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VR-202-Z -4 Exhibit 2 Figure 2-813 shows a typical piping layout for Single Inlet with Single Return on a 3 UST system. Figure 2-913 shows a typical piping layout for Dual Inlet with Single Return on a 3 UST system. Figure 2-10B shows a typical piping layout for a Single Vent Inlet (Manifold at UST) with Single Return on 3 UST system. 4. For GDF sites where the highest grade tank has a piping distance above 90 feet, it is permissible for a manifold of multiple UST's, regardless of fuel grade, provided that the total piping distance for one of the tanks in the manifold to the vent line(s) shall be no longer than 90 feet with a minimum inner pipe diameter of 2" for the draw in of ullage air/vapor mixture and there is still one lowest grade tank for the return of the higher saturation vapor mixture. See Figure 2-9A and Figure 2-913 for reference. 5. The Permeator AT-150 can only be operated on GDF installations that have the Veeder-Root Version 1.06 In-Station Diagnostics (ISD) software installed. 6. The Permeator AT-150 constantly logs oil level, processor on/off condition, vacuum level and tank pressure. 7. The Permeator AT-150 Programmable Logic Controller (PLC, display) constantly monitors PLC battery level and circuit continuity. 8. Except for testing, repairs or maintenance activities, the Permeator AT-150 shall be operating at all times with the ball valves in the `open' position with either the handles locked in place or the handles removed and locked inside the Permeator cabinet. 9. Maintenance requirements for the Permeator system are provided in the Permeator AT-150 Installation, Operation and Maintenance Manual that is part of the CARB-Approved Installation, Operation and Maintenance Manual and are summarized in the table below: Maintenance Interval Maintenance 5000 hours Drain and Replace Oil in Vacuum Pump Pressure/Vacuum Vent Valves for Gasoline Storage Tank Vents 1. All P/V vent valves shall be a CARB-certified P/V vent valve for a Phase I system. 2. At least one pressure/vacuum (P/V) vent valve shall be installed on each gasoline storage tank vent. The maximum number of P/V vent valves allowed and P/V vent valve performance specifications are listed in the applicable Phase I EVR Executive Order. Vent lines may be manifold to minimize the number of P/V vent valves and potential leak sources, provided the manifold conforms to all applicable fire regulations. At least one P/V vent valve shall be installed on vents if a manifold is incorporated. Figure 2-3 or 2-3H shows a typical manifold configuration for a single P/V vent valve with the Clean Air Separator. If two or more P/V vent valves are desired, they shall be installed in parallel, so that each can serve as a backup to the other if one should fail to open properly. Figure 2-4 or 2-4H shows a typical manifold configuration for two P/V vent valves installed in parallel with the Clean Air Separator.