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Lancaster <br />Laboratories <br />Analysis Report <br />ii 2425 New Hotiand Pike, PO Box 12425, Lancasler, PA 17605-2425 •717-656-2300 Fax; 717-656.2681 • www.lancasteriabs.corn <br />Quality Control Summary <br />Client Name: ChevronTexaco Group Number: 850519 <br />Reported: 05/16/03 at 09:54 AM <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BRG DUP <br />Analysis -Name <br />t -Butyl alcohol <br />Benzene <br />- 1,2-Dichloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />:i Xylene (Total) <br />F_==J <br />Batch number: P031282AA <br />Ethanol <br />F_- Methyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />F; Ethyl t -butyl ether <br />t -Amyl methyl ether <br />t -Butyl alcohol <br />Benzene <br />�.' 1,2-Dichloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />=ne (Total) <br />%REC <br />%REC <br />Limits <br />RPD <br />MAX Conc Conc <br />103 <br />100 <br />39-155 <br />3 <br />30 <br />94 <br />87 <br />83-128 <br />6 <br />30 <br />110 <br />107 <br />73-136 <br />3 <br />30 <br />101 <br />96 <br />83-127 <br />4 <br />30 <br />95 <br />93 <br />78-120 <br />2 <br />30 <br />106 <br />85 <br />82-134 <br />19 <br />30 <br />107 <br />101 <br />82-130 <br />5 <br />30 <br />Sample <br />number(s): 4037454-4037468 <br />95 <br />92 <br />34-163 <br />3 <br />30 <br />92 <br />99 <br />69-134 <br />7 <br />30 <br />100 <br />109 <br />75-130 <br />9 <br />30 <br />95 <br />103 <br />73-123 <br />7 <br />30 <br />93 <br />99 <br />77-117 <br />6 <br />30 <br />97 <br />103 <br />39-155 <br />6 <br />30 <br />100 <br />103 <br />83-128 <br />4 <br />30 <br />106 <br />116 <br />73-136 <br />7 <br />30 <br />97 <br />103 <br />83-127 <br />7 <br />30 <br />94 <br />100 <br />78-120 <br />6 <br />30 <br />100 <br />105 <br />82-134 <br />5 <br />30 <br />101 <br />106 <br />82-130 <br />5 <br />30 <br />Surrogate Quality Control <br />`1 Analysis Name: Methanol and Ethanol <br />Batch number: 031250016A <br />Acetone <br />4037443 102 <br />4037444 101 <br />4037445 101 <br />4037446 102 <br />4037447 102 <br />4037448 98 <br />4037449 101 <br />4037450 101 <br />4037451 98 <br />ci 4037452 100 <br />4037453 99 <br />4037454 97 <br />4,037455 99 <br />4037456 99 <br />4037457 100 <br />L`_ 4037458 101 <br />E==:1 4037459 100 <br />4037460 97 <br />4037461 102 <br />4037462 101 <br />Blank 101 <br />hCS 101 <br />MS 101 <br />MSD 100 <br />Outside of specification <br />The result for one or both determinations was less than five times the LOQ. <br />lS The background result was more than four times the spike added. <br />Page 3 of 6 <br />DUP DUP <br />RPD <br />RPD Meuc- <br />