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F Lancaster Laboratories Analysis Report Y p 2425 New Holland Pike, PO Box 12425. Lanoasier. PA 17605-2425 •717-656-2300 Fax: 717-656-2681 • www,lancaSteriabs.com Page 2 of 3 _ Quality Control Summary Client Name: ChevronTexaco Reported: 09/02/03 at 04:03 PM Group Number; 864230 Sample Matrix Quality Control MS MSD MS/MSD RPD BKG DUP DUP Dup Analysis Name %REC %REC Limite RPD MAX ConeRP D Cone RPD t -Amyl methyl ether 104 105 77-117 t to t -Butyl alcohol 89 88 39-155 1 30 Benzene 108 107 83-128 1 30 1,2-Dichloroethane 110 100 73-136 9 30 Toluene 97 99 83-127 2 30 1,2-Dibromoetharne 94 95 78-120 1 30 Ethylbenzene 103 91 62-134 13 30 Xylene (Total) 105 93 82-130 12 30 Batch number: N032382AA Sample number(s). 4107519-4107521 Ethanol 81 87 34-163 7 30 Methyl Tertiary Butyl Ether 105 105 69-134 0 30 di -Isopropyl ether 108 108 75-130 0 30 Ethyl t -butyl ether los 104 73-123 1 30 t -Amyl methyl ether 99 101 77-117 2 30 t -Butyl alcohol 82 82 39-155 0 30 Benzene 11.2 112 83-128 0 30 1, 2 -Dichloroe thane 99 100 73-136 1 30 E Toluene 106 105 83-127 1 30 k , 1,2-Dibromoethane 94 95 78-120 1 30 Ethylbenzene 108 106 82-134 2 30 `.Xylene (Total) 109 109 82-130 0 30 _ Surrogate Quality Control Analysis Name: TPH-GRO - Waters Batch number: 03237A07C Trifluorotoluene-F 4107519 85 Blank 84 LCs 104 LCSD 106 MS 110 L m ts: 57-146 Analysis Name: TPH-GRO - Waters Batch number: 03237ASSA Trifluorotoluene-F 4107520 91 -. 4107521 110 4107522 93 Blank 94 LCS 97 LCSD 96 L mits: 57-146 Analysis Name: Methanol and Ethanol Batch number: 032410017A *- Outside of specification (1) The result for one or both determinations was less than five times the LOQ. .(2) The background result was more than four times the spike added.