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1] <br />E. <br />G. <br />residual andfor no less than twenty four (24) hours at <br />140 degree F. <br />2. The City reserves the right to run performance tests once <br />a month. <br />3. Any product wlziclz, in the City's opinion, does not meet <br />the specifiedpeiformance requirements or• fails to <br />comply with the specifications will be disqualified <br />COVERAGE <br />i. These specifications cover pyrophosphate compounds used to stabilize or <br />sequester soluble iron and manganese in potable water. <br />PHYSICAL FORM <br />i. Product shall be a granular form. Powdered material will not be accepted. <br />PHYSICAL STANDARDS <br />i. Phosphate blend shall comply with the following physical requirements: <br />1. Color: White <br />2. Solubility: Completely miscible in water <br />3. Percent Phosphate as PO4 Minimum of 80% <br />4. Physical Form: Granular <br />CHEMICAL STANDARDS <br />i. Phosphate blend shall contain only NSP approved phosphorous ingredients. <br />ii. No amines or other chelating agents shall be used. <br />iii. Blended phosphate product formulation shall be only sodium salts of <br />phosphate compounds. <br />iv. No potassium salts shall be used. <br />v. Impurities in pyrophosphate products shall not exceed the following <br />concentrations: <br />Arsenic as AS <br />0.001 mg/1 <br />CoEEer as CU <br />0.2 m /1 <br />Heavy Metals total as Pb <br />0.001 mg/1 <br />Iron FE <br />0.1 m /I <br />Man anese as MN <br />< .05 mg/1 <br />Organics as C <br />None <br />Silica as SIO2 <br />1.0 <br />Zinc as ZN <br />0.01 mg/1 <br />