AWWA ACE59924

This extended abstract discusses the Proposed Rule and how it was based largely upon an Agreement in Principle, developed by the USEnvironmental Protection Agency (USEPA), AWWA, and other stakeholders, such as state, environmentaland public health organizations, and signed on Sept. 19, 2000. The proposed Stage 2Disinfection/Disinfectant Byproducts Rule (D/DBP Rule) describes how monitoring locations areto be selected and how compliance will be determined. The stakeholders agreed to split the Stage2 Rule into two parts:Stage 2a, in which the trihalomethane (THM) and haloacetic acid (HAA) maximum contaminantlevels (MCL) will be temporarily increased to 120 ug/L and 100 ug/L respectively; and,Stage 2b in which the MCL's will return to 80 ug/L for THMs and 60 ug/L for HAA5.However, compliance will be based on a Location Running Annual Average rather than thesystem wide Running Annual Average of the THM Rule, and Stage 1 and 2A D/DBP Rules. TheUSEPA is expected to formally propose the Stage 2 D/DBP Rule in 2004. The temporaryincrease in the MCL for Stage 2a is intended to give those utilities which would be in compliancewith a system-wide RAA but out of compliance with a location RAA, time to make adjustmentsto treatment or operations. Includes extended abstract only.

Product Details

Edition:

Vol. - No.

Published:

06/17/2004

Number of Pages:

2

File Size:

1 file , 220 KB