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Sequoia 1455 McDowellPetaluma,CA 94954 <br /> 1 1 ) Analytical (707)792-1865 <br /> FAX 792-0342 <br /> www sequoiequoiala6s coin <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P312737 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50265 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/13/04 19 10 <br /> Purgeable Hydrocarbons by EPA 8015B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4010035-EPA 503042 waters <br /> Blank(4010035-BLKI) Prepared&Analyzed 01!06104 <br /> Gasoline Range Organics ND 50__ ug/l T <br /> Surrogate 4-Bromofluorobenzene 279 300 93 65-135 <br /> Laboratory Control Sample 4010035-BSl Prepared&Analyzed 01/06/04 <br /> Gasoline Mange Organics 2490 50 ugil 2750 91 65-135 <br /> Surrogate 4-Bromofluorobenzene 293 300 98 65-135 <br /> Matrix Spike(4010_035_-M_ _S12 _ Source P312703-01 Prepared&Analyzed 01/06/04 <br /> Gasoline Range Organics 2430 50 ug/l 2750 22 88 65-135 <br /> Surrogate 4-Bromofluorobenzene 284 300 95 65-135 <br /> Matrix Spike Du 4070035-MSD1Source P312703-01 Prepared&Analyzed 01/06/04 <br /> • Gasoline Range Organics 2430 50 11911 2750 22 88 65-135 0 20 <br /> Surrogate 4-Bromofluorobenzene 290 11300 97 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stared results are reported on a wet weight <br /> basrs This analytical report must be reproduced in its entirety <br /> Page 7 of 10 <br />