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1 GEOMATRIX Ls Reuse of Excavated Soil L` Because this oil-affected soil dose not pose an unacceptable risk to human health or the environment, it can be reused at the site. However, oil-affected soil cannot be reused on site or L disposed of off site without prior approval by the PHS-EHD. Upon excavation of oil-affected soil, the following steps should be taken: 1) segregate and stockpile oil-affected oil on site; 2) notify the PHS-EHD; and 3) evaluate the final disposition reuse options under the guidance of the PHS-EHD. The PHS-EHD will be available to provide a timely visual inspection of the site L conditions and approve the final disposition of the oil-affected soil. This approval process is not intended to stop work during excavation; earthwork may proceed during the PHS-EHD's evaluation. Since petroleum hydrocarbon odor and crude oil residue may be present in the soil, consideration should be given to where the soil is placed. Potential reuse options include placement of the soil back into the subsurface (e.g., in trenches and other excavations) or underneath surface coverings (e.g., roads, parking areas, or other paved structures). The following guidelines are recommended: 1) if used as trench backfill, do not place oil-affected soil in contact with underground utilities; 2) do not place affected soil as backfill for excavations if geotechnical properties are insufficient; and 3) do not place shallower than 2 feet bgs unless covered by pavement. If oil-affected soil is to be used under paved surfaces (sidewalks, roads, etc.), this soil may be stockpiled along with other soils that will be used for this purpose in a single stockpile. If oil-affected soil is not reused in the subsurface or underneath surface coverings and is to be disposed of off site, the soil should be stockpiled separately from other non-oil-affected soil t, excavated at the site, and CPL should be contacted(see contact list on last page). If affected soil is disposed of off site without CPL's prior knowledge, CPL will not be responsible for any cost L or liability associated with such disposal. This document is not an acknowledgment by CPL of liability for damages, costs, or fees in any way associated with oil-affected soils. In addition, it is L important to consult with the disposal facility regarding potential restrictions for accepting petroleum hydrocarbon-affected soil. According to the San Joaquin County Air Pollution Control District, no permit to stockpile this soil is required by them. LNWPDOCS1C3499\N]CHOSMP.DOC 4 fr.,