ARCHIVED REPORTS_1988_4 - Laserfiche WebLink

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In 1965 the site was expanded by 33.74 acres (Currently designated as APN 253-03-06, See Appendix F) to include the current site area which is located on APN 253-03-06 and 253-03- 05. In 1966 Interstate Route 580 .was constructed through old portions of the site. The waste within the California Department of Transportation right-of-way was removed and landfilled on older portions of the site to the northeast. Documentation on this waste removal is contained in Appendix G. From the mid-1960 's through 1970 the landfill not only accepted municipal solid waste but also accepted some Class I and II wastes (according to pre-Subchapter 15 Classification system) . Documentation of site operations during the early 1970's, contained in a RWQCB and LEA correspondence included as Appendix H, indicates the site was receiving drilling muds, liquids and hazardous waste drums. Landfill reports reviewed indicate that sewage sludge was received at the site until February 1987. Liquids received at the site until June 1987 consisted of grease trap pumpings. Since then the site has only accepted Class III waste. The landfill has primarily operated as a cut and cover operation. Since the mid-1960's, large trenches were excavated, filled with waste, and covered with the excavated soils. Operations were upgraded in the early 1980's to include the use of a landfill compactor. Landfilling of the last remaining pit, which began in 1986, continues today. As a result, cover soil is no longer available on site and is being imported for operations. B. Current type o yp f landfill operation. The current landfill operation involves the filling of the last pit on-site, which was excavated for past cut and cover operations. Dry weather operations involve the building of cells across the bottom of the pit in layers. Wet weather operations are conducted on top of previous landfilled areas to the north of the pit. Solid waste is delivered to the site in refuse trucks and private vehicles. These vehicles are directed to an unloading area where the waste is deposited by site users. The waste is then pushed and compacted in the active landfill cell by compaction equipment. At the end of the day, the waste is covered with a minimum of 6 inches of cover soil. Landfilled areas, which will not be covered by subsequent landfilling for at least 180 days receive a minimum of 12 inches of cover soil (intermediate cover) . The Operations Plan for the site, dated August 1988, hereinafter referred to as Operations Plan, (contained as Appendix D to the 11