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LancasterRe ort <br /> Laboratories Analysis p <br /> *25 New Hdfland Pike PO Box 12425 Lancaster PA 17605-2425•717-656 2300 Fax 717-656-2681•www iRf1C8St8rlab5 COFl1 <br /> Pagel of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Dumber 892241 <br /> Reported 04/25/04 at 09 55 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LCS/LCSD was performed, unless otherwise specified in the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL units %REC %REC Limits RPD RPD Max <br /> Batch number 04107A08C Sample number(s) 4254917 <br /> TPH-GRO - Waters N D 50 ug/l 113 111 70-130 2 30 <br /> Batch number 0410BA16A Sample number(s) 4254920-4254921,4254924 <br /> TPH-GRO - Waters N D 50 ug/l 113 114 70-130 1 30 <br /> Batch number 0410BA16D Sample number(s) 4254918-4254919,4254922-4254923 <br /> TPH-GRO - Waters N D 50 ug/l 113 114 70-130 1 30 <br /> 4 tch number P041122AA Sample number(s) 4254917-4254924 77-127 <br /> !thyl Tertiary Butyl Ether N D 2 ug/l 99 85-117 <br /> nzene N D 5 ug/1 101 <br /> Toluene N D 5 ug/l 103 85-135 <br /> 82-119 <br /> Ethylbenzene N D 5 ug/1 101 84-120 <br /> Xylene (Total) N D 5 ug/l 104 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 04107AOSC Sample number(s) 4254917 <br /> TPH-GRO - Waters 125 63-154 <br /> Batch number 0410BA16A sample number(s) 4254920-4254921,4254924 <br /> TPH-GRO - Waters 121 63-154 <br /> Batch number 04108A16B Sample number(B) 4254918-4254919,4254922-4254923 <br /> TPH-GRO - Waters 121 63-154 <br /> Batch number P041122AA Sample number(s) 4254917-4254924 <br /> Methyl Tertiary Butyl Ether 111 106 69-134 5 30 <br /> Benzene 115 110 83-128 5 30 <br /> Toluene 117 111 83-127 5 30 <br /> Ethylbenzene 116 112 62-129 4 30 <br /> Xylene (Total) 117 112 82-130 4 30 <br /> Surrogate Quality Control <br /> *-Outside of specification <br /> 401} The result for one or both determinations was less than five times the LOQ <br /> 2) The background result was more than four Mmes the spike added <br />