Fibertec Environmental Services is a full service environmental analytical laboratory, specializing in environmental analysis ... , subsurface investigations, and natural gas analysis. Our corporate headquarters and analytical laboratory are located in Holt, Mich., our office in Brighton, Mich., specializes in subsurface investigations, such as Geoprobe and drilling operations, and our satellite laboratory is located in Cadillac, Mich., servicing northern Michigan. . read more