Under the act, the EQB will adopt MCLs and treatment technique requirements no less stringent than those promulgated under the Federal act for contaminants regulated under the Federal regulations. The Board may adopt MCLs and treatment technique requirements more stringent than those promulgated under the Federal act, and may adopt MCLs or treatment technique requirements for contaminants for which no MCL or treatment technique requirement has been promulgated under the Federal act.
25 Pa. Code § 109.201