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6.2 LANDFILL MOISTURE ABSORPTION REAGENT In some cases, Fly Ash can be used for reducing the moisture content of semi-solid or liquid waste before landfilling. Landfill operators refer to this material as a "reagent". The requirements associated with this application are typically described in the landfill's Waste Discharge Requirements (WDR) Order issued by the Regional Water Quality Control Board. DTES will coordinate with the designated Landfills to ensure the Ash is acceptable for transport and reuse in accordance with the Landfill's WDR, prior to delivery (part of sub process 7.0 — Application through Auditing). 6.3 BULKING MATERIAL Fly Ash can be combined with a variety of materials to improve their consistency, remove excess moisture, and add bulk to improve their handling characteristics. These materials are manures (dairy and poultry), grape pumice, and sewer sludge. When utilized as a bulking material, the fraction of Fly Ash added to the total mix will be documented before blending. Once blended, the material can then be used as soil stabilizer, road and construction material, or landfill alternative daily cover. 6.4 ROAD AND CONSTRUCTION MATERIAL Fly Ash and Bottom Ash in construction are acceptable alternatives for use in structural fills, pavement bases, concrete, road sub-base stabilization, stabilizing backfills, and metal casting alloys. These uses are governed by acceptability criteria established by the American Society for Testing and Materials (ASTM). 6.5 LANDFILLING/ALTERNATIVE DAILY COVER/LANDFILL CONSTRUCTION MATERIAL There are some situations where Fly Ash is a convenient and economical material, by itself or in combination with other materials, for landfills to use as alternate daily cover or in landfill construction. In these uses, the Fly Ash will be tested and approved by the landfill operator per its applicable regulation. Fly Ash may at times be disposed of in landfills permitted to accept such materials. There are some situations where Bottom Ash is a convenient and economical material, by itself or in combination with other materials, for landfills to use for landfill construction or for use as an alternative daily cover. In these uses, the Bottom Ash will be tested and approved by the landfill operator per its applicable regulation. Bottom Ash may at times be disposed of in landfills permitted to accept such materials. 16