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University of the Pacific Spill Prevention, Control, and Countermeasure (SPCC) Plan <br />Stockton, California .Aboveground Fuel Storage Tanks <br />4.2.1 Construction (40 CFR 112.8 (c)(1)) <br />The 2,000-gallon #3 AST Convault at the Physical Plant is constructed of steel inside a concrete <br />exterior structure in accordance with industry specifications as described the manufacturer's <br />technical specification found in Appendix K. <br />Steel tank construction <br />Convault® steel tanks are made of 1/8" or 3/16" thick steel, depending on warranty and tank size. <br />The steel tank contains and holds the liquid fuel, which is the primary function of the tank. To <br />make the steel tank systems fit for their function; the tanks are made in accordance with the UL <br />standard 142 and ULC standard S601. The UL/ULC standards cover all the aspects of tank <br />construction including material specification, fabrication, welding and testing. The tanks are listed <br />in accordance with UL/ULC Standards and carry UL/ULC labels as such. <br />At the fabrication shop, the tanks undergo a number of quality control and test procedures <br />including a 24 to 48 hour pressure test at five (5) psig. <br />4.2.2 Secondary Containment (40 CFR 112.8(c)(2)) <br />Secondary Containment <br />The second stage of manufacturing consists of wrapping the steel tank with a minimum of 1/4" <br />thick Styrofoam (foam) insulation and an impervious barrier of 30 mil high density polyethylene <br />membrane. The 30 mil poly membrane provides containment for the remote probability of fuel <br />leak through the steel tank. A leak detector pipe terminating in the secondary containment <br />provides a positive-indication that the tank is not leaking. <br />Another advantage of the 30 mil poly is that it shields and protects the steel tank exterior from <br />coming in direct contact with concrete and thus minimizing the potential of tank external <br />corrosion <br />4.2.3 Drainage of Diked Areas (40 CFR 112.8(c)(3)) <br />This section is not applicable since there are no diked areas at this facility. <br />-26 <br />Version 1.0, 11/28/2016