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t <br /> TANK ANNULAR TESTING <br /> Test Method By: • Manufacturer O Industry Standard O Professional Engr. O Other(see below) <br /> Test Method Uses: O Pressure • Vacuum o Hydrostatic o Other(see below) <br /> Measuring Equipment Used: Vacuum Gauge (range 0 to 30 inches Hg) <br /> Description Tank#1 Tank#2 Tank#3 Tank#4 <br /> Product stored Gasoline-91 Gasoline-89 Gasoline-87 Diesel <br /> Tank manufacturer Unknown Unknown Unknown Unknown <br /> Tank material FRP Steel Steel Steel <br /> Tank capacity (US gallons) 6,000 10,000 12,000 10,000 <br /> Is this a multi-compartment tank? No No No No <br /> Dry or Brine filled annular? Dry Dry Dry Dry <br /> Monitoring system show normal annular? Yes <br /> Is water table above tank bottom? Unknown <br /> Was sensor removed for testing? No <br /> Was sensor properly replaced after testing? Yes <br /> Wait time for vacuum to stabilize (hr:min) 0:05 <br /> Test start time 11:11 AM <br /> Initial vacuum (inches Hg) 10.0 <br /> Test end time 12:11 PM <br /> Final vacuum (inches Hg) 10.0 <br /> Test duration (hr:min) 1:00 <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 retest of the 91 annular only. <br /> 0 2011 Walton Engineering,Inc. <br />