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Wastewater Systems Effluent Regulations (SOR/2012-139)

Regulations are current to 2020-11-02 and last amended on 2015-01-01. Previous Versions

Application (continued)

Marginal note:Types of wastewater systems

 For the purpose of these Regulations, there are two types of wastewater systems, as follows:

  • (a) an intermittent wastewater system, namely, one with a hydraulic retention time of at least 90 days that deposits effluent via its final discharge point during at most four periods per calendar year, each of which is separated from every other period by at least seven clear days during which no deposit occurs; and

  • (b) a continuous wastewater system, namely, any wastewater system other than an intermittent wastewater system.

Marginal note:Consolidated wastewater systems

  •  (1) If an owner of at least 10 wastewater systems — none of which treats its wastewater in a manner that would permit the deposit of effluent via its final discharge point that meets the condition set out in paragraph 6(1)(a) or (b) (referred to in these Regulations as an “original wastewater system”) — plans to consolidate those original wastewater systems into one or more wastewater systems (referred to in these Regulations as a “planned consolidated wastewater system”), the original wastewater systems that constitute each of those planned consolidated wastewater systems are, on the receipt by an authorization officer of a consolidation plan referred to in subsection (3), deemed to be a single wastewater system (referred to in these Regulations as a “fictional consolidated wastewater system”).

  • Marginal note:Final discharge point

    (2) The final discharge point for each fictional consolidated wastewater system is deemed to be the final discharge point of the original wastewater system — among all of the original wastewater systems that constitute that fictional consolidated wastewater system — that is allocated the greatest number of points under the table to Schedule 2.

  • Marginal note:Consolidation plan

    (3) The consolidation plan must contain the following information:

    • (a) a description of the modifications to be made to each of the original wastewater systems so that the effluent deposited via the final discharge point for the planned consolidated wastewater system is not acutely lethal and meets the conditions for authorization set out in paragraphs 6(1)(a) and (b), along with a schedule for implementation of the plan;

    • (b) a statement identifying the final discharge point of each of the original wastewater systems that are, under the plan, to be eliminated, including the information referred to in paragraph 18(1)(e) for each of those final discharge points; and

    • (c) the information referred to in paragraphs 18(1)(f) and (g) in respect of the final discharge point and the overflow points for the planned consolidated wastewater system.

PART 1Authorization to Deposit

Effluent Containing Deleterious Substances

Marginal note:Prescribed deleterious substances

 For the purpose of the definition deleterious substance in subsection 34(1) of the Act, the following substances or classes of substances are prescribed as deleterious substances:

  • (a) carbonaceous biochemical oxygen demanding matter;

  • (b) suspended solids;

  • (c) total residual chlorine; and

  • (d) un-ionized ammonia.

Marginal note:Authorization to deposit

  •  (1) For the purpose of paragraph 36(4)(b) of the Act, the owner or operator of a wastewater system may — during a given calendar year, quarter or month, determined in accordance with subsection (2) — deposit or permit the deposit of effluent that contains any of the deleterious substances prescribed in section 5 via the system’s final discharge point in any water or place referred to in subsection 36(3) of the Act if the effluent is not acutely lethal as determined in accordance with section 15 and if — during the previous calendar year, previous quarter or previous month, determined in accordance with subsection (2) — the effluent met the following conditions:

    • (a) the average carbonaceous biochemical oxygen demand due to the quantity of CBOD matter in the effluent did not exceed 25 mg/L;

    • (b) the average concentration of suspended solids in the effluent did not exceed 25 mg/L;

    • (c) the average concentration of total residual chlorine in the effluent did not exceed 0.02 mg/L, if chlorine, or one of its compounds, was used in the treatment of wastewater; and

    • (d) the maximum concentration of un-ionized ammonia in the effluent was less than 1.25 mg/L, expressed as nitrogen (N), at 15°C ± 1°C.

  • Marginal note:Averaging period

    (2) The averages referred to in paragraphs (1)(a) to (c) and the maximum referred to in paragraph (1)(d) must be determined on the following basis:

    • (a) each calendar year, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was

      • (i) less than or equal to 17 500 m3, for an intermittent wastewater system, or

      • (ii) less than or equal to 2 500 m3, for a continuous wastewater system with a hydraulic retention time of five or more days;

    • (b) each quarter, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was

      • (i) greater than 2 500 m3 and less than or equal to 17 500 m3, for a continuous wastewater system with a hydraulic retention time of five or more days, and

      • (ii) less than or equal to 17 500 m3, for any other continuous wastewater system; and

    • (c) each month, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was greater than 17 500 m3.

  • Marginal note:Determination of averages and maximum

    (3) The averages referred to in paragraphs (1)(a) and (b) and the maximum referred to in paragraph (1)(d) must be determined

    • (a) for an intermittent wastewater system, based on samples of effluent referred to in subsections 10(1) and, if applicable, 10(5), in accordance with subsection 10(4); and

    • (b) for a continuous wastewater system, based on samples of effluent referred to in, as the case may be subsection 10(2) or (3) and, if applicable, subsection 10(5), in accordance with subsection 10(4).

  • Marginal note:Determinations for additional samples

    (4) A determination made under subsection 10(4) or (5), as the case may be, for any sample beyond the number of samples required under subsection 10(1), (2) or (3) must, if that determination were made by an accredited laboratory referred to in section 16, be included when determining an average or the maximum under subsection (3).

  • Marginal note:Determination of SS average during July, August, September or October

    (5) For an intermittent wastewater system or a continuous wastewater system with a hydraulic retention time of five or more days, the determination of the average referred to in paragraph (1)(b) is not to take into account the result of any determination of the concentration of suspended solids in a sample of effluent referred to in paragraph 10(4)(b) that was taken during the month of July, August, September or October, if that result is greater than 25 mg/L.

  • Marginal note:When SS average is deemed to be 0 mg/L

    (6) If subsection (5) applies to every sample referred to in paragraph (3)(a) that is used to determine the average referred to in paragraph (1)(b), that average is deemed to be 0 mg/L.

  • Marginal note:Conditions

    (7) The authorization granted to an owner or operator under subsection (1) is conditional on the owner or operator

    • (a) determining the average daily volume of effluent deposited annually via the final discharge point in accordance with section 7;

    • (b) for an intermittent wastewater system, either installing, maintaining and calibrating the monitoring equipment referred to in subparagraph 7(2)(a)(i) in accordance with section 9 or establishing a method of estimation referred to in subparagraph 7(2)(a)(ii) in accordance with subsection 7(4) and maintaining it;

    • (c) for a continuous wastewater system, installing, maintaining and calibrating the monitoring equipment referred to in subparagraph 7(2)(b)(i) or (ii), as the case may be, in accordance with section 9;

    • (d) monitoring effluent in accordance with sections 10 and 11 and sending a monitoring report in accordance with section 19;

    • (e) keeping the record required under section 17;

    • (f) sending an identification report in accordance with section 18; and

    • (g) sending the overflow report, if applicable, required under section 20 in accordance with subsections 19(4) and (5).

Volume of Effluent

Marginal note:Average daily volume deposited annually

  •  (1) The owner or operator of a wastewater system must, for each calendar year, calculate the average daily volume of effluent deposited via the system’s final discharge point by

    • (a) determining, in accordance with subsection (2), for each day during that calendar year when effluent was deposited, the volume of effluent deposited via the final discharge point, expressed in m3;

    • (b) calculating the sum of the daily volumes of effluent referred to in paragraph (a); and

    • (c) dividing that sum by the number of days in that calendar year.

  • Marginal note:Daily volumes

    (2) The volume of effluent during each day referred to in paragraph (1)(a) must be determined

    • (a) for an intermittent wastewater system,

      • (i) by using monitoring equipment referred to in section 9 that provides

        • (A) a continuous measure of the volume of influent, or effluent deposited via the final discharge point, during that day, or

        • (B) a measure of the rate of flow of the influent or that effluent upon which that daily volume may be estimated, or

      • (ii) by using a method of estimation in accordance with subsection (4);

    • (b) for a continuous wastewater system, by using monitoring equipment referred to in section 9 that provides

      • (i) a continuous measure of the volume of influent, or effluent deposited via the final discharge point, during that day, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was more than 2 500 m3, and

      • (ii) a continuous measure of that volume or a measure of the rate of flow of that influent or effluent upon which that daily volume of effluent may be estimated, in any other case.

  • Marginal note:Estimate of daily volume based on measured rate of flow

    (3) The estimation of the volume of effluent deposited during a day referred to in paragraph (1)(a) based on a measured rate of flow, referred to in clause (2)(a)(i)(B) or subparagraph (2)(b)(ii), is to be done as follows:

    • (a) measure the rate of flow of influent, or effluent deposited via the final discharge point, in any chosen unit of volume for any chosen unit of time; and

    • (b) calculate that volume based on that rate of flow for the duration of the deposits of effluent made on that day and, if applicable, convert it to m3.

  • Marginal note:Method of estimation — intermittent wastewater systems

    (4) The owner or operator of an intermittent wastewater system who has established a method of estimation of the volume of effluent must ensure that it is based on generally accepted engineering practices and use it to estimate the daily volume of effluent deposited via the final discharge point with a margin of error of ±15%.

 
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