**~36G4077534**

STATE OF WASHINGTON DEPARTMENT OF ECOLOGY
IN THE MATTER OF COMPLIANCE BY Kaiser Aluminum & Chemical Corporation Mead Works With Chapter70.94 RCWand the Rules and Regulations ofthe Department of Ecology
To:**M~JGregGorton** KaiserAluminum & Chemical Corporation Mead Works 2111 E Hawthorne Road Mead, WA 99021-9517 ) ) ) ) ) Order No. DE 01AQIS-3285 Amendment 111

RCW 70.94.011, RCW 70.94.331(5), and RCW 70.94.141(3) provide the Department of Ecologythe authority to issue orders to enforce the Washington Clean Air Act. WAC 175- 475 sets statewide ambient air qualitystandards for carbon monoxide (CO), which are equivalent tofederal health based standards. Spokane was already designated nonattainment for CO when the 1990Amendments to the Clean AirAct were enacted on November 15, 1990. Spokane was classified**~moderate"** because the area had higher CO concentrations than the standards set byWAC 175-475. Because ofviolations ofthe CO standard in 1995, Spokane was reclassified to "serious" and required to submit a revised State Implementation Plan (SIP) that metadditional nonattainment requirements to ensure that the area would meet the CO standard. The Department updated the SIP for Spokane to meet these requirements. As part ofthis update, the Department requested that Kaiser Aluminum & Chemical Corporation model COconcentrations from its Mead Works, which is located within the Spokane CO nonattainment area. After evaluating the air quality modeling results, the Department found that modeling predictedthat the highest concentrations would nearthe CO standard. Therefore, the Department required via order No. DEAQIS-3285, that Kaiser set an ambient air monitoring station atthe location ofthe highest modeled CO concentration to verify continuing attainmentof the CO standard.
In December2000, Kaiser fully curtailed its primary aluminum production operations at its Mead Work dueto market and power availability conditions. In October 2001, the Department ordered Kaiser to begin ambient airmonitoring for CO atthe highest modeled CO concentration location. Due to the continued full curtailment ofthe facility, the Department approved a nearby existing ambient airmonitoring location ofKaiser's as being satisfactory for gathering background ambient CO concentration levels until primary aluminum production was resumed. An ambient CO monitorbegan operation atthe Fairview Station in May 2001.
Forthese reasons, and in accordance with RCW 70.94.141(3), IT IS ORDERED that Kaiser Aluminum & Chemical Corporation's Mead Works take the following actions:
1. Afteroperation ofthe ambient CO monilor at the Fairview Station through April2003, exercise. 

### ifdesired, the option to terminate the collection ofdata at this Station. 

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KaiserAluminum & Chemical Corporation Order No. DE 01AQIS·3285 Page 2 of2

2. Within 30 days ofthe date ofthe resumption of primary aluminum production at the Mead Works, request the Department's approval ofa site located at the top of the hill lying between Fairview Road to the northwest and Gerlach Road to the southeast for a CO monitoring station.
3. Within 60 days of the date ofthe Department's approval ofa site, install and maintain an ambient CO monitoring station at the site approved bythe Department. The monitor shall be operated and maintained as described in the Washington State Department of Ecology Air Monitoring Quality Assurance Plan and Procedures Manual 1195-201.
4. Report CO monitoring data with its monthly 

### airmonitoring report. Any excursions above the CO standards shall be reported to the Department by E-mail within a week oftheir occurrence. Failure to complywith this Order may result in the issuance of civil penalties orother actions, whether administrative orjudicial, to enforce the terms ofthis Order. This Order maybe appealed. Your appeal must be filed with the Pollution Control Hearings Board, PO Box 40903, Olympia, Washington 98504-0903 within thirty (30)days ofyour receipt ofthis Order. Your appeal must also be sent to the Department of Ecology c/o the Industrial Section. PO Box 47600, Olympia, Washington 98504-7600. Your appeal alone wilt not stay the effectiveness ofthis Order. Stay requests must be submitted in accordance with RCW 43.21B.320. These proceduresare consistent with ch.43.21B RCW. Dated this 9th dayofApril 2003 at Lacey, Washington.

Carol Kraege, P.E.

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## U Industrial Section Manager Solid and Financial Assistance Program # , 1 /' 1 ,



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