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Lancaster <br /> Laboratories Analysis Deport <br /> 2425 New Holland Pike PQ Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 717-656"2681•Www Iancasterlabs Com <br /> Page 5 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 862273 <br /> Reported 08/27/03 at 10 23 AM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD, RPD BKG DUP DVP Dup <br /> RPA <br /> Analysis Name kRECREC LimitS RPD MAX Conc Cone RPD Max_ <br /> TRPH 418 1 0 71 0 72 2 (1) 34 <br /> 3 <br /> Batch number N032211AB Sample number(s) 4096277 <br /> Methyl Tertiary Butyl Ether 112 110 69-134 2 30 <br /> Chloromethane 117 126 66-142 8 30 <br /> Vinyl Chloride 123 134 64-148 9 30 <br /> Bromomethane 125 126 48-132 1 30 <br /> Chloroethane 125 128 58-136 2 30 <br /> Trichlorofluoromethane 152 151 64-154 1 30 <br /> 1,1-Dichloroethene 126 128 78-146 2 30 <br /> Methylene Chloride 110 111 80-126 1 30 <br /> trans-1,2-Dichloroethene 115 115 82-133 0 30 <br /> 1,1-Dichloroethane 120 118 79-135 2 30 <br /> cis-1,2-Dichloroethene 104 104 83-126 0 30 <br /> Chloroform 113 113 77-133 0 30 <br /> 1,1,1-Trichloroethane 116 117 82-135 1 30 <br /> Carbon Tetrachloride 118 116 73-144 2 30 <br /> Benzene 108 107 83-128 1 30 <br /> 1,2-Dzchloroethane 119 114 73-136 4 30 <br /> Trichloroethene 110 110 75-135 0 30 <br /> 1,2-Dichloropropane 99 99 81-121 0 30 <br /> Bromodichloromethane 107 107 81-127 0 30 <br /> Toluene 104 104 83-127 0 30 <br /> 1,1,2-Trichloroethane 101 99 77-125 2 30 <br /> Tetrachloroethene 109 110 75-143 1 30 <br /> Dibromochloromethane 96 97 73-119 1 30 <br /> Chlorobenzene 105 104 83-120 1 30 <br /> Ethylbenzene 107 107 62-134 0 30 <br /> m+p-Xylene 109 109 82-130 0 30 <br /> o-xylene 107 105 82-130 2 30 <br /> Bromoform 93 89 64-119 4 30 <br /> 1,1,2,2-Tetrachloroethane 93 92 69-121 1 30 <br /> 1,3-Dichlorobenzene 103 103 82-128 1 30 <br /> 1,4-Dichlorobenzene 99 101 81-122 2 30 <br /> 1,2-Dichlorobenzene 97 98 82-117 1 30 <br /> trans-1,3-Dichloropropene 98 98 75-117 1 30 <br /> cis-1,3-Dichloropropene 98 98 76-117 0 30 <br /> Freon 113 140 141 81-155 1 30 <br /> Batch number N032282AA Sample number(s) 4096276,4096279-4096280 <br /> Methyl Tertiary Butyl Ether 112 114 69-134 2 30 <br /> Benzene 117 119 83-128 2 30 <br /> Toluene 113 116 63-127 3 30 <br /> Ethylbenzene 122 126 82-134 4 30 <br /> Xylene (Total) 120 125 82-130 4 30 <br /> Batch number _N032281AB ---Sample-number(s) 4096280 <br /> Methyl Tertiary Butyl Ether 112 119 69-134 2 30 <br /> Toluene 113 116 83-127 3 30 <br /> hthylbenzene 1dL ;20 82-13s Y 30 <br /> Xylene (Total) 120 125 82-130 4 30 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br />