Within six (6) months of the adoption of siting criteria, the state planning council shall perform:
(a) An inventory of existing solid and hazardous waste treatment, storage, and disposal facilities, together with their capacities;
(b) An evaluation of areas within the state not suitable for the location of waste facilities, including those areas where hazardous and solid waste treatment, storage, and disposal facilities would have a substantial impact on human health and the environment in accordance with the criteria established in § 42-103-2.