To be either Tier 1 or Tier 2 qualified, a facility must meet the following criteria:
Near water;
No single oil spill larger than 1,000 gallons to nearby water; and
No two spills within a 12-month period exceeding 42 gallons each to nearby water.
Qualified tier 1 and tier 2 facilities can use the corresponding SPCC plan template to build their own SPCC plan, which can then be used for self-certification. For facilities with more than 10,000 gallons aboveground capacity or those located in states that do not allow self-certification, their SPCC plan will need to be certified by a professional engineer.