1. GENERAL REQUIREMENTS A. Brine production system must be fabricated to convert rock salt to salt brine (liquid). B. Brine mixing tank, holding tank, and tank stand must be built per the Iowa DOT CAD drawings including the specifications and requirements. C. All materials must be 316 grade stainless steel and a minimum of ¼ inch thick. D. Unit must be portable and designed to be moved with a forklift. E. Framework must be of 316 stainless steel construction. 2. TANKS A. All tanks and mounting hardware must be made of 316 grade stainless steel and a minimum of ¼ inch thick. B. Unit must be portable and designed to be moved with a forklift. C. Butt-welding of tank seams will not be acceptable. All tank seams must be leakproof with a continuous weld. D. Mixing tank must be mounted higher than the holding tank to permit complete gravity draining of brine from the mixing tank through the manifold into the holding tank prior to removing the mixing tank for cleaning.