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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma,G94954 <br /> Analytical (707)799 2-1 <br /> 865 <br /> FAX(767)792-0342 <br /> www sequrnalabs coinom. <br /> is <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P409434 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36593 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/08/04 09 40 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source '/uREC RPD <br /> Analyte Result Limit Units Level Result "/OREC Limits RPD Limit Notes <br /> Batch 4090730-EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(4090730-BLKI) Prepared&Analyzed 09/29/04 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/1 <br /> Surrogate 4-Bromofluorobenzene 277 300 92 804-110 <br /> Laboratory Control Sample(4090730-BS1) Prepared&Analyzed 09/29/04 <br /> Gasoline Range Organics(C4-C 12) 2110 50 ug/l 2750 77 67-101 <br /> Surrogate 4-Bromofluorobenzene 194 300 98 804-110 <br /> Matrix Spike(4090730-MSI) Source P409434-03 Prepared&Analyzed 09/29/04 <br /> Gasoline Range Organics(C4-C12) 2120 50 ug/l 2750 ND 77 67-101 <br /> Surrogate 4-Bromofluorobenzene 306 300 102 804-110 <br /> Matrix Spike Dup(4090730-MSD1) Source P409434-03 Prepared&Analyzed 09/29/04 <br /> Gasoline Range Organics(C4-C12) 2110 50 ug/i 2750 ND 77 67-101 05 20 <br /> - <br /> gate 4-Bromofluorobenzene 304 300 101 804-110 <br /> Batch 4090758-EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(4090758-BLK1) Prepared&Analyzed 09/30/04 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 295 300 98 804-110 <br /> Laboratory Control Sample(4090758-BSI) Prepared&Analyzed 09/30/04 <br /> Gasoline Range Organics(C4-C12) 2080 50 ug/1 2750 76 67-101 <br /> Surrogate 4-Bromofluorobenzene 304 300 101 804-110 <br /> Matnx Spike(4090758-MS1) Source P409444-05 Prepared&Analyzed 09/30/04 <br /> Gasoline Range Organics(C4-C 12) 2060 50 ug/l 2750 ND 75 67-101 <br /> Surrogate 4-Bromofluorobenzene 297 300 99 804-110 <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 /> This analytical report must be reproduced in its entirety <br /> 0 <br /> Page 15 of 21 <br />