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Geofon,Inc Project: City of Stockton <br /> 65 Quinta Ct#D Project Ntunber: [none) Reported: <br /> Sacramento CA,95823 Project Manager: D.Marks 10/28/03 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> SunStar Laboratories,Inc. <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3102303-EPA 5030 Soil MS <br /> Blank(3102303-BLKI) Prepared&Analyzed: 10/23/03 <br /> Naphthalene ND 2.0 ug/kg <br /> n-Propylbemene ND 2.0 " <br /> Styrene ND 2.0 " <br /> 1,1,2,2-Tetrachloroethane ND 2.0 " <br /> 1,1,1,2-Tetrachlorcethane ND 2.0 " <br /> Tanachloroethene ND 2.0 " <br /> 1,2,3-Trichlorobenzene ND 2.0 " <br /> 1,2,4-Tricblorobeazene ND 2.0 " <br /> 1,1,2-Trichloroethane ND 2.0 " <br /> 1,1,1-Trichloroethane ND 2.0 " <br /> Trichloroethene ND 2.0 " <br /> Trichlomfluoromethane ND 2.0 " <br /> 1,2,3-Trichloropropane ND 2.0 " <br /> 1,3,5-Trimethylbenzene ND 2.0 " <br /> 1,2,4-Trimethylbenzene ND 2.0 " <br /> Vinyl chloride ND 2.0 " <br /> Benzene ND 2.0 " <br /> Toluene ND 2.0 " <br /> Ethylbenzene ND 2.0 " <br /> m,p-Xylene ND 4.0 " <br /> o-Xylene ND 2.0 " <br /> Tertamyl methyl ether ND 5.0 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 5.0 " <br /> Ethyl Cert-butyl ether ND 5.0 " <br /> Methyl ten-butyl ether ND 5.0 " <br /> Surrogate:Toluene-08 94.6 " 100 94.6 81-117 <br /> Surrogate:4-BromoJluorobenzene 86.1 " 100 86.1 74-121 <br /> Surrogaler DibromoJluoromethane 99.7 100 99.7 81-115 <br /> SunStar Laboratories,Inc. The results in this report apply to the samples analysed in accordame with the chain of- <br /> curtody document.This analytical report must be reproduced in its entirety. <br /> Y <br /> John Shepler For Ben Beauchaine,Laboratory Supervisor Page 20 of 23 <br />