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LEAK DETECTIC"M <br /> LLC <br /> Exclusive Providers for MDleak® and PHDleakT" Technologies <br /> 1400 East Pasco Pavon Tucson, AZ 85718 Phone 520 . 207 . 4878 FAX: 520 . 990 . 8965 w�vw.LeakDetect. net <br /> Final ELD Test Procedure : <br /> Preparation : <br /> 1 . Before testing can begin all permits and site information must be acquired by the contractor or <br /> owner . LDT will supply all documents required as requested. <br /> 2 . The contractor must notify LDT if any component in the system was installed that is not full <br /> vacuum compatible . <br /> Setup : <br /> 1 . During the setup portion of the test a contractor is required to be present onsite . <br /> a . The contractor is required to be prepared to repair any accessible component at the facility . <br /> b . Access ports to the secondary containment are required to be installed by the contractor <br /> prior to LDT arriving at the site . <br /> c . Access to the top of the vent risers , tank sumps and UDC ' s may be required. <br /> 2 . Tanks with a vapor interstice are install ready to proceed <br /> 3 . Tanks with a liquid interstice will be inoculated with a water soluble liquid chemical marker during <br /> the pretest phase . <br /> Procedure : <br /> 1 . A Proprietary Chemical Marker/Tracer is added to the liquid within the tank interstice during the <br /> ELD pre -backfill pretest . <br /> 2 . Systems check ; <br /> a . Prior to starting the test an evaluation of the accessible system components is completed . <br /> LDT will scan exposed components and identifying any leaks for the contractor who will <br /> make repairs . After the completion of the repairs the contractor may leave the site . <br /> b . Once all the accessible components with leaks are repair, LDT can begin testing the <br /> underground portion of the system . <br /> 3 . Testing $ <br /> a . All secondary containments are sampled and analyzed for the background concentration . <br /> i . The tank interstice chemical marker concentration is analyzed and noted . <br /> ii . Pipeline secondary should be free of all chemical marker that are to be used during <br /> this phase of testing . <br /> b . A new Chemical Marker/Tracer is pumped throughout the systems primary; product, vent, <br /> vapor return piping and dry interstice tanks . <br /> c . Each component is pressurized to the working pressure of the individual component with <br /> the chemical marker . <br /> d . Once the primary component is pressurized with the Chemical Marker/Tracer gas the <br /> secondary containment surrounding the primary containment can be sampled. This <br /> sampling even includes tank sumps , pipelines , and dry tank interstice for primary tank leaks . <br /> Author David Rabb 6of 7 <br /> Version 191127 <br />