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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma, CA 94954 <br /> + <br /> ( (707)792-1865 <br /> Analytical FAX(707)792 0342 <br /> www sequoialahs co� <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P403078 <br /> 3017 Kilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03/19/04 15 02 <br /> Purgeable Hydrocarbons by EPA 8015B -Quahty Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC APD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit ]Votes <br /> Batch 4030128-EPA 5030B waters <br /> Blank(4030728-BLKI) Prepared&Analyzed 03/05/04 _ <br /> Gasoline Range Organics ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 190 300 97 65-135 <br /> Laboratory Control Sample(4030128-BSI) Prepared&Analyzed 03/05/04 <br /> Gasoline Range Organics 2230 50 ug/1 2750 81 65-135 <br /> Surrogate 4-Bromofluorobenzene 304 300 101 65-135 <br /> Matnx S ike 4030128-MSI Source P402528-01 Pre ared&Analyzed 03/05/04 <br /> Gasoline Range Organics 2250 50 ug/1 2750 15 81 65-135 <br /> Surrogate 4-Bromofluorobenzene 301 300 100 65-135 <br /> Matrix Spike Du 4030128-MSD1 Source P402528-01 Prepared&Analyzed 03/05/04 <br /> Gasoline Range Organics 2300 50 ug/l 2750 15 83 65-135 2 20 <br /> Surrogate 4-Bromofluorobenzene 310 300 103 65-135 <br /> Batch 4030175-EPA 5030B,waters <br /> Blank 4030175-BLKI Prepared&Anal ed 03/08/04 <br /> Gasoline Range Organics(C6-C10) ND 50 ugll <br /> Surrogate 4-Bromofluorobenzene 180 300 93 65-135 <br /> Laboratory Control Sample(4030175-BSI) Prepared_&Analyzed 03/08/04 <br /> Gasoline Range Organics(C6-C10) 2120 50 ugA 2750 77 65-135 <br /> Surrogate 4-Bromofluorobenzene 298 300 99 65-135 <br /> Matnx Spike(4030175-MSI) -- -_ Source P403052-01 Prepared&Analyzed 03/08/04 <br /> Gasoline Range Organics(C6-C10) 2210 50 ug/I 2750 13 80 65-135 <br /> Surrogate 4-Bromofluorobenzene 297 300 99 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 stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety 0 <br /> Page 10 of 23 <br />