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Alternate Concentration Limits (ACL's)

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"Alternate Concentration Limits (ACL's) in Superfund Cleanups," July 19, 2005.
OSWER Directive 9200.4-39, 4p.
Available on-line from OSWER [PDF 340K].

This memorandum provides EPA policy related to the use of CERCLA ACLs in Superfund cleanups and supersedes any previous guidance on this matter. CERCLA section 121 provides authority to use ACLs under certain circumstances. This memorandum reiterates the statutory requirements and provides several factors to consider in evaluating whether use of CERCLA ACLs may be appropriate under site-specific circumstances.

Caution: Information in the following document cannot be applied to Superfund sites. This is because the CERCLA statute placed several limitations on the use of ACLs in Superfund remedies (see OSWER Directive 9200.4-39, above).

"Alternate Concentration Limit Guidance, Interim Final," July 1987.
OSWER Directive 9841.00-6C, EPA/530-SW-87-017. NTIS Order Numbers PB87206165 and PB88214267, 89p. plus appendices.
Available on-line from OSWER [HTML]

This document provides guidance to RCRA facility permit applicants and writers concerning the establishment of RCRA Alternate Concentration Limits (RCRA ACLs). The guidance lists 19 factors, or criteria, that are used to evaluate ACL requests.


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