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`i Lancaster, Analysis Report <br /> 1. Laboratories Y <br /> 2425 New Holland Pike,PO Boz 12425,(ancester,PA 17605-2425•717-656-2300 Fax:717-656-2681•www.larrasteriabs.com <br /> Page 15 of 21 <br /> Quality Control Summary <br /> Client Name: Chevron Group Number: 1210197 <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 /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Mame IhREC %RHC Limits RPD HU Conc Conc RPD KRZ <br /> 2-Chloroethyl Vinyl Ether 0• 0* 10-151 0 30 <br /> Chloroform 103 106 81-134 2 30 <br /> Chloromethane 81 74 67-154 9 30 <br /> 2-Chlorotoluene 105 105 82-118 0 30 <br /> 4-Chlorotoluene 105 106 84-122 1 30 <br /> 1,2-Dibromo-3-chloropropane 88 88 66-121 1 30 <br /> Dibromochloromethane 81 81 74-116 1 30 <br /> 1,2-Dibromoethane 95 95 77-116 0 30 <br /> Dibromomethane 96 93 83-119 3 30 <br /> 1,2-Dichlorobenzene 99 99 84-119 0 30 <br /> 1,3-Dichlorobenzene 101 101 86-121 0 30 <br /> 1,4-Dichlorobenzene 100 100 85-121 0 30 <br /> Dichlorodifluoromethane 56 56 52-129 0 30 <br /> 1,1-Dichloroethane 110 111 84-129 2 30 <br /> 1,2-Dichloroethane 96 95 66-141 1 30 <br /> 1,1-Dichloroethene 114 115 85-142 1 30 <br /> cis-1,2-Dichloroethane 104 104 85-125 0 30 <br /> trans-1,2-Dichloroethene 107 107 87-126 1 30 <br /> 1,2-Dichloropropane 109 110 83-124 1 30 <br /> 1,3-Dichloropropane 102 103 81-120 1 30 <br /> 2,2-Dichloropropane 97 98 81-135 1 30 <br /> 1,1-Dichloropropene 107 109 86-137 2 30 <br /> cis-1,3-Dichloropropene 97 96 75-125 1 30 <br /> trans-1,3-Dichloropropene 92 91 74-119 1 30 <br /> Ethanol 48 52 37-164 8 30 <br /> Ethyl t-butyl ether 99 99 74-122 0 30 <br /> Ethylbenzene 103 104 71-134 1 30 <br /> Freon 113 119 117 89-148 1 30 <br /> Hexachlorobutadiene 75 73 56-134 3 30 <br /> 2-Hexanone 89 91 55-127 1 30 <br /> di-Isopropyl ether 105 105 70-129 0 30 <br /> Isopropylbenzene 102 101 75-128 1 30 <br /> p-Isopropyltoluene 104 104 76-123 0 30 <br /> Methyl Tertiary Butyl Ether 98 98 72-126 1 30 <br /> 4-Methyl-2-pentan0ne 93 93 63-123 0 30 <br /> Methylene Chloride 133• 130• 79-120 2 30 <br /> Naphthalene 101 102 52-125 0 30 <br /> n-Propylbenzene 114 115 74-134 1 30 <br /> Styrene 95 95 78-125 0 30 <br /> 1,1,1,2-Tetrachloroethane 91 90 82-119 1 30 <br /> 1,1,2,2-Tetrachloroethane 105 107 73-119 2 30 <br /> Tetrachloroethane 98 97 80-128 1 30 <br /> Toluene 105 104 80-125 1 30 <br /> 1,2,3-Trichlorobenzene 95 93 69-119 2 30 <br /> 1,2,4-Trichlorobenzene 94 92 70-124 2 30 <br /> 1,1,1-Trichloroethane 104 104 80-143 0 30 <br /> 1,1,2-Trichloroethane 101 99 77-124 2 30 <br /> Trichloroethene 104 105 88-133 1 30 <br /> Trichlorofluoromethane 87 86 73-152 1 30 <br /> 1,2,3-Trichloropropane 101 102 76-118 1 30 <br /> 1,2,4-Trimethylbenzene 105 106 72-130 0 30 <br /> 1,3,5-Trimethylbenzene 108 109 72-131 1 30 <br /> Vinyl Chloride 90 89 66-133 2 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 />