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PO EO STI SP-001 POWERS e°"" "°'_'° Fe 70796]IN MIO VALLEY AGRICULTURE SERVICES MIO VALLEY AO FP%]°]B - ENGINEERING&INSPECTION,INC. mnWy.WM9lLLUm Diesel Fuel Tank Executive Summary Powers Engineering and Inspection, Inc.(PEI)was contracted by Mid Valley Agriculture Servicesto provide an STI SP001 Inspection for Tank Diesel Fuel at the Mid Valley Ag facility,on 811312019.This tank inspection included the tank,tank appurtenances, tank foundation, and tank containment. In addition, PEI inspected all piping, piping connections and supports, and tank related electrical components from the first skin valve to the first flanged connection outside the containment. This report is generated on data gathered from three locations:applicable codes, regulations,and laws;the observed field conditions existent during the STI-SP001 inspection; and material provided in written form by the facility, end-user, or client (e.g., as-builts, previous inspection reports, written transcriptions of conversations with the facility).This inspection report is based solely on empirically observable conditions, observed during the inspection process and correspondence with the facility or end-user. The diesel fuel tank is an 8-R. diameter x 25.83-ft. long, horizontal cylinder, single wall tank with a nominal capacity of 10,000 gallons.The current product stored in the tank is diesel fuel. Inspection Methods Results Goal Employed 1.Hydraulic . VT of tank a.Visual assessment and non-destructive testing performed did not identify and bottom, any key components that may affect the hydraulic integrity of the tank. It Structural appurtenances, is the Inspector's opinion that the tank is suitable for continued service. Integrity shell, piping, b.Thetank is resting on top of a concrete secondary containment dike.The containment area concrete dike is in good Condition with no major cracking or damage for signs of identified. The tank is elevated off the concrete with three steel saddle product leakage. supports attached to the base of the tank. All supports are in good condition with only minor rust present. c.The underside of the tank was inspected visually for signs of staining or leaks with none being identified. d.Ultrasonic thickness(UT)readings were performed along the accessible tank surfaces. The shell is 114-in thick. No significant metal loss due to internal corrosion was identified. 2.Release . VT of Release a.The tank has an inherent Continous Release Detection Method(CRDM) Detection Prevention Barrier as an elevated singlewall AST and qualifies as having overfill protection RPB in the form of a manual measurement device and concrete spill . Review of Containment area. Consider installing a spill Control box around the fill Continuous nozzle to Catch any product in the event ofoverfill aswell as an automatic Release Detection tank level gauge. Method CRDM b.The tank has a release prevention barrier(RPB) as an elevated single wall AST and in the form a Concrete dike that would contain any leaks. The tank may be categorized as an STI SP001 Category 1. c.Minor staining was identified around the inlet piping which appears to have occurred from taking manual height readings. The appurtenances piping and valve manifolds are subject to seepage over time and their Condition should be monitored with periodic inspections. d.The tank may be categorized as an STI SP001 Category 1 because any leak would be Continuously contained/detected by the secondary Containment. As such, the next STI SP001 External Inspection should occur within 20 years(or before 2039).An STI SP001 Internal Inspection is not required.A leak test is not required. Periodic external inspections should be conducted monthly and annually. 3.Containment . Measure a.The secondary Containment was in good condition and no leaks or containment defects were identified. . Determine b.Minor cracks were identified in the concrete Containment which could permeability of hinder the containments ability to contain product. Consider sealing the containment Concrete cracking in the concrete dike in the areas marked in the Containment Layout drawing. SD WWIMDV Y"GRGLL MSEMMSTXMOESELMELMDV YR MW Paget C Pn1 OM18 SM19PEMW