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AlLancaster <br /> Laboratories Analysis Report <br /> 2425 New Hoiland Poke PO Box 12425 Lancaster PA 17605-2425•717-656.2300 Fax 717-656-2681•www IaMasterlabs c1Dr11 <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 917507 <br /> Reported 11/02/04 at 03 43 PM <br /> Sample Matrix Quality Control <br /> Ms MSD MS/MSD RPD BRa DUP Dt7P DuP RPT] <br /> Analysis Name $AHC REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 304300A07A Sample number(s) 4385218 <br /> TPH-GR <br /> 0 - Waters 124 63-154 <br /> Batch number 0430OA07B Sample number(s) 4385219 <br /> TPH-GRO - Waters 124 63-154 <br /> Batch number Z043032AA Sample number(s) 4385216-4385219 <br /> Ethanol 76 102 33-153 29 30 <br /> Methyl Tertiary Butyl Ether 87 89 69-134 2 30 <br /> di-Isopropyl ether 91 91 75-130 0 30 <br /> Ethyl t-butyl ether 90 90 78-119 0 30 <br /> t-Amyl methyl ether 89 89 77-117 0 30 <br /> t-Butyl alcohol 77 81 51-147 5 30 <br /> Benzene 94 93 83-128 1 30 <br /> 1,2-aichloroethane 92 90 73-136 2 30 <br /> Toluene 92 90 83-127 2 30 <br /> 1,2-Dibromoethane 91 91 78-120 0 30 <br /> Ethylbenzene 93 91 82-129 1 30 <br /> Xylene (Total) 42• 39* 82-130 9 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04299AOBD <br /> Trifluorotoluene-F <br /> 4385216 101 <br /> Blank 98 <br /> LCS 117 <br /> LCSD 110 <br /> MS 100 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04299A0EE <br /> Trifluorotoluene-F <br /> 4385217 100 <br /> Blank 101 <br /> LICS 117 <br /> LCSD 110 <br /> MS 100 <br /> Limits 57-146 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 043000010A <br /> Acetone <br /> 4385217 110 <br /> '-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br />