(a) Section 505(a)(1) of the Clean Water Act (hereinafter the Act) authorizes any person or persons having an interest which is or may be adversely affected to commence a civil action on his own behalf to enforce the Act or to enforce certain requirements promulgated pursuant to the Act. In addition, section 505(c)(3) of the Act provides that, for purposes of protecting the interests of the United States, whenever a citizen enforcement action is brought under section 505(a)(1) of the Act in a court