MARSHALL — Cabot Norit Americas Inc. announced Tuesday it is eliminating about 40 positions from its activated carbon plant in Marshall. According to KETK, the decision was driven by the need to better match the business’s production capacity. “Unfortunately, I’m letting about 40 positions go today,” General Manager Gavin Barrack said. “It’s a market driven issue. The volumes we expected to come through have not come through. To protect the 95 plus jobs that will remain onsite we have to take this action. Demand for powdered activated carbon following the implementation of the Mercury and Air Toxics Standards (MATS) regulation has been lower than originally expected, resulting in overcapacity.