NSF 60 - Purkiss November 30, 2011

Product Labeling Information Current Requirements of Section 3.5 The product container shall be clearly identified with the manufacturer’s name and address, product identification, net weight, and lot number. When applicable the manufacturer shall specify any special precautions for handling, storage, and use.

Product Labeling Information Proposal The product container or documentation shipped with the product, such as a technical data sheet, or MSDS………..shall be clearly identified with the manufacturer’s name and address, product identification, net weight, and lot number. When applicable the manufacturer shall specify any special precautions for handling, storage, and use. Reason: –For bulk shipments where container cannot be labeled. –EPA label requirements for disinfectants often prohibit additional information.

Product Labeling Information Proposal: The product container or documentation shipped with the product, such as a technical data sheet, or MSDS shall be clearly identified with the manufacturer’s name and address, product identification, net weight, lot number, maximum use level and certification markings of applicable certification organizations. When applicable the manufacturer shall specify any special precautions for handling, storage, and use. Reason: Water treatment plant needs to know: –MUL –Which website to look at to verify certification or to report a contamination event.

Product Labeling Information Proposal The product container or documentation shipped with the product, such as a technical data sheet, or MSDS shall be clearly identified with the manufacturer’s name and address, product identification, net weight, lot number, maximum use level and certification markings of applicable certification organizations. When applicable the manufacturer shall specify any special precautions for handling, storage, and use. Information for polyelectrolyte coagulants and flocculants shall include: –the polymer type (e.g. Epi-DMA Polyamine, PolyDADMAC, or anionic, cationic or non-ionic polyacrylamide) –the active polymer concentration for solutions and emulsions, or –the moisture content of dry products.

Product Labeling Information Polymer Information suggested by AWWA Standards Committee For Polyelectrolytes Many utilities dewater the polymer sludge and recycle water to the head of the water treatment plant. This potentially adds additional residual monomer to the treated water so that the utility is unaware if they are exceeding the US EPA Treatment Technique. Utility needs to know the polymer type and concentration to estimate amount of residual monomers that might impact compliance with TT.

Prep Method C Revise Annex B.3.4 Method C to reflect actual use conditions of softening chemicals. Includes: CaCO 3, Ca(OH) 2, CaO, MgCO 3, Mg 2 (OH) 2 CO 3. H 2 O, MgO. Chemicals are used for lime softening to reduce hardness and precipitate divalent metals like Barium. However we have actually had failures for trace amounts of Barium even though lime softening is one of the principal techniques used to remove barium.

Prep Method C Reason is current prep C requires dissolving chemicals in acid. Whereas in practice the chemicals are used at elevated pH, where Ca, Ba and other metals precipitate out of solution. We took a sample of CaO that had traces of Barium and prepared via Prep C at various concentrations. As the amount of CaO increased the level of Ba decreased. Which is what happens and is expected in softening process.

Prep Method C Proposal to modify Prep Method C: Add one step before acidification where pH is increased and sample is filtered to remove metals precipitated in softening process.

Prep Method C B.3.4 Method C i)Filter through GF/C filter under vacuum into 500 mL beaker. j)Add 10 mL 1 M sodium bicarbonate solution to filtrate and stir for 5 minutes. Quantitatively transfer this solution into a second filter apparatus and filter again through a GF/C filter. k)Using a 3mL plastic disposable pipette, adjust the pH with 1:4 nitric acid until it remains between 1.8 and 2.0 over 5 minutes. l)Quantitatively transfer to a 1000mL volumetric flask and dilute to volume with dilute nitric acid (1:29, HNO 3 :water) solution.