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Lancaster Laboratories Page 2 of 4 <br /> • Wherequality is a science. <br /> Qaulity Control Summary <br /> Client Name: Chevron Products Company Group Number: 807478 <br />' Reported: 05/29/02 at 08:02 PM <br /> Sample Matrix Quality Control <br /> MS NSD NS/MSD RPD BKG DUP DUP Dup <br /> RPD <br />' Analysis Name %REC %REC Limits RPD MAX Cone Conc RPD Max <br /> Batch number: 02135A55B Sample number(s) : 3819661-3619667 <br /> TPH-GRO - Waters 97 109 74-132 12 30 <br /> Batch number: 021370007A Sample number's) ; 3819661-3819663 <br /> Methanol (by Direct Injection) 108 104 58-137 4 20 <br /> Batch number: 021410027A Sample number(s) : 3819664,3819666-3819667 <br /> Methanol (by Direct Injection) 100 104 58-137 4 20 <br />' Batch number: U021361AA Sample number(s) : 3819661 <br /> Ethanol 108 109 70-130 2 30 <br /> Methyl t-butyl ether (2) (2) 69-134 1 30 <br /> di-Isopropyl ether 98 99 68-133 1 30 <br /> Ethyl t-butyl ether 99 101 73-123 2 30 <br /> t-Amyl methyl ether 106 106 69-118 0 30 <br /> t-Butyl alcohol 94 97 51-148 4 30 <br /> Benzene 105 106 78-134 1 30 <br /> 1,2-Dichloroethane 101 104 75-141 3 30 <br /> Toluene 102 104 76-133 2 30 <br /> 1,2-Dibromoethane 96 100 78-120 4 30 <br /> Ethylbenzene 104 105 82-134 1 30 <br /> Xylene (Total) 105 105 81-136 1 30 <br /> Batch number: U021361AB Sample number(s) : 3819662-3819663,3819665 <br /> thanol 108 109 70-130 2 30 <br /> thyl t-butyl ether (2) (2) 69-134 1 30 <br />' -Isopropyl ether 98 99 68-133 1 30 <br /> Ethyl t-butyl ether 99 101 73-123 2 30 <br /> t-Amyl methyl ether 106 106 69-118 0 30 <br /> t-Butyl alcohol 94 97 51-148 4 30 <br /> Benzene 105 106 7B-134 1 30 <br /> 1,2-Dichloroethane 101 104 75-141 3 30 <br /> Toluene 102 104 78-133 2 30 <br /> 1,2-Dibromoethane 96 100 78-120 4 30 <br /> Ethylbenzene 104 105 82-134 1 30 <br /> Xylene (Total) 105 105 81-136 1 30 <br /> Batch number: U021361AC Sample number(s) ; 3819663-3819664,3819666-3819667 <br /> Ethanol 108 109 70-130 2 30 <br /> Methyl t-butyl ether (2) (2) 69-134 1 30 <br /> di-Isopropyl ether 98 99 68-133 1 30 <br /> Ethyl t-butyl ether 99 101 73-123 2 30 <br /> t-Amyl methyl ether 106 106 69-118 0 30 <br /> t-Butyl alcohol 94 97 51-148 4 30 <br /> Benzene 105 106 78-134 1 30 <br /> 1,2-Dichloroethane 101 104 75-141 3 30 <br /> Toluene 102 104 78-133 2 30 <br /> 1,2-Dibromoethane 96 100 78-120 4 30 <br /> Ethylbenzene 104 105 82-134 1 30 <br /> Xylene (Total) 105 105 81-136 1 30 <br /> ISurrogate Quality Control <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 0213SA55B <br /> Trifluorotoluene-F <br /> *-Outside of specification <br /> 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 /> Lancaster Laboratories,Inc. <br /> M E PIE 8 E Fa 2425 New Holland Pike <br /> Box 12425 <br /> La <br /> � Lancaster,PA 17605-2425 <br /> 717-656.2300 Fax:717-656-2681 2216 Rev.9111/00 <br />