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PROVEN TECHNOLOGIES AND REMEDIES GUIDANCE—REMEDIATION OF rviETALS IN SOIL 7.5 WASTE MANAGEMENT 7.5.1 Management and Profiling of Excavated Soil Contaminated soil that is excavated must be managed and disposed of as hazardous waste if it is identified as a RCRA listed or characteristic waste. If the waste is regulated under RCRA, it must be disposed of in a landfill authorized to accept RCRA hazardous waste. Soil identified as California only hazardous waste is generally disposed of in a Class I landfill. Excavated soil may either be directly hauled off site for disposal, provided arrangements have been made with a disposal facility or may be stockpiled on site for further profiling. A schematic or scaled map of the areas to be excavated and the locations where soil will be stockpiled should be included. Excavated soil should be segregated and stockpiled based on the existing site data. The stockpiles should include any of the applicable categories summarized in Table 4. Table 4. Disposal Alternatives for Excavated Soil LEVEL OF CONTAMINATION DISPOSAL ALTERNATIVES Not impacted Can remain on site and used for backfill Impacted at levels above acceptable risk Disposal at Class I or Class II landfill levels but below hazardous levels Impacted at California only hazardous levels Disposal at Class I or Class II landfill RCRA hazardous waste Stabilization before disposal at Class I landfill Temporary stockpiles should be managed in accordance with the excavation, design, and restoration plan. The plan should be prepared in compliance with the applicable requirements of the California Code of Regulations, title 22, division 4.5. The excavation, design, and restoration plan should designate the locations for placement of stockpiles, should address measures to prevent migration and/or dispersal of the soil (e.g., liners, covers), and identify the appropriate distance from the upper edge of any excavation. Composite samples should be collected and analyzed from the stockpiles to verify that the soil has been appropriately segregated. Disposal of soils will be based largely on the Land Disposal Restrictions (LDRs*). LDRs apply if the excavated soils are contaminated with a listed RCRA waste or if the contaminated soils exhibit a RCRA hazardous waste characteristic. If analytical data demonstrate that the soil is a RCRA hazardous waste, the soil must be treated to meet specific LDRs limits prior to land disposal. In addition, if the soil is a RCRA characteristic waste, all other underlying soil must meet its associated LDRs prior to disposal. If the excavated soil is below the 33