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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Boz 12425,Lancaster,PA 17605-2425•717-656-2300 FU:717-858-2681•W W W.IancasterlabS.com ' <br /> Page 2 of 4 <br /> Quality Control Summary ' <br /> Client Name: Chevron Group Number: 1118767 <br /> Reported: 11/20/08 at 01:55 PM ' <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 /> ME MSD MS/MSD RPD BKG DUP DUP DUP RPD ' <br /> Analysis Name %REC %REC Limits RPD MAX Conc Cone RPD <br /> Lead 106 104 75-125 2 20 N.D. N.D. 0 (1) 2x0 <br /> Batch number: 08316B20A Sample number(s) : 5520456,5520458 UNSPK: P519997 <br /> TPH-GRO - Waters 113 63-154 ' <br /> Batch number: 08317A07A Sample number(s) : 5520460,5520462,5520464,5520468 UNSPK: P515730 <br /> TPH-GRO - Waters 118 118 63-154 0 30 <br /> Batch number: 0831SA07A Sample number(s) : 5520466 UNSPK: P524303 , <br /> TPH-GRO - Waters 118 63-154 <br /> Batch number: D083171AA Sample number(s) : 5520468 UNSPK: P518601 <br /> Methyl Tertiary Butyl Ether 97 98 69-127 1 30 <br /> Benzene 95 95 83-126 1 30 ' <br /> Toluene 96 95 83-127 2 30 <br /> Ethylbenzene 97 94 82-129 2 30 <br /> Xylene (Total) 95 94 82-130 1 30 <br /> Batch number: D083173AA Sample number(s) : 5520456,5520458,5520460,5520462,5520464,5520466 UNSPK: 5520456 <br /> Methyl Tertiary Butyl Ether 100 100 69-127 0 30 ' <br /> t-Amyl methyl ether 102 103 72-125 1 30 <br /> t-Butyl alcohol 92 94 70-121 2 30 <br /> Benzene 95 95 83-128 0 30 <br /> Toluene 99 96 83-127 3 30 <br /> Ethylbenzene 98 98 82-129 1 30 ' <br /> Xylene (Total) 102 101 82-130 1 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 on the Analysis Report. <br /> Analysis Name: DRO (C10-C28) ' <br /> Batch number: 083160015A <br /> Orthoterphenyl <br /> 5520460 76 <br /> 5520462 78 <br /> 5520469 79 ' <br /> 5520966 78 <br /> Blank 80 <br /> LCS 86 <br /> LCSD 89 <br /> Limits: 59-131 ' <br /> Analysis Name: DAO (C10-C28) <br /> Batch number: 083160023A <br /> Orthoterphenyl <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 />