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PIMOR how The concrete and steel secondary containment structures as well as the spill pallets for drums utilized on Site are sufficiently impervious for the materials being stored. Details of each containment area are summarized in Table 1, Appendix B. 17.2.3 Draining Secondary Containment Areas — §112.8(c)(3) Precipitation accumulation within the containment structure is removed through evaporation. If an oil sheen is observed within the secondary containment structure, the oil shall be removed with vacuum truck, oil absorbent pads, or other equivalent method. Recovered oil and oil-saturated materials shall be recycled or disposed of in accordance with federal, state, and local regulations. If evaporation is not sufficient to removed accumulated precipitation, a vacuum truck will be utilized to prevent discharge from the secondary containment area. Facility personnel are present for the entire duration of the drainage event. If the water is not clean, it is not released but removed by vacuum truck and properly disposed. A Containment Drainage Log is kept showing the dates that drainage was conducted (Appendix F). 17.2.4 Buried Metallic Storage Tanks — §112.8(c)(4) There are no buried metallic storage tanks installed at the Facility. Therefore, this section is not applicable. 17.2.5 Partially Buried Metallic Storage Tanks — §112.8(c)(5) There are no partially buried metallic storage tanks at the Facility. Therefore, this section is not applicable. 17.2.6 Periodic Integrity Testing — §112.8(c)(6) The Facility container inspections comply with the requirements in 40 CFR 112.8(c)(6) and California Health and Safety Code Sections 25270 to 25270.13. The STI SP001 standard is utilized for the "certified" inspection of the ASTs at the Facility. In accordance with SP001, ASTs with a capacity of less than or equal to 5,000 gallons need only have periodic external visual inspections. The SP001 standard requires that the owner or his designee perform and document a periodic, visual, non- destructive inspection of each AST at least monthly, in accordance with the provisions and the checklists provided in SP001. This inspection must be performed by a person that is knowledgeable of the storage facility operations, the AST and its associated components, and the characteristics of the liquid stored, and meets the qualifications stipulated in SP001. The routine inspections focus specifically on detecting any change in conditions or signs of product leakage from the AST, piping system, and appurtenances. In accordance with inspection procedures outlined in this SPCC Plan, if signs of leakage or deterioration from the AST are observed by facility personnel, they are immediately reported to the Environmental Specialist who will then contract to have the AST inspected by an STI SP001 tank certified inspector to assess its suitability for continued service. Facility personnel who conduct the monthly inspections of the bulk oil storage containers are qualified in accordance with SP001. The AST's physical configuration, combined with monthly inspections, ensures that any small leak that could develop in the tank shell will be detected before it can become significant, escape secondary containment, and reach the environment. This approach provides equivalent environmental protection to the non-destructive shell evaluation component of GHD I Spill Prevention, Control,and Countermeasure(SPCC)Plan 111189093(1)l Page 10