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Double Fill Configuration <br /> 1. OPW Double Fill Configuration shall be allowed for installation provided that no <br /> more than two fill and two vapor return points are installed on any single <br /> underground storage tank and that no offset of the vapor recovery riser pipe is <br /> installed. An example of a OPW Dual Fill configuration in shown in Figure 2C. <br /> 2. The OPW Double Fill Configuration can also be used in the single fill mode if <br /> applicable. However, if used in double fill configuration, two vapor return hoses <br /> shall be connected to the dual fill configuration with at least one connection to <br /> each cargo tank(s) used to simultaneously deliver gasoline through two product <br /> hoses into a single tank. <br /> Vapor Recovery Riser Offset <br /> 1. The vapor recovery tank riser may be offset from the tank connection to the vapor <br /> recovery Spill Container provided that the maximum horizontal distance (offset <br /> distance) does not exceed 20 inches. One example of an offset is shown in <br /> Figure 2E. <br /> 2. The vapor recovery riser shall be offset up to 20 inches horizontal distance with <br /> use of commercially available, 4 inch diameter steel pipe fittings. <br /> Tank Gauge Port Components <br /> The tank gauge adaptor and cap are paired. Therefore, an adaptor manufactured by <br /> one company shall be used only with a cap manufactured by the same company. <br /> Connections and Fittings <br /> All connections and fittings not specifically certified with an allowable leak rate shall not <br /> leak. The absence of vapor leaks may be verified with the use of commercial liquid leak <br /> detection solution (LDS) or by bagging, when the vapor containment space of the <br /> underground storage tank is subjected to a non-zero gauge pressure. (Note: leak <br /> detection solution will detect leaks only when positive gauge pressure exists). <br /> Maintenance Records <br /> Each GDF operator/owner shall keep records of maintenance performed at the facility. <br /> Such record shall be maintained on site or in accordance with district requirements or <br /> policies. The records shall include the maintenance or test date, repair date to correct <br /> test failure, maintenance or test performed, affiliation, telephone number, and name of <br /> individual conducting maintenance or test. An example of a Phase I Maintenance <br /> Record is shown in Figure 2F. <br /> Executive Order VR-102-E, OPW Phase I Vapor Recovery System, Exhibit 2, Page 4 <br />