Diane Lorenzen, P.E.Senior Project Engineer

Diane is a licensed professional engineer with a B.S. in Civil Engineering from Stanford University and an M.S. in Environmental Engineering from Montana Tech. She started her air quality consulting career at Bison Engineering in 1991. From 1996 through 2016, she worked as an independent air quality consultant while focusing on raising her family. Diane also worked at Montana DEQ for two years as an air quality modeling specialist. Diane rejoined Bison Engineering in 2016.

Diane has a great deal of experience in air quality permitting and compliance support for wood products clients in Idaho, Washington, Oregon and Montana. She is skilled in regulatory analysis, emissions estimation and dispersion modeling and has experience with Toxic Air Pollutant (TAP) regulations and the EPA Region 10 Federal Air Rules for Reservations (FARR). While at Montana DEQ, Diane helped establish the modeling protocol for Montana’s Regional Haze modeling effort. She set up CALPUFF modeling files for sources potentially subject to Best Available Retrofit Technology (BART) requirements.

Diane has experience with Storm Water Pollution Prevention Plans (SWPPP) and Spill Containment Prevention and Countermeasure (SPCC) plans for industrial facilities. She has also completed the air resources sections of a number of NEPA documents for forest management plans.

Diane joined the Peace Corps immediately following college graduation, and spent two years working as an Irrigation Engineer in Nepal. She continued her volunteer work as a Cub Scout and 4-H Leader, and is now involved with programs to help homeless families. Diane has been elected to the Missoula County Public Schools Board of Trustees and is very involved in ongoing school construction and renovation projects. She enjoys the Missoula arts community and taking courses at the University of Montana.

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