The Cluster Rule Implementation Project responds to the Maximum Achievable Control Technology (MACT) regulations of the Environmental Protection Agency.

The scope of the project included installation of a new foul condensate tank, segregation of condensates that are high in methanol content, and treats these condensates with a steam stripper. Low volume/high concentration (LVHC) noncondensable gases (NCG) are collected and oxidised with the stripper off gas in a new direct-fired oxidiser. An existing lime kiln provides back up incineration for the LVHC gases. This project included modifications to the blowheat recovery system and installation of additional condensers to the evaporator and concentrator lines.

Ausenco Sandwell assisted Smurfit-Stone with finalising the process definition and scope of the project and provided detail design services in all engineering disciplines.

This project was part of a multi-mill assignment undertaken by Ausenco Sandwell offices in Atlanta, Montreal, and Vancouver, in parallel with the Missoula project. Ausenco Sandwell also provided engineering services for Cluster Rule Implementation Projects at Smurfit-Stone mills located in Coshocton, Ohio; Brewton, Alabama; and Ontonogan, Michigan.

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