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' {M <br /> 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento )9 95834 <br /> (916)921-96009600 <br /> Analytical FAX(916)92"100 <br /> www sequoialabs com <br /> I 1W <br /> SECOR International-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/16/02 13 32 <br /> Total Purgeable Hydrocarbons and BTEX 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 2010192-EPA 5030B(PIT) <br /> Blank(2010192-BLK1) Prepared&Analyzed 01/15/02 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzenc ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluorotoluene 9 08 100 908 60-140 <br /> LCS(2010192-BS1) Prepared&Analyzed 01/15/02 <br /> Benzene 9 68 050 ug/1 100 968 70-130 <br /> Toluene 960 0 50 100 960 70-130 <br /> Ethylbenzene 9 18 0 50 10 0 91 8 70-130 <br /> Xylenes(total) _ 28 2 0 50 30 0 940 70-130 <br /> Surrogate a a a-Trifluorotoluene 992 100 992 60-140 <br /> Matnx Spike(2010192-MSI) Source S201099-05 Prepared&Analyzed 01/15/02 <br /> Benzene 9 32 0 50 ug/l 100 ND 932 60-140 <br /> Toluene 922 0 50 100 ND 922 60-140 <br /> Ethylbenzenc 8 89 0 50 100 ND 88 9 60-140 <br /> Xylenes(total) 274 0 50 300 ND 91 3 60-140 <br /> Surrogate a a a-Trtfluorotoluene 906 100 906 60-140 <br /> Matnx Spike Dup(2010192-MSD1) Source 5201099-05 Prepared&Analyzed 01/15/02 <br /> Benzene 105 050 u9/1 10 0 ND 105 60-140 11 9 25 <br /> Toluene 103 0 50 10 0 ND 103 60-140 11 1 25 <br /> Ethylbenzene 10 0 0 50 10 0 ND 100 60-140 11 8 25 <br /> Xylenes(total) 31 0 0 50 300 ND 103 60440 12 3 25 <br /> Surrogate a a a-Trifluorotoluene 983 100 983 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chat <br /> of custody document This analytical report must be reproduced in its entiret <br /> Page Page 19 of 23 <br />