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/rj1 Sequoia 1551IrlosCAlRoad <br /> "�=�"'' San Carlos CA 94070 <br /> i%w Analytical (650)232-9600 <br /> FAX(650)232_9612 <br /> www sequoaalabs coin <br /> Gettler-Ryan/Geostratepies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite I Project Number Tosco(Former BP)SS#11192 Stockton Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 11/21/01 1329 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %PEC Limits RPD Limit Notes <br /> Batch 1110065-EPA 5030B (P/T) <br /> Blank(1110065-BLKI) Prepared&Analyzed 11/16/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l i <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Triuorotoluene 864 100 864 70-130 <br /> LCS(1110065-BSI) Prepared&Analyzed 11/16/01 <br /> Benzene 104 050 ug/l 100 104 70-130 <br /> Toluene 102 050 10 0 102 70-130 <br /> Ethylbenzene 103 050 100 103 70-I30 <br /> Xylenes(total) 306 050 300 102 70-I30 <br /> Surrogate a,a a-Trifluorololuene 105 j' 100 105 70-130 <br /> LCS(1110065-BS2) Prepared&Analyzed 11/16/01 <br /> Purgeable Hydrocarbons as Gasoline 230 50 ugA 250 92 0 70-130 <br /> Surrogate a a a-Trifluorotoluene Il 6 11100 116 70-130 <br /> Matrix Spike(I I10065-MSI) Source L111077-03 Prepared&Analyzed 11/16/01 <br /> Benzene too 050 ug/1 10 0 ND 100 60-140 <br /> Toluene 10 2 050 100 ND 102 60-140 <br /> 1hk 1huizene 106 050 100 ND 106 60-140 <br /> %I airs(total) 31 3 050 300 ND 104 60-140 <br /> Surrogate a a a-Triuorotoluene Jos 10 0 105 70-130 <br /> Matrix Spike Du 0110065-MSD1) Source LI 11077-03 Prepared&Analyzed 11/16/01 <br /> Benzene 105 0 50 ug/I 10 0 ND 105 60-140 488 25 <br /> Toluene 10 6 050 100 ND 106 60-140 3 85 25 <br /> Ethylbenzene 11 0 050 100 ND 110 60-140 370 25 <br /> Xylenes(total) 324 050 300 ND 108 60-140 345 25 <br /> Surrogate a a a-Trifluorotoluene 10.5 100 105 70-130 <br /> Sequoia Analytical - San Carlos The results to this report apply to the samples analyzed in accordance with the chain <br /> custody document This anab Tical report must be reproduced in its emtreq> <br /> Page 10 of 19 <br />