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i <br /> el��co�. 7 ( O <br /> Non-destructive Metal Thickness Testing I <br /> Williams Tank Lines - Stockton, CA <br /> Metal thickness testing and evaluation was performed on May 5, 2015, as per Steel <br /> Tank Institutes guidelines and the requirements of the SPCC Plan Section <br /> 112.8(c)(6). <br /> § 112.8 spill Prevention, Control, and Countermeasure Plan requirements for <br /> onshore facilities (excluding production facilities). <br /> (c) Bulk storage containers. <br /> (6) Test each aboveground container for integrity on a regular schedule, and whenever <br /> you make material repairs. The frequency of and type of testing must take into account <br /> container size and design (such as floating roof, skid mounted, elevated, or partially <br /> buried). You must combine visual inspection with another testing technique Such as <br /> hydrostatic testing, radiographic testing, ultrasonic testing, acoustic emissions testing, <br /> or another system of nondestructive shell testing. You must keep comparison records <br /> and you must also inspect the container's supports and foundations. In addition, you <br /> must frequently inspect the outside of the container for signs of deterioration, <br /> nsections <br /> discharges, or ad tests <br /> ccumulation <br /> and culstomary rbusiiness practices will suffice nside diked areas. Recors of iforp � <br /> purposes of this <br /> kept under usu <br /> paragraph. <br /> Metal thickness testing was performed utilizing a certified Danatronics EHC-09DL- <br /> C1NDigital Ultrasonic thickness gauge. Calibration <br /> non destructi a testing <br /> etal thickness testing <br /> on May 5, 2015, prior to conducting certified <br /> Testing consisted of A point measurements per square foot. The Certified UL 142 <br /> aboveground steel#2 Diesel fuel storage tank was evaluated from the lower portion <br /> of the tank to at or above the midline. All report readings are the average thickness <br /> readings per square foot and an average for the entire side was reported. No <br /> defects were observed and the oil product tanks are reported to be in compliance <br /> with CFR 112.8(c)(6) requirements. Williams Tank Lines Certified UL 142 <br /> aboveground steel #2 Diesel fuel storage tank passed their non-destructive metal <br /> thickness test evaluation. <br /> Testing frequency is recommended to be on a five year basis. <br /> Gary Reeves, <br /> S <br /> Certified Steel Tank Institute Level 1 <br /> & Level 2 Tank and System Inspector. <br /> SP001 Level II #11111 <br /> NDT UT Level 111 #001 <br />