COMPLIANCE INFO_1987-1998 - Laserfiche WebLink

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a RE: The underground storage tanks located at the above referenced facility have been interior lined. In order for the tank system to remain in compliance with this Department and the State Water Resources Control Board, there are some requirements that need to be met by the tank owner. The tank owner must comply with Title 23 CCR Section # 2663 (h) 1-9 (provided below) . (h) If a steel tank is lined for the purpose of satisfying the requirements of section 2662(c), or if any tank is repaired using the interior lining method, it shall be inspected by a coatings expert or special inspector within ten years of lining and every five years thereafter. Written certification of the inspection shall be provided by the tank owner and the party performing the inspection to the local agency within 30 calendar days of completion of the inspection. The inspection shall include all of the following: (1) Determining that the tank has been cleaned so that no residue remains on the tank walls. (2) Determining that the tank has been vacuum tested at a vacuum of 5.3 inches of Hg for no less than one minute. This vacuum test is not required if the tank is constructed of fiberglass and is submerged in groundwater by more than 50� of its depth. (3) If the tank is constructed of fiberglass, taking interior diameter measurements to verify whether the cross-section has compressed by more than one percent of the original diameter. (4) Visually checking the tank interior and lining for discontinuity,compression, tension cracking, and corrosion. (5) For steel tanks, testing the entire tank interior using a thickness gauge on a one-foot grid pattern with metal wall thickness recorded on a form that identifies the location of each reading in order to verify that average metal thickness is greater than 75 percent of the original wall thickness. (6) Testing for thickness and hardness of the lining in accordance with nationally recognized industry codes to verify that the lining meets the standards under which the lining was applied. (7) For steel tanks, testing the lining using an electrical resistance holiday detector in accordance with nationally-recognized industry codes. The owner or operator shall have all holidays repaired and checked in accordance with nationally recognized industry codes. (8) Certification from the special inspector or coatings expert that: (A) the tank is suitable for continued use for a minimum of five years. (B) the tank is suitable for continued use for a minimum of five years only if it is relined or other improvements are made. (C) the tank is no longer suitable for continued use and shall be closed in accordance with Article 7. (9) A lined tank shall be closed in accordance with Article 7 at the end of its operational life.