WAC 173-415-060   Monitoring and reporting.  (1) When requested by the department, each primary aluminum reduction plant shall conduct routine monitoring of emissions, ambient air, and forage in accordance with a program that has been approved by the department of ecology. Results of monitoring shall be reported within thirty days of the end of each calendar month. In addition to the information required by the Primary Aluminum MACT, 40 CFR 63 Subpart LL, the approved program shall include data as follows:

     (a) Particulate emissions: Results of all emission sampling conducted during the month for particulates, shall be expressed in units used in the applicable requirements or in units specified in the monitoring plan. The method of calculating pounds per ton shall be as specified in the approved monitoring programs. For each potline, particulate data shall be reported as total particulates and percentage of fluoride ion contained therein. For other units at a primary aluminum reduction plant, particulate data shall be reported as total particulates.

     Compliance with WAC 173-415-030(2) shall be determined by measurements of emissions from the potline primary control system plus measurements of emissions from the potline roof.

     (b) Fluoride emissions: Results of all sampling conducted during the month for fluoride emissions shall be reported in pounds of total fluoride per ton of aluminum produced. Aluminum produced shall be calculated by the method used to determine aluminum production rate in 40 CFR 63.847 (e)(6).

     (c) Other emission and ambient air data as specified in the approved monitoring program.

     (2) Other data: Each primary aluminum reduction plant shall furnish other data requested by the department of ecology to evaluate a plant's emission control program.

     (3) Change in raw materials or fuel: Any change or series of changes in raw material or fuel which results in a cumulative increase in emissions of sulfur dioxide of five hundred tons per year or more over that stated in the 1979 emissions inventory shall require the submittal of sufficient information to the department of ecology so that the effect upon ambient concentrations of sulfur dioxide can be determined. The department of ecology may issue regulatory orders requiring controls to reduce the effect of such increases.



[Statutory Authority: RCW 70.94.395 and 70.94.331. 05-17-169 (Order 05-07), § 173-415-060, filed 8/23/05, effective 9/23/05. Statutory Authority: Chapter 70.94 RCW. 91-05-064 (Order 90-06), § 173-415-060, filed 2/19/91, effective 3/22/91. Statutory Authority: RCW 70.94.331 and 70.94.395. 80-11-028 (Order DE 80-17), § 173-415-060, filed 8/14/80. Formerly WAC 18-52-061 and 18-52-071.]