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California Environmental Protection Agency Air Resources Board Vapor Recovery Test Procedure Exhibit 4 Determination of Static Pressure Performance of the Healy Clean Air Separator 1 APPLICABILITY Definitions common to all certification and test procedures are in: D-200 Definitions for Vapor Recovery Procedures For the purpose of this procedure, the term "ARB" refers to the California Air Resources Board, and the term "ARB Executive Officer" refers to the Executive Officer of the ARB or his or her authorized representative or designate. 1.1 This test procedure is used to quantify the vapor tightness of the Healy Clean Air Separator tank pressure management system installed as part of the Healy Phase II EVR System Not Including ISD at a gasoline dispensing facility (GDF). 2 PRINCIPLE AND SUMMARY OF TEST PROCEDURE 2.1 The Clean Air Separator, while isolated from the vapor recovery system, is evaluated for vapor integrity using a vacuum decay procedure. The vacuum decay after 5 minutes is compared with an allowable value. The allowable value is based upon the initial vacuum level when conducting the test using the table provided in this test procedure. 2.2 A positive pressure decay procedure is included that conducts the same evaluation as the vacuum decay but with positive pressure. This test is conducted if there is insufficient vacuum (not greater than — 2.00" wc) to conduct the vacuum decay. Districts have the authority to specify in the permit conditions that this positive pressure procedure is to be conducted even if the vacuum test has been conducted. 3 RANGE 3.1 The full-scale range of the electronic measuring device shall not exceed 0-20.00" we with a minimum accuracy of not less than 0.25 percent of full-scale. 3.2 If necessary, the minimum and maximum nitrogen feed -rates, into the system, Healy Phase 11 EVR System Including Veeder-Root ISD, Exhibit 4 — VR -202-A