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Method to Calculate AOX Component of Permit Fees

(relative to Section 3 of the Waste Management Permit Fees Regulation B.C. Reg 299/92 deposited on July 31, 1992)

This method only applies to the calculation of the AOX component of permit fees in the Waste Management Permit Fees Regulation. This method does not apply to any other calculations in the regulation or any permits.

A. Determine Flow and Production

1. Determine the maximum authorized effluent flow (Fmax) in cubic metres per day.

See the permit limit and, if necessary, convert to units of cubic metres per day.

2. Determine the bleached pulp reference production rate (P) in ADt/d.

Using the methodology described in sections 12 and 13 of the federal Pulp and Paper Effluent Regulations SOR/92-269 and using the same 12-month time period that was used to determine the federal reference production rate, determine the bleached pulp reference rate* in air-dried tonnes per day. (The federal regulation can be found at: http://laws.justice.gc.ca/en/f-14/sor-92-269/121652.html

*The federal reference production rate includes production from the kraft or sulphite pulp mill, thermo mechanical pulp mill, groundwood mill etc., but the bleached pulp reference rate only includes production from the Kraft or sulphite pulp mill's bleach plant.

B. Determine the Most Restrictive AOX Limit

1. For permits where AOX is in mg/L convert to kg/ADt and compare to 0.6 kg/ADt (in regulation).

AOX(monthly ave kg/ADt) = AOX(daily max mg/L) x Fmax(m3/d) ÷ P(ADt/d) ÷ 1000(mg/kg-m3/L) ÷ 1.52 (factor to convert daily max to monthly average)

Where: Fmax = the maximum daily flow of effluent authorized by permit
             P = the bleached pulp reference production rate defined in A.2 above

2. For permits where AOX is expressed in kg/ADt (daily maximum) convert to kg/ADt (monthly average) and compare to 0.6 kg/ADt (in regulation).

AOX(monthly ave kg/ADt) = AOX(daily max) ÷ 1.52

3. For permits where AOX is expressed in kg/d convert to kg/ADt (monthly average) and compare to 0.6 kg/ADt (in regulation).

AOX(monthly ave kg/ADt) = AOX(daily max in kg/d) ÷ P(ADt/d) ÷ 1.52

C. Determine the AOX fee

Using the most restrictive of the AOX kg/ADt (monthly average) or the AOX 0.6 kg/ADt limit of the Pulp Mill and Pulp and Paper Liquid Effluent Control Regulation as determined in B, calculate the AOX total discharge per year.

AOX(total tonnes/yr) = AOX(monthly ave kg/ADt) x P(ADt/d) x 365(d/yr) ÷ 1000(kg/tonne)

Using the contaminant fee for AOX found in Schedule C of the Permit Fees Regulation (B.C. Reg. 299/92) calculate the annual AOX fee.

AOX Fee($/yr) = AOX(total tonnes/yr) x Rate($/tonne)