Rule 15-18-77-5.4.6 - Certification1. Any manufacturer wishing to provide tire chips for use in onsite sewage treatment and disposal system drainfields in the state of Mississippi must first receive a certification from the State Department of Health, Division of Onsite Wastewater. Manufacturers must provide proof they can produce a tire chip coarse aggregate in conformance with the standards in Section V, part 13.2. Tire chip coarse aggregate from certified manufacturers shall be labeled as drainfield aggregate on the freight bill-of-lading. The bill-of-lading shall clearly certify that the material meets the requirement s for drainfield use. Contractors purchasing tire chip coarse aggregate shall retain a copy of the freight bill-of lading as documentation of the aggregate size and quality.15 Miss. Code. R. 18-77-5.4.6