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(+ 819 Stnker Avenue Suite 8 <br /> Se(lIIola Sacramento )9 95834 <br /> (916)921-9600 <br /> 1r Analytical FAX(916)92 1-0100 <br /> 0- www sequwalabs com <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 06/17/02 11 52 <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 2060149-EPA 5030E PIT <br /> Blank(2060149-BLKI) Prepared&Analyzed 06/13/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 102 100 102 60-140 <br /> LCS(2060149-BSI) Prepared&Analyzed 06/13/02 <br /> Benzene 891 050 ug/l 100 89 70-130 <br /> Toluene 101 050 100 101 70-130 <br /> Ethylbenzene 107 050 100 107 70-130 <br /> Xylenes(total) 32 8 050 300 109 70-130 <br /> *urrogate a a a-Trfluorotoluene 11 1 100 111 60-140 <br /> Matrix Spike(2060149-MS1) Source S206143-01 Prepared&Analyzed 06/13/02 <br /> Benzene 887 050 ug/1 100 ND 89 60-140 <br /> Toluene 101 050 100 ND 101 60-140 <br /> Ethylbenzene 10 7 050 10 0 ND 107 60-140 <br /> Xylenes(total) 33 1 050 300 ND 110 60-140 <br /> Surrogate a a a-Trifluorotoluene 113 100 113 60-140 <br /> Matrix Spike Dup(2060149-MSDI) Source S206143-01 Prepared&Analyzed 06/13/02 _ <br /> Benzene 943 050 ug/l 100 ND 94 60-140 6 25 <br /> Toluene 108 050 100 ND 108 60-140 7 25 <br /> Ethylbenzene 114 050 100 ND 114 60-140 6 25 <br /> Xylenes(total) 35 2 050 300 ND 117 60-140 6 25 <br /> Surrogate a a a-Trifluorotoluene 112 100 112 60-140 <br /> equoia Analytical- Sacramento The results to 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 Page 6 of 9 <br />