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l <br /> North State Environmental <br /> Chemical Waste Disposal • Trucking • Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number: 98-563 <br /> Client : Semco <br /> Project : RMC Lonestar <br /> Date Reported: 05/29/98 <br /> Diesel Range Hydrocarbons by Method 8015 M <br /> Benzene, Toluene, Ethylbenzene and Xylenes by Method 8020 <br /> Reporting MS/MSD <br /> Analyte Method Limit Unit Blank Recovery RPD <br /> Benzene 8020 . 005 mg/Kg ND 106 4 <br /> Ethylbenzene 8020 . 005 mg/Kg ND 94 3 <br /> Toluene 8020 . 005 mg/Kg ND 97 4 <br /> Xylenes 8020 . 010 mg/Kg ND 96 3 <br /> Diesel 8015M 1 . 0 mg/Kg ND 122 2 <br /> ELAP Certificate N0:1753 <br /> Reviewed and Approved <br /> �L Zx <br /> Page 4 of 4 <br /> John A.Murphy,Laboratory Director <br /> P. 0 . Box 5624 • South San Francisco, California 94083 650-588 -2838 FAX 588 - 1950 <br />