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Sequoia 1455 McDowell Blvd North Ste b <br /> 1 Petaluma,CA 94954 <br /> (707) 792-18{5 <br /> �„ - Analytical FAX(707) 792-0342 <br /> 0 <br /> Sequoia San Carlos Project Subbed in Sampled 4/22/99 <br /> 1551 Industial Blvd Project Number L904337 Received 4/28/99 <br /> San Carlos,CA 94070 Project Manager Mike Gregory Reported 5/6/99 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD =%/. N <br /> Anal a Analyzed Level Result Result Units Recov Limits % Lirmt <br /> Matrix Spike 9050079-MSI P904776-03 <br /> Methyl tert-butyl ether 5/4/99 500 ND 5 13 ug/l 727-119 103 <br /> Surrogate Dibromofluoromethane 500 493 866--118 986 <br /> Surrogate 1 2-Dichloroethane-d4 500 535 800-120 107 <br /> Surrogate Toluene-d8 500 467 880-110 934 <br /> Surrogate 4-Bromofluorobenzene 500 482 860-115 964 <br /> Matrix Spike Dup 9050079-MSD1 P904776-03 <br /> Methyl tent-butyl ether 514/99 500 ND 5 29 ug/1 727-119 106 200 2 87 <br /> Surrogate Dibromofluoromethane of 500 523 860-118 105 <br /> Surrogate 1 2-Dichloroethane-d4 It <br /> 500 548 800-120 110 <br /> Surrogate Toluene-d8 500 4 74 880-110 948 <br /> Surrogate 4-Bromofluorobenzene 500 4 89 860-115 978 <br /> Sequoia Analytical-Petaluma *Refer to end of repor!for text of notes and definiha <br /> p Page 5 of 6 <br /> `eti <br />