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AVOPA, ` 15555 North 79th Place <br /> 851 <br /> Scottsdale, AZ 85260 <br /> Phone: (480) 948.3789 <br /> Fax: (480) 948-3610 <br /> www.flow-dynamics.com <br /> NyiApNVLAP Lab Code 200668 AS9100 Rev B and ISO 9001:2000 <br /> Calibrators, Calibration & Repair <br /> Date August 12, 2011 <br /> Costco Wholesale <br /> 999 Lake Drive <br /> Issaquah, QA 98027 <br /> Attention: Tim Hurlocker <br /> Director of Gasoline Operations <br /> Mr. Hurlocker, <br /> Thank you for choosing Flow Dynamics to test the Franklin Leak Detector Model STP-MLD. <br /> Flow Dynamics is an accredited NVLAP facility and listed in the NIST Government Directory <br /> (http•//ts nist ciov/Standards/scopes/mecha htm). Flow Dynamics is also accredited to ISO/IEC <br /> 17025 ANSI/NCSL Z540 and AS9100 Rev B. The National Institute of Standards and <br /> Technology (NIST) use our Primary Standard Flow Calibrators in their primary standards lab, <br /> as do most government metrology labs around the world. Needless to say, we are well <br /> documented, audited and among the most prestigious primary standard calibration laboratories <br /> in the world. <br /> The Franklin Leak Detector Madel STP-MLD unit tests the piping system. The unit <br /> automatically indicates pipeline faults, which leak 3 GPH (gallons per hour), or more, at 10 <br /> PSI. These leaks are indicated by restricting the system delivery to 3 GPM (gallons per <br /> minute), or less, at pump pressure of up to 30 PSI. <br /> To conduct this test, we used a positive displacement primary standards NIST traceable <br /> calibrator, with a 30 GPM flow capacity, achieving an uncertainty of t0.037% of reading. The <br /> fluid was blended using solvent and Omala to achieve the desired viscosity, simulating UltraZol <br /> 9888 at different temperatures. Our calibrators utilize heaters and chillers in order to vary the <br /> fluid viscosity to the desired range. The static line pressure is varied by the use of regulated <br /> shop air, which exerts pressure through a cylinder in the piping. The goal was to determine <br /> the highest viscosity that could be used by the Franklin Leak Detector, to achieve a 30 second <br /> or less response time, while proving proper operation. <br /> The Franklin Leak Detector achieved an operational condition within the 30 second response <br /> time, with maximum viscosities as follows: <br /> 7 19.3 30 <br /> 25.4 35 <br /> 32.5 40 <br /> Page I of 2 <br />