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• 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> ' Analytical FAX(707)792-0342 <br /> www sequoialabs corn <br /> i <br /> UURS Corp-Sacramento Project Arco Site 6020,Manteca,CA P411364 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 12/04/04 14 40 <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 0 REC Limits RPD Limit Notes <br /> Batch 4110614-EPA 5030B,waters I EPA 8015B-VOA <br /> Matrix Spike Dup(4110614-MSDI) Source P411280-12 Prepared&Analyzed 11/23/04 <br /> Gasoline Range Organics(C4-C12) 348000 5000 agll 275000 83000 96 67-101 4 20 <br /> Surrogate 4-Bromofluorobenzene 273 304 91 80-110 <br /> Batch 4110655-EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(4110655-BLK1) Prepared 11/24/04 Analyzed 11/25/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 ugfl <br /> Surrogate 4-Bromofluorobenzene 236 300 79 80-110 LG <br /> Laboratory Control Sample(4110655-BSI) Prepared&Analyzed 11/24/04 <br /> Gasoline Range Organics(C4-C 12) 2240 50 ug/l 2750 81 67-101 <br /> .Surrogate 4-8romofluorobenzene 266 300 89 80-110 <br /> Matrix Spike(4110655-MSI) Source P411366-02 Prepared 11/24/04 Analyzed 11/25/04 <br /> AftGasoline Range Organics(C4-C 12) 2810 50 ug/l 2750 3800 NR 67-101 LN <br /> Surrogate 4-Bromofluorobenzene 273 300 91 80-110 <br /> Matrix Spike Dup(4110655-MSDI) Source P411366-02 Prepared 11/24/04 Analyzed 11/25/04 <br /> Gasoline Range Organics(C4-C 12) 2410 50 u9/1 2750 3800 NR 67-101 15 20 LN <br /> Surrogate 4-Bromofluorobenzene 270 300 90 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 /> Thu analytical report must be reproduced in its entirety <br /> Page 14 of 19 <br />