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Lancaster <br /> . Laboratories Analysis Report <br /> 2425 New Holland Pike PO Bax 12425 Lancaster PA 17605-2425•7117-656 2300 Fax 717-656-2681•www Iancasterlab6 coal <br /> Page 2 of 4 <br /> 04 Quality Control Summary <br /> Client Name ChevronTexaco Group Number 938400 <br /> Reported 04/14/05 at 12 42 AM <br /> 1. Sample Matrix Quality Control <br /> ME NED MS/MSD RPD BXG DVP DUP Dup RPD <br /> Analysis Name $REC %RBC Limits RPD MAX Cone Cone RPD Max_ <br /> Batch number 05098AosD Sample number(s) 4497522-4497523 <br /> TPH-GRO - Waters 144 63-154 <br /> Batch number OS099ASlA Sample number(s) 4497532 <br /> TPH-GRO - Waters 101 63-154 <br /> Batch number Z051002AA Sample number(s) 4497522 <br /> Methyl Tertiary Butyl Ether 103 104 69-134 1 30 <br /> Benzene 100 101 83-128 1 30 <br /> Toluene 102 100 83-127 2 30 <br /> Ethylbenzene 103 103 82-129 0 30 <br /> Xylene (Total) 103 102 82-130 0 30 <br /> Batch number Z051012AA Sample number(s) 4497523-4497532 <br /> Ethanol 53 70 26-153 27 30 <br /> Methyl Tertiary Butyl Ether 106 104 69-134 1 30 <br /> di-Isopropyl ether 98 99 75-130 0 30 <br /> Ethyl t-butyl ether 101 100 7B-119 1 30 <br /> t-Amyl methyl ether 104 105 77-117 1 30 <br /> t-Butyl alcohol 100 103 51-147 1 30 <br /> Benzene 98 100 83-128 2 30 . <br /> Toluene 97 99 83-127 2 30 <br /> Ethylbenzene 101 102 82-129 1 30 <br /> Xylene (Total) 99 100 82-130 2 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRo - Waters <br /> Batch number 05098AOBB <br /> Trifluorotoluene-F <br /> 4497524 119 <br /> 4497525 113 <br /> 4497526 114 <br /> 4497527 118 <br /> 4497528 ill <br /> 4497529 ill <br /> Blank ill <br /> LCS 113 <br /> LCSb 114 <br /> MS 110 <br /> Limits 70-142 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 05098AOBC <br /> Trifluorotoluene-F <br /> 4497530 110 <br /> 4497531 107 <br /> Blank 113 <br /> LCS 113 <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 />