1 Beginning on July 1, 1992 and ending on December 31, 1993, one 24-hour composite sample of the final effluent shall be collected during any day in which the chlorine bleaching plant is operating during the first month of each quarter of a given year.
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3 Effective January 1, 1995, subject to item 6, where no measurable concentration of 2,3,7,8-TCDD and no measurable concentration of 2,3,7,8-TCDF have been detected in the final effluent for the last three consecutive months, one 24-hour composite sample of the final effluent shall be collected once every quarter during any day in which the chlorine bleaching plant is operating.
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