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0 0 <br /> (D) Provide positive shut-off of flow to the tank so that none of the fittings <br /> located on the top of the tank are exposed to product due to overfilling. <br /> (3) The local agency may waive the requirement for overfill prevention equipment where the <br /> tank inlet exists in an observable area, the spill container is adequate to collect any <br /> overfill, and the tank system is filled by transfers of no more than 25 gallons at one <br /> time. <br /> The piping system will require upgrading if it is constructed of <br /> single wall steel and was not cathodically protected from the <br /> point of its original installation. The piping must be upgraded <br /> to meet Title 23 CCR Section 2666 (provided below) . <br /> (a) By December 22, 1998, all underground piping containing hazardous substances other <br /> than motor vehicle fuel shall be retrofitted with secondary containment meeting the <br /> requirements of section 2636. <br /> (b) By December 22, 1998, all underground piping containing motor vehicle fuel and <br /> connected to an existing tank shall be retrofitted with secondary containment unless the <br /> owner or operator demonstrates to the local agency that the piping is constructed of <br /> fiberglass reinforced plastic, cathodically protected steel, or other materials compatible <br /> with stored products and resistant to corrosion. The secondary containment system shall <br /> meet the construction, installation, and monitoring requirements of section 2636. <br /> (c) By December 22, 1998, all automatic line leak detectors for underground pressurized <br /> piping which is not secondarily contained shall be capable of shutting off the pump when a <br /> release occurs. in addition, the pumping system shall shut down automatically if the <br /> automatic line leak detector fails or is disconnected. in lieu of the above, for <br /> underground storage tank emergency generator systems, the leak detector must be connected <br /> to an audible and visible alarm to indicate a release malfunction of the system. <br /> (d) All underground piping and secondary containment shall be tested for tightness after <br /> installation in accordance with section 2636(e) . <br /> If you have any questions please contact me at (209) 468-0332 <br /> Ernest M. Fujimoto MD, M. P.H. <br /> Acting Health Officer <br /> Robert McClellon R.E .H. S . <br /> Environmental Health Division <br />