Raymond A. DeWall is a Research Chemist at the EERC. He received his B.S. degree in Chemistry and Microbiology from South Dakota State University. Prior to his current position at the EERC, Mr. DeWall was a Research Chemist at the same facility. Mr. DeWall’s current areas of interest and expertise involve flue gas sampling on bench-, pilot-, and full-scale systems, including boilers and power generation facilities. Mr. DeWall has extensive training in emission testing, sampling, and analyses. Mr. DeWall has extensive knowledge of analytical instrumentation utilized in mercury emission sampling. Mr. DeWall is a member of the American Chemical Society and has coauthored numerous publications.