AWWA B701:2018 pdf download.Sodium Fluoride
5.2.2 Test procedure for size. Rapidly weigh approximately 100 g of sample to the nearest 0.1 g and screen until a constant weight is achieved on the appropriate US Standard Sieve Series to determine compliance with the size requirements of Sec. 4.1. Weigh to the nearest 0.1 g the amounts of material passing through the sieve or being retained on the sieve. Report each portion of material passing through the sieve or retained on the sieve as a percent of the total initial sample. The entire process should be performed in a dry atmosphere and as quickly as possible.
5.2.7 Test procedure for impurities. When testing for impurities, the analytical methods provided for in Standard Methods for the Examination of Water and Wastewater shall be employed. Table 2 shows impurity-specific methods and additional methodologies that provide for automation and for multiple analyses to be determined at the same time. The aggregate methodologies are recommended and often are more economical when the full spectrum of impurities is to be determined. Producers are encouraged to maintain a database of impurity concentrations based on quarterly analysis of normal production product.
If the material delivered to the purchaser does not meet the chemical, physical, safety, or security requirements of this standard, the purchaser shall provide a notice of nonconformance to the supplier within 10 days after receipt of the shipment at the point of destination. The results of the purchaser’s tests shall prevail unless the supplier notifies the purchaser within five days after receipt of the notice of nonconformance that a retest is desired. On receipt of the request for a retest, the purchaser shall forward to the supplier one of the sealed samples taken in accordance with Sec. 5.1. If the results obtained by the supplier do not agree with the test results obtained by the purchaser, the other remaining sealed sample shall be forwarded, unopened, for analysis to a referee laboratory agreed on by both parties. The results of the referee analysis shall be accepted as final.AWWA B701 pdf download.