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PO BOX 1928 <br />BENICIA, CA 94510 <br />TEL 707 346 5058 <br />FAX 707 922 2284 GEORGE REED INC. STI SP001 EXTERNAL INSPECTION <br />ESCALON, CA <br /> www.powerseicom 7,000 GALLONS OIL TANK <br /> <br />STI-SP001 External George Reed Inc. Escalon, CA Tank 7,000 Gal October 2024 Project #24-378 Rev0 <br />© 2024 PEI Inc. Page 2 of 43 Date Printed: 11/7/24 7:42 AM <br /> <br />Executive Summary <br /> <br />Powers Engineering and Inspection, Inc. (PEI) was contracted by George Reed Inc. to provide an STI <br />SP001 External Inspection for a 7,000 Gallons Oil Tank at the Escalon, CA facility. <br /> <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 correspon dence with the facility or end-user. <br /> <br />The 7,000 Gallons Above Ground Storage Tank (AST) is a shop-fabricated single walled vertical storage <br />steel tank. The tank was built on 1984 by an unknown manufacturer. The tank is currently in Tack Oil <br />service. <br /> <br />Inspection Goal Methods Employed Results <br />1. Hydraulic and <br />Structural <br />Integrity <br />• VE of tank bottom, <br />appurtenances, <br />shell, piping, <br />containment area <br />for signs of product <br />leakage. <br /> <br /> <br />a. The 7,000 Gallons Single Walled Tank is a lap welded <br />vertical aboveground storage tank (AST) sitting on concrete <br />within a concrete wall secondary containment. The tank is <br />currently in tack oil service. The tank, its support structure, <br />and the piping system appear to be in good condition. Visual <br />assessment and Non-Destructive Examination (NDE) <br />performed did not identify any key components, damage or <br />anomolies that may affect the hydraulic or structural integrity <br />of the tank. <br />b. Ultrasonic Thickness Testing (UTT) measurements were <br />performed along accessible areas of the tank shell. <br />Readings were nominal with no significant corrosion or <br />thinning of the tank and components were identified. <br />2. Release <br />Detection <br />• VT of Release <br />Prevention Barrier <br />RPB <br />• Review of <br />Continuous Release <br />Detection Method <br />CRDM <br />a. The Aboveground Storage Tank (AST) has a Continuous <br />Release Detection Method (CRDM) inherent in its design. If <br />the tank is leaking, there will be visual evidence from <br />underneath the tank. A secondary containment concrete wall <br />serves as spill control. Dirt, and debris are present on the <br />concrete containment floor foundation. Consider cleaning <br />dirt, and debris on concrete containment floor foundation. <br />b. The containment should be periodically assessed with <br />each review of the facility SPCC plan, to ensure hydraulic <br />integrity. <br />c. The tank may be categorized as an STI SP001 Category <br />1 if its Spill Control and Continuous Release Detection <br />Method (CRDM) systems remain functional. <br />d. The tank is not anchored to the concrete foundation. If <br />seismic activity is a concern, consider providing a proper <br />anchorage system for the tank to foundation. <br />3. Containment • Measure <br />containment <br />• Determine <br />permeability of <br />containment <br />a. The tank containment was visually assessed for integrity <br />and adequate secondary containment volume. The <br />containment volume is sufficient to hold the tank’s volume <br />plus additional freeboard and meets 40 CFR 112.7. <br />However, the tank concrete wall was observed to have <br />cracks, isolated areas of spalling and areas of chipping. <br />Repair the areas of containment damage and ensure <br />impermeability of the containment.