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North State Environmental <br />Chemical Waste Disposal • Trucking - Consulting <br />CERTIFICATE OF ANALYSIS <br />Quality Control/Quality Assurance <br />Lab Number: 98-336 <br />Client• Compliance & Closure, Inc. <br />Project• #12118-1 / Quik Stop #121 <br />Date Reported: 03/31/98 <br />Gasoline and BTEX by Methods 8015M and 8020 <br />Reporting MS/MSD <br />Analyte Method Limit Unit Blank Recovery RPD <br />Gasoline <br />8015M <br />50 <br />ug/L <br />ND <br />88 <br />13 <br />Benzene <br />8020 <br />0.5 <br />ug/L <br />ND <br />93 <br />16 <br />Ethylbenzene <br />8020 <br />0.5 <br />ug/L <br />ND <br />101 <br />7 <br />Toluene <br />8020 <br />0.5 <br />ug/L <br />ND <br />100 <br />5 <br />Xylenes <br />8020 <br />1.0 <br />ug/L <br />ND <br />109 <br />3 <br />Gasoline <br />8015M <br />0.5 <br />mg/Kg <br />ND <br />82 <br />0 <br />Benzene <br />8020 <br />.005 <br />mg/Kg <br />ND <br />88 <br />9 <br />Ethylbenzene <br />8020 <br />.005 <br />mg/Kg <br />ND <br />93 <br />9 <br />Toluene <br />8020 <br />.005 <br />mg/Kg <br />ND <br />92 <br />9 <br />Xylenes <br />8020 <br />.010 <br />mg/Kg <br />ND <br />90 <br />7 <br />ELAP Certificate N0:1753 <br />Reviewed and Approved <br />Page 6 of 6 <br />John A.Murphy,Labora ory Director <br />P. 0. Box 5624 • South San Francisco, California 94083 • 650-588-2838 FAX 588-1950 <br />