ARCHIVED REPORTS_2005_1 - Laserfiche WebLink

Home Browse Search

occasionally choose to temporarily stockpile or treat certain contaminated soils. Soils that are temporarily stockpiled are typically those that have been received at the site without the required analytical testing documentation. The soils are stockpiled until the generator provides the necessary documentation. Once the documentation is received and depending on the test results, the soils are either disposed in an appropriate WMU or removed from the site by the generator. In order for Forward to process a request for treatment or disposal of contaminated soil, the potential disposer/generator must complete a waste characterization form and a contaminated soil description form (signed by a California Registered Geologist or California Professional Engineer), and submit copies of all state-certified laboratory results for the contaminated soils. In the past, Forward has implemented programs for treating both gasoline and nonvolatile petroleum hydrocarbon contaminated soil. A brief operations summary for treatment of both of these contaminated soil types follows. Treatment of Nonvolatile Petroleum Hydrocarbon Contaminated Soil The "Operation and Maintenance Manual, Soil Treatment System, Forward, Inc., Landfill Unit WMU G, Stockton, California" (Harding Lawson Associates, April 1991) describes the treatment system for nonvolatile petroleum hydrocarbon contaminated soils. The specifications and reporting requirements of the treatment system are specified in the WDRs, Order No. 97-141 and in the October 31, 1990, letter from S)CPHS to Forward. The contaminated soil treatment system consists of an area where appropriate fertilizers are added to the contaminated soil and the soil is mechanically aerated to accelerate biodegradation of hydrocarbons (bioremediation process). The objective of the treatment process is to biodegrade the hydrocarbons to levels appropriate for landfilling. After the contaminated soils have been adequately treated, the soil can be used for daily cover, intermediate cover, or foundation layer for the closure cap. If necessary, the treated soils can be disposed in a Class II or Class III WMU. Although there are currently no Land Treatment Units (LTUs) at the site, LTUs have been constructed in the past and may be utilized in the future. LTUs for ® contaminated soil are permitted within WMU G-North or G-South. The units are Forward Landfill JTD 6-14 J.\Allied\Forward\1TD Amendment\Final JTD Amendment\JTD Sec 6 080105.doc:5/22/02 Rev.1:7/2002:Rev.2:4/2003;Rev 3:6/2003 BRYAN A.STIRRAT&.ASSOCIATES Amendment No.1:8/1/2005