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49 Fiber Glass Systems <br />December 12, 2011 <br />Subject: Ethanol, Methanol & Biodiesel Fuel Compatibility <br />To Whom It May Concern: <br />217 Fox Run Circle <br />Hot Springs, Arkansas 71901 <br />Tel: 501-545-7234 <br />E -Mail: jack. bales@nov.com <br />APR 2 6 2016 <br />NOV Fiber Glass Systems Red ThreadO IIA piping system has been manufactured <br />since 1990 and is compatible with: <br />- all concentrations of ethanol blended fuels, up to and including 100% <br />- all biodiesel fuel blends, up to and including 100% <br />- all methanol blended fuels, up to and including 100% <br />Red Thread IIA was Underwriters Laboratories Inc. (UL) Listed for alcohol compatibility <br />in 1990. Red Thread IIIA is also UL 971 Listed for all fuels and applications, per UL <br />Standard 971- 2004. <br />Red Thread (manufactured and UL Listed from 1968-1984) and Red Thread II <br />(manufactured and UL Listed from 1984-1990) are both compatible with all ethanol fuels <br />up to and including 100%. The compatibility of both these products is limited to a <br />temperature of 75 degrees F. <br />Please contact me if you have any questions. <br />Best regards, <br />9 4 z. "- <br />Jack L. Bales <br />Manager, Petroleum Marketing <br />