EPA Revised Response Granting NWEA Petition for Rulemaking on Water Quality Criteria for Toxics in the State of Washington 10/22

EPA Revised Response Granting NWEA Petition for Rulemaking on Water Quality Criteria for Toxics in the State of Washington 10/22

EPA is providing a revised response to NWEA’s APA rulemaking petition in three parts in accordance with the terms of the proposed modified order, see id. at Dkt. No. 79, and supported by the rationale explained in the following sections below.
1. EPA is granting the petition for the following nine pollutants: acrolein, aluminum, arsenic, cadmium, copper, cyanide, mercury, nickel, and selenium.
2. EPA is deferring a response to the petition for three years for the following eight pollutants: chromium III, DDT and its metabolites, endosulfan, endrin, lead, nonylphenol, tributyltin, and zinc.
3. EPA is denying the petition for any remaining pollutants covered by the petition that are not listed in numbers 1 and 2 above.