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I <br /> LancasterReport <br /> Laboratories Analysis s <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 17-556-2661 www lancasterlabs com <br /> IPage 3 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 965273 <br /> Reported 11/14/05 at 93 39 PM <br /> Sample Matrix Quality Control <br /> MS MSD Ms/MSD RPD BKG DIIP DIIP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 0530SA08A Sample number(s) 4635974-4635977 <br /> TPH-GRO - waters 114 63-154 <br /> Batch number W053031AC Sample number(s) 4635974 <br /> Ethanol 82 73 26-162 13 30 <br /> Methyl Tertiary Butyl Ether 69 64* 69-134 3 30 <br /> di-Isopropyl ether 94 98 75-130 4 30 <br /> Ethyl t-butyl ether 95 98 78-119 4 30 <br /> t-Amyl methyl ether 97 98 72-125 1 30 <br /> t-Butyl alcohol 98 99 56-134 1 t 30 <br /> Dichlorodifluoromethane 93 95 64-203 2 l 30 <br /> Chloromethane 82 66 69-155 4 30 <br /> Vinyl Chlorxde 87 99 81-150 4 1 30 <br /> Bromomethane 94 94 59-143 1 I 30 <br /> Chloroethane 92 93 63-142 1 30 <br /> Trichlorofluoromethane 109 108 77-177 1 30 <br /> 1,1-Dichloroethene 110 112 87-145 2 30 <br /> Methylene Chloride 90 93 79-133 3 30 <br /> trans-1,2-Dichloroethene 103 104 82-133 1 30 <br /> *-Dichloroethane 103 102 85-135 1 30 <br /> xchloropropane 109 109 79-146 1 30 <br /> 2-Dichloroethene 100 103 83-126 2 30 <br /> oform 105 105 82-131 1 30 <br /> Bromochloromethane 98 98 55-138 0 30 <br /> 1,1,1-Trichloroethane 111 111 81-142 0 30 <br /> Carbon Tetrachloride 111 112 79-155 1 30 <br /> 1,1-Dichloropropene 107 109 86-134 1 30 <br /> Benzene 102 103 83-128 1 30 <br /> 1,2-Dichloroethane 107 106 70-143 1 30 <br /> Trichloroethene 101 103 83-136 3 30 <br /> 1,2-Dichloropropane 99 99 83-129 0 30 <br /> Dibromomethane 101 103 82-128 2 30 <br /> Bromodichloromethane 106 106 80-129 0 30 <br /> Toluene 99 101 83-127 3 30 <br /> 1,1,2-Trichloroethane 95 97 77-125 1 30 <br /> Tetrachloroethene 97 97 78-133 0 30 <br /> 1,3-Dichloropropane 97 100 82-121 3 30 <br /> Dibromochloromethane 101 103 82-119 2 30 <br /> 1,2-Dibromoethane 98 99 78-120 1 30 <br /> Chlorobenzene 99 101 83-120 2 30 <br /> 1,1,1,2-Tetrachloroethane 100 101 83-119 1 30 <br /> Ethylbenzene 103 105 82-129 2 30 <br /> m+p-Xylene 100 102 82-130 2 30 <br /> o-Xylene 101 102 82-130 1 30 <br /> Styrene 97 98 76-126 2 30 <br /> Bromoform 95 97 64-119 2 30 <br /> Isopropylbenzene 104 107 81-130 2 30 <br /> 1,1,2,2-Tetrachloroethane 95 95 69-126 0 30 <br /> Bromobenzene 100 98 83-121 2 30 <br /> 1,2,3-Trichloropropane 101 99 73-125 2 30 <br /> n-Propylbenzene 105 105 78-131 1 30 <br /> 2-Chlorotoluene 101 100 78-121 1 30 <br /> 1,3,5-Trimethylbenzene 104 103 77-124 0 30 <br /> 4-Chlorotoluene 100 100 81-123 0 30 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> *The background result was more than four times the spike added <br />