| (3) After December 31, 2002, a mill may not discharge dioxin |
| into its receiving waters. For purposes of this subparagraph, a |
| mill is considered to have discharged dioxin into its receiving |
| waters if 2, 3, 7, 8 - tetrachlorodibenzo-p-dioxin or 2, 3, 7, 8 |
| - tetrachlorodibenzo-p-furan is detected in any of the mill's |
| internal waste streams of its bleach plant and in a confirmatory |
| sample at levels exceeding 10 picograms per liter, unless the |
| department adopts a lower detection level by rule, which is a |
| routine technical rule pursuant to Title 5, chapter 375, |
subchapter II-A 2-A, or a lower detection level by incorporation |
| of a method in use by the United States Environmental Protection |
| Agency, or if levels of dioxin, as defined in section 420-A, |
| subsection 1 detected in fish tissue sampled below the mill's |
| wastewater outfall are higher than levels in fish tissue sampled |
| at an upstream reference site not affected by the mill's |
| discharge or on the basis of a comparable surrogate procedure |
| acceptable to the commissioner. The commissioner shall consult |
| with the technical advisory group established in section 420-B, |
| subsection 1, paragraph B, subparagraph (5) in making this |
| determination and in evaluating surrogate procedures. The fish- |
| tissue sampling test must be |