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Lan <br />� • o atories <br />I <br />Quality Control Summary <br />Client Name ChevronTexaco Group Number 845781 <br />Reported 04/03/03 at 10 50 AM <br />Analysis Name %REC %REC Limits RPD MAX Conc <br />Batch number 030830003A Sample number(s) 4016357-4016361 <br />Methanol (by Direct In3ection) 96 96 78-116 0 20 <br />'Batch number 030B3Al6A <br />TPH-GRO - Waters <br />'Batch number 03083A51B <br />TPH-GRO - Waters <br />Batch number P030852AA <br />Ethanol <br />Methyl Tertiary 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 />Dibromoethane <br />' lbenzene <br />ens (Total} <br />Sample number(s) 4016357-4016359 <br />108 70-130 <br />Sample number(s) 4016360-4016361 <br />94 70-130 <br />Sample number(s) 4016358-4016361 <br />105 <br />108 <br />34-163 <br />3 <br />30 <br />102 <br />102 <br />69-134 <br />0 <br />30 <br />109 <br />108 <br />75-130 <br />1 <br />30 <br />105 <br />106 <br />73-123 <br />1 <br />30 <br />103 <br />105 <br />77-117 <br />2 <br />30 <br />101 <br />107 <br />39-155 <br />6 <br />30 <br />108 <br />109 <br />83-128 <br />0 <br />30 <br />106 <br />108 <br />73-136 <br />2 <br />30 <br />108 <br />109 <br />83-127 <br />1 <br />30 <br />101 <br />103 <br />78-120 <br />1 <br />30 <br />110 <br />112 <br />82-134 <br />2 <br />30 <br />110 <br />112 <br />82-130 <br />1 <br />30 <br />' Analysis Name Methanol and Ethanol <br />Batch number 030830003A <br />Acetone <br />4016357 <br />4016358 <br />98 <br />101 <br />Surrogate Quality Control <br />Outside of specification <br />The result for one or both determinations was less than five times the LOQ <br />The background result was more than four times the spike added <br />Batch number P030862AA <br />Sample <br />number(s) 4016357 <br />717-656 230000 Fax 71717 656 2681 <br />Ethanol <br />123 <br />112 <br />34-163 <br />9 30 <br />Methyl Tertiary Butyl Ether <br />100 <br />102 <br />69-134 <br />3 30 <br />ds -Isopropyl ether <br />110 <br />112 <br />75-130 <br />2 30 <br />Ethyl t -butyl ether <br />106 <br />108 <br />73-123 <br />2 30 <br />-Amyl methyl ether <br />101 <br />102 <br />77-117 <br />1 30 <br />'t <br />t -Butyl alcohol <br />102 <br />106 <br />39-155 <br />3 30 <br />Benzene <br />109 <br />110 <br />83-128 <br />1 30 <br />1,2-Dichloroethane <br />107 <br />108 <br />73-136 <br />1. 30 <br />107 <br />110 <br />83-127 <br />3 30 <br />'Toluene <br />1,2-Dibromoethane <br />99 <br />100 <br />78-120 <br />1 30 <br />Ethylbenzene <br />109 <br />111 <br />82-134 <br />2 30 <br />Xylene (Total) <br />109 <br />112 <br />82-130 <br />3 30 <br />' Analysis Name Methanol and Ethanol <br />Batch number 030830003A <br />Acetone <br />4016357 <br />4016358 <br />98 <br />101 <br />Surrogate Quality Control <br />Outside of specification <br />The result for one or both determinations was less than five times the LOQ <br />The background result was more than four times the spike added <br />Cone <br />Page 2 of 4 <br />RPA Max <br />2216 Rev 1012102 <br />Lancaster Laboratories, Inc <br />' M E M B E R <br />®PO <br />2425 New Holland Pike <br />Box 12425 <br />Lancaster 17605 <br />717-656 230000 Fax 71717 656 2681 <br />Cone <br />Page 2 of 4 <br />RPA Max <br />2216 Rev 1012102 <br />