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TANK ANNULAR TESTING <br /> Test Method By: • Manufacturer Industry standard Professional Engr, Other(see below) <br /> Test Method Uses: Pressure • Vacuum Hydrostatic Other(see below) <br /> Measuring Equipment Used: Vacuum Gauge (range 0 to 30 inches Hg) <br /> Description Tank#1 Tank#2 <br /> Product stored Gasoline-87 Gasoline-91 <br /> Tank manufacturer Bakersfield Tank _ <br /> Tank material Steel/Poly <br /> Tank capacity (US gallons) 10,000 <br /> Is this a multi-compartment tank? No <br /> Dry or Brine filled annular? Dry <br /> Monitoring system show normal annular? Yes <br /> Is water table above tank bottom? No <br /> Was sensor removed for testing? Yes <br /> Was sensor properly replaced after testing? Yes <br /> Wait time for vacuum to stabilize (hr:min) 26:00 <br /> Test start time 5/7/2008 2:00 <br /> Initial vacuum (inches Hg) 15.0 <br /> Test end time 5/8/2008 9:00 <br /> Final vacuum (inches Hg) 15.0 <br /> Test duration (hr:min) 19:00 <br /> Change in vacuum (inches Hg) 0.0 <br /> Pass/Fail threshold (inches Hg/hour) 2.0 <br /> TEST RESULT PASS <br /> Comments: <br /> This is a pre-test of the 91 annular only. <br /> © 2006 Walton Engineenng,Inc. <br />