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embedments in the concrete block wall have been sealed with a suitable sealant to prevent leakage. The containment is by a voids filled reinforced concrete blockwall that is unlined.All concrete is permeable to any liquid, but concrete has a very low rate ofpermeability. Any spills would be discovered long before diesel or used oil could penetrate the 8" concrete block wall or the concrete floor. All penetrations are caulked with sealant. The block wall containment area will hold the largest tank (10,000 Gals.) with 0.39 feet of freeboard. By observation, it was determined that secondary containment far exceeds the 110%volume of the used oil tank. The secondary containment does not have a drain system, and storm water must be pumped out (See Inspection Data Sheet and Mathcad Sheet attached). Pi ing Condition Tank piping is in very good condition. Vacuum line is 1 VS"schedule 40 about 4'long. Pressure side is I %s"single wire oil resistant rubber hose to top oftank than I %s"fill pipe ofschedule 40 pipe. Volume 389 cubic inches. 1.7 gals. The drain or unloading line was tested with the tankfor a pressure of5 psi. with no leaks. Used Oil Tank Integrity Test On the date of this inspection,there was no visible sign of any current or past leakage from this waste oil tank. On 9/29/2008 a 5 PSI pressure test was applied to the tank and the two foot of product in the used oil tank. Jim Thorpe Oil provide the manpower and equipment to make the tank air tight and pressurize the tank. The tank was pressurized slowly with a visual check of all welds and piping as the pressure was increased to 5.0 PSI (See inspection data sheet attached for details of the test). Two air leaks were found by soap solution and repaired by tightening access bolts and a pipe plug. The tank remained under 5 PSI pressure for 2.5 hours without any pressure loss. No stress cracks or welding failures were observed during the 2.5 hours under pressure.No make-up air was need during the test to maintain a 5.0 PSI on the tank(See Inspection Data Sheet attached). Used Oil Tank Anchorage Design On inspection of the used oil tank. it was observed that the used oil tank was not constructed with anchorage to the containment floor. A proper anchorage system was designed by the author to prevent movement of the tank as directed by the 1997 California Building Code (See attached drawing and calculations). The tank owner installed the seismic anchorage to the used oil tank. Durability of the Tank The manufacture states that the tank life for this tvPe of use. is 50 vears from the date of manufacture with Prover corrosion Protection(Painting). Ifcorrosion appears, the area should be cleaned to bare metal. Primed and Painted with a suitable coating. Site Security The site has a chain-link property fence with rolling gates and is under use on a 24/7 basis by employees of the company. There is a watchmen on dutv 24/7. Warranty On the date of this inspection and with the seismic anchor retro fit this used oil tank meets or exceeds the requirements of both the State and County codes. I. Ervin Rifenburg. PE. certify under penalty of law. that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that aualified