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§112.12(c)(6)(ii) for AFVO containers that meet certain criteria (see Section 7.2.4). A facility owner/operator with AFVO bulk storage containers may follow an applicable industry standard, such as API 653, to conduct inspections in accordance with the requirements of §112.12(c)(6)(i), follow the requirements of §112.12(c)(6)(ii) (if applicable), or provide an environmentally equivalent measure in the SPCC Plan in accordance with §112.7(a)(2) of the SPCC rule. The facility owner or operator has flexibility to make an environmental equivalence determination, in accordance with §112.7(a)(2), to address those bulk storage containers that have alternative configurations and meet the intent of the criteria in §112.12(c)(6)(ii) to minimize internal and external corrosion of the container and allow personnel to visually identify a discharge. For example, the criteria in §112.12(c)(6)(ii) requires that bulk storage containers be subject to 21 CFR part 110. However, bulk storage containers that store food oil and are built according to industry standards (such as 3—A Sanitary Standards) may have additional design features to minimize internal and external corrosion of the container and allow for visual detection of a discharge that provide equivalent environmental protection to 21 CFR part 110. Container configurations built according to 3—A Sanitary Standards typically include "manholes" that facilitate complete access for examination of the entire internal surface. These containers also typically have an outer shell (i.e., a double wall) that is sealed completely such as with completely welded seams so that the container integrity is maintained because insulation is less likely to be exposed to moisture. If a hybrid inspection program is used to meet the integrity testing requirements in §112.12(c)(6), the Plan must state the reasons for nonconformance and explain how the hybrid inspection program provides equivalent environmental protection. The Plan should also address how the program effectively minimizes the risk of container failure and allows detection of leaks before they become significant. A PE must review and certify the environmental equivalence determination. If a PE develops a hybrid inspection program for a facility, rather than uses an applicable industry standard, then the PE must describe why the hybrid inspection program does not follow the applicable industry consensus standard and how the hybrid inspection program is environmentally equivalent to the industry standard and meets the minimal recommended elements described in Section 7.5.3. 7.5.3 Suggested Minimum Elements fora PE -Developed Site -Specific Integrity Testing Program (Hybrid Inspection Program) Although EPA requires inspection, evaluation, and testing in accordance with industry standards, it does not require that inspections and tests be performed according to a specific standard. Consistent with the environmental equivalence provision in §112.7(a)(2), the PE may use industry standards along with other good engineering practices to develop a customized inspection and testing program for the facility (a "hybrid" inspection program), considering the equipment type and condition, characteristics of products stored and handled at the facility, and other site-specific factors. The PE may also develop a hybrid program in the rare cases where industry standards do not apply to a container. The hybrid program should be designed to measure the structural soundness of a container shell, bottom, and/or floor to contain oil, and may include leak testing to determine whether the container will discharge oil. The components of a hybrid inspection program would likely include frequent visual inspections by the owner as well as periodic formal inspections (plus integrity testing, as SPCC GUIDANCE FOR REGIONAL INSPECTORS 7-48 December 16, 2013