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,if <br /> Lancaster <br /> Laboratories Analysis Report <br /> 425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717-656 2300 Fax 717 656-2661•www lancasterlabs Corr) <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevroaTexaco Group Number 859692 <br /> Reported 07/30/03 at 03 16 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max_r <br /> TPH-GRO - Waters 114 117 70-130 2 30 <br /> Batch number 03196Ao7C Sample number(s) 4083249,4083253,4083255,4983257 <br /> TPH-GRO - Waters 114 117 70-130 2 30 <br /> Batch number 03202A07A Sample number(s) 4083245-4083248,4083250,4083256 <br /> TPH-GRO - Waters 98 98 70-130 1 30 <br /> Batch number 032050007A Sample number(s) 4083255-4083257 <br /> Methanol (by Direct Infection) 92 92 78-116 0 20 <br /> Batch number N032052AA Sample number(s) 4083248-4083250 <br /> Methyl Tertiary Butyl Ether 100 101 69-134 1 30 <br /> Benzene 117 116 83-128 1 30 <br /> Toluene 114 113 83-127 0 30 <br /> Ethylbenzene 112 111 82-134 1 30 <br /> Xylene (Total) 114 113 82-130 1 30 <br /> Batch number N032061AA Sample number(s) 4083251-4083257 <br /> Ethanol 72 74 34-163 2 30 <br /> Methyl Tertiary Butyl Ether 101 101 69-134 1 30 <br /> di-Isopropyl ether 110 109 75-130 1 30 <br /> Ethyl t-butyl ether 92 92 73-123 0 30 <br /> t-Amyl methyl ether 93 92 77-117 1 30 <br /> t-Butyl alcohol 73 73 39-155 1 30 <br /> Benzene 115 115 83-128 1 30 <br /> 1,2-Dichloroethane 108 109 73-136 1 30 <br /> Toluene 114 113 83-127 1 30 <br /> 1,2-Dibromoethane 93 93 78-120 0 30 <br /> Ethylbenzene 114 113 82-134 1 30 <br /> Xylene (Total) 116 114 82-130 2 30 <br /> Batch number W032051AB Sample number(s) 4083244,4083246-4083247 <br /> Methyl Tertiary Butyl Ether (2) (2) 69-134 1 30 <br /> Benzene 104 103 83-128 0 30 <br /> Toluene 99 97 83-127 2 30 <br /> Ethylbenzene 98 96 82-134 2 30 <br /> Xylene (Total) 97 95 82-130 2 30 <br /> Batch number W032061AB Sample number(s) 4083245 <br /> Methyl Tertiary Butyl Ether 102 103 69-134 1 30 <br /> Benzene 104 104 83-128 0 30 <br /> Toluene 99 97 83-127 2 30 <br /> Ethylbenzene 95 96 82-134 2 30 <br /> Xylene (Total) 95 95 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03196A07B <br /> Trifluorotoluene-F <br /> *-Outside of specification <br /> 01) 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 />