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FASTI�= CH <br /> March 3, 2025 <br /> Stacy Rivera <br /> Lead Sr. Registered Environmental Health Specialist <br /> San Joaquin County Environmental Health Department <br /> 1868 E. Hazelton Ave. <br /> Stockton, CA 95205 <br /> Subject: Repairs to Owens Corning DWT-2P 10 ft diameter 25,000 <br /> gallon double wall brine monitored fiberglass UST, 87 product <br /> Location/ID: Sheriff's Operation Center, #1 <br /> 7000 Michael Canlis Blvd., French Camp, CA 95205 <br /> CERS ID 10181419 <br /> Tank Owner: San Joaquin County Sheriff's Office <br /> Site Contractor: Joseph Bagley, Bagley Enterprises, Inc. <br /> Ms. Rivera, <br /> Containment Solutions, Inc. (CSI) and Bagley Enterprises, Inc. has provided <br /> Fueling and Service Technologies, Inc. (FASTECH) information regarding the <br /> history, manufacturing details, engineering information, inspection findings and <br /> repair plan for the double wall fiberglass underground storage tank (UST) primary <br /> containment failure at the subject site. <br /> The subject UST was manufactured by Owens Corning Fiberglass and shipped <br /> to the site 1989 and installed sometime thereafter. The 25,000 gallon model <br /> DWT-21P was manufactured with a smooth outer wall bonded to the crowns of the <br /> ribs. The ribs were attached to the tank's inner wall on 11 inch centers. The <br /> space between the two walls between the ribs is about 1 inch. <br /> The double wall UST is configured with a dry interstitial space and monitored with <br /> a liquid sensor. Fluid was detected by the liquid sensor indicating a breach of the <br /> primary containment. <br /> After the UST was pumped out and cleaned, CSI technician Michael Tovar <br /> entered the UST on October 15, 2024 and performed a visual interior inspection <br /> and identified a surface hump and crack at the at the 7 o'clock position <br /> approximately 30" X 16" on the southwest side of the tank. Additional cracks and <br /> blistering were noted in the CSI inspection report QT-1176223 dated October 17, <br /> 2024. Tank deflection measurements indicated the UST was still within new UST <br /> installation specifications. <br /> 7050 VILLAGE DRIVE,SUITE D • BUENA PARK,CA 90621 <br /> (714) 523-0194 • FAX(714) 523-4235 • WWW.FASTECHUS.COM <br />