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r Executive Order G-70-164,Exhibit 2 page 7 <br /> require the station operator to maintain a log documenting regular evacuation of the <br /> condensate trap to ensure that these devices do not block the vapor path to the <br /> underground storage tank. <br /> Storagg Tank and Phase I System <br /> WARNING: Phase I fill caps should be opened with caution because the storage lank may <br /> be under pressure. <br /> 1. The local district may require the installation of a threaded tap at least 1/8" in diameter at <br /> which the underground storage tank (UST) pressure may be monitored. The tap may be in <br /> the dispenser riser connection or on the vent line, and shall be accessible for connection to <br /> a pressure gauge. One tap is adequate for manifolded systems. The tap shall remain <br /> plugged and vapor tight except when test equipment is being connected to or removed <br /> from it. The system shall not be allowed to operate when the taps are not vapor tight. If <br /> located on the vent line, the tap shall be at least six feet (6) and not more than eight feet <br /> (8') above grade. A high-quality quick-connect fitting with a vapor-tight cap may be <br /> installed instead of a plug if specified by the district. <br /> Note: Frequent venting (except when caused by air ingested into the system during the <br /> performance of the A/L ratio test, Phase I activities, or other events not specifically caused <br /> by the Phase II system) may indicate system malfunction. <br /> 2. The Phase I system shall be a CARB-certified system which is in good working order and <br /> which demonstrates compliance with the static pressure decay test criteria contained in <br /> Exhibit 3 of this Order. Coaxial Phase I systems shall not be used with new installations of <br /> the system. Replacement of storage tanks at existing facilities, or modifications which <br /> cause the installation of new or replacement Phase I vapor recovery equipment, are <br /> considered new installations with regard to this prohibition. An exception to this prohibition <br /> may be made for coaxial Phase I systems CARB-certified after January 1, 1994, as <br /> compatible for use with Phase II systems which require pressure/vacuum vent valves. <br /> Where installation of the VCP-3A system is made by retrofitting previously installed <br /> equipment, local districts may elect to allow existing coaxial Phase I systems to remain in <br /> use for a specifically identified period of time provided the following conditions are met: <br /> • the existing coaxial Phase I system is a poppeted, CARB-certified system capable <br /> of demonstrating compliance with the static pressure decay test as specified above; <br /> and <br /> • installation of the Phase II system requires no modification of the UST(s) and/or <br /> connections. <br /> 3. Spill containment manholes which have drain valves shall demonstrate compliance with the <br /> static pressure decay criteria with the drain valves installed as in normal operation. <br /> Manholes with cover-actuated drain valves shall not be used in new installations (as <br /> defined above) after May 1, 1995. Manholes with cover-actuated drain valves may remain <br /> in use in facilities where installation of the Hasstech VCP-3A system does not require <br /> modification of the tank fittings provided the facility demonstrates compliance with static <br /> pressure decay test criteria both with the cover open and with the cover closed. The local <br />