California

Immissionsmessung Seehausen der Stahlwerke Bremen (Arcelor-Mittal) - Bremen

ERM GmbH - Neu-Isenburg

Green Ports (Hamburg) GmbH - Hamburg

Base Tech - Kassel

Umwelt-baut-bruecken - Bindlach

Michael Helbing Arbeitsschutzbüro - Vogtei

WILBOIS Waste Disposal and Environmental Services - Merzig

Consulting & Engineering Services - Wofford Heights, California

Environmental Waste Management Ltd - Epping

Helena Chemical - Calipatria, California