Intermittent toxicity

Where the permittee has demonstrated intermittent toxicity in either acute or chronic WET testing, DEQ will require an increase in the frequency of WET testing and may require the permittee to perform a TRE/TIE for the affected species. A WET limit, chemical-specific numerical limit, or toxicity-specific management practice may be required at the completion of a TRE/TIE if DEQ determines it is warranted.