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L71 <br />Lancaster <br />. Laboratories REPRINT <br />Page 2 of 4 <br />Quality Control Summary <br />Client Name ChevronTexaco <br />Reported 01/02/03 at 03 52 PM <br />Analysis Name <br />Batch number 023460023A <br />Methanol (by Direct Infection) <br />Batch. number N023441AA <br />Ethanol <br />Methyl t -butyl ether <br />d3 -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />t -Butyl alcohol <br />Benzene <br />1,2-Dichloroethane <br />Toluene <br />1,2-Drbromoethane <br />Ethylbenzene <br />lalene (Total) <br />tch number N021442AA <br />Ethanol <br />Methyl t -butyl ether <br />di -Isopropyl ether <br />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 />Xylene (Total) <br />Analysis Name TPH-GRO - Waters <br />Batch number 02343A16A <br />Trifluorotoluene-F <br />3955354 110 <br />3955355 110 <br />3955356 107 <br />Group Number 833534 <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD 8KG DUP DUP Dup <br />RPD <br />%REC %REC Limits RPD MAX Conc Conc RPD Max <br />Sample number(s) 3955354-3955357 <br />88 85 69-127 4 20 <br />Sample number(s) 3955354 <br />91 91 34-163 0 30 <br />92 93 69-134 1 30 <br />94 95 68-133 1 30 <br />104 106 73-123 1 30 <br />98 99 69-118 2 30 <br />112 113 51-148 1 30 <br />111 111 78-134 0 30 <br />94 94 73-136 0 30 <br />109 107 83-127 2 30 <br />105 104 78-120 1 30 <br />106 106 82-134 1 30 <br />109 108 82-130 1 30 <br />Sample number(s) 3955355-3955358 <br />83 78 34-163 5 30 <br />92 89 69--134 3 30 <br />89 87 68--133 3 30 <br />102 100 73-123 2 30 <br />95 93 69-118 2 30 <br />104 101 51-148 2 30 <br />108 106 78-134 3 30 <br />96 94 73-136 2 30 <br />109 106 83-127 3 30 <br />105 102 7B-120 3 30 <br />107 104 82-134 3 30 <br />108 105 82-130 3 30 <br />Surrogate Qual:Lty Control <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ <br />aThe background result was more than four times the spike added <br />Lancaster Laboratories Inc <br />M E M B lE R 2425 New Holland Pike <br />®PO Box 12425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 fax 717-656-2681 <br />2216 Rev 1012!02 <br />