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Lubrizol <br />9 February 2021 <br />CONFIDENTIAL <br />JUN 0 2 2023 <br />ENVI1tUNNlh.,.V1-AL 11LALT11 <br />DCPA I'NILNT <br />The Lubrizol Corporation (Lubrizol) is a manufacturer of additives commonly used in fuels and lubricants. <br />UltraZol® 9888 and UltraZol® GA9058 are two of Lubrizol's available gasoline fuel additives. UltraZol@ 9888 has <br />been stored in fiberglass tanks for the last 10 years from material made from DERAKANETm 470-300 epoxy vinyl <br />ester resin at ambient temperatures. This letter is intended to provide chemical information to determine <br />underground storage tank resin compatibility with Costco's UltraZol@ 9888 tanks. Below is a comparison of the <br />compositional information show in Section 3 of the respective product's US Safety Data Sheets (SDS). <br />Substance <br />UltraZol@ 9888 (Current) <br />UltraZol@ GA9058 (Proposed New Product) <br />Xylene <br />40-50% <br />40-50% <br />Polyether amine <br />1-5% <br />10-20% <br />Petroleum naphtha <br />1-5% <br />1-5% <br />H drox alk l carboxylic acid <br />1-5% <br />1-5% <br />2-Ethylhexanol <br />Not present <br />1-5% <br />Toluene <br />0.1-0.5% <br />0.1-0.5% <br />++ Ethyl benzene <br />5-10% <br />5-10% <br />++ Naphthalene <br />0.1-0.5% <br />0.1-0.5% <br />++ The listed components are subcomponents of the hazardous ingredients listed above. <br />The above product composition is considered CONFIDENTIAL BUSINESS INFORMATION by Lubrizol and is <br />provided be used for Environmental, Health and Safety purposes only. <br />Please do not hesitate to contact me if I can be of further assistance. <br />Kind Regards, <br />Megan Copeland <br />Product Steward <br />Megan.Copeland@lubrizol.com <br />This information is provided for informational purposes only and does not constitute legal advice. While every effort has been made to <br />ensure the accuracy of the information contained herein, The Lubrizol Corporation does not guarantee the accuracy or completeness and <br />cannot be held liable for any errors in or reliance upon this information. <br />