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Oeurofins <br /> 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.lancasteriabs.Com <br /> Page 3 of 6 1 <br /> Quality Control Summary <br /> Client Name: Chevron Group Number: 1302793 <br /> Reported: 05/02/12 at 02:55 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 /> Batch number: P:1.21113AA Sample number(s) 6619157-6619160 UNSPK: P622271 <br /> t-Amyl methyl ether 95 94 65-117 1 30 <br /> Benzene 94 94 72-134 0 .30 <br /> t-Butyl alcohol 98 98 67-119 0 30 <br /> 1,2-Dibromoethane 92 92 77-116 0 30 <br /> 1,2-Dichloroethane 87 86 68-131 1 30 <br /> Ethanol 114 111 53-146 3 30 <br /> Ethyl t-butyl ether 98 97 74-122 1 30 <br /> Ethylbenzene 101 101 71-134 0 30 <br /> di-Isopropyl ether 94 94 70-129 0 30 <br /> Methyl Tertiary Butyl Ether 95 95 72-126 1 30 — <br /> Toluene 104 103 80-125 1 30 <br /> Xylene (Total) 99 99 79-125 0 30 <br /> Batch number: P:.21162AA Sample number(s) : 6619157,6619161 UNSPK: 6619161 <br /> t-Amyl methyl ether 98 98 65-117 0 30 <br /> Benzene 101 101 72-134 0 30 <br /> t-Butyl alcohol 94 94 67-119 0 30 <br /> 1,2-Dibromoethane 91 92 77-116 1 30 <br /> 1,2-Dichloroethane 91 90 68-131 1 30 <br /> Ethanol 97 91 53-146 6 30 <br /> Ethyl t-butyl ether 100 101 74-122 1 30 <br /> Ethylbenzene 98 98 71-134 0 30 <br /> di-Isopropyl ether 100 100 70-129 0 30 <br /> Methyl Tertiary Butyl Ether 96 98 72-126 3 30 <br /> Toluene 102 102 80-125 0 30 <br /> Xylene (Total) 96 96 79-125 0 30 <br /> Batch number: 121110021A Sample number(s) : 6619157-6619163 UNSPK: P620723 <br /> Methanol 96 88 52-159 9 20 <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. i <br /> Analysis Name: UST VOCs by 8260B - Water 1 <br /> Batch number: F121104AA JI <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 T61uene-d8 4-Bromofluorobenzene <br /> 6619156 93 99 97 88 <br /> Blank 94 100 96 86 <br /> LCS 93 102 96 93 <br /> MS 92 101 98 95 <br /> MSD 94 103 97 95 <br /> Limits: 80-116 77-113 80-113 78-113 1 <br /> Analysis Name: UST VOCs by 8260B - Water _l1 <br /> Batch number: F121152AA <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 />