Using “Off the Shelf” Bleach Quick Guide to Maintain Consistency

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Using “Off the Shelf” Bleach Quick Guide to Maintain Consistency By: Matthew Demers 3/20/2020 While we are in the midst of the COVID 19 crisis and we are all looking at supply chain stresses and struggles you as operators may find yourselves in a situation where you may need to use a bleach product that you may not usually use. The following information is to help you determine what and how much of a different bleach product to use, while maintaining the safety of your water for you and your users. Find and Use Approved Products It is important use chemicals that are approved by the Maine Drinking Water Program and meets the NSF 60 requirements. The following is the list of currently approved “Off the shelf” bleach that can be used for disinfection in drinking water. Be sure to check MEDWP for updates https://www.maine.gov/dhhs/mecdc/environmental- health/dwp/fit/documents/ApprovedBleachProductsForDisinfection.pdf Maine Drinking Water Approved "Off the Shelf" Chlorination products As of March 20, 2020 Clorox Regular Bleach (6%) EPA Registration # 5813-100 Clorox Germicidal Bleach EPA Registration number 5813-100-67619-32 Clorox Ultra Bleach (8.5%) EPA Registration # 5813-50 Clorox Regular Bleach2 (with Cloromax) (6%) EPA Registration # 5813-111 Clorox Germicidal Bleach (7.5%) EPA Registration # 67619-32 Pure Bright Disinfectant Bleach NSF 60 Pure Bright Disinfectant Bleach 5.25% Sodium Hypochlorite NSF 60 Pure Bright Disinfectant Bleach 6.00% Sodium Hypochlorite NSF 60 Information You Need: Verify Product is on the list and the Determine your “Normal” Bleach and EPA Registration No./NSF rating match “New” Bleach concentration (%) Determine how much you need: • Divide the normal bleach concentration by the new bleach concentration to get a conversion factor. Now simply multiply the conversion factor by the amount of bleach used in your mix recipe to determine how much new bleach to use. For example: If your normal bleach is Clorox Regular at 6%, you get Clorox Ultra at 8.5% and your normal mix is 3 cups of bleach to 15 gallons of water: 6% 8.5% = 0.71 then 3 cups X 0.71 = 2.13 cups of new bleach to 15 gallons of water. It is important to make additional checks of your system chlorine residual after you start using a new bleach to make sure you are still in your normal range. 0.2 to 0.7 mg/L is usually the desired range and at no time should the residual go over 4.0 mg/L .

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, DC 20460 OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION September 13, 2011 Ms. J. Evelyn Lawson Senior Regulatory Information Scientist The Clorox Company C/o PS&RC; P. O. Box 493 Pleasanton, CA 94566-0803 Subject: Notification Application per PR Notice 98-10 Clorox Bleach EPA Registration Number 5813-1 Application Date: August 22, 2011 EPA Receipt Date: August 23, 2011 Dear Ms. Lawson: This acknowledges receipt of the above notification application, submitted under the provision of PR Notice 98-10, FIFRA 3(c)9. Proposed Notifications: • Add an ingredient disclosure website on page 32; • Updated EPA Est. information including alternate language for Puerto Rico, and updated year. General Comments: Based on a review of the material submitted, the following comment applies: The notification application is acceptable. A copy of the accepted notification has been inserted in your file for future reference. Should you have any questions or comments concerning this letter, please contact Adam Heyward via email at heyward. adam(q),epa.gov or by telephone at (703) 347-0274 during the hours of 6:00 am to 2:30 pm EST. MbWsBS Harris^ Product Manager (32) Regulatory Management Branch II Antimicrobials Division (751 OP) a/Sf Plftte reid instruction* on nv»r*e b»for» coir I'm form. Form Aporov OMB No. 2070-O06O. Approval expire* 2-28-95 United States Registration OPP Identifier Number Environmental Protection Agency &EPA Amendment EL0359 Washington, OC 20460 Other Application for Pesticide - Section I 1. Company/Product Number 2. EPA Product Manager 3. Proposed Classification 5813-1 Monisha Harris None Restricted 4.
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