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L1455 McDowell Blvd.North,Ste.D <br /> Sequoia <br /> Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical wFAX(707) 42 <br /> ww.sequoialalabs.cs.com <br /> Cambria Environmental Project: Equiva Sampled: 7/31/00 <br /> 270 Perkins St. Project Number: 7700 Moreland Ct,Stockton Received: 7/31/00 <br /> Sonoma,CA 95476 Project Manager: Scott Lewis Reported: 8/15/00 <br /> Volatile Organic Compounds by,EPA Method 826013/Quality Control <br /> Sequoia Analytical'-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Matrix Spike Dup 0080027-MSDI P007538-01 <br /> Methyl tert-butyl ether 8/1/00 125 ND 135 ug/kg 75.8-124 108 35.0 5.41 <br /> Surrogate: Dibromofluoromethane 11125 129 80.0-120 103 <br /> Surrogate: 1,2-Dichloroethane-d4 125 126 80.0-120 101 <br /> Surrogate: Toluene-d8 125 103 81.0-117 82.4 <br /> Batch: 0080195 Date Prepared: 8/8/00 Extraction Method: EPA 5030 soils McOH <br /> Blank 0080195-BLK1 <br /> Tert-amyl methyl ether 8/8/00 ND ug/kg 500 <br /> Tert-butyl alcohol ND 10000 <br /> Di-isopropyl ether ND 500 <br /> Ethanol ND 20000 <br /> Ethyl tert-butyl ether ND 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate: Dibromofluoromethane 2000 1870 80.0-120 93.5 <br /> Surrogate: 1,2-Dichloroethane-d4 2000 1840 80.0-120 92.0 <br /> Surrogate: Toluene-d8 2000 2100 81.0-117 105 <br /> LCS 0080195-BS1 <br /> Methyl tert-butyl ether 8/8/00 2000 2020 ug/kg 75.8-124 101 <br /> Surrogate: Dibromofluoromethane 2000 2040 80.0-120 102 <br /> Surrogate: 1,2-Dichloroethane-d4 2000 1980 80.0-120 99.0 <br /> Surrogate: Toluene-d8 2000 2080 81.0-117 104 <br /> Matrix Spike 0080195-MS1 P008010-10 <br /> Methyl tert-butyl ether 8/8/00 2000 ND 1840 ug/kg 75.8-124 92.0 <br /> Surrogate: Dibromofluoromethane 2000 1880 80.0-120 94.0 <br /> Surrogate: 1,2-Dichloroethane-d4 2000 1890 80.0-120 94.5 <br /> Surrogate: Toluene-d8 2000 1850 81.0-117 92.5 <br /> Matrix Spike Dup 0080195-MSDI P008010-10 <br /> Methyl tert-butyl ether 8/8/00 2000 ND 1950 ug/kg 75.8-124 97.5 35.0 5.80 <br /> Surrogate: Dibromofluoromethane 2000 1940 80.0-120 97.0 <br /> Surrogate: 1,2-Dichloroethane-d4 2000 1920 80.0-120 96.0 <br /> Surrogate: Toluene-d8 2000 1950 81.0-117 97.5 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 6 of 7 <br />