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Title 18 . Environmental Conservation
Chapter 53 . Administrative Enforcement
Section 40. Averaging oxygen content method of compliance

18 AAC 53.040. Averaging oxygen content method of compliance

(a) A CAR using the averaging oxygen content method of compliance with this chapter shall document that the average oxygen content of the total volume of gasoline sold or transferred for use in a control area during a control period, including a debit or credit balance of applicable oxygen credits, is not less than 2.7 percent by weight.

(b) A CAR using the averaging oxygen content method of compliance must use that method for the entire control period.

(c) Repealed 10/31/97.

(d) Calculation of the following totals is necessary to determine whether, at the end of each control period and for each control area, a CAR is in compliance with this chapter:

(1) the total volume of oxygenated gasoline sold or dispensed in the control area, which is

(A) the total volume of each separate batch or truckload of oxygenated gasoline sold or dispensed in the control area; plus

(B) the total volume of oxygenated gasoline for which the CAR has received credit by the purchase of oxygen credits; minus

(C) the total volume of oxygenated gasoline for which the CAR has sold oxygen credits to another CAR;

(2) the total required content of oxygen, which is the total volume of oxygenated gasoline sold or dispensed, as determined in (1) of this subsection, multiplied by 2.7 percent;

(3) the total content of oxygen actually sold or dispensed in the control area, which is

(A) the oxygen content of each separate batch or truckload of oxygenated gasoline sold or dispensed in the control area, multiplied by the actual volume of that batch or truckload; plus

(B) the oxygen content of oxygenated gasoline for which the CAR has received credit by the purchase of oxygen credits, multiplied by the volume of that gasoline; minus

(C) the oxygen content of oxygenated gasoline for which the CAR has sold oxygen credits to another CAR, multiplied by the volume of that gasoline.

(e) If the actual total content of oxygen is equal to or greater than the required total content of oxygen, the standard of 18 AAC 53.020 is met. If the actual total content of oxygen is less than the required total content of oxygen, the purchase of oxygen credits is required in order to comply with 18 AAC 53.020.

(f) To determine the oxygen content associated with each batch or truckload of oxygenated gasoline sold or dispensed in a control area, a CAR shall use the running weighted oxygen content (RWOC) of the terminal storage tank from which the batch or truckload was received at the time the batch or truckload was received. For a batch or truckload of gasoline to which an oxygenate is added outside of the terminal storage tank from which it was received, a CAR shall use the weighted average of the RWOC plus the additional oxygen content as a result of adding the additional oxygenate.

(g) The RWOC accounts for the volume and oxygen content of all gasoline that enters or leaves a terminal storage tank, and the oxygenate that is added to each tank. The RWOC must be calculated each time gasoline enters or leaves a tank or whenever an oxygenate is added to a tank. The RWOC is calculated weighing the following:

(1) the volume, type, and oxygen content of the gasoline in the storage tank at the beginning of the control period;

(2) the volume and oxygen content by weight of gasoline entering the storage tank;

(3) the volume and oxygen content by weight of gasoline leaving the storage tank; and

(4) the volume, type, and oxygen content by weight of the oxygenate added to the storage tank.

History: Eff. 9/25/92, Register 123; am 10/31/97, Register 144

Authority: AS 44.46.020

AS 46.03.010

AS 46.03.020

AS 46.14.020

AS 46.14.030

AS 46.14.510


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Last modified 7/05/2006