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REGULATION GUIDANCE: Title 22 California Code of Regulations section 66265.192(a) Owners or operators of new tank systems or components shall ensure that the foundation, structural support, seams, connections, and pressure controls (if applicable) are adequately designed and that the tank system has sufficient structural strength, compatibility with the waste(s)to be transferred, stored or treated, and corrosion protection so that it will not collapse, rupture, or fail.The owner or operator shall obtain a written assessment reviewed and certified by an independent, qualified, professional engineer, registered in California in accordance with section 66270.11(d) attesting that the system has sufficient structural integrity, is acceptable for the transferring, storing and treating of hazardous waste, and that the tanks and containment system are suitably designed to achieve the requirements of this article.This assessment shall be obtained prior to placing the tank system in service, and shall be kept on file at the facility. This assessment shall also include, at a minimum,the following information: (1) design standard(s) according to which the tank(s) and ancillary equipment are or will be constructed; (2) hazardous characteristics of the waste(s)to be handled; (3)for new tank systems or components in which the external shell of a metal tank or any external metal component of the tank system is or will be in contact with the soil or with water, a determination by a corrosion expert of: (A)factors affecting the potential for corrosion, including but not limited to: 1. soil moisture content; 2. soil pH; 3. soil sulfides level; 4. soil resistivity; 5. structure to soil potential; 6. influence of nearby underground metal structures (e.g., piping); 7. stray electric current; and, 8. existing corrosion-protection measures (e.g., coating, cathodic protection), and (B)the type and degree of external corrosion protection that are needed to ensure the integrity of the tank system during the use of the tank system or component, consisting of one or more of the following: 1. corrosion-resistant materials of construction such as special alloys or fiberglass-reinforced plastic; 2. corrosion-resistant coating (such as epoxy or fiberglass)with cathodic protection (e.g., impressed current or sacrificial anodes); and 3. electrical isolation devices such as insulating joints and flanges;