Laserfiche WebLink
<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 7 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 />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 />2. Testing: <br />a. All secondary containments are sampled and analyzed for the background concentration. <br />i. If applicable 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 is pumped throughout the systems primary; product, vent, vapor <br />return piping and dry interstice tank/s. <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, pipelines, and dry tank interstice 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 />3. Tank Testing: <br />a. During the day of testing the primary tank is to be maintained closed from the atmosphere <br />b. Dry interstice tanks <br />i. The tank primaries are inoculated first <br />ii. Tank interstices are required to be liquid free <br />iii. Sampling of the tank interstice is performed for the chemical marker. <br />c. Wet interstice tanks <br />i. Review the MCleak® workplan and check list for guidance in preparing for the test. <br />ii. MCleak® is currently the most thorough ELD tank test method on the market today. <br />iii. Unlike internal camera ELD tank inspections test methods that only test the primary <br />wall of the tank, MCleak test method tests both the primary and secondary wall of <br />the tank and gives the contractor confidence that the entire tank both primary and <br />secondary are tight. <br />