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LancasterReport <br /> Laboratories Analysis p <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 656-2300 Fax 717 65&2681-www lancasterlabs com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 984354 <br /> Reported 03/16/06 at 10 54 AM <br /> Sample Matrix Quality Control <br /> Unspzked (UNSPK) = the sample used in con3unetion with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSA RPD BKG DUP DUP Dup RPD <br /> Analyaie Name PRBC %REC Limits RPD MAR Conc Cone RPD Ma, <br /> TPH-GRO - Soils 90 87 39-118 3 30 <br /> Batch number A060681AA Sample number(s) 4721815-4721833 UNSPK P721477 <br /> Methyl Tertiary Butyl Ether 94 101 47-130 7 30 <br /> di-Isopropyl ether 99 103 58-122 4 30 <br /> Ethyl t-butyl ether 98 104 57-122 5 30 <br /> t-Amyl methyl ether 98 104 58-119 6 30 <br /> "- <br /> t--Butyl-alcohol —97—97 —102- -51-134 --=5` - 30 <br /> Benzene 97 101 59-120 3 3C <br /> 1,2�Dlchloroethane 101 108 62-1306 30 <br /> Toluene 99-100-497132— 1 30 <br /> _1,2-Dibromcethane 95 100 62-116 5 30 <br /> Ethylbenzene T_ 99mT 101 50-127 -- `1` 30 <br />�Etkiariol li3 113 11=161 0 30 <br /> Xylene (Total) 96 98 44-127 1 30 <br /> Batch number A060691AA Sample number(s) 4721834-4721836 UNSPK P723160 <br /> Methyl Tertiary Butyl Ether 84 87 47-130 4 30 <br /> di-Isopropyl ether 91 92 5B-122 2 30 <br /> Ethyl t-butyl ether 87 89 57-122 3 30 <br /> t-Amy], methyl ether 87 90 58-119 4 30 <br /> t-Butyl alcohol 93 94 51-134 2 30 <br /> Benzene 99 101 59-120 2 30 <br /> 1,2-Dichloroethane 90 92 62-130 3 30 <br /> Toluene 101 102 49-132 1 3C <br /> 1,2-D-Lbromoethane 88 92 62-116 4 30 <br /> Ethylbenzene 100 102 50-127 2 30 <br /> Ethanol 112 112 11-161 0 30 <br /> Xylene (Total) 97 98 44-127 2 30 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted an the Analysis Report <br /> Analysis Name TAH-GRO - Soils <br /> Batch number 06065A02A <br /> Trifluorotoluene-F <br /> 4721815 79 <br /> 4721816 101 <br /> 4721817 76 <br /> 4721818 61 <br /> 4721819 71 <br /> 4721822 75 <br /> 4721823 80 <br /> 4721824 88 <br /> 4721825 90 <br /> 4721826 84 <br /> 4721827 83 <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 />