Specifications include, but are not limited to: The supply of 7,000 tons of salt for the period 7/01119 to 6/30/20. Sodium Chloride (NaCI) - minimum percent, 96.5. Rock salt having 95 to 96.5 percent Sodium Chloride will be accepted with an adjustment equal to 96.5 percent less the actual percent Sodium Chloride content of the rock salt being received, and figured on delivered cost. Rock salt having less than 95.0 percent Sodium Chloride may be accepted at the discretion of the Town with adjustment computed as specified for Sodium Chloride contents between 95.0 to 96.5 percent. Sodium Chloride (Rock Salt) or Liquid brine or chemical agents, shall be free from contaminations, defects and waste products and is suitable for the purpose intended. Sea salt is not acceptable.