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G C D '.J i J ENV/RONMENTAL . TECHNOLOG/ES 3.1 Type I Soils: WDR-Approved Class III Disposal Soils These are non -hazardous soils, as defined by Title 22 of CCR, and non -designated wastes, which contain below designated concentrations of chemicals in the soil. Designated levels have been specified for metals, petroleum, and soils contaminated with polynuclear aromatic compounds (PNAs) at the landfill. For metal -contaminated soils, the WDR specifies an extractable metal constituent below that determined by the standard California State Waste Extraction Tests of Section66700 of Title 22, and a modified WET using deionized wa r in place of citrate buffer. 7_ � S In the WDR, aerated soils contaminated with petroleum hydrocarbons containing less than a total petroleum hydrocarbon (TPH) concentration of 100 ppm can be accepted for disposal in WMUs B, C, D, or H (future). ^ ° ..r Based on discussions with DOHS, and subsequent concurrence by the RWQCB, Forward can, in the interim, accept for disposal in the Class III WMUs contaminated soil containing less than i ! • , •` 1 • 0' - •• • -r ignitableThese are non -hazardous soils that may be designated waste, according to the designated was methodology, but have been listed as acceptable at the landfill by the RWQCB in WDR 89-1 or as a consent issue. An example of such waste is petroleum -affected soil containing belo hazardous levels, but above designated levels, of any of its constituents. Petroleum -affected soi that are neither •toxice1as non-hazardous,accordance l.:. Flammability tests (using EPA Method 1010) and fish bioassay tests (using California Fish a t aquatic t be conducted to determine whether such petroleum s• non -hazardous. Common types of petroleum products include gasoline, diesel, jet fuel, kerosene, motor oil, lubricating oil, and fuel oil. However, these petroleum hydrocarbon soils have to be verified as non -hazardous and not containing hazardous compounds. 3.3 Type III Soils: Contaminant -Specific Class III Disposal Soils F, These are non -hazardous and non -designated waste that require the determination of contaminant - specific designated levels by either RWQCB criteria or by Forward Landfill site-specific studies through leachability test and attenuation factor estimation. The determination of the designated level for a specific type of contaminant for the WMUs at the Forward landfill will be in accordance with the procedure specified in the guidance document titled "The Designated Level 6 7255 Saroni Drive •Oakland.Colifornia,USA 94611 TEL (415) 339-1543 • FAX (415) 339- 6775