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Praxair Services, Inc. <br /> Technical Solutions for the Industrial World. <br /> UC/SCO in, <br /> TrecerReseorch Corrocon <br /> CERTIFICATION OF ELDS" TRACER TIGHT® TEST RESULTS <br /> Date: 12/11/03 Job # 37067NC <br /> Prepaired For: Site Info: <br /> Walton Engineering, Inc 713 N. EI Dorado Street <br /> Richard S. Walton Stockton CA 95202-1601 <br /> 3900 Commerce Drive <br /> West Sacramento, CA 95691 <br /> 916.373.1167 Fax 916.373.1172 <br /> Test Time Period 12/9-111 2003 <br /> SYSTEM TRACER STATUS <br /> Diesel Tank R Pass <br /> 87 Tank R Pass <br /> 91 Tank G Pass <br /> Piping 87 Primary/Secondary G Pass <br /> Piping 91 Primary/Secondary G Pass <br /> Piping Vapor Recovery/Vent- Primary G Pass <br /> Piping Vapor Recovery/Vent- Secondary G Pass <br /> Piping Diesel - Primary/Secondary G Pass <br /> Piping Diesel -Vent- Primary/Secondary I G I Pass <br /> Dispenser Sumps I G I Pass <br /> Praxair Services Inc. certifies that the tank and product distribution lines listed in the above table <br /> have been tested by means of Enhanced Tracer Tight®. According to EPA standard test <br /> procedures for evaluating leak detection methods, the Enhanced Tracer Tight®method is capable <br /> of detecting leaks of>0.005gallons per hour with a Probability of Detection (PD) of 0.95 and <br /> Probability of false alarm of<0.05 <br /> Tester: Alan Harris CA Lic. # 00-1619 <br /> Signature: I �i� Date: 12/11/03 <br /> 1 declare under penalty of perjury that I am a licensed tank tester in the State of California and that <br /> the information contained in this report is true and correct to the best of my knowledge. <br /> The following criteria are used for the classification of leakage based on the presence or absence <br /> of tracer. <br /> PASS FAIL <br /> Criteria: Criteria: <br /> No Tracer Detected Tracer Detected <br />