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Lancaster Laboratories Page 1 of 3 <br /> Where qualltyis a srrence <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 807990 <br /> Reported 05/29/02 at 08 43 AM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC %REC Limits RPD RPD Max <br /> Batch number 02134A33D Sample number(s) 3821846-3821848 <br /> TPH-GRO - Soils N D 1 mg/kg 99 75-117 <br /> Batch number 02137A33C Sample number(s) 3821830-3821839 <br /> TPH-GRO - Soils N D 1 mg/kg 95 75-117 <br /> Hatch number 02137A33D Sample number(s) 3821840-3821845 <br /> TPH-GRO - Soils N D 1 mg/kg 95 75-117 <br /> Batch number D021401AB Sample number(s) 3821830-3821835 <br /> Methyl t-butyl ether N D 1 ug/kg 110 75-135 <br /> Benzene N D 1 ug/kg 94 85-125 <br /> Toluene N D 1 ug/kg 85 84-125 <br /> Ethylbenzene N D 1 ug/kg 88 86-127 <br /> Xylene (Total) N D 1 ug/kg 91 87-127 <br /> Batch number D021411AA Sample number(s) 3821836 <br /> Methyl t-butyl ether N D 1 ug/kg 127 75-135 <br /> Benzene N D 1 ug/kg 101 85-125 <br /> Toluene N D 1 ug/kg 91 84-125 <br /> Ethylbenzene N D 1 ug/kg 96 86-127 <br /> Xylene (Total) N D 1 ug/kg 95 87-127 <br /> Batch number D021411AB Sample number(s) 3821837-3821848 <br /> W-luene <br /> thyl t-butyl ether N D 1 ug/kg 127 75-135 <br /> nzene N D 1 ug/kg 101 85-125 <br /> N D 1 ug/kg 91 84-125 <br /> Ethylbenzene N D 1 ug/kg 96 86-127 <br /> Xylene (Total) N D 1 ug/kg 95 87-127 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analyaia Name %REC %REC Limits RPD MAX Cone Cone RPD Max <br /> Batch number 02134A33D Sample number(s) 3821846-3821848 <br /> TPH-GRO - Soils 71 79 44-116 10 30 <br /> Batch number 02137A33C Sample number(s) 3821830-3821839 <br /> TPH-GRO - Soils 77 77 44-116 0 30 <br /> Batch number 02137A33D Sample number(s) 3821840-3821845 <br /> TPH-GRO - Soils 77 77 44-116 0 30 <br /> Batch number D021401AB Sample number(8) 3821830-3821835 <br /> Methyl t-butyl ether 107 96 52-150 11 30 <br /> Benzene 87 90 43-151 3 30 <br /> Toluene 79 85 27-163 7 30 <br /> Ethylbenzene 84 90 30-158 7 30 <br /> Xylene (Total) 86 89 46-158 4 30 <br /> Batch number D021411AA Sample number(s) 3821836 <br /> Methyl t-butyl ether 120 102 52-150 16 30 <br /> Benzene 95 93 43-151 2 30 <br /> Toluene 92 93 27-163 0 30 <br /> Ethylbenzene 101 101 30-158 1 30 <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 /> Lancaster Laboratories Inc <br /> M E M 6=- p 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster PA 17605 2425 <br /> 717 656 2300 Far 717 656 2681 2216 Rev 9111/00 <br />