19. Each discharger shall control the quality of each process effluent monitoring stream and each cooling water effluent monitoring stream at the discharger’s plant to ensure that each rainbow trout acute lethality test and each Daphnia magna acute lethality test performed on any grab sample collected at a process effluent sampling point or cooling water effluent sampling point at the plant results in mortality for no more than 50 per cent of the test organisms in 100 per cent effluent.  O. Reg. 561/94, s. 19. PART V   MONITORING Monitoring — General

20. (1) Despite sections 22 to 29, a discharger need not collect samples from any process effluent or cooling water effluent or salt evaporator effluent monitoring stream at the discharger’s plant on a day on which process effluent or salt evaporator effluent is not being discharged from the plant. (2) Where a discharger is required by this Regulation to pick up a set of samples and analyze it for certain parameters,  the discharger shall pick up a set of samples sufficient to allow all the analyses to be performed. (3) A discharger shall use all reasonable efforts to ensure that all analyses required by this Regulation are completed as soon as reasonably possible and that the results of those analyses are made available to the discharger as soon as reasonably possible. (4) Subject to subsection (7), each discharger shall pick up all samples required to be picked up at the discharger’s plant under sections 22, 28 and 29 between the hours of 7 a.m. and 10. a.m. (5) If the Director is satisfied, on the basis of written submissions from a discharger, that the circumstances at the discharger’s plant are such that it would be impractical to pick up samples from each process effluent, cooling water effluent and salt evaporator effluent sampling point established at the plant under this Regulation within the time period specified in subsection (4), the Director may give the discharger a written notice in respect of the plant, varying the time period specified in subsection (4). (6) Subject to subsections (7) and (8), where a discharger is required by sections 22, 28 and 29 to pick up samples, the discharger shall pick up samples collected over the 24-hour period immediately preceding the pick-up. (7) The 24-hour period referred to in subsection (6) may be shortened or enlarged by up to three hours to permit a discharger to take advantage of the three-hour range specified in subsection (4) or of a different three-hour period specified in a notice under subsection (5). (8) Where a notice has been given under subsection (5) in respect of a plant specifying a time period longer than three hours, the 24-hour period referred to in subsection (6) may be shortened or enlarged by up to that longer amount of time to permit the discharger to take advantage of the time period specified in the notice. (9) If the circumstances at a plant change so that the Director is satisfied that the circumstances described in subsection (5) no longer apply at the plant, the Director may revoke a notice given in respect of a plant under subsection (5) by giving a notice of revocation in writing to a discharger for the plant.  O. Reg. 561/94, s. 20. (10) Sections 22 to 29 do not apply in relation to the Unimin Canada Ltd., Badgeley Island plant for any period during which, (a) production at the plant is interrupted; and (b) the employees and agents of the discharger are absent from Badgeley Island. (11) Each discharger for the Unimin Canada Ltd., Badgeley Island plant shall provide written notice to the Director no later than 14 days before each of the following: 1. Any date on which the discharger plans to interrupt production at the plant to the extent that employees and agents of the plant will not be required on Badgeley Island. 2. Any date on which the discharger plans to restart production at the plant, to the extent that employees and agents of the plant will be required to be present on Badgeley Island.  O. Reg. 170/96, s. 5. Alternate Sampling Procedures

21. (1) Where a discharger is, by virtue of subsection 7 (1), required by the Ministry of the Environment publication entitled “Protocol for the Sampling and Analysis of Industrial/Municipal Wastewater”, as amended from time to time, to collect a composite sample for any sample required to be picked up at a stream at the discharger’s plant under this Regulation, the discharger may collect the composite sample by collecting three equal volume grab samples from the stream at intervals of at least two hours and combining them.  O. Reg. 235/07, s. 3. (2) A discharger who is required to collect a composite sample from a process effluent monitoring stream under section 22 may instead collect a single grab sample from the stream if the process effluent monitoring stream flows from a wastewater treatment facility and the retention time calculated under subsection (3) in relation to the stream is two days or more.  O. Reg. 561/94, s. 21 (2). (3) A retention time in relation to a process effluent monitoring stream is the period of time in days that results from dividing the total available volume, expressed in cubic metres, of the wastewater treatment facilities on the stream by the average daily flow, expressed in cubic metres, of the stream.  O. Reg. 561/94, s. 21 (3). (4) For the purposes of subsection (3), the total available volume of the wastewater treatment facilities on the process effluent monitoring stream is the volume of the wastewater treatment facilities that may be occupied by water on any day within the 90-day period preceding the date of the calculation of the retention time, taking into account, (a) any requirements that apply in respect of the operation of those facilities in any Act or in any approval, order, direction or other instrument issued under any Act; and (b) any solid waste or sludge contained within those facilities on the day of the calculation of the total available volume of those facilities.  O. Reg. 561/94, s. 21 (4). (5) For the purposes of subsection (3), the average daily flow of the process effluent monitoring stream is the arithmetic mean of the 30 highest daily volumes calculated under section 30 in relation to the stream within the 90-day period preceding the date of the calculation of the retention time.  O. Reg. 561/94, s. 21 (5). (6) The discharger of a plant to which Ontario Regulation 91/90 applies may include the days of flow calculated under section 5 of that Regulation in relation to the stream between August 26, 1994 and November 23, 1994 for the purposes of calculating the average daily flow of the process effluent monitoring stream.  O. Reg. 561/94, s. 21 (6). (7) A discharger may sample at a process effluent monitoring stream in the manner described in subsection (2) for the period of time during which the retention time calculated in relation to the stream is in effect.  O. Reg. 561/94, s. 21 (7). (8) A retention time calculated under this section expires 365 days after the date on which the calculation is made or on the date that a new retention time is calculated under this section, whichever date is sooner.  O. Reg. 561/94, s. 21 (8). Monitoring — Process Effluent — Weekly

22. (1) Each discharger shall, on one day in each week, pick up a set of samples collected at each process effluent sampling point at the discharger’s plant and shall analyze each set of samples for total suspended solids. (2) There shall be an interval of at least four days between successive pick-up days at the plant under subsection (1). (3) All samples picked up under subsection (1) in a week shall be picked up on the same day in the week.  O. Reg. 561/94, s. 22. Monitoring — Process Effluent — Quality Control