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Brown Sand,Inc. Spill Prevention, Control, and Countermeasures Plan Page: 22 June 3, 2020 • All aboveground tanks, associated piping, and dispensers are visually inspected for any corrosion, cracks, leaks, damage, or any failure or potential failure to the integrity of the system. In addition, the foundation supporting the tank will be inspected for instability or excess settlement. • The interstitial space of the double walled tanks is inspected for liquid,rust, or any other debris. • Containment structures are inspected for any cracks or leaks, and the structure is inspected for overall integrity. • All piping connections, joints, and seals are inspected to determine their condition, and repairs are made as necessary. • Liquid level gauges are inspected for all tanks to make sure they are in proper working condition and readable. Periodic Integrity Testing(CFR 40112.7(a)(2).): Integrity testing, above and beyond the visual inspections described above, is required for all aboveground storage tanks, utilizing a non-destructive shell testing technique in accordance with good engineering practices and in accordance with SP001 standards, or provide equivalent environmental protection per CFR 40 112.7(a)(2). Testing is to be performed on a regular schedule, as well as when repairs are made to storage containers which may increase the potential for a tank failure. As stated in the SPCC 2002 final rule, "testing on a regular schedule" means testing per industry standard or at a frequency sufficient to prevent a discharge. Records of all integrity testing will be maintained on site. Integrity Testing Schedule: The inspection schedule for all aboveground storage tanks is based on the industry standards outlined in the Steel Tank Institute (STI) SP001 guidelines. Each tank is evaluated individually to determine the frequency of testing and type of testing required based on the AST's size, type of installation (shop build or field constructed), age, corrosion rate, and previous inspection history. Environmental equivalent measures utilized in place of integrity testing is acceptable only for shop- built containers that have measures in place which effectively minimize the risk of a failure to the environment and allow for leak detection prior to a significant leak occurring. Based on the AST category, tanks will be inspected either by Brown Sand, Inc. or by a licensed certified inspector. It is recommended that all Category 1 tanks of unknown age be inspected within six (6) months. Periodic inspections conducted by Brown Sand, Inc. will be conducted by personnel knowledgeable of the tanks and their components. Below is the AST integrity testing table for all