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Sequoia 1455?*Dow u Bid North SIC D <br /> Petaluma,CA 94954 <br /> Analytical FAX(707)792.D- <br /> www sequotalabs e <br /> Secor-Rancho Cordova Probit Arco Srie 4932,Stockton,CA P503205 <br /> 3017 Kdgare Road Suite 100 Project Number WR 63964 Reported ' <br /> Rancho Cordova CA,95670 Project Manger Rusty Benkosky 03/30/05 12 44 <br /> BTEX by 8021E -Quality Control <br /> Sequoia Analytical-Petaluma ' <br /> hewing Spike Source %REC RPD <br /> lAmol.We Result tame Units level Rewll %REC I.rmils RPD Limit Notes <br /> Batch 50301181 -EPA 5030B,waters/EPA 80218 ' <br /> Laboratory Control Sample Du 5030I81-BSDI Prepared A Analyzed 03/17/05 <br /> Methyl tent-butyl ether 186 056 ppmv 172 108 65-135 6 20 ' <br /> Meshy]tert-butyl ether 670 2 5 mg/ml Air 620 log 65-135 6 20 <br /> Surrogate.a4aa-7�17uarotoluenre 482 ppnty 503 96 65-135 <br /> Surrogate a,aa-Trlflrrororoluene 288 nig/mr.trr 300 96 65435 <br /> I� <br /> $equata Analytical-Petaluma Ths raa►u In this re t <br /> p�apply to rhe sample analysed rn accordance wrrh the chain of <br /> curlody document Unlesr atherwise stared,results ars reported an a wet welghr bark <br /> This analyrrcal report must be reproduced in its entirety <br /> 1 <br /> Page 15 of 20 <br />