525 W. Monroe St., Suite 1050 Chicago, IL 60661
4580 Weaver Parkway, Suite 100 Warrenville, IL 60555
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(312) 999-4200 tel (312) 999-4299 fax
Contact Albert V. Karvelis, Ph.D., P.E. Principal Engineer
(630) 658-7500 tel (630) 658-7599 fax