Rule 2402. Materials or coatings on a water transportation tank or its appurtenances which come into contact with drinking water shall be of approved steel, stainless steel, fiberglass, metal, plastic, rubber, or other nontoxic materials given written approval by the department. Materials used in the construction of, or transported by, a water transportation tank shall not impart any substances to the water which may result in a violation of the state drinking water standards, or impart undesirable physical properties to the water.
Mich. Admin. Code R. 325.12402