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Lancaster Laboratories <br /> Where quality is a science <br /> Page ] of 2 • <br /> Quality Control Summary <br /> Client Mame ChevronTexaco Group Number 827767 <br /> Reported 11/04/02 at 06 32 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result IDL Units %REC $REC Limits RPD RPD Max <br /> Batch number 02296A16A Sample number(s) 3924121-3924123 <br /> TPH-GRO - Waters N D 50 ug/l 102 104 74-116 1 30 <br /> Batch number 02297A53A- - Sample number(s) 3924124 - <br /> TPH-GRO - Waters N D 50 ug/1 87 92 74-116 6 30 <br /> Batch number P023031AA Sample number(s) 3924121-3924124 <br /> Methyl t-butyl ether N D 5 ug/1 93 91 77-127 2 30 <br /> Benzene N D 5 ug/l 92 91 85-117 1 30 <br /> Toluene N D 5 ug/1 97 100 85-115 2 30 <br /> Ethylbenzene N D 5 ug/1 100 100 82-119 0 30 <br /> Xylene (Total) N D 5 ug/l 98 98 84-120 0 30 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> Analysis Name RPD <br /> REC $REC Limits RPD MAX Conc Cone RPD Max <br /> Batch number 02296A16A Sample number{s) 3924121-3924123 <br /> TPH-GRO - Waters 122 74-132 • <br /> Batch number 02297A53A Sample number(s) 3924124 <br /> TPH-GRO - Waters 104 74-132 <br /> Batch number P023031AA Sample number(s) 3924121-3924124 <br /> Methyl t-butyl ether 96 96 69-134 0 30 <br /> Benzene 98 101 78-134 3 30 <br /> Toluene 103 102 83-127 1 30 <br /> Ethylbenzene 104 107 82-134 3 30 <br /> Xylene (Total) 101 103 82-130 2 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 02296A16A <br /> Trifluorotoluene-F <br /> 3924121 113 <br /> 3924122 112 <br /> 3924123 98 <br /> Blank 109 <br /> LCS 104 <br /> LCSD 127 <br /> MS 125 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 02297A53A <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 /> M E M B E R 2425 New Holland Pike <br /> Box 12425 <br /> La <br /> A � r Lancaster PAA <br /> 17605 2425 <br /> 717 656-2300 fax 717 656 2681 2216 Rev 9111/00 <br />