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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: 1082853 <br /> Reported: 04/10/08 at 06:55 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 /> Toluene 108 58-116 <br /> Ethylbenzene 107 54-116 <br /> Xylene (Total) 107 52-117 <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: Custom TPH with Ranges (soil) <br /> Batch number: 080880039A <br /> Chlorobenzene orthoterphenyl <br /> 5311119 71 88 <br /> 5311120 95 91 <br /> 5311121 101 88 <br /> 5311122 140* 90 <br /> 5311123 104 88 <br /> 5311124 97 84 <br /> 5311125 308* 143 <br /> 5311126 63 88 <br /> Blank 104 91 <br /> LCS 105 102 <br /> MS 80 97 <br /> MSD 75 99 <br /> Limits: 37-125 47-145 <br /> Analysis Name: PAHs in soils by SIM <br /> Batch number: 08088SLD026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 5311119 99 91 102 <br /> 5311120 88 87 99 <br /> 5311121 101 90 101 <br /> 5311122 177* 93 112 <br /> 5311123 108 94 99 <br /> 5311124 102 87 94 <br /> 5311126 105 93 97 <br /> Blank 102 92 101 <br /> LCS 102 94 102 <br /> MS 102 93 102 <br /> MSD 102 94 103 <br /> Limits: 53-152 63-129 66-142 <br /> Analysis Name: PAHs in soils by SIM <br /> Batch number: 08093SLCO26 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> *-Outside of specification <br /> **-This limit was used in the evaluation of the final result for the blank <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 />