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i <br /> tiff eurofins <br /> Lanncaaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA'17605-2425.717-656-2300 Faz:717-656-2681•www.lancasterlabs.com <br /> Page 1 of 2 . <br /> Quality Control Summary <br /> Client Name: Chevron Group Number: 1348223 <br /> Reported: 11/19/12 at 07:39 AM <br /> Matrix QC may not be reported if insufficient sample or site-specific QC samples were not submitted. In these <br /> situations, to demonstrate precis <br /> on and accuracy at a batch level, a LCS/LCSD was performed, unless otherwise <br /> specified in the method. <br /> All Inorganic Initial Calibration and Continuing Calibration Blanks met acceptable method criteria unless <br /> otherwise noted on the Analysis Report. <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: D123192AA Sample number(s) : 6855188-6855189 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 87 66-120 <br /> Benzene N.D. 0.5 ug/l 89 77-121 <br /> t-Butyl alcohol N.D. 2. ug/l 95 68-125 <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 97 76-120 <br /> 1,2-Dichloroethane N.D. 0.5 ug/l 87 64-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 86 66-120 <br /> Ethylbenzene N.D. 0.5 ug/l 92 79-120 <br /> di-Isopropyl ether N.D. 0.5 ug/l 86 71-124 <br /> Methyl Tertiary Butyl Ether N.D. -0.5 ug/l 88 68-121 <br /> Toluene N.D. 0.5 ug/l 95 79-120 <br /> Xylene (Total) N.D. 0.5 ug/l 93 77-120 <br /> Batch number: 1231BA20A Sample number(s) : 6855188-6855189 <br /> TPH-GRO N. CA water C6-C12 N.D. 50. ug/l 87 85 75-135 2 30 <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC .%REC Limits RPD MAX Coric Conc RPD Max <br /> Batch number: D123192AA Sample number(s) : 6855188-6855189 UNSPK: P855265 <br /> t-Amyl methyl ether 87 83 65-117 5 30 <br /> Benzene 94 89 72-134 5 30 <br /> t-Butyl alcohol 89 84 67-119 5 30 <br /> 1,2-Dibromoethane 95 90 77-116 5 30 <br /> 1,2-Dichloroethane 87 83 68-131 5 30 <br /> Ethyl t-butyl ether 85 82 74-122 4 30 <br /> Ethylbenzene 95 92 71-134 4 30 <br /> di-Isopropyl ether 87 83 70-129. 5 30 - <br /> Methyl Tertiary Butyl Ether 85 81 72-126 4 30 <br /> Toluene 96 92 80-125 5 30 <br /> Xylene (Total) 95 91 79-125 4 30 <br /> Surrogate Quality Control <br /> *-Outside of specification <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br /> Page 4 of 7 <br />