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Cal.Code Regs.Title 23, Division 3,Chapter 16, Underground Tank Regulations (7) Before installing a bladder, thin areas or other flaws in the underground storage tank walls that need additional reinforcing shall be reinforced in accordance with section 2661(d). (8) If required by manufacturers' specifications or the special inspector, the underground storage tank shall be lined in accordance with section 2663 prior to installation of the bladder only to the thickness deemed necessary by the more stringent requirement of the manufacturers'specifications or the special inspector. Authority.Sections 25299.3 and 25299.7, Health and Safety Code. Reference:Sections 25292 and 25292.1,Health and Safety Code;40 CFR 280.21, 280.32(d)and 281.33. 2665 SPILL AND OVERFILL PREVENTION EQUIPMENT UPGRADE REQUIREMENTS By December 22, 1998, all underground storage tank systems shall be retrofitted with an overfill prevention system and a spill container which meet the requirements of section 2635(b). The local agency may waive the requirements for overfill prevention equipment if the conditions specified in section 2635(b)(3) are met. Authority:Sections 25299.3 and 25299.7,Health and Safety Code. Reference:Sections 25292 and 25292.1,Health and Safety Code;40 CFR 280.21. 2666 REQUIREMENTS FOR UPGRADING UNDERGROUND PIPING (a) By December 22, 1998, all underground piping containing hazardous substances other than motor vehicle fuel shall be retrofitted with secondary containment meeting the requirements of section 2636. (b) By December 22, 1998, all underground piping containing motor vehicle fuel and connected to an existing tank shall be retrofitted with secondary containment unless the owner or operator demonstrates to the local agency that the piping is constructed of fiberglass reinforced plastic, catholically protected steel, or other materials compatible with stored products and resistant to corrosion. The secondary containment system shall meet the construction, installation, and monitoring requirements of section 2636. (c) By December 22, 1998, all automatic line leak detectors for underground pressurized piping which is not secondarily contained shall be capable of shutting off the pump when a release occurs. In addition, the pumping system shall shut down automatically if the automatic line leak detector fails or is disconnected. In lieu of the above, for underground storage tank emergency generator systems, the leak detector must be connected to an audible and visible alarm to indicate a release malfunction of the system. (d) All underground piping and secondary containment shall be tested for tightness after installation in accordance with section 2636(e). - 70-