N.H. Admin. Code § Env-A 604.01
#1375, eff 7-1-79; ss by #1717, eff 2-19-81; ss by #1861, eff 11-16-81; ss by #2332, eff 4-29-83; ss by #2938, eff 12-27-84; ss by #5033, eff 12-27-90; ss by #5989, eff 2-22-95; ss by #7879, eff 4-26-03; ss by #9906, INTERIM, eff 4-26-11, EXPIRES: 10-24-11; ss by #10000, eff 10-1-11 (from Env-A 604.02); ss by #10175, eff 9-1-12