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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: 1105078 <br /> Reported: 08/29/08 at 09:11 AM <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: 08229110101A Sample number(s) : 5439778 UNSPK: P440542 BKG: P440542 <br /> Total Phosphorus as PO4 water 105 90-110 N.D. N.D. 0 (1) 3 <br /> Batch number: 08231020201A Sample number(s) : 5439778 UNSPK: P439525 BKG: P439525 <br /> Alkalinity to pH 8.3 N.D. N.D. 0 (1) 4 <br /> Alkalinity to pH 4.5 93 94 64-130 1 2 170,000. 171,000. 1 4 <br /> Batch number: L082272AA Sample number(s) : 5439776-5439778 UNSPK: P439852 <br /> Benzene 107 85-126 <br /> Toluene 107 87-128 <br /> Ethylbenzene 110 89-129 <br /> Xylene (Total) 111 84-131 <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: 082260026A <br /> Orthoterphenyl <br /> 5439777 67 <br /> 5439778 79 <br /> Blank 81 <br /> LCS 52 <br /> LCSD 49 <br /> Limits: 45-114 <br /> Analysis Name: PAHs in Water by LVI GC/MS <br /> Batch number: 08226WAP026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5439777 98 101 94 <br /> 5439778 101 109 103 <br /> Blank 80 105 106 <br /> LCS 86 110 107 <br /> LCSD 89 115 109 <br /> Limits: 64-161 62-134 61-150 <br /> Analysis Name: TPH-DRO(C10-C25)Water w/ SiGel <br /> Batch number: 082350024A <br /> Orthoterphenyl <br /> 5439777 74 <br /> 5439778 59 <br /> Blank 64 <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 />