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819 Striker Avenue.Suite 8 <br /> Sequoia Saaamento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> wv,+wsequoi .com <br /> EMCON/IT-Sacramento Project: Foothill Landfill,San Joaquin County <br /> 1433 N.Market Blvd. Project Number: 791289 Reported: <br /> Sacramento CA,95834 Project Manager: Steve Giacomini 05/17/01 12:12 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-Petaluma <br /> ' Reporting Spike Source %REC RPD <br /> Analyte Result MDL Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1050142-EPA 5030 waters <br /> Blank(1050142-BLK1) Prepared&Analyzed:05/07/01 <br /> 1,3,5-Trimethylbenzene ND 0.110 0.500 ug/I <br /> 1,2,4-Trimethylbenzene ND 0.110 0.500 <br /> Vinyl acetate ND 1.64 5.00 <br /> Vinyl chloride ND 0.0600 0.500 <br /> m,p-Xylene NO 0.210 0.500 " <br /> o-Xylene ND 0.0700 0.500 " <br /> Surrogate:Dibromofluoromethane 5.53 5.00 111 88-118 <br /> Surrogate:1,2-Dichloroethaned4 5.61 5.00 112 81-130 <br /> Surrogate:Toluene-d8 5.62 5.00 112 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.30 5.00 106 78-124 <br /> LCS(1050142-BS1) Prepared&Analyzed:05/07/01 <br /> Benzene 5.25 0.0500 0.500 ug/1 5.00 105 80-119 <br /> Chlorobenzene 5.58 0.0700 0.500 5.00 112 86-117 <br /> 1,1-Dichloroethene 5.70 0.0600 0.500 5.00 114 74-114 <br /> Toluene 5.57 0.0700 0.500 11 5.00 111 86-115 <br /> Trichloroethene 5.33 0.0600 0.500 5.00 107 84-120 <br /> Surrogate:Dibromofluoromethane 5.81 5.00 116 88-118 <br /> ' Surrogate:1,2-Dichloroethaned4 5.89 II 5.00 118 81-130 <br /> Surrogate:Toluene-d8 5.56 5.00 111 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.14 5.00 103 78-124 <br /> Matrix Spike(1050142-MS1) Source:P105044-01 Prepared&Analyzed:05/07/01 <br /> Benzene 459 1.25 12.5 ug/t 125 376 66.4 80-119 Q-LLM <br /> Chlorobenzene 130 1.75 12.5 125 ND 104 86-117 <br /> ' <br /> 1,1-Dichloroethene 140 1.50 12.5 11 125 ND 112 74-114 <br /> Toluene 136 1.75 12.5 125 ND 109 86-115 <br /> Trichloroethene 126 1.50 12.5 125 ND 101 84-120 <br /> Surrogate:Dibromofluoromethane 5.79 5.00 116 88-118 <br /> Surrogate:1,2-Dichloroethaned4 5.93 5.00 119 81-130 <br /> Surrogate:Toluene-d8 5.80 5.00 116 84-115 S-LLtV1 <br /> Surrogate:4-Bromofluorobenzene 5.31 5.00 106 78-124 <br /> Sequoia Analytical-Sacrament <br /> Q yt O 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 18 of 26 <br />