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1 t <br /> 1455 McDowell Blvd.North,Ste.D <br /> 4954 <br /> Sequoia Petal(07) 79291865 <br /> FAX(707)792-0342 <br /> Analytical www.sequoialabs.corn <br /> Cambria Environmental-Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Reported: <br /> Emeryville CA,94608 Project Manager: Owen Rastchye 11/20/00 10:41 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0110434-EPA 5030 waters <br /> LCS(0110434-BS1) - Prepared&Analyzed: 11/16/00 <br /> Benzene 4.66 0.500 ug/i 5.00 93.2 80-119 <br /> Methyl tert-butyl ether 4.68 0.500 5.00 93.6 79-118 <br /> Toluene 4.86 0.500 5.00 97.2 86-115 <br /> Surrogate:Dibromofluoromeihane 4.88 5.00 97.6 88-118 <br /> Surrogate:1.2-Dichloroethane-d4 4.82 5.00 96.4 81-130 <br /> Surrogate: Toluene-d8 5.02 5.00 100 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.35 5.00 107 78-124 <br /> LCS(0110434-BS3) _ Prepared&Analyzed: 11/17/00 _ <br /> Benzene --- - - 4.51 -- --0.500 ug/l 5.00 90.2 80-119 _ <br /> Methyl tert-butyl ether 4.32 0.500 5.00 86.4 79-118 <br /> uene 4.72 - 0.500 _ _5.00 - - 94.4 86-115 <br /> rogate:Dibromofluoromethane - _- - 4.73 " 5.00 94.6 m 88-118 - -- -� - <br /> Surrogate: l,2-Dichloroethane-d4 4.39 5.00 87.8 81-130 <br /> Surrogate: Toluene-d8 4,84 5.00 96.8 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.20 5.00 104 78-124 <br /> _Matrix Spike(011043_4-MS1)_ Source: P011118-06 Pr_e_pared&Analyzed: 11/16/00 <br /> Benzene 110 10.0 ugll 100 11.8 98.2 80-119 <br /> Methyl tert-butyl ether 99.7 10.0 100 ND 99.7 79-118 <br /> Toluene 260 10.0 100 163 97.0 86-115 <br /> Surrogate:Dibromofluoromethane 4.96 5.00 992 88-118 <br /> Surrogate: 1,2-Dichloroethane-d4 4.82 5.00 96.4 81-130 <br /> Surrogate. Toluene-d8 4.88 5.00 97.6 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.39 5.00 108 78-124 <br /> Matrix Spike Dup(0110434-MSD1) - Source: POI 1118-06 Prepared&Analyzed: 11/16/00 _ - <br /> Benzene 105 10.0 ugh 100 11.8 93.2 80-119 4.65 20 <br /> Methyl tent-butyl ether 92.1 10.0 100 ND 92.1 79-118 7.92 20 <br /> Toluene 258 10.0 100 163 95.0 86-115 0.772 20_ <br /> Surrogate Dibromofluoromethane 4.60 5.00 92.0 88-118 <br /> Surrogate: 1,2-Dichloroethane-d4 4.30 5.00 86.0 81-130 <br /> Surrogate: Toluene-d8 4.97 5.00 99.4 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.40 5.00 108 78-124 <br /> equoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 8 of 9 <br />