Environmental Containment Rings (ECR) provides a complete secondary containment system with design, engineering and installation supervision. Our systems are made of 10 gauge galvanized, corrugated steel walls which are double row bolted and sealed with a isobutylene isopreen copolymer tape. The bottom of our system is a geosynthetic clay liner (GCL) which is sealed with bentonite and topped with six inches of washed pea gravel to protect the liner and provide moisture retention. Our system will give you protection from horizontal and vertical migration in the event of a spill.