(a) Other remedies preserved.--The penalty authorized in this act is intended to be concurrent and cumulative, and the provisions of this act shall not abridge or alter any right of action or remedy, now or hereafter existing in equity, or under the common law or statutory law, criminal or civil, available to a person, municipality or this Commonwealth.

(b) Appeal.--The industrial user charged with the penalty shall have 30 days to pay the proposed penalty in full, or, if the industrial user wishes to contest either the amount of the penalty or the fact of the violation, the industrial user must file an appeal of the action pursuant to the municipal law or home rule charter or, in the absence of either of these, within 30 days pursuant to 2 Pa.C.S. (relating to administrative law and procedure). Failure to appeal within this period shall result in a waiver of all legal rights to contest the violation or the amount of the penalty.