Chamber and LDGP systems shall be backfilled in accordance with the most current version of the manufacturer's design manual that has been approved by the department in accordance with Env-Wq 1024. If the design manual does not specify backfill requirements, then Env-Wq 1016.05 shall apply.
N.H. Admin. Code § Env-Wq 1016.07
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08