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PO Box 1928 STI SP-001 <br /> POWERS BENICIA,CA <br /> TEL 707707 333343400 STOCKTON EAST WATER DISTRICT STOCKTON,CA <br /> FAx 707 922 2284 <br /> ENGINEERING$INSPECTION,INC. www.Powersei.conn Gasoline Tank <br /> 4. Access • VT and a. The roof of the tank is accessed via portable ladder. <br /> structure measurement of <br /> access structure <br /> components <br /> 5. Coatings • VT of Coatings a. The tank was visually inspected for any coating failure. The <br /> tank shell, ends, and appurtenance coatings are in fair condition. <br /> The shell coatings are thinning and have areas of isolated <br /> coating failure. Consider recoating the tank and applying touch- <br /> up coatings to all areas of isolated coating failure. <br /> b. The tank saddles are experiencing minor coating failure and <br /> corrosion on the saddle to concrete support interface. Monitor <br /> the condition during periodic inspection. <br /> 6. Venting . VT of existing a. The tank is equipped with a 2-in normal vent with 3.14 square <br /> venting system inch of surface area opening and 4-in VRU with a total of 12.57 <br /> • Calculate square surface area of opening. Combined the venting is greater <br /> Venting than the largest nozzle (4-in) in use with 12.57 square inches of <br /> Requirements surface opening. The normal venting is sufficient according to <br /> NFPA 30 and UL 142. <br /> b.According to the Morrison Venting guide and NFPA 30 the tank <br /> minimally requires an 8-in emergency vent with 276,960 SCFH <br /> venting capacity for both the primary and secondary tanks. The <br /> installed 8-in weighted lid emergency vents provide the required <br /> emergency venting for the primary and secondary tanks. <br /> 7. Grounding • VT grounding a. The tank is adequately grounded with the steel saddles and <br /> system bolts. <br /> 8. Signage and • VT to document a. The tank has a diamond placard hazard sign required by NFPA <br /> Placards Fire Department 704. The signage is slightly worn but appears to be in good <br /> Signage condition. <br /> b.The tank is not equipped with a nameplate containing basic data <br /> and tank identification. Consider installing a nameplate. <br /> 9. Gauging • VT of tank a.The tank has an automatic tank gauging system. The gauge <br /> Gauging system appears to be in good condition and is in working order. No <br /> anomalies were noted by operations. <br /> b.The tank gauging system is sufficient for this tank. <br /> 10. Piping . VT of piping a.Visual inspection of the piping components was performed. The <br /> system threaded components near the issue line are seeping. Consider <br /> resealing all threaded connections. <br /> STI-SP001 Stockton Water District TkNo Gasoline Stockton,CA 2019 Rev Date Printed:2/4/19 <br /> O..docx <br /> ©2018 PE&I Inc. <br /> Page 3 <br />