Setting Priorities for Drinking Water Contaminants (1999) / Chapter Skim
Currently Skimming:
4 Approach Used to Develop the 1998 CCL
4 Approach Used to Develop the 1998 CCL
Pages 57-69
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 57... ...
EPA was also required to develop standards for 25 new DWPL contaminants every three years. Now, instead of publishing a DWPL and then regulating 25 new contaminants every three years, the 1996 amendments require EPA to "publish a list of contaminants, which, at the time of publication, are not subject to any proposed or promulgated national primary drinking water regulation, which are known or anticipated to occur in public water systems, and which may require regulation under this title." As discussed in Chapter 1, this new list, the Drinking Water Contaminant Candidate List (CCL)
|
From page 58... ...
DRAFT DRINKING WATER CONTAMINANT CANDIDATE LIST When published on October 6,1997, the draft CCL included 58 unregulated] chemical contaminants and contaminant groups (further divided into data need categories)
|
From page 59... ...
Also, at the recommendation of the working group, EPA sought external expertise on microbiological contaminants and convened a workshop of microbiologists and public health specialists to develop an initial list of current and emerging pathogens for possible inclusion on the draft CCL. The findings and recommendations from the workshop were fully adopted by the working group.
|
From page 60... ...
As briefly summarized in Table 4-1, eight lists were ultimately retained and combined to provide the working group with an initial list of 262 chemical contaminants for consideration. EPA made it clear that the number of contaminants on the draft and final CCL would have to be reduced from 262.
|
From page 61... ...
Pending completion of these reviews, EPA withdrew 21 contaminants (see Table 4-2) from consideration for the draft CCL based solely on the possibility of endocrine disruption (i.e., each chemical did not appear on any of the other nine initial lists of potential contaminants)
|
From page 62... ...
they would consider only chemical contaminants included on EPA's initial list that did not have National Primary Drinking Water Regulations, and (2) they would consider occurrence, or anticipated occurrence, first, before any evaluation of health effects information.
|
From page 63... ...
4 2. If not looked for, was the contaminant likely to be found in water based on surrogates for occurrence, including known TRI releases5 or high production volumes,6 coupled with physical-chemical properties likely to result in occurrence in water supplies, or high OPP ground water risk scores.7 If both occurrence elements were negative, the contaminant was excluded from further evaluation and not included on the draft CCL (EPA, 1997a)
|
From page 64... ...
. FINAL DRINKING WATER CONTAMINANT CANDIDATE LIST The purpose of publishing the draft CCL prior to the final CCL was to seek public comment on various aspects of its development.
|
From page 65... ...
The final CCL does not include the development of guidance as a separate future regulatory action category, as originally envisioned in the draft CCL and EPA's 1996 CIM. Rather, the development of guidance for specific contaminants has been integrated into the future action categories (e.g., sodium and acanthamoeba)
|
From page 66... ...
66 Cal a' .= o be o .= ¢ a' q ¢ EM ca · ~ 4= .n o .n C)
|
From page 68... ...
68 a' .= o q ¢ EM ca O 4= so o C)
|
From page 69... ...
SUMMARY The SDWA Amendments of 1996 significantly restructured the development process for drinking water regulations established under the 1986 SDWA amendments. Shortly after passage of the 1996 amendments, EPA began work on a conceptual, nsk-based approach, the CIM, for identifying and selecting unregulated chemical and microbiological drinking water contaminants as priorities for its drinking water program.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.