SUMMARY: In an August 19, 2009, Federal Register notice, EPA announced that it was seeking comments on additional approaches to analyzing data related to the Agency’s preliminary regulatory determination for perchlorate. (Perchlorates are the salts derived from perchloric acid (HClO4). They occur both naturally and through manufacturing.) The additional comments are sought in an effort to ensure consideration of all the potential options for evaluating whether there is a meaningful opportunity for human health risk reduction of perchlorate through a national primary drinking water rule. In response to requests from several stakeholders, this action reopens the public comment period for an additional 15 days.

DATES: EPA must receive your comments on or before October 8, 2009.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-HQ-OW-2009-0297, by one of the following methods:
* http://www.regulations.gov: Follow the on-line instructions for submitting comments.
* Mail: Water Docket, Environmental Protection Agency, Mailcode: 2822T, 1200 Pennsylvania Ave., NW., Washington, DC 20460.
* Hand Delivery: Water Docket, EPA Docket Center (EPA/DC) EPA West, Room 3334, 1301 Constitution Ave., NW., Washington, DC. Such deliveries are only accepted during the Docket’s normal hours of operation, and special arrangements should be made for deliveries of boxed information.

74 FR 48541 — Sep. 23, 2009 EPA data from http://www.CyberRegs.com