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A <br /> Lancaster <br /> Laboratories i <br /> Page 2 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 839185 <br /> Reported 02/12/03 at 02 58 PM <br /> MS MSD MS/MSD RPD BRG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 0302SA07C Sample number(s) 3984038 <br /> TPH-GRO - Waters 114 74-132 <br /> Batch number 03028A07C Sample number(B) 3984039 <br /> TPH-GRO - Waters 110 74-132 <br /> Batch number 0302BA53A Sample number(s) 3984040-3984042,3984044-3984048 <br /> TPH-GRO - Waters 116 74-132 <br /> Batch number 0302BA53B Sample number(s) 3984043 <br /> TPH-GRO - Waters 116 74-7.32 <br /> Batch number N030291AA Sample number(s) 3984048 <br /> Ethanol 118 120 34-163 2 30 <br /> Methyl Tertiary Butyl Ether 96 98 69-134 1 30 <br /> di-lsopropyl ether 104 105 68-133 2 30 <br /> Ethyl t-butyl ether 95 98 73-123 3 30 <br /> t-Amyl methyl ether 97 99 69-118 2 30 • <br /> t-Butyl alcohol 108 111 51-148 3 30 <br /> Benzene 104 105 78-134 0 30 <br /> Toluene Ill 113 83-127 2 30 <br /> Ethylbenzene 86 75* 82-134 4 30 <br /> Xylene (Total) 108 105 82-130 2 30 <br /> Batch number P030301AA Sample number(s) 3984038-3984047 <br /> Ethanol 90 89 34-163 1 30 <br /> Methyl Tertiary Butyl Ether (2) (2) 69-134 0 30 <br /> di-Isopropyl ether 104 101 68-133 3 30 <br /> Ethyl t-butyl ether 107 105 73-123 2 30 <br /> t-Amyl methyl ether 110 108 69-118 2 30 <br /> t-Butyl alcohol 107 1G7 51-148 0 30 <br /> Benzene 116 114 78-134 1 30 <br /> Toluene 114 112 83-127 2 30 <br /> Ethylbenzene 113 111 82-134 2 30 <br /> Xylene (Total) 112 112 82-130 0 30 <br /> Batch number P030311AA Sample numbers) 3984043 <br /> Benzene 116 116 75-134 0 30 <br /> Ethylbenzene 112 113 82-134 0 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <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 /> Lancaster Laboratories Inc <br /> FA IE M B IE R 2425 New Holland Pike <br /> PO Sox 12425 <br /> A Lancaster PA 17605 2425 <br /> 717 656 2300 Fax 717 656-2681 ��u Rn„ innrm <br />