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VR-202-Z -6 Exhibit 2 2. All vapor return lines shall have a minimum slope of 1/8 inch per foot from the dispenser riser to the riser of the underground storage tank (UST). A slope of 1/4 inch or more per foot is recommended wherever feasible. The vapor return path from any dispenser riser to the UST shall be free of liquid or fixed blockage. Exception: When it is not possible to achieve the necessary minimum slope from the dispenser back to the underground storage tanks, a low point Liquid Condensate Trap (i.e. knock out pot, thief port) can be utilized as long as the conditions under Liquid Condensate Traps in this Exhibit 2 are met. 3. The dispenser shall be connected to the riser with either flexible or rigid material that is listed for use with gasoline. The dispenser-to-riser connection shall be installed so that any liquid in the lines will drain toward the gasoline storage tank. The internal diameter of the connector, including all fittings, shall not be less than one-half inch (1/2"). Note: The dispenser-to-riser connection is defined as the piping connection between the outlet of the vapor flow meter and the inlet of the dispenser riser. A vapor shear valve may also be part of the riser connection. 4. There is no length restriction for the vapor return piping of the system as long as the system complies with the maximum pressure drop requirement of Item 1 (or the V/L option). 5. No product shall be dispensed from any fueling point at a GDF installed with the Assist Phase II EVR System Including In-Station Diagnostics (ISD) Systems if there is a vapor line that is disconnected and open to the atmosphere. Dispenser Vapor Piping 1. Any dispenser with a dispenser piping test valve in the closed position shall be considered a defect. 2. The ball valve shall be installed between the test port and the vacuum pump. The ball valve and test port shall be located on the inlet side of the vacuum pump. 3. If the vapor flow meter is installed below the vapor shear valve, then a "Y" fitting for introducing liquid shall be installed below the vapor flow meter. 4. The vapor flow meter shall be installed on the down stream side of the vacuum pump. 5. The Vapor Pressure Sensor shall be installed into one of the dispensers at the GDF located closest to the underground storage tanks (If a row of dispensers are equal distance from the gasoline tank pad and within 10' of each other, any dispenser can be used).