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Lancaster <br /> Laboratories Analysis Report � <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717-656-2300 Fax 717-656 26811 www lancasterlabs com <br /> Page 1 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 903459 <br /> Reported 07/26/044 at 05 10 PM <br /> Matnx QC may not be reported if site-specific QC samples were not <br /> submitted In these situations,to demonstrate preusion 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 04197AO7B Sample number(s) 4309710-4309714,4309716-4309719 <br /> TPH-GRO - Waters N D 50 ug/l 105 100 70-130 5 30 <br /> Batch number 04198AO8C Sample number(s) 4309715 <br /> TPH-GRO - Waters N D 50 ug/l 94 97 70-130 3 30 <br /> Batch number P041972AA Sample number(s) 4309710 <br /> Methyl Tertiary Butyl Ether N D 2 u9/1 110 77-127 <br /> Benzene N D 5 ug/l 109 85-117 <br /> Toluene N D 5 ug/l 108 85-115 <br /> Ethylbenzene N D 5 ug/1 109 82-119 <br /> Xylene (Total) N D 5 ug/l 110 84-120 <br /> Batch number Z042031AA Sample number(s) 4309711-4309719 <br /> Ethanol N D 500 ug/l 101 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 112 77-127 <br /> dx-Isopropyl ether N D 2 ug/l 120 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 107 74-120 <br /> t-Amyl methyl ether N D 2 ug/1 97 79-113 <br /> t-Butyl alcohol N D 100 ug/l 95 57-141 <br /> Benzene N D 5 ug/l 103 85-117 <br /> Toluene N D 5 ug/1 102 85-115 <br /> Ethylbenzene N D 5 ug/l 101 82-119 <br /> Xylene (Total) N D 5 ug/l 98 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP DUP Dup RPD <br /> Analysis Name %REC %RRC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 04197AO7B Sample number(s) 4309710-4309714,4309716-4309719 <br /> TPH-GRO - Waters 149 63-154 <br /> Batch number 04198A48C Sample number(s) 4309715 <br /> TPH-GRO - Waters 93 63-1.54 <br /> Batch number P041972AA Sample number(s) 4309710 <br /> Methyl Tertiary Butyl Ether 112 110 69-134 1 30 <br /> Benzene 110 113 83-128 2 30 <br /> Toluene 114 114 83-127 1 30 <br /> Ethylbenzene 113 113 82-129 1 30 <br /> xylene (Total) 113 112 82-130 0 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 />