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i) a 0 <br /> Lancaster <br /> Laboratories Analysis Report <br /> in Iq4IV2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717-656 2300 Fax 717-656.2661•www lancasteriabs com <br /> Page 5 of 7 <br /> Quality Control Summary <br /> Client: Name ChevronTexaCO Group Number 861384 <br /> Reported 08/11/03 at 11 35 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limxta RPD MAX Conc Conc RPB Max _ <br /> 1,1,2-Trichloroethane 101 99 77-125 2 30 <br /> Tetrachloroethene 109 110 75-143 1 30 <br /> 1,3-Dichloropropane 100 100 82-121 0 30 <br /> Dibromochloromethane 96 97 73-119 1 30 <br /> 1,2-Dibromoethane 99 99 78-120 0 30 <br /> Chlorobenzene 105 104 83-120 1 30 <br /> 1,1,1,2-Tetrachloroethane 102 102 83-119 0 30 <br /> Ethylbenzene 107 107 82-134 0 <br /> m+p-Xylene 109 109 82-130 0 <br /> o-Xylene 107 105 82-130 2 30 <br /> Styrene 89 87 67-137 2 30 <br /> Bromoform 93 89 64-119 4 30 <br /> Isopropylbenzene 108 106 81-130 2 30 <br /> 1,1,2,2-Tetrachloroethane 93 92 69-121 1 30 <br /> Bromobenzene 98 101 83-121 3 30 <br /> 1,2,3-Trichloropropane 98 96 73-125 1 30 <br /> n-Propylbenzene 102 103 78-131 1 30 <br /> 2-Chlorotoluene 98 101 78-121 3 30 <br /> 1,3,5-Trimethylbenzene 100 102 '74-130 1 30 <br /> 4-Chlorotoluene 98 102 81-123 4 30 <br /> 0s'ert-Butylbenzene 100 101 76-128 1 30 <br /> ,2,4-Trimethylbenzene 103 104 75-132 1 30 <br /> ec-Butylbenzene 101 103 72-134 2 30 <br /> p-Isopropyltoluene 102 104 72-135 2 30 <br /> 1,3-Dichlorobenzene 103 103 82-128 1 30 <br /> 1,4-Dichlorobenzene 99 101 81-122 2 30 <br /> n-Butylbenzene 101 101 60-140 1 30 <br /> 1 2-Dichlorobenzene 97 98 82-117 1 30 <br /> 1,2-Dibromo-3-chloropropane 88 85 54-130 3 30 <br /> 1,2,4-Trichlorobenzene 68 92 66-121 4 30 <br /> Hexachlorobutadiene 97 101 52-132 4 30 <br /> Naphthalene 85 87 59-124 2 30 <br /> 1,2,3-Trichlorobenzene 91 91 66-121 0 30 <br /> Acetone 82 80 26-148 1 1 <br /> Carbon Disulfide 126 129 78-150 2 <br /> 2-Butanone 87 87 42-140 0 1C <br /> trans-1,3-Dichloropropene 98 98 75-117 1 30 <br /> cis-1 3-Dichloropropene 98 98 76-117 0 30 <br /> 4-Methyl-2-pentanone 98 95 59-132 3 30 <br /> 2-Hexanone 92 89 53-134 3 30 <br /> 2-Chloroethyl vinyl Ether 0* 0* 1-172 0 30 <br /> Freon 113 140 141 81-155 1 30 <br /> Batch number P032202AA Sample number(s) 4092147,4092150-4092152 <br /> Methyl Tertiary Butyl Ether 112 114 69-134 2 30 <br /> Benzene 121 120 83-128 1 30 <br /> Toluene 114 113 83-127 1 30 <br /> Ethylbenzene 113 112 82-134 0 30 <br /> Xylene (Total) 114 112 82-130 2 30 <br /> Surrogate Quality Control <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 />