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PREPARED FOR: <br />U.S. Environmental Protection Agency <br />Office of Ground Water and Drinking Water <br />Standards and Risk Management Division <br />1200 Pennsylvania Ave., NW <br />Washington DC 20004 <br />Prepared by: <br />AWWA <br />With assistance from <br />Economic and Engineering Services, Inc <br />Background and Disclaimer <br />The USEPA is revising the Total Coliform Rule (TCR) and is considering new possible <br />distribution system requirements as part of these revisions. As part of this process, the <br />USEPA is publishing a series of issue papers to present available information on topics <br />relevant to possible TCR revisions. This paper was developed as part of that effort. <br />The objectives of the issue papers are to review the available data, information and <br />research regarding the potential public health risks associated with the distribution <br />system issues, and where relevant identify areas in which additional research may be <br />warranted. The issue papers will serve as background material for EPA, expert and <br />stakeholder discussions. The papers only present available information and do not <br />represent Agency policy. Some of the papers were prepared by parties outside of EPA; <br />EPA does not endorse those papers, but is providing them for information and review. <br />Additional Information <br />The paper is available at the TCR web site at: <br />http://www.epa.gov/safewater/disinfection/tcr/regulation revisions.html <br />Questions or comments regarding this paper may be directed to TCR@epa.gov. <br />