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Frorn:LEDCOR CONSTRUCTI 206 2308833 02004 12:26 #100 F.002/002 <br /> 03/23:2004 11:33 Fax 10002 <br /> Praxair Services, Inc. <br /> Technical Solutions for the industnal World <br /> UCISCO Jul Tracer Fiaoearch Currocon <br /> CERTIFICATION O EL 9A" TRACER TIGHT®TEST RESULTS <br /> Date: 03/02/04 Job# 37197NC <br /> Prepared For: site Info: <br /> Ledcor Construction Costco <br /> 9655 SE 36th St.Suite 210 1616 E. Hammer Lane <br /> Mercer Island,WA 96040 Stockton,CA 95210 <br /> Test TimePeriod 03101-02104 STATUS <br /> SYSTEM TRACER <br /> E87nk <br /> k PA55 <br /> orth (Tank 1) <br /> outh (Tank 2) R PASS <br /> (Tank 3) R PASS <br /> 87 P unary W PASS91 Primary W PASS <br /> Piping 89 Primary <br /> Piping Vapor Recovery Primary W PASS <br /> Piping Vent Primary W PASS <br /> Piping Diesel-Primary <br /> Pipin asci-Vent-Primary <br /> Dispenser Sumps V4 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 procedures <br /> for evaluating leak detection methods,the Enhanced Tracer TightB method is capable of detecting <br /> leaks of?o.o05gallons per hour with a Probability of Detection (PD)of 0.95 and Probability of false <br /> alarm of<0.05 <br /> Tester: Clarence Sullivan CA Lic.# 1604 <br /> Date: 3121 <br /> Signature: 04 <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 of <br /> tracer. FAIL <br /> PASS <br /> Criteria: Criteria: <br /> No Tracer Qetected Tracer Detected <br />