| AWWA Comment Period on ANSI/AWWA B100-16, Standard for Granular Filter Material
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AWWA Comment Period on ANSI/AWWA B100-16, Standard for Granular Filter Material

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 AWWA’s 30-day public comment period. An electronic public review copy of the proposed standard can be purchased for review during the comment period for $20 each. 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. The AWWA Comment Period is now closed. Review copies are no longer available. 

Send comments to:
Tim McCandless
303.347.6285 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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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 gravel, high-density gravel, silica sand, high-density media, anthracite filter materials, and the placement of the materials in filters for water supply service application. ANSI/AWWA B604, Standard for Granular Activated Carbon, addresses use of GAC as a filter medium and as an adsorbent.

MAJOR REVISIONS
Major changes made to the standard in this edition include the following:
1. Sec. 5.3.4.3 Modified language in accordance with latest revisions to ASTM E11 describing test sieves and procedures.
2. Appendix B Table B1 modified column 4 Permissible Variation of Average Opening from Standard Sieve Designations in accordance with latest revision to ASTM E11.
3. Sec. 4.1.1.4 Added language highlighting that test procedures for granular activated carbon when used as a filtering material vary from those indicated in this standard for anthracite and can be found in AWWA B604.
4. Sec. 4.1.1.5 Added language stating that when defining fine media effective size, a plus and minus tolerance range shall be allowed to account for sampling, testing and test repeatability variances.
5. Sec. 5.1 Added language stating that samples taken during the manufacturing process prior to delivery in accordance with this standard, are more representative than samples taken after delivery prior to placement, or after placement due to the effects of transportation, handling and installation and difficulties in collecting representative samples in the field.
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