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1 <br /> :l <br /> 1455 McDowell Blvd North ate D <br /> Sequoia Petaluma,Ci) (707)7921865 <br /> Analytical FAX(707)7920342 <br /> www sequoialabs cam <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P403188 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/12/04 10 17 <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 Lund Notes <br /> Batch 4030397-EPA 503013,waters <br /> Blank(4030397-BLK1) Prepared&Analyzed 03/15/04 <br /> Gasoline Range Organics(C6-C 10) ND 50 ugA <br /> Surrogate 4-Bromofluorobenzene 278 300 93 65-135 <br /> Laboratory Control Sample(4030397-BS1) Prepared&Analyzed 03/15/04 <br /> Gasoline Range Organics(C6-C 10) 2440 50 ugR 2750 89 65-135 <br /> Surrogate 4-Bromofluorobenzene 297 300 99 65-135 <br /> Matrix Spike(4030397-MSI) Source P403188-01 Prepared&Analyzed 03/15/04 <br /> Gasoline Range Organics(C6-C10) 3200 50 ug/l 2750 770 88 65-135 <br /> Surrogate 4-Bromofluorobenzene 305 300 102 65-135 <br /> Matrix Spike Dup(4030397-MSD1) Source P403198-01 Prepared&Analyzed 03/15/04 <br /> Gasoline Range Organics(C6-C 10) 3210 50 ug/l 2750 770 89 65-135 03 20 <br /> rrogale 4-Bromofluorobenzene 305 300 102 65-135 <br /> Batch 4030398-EPA 503013 waters <br /> Blank(4030398-BLKI) Prepared&Analyzed 03/15/04 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 278 300 93 65-135 <br /> Laboratory Control Sample(4030398-BS1) Prepared&Analyzed 03/I5/04 <br /> Gasoline Range Organics(C6-C 10) 2320 50 ug/l 2750 84 65-135 <br /> Surrogate 4-Bromofluorobenzene 295 300 98 65-135 <br /> Matrix Spike(4030398-MSI) Source P403201-13 Prepared&Analyzed 03/15/04 <br /> Gasoline Range Organics(C6-C10) 2190 50 ug/l 2750 31 79 65-135 <br /> Surrogate 4-Bromofluorobenzene 287 300 96 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 /> 0 This analytical report must be reproduced in its entirety <br /> Page 25 of 34 <br />