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This requirement must be met in order to continue use of the underground storage tank. The owner of the underground storage system will be required to make upgrades in order to meet 1998 upgrade requirments . This Department requires that all sites that plan to use single wall fiberglass tanks, lined tanks or a lining process to meet 1998 upgrade requirements have a site assessment conducted. The site assessment must be conducted in accordance with PHS-EHD Policy number 96-004 (copy provided) . If contamination is encountered during the site assessment it will be considered an unauthorized release and Health and Safety Code Section 25296 (c) may apply. Section 25296 allows PHS-EHD to require the installation of a continuous onitored monitoring well . The requirement for a continuousl ztored monitoring well may be waived if the tank system i e d with a continuous monitoring system that meets c 3 standards . The tanks must be equiped with s fill protection in accordance with Title 23 CCR Sec on 5 (provided below) . 523-2665. 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. 523-2635. Installation and Testing Requirements for All New Underground Storage Tanks. (b) All underground storage tanks shall be equipped with a spill container and an overfill prevention system as follows: (1) The spill container shall collect any hazardous substances spilled during product delivery operations to prevent the hazardous substance from entering the subsurface environment. The spill container shall meet the following requirements: (A) If it is made of metal, the exterior wall shall be protected from galvanic corrosion. (e) It shall have a minimum capacity of five gallons (19 liters) . (C) It shall have a drain valve which allows drainage of the collected spill into the primary container or provide a means to keep the spill container empty. (2) The overfill prevention system shall not allow for manual override and shall meet one of the following requirements: (A) Alert the transfer operator when the tank is 90 percent full by restricting the flow into the tank or triggering an audible and visual alarm; or (B) Restrict delivery of flow to the tank at least 30 minutes before the tank overfills, provided the restriction occurs when the tank is filled to no more than 95 percent of capacity; and activate an audible alarm at least five minutes before the tank overfills; or (C) Provide positive shut-off of flow to the tank when the tank is filled to no more than 95 percent of capacity; or, located onethestopvofshut-off of the tank arelow to exposedht tank poductthat due tonone fittings overfilling. (3) The local agency may waive the requirement for overfill prevention equipment where the tank inlet ill overfill, andithe tank system islfilled bythe transferscontainer mores thang25tgallonsate to collect any one time. The piping system will require upgrading if it is constructed of single wall steel and was not cathodically protected from the point of its original installation. The piping must be upgraded to meet Title 23 CCR Section 2666 (provided below) . (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.