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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: 1029184 <br /> Reported: 03/27/07 at 10:12 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 /> Kjeldahl Nitrogen 97 90-110 N.D. N.D. 67* (1) 4 <br /> Batch number: 07077020201A Sample number(s) : 5004027 UNSPK: P006563 BKG: P006563 <br /> Alkalinity to pH 8.3 N.D. N.D. 0 (1) 4 <br /> Alkalinity to pH 4.5 97 95 64-130 1 2 343,000. 341,000. 1 4 <br /> Batch number: 07079110101A Sample number(s) : 5004027 UNSPK: P007119 BKG: P007119 <br /> Total Phosphorus as PO4 water 45* 90-110 3,200. 3,200. 1 3 <br /> Batchnumber: 07085028001A Sample number(s) : 5004027 BKG: 5004027 <br /> Specific Conductance 3,290. 3,290. 0 1 <br /> Batch number: C070781AA Sample number(s) : 5004027-5004030 UNSPK: P003024 <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: 070740001A <br /> Orthoterphenyl <br /> 5004027 102 <br /> 5004028 98 <br /> Blank 101 <br /> LCS 119 <br /> LCSD 126 <br /> Limits: 59-131 <br /> Analysis Name: PAHs in Water by LVI GC/MS <br /> Batch number: 07078WABO26 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5004027 142* 104 109 <br /> 5004028 126 112 119 <br /> 5004030 138* 126 136* <br /> Blank 121 105 128 <br /> LCS 109 99 107 <br /> LCSD 118 107 118 <br /> Limits: 70-130 70-130 70-130 <br /> Analysis Name: TPH-DRO (C10-C25) Water <br /> Batch number: 070790002A <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 />