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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: 1083631 <br /> Reported: 04/09/08 at 08:17 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 /> Batch number: 08094020201A Sample number(s) 5315709 UNSPK: P315723 EKG: P315723 <br /> Alkalinity to pH 8.3 N.D. N.D. 0 (1) 4 <br /> Alkalinity to pH 4.5 100 100 64-130 0 2 217,000. 223,000. 3 4 <br /> Batchnumber: 08095028001A Sample number(s) : 5315709 BKG: 5315709 <br /> Specific Conductance 3,520. 3,490. 1 1 <br /> Batch number: C080951AA Sample number(s) : 5315706-5315709 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: 080910000A <br /> Orthoterphenyl <br /> 5315707 104 <br /> 5315708 97 <br /> 5315709 91 <br /> Blank 95 <br /> LCS 112 <br /> LCSD 106 <br /> Limits: 45-114 <br /> Analysis Name: PAHs in Water by LVI GC/MS <br /> Batch number: 08091WACO26 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5315707 110 101 147 <br /> 5315708 108 106 117 <br /> 5315709 105 104 133 <br /> Blank 98 87 120 <br /> LCS 115 82 106 <br /> LCSD 119 83 114 <br /> Limits: 64-161 62-134 61-150 <br /> Analysis Name: TPH-DRO(C10-C25)Water w/ SiGel <br /> Batch number: 080990000A <br /> Orthoterphenyl <br /> 5315707 72 <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 />