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Poe"' STI SP-001 INSPECTION <br /> POWERS e°"" "� '° <br /> FF 707 9]6V GILLIESTRUCKIN3 $TOCKTON,CA <br /> FP%]0]B32 Y2Bi <br /> !ENGINEERING&INSPECTION,INC. wwwY­ Diesel Tank <br /> Executive Summary <br /> Powers Engineering and Inspection, Inc. (PEI)was contracted by Gillies Trucking to provide an STI SP001 <br /> Inspection for the AST at the Stockton, CA facility, on 01/08/2019. This tank inspection included the tank, <br /> tank appurtenances, tank foundation, and tank containment. In addition, PEI inspected all piping, piping <br /> connections and supports, and tank related electrical components from the first skin valve to the first flanged <br /> connection outside the containment. <br /> This report is generated on data gathered from three locations: applicable codes, regulations, and laws;the <br /> observed field conditions existent during the STI-SP001 inspection; and material provided in written form <br /> by the facility, end-user, or client (e.g., as-builts, previous inspection reports, written transcriptions of <br /> conversations with the facility). This inspection report is based solely on empirically observable conditions, <br /> observed during the inspection process and correspondence with the facility or end-user. <br /> The Diesel Tank is an 8.00-ft.diameterx 27.00-ft.long,horizontal cylinderwith butt-welded shell.The tank's <br /> nominal capacity is 10,000.00 gallons. The product stored in the tank is Diesel. <br /> Inspection Methods Results <br /> Goal Employed <br /> 1. Hydraulic .VT of tank a. Visual assessment and non-destructive testing performed did <br /> and bottom, not identify any key components that may affect the hydraulic <br /> Structural appurtenance, integrity of the tank. <br /> Integrity shell, piping, b. The tank is supported on four steel saddles resting inside of a <br /> containment area concrete secondary containment on concrete. <br /> for signs of c.The inspection of the tank was performed while the tank was <br /> product leakage. in-service.The tank appears to be in good condition. <br /> d. No significant itemswere noted that would affect the structural <br /> integrity of the tank. <br /> 2. Release . VT of Release a. The tank is elevated on saddle supports and has aContinous <br /> Detection Prevention Release Detection Method (CRDM). If the tank is leaking,there <br /> Barrier RPB will be visual evidence around the base of the tank. <br /> •Review of b. The tank had a release prevention barrier(RPB)in the form of <br /> Continuous a concrete dike secondary containment. At the time of <br /> Release inspection,the RPB was in good condition with the exception of <br /> Detection Method flooding along the secondary containment. No leak paths were <br /> CRDM observed. However, limited access was available to inspect <br /> containment bottom. During periodic inspections verify that the <br /> secondary containment drain nozzle is functioning properly. <br /> c.The tank may be categorized as an STI SP001 Category 1. <br /> 3. Containment .Measure a. The dike area is concrete with minimal permeability. <br /> containment b.No vegetation growth was present inside the secondary <br /> •Determine containment. However, during the inspection there was debris <br /> permeability of found in the containment. See the Appendix B for photos. <br /> containment c. The dike is equipped with a 2-in drain that is installed near the <br /> containments lowest point and is adequate for water drainage. <br /> Due to the containment having debris, the drain was clogged. <br /> During montly and annual inspections, if debris is in the <br /> containment, it should be cleared out to prevent drainage clog. <br /> SIISPWICeresTv Dlar Ta SbM QkZU Wba QI Ptl..'. <br /> OMP£L lrc <br /> Page 2 <br />