An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Can a containment wall be constructed out of concrete blocks?

Yes.  SPCC regulations do not mandate design specifications, rather, they are performance based.  Therefore, a containment wall may be of any construction type, material, or design, assuming it meets the performance standards and requirements of Part 112.  Regional offices can help determine whether individual containment equipment meets the performance standards of Part 112.