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Used Oil Tank Containment Integrity Report For HMT Inspection Tracy Express Carwash & Lube Tracy, CA January 17,2019 Pae 10 of 34 EVALUATION FOR CCR COMPLIANCE — USED OIL STORAGE TANK (CONT'D.) SUMMARY OF CA DTSC EVALUATION PER TITLE 22 CCR, Part 66265.191 (CONT'D.): 6. Close Visual (VT) external inspection of the Used Oil Tank found no evidence of defects in the walls or structural components of the tank, or other concerns such as metal loss from service conditions. The structural integrity is adequate until the next inspection. The outer secondary tank is not directly exposed to corrosion from the elements. The Bulk Storage Tank is coated. In addition to complying with empirical design rules for continued service of steel tanks, we have evaluated this storage tank structure and surrounding area in accordance with the specified requirements of California Dept. of Toxic Substances Control Regulations §66265.190 through §66265.200 (as applicable) and find the following to be true: Pursuant to 22 CCR §66265.191, this structure now contains and will continue to contain for the foreseeable future product that can be classified as non-RCRA hazardous waste; Pursuant to 22 CCR §66265.191, this structure is of sufficient capacity as to not be exempt from this regulation; Pursuant to 22 CCR §66265.191, the tank has been adequately designed to industry standards for aboveground welded steel storage tanks and has sufficient structural strength and product compatibility to store this non-RCRA hazardous waste on a long-term basis without collapse, rupture or failure; Pursuant to 22 CCR §66265.191(k), the Used Oil Storage Tank does have secondary containment details that meet the requirements of 22 CCR §66265.193, therefore; 23264311 Used Oil Tank-DTSC Report r4(Rev 0) 2/7/2019 2:38 PM