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n The tank in this study was determined to provide 110% containment of the largest volume contained within the containment. Please refer to attached Figure 1. OS inspects all tank containments on a daily basis and leak detection is accomplished by electronic level detection system with audible and visual alarms and visual observation of any potential liquid leaks into the secondary and tertiary containment. 15.0 CCR Title 22. §66265.194 — General Operating Requirements (a) Hazardous wastes or treatment reagents shall not be placed in a tank system if they could cause the tank, its ancillary equipment, or the secondary containment system to rupture, leak, corrode, or otherwise fail. (b) The owner or operator shall use appropriate controls and practices to prevent spills and overflows from tank or secondary containment systems. These include at a minimum: (1) spill prevention controls (e.g., check valves, dry discount couplings); (2) overfill prevention controls (e.g., level sensing devices, high level alarms, automatic feed cutoff, or bypass to a standby tank);and (3) maintenance of sufficient freeboard in uncovered tanks to prevent overtopping by wave or wind action or by precipitation. Uncovered tanks shall be operated to ensure at r� least 60 centimeters (2 feet) of freeboard, unless the tank is equipped with a containment structure (e.g., dike or trench), a drainage control system or a diversion structure (e.g., standby tank) with a capacity that equals or exceeds the volume of the top 60 centimeters (2 feet) of the tank. (c) The owner or operator shall comply with the requirements of section 66265.196 if leak or spill occurs in the tank system. (d) Transfer, treatment or storage of hazardous waste in tanks shall comply with section 66265.17(b). OS will operate the system per the specified requirements. Hazardous Waste Tank Assessment Report Martin Consulting Oil Stop,301 W. Kettleman Lane Page 22 of 29 Group,Inc.—Structural Design