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NW Tank Lint & Ins ection Inc. AST and UST I�ections Linin s and Repair Fr _ n g LI P.O. Box 61847 Vancouver, WA 98666 Office 360-253-3619 Fax 360-253-2898 Jim Thorpe Oil, Inc January 21,2011 PO Box 357 Lodi CA 95241 209-329-5481 209-368-1851 fax To Mr. Marty Thorpe Jim Thorpe Oil, Inc contracted NW Tank Lining & Inspection, Inc. (contract dated December 2, 2010). TLI was contracted to install interior lining systems on two (2) USTs. The USTs are petroleum storage tanks located at 351 N Beckman Road, Lodi CA 95240. The contract was to complete the following: de- gas, open and enter confined space; clean out interior of UST's, conduct an inspection of the steel shell, then install interior lining system using the NPLA standard-631 and API-1631 guidance protocols. The tanks' structural steel shells appeared to be in good condition and seemed to be within the required thickness at the time of the inspection. A complete description of events is detailed below. On January 10, 2011, TLI field crew arrived on-site to perform UST lining installation work. Excavation was not necessary as manways were available. The total depth to the top of the tanks from grade was 3-4 feet deep. The USTs were cleaned out using triple rinse method, conducted by third- party. After reaching the top of the tank, the UST was purged with forced air through a venturi to maximize air volume. The atmosphere inside the tank was checked for the Lower Explosion Level (LEL). When the LEL was at a safe level, the tanks were opened using pneumatic tools. After the tanks were opened, a certified confined space rescue worker entered the tank with supplied air hood and fully protected clothing. Tank #16, Diesel: After the UST was opened, cleaned out and safely entered, the interior striker plates were observed under the fill and monitoring ports as required by EPA. Inspection of the interior shell found small area of corrosion with two perforations of the steel shell, each less than a 1/8`h of an inch in diameter(see photos). Area was repaired with steel plate and epoxy(see photos). UT readings were taken on a one-foot grid. Approval to line was given by San Joaquin County and Iry Reifenberg, P.E. with Foothill Engineering. Lining thickness readings were taken and were between 95-125 mils throughout the shell and over 200+ mils in areas on the bottom with an overall thickness of+125 mils as required by EPA. A Barcol Hardness test was conducted to determine the hardness of the epoxy lining material and was well above 80. Our sponge tester was used to locate any pinholes or holidays in the lining material and none were detected. 2