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1455 McDowell Blvd North Ste <br /> Sequoia Petaluma CA 949544 <br /> (767)792-1865 <br /> 164W Analytical Analytical <br /> FAX 342 <br /> vnvsequotalabs con' <br /> URS Corp-Sacramento Project Arco ie 6100 Tracy CA P412386 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0287 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 01111105 08 02 <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 %RHC Limits RPD Limit Notes <br /> Batch 4120548-EPA 503013,waters 1 EPA 8015B-VOA <br /> Blank(4120548-BLK1) Prepared&Analyzed 12/29/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/I <br /> Surrogate 4-Bromofluorobenzene 259 300 86 80-110 <br /> Laboratory Control Sample(4120548-BSI) Prepared&Analyzed 12/29/04 <br /> Gasoline Range Organics(C4-C 12) 2860 50 ugll 2750 104 67-101 HL <br /> Surrogate 4-Bromof7uorobenzene 304 300 101 80-110 <br /> Matrix Spike(4120548-MSI) Source P412368-03 Prepared&Analyzed 12/29/04 <br /> Gasoline Range Organics(C4-C 12) 2840 50 ugll 2750 57 101 67-101 <br /> Surrogate 4-Bromofluorobenzene 305 300 102 80-110 <br /> Matrix Spike Dup(4120548-MSD1) Source P412368-03 Prepared&Analyzed 12/29/04 <br /> gdoCasolme 12) 2750 50 ug/l 2750 57 98 67-101 3 20 <br /> rrogate 4-Bromofluorobenzene 305 300 102 80-110 <br /> Batch 4120569-EPA 5030 B,waters 1 EPA 8015B-VOA <br /> Blank(4120569-BLK1) Prepared&Analyzed 12/30/04 <br /> Gasoline Range Organics(C4 C 12) ND 50 ug/I <br /> Surrogate 4-Bromofluorobenzene 273 300 91 80-110 <br /> Laboratory Control Sample(4120569-BSI) Prepared&Analyzed 12/30/04 <br /> Gasoline Range Organics(C4-C 12) 2880 50 ugll 2750 105 67-101 HL <br /> Surrogate 4-Bromofluorobenzene 305 300 102 80-110 <br /> Matrix Spike(4120569-MSI) Source P412423-06 Prepared&Analyzed 12/30/04 <br /> Gasoline Range Organics(C4-C]2) 2950 50 ugll 2750 68 105 67-101 HL <br /> Surrogate 4-Bromofluorobenzene 304 11300 101 80-110 <br /> Sequoia Analytical-Petaluma The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced to its entirety <br /> Page 10 of 15 <br />