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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: 1083271 <br /> Reported: 04/09/08 at 06:42 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 110 94-128 <br /> Ethylbenzene 113 96-128 <br /> Xylene (Total) 111 91-126 <br /> Batch number: C080951AA Sample number(s) : 5313658 UNSPK: P316213 <br /> Benzene 105 85-126 <br /> Toluene 103 94-128 <br /> Ethylbenzene 102 96-128 <br /> Xylene (Total) 101 91-126 <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: 080870022A <br /> Orthoterphenyl <br /> 5313655 109 <br /> 5313657 87 <br /> 5313658 101 <br /> 5313659 95 <br /> Blank 82 <br /> LCS 99 <br /> LCSD 103 <br /> Limits: 45-114 <br /> Analysis Name: PAHs in Water by LVI GC/MS <br /> Batch number: 08087WAE026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5313655 73 97 103 <br /> 5313657 106 114 135 <br /> 5313658 129 105 130 <br /> 5313659 111 109 143 <br /> Blank 109 106 118 <br /> LCS 108 105 119 <br /> LCSD 108 103 119 <br /> Limits: 64-161 62-134 61-150 <br /> Analysis Name: TPH-DRO(C10-C25)Water w/ SiGel <br /> Batch number: 080940023A <br /> Orthoterphenyl <br /> 5313655 81 <br /> 5313658 89 <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 />