Laserfiche WebLink
LEAK DETECTION <br /> T B C FI N 0 L () Cx 1 F, S �.cc <br /> 1400 East Paseo Pavon • Tucson,AZ 85718 • Phone 520.207.4878 • FAX: 520.990.8965 <br /> www.LeakDetect.net <br /> can be taken from the sampling ports and analyzed using sensitive, sophisticated analytical equipment. <br /> If the chemical marker is detected outside of the containment, a leak may exist. <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 owner or contractor should mark all piping runs. Sampling probes will be installed in the <br /> pipeline trenches. When pipelines are not located some additional probing may be required. <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 <br /> 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. Sampling ports are installed along the piping trenches and around the tanks. Depending on the <br /> test method the distances between sampling ports can vary but are never greater than 30 feet. <br /> Procedure: <br /> I. A Chemical Marker is added to the product and/or to the airspace within the tank. <br /> 2. Prior to starting the test a Site Evaluation Screening of the accessible system components is <br /> completed. LDT will scan exposed components and identifying any leaks for the contractor <br /> who will make repairs. After the completion of the repairs found during the Site Evaluation <br /> Screening the contractor may leave the site. <br /> 3. Once all the accessible components with leaks are repaired, LDT can begin testing the <br /> underground portion of the system. <br /> 4. A different chemical marker is introduced into the tank. This chemical marker is then pumped <br /> throughout the systems product,vent, and vapor return piping as applicable. <br /> 5. Double Wall Containment Testing: <br /> a. Primary Wall test to Secondary Containment: <br /> L If a leak is present in the primary wall the chemical marker will exit into the <br /> secondary containment. The secondary containment will be sampled for the <br /> chemical marker. <br /> ii. If the chemical marker is found a leak is declared and the leak location will be <br /> identified. <br /> b. Secondary Wall Test to Soil: <br /> i. Even though this is an optional test most owners request the secondary wall to <br /> also be tested. This is an inexpensive test given that all of the test components <br /> are already in place. <br /> ii. The test is simple and includes replacing the atmosphere within the secondary <br /> with a third chemical marker. <br /> Author David Rabb <br /> 2of 3 <br />