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-4- <br />5.4 Stopwatch <br />Use a stopwatch accurate to within 0.2 seconds. <br />5.5 Flow Meter <br />Use a Dwyer flow meter, Model RMC -104, or equivalent, to determine the <br />required pressure setting of the delivery pressure gauge on the nitrogen supply <br />pressure regulator. This pressure shall be set such that the nitrogen flow rate is <br />between 2.0 and 4.0 CFM. <br />5.6 Leak Detection Solution <br />Any liquid solution designed to detect vapor leaks may be used to verify the <br />pressure integrity of the test equipment prior to conducting the test. <br />5.7 Condensate Collection Vessel <br />A container approved for use with gasoline that can hold at least a half gallon of <br />material. <br />5.8 Graduated Cylinder <br />A graduated cylinder suitable for use with gasoline capable of measuring to the <br />nearest ounce or mL. <br />6 PRE-TEST PROCEDURES <br />6.1 The following safety precautions shall be followed: <br />6.1.1 Only gaseous nitrogen shall be used to pressurize the system. <br />6.1.2 An 8 oz. pressure relieve valve shall be installed on the Test Port Assembly <br />to prevent the possible over -pressurizing of the Clean Air Separator. <br />6.1.3 A ground strap should be employed during the introduction of nitrogen into <br />the system. <br />6.2 There shall be no Phase I bulk product deliveries into or out of the storage <br />tank(s) within the three (3) hours prior to the test or during the performance of <br />this test procedure. <br />6.3 All pressure measuring device(s) shall be bench calibrated using a reference <br />standard. Calibration shall be performed at 20, 50, and 80 percent of full scale. <br />Accuracy shall be within two percent at each of these calibration points. <br />Calibrations shall be conducted on a frequency not to exceed 180 days. <br />Healy Phase 11 EVR System Including Veeder-Root ISD, Exhibit 4 — VR -202-A <br />