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Sequoia <br />� Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoWabs com <br />CMIler Rvan Inc -Dublin Project Cheaper <br />6747 Sierra Court Suite 7 Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 12 -Apr -00 11 36 <br />Total Purgeable Hydrocarbons (C&C12) and BTEX in Air by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creep <br />Reporting Spike Source %REC RPD <br />analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OD10015 - EPA 5030B IP/TJ <br />570 <br />600 950 70.130 <br />Blank (OD1O015-BLKI) <br />Prepared &. Analvzed 06 -Apr -00 <br />Purgeable Hydrocarbons <br />ND <br />2 0 mg/m3 Air <br />200 825 70-130 <br />Benzene <br />ND <br />0010 <br />200 850 70.130 <br />Toluene <br />ND <br />0 010 <br />200 800 70.130 <br />Ethylbenzcne <br />ND <br />0 010 <br />600 917 70.130 <br />Xvlenes (total) <br />ND <br />0 010 " <br />600 853 70-130 <br />Surrogate a a a-Tnfluorotoluene <br />5 71 <br />600 953 -0130 <br />Blank (OD10015-BLK2) <br />340 <br />0 010 mglm° Am <br />Prepared & Analyzed 08 -Apr -00 <br />Purgeable Hydrocarbons <br />ND <br />2 0 mg/m} Air <br />400 975 70-130 <br />Benzene <br />ND <br />0 010 " <br />400 870 70-130 <br />'toluene <br />ND <br />0 010 <br />120 958 70-130 <br />Ethylbenzene <br />ND <br />0 010 " <br />600 900 70-130 <br />10 (total) <br />ND <br />0 010 " <br />S'(Mgale saa-Tnfluorotoluene <br />570 <br />600 950 70.130 <br />LCS (OD10015-BSI) <br />Prepared & Analyzed 06 -Apr -00 <br />Benzoic <br />165 <br />0 010 mem' Air <br />200 825 70-130 <br />Toluene <br />170 <br />0 010 <br />200 850 70.130 <br />Ethytba=ft <br />160 <br />0 010 <br />200 800 70.130 <br />%ylenes ft") <br />550 <br />0 010 <br />600 917 70.130 <br />SiiwMate gga-TnJlaorotoWm <br />511 <br />600 853 70-130 <br />L.CS (ODIOOIS-BS2) <br />Prepared & Analyzed 08 -Apr -00 <br />Baraene <br />340 <br />0 010 mglm° Am <br />400 950 70-130 <br />Toluene <br />350 <br />0 010 <br />400 975 70-130 <br />Mylbenzcne <br />348 <br />0 010 <br />400 870 70-130 <br />%yienes (total) <br />115 <br />0 010 <br />120 958 70-130 <br />Surrogate aaa-Tnfluorotoluene <br />540 <br />600 900 70-130 <br />nota Analytical - Walnut <br />The results in this report apply to the samples analyzed in accoram:ce with ine cnain of <br />custody document This analytical report must be reproduced in its entrrery <br />Page 8 of 12 <br />