This information
collection is approved subject to the changes cited in the CDC
memos dated 11/4/99, 11/12/99, and 11/19/99. However, an additional
concern remains about data completeness at the third level of
analysis, which seeks to determine the relationship between the
incidence of bladder cancer and individual THM levels.CDC should
pay particular attention to the data completeness of THM levels,
and try to ensure that there is adequate data available to support
conclusions at this level of analysis. The agency should also
explore different options for narrowing the subject pool to
strengthen the analysis. For example, the agency might consider
conducting an analysis with those subjects for which at least 75
percent of the data is available. In addition, CDC should provide
OMB with a copy of the final report and and any interim reports
resulting from this study.
Inventory as of this Action
Requested
Previously Approved
12/31/2002
12/31/2002
1,282
0
0
561
0
0
0
0
0
Current drinking water treatment
practices in the U.S. typically include disinfection to control the
pathogenic organisms responsible for waterborne diseases. Chlorine
is the most commonly used chemical for drinking water disinfection;
however, chlorine reacts with other drinking water contaminants to
generate compounds that may cause cancer (e.g., bladder cancer) in
people. The long latency period for the development of bladder
cancer and the difficulty in reconstructing water consumption and
exposure history make it difficult to verify the association
between DBPs exposure and bladder cancer occurrence.
On behalf of this Federal agency, I certify that
the collection of information encompassed by this request complies
with 5 CFR 1320.9 and the related provisions of 5 CFR
1320.8(b)(3).
The following is a summary of the topics, regarding
the proposed collection of information, that the certification
covers:
(i) Why the information is being collected;
(ii) Use of information;
(iii) Burden estimate;
(iv) Nature of response (voluntary, required for a
benefit, or mandatory);
(v) Nature and extent of confidentiality; and
(vi) Need to display currently valid OMB control
number;
If you are unable to certify compliance with any of
these provisions, identify the item by leaving the box unchecked
and explain the reason in the Supporting Statement.