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L <br /> North State Environmental <br /> LChemical Waste Disposal •Tracking•Consulting <br /> L CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> LLab Number: 98-1555 <br /> Client: Semco <br /> i Project: Corral Hollow Rd. <br /> Date Reported: 12/07/98 <br /> LDiesel Range Hydrocarbons by Method 8015 M <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> L <br /> L <br /> LReporting MS/MSD <br /> Analyte Method Limit Unit Blank Recovery RPD <br /> LGasoline 8015M 0 . 5 mg/Kg ND 133 17 <br /> Benzene 8020 . 005 mg/Kg ND 107 1 <br /> LEthylbenzene 8020 . 005 mg/Kg ND 104 7 <br /> Toluene 8020 . 005 mg/Kg ND 106 13 <br /> Xylenes 8020 . 010 mg/Kg ND 110 3 <br /> ,MTBE 8020 . 005 mg/Kg ND 114 G5 <br /> Diesel 8015M 1 . 0 mg/Kg ND 102 0 . 6 <br /> L <br /> L <br /> L <br /> L <br /> LELAP Certifica N 1753 <br /> Reviewed and r ed <br /> , <br /> Y <br /> John A.MutP Y h Laborator Director <br /> Page 11 of 11 <br /> P. 0. Box 5634 • South San Francisco. California 94033 650-588.2838 FAX 538. 1950 <br /> L <br />