AWWA B407-18 pdf download.Liquid Ferric Chloride
Liquid ferric chloride (FeCl3) is an orange-brown, acidic, corrosive, aqueous solution. The specific gravity of the solution shall be in the range of 1.3 to 1.5. The specific gravity will vary with the liquid ferric chloride concentration. Concentration may be varied with the season and point of destination to prevent crystallization during cold weather.
Liquid ferric chloride shall contain from 28–47 percent FeCl 3 by weight, which is 9.6–16.2 percent total iron as Fe. Not more than 2.5 percent of the total iron shall be in the ferrous state; however, the purchaser may specify higher allowable ferrous-iron concentration. The free acid, expressed as hydrochloric acid (HCl), shall not exceed 1.0 percent. The solution shall not contain more than 0.2 percent total insoluble matter by weight.
4.3.1 General. The material supplied in accordance with this standard shall contain no soluble inorganic or organic substances in quantities capable of producing deleterious or injurious effects on the health of those consuming water that has been properly treated with the material. This standard applies to liquid ferric chloride produced by currently recognized methods of manufacture. If other methods or raw materials are used, impurities could be present that might be inconsistent with accepted water treatment practices. In such cases, additional tests by the manufacturer may be required to demonstrate that the product is suitable for water treatment purposes.
5.1.2 Amount of shipment to be sampled. Five percent of the containers shall be sampled, but a minimum of five and a maximum of 15 containers in any one shipment shall be sampled. No sample shall be taken from a leaking container. In the case of bulk shipments, a composite sample should be taken from the tank truck or barge at five equally spaced intervals during unloading of the bulk container.
5.1.3 Sampling method, sample size, and handling. The contents of each container to be sampled shall be mixed thoroughly, and a portion shall be taken of such size that the total gross sample shall consist of at least 10 qt (10 L). After thorough mixing of the gross sample, three 0.5-qt (0.5-L) samples shall be sealed in airtight bottles. Care must be taken during sampling not to introduce large quantities of air into the product. A chain-of-custody form shall accompany all samples and shall be properly completed by the sampler. Each sample container shall be labeled to identify it and shall be signed by the sampler.AWWA B407-18 pdf download.