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1455 McMwell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> Analytical (707)792-1865 <br /> FAX(707)792-0342 <br /> WWW sequmlabs coin <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P406495 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/29/04 17 56 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4GO5001 -EPA 5030E IMI <br /> Blank(4G05001-BLKI) Prepared&Analyzed 07105104 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/t <br /> Surrogate 4-Bromofluorobenzene 334 400 84 70-130 <br /> Laboratory Control Sample(4G05001-BS2) Prepared&Analyzed 07/05/04 <br /> Gasoline Range Organics(C4-C12) 219 50 ugA 250 88 62-134 <br /> Surrogate 4-Bromofluorobenzene 357 400 89 70-130 <br /> Matrix Spike(4G05001-MS1) Source P406495-01 Prepared&Analyzed 07/05/04 <br /> Gasoline Range Organics(C4-C12) 536 50 ug/l 550 ND 97 62-134 <br /> Surrogate 4-Bromofluorobenzene 391 400 98 70-130 <br /> Matrix Spike Dap(4G05001-MSD1) Source P406495-01 Prepared&Analyzed 07/05/04 <br /> Gasolme Range Organics(C4-C 12) 547 50 ugR 550 ND 99 62-134 2 41 <br /> rrogate 4-Bromofluorobenzene 388 400 97 70-130 <br /> Batch 4GO7005-EPA 5030EJP/TJ <br /> Blank(4G07005-BLKI) Prepared&Analyzed 07/07/04 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 307 400 77 70-130 <br /> Laboratory Control Sample(4G07005-BS2) Prepared&Analyzed 07/07/04 <br /> Gasoline Range Organics(C4-C12) 251 50 ug/l 250 100 62-134 <br /> Surrogate 4-Bromofluorobenzene 352 400 88 70-130 <br /> Matrix Spike(4G07005-MS1) Source P406495-07 Prepared&Analyzed 07/07/04 <br /> Gasoline Range Organics(C4-C12) 477 50 ugll 550 ND 87 62-134 <br /> Surrogate 4-Bromofluorobenzene 374 " 400 94 70-130 <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 /> Ars analytical report must be reproduced in its entirety <br /> Page 25 of 41 <br />