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1 Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 176052425-717-6656-2300 Fax:717.65&2681•www.lanGasteriabs.com ' <br /> Page 2 of 5 <br /> Quality Control Summary ' <br /> Client Name: Chevron Group Number: 1120345 <br /> Reported: 11/26/08 at 03:10 PIA ' <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result ML Units %REC %REC Limits RPD RPD Max , <br /> t-Butyl alcohol N.D. 2. ug/,1 91 79-117 <br /> Benzene N.D. 0.5 ug/l 101 78-119 <br /> Toluene N.D. 0.5 ug/l 103 85-115 <br /> Ethylbenzene N.D. 0.5 ug/l 103 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 105 83-113 <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 /> NS MSD NS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name REC %REC Limits RPD MXX Cont Conc RPD Kax <br /> Batch number: 083231848006 Sample number(s) : 5530850 UNSPK: P528112 BKG: P528112 , <br /> Lead 79 79 75-125 0 20 N.D. N.D. 0 (1) 20 <br /> Batch number: 08323B07A Sample number(s) : 5530849,5530851,5530853 UNSPK: P530669 <br /> TPH-GRO N. CA water 26-1212 110 63-154 <br /> Batch number: 083241848004 Sample number(s) : 5530852,5530854,5530856,5530858,5530860,5530862 UNSPK: P528082 ' <br /> BKG: P528082 <br /> Lead 83 84 75-125 2 20 N.D. N.D. 0 (1) 20 <br /> Batch number: 083241848005 Sample number(s) : 5530864,5530866,5530868,5530870,5530872 UNSPK: P528104 BKG: ' <br /> P528104 <br /> Lead 98 101 75-125 4 20 N.D. N.D. 0 (1) 20 <br /> Batch number: 08324A20A Sample number(s) : 5530855 UNSPK: P528393 <br /> TPH-GAO N. CA water C6-C12 117 63-154 <br /> Batch number: 08326A07A Sample number(s) : 5530857,5530859,5530861,5530863 UNSPK: P530671 ' <br /> TPH-GRO N. CA water CG-C12 118 63-154 <br /> Batch number: 08329A07A Sample number(s) : 5530865,5530867,5530869,5530871 UNSPK: P530633 <br /> TPH-GRO N. CA water C6-C12 111 63-154 ' <br /> Batch number: D083291AA Sample number(s) : 5530873 UNSPK: P530591 <br /> Methyl Tertiary Butyl Ether 99 98 69-127 1 30 <br /> t-Amyl methyl ether 90 89 72-125 0 30 <br /> t-Butyl alcohol 94 92 70-121 3 30 ' <br /> Benzene 99 98 83-128 1 30 <br /> Toluene 102 98 83-127 3 30 <br /> Ethylbenzene 98 97 82-129 1 30 - <br /> Xylene (Total) 98 96 82-130 1 30 <br /> Batch number: F083264AA Sample number(s) : ' <br /> 5530849,5530851,5530853,5530855,5530857,5530859,5530861,5530863,5530865,5530867, <br /> 5530869,5530871 UNSPK: P530677 <br /> Methyl Tertiary Butyl Ether 99102 69-127 2 30 <br /> t-Amyl methyl ether 98 101 72-125 3 30 <br /> t-Butyl alcohol 84 90 70-121 7 30 ' <br /> Benzene 108 110 83-128 1 30 <br /> *-Outside of specification <br /> (1)The result for one or both determinations was less than five times the LOQ. ' <br /> (2)-fhe unspiked result was more than four times the spike added. <br /> 1 <br />