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Procedures for Detection and Quantitation

Detection indicates the presence of a pollutant in a sample. Quantitation indicates how much pollutant is in the sample. Detection and quantitation procedures apply to all chemical analytical methods under the Clean Water Act. The procedures are a way to pre-test laboratory performance to confirm that they can accurately measure a specific chemical pollutant in a water sample.

Proposed Rule Withdrawal and Notice of Document Availability

We are withdrawing our March 2003 proposal to revise detection and quantitation procedures used in Clean Water Act programs. Our decision to withdraw the proposal is based on the divergent views on the proposed revisions and a desire to improve the procedures through a possible stakeholder dialogue. We are also releasing a revised assessment document on detection and quantitation procedures.

Fact Sheet (1 pager) about the proposed rule withdrawal and document availability (November 1, 2004)

Proposed Rule Withdrawal

Withdrawal published in the Federal Register | Print version (PDF, 64kb, 4 pages) from the Government Printing Office exit EPA (November 8, 2004)

The docket for this proposed rule withdrawal is available through edockets. Click on "Quick Search" in the left-hand navbar and enter ID# OW-2003-0002 into the search box.

Document Available: Revised Assessment of Detection and Quantitation Approaches

Notice of document availability published in the Federal Register | Print version (PDF, 64kb, 4 pages) from the Government Printing Office exit EPA (November 8, 2004)

Document: Revised Assessment of Detection and Quantitation Approaches - October 2004 (PDF, 7mb, 254 pages, about this format) This document supersedes the Technical Support Document for the Assessment of Detection and Quantitation Approaches, February 2003.

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Feasibility of a Potential Stakeholder Process

Proposed Rule Information at this link provided for reference purposes only

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