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Non-Destructive Metal Thickness Testing T&T Trucking, Inc. Lodi, CA 95240 Non-Destructive metal thickness testing was performed on December 7, 2018, as prescribed by the guidelines of the Steel Tank Institute and the requirements of the SPCC Plan Section 112.8(c)(6). § 112.8 Spill Prevention, Control and Countermeasure Plan requirements for onshore facilities (excluding production facilities). (c) Bulk storage containers. (6) Test each aboveground container for integrity on a regular schedule, and whenever you make material repairs. The frequency of and type of testing must take into account container size and design (such as floating roof, skid mounted, elevated, or partially buried). You must combine visual inspections with another testing technique such as hydrostatic testing, radiographic testing, ultrasound testing, acoustic emissions testing, or another system of nondestructive shell testing. You must keep comparison records and you must also inspect the container's supports and foundations. In addition, you must frequently inspect the outside of the container for signs of deterioration, discharges, or accumulation of oil inside diked areas. Records of inspections and tests kept under usual and customary business practices will suffice for purposes of this paragraph. Metal thickness testing was performed utilizing a Certified Danatronics EHC-09DL-CW Digital Ultrasound thickness gauge. Calibration of the certified testing device was performed and passed on December 7, 2018, prior to conducting the non-destructive test evaluations. Non-destructive test consisted of up to 15 A point measurements in every square foot throughout the lower half of the tanks. Testing started at the bottom and continued around the tank sides to the six-foot mark. All readings are reported as the average thickness measurements per square foot. No defects were observed throughout all of the fuel and oil product tanks and is the system is in compliance with CFR 112.8(c)(6) testing requirements. Test frequency is based on Industry Standards as the tank systems are Category III. Gary Reeves Certifie Steel Tank Institute Level I & Level II Tank System Inspector " SP001 #11111 X51309' lir NDT-UT#0001 / ASNT-TC-1A#073128 01 cz.