Laserfiche WebLink
FORWARD LANDFILL <br /> NON-WATER CORRECTIVE ACTION PLAN <br /> Austin Unit <br /> The former Austin Road Sanitary Landfill, which began accepting municipal solid waste in 1954 <br /> and which, as mentioned above, does not contain a base liner or LCRS. The top of the former <br /> Austin Road Sanitary Landfill has been graded to drain to the south, and a final cover was placed <br /> on a portion of the top and on the entire original northern slope. WMUs FU-03, FU-04, FU-05, <br /> FU-06, FU-08, and FU-10 are located within the former Austin Road Sanitary Landfill. The <br /> northern portion of WMUs FU-03 to FU-08 overlies the top of the former Austin Road Sanitary <br /> Landfill. Only Class III waste is permitted to be placed above the top of the former Austin Road <br /> Sanitary Landfill. The southern portion of these WMUs, which was constructed to meet Class II <br /> (designated waste) requirements for base liners and LCRSs, is permitted to receive designated <br /> wastes. Liners are placed to separate the Class II waste in the southern portion of WMUs FU-03 <br /> to FU-10 from the Class III waste located in the former Austin Road Sanitary Landfill. <br /> Forward Landfill also includes a transfer station/materials recovery facility(MRF), soil borrow <br /> areas, composting areas, and storage and support areas. <br /> Forward Inc. is currently considering a 184-acre landfill expansion that will provide <br /> approximately 30 million cubic yards of airspace and extend the active life of the facility by 20 <br /> years. Reasonably-foreseeable release (water and non-water) scenarios for the expansion area <br /> are not presented herein, but will be included in future expansion permit application packages. <br /> 3.2 CLOSED LANDFILL AREAS <br /> Stage I of the Forward Landfill has been closed using an alternative four-foot thick monolithic <br /> (evapotranspirative) final cover system. The monolithic final cover system consists of select <br /> moisture conditioned soils derived from an on-site source that were compacted to a minimum of <br /> 90 percent of the maximum dry density to meet or exceed the maximum measured hydraulic <br /> conductivity of 1.0E-6 cm/sec. Following closure, the Stage I A area was equipped with <br /> moisture monitoring instruments (moisture content sensors and infiltration devices) and a <br /> meteorological station. Monitoring of the alternative final cover system performance has been <br /> conducted since 2006, and the results indicate that the system has superior infiltration <br /> performance when compared to the State prescriptive final cover system design(GLA, 2010). In <br /> September 2010, after four years of moisture and infiltration monitoring, the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) approved the cover design system for <br /> closure of the Stage IA area. <br /> M:12011-012MWFA REPORTMOCX 6 Geo-Logic Associates <br />