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OPW Installation, Operation, and Maintenance Manual, Page 73 signal that the tank is full. Close transport delivery valve and drain hose into tank before disconnecting any hose fitting. Overfilled Tank: Failure of the hose to drain after clos- ing the delivery valve signals an overfilled tank. Do Not disconnect any delivery hose fitting until the liquid level in the tank has been lowered to allow the hose to drain into the tank. WARNING In the event you are splashed with fuel remove wet clothing immediately. Skin contact with gasoline can cause chemical burns and may result in Inhalation of vapors that maybe fatal. Nevergo inside confined areas after being splashed and never go near ignition sources. Determine ifthe underground storage tank is equipped with a ball float vent valve, as illustrated in Figure 16. In all systems, the sh ut-off point of the 61 SO must be reached before the ball float reduces flow to ensure proper overfill valve operation. TOOLS NEEDED FOR INSTALLATION AND ASSEM- BLY: 1. Drill 2. A sharp 1/8" pilot drill bit 3, A sharp 5/16" drill bit 4. Tape measure 5. Hacksaworcut-off saw, finetooth;24teeth/inch 6. Fine half round file 7. Screwdriver- Phillips blade t3. 1/2" Wrench or socket 9, Two-part sealant (Supplied) 10. Torque Wrench WARNING Using electrically operated equipment near gasoline or gasoline vapors may result in fire or explosion, causing personal injury and property damage. Check to assure the working area is free from such hazards, and always use proper precautions. IMPORTANT: The figures in this installation and maintenance instruction may contain vapor recovery equipment (including model numbers) that is not cer1k fied by the California Air Resources Board (CARB)fora specific Phase I Vapor Recovery System, Pleasereferto Exhibit 1 of the appropriate CARB Phase I Executive Or- der for a list of certified Phase I Vapor Recovery System Equipment. Executive Order VR -102-0 HOW TO LOCATE THE POSITION OF THE 61 SO AT 95% TANK CAPACITY (Shut-off points can be adjusted to any capacity to comply with AHJ Requirements) The length of the upper tube and the placement of the 61 SO valve body determine the shut-off point. Follow- ing the standard instructions for the OPW 61 SO will pro- vide for initial shutoff at 95%. In all cases, the upper lube length must be a minimum of 6-1/2" plus the length of the riser pipe. All length measurements are in inches. INSTRUCTIONS 1 i Find tank capacity (in gallons) from tank calibration chart provided by tank manufacturer. 2) Calculate 95% of capacity 3) Locate the 05K volume number on the tank calibra- tion chart. 4) Find the dipstick number (X) which corresponds to the 95% tank volume. And, find the dipstick num- ber (Y) which corresponds to the 100% volume. 5) Subtract the dipstick number (X) from the tank di- ameter (Y) to find the upper tube reference number (Z). (Y) - (X) _ (Z) 6} Subtract 2" from (Z) to find the upper tube depth (C). (Z) -2"=C 7) Is C less than 6-1/2"? NO Upper tube length is C plus the distance from the top of the Face Seal Adaptor installed on the riser pipe to the inside, top lip of the storage tank (A). Upper Tube Length = C + (A) YES Upper tube length is 6-1/2" plus the riser pipe measurement (A). Upper Tube Length = 6-112" + (A) NOTE: You must find the actual tank capacity num- berthat correlates to the 6-112" + (A) depth for the station records. This number may also be used for the purposes of calibrating an electronic tank level system.