Publications by Wingra Engineering Staff

 

"Measurement of Organic Air Toxics at Iron Foundries

Steven Klafka, P.E.
Wingra Engineering, S.C.

Jeff Loeffler, ChE
Waupaca Foundry, Inc.

ABSTRACT

Since 1988, air toxics emissions from foundries have been regulated in Wisconsin. Emission estimates and compliance evaluations have been based on minimal data, especially for organic air toxics.  In recent years, compliance testing for new iron foundry operation has expanded the data base for these air pollutants. This paper summarizes stack tests conducted at two Waupaca Foundry facilities.  Test results are presented for volatile organic compounds, acrolein, benzene, and formaldehyde.  Test methods, measured emission rates, production throughput and raw materials are described.  Foundry processes tested include pouring, mold cooling, and shakeout operations.  Emission factors for these operations are developed from the results.  These factors have been used to improve emission estimates and serve as a reliable tool for demonstrating compliance with air permit requirements.