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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 3 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1105967 <br /> Reported: 09/07/08 at 12:24 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 /> Boron 100 101 88-111 1 20 77.2 76.3 1 (1) 20 <br /> Batchnumber: 08238028002A Sample number(s) : 5444430 BKG: 5444430 <br /> Specific Conductance 1,240 1,240 0 1 <br /> Batch number: 08240020201A Sample number(s) : 5444430 UNSPK: P447707 BKG: P447707 <br /> Alkalinity to pH 8.3 ND ND 0 (1) 4 <br /> Alkalinity to pH 4.5 97 97 64-130 0 2 159,000 161,000 1 4 <br /> Batch number: L082341AA Sample number(s) : 5444430-5444432 UNSPK: P443253 <br /> Benzene 108 108 85-126 0 30 <br /> Toluene 109 111 87-128 2 30 <br /> Ethylbenzene 109 110 89-129 0 30 <br /> Xylene (Total) 108 108 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: 082340007A <br /> Orthoterphenyl <br /> 5444430 91 <br /> 5444431 88 <br /> Blank 86 <br /> LCS 95 <br /> LCSD 105 <br /> Limits: 45-114 <br /> Analysis Name: PAHs in Water by LVI GC/MS <br /> Batch number: 08234WAH026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5444430 110 97 100 <br /> 5444431 119 114 114 <br /> Blank 125 111 129 <br /> LCS 121 108 117 <br /> LCSD 114 110 110 <br /> Limits: 64-161 62-134 61-150 <br /> Analysis Name: TPH-DRO(C10-C25)Water w/ SiGel <br /> Batch number: 082490004A <br /> Orthoterphenyl <br /> 5444430 75 <br /> Blank 82 <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 />