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Sequoia 1455 McDowell Blvd North, Ste D <br /> Petaluma CA 94954 <br /> (707) 792-1865 <br /> Analytical <br /> FAX(707) 792-0342 <br /> ERI Project UnocaVrosco Sampled 5/21/99 <br /> 73 Digital Dr Suite 100 Prcject Number 227903UN4 Received 5/24/99 <br /> Novato,CA 94949 Project Manager Glenn Mattueccm Reported 5/30199 <br /> Total Metals by LPA 6000/7000 SenOs Methods/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> knalytc Analyzed Level Result Result Umts Recov Limits % Linut % Notes* <br /> WOO 9050797 Date Prepared 5/27/99 Extraction Method EPA 3050B <br /> Blank 9050797-BLKI <br /> Lead 5/27199 ND mg/kg 750 <br /> kCS 9050797-BSI <br /> ad 5127199 Soo 471 mg/kg 800-120 942 <br /> INMatnx S ike 9050797-MS1 P905632-28 <br /> ead 5/27/99 463 348 823 mgJkg 750-125 103 <br /> Atrix Spike Dup 9050797-MSDI P905632-28 <br /> ad 5/27199 481 348 795 mg/kg 750-125 929 200 103 <br /> i <br /> r <br /> t <br /> e <br /> uoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> i <br /> Page 4of5 <br />