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• <br /> Exhibit 4 <br /> Determination of Static Pressure Performance of the <br /> Healy Clean Air Separator <br /> (Executive Orders VR-201-D and VR-202-D) <br /> 1 APPLICABILITY <br /> Definitions common to all certification and test procedures are in: <br /> D-200 Definitions for Vapor Recovery Procedures <br /> For the purpose of this procedure, the term "ARB" refers to the California Air <br /> Resources Board, and the term "ARB Executive Officer' refers to the Executive <br /> Officer of the ARB or his or her authorized representative or designate. <br /> 1.1 This test procedure is used to quantify the vapor tightness of the Healy Clean Air <br /> Separator (CAS) pressure management system installed as part of a gasoline <br /> dispensing facility (GDF) under either Executive Order VR-201-D or VR-202-D. <br /> 2 PRINCIPLE AND SUMMARY OF TEST PROCEDURE <br /> 2.1 The Clean Air Separator, while isolated from the vapor recovery system, is <br /> evaluated for vapor integrity using a vacuum decay procedure. The vacuum <br /> decay after 5 minutes is compared with an allowable value. The allowable value <br /> is based upon the initial vacuum level when conducting the test using the table <br /> provided in this test procedure. <br /> 2.2 A positive pressure decay procedure is included that conducts the same <br /> evaluation as the vacuum decay but with positive pressure. This test is <br /> conducted if there is insufficient vacuum (not greater than—2.00" wc) to conduct <br /> the vacuum decay. Districts have the authority to specify in the permit conditions <br /> that this positive pressure test is to be conducted even if the vacuum test has <br /> been conducted. <br /> 3 RANGE <br /> 3.1 The full-scale range of the electronic measuring device shall not exceed <br /> 0-20.00" we with a minimum accuracy of not less than 0.25 percent of full-scale. <br /> 4 INTERFERENCES <br /> 4.1 Leaks in the piping for the Clean Air Separator could bias the test results toward <br /> non-compliance. <br /> Healy Clean Air Separator Test Procedure, Exhibit 4—Executive Orders VR-201-D and VR-202-D <br />