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Further, SP001 divides ASTs into 3 categories. Tank installations are classified based on <br />whether they have safeguards to prevent spills from entering the environment. The <br />determination of which category is applicable for a specific tank is the responsibility of the tank <br />owner, but the owner should consult the SPCC Plan for the facility, if applicable. <br />Examples of the tank categories follows: <br />4 <br />41 <br />Category 1 - AM with spill control, and with CRDM <br />Double-wall tank <br />Double -bottom tank <br />in concrete dike <br />Category 2Z ASTs with spill control and without CRDM <br />Single-wall tanks in earthen berm <br />7 <br />