ARCHIVED REPORTS_ROY'S AUTO - HISTORICAL (2)

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y Relationship of Soil Levels in This Guidance to the OSWER Interim Soil Lead Directive . A variety of Agl�n'Ly programs address lead under a number of statutes . Lead in soil is addressed under TSCA Title IV ( including TSCA sections 402 and 403) , the RCRA Corrective Action program, and CERCLA (Superfund) , each of which differs somewhat in purpose and in the types of sites to which they apply. Title IV section 403 regulations, which have yet to be issued, will identify lead hazards in paint and residential dust and soil . RCRA Corrective Action applies to RCRA hazardous waste sites . CERCLA applies to sites that have been contaminated by releases of CERCLA hazardous substances (which include lead) . While this guidance applies to housing, which is a significant part of the coverage of TSCA Title IV, it is not issued under the legal standards of any of these statutes, nor is it to be used to support statutorily driven requirements of CERCLA or RCRA. Instead, the guidance is designed to allow screening of the worst sources of lead-contaminated soil related to the housing stock among the potentially huge number of sites affected . The top one percent of housing sites consists of about 1 , 000 , 000 locations . Because there is such a large number of housir.3 sites, the purpose of this guidance is to recommend a set of nationwide levels that will screen those sites at which, EPA expects, decisionmakers will want to consider various risk reduction activities . The higher the level and the more likely exposure w' ll occur, the more aggressive the risk reduction activities u.idertaken should be. The ultimate decision, howev .r, will be made locally by various federal , state and local officials, or by building owners , operators or occupants . These decisionmakers will need to consider a variety of issues, including the risk reduction to be achieved by different measures and the resources needed to reduce those risks . Given the wide applicability of this guidance, EPA has developed generic standards to deal with the most risky sites--in particular, those where the Agency feels most confident that actual adverse effects could occur. The Agency' s recommendations for evaluating RCRA Corrective Action and CERCLA sites are contained in the OSWER Interim Soil Lead Directive . The OSWER directive deals with a much smaller number of sites , at which extensive site characterization will have been performed before cleanup decisions are made . RCRA and CERCLA programs , thus, will often have site-specific exposure values, which may be in a relatively narrow range . As a result; values chosen for action under the RCRA or CERCLA programs may be different from those selected under this guidance . Also, once the section 403 regulations are promulgated, OSWER intends to issue a final (to replace the interim) directive . 14