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885 Jarvis Drive <br /> ' Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> + ► Analytical FAX(408)782 6308 <br /> www sequoialabs com <br /> Stratus Environmental Inc Project ARCO#6100 MNB0610 <br /> 3330 Cameron Park Dr,,Suite 550 Prolect Number NIP Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/23/04 18 50 <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 %REC Limits RPD Limit Notes <br /> Batch 4020620-EPA 5030,soils <br /> Blank(4020620-BLKI) Prepared&Analyzed 02/27/04 <br /> Gasoline Range Organics ND 10 mg/kg <br /> Surrogate 4-Bromof7uorobenzene 0 283 0 300 94 65-135 <br /> Laboratory Control Sample(4020620-BS1) Prepared&Analyzed 02/27/04 <br /> Gasoline Range Organics 244 1 0 mg/kg 275 89 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 288 0 300 96 65-135 <br /> Matrix Spike 4020620-MS1 Source P402493-01 Prepared&Analyzed 02/27/04 <br /> Gasoline Range Organics 1 97 10 mg/kg 2 75 0 18 65 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 231 0 300 77 65-135 <br /> Matrix Spike Dup(4020620-MSD1) Source P402493-01 Prepared&Analyzed 02/27/04 <br /> Gasoline Range Organics 3 12 10 mg/kg 2 75 0 18 107 65-135 45 20 QC21 <br /> ogate 4-Bromofluorobenzene 0 285 0 300 95 65-135 <br /> Batch 4030042-EPA 5030B,soils McOH <br /> Blank(4030042-BLKI) Prepared&Analyzed 03/01/04 <br /> Gasoline Range Organics ND 100 mg/kg <br /> Surrogate 4-Bromofluorobenzene 0 541 0 600 90 65-135 PES] <br /> Laboratory Control Sample(4030042-BSI) Prepared 03/0t/04 Analyzed 03/02/04 <br /> Gasoline Range Organics 4 77 2 0 mg/kg 5 50 87 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 582 0 600 97 65-135 <br /> Laboratory Control Sample Dup(4030042-BSD1) Prepared 03/01/04 Analyzed 03/02/0.4_ <br /> Gasoline Range Organics 4 78 2 0 mg/kg 5 50 87 65-135 0 2 20 <br /> Surrogate 4-Bromofluorobenzene 0 578 110 600 96 65-135 <br /> �oia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 1 1 of 16 <br />