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VR-202-Z -3 Exhibit 2 Clean Air Separator Pressure Management System 1 . The Clean Air Separator is a passive gasoline storage tank ullage pressure management system, with no electrical requirements. The Clean Air Separator vapor integrity shall be evaluated using the test procedure outlined in Exhibit 4 of this Executive Order. a. The system shall be removed from service when the Clean Air Separator fails the leak decay test outlined in Exhibit 4. b. Unless there is maintenance or testing being conducted on the Clean Air Separator, the system shall be removed from service when the four ball valves are not locked in the positions shown in Figure 2-2 or 2-2H for normal Clean Air Separator operation. Figure 2-2 applies to vertical Clean Air Separator installations and Figure 2-21-1 applies to horizontal Clean Air Separator installations. 2. The Clean Air Separator shall be installed within 100 feet from the vent line(s), and the associated piping shall be sloped 1/8" per foot minimum toward the vent line(s). Permeator AT-150 Pressure Management System 1. The Permeator AT-150 is an active gasoline storage tank pressure management system. a. The system vapor integrity shall be evaluated when conducting TP-201 .3 in conjunction with Exhibit 8. It has zero allowable leak rate. b. The system shall be removed from service when the Permeator AT-150 fails the compliance test outlined in Exhibit 15. 2. The Permeator AT-150 shall be installed within 10 feet of the vent line(s) using 2" inner diameter steel piping. The associated piping shall be 1/8" per foot minimum slope toward the vent line(s). Low resistance ("straight-through") 2" ball valves should be plumbed into these connection points to allow for processor isolation. Figure 2-7A shows a typical Single Inlet with Single Return on a 2 UST system. Figure 2-8A shows a typical Single Inlet with Single Return on a 3 UST system. Figure 2-9A shows a typical Dual Inlet with Single Return on a 3 UST system. Figure 2-10A shows a typical Single Vent Inlet (Manifold at UST) with Single Return on Multiple UST system. 3. Typical installation of the Permeator AT-150 is to draw in the ullage air/vapor mixture from the UST system through the highest grade tank and to return a higher saturation vapor mixture to the lowest grade tank. The total piping distance from the highest grade tank to the vent line(s) shall be no longer than 90 feet with a minimum inner pipe diameter of 2". This configuration can work for GDF's with 2 or more UST's. Figure 2-713 shows a typical piping layout for Single Inlet with Single Return on a 2 UST system.