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Sequoia 819 Sinker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> 4 1:�) (916)921-9600 <br /> FAX(916)92 1-0100 <br /> Analytical www sequoialabs com <br /> to <br /> SECOR International-Rancho Cordova Project ARCO 434, Lodi,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Pr41ect Manager Rusty Benkosky 05/27/01 12 49 <br /> Total Purgeable Hydrocarbons (C6-C12) 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 1050249- EPA 5030B(PIT) <br /> Blank(1050249-BLK1) _ _ _ na <br /> Prepared&Analyzed 05/18/01 <br /> ?urgeable Hydrocarbons ND 500 _ug/1 <br /> —__ <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Surrogate aaa-Triuorotoluene 838 100 838 60-140 <br /> LCS(1050249-BSI) Prepared&Analyzed 05/18/01 <br /> Benzene 889 0 500 ug/1 100 889 70-130 <br /> Toluene 929 0 500 t 0 0 929 70-130 <br /> Ethylbenzene 956 0 500 too 956 70-130 <br /> 3t�(total) 29 1 0 500 300 970 70-130 <br /> S ate a,a,a-Triuorotoluene 834 100 834 60-140 <br /> Matrix Spike(1050249-MSI) Source 5105212-06 Prepared&Analyzed 05/18/01 <br /> Benzene 875 0 500 ug/1 too ND 875 60-140 <br /> Toluene 935 0 500 100 ND 935 60-140 <br /> Ethylbenzene 948 0 500 l 0 0 ND 948 60-140 <br /> Xylenes(total) 291 0 500 300 ND 970 60-140 <br /> Surrogate a a,a-Trifluorotoluene 798 100 798 60-140 <br /> Matrix Spike Dup(1050249-MSD1) Source S105212-06 Prepared&Analyzed 05/18/01 <br /> Beaune 8 74 0 500 ug/l 100 ND 874 60-140 0 114 25 <br /> Toluene 938 0 500 100 ND 939 60-140 0 320 25 <br /> Ethylbcn=ne 949 0 500 100 ND 949 60-140 0 105 25 <br /> Xylenes(total) 291 0 500 300 ND 97 1) 60-140 0 25 <br /> Surrogate a a a-Trifluorotoluene 809 100 809 60-140 <br /> ola 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 entireiy <br /> Page 7 of I I <br />