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o% LEAK DETECTION <br /> IF, C I I `d 0 1. 0 C< 1 f: `.i I €C <br /> 1400 East Paseo Pavon • Tucson,AZ 85718 • Phone 520.207.4878 • FAX: 520.990.8965 <br /> www.LeakDetect.net <br /> MDleak ki <br /> California Well Proximity and In Service Leak Detection <br /> Work Plan <br /> Acknowledgements: <br /> California Well Proximity or In-Service Enhanced Leak Detection (ELD) is a regulated testing method <br /> by the State of California. It is also recognized by companies around the United States that desire to <br /> operate the tightest fuel tanks and provide the highest protection to the environment. Companies that <br /> have embraced this state-of-the-art leak detection technology have learned that sensitive leak detection <br /> techniques actually save money over conventional testing methods. MDleaks"'test method is approved <br /> by the California State Water Resources Control Board for Enhanced Leak Detection (ELD) and has <br /> been listed by the National Work Group on Leak Detection Evaluations (NWGLDE). Leak Detection <br /> Technologies, LLC, (LDT) and Leak Detection Operations, Inc are authorized service providers of the <br /> MDleak method. <br /> Flexible: <br /> MDleaks" is a flexible testing method which allows owners to choose the sensitivity or leak rate of the <br /> test. In some cases the facility owners may require a 0.2 gph minimum leak rate where at other <br /> facilities an ultra high sensitivity leak rate is required. The MDleaksmtesting method is unlike other <br /> conventional testing methods in that it can deliver an adjustable sensitivity to fit nearly any test <br /> protocol. <br /> Economical: <br /> The MDleaksm test method does not require the system to be shut down during the test period like most <br /> conventional testing methods. Other than access to the surface directly above the tanks and piping, no <br /> disruption to the production of the facility is required. Furthermore, Leak Detection Technologies <br /> (LDT) can save our clients dollars in lost time and unnecessary excavation. Conventional testing <br /> methods can detect leaks at low sensitivity but cannot identify the source of the leak within the system. <br /> LDT ability to locate leaks with precision reduces downtime and saves our customer dollars. <br /> Concept: <br /> A Chemical Marker "A" (Sulphur Hexafluoride) is added to the product within the containment to be <br /> tested, such as an underground storage tank (UST), or pipeline, or an aboveground storage tank (AST) <br /> where the tank bottom may require testing. Once the chemical marker is added to the product (liquid, <br /> vapor, or both) any leak in the containment would carry, the chemical marker out into the surrounding <br /> space, outside of the primary containment (see ExxonMobil "World Jet Fuel Specification 2008 <br /> Edition". When the surrounding space is soil or backfill, soil vapor sampling ports are installed. <br /> Sampling ports are installed along the piping trench and around the tank perimeter. Soil vapor samples <br /> Author David Rabb <br /> 1 of 3 <br />