This experiment proposes the continuation of a study, initiated at J-PARC, on a new type of activated carbon material, with a pore structure and chemistry "tunable" in a manner dependent on the pyrolysis conditions. Preliminary measurements on two samples representing the high-temperature and low-temperature extremes of the preparation method show distinct repolarization behavior, suggesting that the sample prepared under low-temperature conditions contains radical-forming sites and that higher temperatures lead to increased "graphitization" of the material. We wish to extend these studies to higher fields both to obtain more complete repolarization patterns and to check for level crossing resonance signals in the radical-forming material. Success in these measurements will indicate the utility of muon methods for the study of novel carbonaceous materials.