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1 <br /> IT Corp Project 7-Eleven#21756 <br /> 4005 Port Chicago Hwy Project Number 781723 Reported <br /> Concord CA,94520 Protect Manager Shelby Lathrop 4/9/02 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> ' SunStar Laboratories,Inc. <br /> Reporting Spike Source %REC RPD <br /> lAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> ' Batch 2040901 -EPA 5030 Soil MS <br /> Blank(2040901-SLK]) Prepared&Analyzed 04/08/02 <br /> ' Ethyl tert-butyl ether ND 20 ug/kg <br /> Hexachlorobutadiene ND 50 <br /> Isopropylbenzene ND 5 0 " <br /> p-Isopropyltoluene ND 50 " <br /> Methylene chloride ND 50 <br /> Methyl tert-butyl ether ND 20 " <br /> Naphthalene ND 50 " <br /> ' n Propylbenzene ND 50 <br /> Styrene ND 5 0 <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 /> Tetrachtoroethene ND 5 0 " <br /> Toluene ND 5 0 <br /> 1,2,3-Tnchlorobenzene ND 5 0 <br /> 1,2,4-Trichlombenzene ND 5 0 " <br /> ' 1,1,2-Tnehloroethane ND 50 <br /> 1,1,1-Tnchloroethane ND 50 <br /> Trichloroethene ND 5 0 " <br /> ' Trichlorofluoromethane ND 5 0 <br /> 1,2,3-Tnchloropropane ND 5 0 <br /> 1,3,5-Tnmethylbenzene ND 5 0 " <br /> 1,2,4-Trimethylbenzene ND -50 <br /> Vinyl chloride ND 50 <br /> m,p-Xylene ND 5 0 <br /> o-Xylene ND 5 0 " <br /> ' Surrogate Toluene-d8 963 " 100 963 81-117 <br /> Surrogate 4-Bromofluorobenzene 962 100 962 74-121 <br /> Surrogate Dibromofuoromethane 103 100 103 80-110 <br /> SunStar Laboratories, Inc The results to 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 /> ' Leah Beauchame,Project Manager Page 10 of 13 <br />