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Fiber Glass Systems I NOY P d��ti n�Solutions <br />April 13, 2021 <br />Tim Hurlocker <br />Costco Wholesale <br />999 Lake Drive <br />Issaquah, WA 98027 <br />Re: Costco fiberglass additive tanks <br />Tim, <br />RECEIVED <br />JulN 0 2 2023 <br />N IRONNII:A 1. IIEALCIl <br />1)1.,1,.,k ZI\IF'NT <br />Fiber Glass Sytems has evaluated the MSDS information on UltraZol GA9058 as provided by <br />Lubrizol and determined that our Fiberglas double wall tanks are compatible with this additive. <br />This is in addition to Ultrazol 9888 and 9888C previously approved. <br />Should you require additional information please contact me at 936-756-7731. <br />Sincerely, <br />Ron Shaffer <br />VP of Sales — Fuel Handling <br />T 936.756.7731 NOV Fiber Glass Systems . <br />nov.com/fgs 500 Conroe Park West Drive <br />Conroe, TX 77304 <br />