ARCHIVED REPORTS_2006 - Laserfiche WebLink

Home Browse Search

FO ARD P.O.Box 6336 1145 W.Charter Way•Stockton,CA 325p6 INCORPORATED (209)466-4482•(800)204-4242•FAX(209)466-1067 May 2, 2006 Mr. Robert McClellon, Supervising RENS San Joaquin County Environmental Health Department 304 East Weber Avenue, Third Floor Stockton, California 95202 RE: Forward Landfill, Remaining Site Life Estimates Dear Robert: This responds to your request for an explanation of the change in the estimated site life for Forward Landfill. To respond to your request, this letter discusses the following subjects: • _ Factors Affecting Landfill Site Life Estimates • Summary of Forward Landfill Airspace and Site Life Estimates • Conclusions Regarding Forward Landfill Site Life Factors Affecting Landfill Site Life Estimates There are two main factors that affect landfill site life estimates. These are: • Estimated Remaining Airspace • Projected Rate of Future Airspace Consumption The estimated remaining airspace, at any given point in time, provides the "starting point" for the site life estimate. To complete the site life estimate, one uses the projected rate of future airspace consumption to estimate the time (or site life) required to fill the remaining airspace. Frequently, this is done by using a table, similar to Table 8 of the Forward Landfill JTD. One should note that both of the above factors will change as the landfill develops (i.e., fills) and operations evolve. Any given site life estimate that uses either a different (or new) estimate of remaining airspace, or a different (or new) projected rate of future airspace consumption will differ from previous estimates. Therefore, estimated site life will change over the life of a landfill. Summary of Forward Landfill Airspace and Site Life Estimates The current design for Forward Landfill was prepared as part of the Joint Technical Document (JTD) issued originally in May 2002. This JTD was prepared to support (1) MAY V 5 JL, reCYCIedoaoel