Economical, low-profile secondary containment platforms are eco-friendly. Made of black, 100% recycled, post-industrial, durable polyethylene. Yellow version is made from 45% recycled content. Nearly impervious to chemicals, including acids and corrosives. Seamless design ensures any leaks or spills are captured in sump before reaching floor drains or creating a slip hazard. Sturdy grates are nearly 2 1/2" thick for superior crack resistance, self-locating, reduce chance of grate "ride-up" and remove for easy cleaning. Modular centers allow for creating a customized system using optional joining clips to firmly lock units together to expand storage space. Sumps remain separate and clips can be removed for easy repositioning. Optional Sump-to-Sump™ drain kit allows centers to be joined together on-site for full compliance to EPA and fire codes when combined sump capacities need to meet 71 gals. Six- and eight-drum centers meet or exceed regulations; EPA 40 CFR 264.175, NFPA 1 the Uniform Fire Code 184.108.40.206, Spill Prevention, Control and Countermeasures (SPCC) Compliant, NFPA 30 9.13.1 and OSHA 29 CFR 1910.106(e)(2)(iii).