### STATE OFWASHINGTON DEPARTMENT OFECOLOGY , :;;;'-'V'+V f t '::>.:J..,_



### IN THE MATTER OF COMPLIANCE BY Kaiser Aluminum &Chemica) Corporation Mead Works ) ) ) ) ) ORDER No. DE OIAQIS-3285

With Chapter 70.94 RCW and the Rules and Regulations ofthe Department ofEcology To: Mr. Steven G. Anderson Kaiser Aluminum & Chemical Corp. Mead Works E. 2111 Hawthorne Road Mead, W A 99021 RCW 70.94.011, RCW 70.94.331(5), and RCW 70.94.141(3) provide the Department ofEcology the authority to issue orders to enforce the Washington Clean AirAct. WAC 175-475 sets statewide ambient air quality standards for carbon monoxide (CO), which are equivalent to federal health-based standards.· Spokane was already designated nonattainment for COwhen the 1990 Amendments to the Clean AirAct wereenacted on November 15, 1990. Spokane was classified "moderate" because the area had higher CO concentrations than the standards set by WAC 175-47

### 5. Because ofviolations ofthe CO standard in 1995, Spokane was reclassified to "serious"and required to submit a revisedStateImplementation Plan (SlP)that met additional nonattainment requirements to ensure that the area would meet theCO standard. The Department has updated the SIP for Spokane to meet these requirements. As part ofthis update, the Depanment requested that the Kaiser Aluminum & Chemical Corporation model CO concentrations from 

### its Mead Works, which are located within the SpokaneCO nonauainment area. After evaluating the airquality modeling results, theDepartmentfinds that modelingpredicts that the highest concentrations are near the CO standard. Therefore, the Department is requiring that Kaiser shall set an ambient airmonitoring station at the location ofthe highest modeled CO concentration to verify continuing attainment ofthe CO standard. Forthese reasons, and in accordance with RCW 70.94.141(3), ITIS ORDERED that the Kaiser Aluminum & Chemical Corporation, Mead Works take the foHowing actions: 1. Within 30days ofthe date ofthis order. install and maintain an ambient CO monitoring station at the top ofthe hill lying between Fairview Road to the northwest and Gerlach Road to the southeast orat a different location as approved by the Department. The monitorsha11 be operated and maintained as described in the Washington State Department ofEcology Air Monitoring Quality Assurance Plan and Procedures Manual #95-201. 2. CO monitoring shall be in operation for collecting data even though the smelteris not in operation. 3. Kaiser shall repon CO monitoring data on the AirMonthly report. Kaiser shall report any CO excursions above the CO standards to the Department by E-mail within a week ofoccurrence. 

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Kaiser, Mead Works OIAQIS-3285 Page two

Failure to comply with this Order may result in the issuance ofcivil penalties or other actions, whether administrative orjudicial, to enforce the terms ofthis Order. 

### This Ordermay be appealed. Your appeal must be filed with the Pollution Control Hearings Board, P.O. Box 40903, Olympja, Washington 98504-0903 within thirty (30) days ofyour receipt ofthis Order. Your appeal must also be sent to the Department ofEcoJogy c/o the Industrial Section, P.O. Box, Olympia. Washington 98504-7706. Your appeal alone wiU not stay the effectiveness ofthis Order. Stay requests must be submitted in accordance RCW43.21B.320. These procedures are consistent with ch.43.21B RCW. Dated this 24th day ofOctober 2001 at Lacey, Washington.



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# f~p.{ulV<~ Industrial Section Manager Solid Waste and Financial Assistance Program 

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