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Due to the use of these various materials and their ability to cover the received waste different refuse-to-cover ratios are applicable to meet performance standards equivalent to that soil cover. For purposes of this JTD the following refuse-to-cover ratios will be established and Forward Inc. will monitor operations to achieve these ratios: Soil with Tars 6:1 Clean and Contaminated Soil 4:1 Shredded Tires 4:1 PGM 2.5:1 Com ostable Material 2.5:1 Treated Auto Shredder Residue 2.5:1 C&D Inert Material 2.5:1 Ash and Cement Kiln Dust 2.5:1 Predominately Forward Inc. utilizes soil (both clean and contaminated), PGM and TASR Based on the refuse to cover ratios listed above Forward Inc. will use an effective refuse-to-cover ratio of 4:1 for purposes of calculating the landfill's remaining capacity and site life. In addition, the remaining waste capacity and site life are reviewed annually by Forward Inc. and are required to be updated in accordance with 27 CCR, Section 21640, in conjunction with a review of the solid waste facilities permit every five years. 4.56 SITE CAPACITY As previously discussed, the disposal area footprint consists of approximately 387.8 acres. The total site capacity is based on the difference between the estimated subgrade excavation and the final disposal area contours. The total remaining airspace for the Forward Landfill, as of}artFebruary 29992005, is 51,040,00032,338,460 cy. Appendix C presents information regarding air space, final, intermediate and daily cover requirements and remaining refuse capacity. The remaining ea-p site life is projected to fnid june 2002 when ,ti„ based on a refuse to soil volume ratio of 64:1 and a refuse density of 1,740 pounds per cy). The site capacity calculations reflecting this information are included in Appendix C. Forward Landfill JTD 4-11 J:\Allied\ForwardUTD Amendment\final JTD Amendment\JTD Rev Sec 4 080105.doc:05/24/02 Amendment No. 1: 8/1/2005