General Documents Terms ISO 9001 (TÜV Rheinland) - Certified Management System Certified Specialist Documentation in compliance with sec. 19I Water Management Act (German WHG) Manufacturer's instructions for transport, installation, operation and cleaning: Circular tanks made of GRP coatings with thermoplastic liner and thermoplastic circular tanks made of PE and PP Rectangular tanks made of GRP coatings with thermoplastic liner and thermoplastic rectangular tanks made of PE and PP