239.9—Intervention in civil enforcement proceedings.
Any state seeking approval must provide for intervention in the state civil enforcement process by providing either:
(a)
Authority that allows intervention, as a right, in any civil action to obtain remedies specified in § 239.8 by any citizen having an interest that is or may be adversely affected; or,
(1)
It will provide notice and opportunity for public involvement in all proposed settlements of civil enforcement actions (except where immediate action is necessary to adequately protect human health and the environment); and,
(3)
It will not oppose citizen intervention when permissive intervention is allowed by statute, rule, or regulation.