Specifications include, but are not limited to: These specifications cover rock salt for ice removal. Rock salt used for ice removal shall be produced by crushing natural deposits of sodium chloride. Material produced by recrystalization of salt solutions will not be accepted. The rock salt shall be delivered in bags or sacks containing not more than 50 pounds each or in bulk when requested. When delivery is made in bags or sacks, the name of the manufacturer and net weight shall be legibly marked on each container. The percentage of sodium chloride guaranteed by the manufacturer shall be noted on the shipping report or legibly marked on the containers. Bagged rock salt shall be furnished in 50 lb. moisture proofed bags securely fastened on portable wooden 40” x 42” pallets. The pallets shall be double-faced with three (3) 2” x 4” lumber runners. The outside runners shall be 4” from the end with a third runner in the center.