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�r L <br /> Lancasterori <br /> Laboratories An a l ysis Re p <br /> 2425 New Hotland Pike PO Box 12425 Lancaster PA 17605.2425 717 656 2300 Fax 717-656-2681 WWW 18nCasterlabS COM <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco c/o Cambria Group Number 929502 <br /> Reported 02/07/05 at 03 05 PM <br /> MS MSD MS/MSD RPD BKG Dt1P DVT Dup RPD <br /> Analysis--Name %RHC %RSC Lxmsts RPD MAX Conc Conc RPD Max <br /> Batch number 050260027A sample number(B) 4453484-4453486 <br /> Methanol (by Direct Injection) 104 100 68-130 4 20 <br /> Batch number 05029AO8B Sample number(s) 4453483-4453486 <br /> TPH-GRO - Waters 121 63-154 <br /> Batch number Z050311AA Sample number($) 4453484-4453485 <br /> Ethanol 96 88 33-153 8 30 <br /> Methyl Tertiary Butyl Ether 105 105 69-134 0 30 <br /> di-Isopropyl ether 103 103 75-130 1 30 <br /> Ethyl t-butyl ether 106 107 78-119 1 30 <br /> t-Amyl methyl ether 107 107 77-117 0 30 <br /> t-Butyl alcohol 101 102 51-147 1 30 <br /> Benzene 110 110 83-128 1 30 <br /> 1,2-D:Lchloroethane 109 111 73-136 2 30 <br /> Toluene 113 112 83-127 1 30 <br /> 1 2-Dibromoethane 105 103 78-120 2 30 <br /> Ethylbenzene 114 114 82-129 0 30 <br /> Xylene (Total) 113 113 82-130 0 30 <br /> 0otch number Z050314AA Sample number(s) 4453483 <br /> thyl Tertiary Butyl Ether 99 99 69-134 0 30 <br /> nzene 101 301 83-128 0 30 <br /> luene 105 107 B3-127 2 30 <br /> Ethylbenzene 106 109 82-129 1 30 <br /> Xylene (Total) 106 107 82-130 1 30 <br /> Batch number Z050381AA sample number(s) 4453486 <br /> Ethanol 84 78 33-153 8 30 <br /> Methyl Tertiary Butyl Ether 96 95 69-134 1 30 <br /> dx-Isopropyl ether 77 76 75-130 1 30 <br /> Ethyl t-butyl ether 91 89 78-119 1 30 <br /> t-Amyl methyl ether 104 102 77-117 2 30 <br /> t-Butyl alcohol 99 97 51-147 2 30 <br /> Benzene 100 99 83-128 1 30 <br /> 1,2-Dichloroethane 99 99 73-136 1 30 <br /> Toluene 102 102 83-127 1 30 <br /> 1 2-Dibromoethane 97 98 78-120 1 30 <br /> Ethylbenzene 102 102 82-129 1 30 <br /> Xylene (Total) 106 105 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name Methanol and Ethanol <br /> Batch number 050260027A <br /> Acetone <br /> 4453484 101 <br /> 4453485 97 <br /> 4453486 190 <br /> Blank 97 <br /> LCS 99 <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 />