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. F <br />Lancaster <br />Laboratories <br />Quality Control Summary <br />Client Name: ChevronTexaco <br />Reported: 11/07/03 at 10:50 AM Group Number: 872526 <br />Laboratory Compliance Quality Control <br />Analysis Name <br />Blank Blank Report LCS LCSD LCS/LCSD <br />Result MDL Units %REC <br />%REC Limits <br />Analysis Name <br />Batch number: 03302A55A <br />TPH-GRO - Waters <br />Batch number: 033070007A <br />Methanol (by Direct Injection) <br />Batch number: P033021AA <br />Ethanol <br />*, Methyl Tertiary Butyl Ether <br />�r `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 />Batch number: P033023AA <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 />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Batch number: P033031AA <br />Ethanol <br />Methyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD <br />%REC 06REC Limits RPD MAX <br />Sample number(s): 4152395-4152399 <br />121 63-154 <br />Sample number(s): 4152395-4152399 <br />104 104 73-117 0 20 <br />Sample number(s): 4152395 <br />86 <br />82 <br />38-149 <br />4 <br />30 <br />98 <br />98 <br />69-134 <br />0 <br />30 <br />98 <br />100 <br />75-130 <br />3 <br />30 <br />93 <br />94 <br />78-119 <br />1 <br />30 <br />99 <br />99 <br />77-117 <br />0 <br />30 <br />106 <br />107 <br />44-150 <br />1 <br />30 <br />141* <br />55* <br />83-128 <br />19 <br />30 <br />94 <br />97 <br />73-136 <br />3 <br />30 <br />103 <br />102 <br />83-127 <br />1 <br />30 <br />98 <br />98 <br />78-120 <br />1 <br />30 <br />108 <br />107 <br />62-129 <br />1 <br />30 <br />105 <br />105 <br />82-130 <br />0 <br />30 <br />Sample <br />number(s): 4152396-4152398 <br />88 <br />85 <br />38-149 <br />3 <br />30 <br />97 <br />95 <br />69-134 <br />1 <br />30 <br />96 <br />95 <br />75-1.30 <br />2 <br />30 <br />93 <br />92 <br />78-119 <br />2 <br />30 <br />98 <br />96 <br />77-117 <br />3 <br />30 <br />104 <br />101 <br />44-150 <br />3 <br />30 <br />102 <br />102 <br />83-128 <br />0 <br />30 <br />96 <br />94 <br />73-136 <br />2 <br />30 <br />103 <br />101 <br />83-127 <br />2 <br />30 <br />96 <br />95 <br />78-120 <br />1 <br />30 <br />103 <br />102 <br />82-129 <br />1 <br />30 <br />104 <br />101 <br />82-130 <br />2 <br />30 <br />Sample <br />number(s): 4152399 <br />82 <br />82 <br />38-149 <br />1 <br />30 <br />96 <br />96 <br />69-134 <br />0 <br />30 <br />94 <br />95 <br />75-130 <br />1 <br />30 <br />92 <br />92 <br />78-119 <br />0 <br />30 <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ. <br />;2) The background result was more than four times the spike added. <br />Lancaster Laboratories, Inc. <br />[� M E M B it; R 2425 New Holland Pike <br />PO Box 12425 <br />.. <br />Lancaster, PA 17605-2425 <br />717-655J4lln Far- 717.656-2681 <br />BKG DUP <br />COnc Cori <br />Page 2 of <br />RPD RPD Max <br />DUP Dup <br />RPD <br />RPD Max <br />