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T Corp <br /> Project 7-Eleven#17334 <br /> 005 Port Chicago Hwy Project Number 779950 Reported <br /> Concord CA,94520 Project Manager Kim Metez 04/19/02 15 17 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> SunStar Laboratories, Inc. <br /> Analyte Reporting Spike Source %REC RPD <br /> Result Lunt Umts Level Result %REC Limns RPD Limit Notes <br />' Batch 2040901 -EPA 5030 Sod MS <br /> Blank(2040901-BLKI) Prepared&Analyzed 04/08/02 <br />' Methylene chlorideND 50 ug/kg <br /> Methyl tert-bury]ether ND 20 <br /> Naphthalene ND 50 " <br /> n-Propylbenzene ND 50 „ <br /> Styrene ND 50 <br /> Tert-amyl methyl ether ND 20 " <br /> 1,1,2,2-Tetrachloroethane ND 50 " <br /> Tert-butyl alcohol ND 50 " <br /> 1,1,1,2-Tetrachloroethane ND 5 0 " <br /> Tetrachloroethene ND 50 " <br /> Toluene ND 50 " <br /> 1,2,3-Tnchlorobenzene ND 50 " <br /> 1,2,4-Tnchlorobenzene ND 50 " <br /> 1,1,2-Tnchioroethane ND so " <br /> I,1,1-Tnchloroethane ND 5 0 " <br /> Wloroethene ND 50 <br /> hlorofluoromethane ND 5 0 " <br /> 1,2,3-Tnchloropmpane ND 50 " <br /> 1,3,5-Tnmethylbetizene ND 50 <br /> 1,2,4-Tnmethytbenzene ND 50 <br /> Vinyl chloride ND 50 " <br /> m,p-Xylene ND 50 " <br /> o-Xylene ND 50 Toluene-d8 H <br /> Surrogate 96 3 100 963 81-117 <br /> Surrogate 4-Bromofluorobenzene 962 100 962 74-121 <br /> Surrogate Dibromofluoromethane 103 100 103 80-110 <br /> Matrix Spike(2040901-MSI) Source T200247-01 Prepared&Analyzed 04/08/02 <br /> P y� <br /> Benzene 189 50 ug/kg 250 ND 75 6 75-125 <br /> Chlorobenzenc 210 5 0 250 ND 84 0 75-125 <br /> 1,1-Dichloroethene 215 50 250 ND 860 75-125 <br /> Toluene 198 50 250 ND 79 2 75-125 <br /> Tnchloroethene 213 50 250 ND 85 2 75-125 <br />'Surrogate Toluene-d8 944 100 944 81-117 <br /> Surrogate 4-Bromofluorobenzene 918 100 918 74-121 <br /> Surrogate Dibramofluoromethane 946 100 946 80-120 <br /> tar Laboratories,Inc 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 /> John Shepler,Laboratory Director Page 12 of 17 <br />