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Analysis Report <br /> Lancaster <br /> Laboratories <br /> Page 3 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 870430 <br /> Reported 10/28/03 at 04 07 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 Cone Cone RPD Max <br /> 1,2-Dibromoethane 87 89 61-125 3 30 <br /> Ethylbenzene 91 92 50-136 3 30 <br /> Xylene (Total) 92 93 47-139 3 30 <br /> Batch number Q032532AB Sample number(s) 4141624 <br /> Methyl Tertiary Butyl Ether 69 68 57-136 1 30 <br /> di-Isopropyl ether 103 100 55-132 2 30 <br /> Ethyl t-butyl ether 96 94 5B-127 3 30 <br /> t-Amyl methyl ether 94 93 58-126 2 30 <br /> t-Butyl alcohol 97 97 20-174 0 30 <br /> Benzene (2) (2) 52-141 23 30 <br /> 1,2-Dichloroethane 94 92 57-137 3 30 <br /> Toluene 63 83 53-137 1 30 <br /> 1,2-Dibromoethane 93 93 61-125 0 30 <br /> Ethylbenzene 80 80 50-136 0 30 <br /> Xylene (Total) 52 49 47-139 4 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH - DRO CA LUFT (Soils) <br /> Batch number 032522808A <br /> orthoterphenyl <br /> 4141621 72 <br /> 4141622 73 <br /> 4141623 72 <br /> 4141624 80 <br /> 4141625 58 <br /> 4141626 59 <br /> Blank 82 <br /> LCS 80 <br /> MS 66 <br /> MSD 51* <br /> Limits 54-113 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 032522812A <br /> Acetone <br /> 4141621 91 <br /> 4141622 84 <br /> 4141623 94 <br /> 4141624 89 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> 102) The background result was more than four times the spike added <br /> Lancaster Laboratories Inc <br /> M E M B E 1`t 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster 17605 2425 <br /> 717 656 74p000 Fax 717 696 7681 ?216 Rav 4!14/03 <br />