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Mar- 28 08 10:03a Sandra Barnhart 2098458586 p.11 Installer: This instruction booklet MUST be left with the owner of the service station at which the equipment is being installed. Station Owner: Retain these instructions for future use and provide trem to oer-scns servicing or removing is equipment. STP-MLD Introduction STP-MLD units are piston-operated mechanical leak detectors intended for installation only in a petroleum pumping system operating with 20 to 50 PSI pump pressure with less than 12 feet of static fluid head. They automatically indicate pipeline faults, which leak 3 GPH (gallons per hour)or more at 10 PSI. These leaks are indicated by restricting system delivery to 3 GPM (gallons per minute) or less at pump pressure of up to 30 PSI in compliance with U,S. EPA requirements 280.41(b) &280.44(a)for automatic leak detection in pressurized piping. After installation, the user of the leak detector must monitor system delivery levels to ensure that any restricted delivery of fuel, signaling a leak in the pipeline, is dealt with promptly. The STP-MLD units test the delivery pipeline system up to the solenoid valve in the dispenser for leaks whenever the static system pressure has fallen to one PSI or less, and within 3 to 4 seconds(depending on model)allows full flow if the system has no leaks. A leak smaller than the required 3 GPH detection level, any air or vapor trapped in the system, or systems with pressure below 26 PSI,will lengthen the time before the leak detector allows full flow. The leak detector is not designed to detect leaks from the underground storage tank or the submersible pump. STP-MLD units are designed for use with FE Petro STP,IST model submersible pumps. STP-MLD units can also be used in competitive submersible models equipped with a 2" NPT leak detector port or special leak detector tee housing. The STP-MLD units can be used with gasoline, #2 diesel, kerosene, any combination of gasoline and ethanol or methanol, up to 20% MTBE and gasoline, up to 20% ETBE and gasoline, or up to 17%TAME andgasoline. STP- IVILD-D units are for use with diesel fuel and kerosene only. See Technical Bulletin 002(TB002)for specifics on STP-MLD, STP-MLD-D,and STP-MLD-E models. The STP-MLD units mount in a 2" NPT threaded leak detector port provided in most submersible petroleum pump manifolds or a special adapter tee housing and may be installed in any position. The piston chamber of the leak detector must be vented to the tank. If your submersible pump does not have a "tank" port, the pump will have to be replaced, a threaded riser must be used, or a different leak detector must be used. All mechanical leak detectors must be tested upon startup, and routinely thereafter(at least annually) under NFPA standards. These NFPA and other industry testing practices must be followed by the installer and the end user, A leak detector is not a substitute for compliance with prudent industry practices. Fuel inventory reconciliation checks must be performed on a daily basis by comparing dispenser meter totalizers with fuel volume changes in the underground tank. Installation Instructions Installation of two or more STP-MLD's in parallel into the same product piping system will Caution !\ result in the smallest leak that is detectable being greater than the EPA requirements. Each STP-MLD will detect a leak of 3gph or greater. If two STP-MLDs are In parallel, a leak of 6 gph will be the smallest leak that will be capable of being detected. If three STP-MLDs are in parallel,a leak of 9 gph will be the smallest leak that is capable of being detected,and so on. Caution t Third party tests have approved the use of: STP-MLD in pipelines up to 129 gallon capacity with a bulk modulus between 15,000—35,000 psi/ml. STP-MLD-D in pipelines up to 370 gallon capacity with a bulk modulus between 16,000—36,ODD psilml. STP-MLD-E in pipelines up to 49 gallon capacity with a bulk modulus of 1,280 PSI/mi. Note: A precision line test must be conducted before installing a leak detector for the first time. A precision line test is also recommended before replacing a leak detector that is having slow flow(tripping) problems to assure line integrity. Note: I Before installing the leak detector, purge the system of any air by running the pump and delivering gasoline from each dispenser(starting with the dispenser farthest from the pump), until all air is removed. The leak detector will not work properly until all of the air is out of the system. 3