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Lancaster <br /> Laboratories i <br /> Page 4 of 6 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 841528 <br /> Reported 02/27/03 at 06 53 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %RBC %RBC Limits RPD MAX Conc Conc RPD Max <br /> Methylene Chloride 111 111 80-126 0 30 <br /> trans-1,2-Dachloroethene 112 112 82-133 0 30 <br /> 1,1-Dichloroethane 112 111 79-135 1 30 <br /> cis-1,2-Dichloroethene 105 106 83-126 1 30 <br /> Chloroform 107 107 77-133 0 30 <br /> 1,1,1-Trichloroethane 110 111 82-135 1 30 <br /> Carbon Tetrachloride 106 108 73-144 2 30 <br /> Benzene 111 110 83-128 0 30 <br /> 1,2-Dichloroethane 107 106 73-136 1 30 <br /> Trichloroethene 106 105 75-135 1 30 <br /> 1,2-Dichloropropane 105 106 81-121 1 30 <br /> Bromodichloromethane 103 102 81-127 1 30 <br /> Toluene 107 108 83-127 0 30 <br /> 1,1,2-Trichloroethane 105 104 77-125 1 30 <br /> Tetrachloroethene 112 109 75-143 3 30 <br /> Dibromochloromethane 97 98 73-119 1 30 <br /> Chlorobenzene 106 105 83-120 1 30 <br /> Ethylbenzene 110 109 82-134 1 30 <br /> m+p-Xylene 109 108 82-130 1 30 <br /> o-Xylene 103 104 82-130 1 30 <br /> Bromoform 88 89 64-119 1 30 . <br /> 1,1 2 2-Tetrachloroethane 103 103 69-121 0 30 <br /> 1,3-Dichlorobenzene 106 105 82-128 0 30 <br /> 1,4-Dichlorobenzene 104 102 81-122 1 30 <br /> 1,2-Dichlorobenzene 105 103 82-117 1 30 <br /> trans-1,3-Dachloropropene 99 99 75-117 0 30 <br /> —cis-1,3=Dichloropropene____97_ 98__76-117___0_ _30 <br /> Freon 113 122 118 81-155 3 30 <br /> Batch number P030521AA Sample number(s) 3996001,3996004-3996005 <br /> Methyl Tertiary Butyl Ether (2) (2) 69-134 4 30 <br /> Benzene 112 114 83-128 1 30 <br /> Toluene 107 105 83-127 1 30 <br /> Ethylbenzene 109 107 82-134 2 30 <br /> Xylene (Total) 109 108 82-130 0 30 <br /> Batch number P030531AA Sample number(s) 3996005 <br /> Benzene 108 107 83-128 1 30 <br /> Surrogate Quality Control <br /> Analysas Name TPH-GRO - Waters <br /> Batch number 03045A07C <br /> Trifluorotoluene-F <br /> 3996001 89 <br /> Blank 94 <br /> LCS 119 <br /> LCSD 117 <br /> MS 125 <br /> *- Outside of specification <br /> (1) The result for one or both determinations was less than five tunes the LOQ • <br /> (2) The background result was more than four times the spike added <br /> Lancaster Laboratories Inc <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster PA 17605 2425 <br /> 717-656 2300 Fax 717 656-2681 2216 RPS 1017/02 <br />