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<br />Exclusive Providers for MDleak® and PHDleak™ Technologies <br />2765 East Wieding Rd  Tucson, AZ 85718  Phone 520.207.4878  FAX: 520.990.8965  www.LeakDetect.net <br /> <br />Author David Rabb 3 of 8 <br />Version 211202 <br />Procedure: <br />1. 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 />then make repairs. After the completion of the repairs the contractor may leave the site. <br />b. Once all the accessible components with leaks are repaired, LDT can begin testing the <br />underground portion of the system. <br />c. A communication test will be performed verifying that all terminating section of secondary <br />containment piping have an unrestricted air path between the terminating point and the rest <br />of the piping. <br />i. If any section of pipe is proven not communicating to the entirety of the piping, then <br />the contractor must take action to identify resolve/repair the blockage. <br />2. Testing: <br />a. A Chemical Marker is introduced into the primary tank and piping. <br />b. This Chemical Marker is then pumped throughout the systems primary product, vent, and <br />vapor return piping as applicable. <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 gas the secondary <br />containment surrounding the primary containment can be sampled. This sampling even <br />includes tank sumps for primary tank leaks. <br />e. If the Chemical Marker is found in the secondary containment sample a leak is declared and <br />the leak location will be identified. <br />i. The contractor is responsible for repairing the primary leak in a timely manner. <br />ii. Once the primary leak has been repaired LDT will continue with testing. <br />3. Spill Bucket Testing: <br />a. Spill Buckets are hydrostatically tested. A leak rate is calculated and could indicate a leak <br />within the spill bucket. <br />b. If a leak is detected the contractor will be directed to the leak and a repair of the spill bucket <br />will be completed. <br />4. Final cleanup: <br />a. All inoculated primary containments shall be purged of chemical marker before leaving the <br />site <br /> <br />Reporting: <br />1. Reports consist of a two-page written document summarizing the data collected at each site. <br />2. Each component in the system is listed and certified individually. <br />3. Owners, contractors, inspectors, and regulators are invited to contact LDT for specifications <br />regarding MDleak® and MCleak® test methods. <br />