Description EMCO A1004EVR-317S Double Wall Spill Containment. The A1004EVR Series spill containers are Phase I EVR?Certified under Executive Order VR-105. Replaces A1004EVR-211S Key Features Easily repair or replace primary & secondary units from grade without breaking concrete Nominal capacity of 5 US gallons Drain valve w/ filter or plug option EZ-Gage or float sensor for interstitial monitoring of secondary containment