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1455 McDowell Blvd,North Ste D <br /> Sequoia Petal(7 7)792-1865 <br /> Analytical www <br /> (707)792-0342 <br /> sequotalabs coin <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P306136 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36593 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/16/03 08 50 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 801513/802113- Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3060348-EPA 5030,waters <br /> Blank(3060348-BLKI) Prepared&Analyzed 06/16/03 <br /> Gasoline Range Organics ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Cthylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trfluorotoluene 294 300 98 65-135 <br /> Surrogate 4-Bromofluorobenzene 297 300 99 65-135 <br /> Laboratory Control Sample(3060348-BSI) Prepared&Analyzed 06/16/03 <br /> Gasoline Range Organics 2410 50 ug/l 2750 88 65-135 <br /> Benzene 397 050 335 119 65-135 <br /> Toluene 216 050 202 107 65-135 <br /> •Ethylbenz=c 45 2 050 „ 475 95 65-135 <br /> Xylenes(total) 234 050 240 98 65 135 <br /> Surrogate a a a-Trrfluorotoluene 332 300 111 65-135 <br /> Surrogate 4-Bromofluorobenzene 319 300 106 65-135 <br /> Matrix Spike(3060348-MSI) Source P306134-03 Prepared&Analyzed 06/16/03 <br /> Gasoline Range Organics tS 2370 50 ugll 2750 18 86 65-135 <br /> Benzene o,i G�IfQj 38 1 050 335 ND 114 65 135 <br /> Toluene G 215 050 202 022 106 65-135 <br /> Elhylbenzene 43 9 050 475 ND 92 65-135 <br /> Xylenes(total) 229 050 240 ND 95 65-135 <br /> Surrogate a a a-Trifluorotoluene 330 300 110 65-135 <br /> Surrogate 4-Bromofluorobenzene 320 300 107 65-135 <br /> Matrix Spike Dup(3060348-MSD1) Source P306134-03 Prepared&Analyzed 06/16/03 <br /> Gasolme Range Organics 2370 50 ug/1 2750 18 86 65-135 0 20 <br /> Benzene 376 050 33 5 ND 112 65-135 1 20 <br /> Toluene 208 050 202 022 103 65-135 3 20 <br /> Ethylbenzene 434 050 475 ND 91 65-135 1 20 <br /> Xylenes(total) 226 050 240 ND 94 65-135 1 20 <br /> Surrogate a a a-Trifluorotoluene 326 300 109 65-135 <br /> Surrogate 4-Bromofluorobenzene 321 300 107 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> • custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 15 <br />