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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma, 954 <br /> (7o7)7979 z-l-1ass <br /> FAX(707)792-0342 <br /> Analytical <br /> www.sequoialabs.com <br /> Cambria Environmental-Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 340 E.Main St.,Ripon.Ca. Reported: <br /> Emeryville CA,94608 Project Manager: Owen Ratehye 01/11/01 14:23 <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 0120275-EPA 5030 waters <br /> GCS(0120275-BS1) Prepared&Analyzed: 12/12/00 <br /> 3enzene 4.84 0.500 USA 5.00 96.8 80-119 <br /> vtethyl tert-butyl ether 4.77 0.500 5.00 95.4 79-118 <br /> toluene 4.94 0.500 5.00 98.8 86-115 <br /> surrogate:Dibromofluoromethane 4.46 5.00 89.2 88-118 <br /> iurrogaie: l,2-Dichloroethane-d4 4.40 5.00 88.0 81-130 <br /> surrogate:Toluene-d8 4.94 5.00 98.8 84-115 <br /> surrogate:4-Bromofluorobenzene 5.03 5.00 101 78-124 <br /> .CS(0120275-BS2) Prepared&Analyzed: 12/13/00 <br /> Whyzene 4.88 0.500 ug/l 5.00 97.6 80-119 <br /> J <br /> tert-butyl ether 4.78 0.500 5.00 95.6 79-118 <br /> Toluene 4.78 0.500 5.00 95.6 86-115 <br /> surrogate:Dibromofluoromethane 4.89 5.00 97.8 88-118 <br /> iurrcgate:1,2-Dichloroethane d4 5.11 5.00 102 81-130 <br /> surrogate:Toluene-d8 5.11 5.00 102 84-115 <br /> 3urrogate:4-Bromofluorobenzene 5.19 5.00 104 78-124 <br /> Matrix Spike(0120275-MS1) Source: P012173-02 Prepared: 12/12/00 Analyzed: 12/13/00 <br /> 3enzene 4.87 0.500 ugll 5.00 ND 97.4 80-119 <br /> Aethyl tett-butyl ether 4.83 0.500 5.00 ND 96.6 79-118 <br /> Toluene 4.96 0.500 5.00 ND 99.2 86-115 <br /> surrogate:Dibromofluoromelhane 4.55 5.00 91.0 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 4.49 5.00 89.8 81-130 <br /> 4urrogale: Toluene-d8 5.10 5.00 102 84-115 <br /> iurrogate:4-Bromofluorobenzene 5.24 5.00 105 78-124 <br /> Watrix Spike Dup(0120275-MSD1) Source: P012173-02 Prepared: 12/12/00 Analyzed: 12/13/00 <br /> 3enzene 4.87 0.500 ug/l 5.00 ND 97.4 80-119 0 20 <br /> v[ethyl tert-butyl ether 4.84 0.500 5.00 ND 96.8 79-118 0.207 20 <br /> toluene 5.01 0.500 5.00 ND 100 86-115 1.00 20 <br /> surrogate:Dibromofluoromethane 4.58 5.00 91.6 88-118 <br /> wrrogate:l,2-Dichloroethane-d4 4.59 5.00 91.8 81-130 <br /> surrogate:Toluene-d8 4.99 5.00 99.8 84-115 <br /> 3urrogate:4-Bromofluorobenzene 5.16 5.00 103 78-124 <br /> 0 <br /> Sequoia 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 />