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( uoia 1455 ML.Do%ell Blvd,North Ste D <br /> Petaluma LA 94954 <br /> 65 <br /> 1A In 'V Ica FAX(707)792-0142 <br /> e <br /> www sequoia]ibs coni <br /> URS Corp-Sacramento Project Arco Site 5469 Stockton CA P403099 <br /> 2870 Gateway Oats DriVC Stute 300 Project Number WR36605 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/06/04 17 16 <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 °%PEr- Limits RPD Limit Notes <br /> Batch 4030175-EPA 5030B,waters <br /> Blank(4030175-BLKI) Prepared&Analy7ed 03/08/04 <br /> Gasoline Range Organii,s(C6-C 10) ND 50 ugd <br /> Sur i ogate 4-Bi orijofluor ohenzene 280 300 93 65-135 <br /> Laboratory Control Sample(4030175-BSI) Prepared&Analyzed 03/08/04 <br /> Gasoline Range Orgautcs(C6-C 10) 2120 50 119/1 _ 2750 77 65-135 <br /> Smiogate 4-Biornothimobenweire 298 300 99 65-135 <br /> M4trir Spike(4010175-MSI) Source P401052-01 Prepared&Analyzed 03/08/04 <br /> Gasoline Range Organics(C6-00) 2210 50 UO 2750 13 80 65-135 <br /> Siniogate 4-Bionioffimohen:ene 297 300 99 65-135 <br /> Matrix Spike pup(4030175-MSD1) Source P403052-01 Prepared&Analyzed 03/08/04 <br /> solineRan c Or amc,,(C6-CIO) 2130 50 ugl2750 13 <br /> 77 65-135 4 20 <br /> ngui 4-Biontoflttmobeti_ene 297 300 99 65-135 <br /> Batch 4030176-EPA 5030B,w aters <br /> Blank(4030176-BLKI) Prepared&.Analyzed 03/08/04 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> Surrogate 4-Btornofluoioheii_cne 280 300 93 65-135 <br /> Laborator Control Sample(4030176-BS t) Pre ared&Anal led 03/08/04 <br /> Gasoline Range Organics(C6-CIO) 1950 50 ugJ 2750 71 65-135 <br /> Surrogate 4-Bromo&o ohen�ttic 295 300 98 65-135 <br /> Matrix Spike(4030176-MSI) Source P403098-01 Prepared&Analyzed 03/08/04 <br /> Gasoline Range Organics(C6-C 10) 4090 50 ug/l 2750 2200 68^ 65-135 <br /> Surimate 4-Biomoflumopen.eiie 291 11 300 97 65-135 <br /> iota Analytical-Petaluma The iesulls in this iepoi t applt to the samples anull_ed m accoirlunce vith the chain <br /> of c ustodi docriniew Unless other N ise sluted i etults ai e i eprri ted nn a it et 17 eight <br /> haws This analytrca!ieprn t utast he ieprnducecl rn its eruueti <br /> Page 18 of 35 <br />