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Analysis Rpport, Lancaster Laboratories Page 3 of 7 Wheruga�l iyts a s�ienr�e. 1 Summary Y on ro Client Name: Chevron Products Company Group Number: 783175 Reported:. 10/31/01 at 04 : 59 PM Sample Matrix Quality Control MS MSD MS/MSD RPD BKG DUP DUP DUP RPA Analysis Name %REC %REC Limits RPD MAX Cone Conc RPD Max Batch number: K012961AC Sample aumber(s) : 3711716,3711719 Methyl t-butyl ether 89 88 52-150 1 30 Benzene 96 91 53-150 5 30 Toluene 85 87 40-162 2 30 Ethylbenzene 91 67 38-163 5 30 Xylene (Total} 89 90 46-158 1 30 Batch number: K012962AA Sample number(s) : 3711733-3711735,3711737 ' Methyl t-butyl ether 79 90 52-150 12 30 Benzene 82 94 53-150 14 30 Toluene 80 84 40-162 4 30 Ethylbenzene 61 89 38-163 9 30 Xylene (Total) 83 87 46-158 5 30 Batch number: K012962AB Sample number(s) : 3711736,3711738-3711739 Methyl t-butyl ether 79 90 52-150 12 30 Benzene 82 94 53-150 14 30 Toluene 80 84 40-162 4 30 Ethylbenzene 81 89 38-163 9 30 Xylene (Total) 83 87 46-158 5 30 Surrogate Quality Control Analysis Name: TPH-GRO N. California (soils) Batch number: 01291A33 Trifluorotoluene-F 3711716 72 3711720 74 3711721 86 3711722 93 3711723 93 3711724 66 3711725 78 Blank 89 LCS 107 MS 102 MSD 108 Limits: 48-132 Analysis Name: TPH-GRO N. California (soils) Batch number: 01295A36 Trifluorotoluene-F 3711699 96 3711700 93 3711701 92 *-Outside of specification 1) The result for one or both determinations was less than five times the LOQ. 2) The background result was more than four times the spike added. Lancaster Laboratories,Inc. M E M B E R 2425 New Holland Pike ® PO Box 1 � Lancaster,r,PA PA 17605-2425 717-656-2300 f:rx717-656-2681 2216 Rev.9111/00