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Lancaster r <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-6562681•www.Iancasterlabs.com , <br /> Page 16 of 21 <br /> Quality Control Summary <br /> Client Name: Chevron Group Number: 1210187 , <br /> Reported: 09/14/10 at 04:55 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 /> 118 NSD NS/NSD RPD EKG DUP DUP Dup APD <br /> Analysis Name NW $RRC Limits RPD Im conc Conc APD Max <br /> m+p-Xylene 102 102 79-125 0 30 , <br /> o-Xylene 101 101 79-125 0 30 <br /> Batch number: W102502AA Sample number(s) : 6075611-6075618 UNSPK: 6075611 <br /> Acetone 90 93 52-139 4 30 <br /> t-Amyl methyl ether 93 97 75-122 5 30 <br /> Benzene 102 107 80-126 5 30 <br /> Bromobenzene 93 97 82-115 5 30 <br /> Bromochloromethane 92 97 83-123 5 30 <br /> Bromodichloromethane 89 92 78-125 4 30 <br /> Bromoform 70 72 60-121 3 30 <br /> Bromomethane 87 92 38-149 6 30 <br /> 2-Butanone 97 102 57-138 4 30 <br /> t-Butyl alcohol 94 89 67-119 5 30 <br /> n-Butylbenzene 103 105 73-128 2 30 <br /> sec-Butylbenzene 103 107 79-125 3 30 <br /> tert-Butylbenzene 100 104 81-121 3 30 <br /> Carbon Disulfide 112 117 67-135 5 30 <br /> Carbon Tetrachloride 93 97 81-138 5 30 <br /> Chlorobenzene 97 97 87-124 1 30 <br /> Chloroethane 100 99 51-145 1 30 <br /> 2-Chloroethyl Vinyl Ether 0* 0* 10-151 0 30 <br /> Chloroform 99 103 81-134 4 30 <br /> Chloromethane 98 102 67-154 4 30 <br /> 2-Chlorotoluene 100 104 82-118 4 30 <br /> 4-Chlorotoluene 101 105 64-122 4 30 <br /> 1,2-Dibromo-3-chloropropane 85 89 66-121 5 30 <br /> Dibromochloromethane 81 84 74-116 4 30 <br /> 1,2-Dibromoethane 89 91 77-116 2 30 <br /> Dibromomethane 93 96 83-119 4 30 <br /> 1,2-Dichlorobenzene 94 97 84-119 3 30 <br /> 1,3-Dichlorobenzene 94 99 86-121 6 30 <br /> 1,4-Dichlorobenzene 96 98 85-121 3 30 <br /> Dichlorodifluoromethane 92 91 52-129 1 30 <br /> 1,1-Dichloroethane 105 112 84-129 6 30 <br /> 1,2-Dichloroethane 100 105 66-141 5 30 <br /> 1,1-Dichloroethene 105 112 85-142 6 30 <br /> cis-1,2-Dichloroethene 96 101 85-125 5 30 <br /> true-1,2-Dichloroethene 98 103 87-126 5 30 <br /> 1,2-Dichloropropane 104 110 83-124 5 30 <br /> 1,3-Dichloropropane 97 101 81-120 5 30 <br /> 2,2-Dichloropropane 94 100 81-135 6 30 , <br /> 1,1-Dichloropropene 106 111 86-137 5 30 <br /> cis-1,3-Dichloropropene 94 98 75-125 5 30 <br /> trans-1,3-Dichloropropene 91 92 74-119 1 30 <br /> Ethanol 90 76 37-164 16 30 <br /> Ethyl t-butyl ether 98 102 74-122 3 30 ' <br /> Ethylbenzene 98 101 71-134 2 30 <br /> Freon 113 116 120 89-148 4 30 <br /> Hexachlorobutadiene 82 86 56-134 5 30 <br /> 2-Hexanone 91 95 55-127 5 30 <br /> di-Isopropyl ether 107 113 70-129 6 30 , <br /> Isopropylbenzene 96 100 75-128 3 30 <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 />