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1 <br /> ' Lancaster Analysis Report <br /> Laboratories Y p <br /> ' 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-656-2681•www.lancasterlabs.com <br /> Pagel of 4 <br /> ' Quality Control Summary <br /> Client Name: Chevron Group Number: 1118767 <br /> Reported: 11/20/08 at 01:55 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted. In these situations, to demonstrate precision 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 Un Units %REC 1= Limits RP2 RPD Max <br /> Batch number: 083121848008 Sample number(s) : 5520457,5520459,5520461,5520463,5520465,5520467 <br /> Lead N.D. 6.9 ug/l 109 90-113 <br /> ' Batch number: 083160015A Sample number(s) : 5520460,5520462,5520464,5520466 <br /> DRO (C10-C28) N.D. 32. ug/1 91 95 63-119 4 20 <br /> Batch number: 083160023A Sample number(s) : 5520456,5520458 <br /> ' DRO (CID-C28) N.D. 32. ug/l 94 100 63-119 6 20 <br /> Batch number: 08316B20A Sample number(s) : 5520456,5520458 <br /> TPH-GRO - Waters N.D. 50. ug/1 118 118 75-135 0 30 <br /> Batch number: 08317A07A Sample number(s) : 5520460,5520462,5520464,5520468 <br /> ' TPH-GRO - Waters N.D. 50. ug/1 118 109 75-135 8 30 <br /> Batch number: 08318A07A Sample number(s) : 5520466 <br /> TPH-GRO - Waters N.D. 50. ug/1 90 85 75-135 5 30 <br /> ' Batch number: D083171AA Sample number(s) : 5520468 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 97 73-119 <br /> Benzene N.D. 0.5 ug/1 91 78-119 <br /> Toluene N.D. 0.5 ug/l 100 85-115 <br /> Ethylbenzene N.D. 0.5 ug/1 99 82-119 <br /> t Xylene (Total) N.D. 0.5 ug/1 103 83-113 <br /> Batch number: D083173AA Sample number(s) : 5520456,5520458,5520460,5520462,5520464,5520466 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/1 98 73-119 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 101 79-113 <br /> t-Butyl alcohol N.D. 2. ug/l 95 74-117 <br /> Benzene N.D. 0.5 ug/l 89 78-119 <br /> Toluene N.D. 0.5 ug/1 93 85-115 <br /> Ethylbenzene N.D. 0.5 ug/1 92 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 97 83-113 <br /> ' Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> ' Background (BKS) = the sample used in conjunction with the duplicate. <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name RE *REC Limits RPD MAX Conc Cone RM Maxim <br /> Batch number: 083121848008 Sample number(s) : 5520457,5520459,5520461,5520463,5520465,5520467 UNSPK: P520092 <br /> BKG: P520092 <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 />