N.H. Admin. Code § Env-A 607.02
#1375, eff 7-1-79; ss by #1717, eff 2-19-81; ss by #2332, eff 4-29-83; ss by #2938, eff 12-27-84; ss by #5033, eff 12-27-90; ss by #6057-B, eff 6-30-95; ss by #7879, eff4-26-03; ss by #9791, eff 10-1-10; ss by #10175, eff 9-1-12