AWWA B408-18 pdf download.Liquid Polyaluminum Chloride
Liquid polyaluminum chloride-type products can have variable functions and characteristics. The determination of quality and conformance to agreed-on requirements will often be product specific, with key parameters being determined using various analytical methods. Accordingly, alternative methods can be utilized to determine key functions and constituents.
The polyaluminum chloride content in liquid PACl products shall be from 2.5 to 13 percent by weight expressed as aluminum (5 to 25 percent by weight PACl expressed as Al 2 O 3 ). The percent basicity of the PACl shall be from 10 to 83 percent. The solution shall have turbidity less than 50 ntu.
4.3.1 General. The liquid PACl product supplied according to this standard shall contain no insoluble or soluble inorganic or organic substances in quantities capable of producing deleterious or injurious effects to the health of those consuming water that has been properly treated with liquid PACl product. This standard applies to liquid PACl produced by currently recognized methods of manufacture and from suitably pure raw materials. If careless manufacturing procedures or other raw materials are used, impurities could be present that might be inconsistent with good water treatment practices. In such cases, additional tests by the manufacturer may be required by the purchaser to demonstrate that the product is suitable for water treatment purposes.
4.3.2 Product certifications. Liquid PACl is a direct additive used in the treatment of potable water. This material should be certified as suitable for contact with, or treatment of, drinking water by an accredited certification organization in accordance with NSF/ANSI 60. Evaluation shall be accomplished in accordance with requirements that are no less restrictive than those listed in NSF/ANSI 60. Certification shall be accomplished by a certification organization accredited by the American National Standards Institute.
5.1.5 Test samples. Obtain test samples of liquid PACl from the sealed material sample delivered to the purchaser’s laboratory. Unseal the material sample container only when necessary to remove quantities of the product for testing. Seal the container immediately after the test sample is removed. Mix the PACl sample thoroughly before each test portion is withdrawn for analysis. Store the test sample in an airtight glass container.AWWA B408-18 pdf download.