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Chapter 7 RE-USE OF 'DESIGNATED WASTES' <br /> Under the Subchapter 15 regulations.7 disposal at a Class I or Class 11 waste management <br /> unit is not the only option for the discharge of a waste which has been classified as <br /> 'designated'. Exemptions listed in§2511 of the regulations permit the re-use of a <br /> 'designated waste', provided that the use does not threaten to degrade water quality. A <br /> waste-,use-,and site-specific evaluation must be made to determine whether waste <br /> constituents would be available in concentrations that could cause water quality,goals to be <br /> exceeded and beneficial uses to be impaired. <br /> 7.1 Soil Amendments <br /> §2511(f)permits the reuse of a waste as a soil amendment under certain conditions. Re- <br /> use as a soil amendment may provide a lower cost alternative to Class I or Class II disposal <br /> for such wastes as sewage treatment sludges and incinerator ashes. A waste that contains <br /> constituents in excess of Designated Levels may still be used for this purpose provided that <br /> the following conditions are met: <br /> 1) the waste is not 'hazardous'; <br /> 2) loading rates of the waste to the soil are such that constituent concentrations in soils <br /> remain below Designated Levels for the site (i e, the resulting concentrations in soil <br /> will not pose a threat to ground or surface water quality) and below levels which <br /> would be in)urious to plants or crops or, through plant uptake,to consumers of crops <br /> from the site, <br /> 3) waste application is controlled to prevent direct constituent release to surface waters <br /> via tail water from the field; and <br /> 4) the waste is shown to provide a benefit for the soil on which it is applied,such that <br /> the re-use does not simply constitute disposal. <br /> A site monitoring program should be implemented to ascertain compliance with points (2) <br /> and(3)above. <br /> 7.2 Recycling <br /> Recycling of'designated wastes' is permissible under§2511(h) of Subchapter 15. A similar j <br /> site-,waste-,and use-specific analysis would be necessary to demonstrate that water <br /> quality is protected and that the recycling is not just disposal. The party proposing the - <br /> recycling should provide this analysis to the appropriate Regional Water Quality Control <br /> Board for review and approval. <br /> Page 44 Designated Level Methodology <br />