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r <br /> 819 Striker Avenue Sulte 8 <br /> Sequoia 916)92 ento CA99600 <br /> FAX(916)921-0100 <br /> Analytical www sequotalabs com <br /> Apr <br /> SECOR International-Rancho Cordova Project Arca 4932 Stockton,CA <br /> 3017 Kilgore Road Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 05/29/01 17 59 <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 /> Analyte Result Limit Unus Level Result 0/.RFC Limits RPD Limit Notes <br /> Batch 1050175- EPA 5030B (PIT) <br /> Blank(1050175-BLKI) - Prepared 8 Analyzed 05/11/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0.'00 <br /> Elhylbenzene ND 0 s00 " <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butNI ether ND 2--)0 <br /> Surrogate a a a-Trti luorotoluene 9-)4 1077 95 4 60-140 <br /> I <br /> LCS(1050175-BSI) _- - - _- _ Prepared&Analyzed 05/11101 <br /> Benzene 874 0 500 ug/l 10 0 87 4 70-130 <br /> T ene 997 0 500 10 0 997 70-130 <br /> enzene 10 6 0-)00 10 0 106 70-130 <br /> .nes(total) 316 0 500 300 105 70-130 <br /> Methyl ten-butyl ether 9 17 250 100 91 7 70-130 <br /> Surrogate a a a-Triluorotoluene f 936 1100 93 6 60-140 <br /> _M_atrix Spike(1050175_MSI) -� Source S105175-01 Prepared&Analyzed 05/11/01 <br /> Benzene 871 0 500 ug/l i0 0 ND 87 1 60-140 <br /> Toluene 100 0 500 110 0 ND 100 60-140 <br /> Ethylbenzene 109 0 500 " 10 0 ND 109 60-140 <br /> Xylenes(total) 323 0 500 300 ND 108 60-140 <br /> Methyl tert-butyl ether 576 2 50 100 426 150 60-140 Q-LIM <br /> Surrogate a a a-Triuorotoluene 903 " 100 903 60-140 - <br /> Matrix Spike Dup(1050175-MSDI) - - Source 5105175-01 Prepared&Analyzed 05/11/01 — - <br /> Benzene 906 0 500 ugll 100 ND 906 60-140 394 25 <br /> Toluene 10 4 0 500 100 ND 104 60-140 3 92 25 <br /> Ethylbenzene 11 8 0 500 1100 ND 118 60-140 793 25 <br /> Xylenes(total) 33 5 0 500 300 ND 112 60-140 365 25 <br /> Methyl tert-butyl ether 58 8 2 50 10 0 426 162 60-140 206 25 Q-LIM <br /> Surrogate a a a-Triuorotoluene 917 1100 91 7 60-140 <br /> AML <br /> uola Analytical- Sacramento The results in this report apply 10 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 9 <br />