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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 3 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1028980 <br /> Reported: 03/26/07 at 03:40 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 /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Benzene 109 85-126 <br /> Toluene 106 87-128 <br /> Ethylbenzene 109 88-128 <br /> Xylene (Total) 109 84-127 <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: 070730014A <br /> Orthoterphenyl <br /> 5003020 86 <br /> 5003021 86 <br /> 5003022 97 <br /> 5003024 64 <br /> Blank 90 <br /> LCS 108 <br /> LCSD 105 <br /> Limits: 59-131 <br /> Analysis Name: PAHs in Water by LVI GC/MS <br /> Batch number: 07073WAE026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5003020 147* 77 128 <br /> 5003021 160* 107 130 <br /> 5003022 125 115 115 <br /> 5003024 160* 120 119 <br /> Blank 105 107 122 <br /> LCS 114 116 126 <br /> LCSD 108 108 118 <br /> Limits: 70-130 70-130 70-130 <br /> Analysis Name: TPH-DRO(C10-C25)Water w/ SiGel <br /> Batch number: 070790020A <br /> Orthoterphenyl <br /> 5003020 72 <br /> 5003021 71 <br /> 5003022 82 <br /> 5003024 56* <br /> Blank 79 <br /> LCS 94 <br /> LCSD 91 <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 />