Specifications include, but are not limited to: The materials supplied under these specifications shall contain no soluble material, mineral or organic substances in quantities capable of producing deleterious or injurious effects upon the health of those consuming water which has been treated with it and shall in all respects meet as a minimum the current minimum standard specifications of the American Water Works Association (AWWA) or the current Water Chemicals Codes (as published by the National Academy Press of the National Academy of Sciences), whichever is the more restrictive specification, unless otherwise specified in these specifications, for materials used in the purification of municipal potable water supplies. The LAS at no time shall contain any substance which would cause by addition of the LAS any violation of the Maximum Contaminant Levels (MCL's) as set forth by state and federal regulations. The quality of the Liquid Ammonium Sulfate (LAS) delivered shall be: • Total Heavy Metals (as Lead) 0.02% (MAX) • Physical State Liquid Ammonium Sulfate • Amount of LAS in Solution (WT.%) 38 – 40 • Specific Gravity 1.20 – 1.22 • PH 6.0 – 7.0 • Iron (mg/l) <10 • Color <75 • Odor None The LAS shall not contain specific impurities in excess of the following limits (by weight): • Pyridine, 50 mg/kg • Ether-soluble matter, 30 mg/kg • Cyanide, non-detectable with the analytical method described in the AWWA standard.