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1 <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> a— )� (747)792-1865 <br /> Analytical <br /> FAX(701)792A342 <br /> www sequotalabs com <br />• <br /> URS Corp-Sacramento Project Arco Site 6020,Manteca,CA P502227 <br /> 2870 C,tateway Oaks Drive Suite 300 Project Number lntrtm-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/26/05 14 14 <br /> Purgeable Hydrocarbons by EPA 8015B- Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result 9/oREC limits RPD Limit Notes <br /> Batch 5020229-EPA 503013,waters/EPA 8015B-VOA <br /> Blank(5020229-BLK1) Prepared&Analyzed 02/16/05 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/I <br /> Surrogate 4-Bromofluorobenzene 164 300 88 80-110 <br /> Laboratory Control Sample(5020229-BSI) Prepared&Analyzed 02/16/05 <br /> Gasoline Range Organics(C4-C 12) 2840 50 ug/l 2750 103 67-101 HL <br /> .Surrogate 4-Bromofluorobenzene 286 300 95 80-110 <br /> Matrix Spike(5020229-MSI) Source P502216-01 Prepared&Analyzed 02/16/05 <br /> Gasoline Range Organics(C4-C 12) 2800 50 tie 2750 ND 102 67-101 HL <br /> Surrogate 4-Bromofluorobenzene 318 300 106 80-110 <br /> Matrix Spike Dup(5020229-MSDI) Source P502216-01 Prepared&Analyzed 02/16/05 <br /> Gasoline Range Organics(C4-C 12) 2800 50 ug/I 2750 ND 102 67-101 0 20 HL <br /> Surrogate 4-Bromofluorobenzene 317 11300 106 80-110 <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 /> 77iis analytical report must be reproduced in its entirety <br /> Page 13 of 18 <br />