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North State Environmental <br /> LChemical West@ Disposal •Trucking- Consulting <br /> CERTIFICATE OF ANALYSIS <br /> L <br /> Quality Control/Quality Assurance <br /> LLab Number: 98-1524 <br /> Client: Semco <br /> Project: Corral Hollow Rd. <br /> L <br /> Date Reported: 12/08/98 <br /> LDiesel Range Hydrocarbons by Method 8015 M <br /> Gasoline,BTEX and MTBE by Methods 8015M and 8020 <br /> L <br /> L <br /> Reporting MS/MSD <br /> L Analyte Method Limit Unit <br /> Blank Recovery RPD <br /> LDiesel 8015M 1. 0 mg/Kg ND 104 0 .4 <br /> Gasoline 8015M 0 . 5 mg/Kg ND 106 0 . 3 <br /> LBenzene 8020 . 005 mg/Kg ND 107 1 <br /> Ethylbenzene 8020 . 005 mg/Kg ND 95 0 <br /> Toluene 8020 . 005 mg/Kg ND 97 2 <br /> LXylenes 8020 . 010 mg/Kg ND 100 0 <br /> MTBE 8020 .005 mg/Kg ND 112 4 <br /> L <br /> L <br /> L <br /> L <br /> LELAP Certificate/]O:1753 <br /> Reviewed art/d Approved................... <br /> Page 4 of 4 <br /> John. A.Murphy,La ratory'Director <br /> P,! 0. Brox 5624 - South San Francisco. California 94083 650-588-2838 FAX 583 - 1950 <br /> L <br />