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6 6 <br /> LEAK DETECTION <br /> on <br /> T E C H NS 0 L 0 G I E S LLC <br /> 1400 East Paseo Pavon • Tucson,AZ 85718 • Phone 520.207.4878 • FAX: 520.990.8965 • <br /> www.LeakDetect.net <br /> Concept: <br /> A Proprietary Chemical Marker is added to the product within the containment to be <br /> tested, such as an underground storage tank(UST), or pipeline, or an aboveground <br /> storage tank(AST) where the tank bottom may require testing. Once the chemical <br /> marker is added to the tank, product, and vapor piping primary containment (liquid, <br /> vapor, or both) any leak in the containment would carry the chemical marker out into the <br /> surrounding secondary containment. By utilizing test ports vapor samples can be taken <br /> from the secondary containments and analyzed using sensitive, sophisticated analytical <br /> equipment. If the chemical marker is detected outside of the containment, a leak may <br /> exist. <br /> Preparation: <br /> 1. Before testing can begin all permits and site information must be acquired by the <br /> contractor or owner. LDT will supply all documents required as requested. <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 <br /> component at the facility. <br /> b. Access ports to the secondary containment are required to be installed by <br /> the contractor prior to LDT arriving at the site. <br /> c. Access to the top of the vent risers, tank sumps and UDC's may be <br /> required. <br /> Procedure: <br /> 1. A Proprietary Chemical Marker is added to the product and/or to the airspace <br /> within the primary tank, and piping. <br /> 2. Systems check: <br /> a. Prior to starting the test an evaluation of the accessible system components <br /> is completed. LDT will scan exposed components and identifying any <br /> leaks for the contractor who will make repairs. After the completion of the <br /> repairs the contractor may leave the site. <br /> b. Once all the accessible components with leaks are repaired, LDT can begin <br /> testing the underground portion of the system. <br /> 3. Testing: <br /> a. A different chemical marker is introduced into the tank and piping. <br /> b. This second chemical marker is then pumped throughout the systems <br /> product, vent, and vapor return piping as applicable. <br /> Author David Rabb <br /> 2of 3 <br />