2010-07-30_HYDROLOGY - M1977526 (4)

Home Browse Search

5 Operations Plan i 5.1 Types of Acceptable Materials 5.1.1 Inert Materials The types of inert materials received are listed below and only uncontaminated materials are acceptable. A more complete description of the inert materials is listed below. • soil • earth • dirt • gravel • sand • rock and rock tailings • asphalt paving fragments • concrete and concrete pieces • day-lighting mud • directional drilling muds • top soil • masonry • fly ash (to be handled as described in the addendum to this plan) The concrete received will be hardened for at least 60 days prior to acceptance, with most all concrete being types that have been in place for many years prior to removal and acceptance at the site. Only hardened asphalt fragments, typically from portions of asphalt parking lots or street replacement, will be received. 5.1.2 Fly Ash The Site will also accept fly ash under the conditions that it is mixed with soils or other suitable inert materials to provide a relatively strong solid material. Certain types of fly ash have usable pozzolanic properties and can be mixed with soils to make a strong solid base that has little leaching potential. The fly ash received at the Site will be mixed with soils according to the mix ratios as demonstrated in the geotechnical evaluation in to be provided as an addendum to this application. 5.2 Life Expectancy The useable air space for filling of approved inert materials is ± 1.5 million cubic yards. Based upon an estimated annual volume of 50,000 to 100,000 cubic yards per year, the life of the filling operation is expected to be approximately 15 to 20 years but may take up to 30 years for completion depending on local economic conditions. The filling operations will begin within a few months of obtaining all approvals. AFS Frei-Henderson Inert Fill Page 12 of 23 MOLEN & ASSOCIATES, LLC