Leak detection system

Le kDetection. Leak detection methods may be subclassified according to whether or not they are on the tank. On-tank leak detection systems operate immediately upon leakage. 

Leaks in process vessels and devices such as valves are a serious problem in many industries. A variation of vibration monitoring and analysis can be used to detect leakage and isolate its source. Leak-detection systems use an accelerometer attached to the exterior of a process pipe. This allows the vibration profile to be monitored in order to detect the unique frequencies generated by flow or leakage. 

National capacity variance When developing a treatment standard, U.S. EPA examines the available treatment capacity to determine whether it is sufficient to handle current and future waste management needs. If U.S. EPA determines that nationally there is not enough capacity to treat a waste, it can automatically extend the effective date of the waste s treatment standard. Such an extension to the effective date is intended to give the waste treatment industry more time to develop the capacity to handle the waste. Wastes under a national capacity variance can be disposed of, without meeting the treatment standards, in landfills and surface impoundments that meet minimum technical requirements (e.g., liners, leachate collection and removal systems, and leak detection systems). 

The site conditions for an on-site landfill, such as location, geology, hydrogeology, physiography, climate, and so on, should also be suitable. Landfill should meet the minimum technology requirements and regulations for hazardous waste landfills such as double liners and leachate collection and removal systems, leak detection systems, closure procedures and final cover, and construction quality assurance.59... 

On-line pervaporation, 18 518 On-line probes, for fermentation, 11 39 On-line vapor permeation, 18 518 On/off feedback controllers, 20 691 Onstream analyzers, 20 682 On-tank leak detection systems, 24 311 Onyx thermal printing process, 19 321 Oocytes, retroviral infection of, 12 457 Oolitic limestone, 15 28 Opacification, colorants for ceramics, 7 344-345... 

Petroleum refineries must retrofit surface impoundments that are used for hazardous waste management. Retrofitting must involve the use of double liners and leak detection systems. 

GSE CurtainWall is installed in a trench that can also house a collection of leak detection systems. The vendor claims that GSE CurtainWall systems have been installed to depths exceeding 130 ft. A hydrophilic rubber seal is inserted into one or more of the interlocking chambers to prevent migration of contaminants at the panel connections. 

On-Tank Leak Detection Systems. Tanks having leak detection bottoms have a means of directing any leaks to the outside of the tank perimeter where these can be visually observed. Before any significant contamination can occur, the leaks are discovered and the tank taken out of service to address the leak. 

They must meet the new UST requirements for having a leak detection system. 

Passive types of leak detection such as observation wells and collection sumps where product is collected and analyzed directly should work effectively with methanol. Active leak detection systems that rely on thermal conductivity and electrical resistivity sensors will not work with methanol because its properties are so different from gasoline. Another type of active leak detection system that will work with methanol or any other type of fuel relies on changes in impedance in a sensor wire as it becomes wetted with the fuel [4.5]. These leak detection systems also have the advantage that they can pinpoint the location of the leak along the length of the sensor wire. 

All CNG refueling systems should have some type of leak detection system using methane detectors. Methane detectors should be placed strategically about the... 

Leak detection systems are not required for propane refueling systems but could be incorporated in the vicinity of the dispenser, near ground level since propane vapors are heavier than air. Like pipeline natural gas, propane is odorized so that leaks should be noticed by refueling personnel. 

Underground storage tanks and piping should incorporate a leak detection system. While biodiesel is biodegradable, fuel additives or diesel fuel may be added to biodiesel which will make spills a health concern if they find their way into the water system. There is no need for leak detection around the dispenser. 

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