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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.lancastarlabs.com <br /> Page 4 of 4 <br /> Quality Control Summary <br /> ' Client Name: Chevron Group Number: 1128686 <br /> Reported: 01/29/09 at 02:12 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 SKG DUP DUP Dup RPD <br /> Analysis Name %REC %RRC Limits RPD MAX Conc Conc RPD Max <br /> Carbon Disulfide 105 110 69-146 5 30 <br /> 2-Butanone 107 114 57-137 6 30 <br /> trans-1,3-Dichloropropene 106 110 77-123 4 30 <br /> cis-1,3-Dichloropropene 108 114 72-124 6 30 <br /> 4-Methyl-2-pentanone 109 115 61-131 5 30 <br /> 2-Hexanone 103 110 60-135 7 30 <br /> 2-Chloroethyl Vinyl Ether 0* 0* 1-156 0 30 <br /> Freon 113 137 144 72-154 5 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-GRO N. CA water C6-C12 <br /> Batch number: 09021B07A <br /> Trifluorotoluene-F <br /> 5579890 104 <br /> 5579891 106 <br /> Blank 105 <br /> LCS 114 <br /> LCSD 114 <br /> a MS 115 <br /> Limits: 63-135 <br /> Analysis Name: EPA SW846/8260 (water) <br /> Batch number: N090212AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-de 4-Bromofluorobenzene <br /> 5579890 108 103 99 105 <br /> 5579891 108 101 99 106 <br /> Blank 107 102 99 104 <br /> LCS 109 103 100 107 <br /> MS 108 105 100 107 <br /> MSD 108 105 100 108 <br /> Limits: 80-116 77-113 80-113 78-113 <br /> r <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 /> i <br /> i <br />