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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425-717-656-2300 Fax:717-656-2681•www.larcasterIabs.com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 988457 <br /> Reported: 05/24/06 at 01:31 PM <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 Conc Conc RPD Max <br /> Batch number: 061260013A Sample number(s) : 4765545-4765547,4765549-4765550 UNSPK: P765560 <br /> TPH-DRO (C10-C25) Water 103 78 59-128 26* 20 <br /> Batch number: 06128A54A Sample number(s) : 4765545-4765547,4765550 UNSPK: P765560 <br /> TPH-GRO - Waters 115 115 63-154 0 30 <br /> Benzene 100 101 78-131 0 20 <br /> Toluene 103 103 78-129 0 30 <br /> Ethylbenzene 106 105 75-133 1 30 <br /> Total Xylenes 105 104 84-131 1 30 <br /> Batch number: 06128A54B Sample number(s) : 4765549 UNSPK: P765560 <br /> TPH-GRO - Waters 115 115 63-154 0 30 <br /> Benzene 100 101 78-131 0 20 <br /> Toluene 103 103 78-129 0 30 <br /> Ethylbenzene 106 105 75-133 1 30 <br /> Total Xylenes 105 104 84-131 1 30 <br /> Batch number: 06129A56A Sample number(s) : 4765548 UNSPK: P763815 <br /> Benzene 111 109 78-131 2 20 <br /> Toluene 114 112 78-129 1 30 <br /> Ethylbenzene 116 116 75-133 0 30 <br /> Total Xylenes 116 116 84-131 0 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: TPH-DRO (C10-C25) Water <br /> Batch number: 061260013A <br /> Orthoterphenyl <br /> 4765545 90 <br /> 4765546 86 <br /> 4765547 95 <br /> 4765549 92 <br /> 4765550 90 <br /> Blank 88 <br /> LCS 98 <br /> MS 110 <br /> MSD 100 <br /> Limits: 59-131 <br /> Analysis Name: BTEX <br /> Batch number: 06128A54A <br /> Trifluorotoluene-F Trifluorotoluene-P <br /> 4765545 96 96 <br /> 4765546 97 97 <br /> 4765547 95 96 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ. <br /> (2) The background result was more than four times the spike added. <br />