initial phase of construction, beginning at an elevation of approximately 41 feet above mean sea level (msl) and extending to elevation of about 50 feet was conducted in August 1990. The second phase took place in October 1990 and resulted in a final elevation of about 58 feet msl. Phase I Expansion - The existing tern berm was scarified and a three foot wide by two foot deep anchor trench was cut into the top of the berm. A roll of Petromat Type II was placed the anchor trench and extended to the west over the berm and into the ash pit's existing sidewall leachate collection system. This material, consisting of a sheet of impermeable high .density polyethylene (HDPE) with filter fabric secured to both upper ' and lower sides of the HDPE core, was used because it can be securely held between layers of compacted soil. The material is impermeable and will direct any liquids moving down the expansion berm /ash contact into the existing sidewall leachate collection system in the ash pit. 1