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w r v r+ <br /> h <br /> Lancaster Laboratories <br /> Where qualltyls a science <br /> Page 5 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 828908 <br /> Reported 11/13/02 at 01 47 PM <br /> Sample Matrix Quality Control <br /> NS MSD MS/MSD RPD RXG DU8 DUP Dnp <br /> RPD <br /> Analydig N %REC %REC Limits RPD MAX Cone C_onc RPD <br /> m+p-Xylene 113 112 82-130 1 30 <br /> o-Xylene 106 106 82-130 0 30 <br /> Styrene 32* 39* 67-137 19 30 <br /> Bromoform 91 88 59-122 3 30 <br /> Isopropylbenzene 109 107 81-130 2 30 <br /> 1,1,2,2-Tetrachloroethane 104 103 69-121 1 30 <br /> Bromobenzene 105 106 83-121 1 30 <br /> 1,2,3-Trichloropropane 105 106 73-125 1 30 <br /> n-Propylbenzene 109 110 78-131 1 30 <br /> 2-Chlorotoluene 97 99 77-126 3 30 <br /> 1,3,5-Trimethylbenzene 106 108 77-137 2 30 <br /> 4-Chlorotoluene 99 100 81-123 1 30 <br /> tert-Butylbenzene 97 98 76-128 0 30 <br /> 1,2,4-Trimethylbenzene 108 109 75-132 1 30 <br /> sec-Butylbenzene 105 107 72-134 2 30 <br /> p-Isopropyltoluene 104 105 72-135 1 30 <br /> 1,3-Dichlorobenzene 108 108 82-128 0 30 <br /> 1,4-Dichlorobenzene 104 103 81-122 0 30 <br /> n-Butylbenzene 106 107 60-140 1 30 <br /> 1,2-Dichlorobenzene 103 102 82-117 0 30 <br /> 1,2-Dibromo-3-chloropropane 98 95 54-130 3 30 <br /> 1,2,4-Trichlorobenzene 91 93 66-121 2 30 <br /> • Hexachlorobutadiene 97 99 44-134 2 30 <br /> Naphthalene 96 97 59-124 1 30 <br /> 1,2,3-Trichlorobenzene 96 98 66-121 2 30 <br /> Acetone 71 70 49-143 2 30 <br /> Carbon Disulfide 113 119 57-164 5 30 <br /> 2-Butanone 95 94 47-143 1 30 <br /> trans-1,3-Dichloropropene 99 98 70-120 2 30 <br /> cis-1,3-Dichloropropene 92 94 69-118 2 30 <br /> 4-Methyl-2-pentanone 106 106 59-132 1 30 <br /> 2-Hexanone 108 106 47-146 1 30 <br /> Xylene (Total) 111 110 82-130 1 30 <br /> 2-Chloroethyl vinyl Ether 0* 0* 1-133 0 30 <br /> Freon 113 110 115 81-155 4 30 <br /> Batch number N023082AB Sample number(s) 3930713-3930714 <br /> Methyl t-butyl ether 97 99 69-134 2 30 <br /> Benzene 110 111 78-134 1 30 <br /> Toluene 111 111 83-127 0 30 <br /> Ethylbenzene 112 110 82-134 2 30 <br /> Xylene (Total) 111 110 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH - DRO CA LUFT (Waters) <br /> Batch number 023050007A <br /> orthoterphenyl <br /> 3930710 100 <br /> 3930712 91 <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 /> Lancaster Laboratories,Inc <br /> M E M B E R 2425 New Holland Pike <br /> ® PO Box 12425 <br /> Lancaster PA 176052425 <br /> 717-656-2300 Fax 71717656 2681 2216 Rev 9111100 <br />