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**Lancaster . <br /> Laboratories analys►s Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605.2425•717-656-2300 Fax:717-656-2681•www.lancasteriabs.com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 690976 <br /> Reported: 04/16/04 at 09:37 AM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BXG DUP DUP Dup RPD <br /> Analysis Name %RSC %RBC Limits RPD MAX Cone Cone RPD Max <br /> TPH - DRO CA LUFT (Soils) 74 34 21-159 45* 20 <br /> Batch number: D041001AA Sample number(s) : 4249134 <br /> Methyl Tertiary Butyl Ether -64* 6* 57-136 24 30 <br /> di-Isopropyl ether 69 82 55-132 17 30 <br /> Ethyl t-butyl ether 69 82 58-127 18 30 <br /> t-Amyl methyl ether 71 82 58-126 15 30 <br /> t-Butyl alcohol 80 85 38-160 6 30 <br /> Benzene 68 80 52-141 15 30 <br /> 1,2-Dichloroethane 68 77 57-137 13 30 <br /> Toluene 69 80 45-142 14 30 <br /> 1,2-Dibromoethane 73 82 61-125 11 30 <br /> Ethylbenzene 68 77 40-143 13 30 <br /> Xylene (Total) 69 79 40-143 14 30 <br /> Surrogate Quality Control <br /> Analysis Name: TPH Fuels by GC (Soils) <br /> Batch number: 040970000A <br /> Chlorobenzene Orthoterphenyl <br /> 4249134 75 98 <br /> Blank 97 105 <br /> LCS 101 117 <br /> MS 75 121 <br /> Limits: 24-136 42-143 <br /> Analysis Name: TPH-GRO - Soils <br /> Batch number: 04099A34A <br /> Triflucrotoluene-F <br /> 4249134 97 <br /> Blank 93 <br /> LCS 115 <br /> MS Be <br /> MSD 83 <br /> Limits: 71-122 <br /> Analysis Name: TPH - DRO CA LUFT (Soils) <br /> Batch number: 041030001A <br /> Orthoterphenyl <br /> 4249134 63 <br /> Blank 81 <br /> LCS 97 <br /> MS 75 <br /> MSD 68 <br /> Limits: 32-124 <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 />