These containment units safely store either two or four drums outdoors. The P2 Plus meets EPA Container Storage regulation 40 CFR 264.175 and Uniform Fire code Spill Containment Regulations as well as helps meet new Stormwater Management Regulations-- NPDES, 40 CFR 122.26 (1999). Dimensions - 67 1/4” x 41 1/4” x 74”.The P4 Plus features roll-top covers that can be easily lifted from waist height to access drum tops, eliminating the need to reach near ground level. The low profile (8 3/4”) containment pallet positions drumtops at a safe, convenient level to pour wastes into funnels or to use drum pumps. The forkliftable, lockable, all-polyethylene construction will not rust or corrode. Dimensions- 64 1/2” x 62” x 79”.