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819 Striker Avenue Suite 8 <br /> Sequoia qua"' 5834 <br /> 916)92199600 <br /> FAX(9 16)921-0 100 <br /> Analytical www sequoialabs corn <br /> SECOR Inti mational-Rancho Cordova Project ARCO 2133 Stockton CA <br /> 3017 Kilgore Road,Suitt, 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 05/24/01 17 25 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1050195- EPA 5030B(PIT) <br /> Blank(1050195-BLK1) _ Prepared&Analyzed-05/14/01 <br /> Purgeable Hydrocarbons _ ND 500 ugh <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 2 50 <br /> Surrogate aaa-Triluorotolaene 861 100 861 60-140 <br /> LCS(1050195-BSI) _ Prepared&Analyzed 05/14/01 <br /> Benzene 751 0 500 ug/l too 75 1 70-130 <br /> Z' rte 8 67 0 500 100 867 70-130 <br /> nzesre 9 33 0 500 100 933 70-130 <br /> Xy ents(total) <br /> 287 0 500 300 957 70-130 <br /> Methyl tert-butyl ether 7 04 250 100 704 70-130 _ <br /> Surrogate a a a-Trifluorotoluene 8 73 100 873 60-140 <br /> Matrix Spike(1050195--MSl)_T — Source S105174-04 Prepared&Analyzed 05/14/01 _� W <br /> Benzene 739 0 500 ugA too ND 73 9 60-140 <br /> Toluene 889 0 500 100 ND 88 9 60-140 <br /> Ethylbenzene 913 0 500 100 ND 913 60-140 <br /> Xylenes(total) 285 0 500 300 ND 950 60-140 <br /> Methyl text-butyl ether 604 250 100 ND 604 60-140 <br /> Surrogate a a a-Trouorotoluene 831 100 831 60-140 <br /> Matrix Spike Dup(1050195-MSD1) Source 5105174-04 Prepared&Analyzed 05/14/01 T T <br /> Benzene 726 0 500 ugll 100 ND 72 6 60-140 1 77 25 <br /> Toluene 867 0 500 100 ND 867 60-140 251 25 <br /> Ethylbenzene 900 0 500 100 ND 900 60-140 143 25 <br /> Xylenes(total) 282 0 500 300 ND 940 60-140 106 25 <br /> Methyl tent-butyl ether 608 250 100 ND 608 60-140 0 660 25 <br /> Surrogate aaa-Triuorotoluene 790 100 790 60-140 <br /> Adak <br /> oia 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 in its entirety <br /> Page 6 of 8 <br />