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Andrew Stoddard is a principal environmental engineer at AndrewStoddard & Associates, Hamilton, Virginia. Jon Harcum is a principal engineer at Tetra Tech, Inc., LasCruces, New Mexico. Jonathan Simpson is a senior scientist at Tetra Tech, Inc.,Fairfax, Virginia. James R. Pagenkopf is a vice president at Tetra Tech, Inc.,Fairfax, Virginia. Robert K. Bastian is a senior environmental scientist with theU.S. Environmental Protection Agency, Office of WastewaterManagement, Washington, D.C.
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