HARCO developed it's own air flow machine and established corresponding testing equipment objectives, procedures and parameters for measuring design effectiveness and performance. The U.S. Department of Agriculture created and established their own USDA test standards and testing equipment based largely on the groundwork done by HARCO and other like minded parties. Frank N. Harris, Sr. served as an integral member of the committee that helped the USDA develop the testing standards that are still in use today. HARCO Manufacturing still leads the industry in Spark Arrestor technology and remains the only manufacturer to offer an externally mounted Locomotive Spark Arrestor that is USDA qualified.