The objectives of this project were to: 1.inspect the subsidy applications submitted by gas stations installed vacuum assist Phase II vapor recovery system. 2.ensure the operators of subsidized gas stations following the properly operation guidance to operate vapor recovery system. 3.promote the abilities of subsidized gas station operators to maintain and repair vapor recovery system. There are two procedures to qualify each subsidy application. The first step is the document inspection to qualify the applications. Then, the second step is three test procedures conducted to quantify the performance of Phase II vapor recovery systems installed at gasoline dispensing facilities, i.e. Air to Liquid Ratio（A/L）test, Leak Decay test and Dynamic Back Pressure test. According to the Gasoline Dispensing Facilities installed Vacuum Assist Phase II Vapor Recovery System Subsidy Regulation promulgated by EPA on July 24, 2002, 500 applications were submitted by gas stations. 441 applications were qualified for subsidy, 3 applications were disqualified for subsidy in non-compliance with document inspection, and 56 applications were disqualified for subsidy in non-compliance with the three tests. Among the 56 applications, 41.1﹪were in non-compliance with the Dynamic Back Pressure test criteria, 10.7﹪were in non-compliance with the Leak Decay test criteria, 1.8﹪were in non-compliance with the Air to Liquid Ratio test criteria, and 46.4﹪were in non-compliance with both the Dynamic Back Pressure test criteria and the Leak Decay test criteria. We providing DIY maintenance manual, cartoon VCD and on-site training courses to ensure the operators of gas stations following the properly operation guidance to operate vapor recovery system, and to promote the abilities of gas station operators to maintain and repair vapor recovery system during the three tests. Total operators attended on-site training courses were of 1,886 from 497 gas stations with an average grade of 92 points as per the evaluation tests.

Phase Ⅱ vpor recovery system,Air to Liquid Ratio(A/L) test,Leak Decay test and Dynamic Back Pressure test,VOCs emissions