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Poe"' STI SP-001 INSPECTION <br /> POWERS e°"" "� '° <br /> FF 707 4SIW GILLIESTRUCKIN3 $TOCKTON,CA <br /> FP%]0]B32]2B4 <br /> ENGINEERING&INSPECTION,INC. '"'"'"Y^^'°«°m' Diesel Tank <br /> Tank Suitability for Service Statement <br /> This facility is regulated by all federal, state, and local <br /> regulations. The Code of Federal Regulations, 40 CFR <br /> L112, requiresthat the facility maintain a Spill Prevention, <br /> Control, and Countermeasures (SPCC) plan that <br /> adheres to the industry standard requirements for <br /> regular inspections. The Steel Tank Institute (STI) <br /> SP001 Standard requires that the aboveground storage <br /> tanks (ASTs) be formally inspected based on the <br /> category of the AST. <br /> Next Inspection Schedules <br /> STI SP001 recommends the interval to the next inspection be determined based on known tank category <br /> and volume. This 10,000 gallon tank is currently equipped with a spill control system (secondary <br /> containment) in the form of a steel dike. The tank has an inherent continuous release detection method <br /> (CRDM) in the form three steel saddles that elevated the tank. If the tank is leaking there will be visual <br /> evidence around the base of the tank. Based on the current configuration, this tank is classified as a <br /> Category 1 tank. Per inspection interval definitions outlined in STI SP001, PEI recommends the following <br /> inspection schedule: <br /> • An out-of-service, internal inspection inspection is not required. <br /> • A leak test in accordance with STI SP001 is not required. <br /> • An external, in-service inspection should be scheduled no more than 20 years from the current <br /> inspection date or sooner if a change in tank condition occurs. However, more stringent governing <br /> regulatory intervals of inspection may supersede this interval. <br /> Required Repairs for Continued Service <br /> 1. Install a larger Sin vent and emergency venting for this tank. STI SP001 refers to the Morison Bros. <br /> CO. Venting guide for appropriate emergency venting recommendations for Horizontal Cylindrical <br /> Tanks. Currently the tank is only equipped with a 2-in open vent. It is recommended that a proper vent <br /> is installed, at a minimum of 3-in. An 8-in emergency vent is recommended based on the tanks <br /> calculated wetter area of 584 sq.-ft to meet the emergency venting requirement. The manway cover <br /> may also be modified to allowfor proper emergency venting. Long bolts may be installed that allowfor <br /> lift under internal pressure and can be installed on the existing 20-in manway cover. The bolt should <br /> allot for at least 1-1/2-in lift. A secondary option may be replacing or installing an emergency vent on <br /> the manway cover. <br /> Considerations or Recommended Repairs <br /> 2. Consider applying touch up coatings to the isolated areas of coating failure. <br /> 3. Consider replacing threaded components with welded components to prevent seeps. <br /> 4. Consider installing a nameplate with basic tank information. <br /> 5. Install an NFPA placard on or near the tank that conforms to NFPA 704. <br /> SIISPWI Ceres Thv# x° Ta Sb 1-QkZU Wba QI Ptl..'. <br /> OMP£L lrc <br /> Page 4 <br />