AWWA COMMENT PERIOD ON THE REVISIONS TO AWWA B304 – Liquid Oxygen for Ozone Generation for Water, Wastewater, and Reclaimed Water Systems January 22, 2021 AWWA solicits public comments on all proposed new AWWA Standards, and on all proposed revisions, reaffirmations, or withdrawals of existing AWWA Standards. The referenced standards project is being considered for approval and the publication of this notice begins the 45-day public comment period for AWWA and ANSI. An electronic public review copy of the proposed standard can be obtained for review during the comment period by emailing ETS Support. Comments must be submitted in writing to the AWWA contact listed below no later than the last day of the comment period specified herein. Such comments shall be specific to the section(s) of the standard under review and include sufficient detail so as to enable the reader to understand the commenter's position, concerns and suggested alternative language, if appropriate. AWWA Comment Period closes on March 8, 2021. Send comments to: Liz Ralph 303.347.6177 phone 303.795.7603 fax The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes. Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal - American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal - American Water Works Association. SCOPE This standard describes liquid oxygen (LOX) for the generation of ozone for use in the treatment of potable water, wastewater, or reclaimed water. MAJOR REVISIONS Major revisions made to the standard in this edition include the following: 1. The 2nd paragraph of Sec. II.B Gas Pretreatment in the Foreword was revised to more clearly explain the potential use of liquid nitrogen in ozone generation. 2. The definition for total hydrocarbon content (THC) was revised in Sec. 3 Definitions. 3. Sec. 4 Impurities was revised for clarity and previous Sec. 4.3.5 Product certifications was moved under this section for better applicability. 4. Sec. 5.2 Sampling was revised to be consistent with industry sampling practices and to focus more on supplier sampling. 5. Sec. 5.3.2 Testing period was deleted since it is no longer applicable due to the changes in Sec. 5.2. 6. Sec. 22.214.171.124 Orsat-type meter was deleted since it is an obsolete method and is no longer used in the industry. 7. Sec. 126.96.36.199 By subtraction was deleted since it is a highly subjective procedure and is not typically used in the industry. 8. Sec. 5.3.4 Water content was revised to reduce redundancies of the wording in the subsections. 9. Sec. 5.3.5 Total hydrocarbon content (THC) was revised to reduce redundancies of the wording in the subsections.