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Corp Project 7-Eleven#20632 <br /> 4005 Port Chicago Hwy Project Number T200266 Reported <br /> Concord CA,94520 Project Manager Kim Mctez 04/22/02 10 42 <br /> Q <br /> Volatile Organic Compounds by TEPA Method 82601 -Quality Control <br /> aS-unStar Laboratories, Inc. <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2041504-EPA 5030 Water MS <br /> Matrix Spike(2041504-MS1) Source T200266-06 Prepared&Analyzed 04/12/02 <br /> aBenzene 959 50 ug/l 100 ND 859 75-125 <br /> Chlorobenzene 848 50 100 ND 848 75-125 <br /> 1,1-Dichloroethene 996 50 100 ND 996 75-125 <br /> Toluene 848 50 100 ND 848 75-125 <br /> ITnchloroethene 819 50 100 ND 819 75-125 <br /> Surrogate Toluene-d8 391 400 978 86-115 <br /> Surrogate 4-Bromofluorobenzene 349 400 872 86-115 <br /> QSurrogate Dibromofluoromethane 427 400 107 86-118 <br /> Matrix Spike Dup(2041504-MSD1) Source T200266-06 Prepared&Analyzed 04/12/02 <br /> Benzene 941 50 ugll 100 ND 941 75-125 9 11 20 <br /> 1Chlorobenzene 923 50 100 ND 923 75-125 847 20 <br /> 1,1-Dichloroethene 108 50 100 ND 108 75-125 809 20 <br /> T luene 94 2 50 100 ND 942 75-125 105 20 <br /> aroethene <br /> 882 50 100 ND 88 2 75-125 741 20 <br /> urrogate Toluene-il8 400 400 100 86-115 <br /> Surrogate 4-Bromofluorobenzene 362 400 905 86-115 <br /> Surrogate Dibromofluoromethane 425 400 106 86-118 <br /> J <br /> a <br /> Star Laboratories,Inc The results in this report apply to the samples analyzed in accordance with the chain of <br />{ l custody document This analytical report must be reproduced in its entirety <br /> Jo&n Shepler,Laboratory Director Page 27 of 29 <br />