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• Remove all wastes, liners, and contaminated subsoils <br /> • Eliminate free liquids, stabilize remaining wastes, and <br /> cover the surface impoundment with a final cover that <br /> meets DHS standards (Title 22, California Code of <br /> Regulations, Division 4, Chapter 30, Article 26) . This <br /> may be allowed if it can be demonstrated that this <br /> alternative will not pose a significant hazard to public <br /> health and the environment. <br /> A closure plan must be approved by DHS and the RWQCB before closure <br /> can begin. <br /> Closure of TPCA impoundments is not expected to have a significant <br /> effect on the quantity of hazardous wastes generated in the County. <br /> 6.4.3 a as as <br /> Table 6-4 presents a list of Bond Expenditure Plan cleanup sites in <br /> the County under investigation by the DHS. No quantitative data for <br /> these sites are currently available. Included in Table 6-4 is a <br /> listing of the known pollutants and the status of the investigation. <br /> Based on information made available by OHS, projected quantities of <br /> other cleanup costs were estimated. Based on this information an <br /> estimated 1,018 tons of other cleanup wastes are projected for the <br /> year 2000 (Table 6-2) . These are wastes from sites other than TPCA or <br /> old disposal sites. Some are industrial facilities or sites where <br /> accidental spills have taken place. The total tonnage for each waste <br /> category was divided by 10 to put the data on an annual basis, <br /> assuming a cleanup period of 10 years (Table 6-2, Footnote 1) . This <br /> assumption was recommended in the DHS Technical Reference Manual . <br /> r_ <br /> PJ9 9390502D.00D 6-4 Rev. 1 11/08/88 <br />