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Striker Avenue Sequoia $19Sacramento CA 9u5834 (916)921-9600 16) q„W Analytical FAX ctuc 92]-0100 www sequoialabs corn SECOR International-Rancho Cordova Project Chevron 9-2396,Acampo,CA 3017 Kilgore Road, Suite 100 Project Number 077 43485 150 Reported Rancho Cordova CA,95670 Project Manager Roger Hoffmore 05/16/01 15 45 Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control Sequoia Analytical - Sacramento Reporting Spike Source %REC RPD Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes Batch 1050063- EPA 5030B(P/T) _Blank(1050063-BLK1) Prepared&Analyzed 05/03/01 Purgeable Hydrocarbons ND 500 ug/l Benzene ND 0 500 " Toluene ND 0 500 " Ethylbenzene ND 0 500 " Xylenes(total) NO 0 500 " Surrogate a a a-TrrJluorololuene 952 100 952 60-140 LCS(1050063-BS1) Prepared&Analyzed 05/03/01 Benzene 844 0 500 ug/l too 844 70-130 _ W Toluene 885 0 500 too 885 70-130 Ethylbenzene 9 25 0 500 100 925 70-130 A)Iftcs(total} 285 0 500 „ 300 95 0 70-130 gate a a a-Tr JTuorotoluene 932 100 932 60-140 Matrix Spike(1050063-MSI) Source 5104427-07 Prepared&Analyzed 05/03/01 Benzene 8 72 0 500 ug/l 100 ND 872 60-140 Toluene 920 0 500 too ND 920 60-140 Ethylbenzene 957 0 500 100 ND 95 7 60-140 Xylenes(total) 295 0 500 300 ND 983 60-140 Surrogate a a a-Triuorotoluene 939 100 939 60-140 Matrix Spike Dup(1050063-MSDI) Source 5104427-07 Prepared&Analyzed 05/03/01 Benzene 871 0 500 ug/l 100 ND 87 1 60-140 0 115 25 Toluene 920 0 500 10 0 ND 920 60-140 0 25 Ethylbenzene 9 59 0 500 100 ND 959 60-140 0209 25 Xylenes(total) 295 0 500 300 ND 983 60-140 0 25 Surrogate a a a-Triuorotoluene 926 100 926 60-140 �toia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of custody document This analytical report must be reproduced in its entirety Page 9 of 16