UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WSG175 Date Signed: December 1, 2004 MEMORANDUM SUBJECT: LT1ESWTR Turbidity Provisions Technical Guidance Manual FROM: Stephen F. Heare, Director Drinking Water Protection Division TO: Drinking Water Program Managers Regions I - X I am writing to inform you that the Long Term 1 Enhanced Surface Water Treatment Rule Turbidity Provisions - Technical Guidance Manual is now available. The Long Term 1 Enhanced Surface Water Treatment Rule (LT1ESWTR) increases public health protection by reducing the risk of exposure to microbiological pathogens, specifically Cryptosporidium. On January 1, 2005, systems will begin complying with the turbidity provisions in this rule. This document provides operators with practical guidance and sample worksheets which may help systems collect important information. The document also includes additional materials such as a background reference information, equations and sample calculations, example reports, and example operating procedures. The document is available in electronic format on the EPA website at http://www.epa.gov/safewater/mdbp/ltleswtr.html. Hard copies will also be available shortly and will be sent to you for your reference. Additional copies can be obtained by contacting the Water Resource Center at 202-566-1729 (identify document number EPA 816- R-04-007). You may also contact the National Service Center for Environmental Publication 1- 800-490-9198 to obtain hard copies. If you have any questions, please contact Katie Leo Porter at (202) 564-3839. ------- |