This document outlines financial responsibility requirements for petroleum underground storage tank (UST) owners and operators. It states that all owners/operators must comply with regulations and maintain a minimum level of insurance coverage per occurrence and in aggregate, depending on the amount of product handled monthly. It also lists the acceptable financial responsibility assurance mechanisms and notes that owners must be able to pay for cleanup costs or third-party liability from a leak. Owners must maintain financial coverage until tanks are permanently closed and contamination is cleaned up.