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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 a- ) (416)921-9600 <br /> Analytical FAX equo alabs921 c 00 <br /> tniw+w sequoialabs com <br /> SO <br /> SECOR International-Rancho Cordova Project Chevron 9-1452,Ripon,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43545 150 Reported <br /> Rancho Cordova CA 95670 Project Manager Scott Gable 08/23/01 15 33 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1080072-EPA 5030B (MeOH) <br /> Blank(1080072-BLKI) Prepared&Analyzed 08/06/01 <br /> Purgeabte Hydrocarbons ND 50 mg/k.- <br /> Benzene ND 0 025 " <br /> Toluene ND 0 025 <br /> Ethylbenzene ND 0 025 " <br /> Xylenes(total) ND 0 025 " <br /> Methyl tert-butyl ether ND 025 " <br /> Surrogate a a a-Tris luorotoluene 105 100 105 60-140 <br /> LCS(108007.2-BSI) __ Prepared&Analyzed 08/06/01 _ <br /> Benzene 1 07 0 025 mg/kg l 00 107 70-130 T <br /> Toluene 105 0 025 100 105 70-130 <br /> V.n(.t'=, 0997 0025 l 00 997 70-130 <br /> tta) 320 0 025 300 107 70-130 <br /> Methyl tert-butyl ether 0 897 025 1 00 897 70-130 <br /> Surrogate a a a-Trifluorotoluene 1 11 " 100 111 60-140 <br /> Matrix Spike(1080072-MSI) _ Source 5107384-10 Prepared&Analyzed 08/06/01 <br /> Benzene 0 990 0 025 mg/kg 1 00 ND 990 60-140 <br /> Toluene 0 976 0 025 " 100 0 058 918 60-140 <br /> Ethylbenzene 0 904 0 025 1 00 ND 904 60-140 <br /> Xylenes(total) 2 92 0 025 300 ND 973 60-140 <br /> Methyl tert-butyl ether 1 29 025 1 00 ND 129 60-140 <br /> Surrogate a a a-Trifluorololuene 106 100 106 60-140 <br /> Matrix Spike Dup(1080072-MSDI) Source 5107384-10 Prepared&Analyzed 08/06/01 <br /> Benzene 0 918 0 025 mg/kg 100 ND 91 8 60-140 755 25 <br /> Toluene 0 908 0 025 100 0 058 85 0 60-140 722 25 <br /> EthY]benzene 0 834 0 025 100 ND 83 4 60-140 806 25 <br /> Xylenes(total) 2 73 0 025 3 00 ND 91 0 60-140 673 25 <br /> Methyl tert-butyl ether 144 025 too ND 144 60-140 11 0 25 QM-07 <br /> Surrogate aa a-Tri luorotoluene 0 998 100 998 60-140 <br /> is Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 15 of 22 <br />