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r <br /> • • orV <br /> 1,Ilk <br /> Lancaster <br /> Laboratories • <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexacoGroup Number 838417 , - <br /> Reported 0]./31/03 at Oi 4B PM ' <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name - $REC REC Limits RPD - MAX Conc Conc RPD Max <br /> Batch number 03021A07C Sample number(s) 3980783-3980784,3980786,3980789-3980790 <br /> TPH-GRO - Waters 112 107 74-132 5 30 <br /> Batch number P030261AA Sample number(s) 3980782-3980787 <br /> Methyl Tertiary Butyl Ether 110 110 69-134 0 30 <br /> Benzene 116 115 78-134 0 30 <br /> Toluene 112 111 83-127 1 30 <br /> Ethylbenzene 113 112 62-134 1 30 <br /> Xylene (Total) 117 115 82-130 1 30 <br /> Batch number P030271AA Sample number(s) 3980788-3980791 <br /> Ethanol 90 98 34-163 8 30 <br /> Methyl Tertiary Butyl Ether (2) (2) 69-134 1 30 <br /> di-Isopropyl ether 102 105 68-133 3 30 <br /> Ethyl t-butyl ether 107 106 73-123 1 30 <br /> t-Amyl methyl ether 114 112 69-118 0 30 <br /> t-Butyl alcohol 104 110 51-148 2 30 <br /> Benzene 114 114 78-134 0 30 <br /> 1,2-Dichloroethane 105 106 _ 73-136 0 30 _ <br /> Toluene 112 108 83-127 3 30 . <br /> 1,2-Dibromoethane 110 111 78-120 0 30 <br /> Ethylbenzene 115 114 82-134 1 30 <br /> Xylene (Total) 117 117 82-130 0 30 <br /> =Surrogate-Quality-Control- _- <br /> _Analysis Name Methanol and Et_hanolt___ <br /> Batch number 030200000A- <br /> Acetone <br /> ' 3980790 _—_ 99 - -- - - -- -- - - - - - <br /> 3980791 100 <br /> Blank 98 <br /> LCS 96 <br /> MS 97 <br /> MSD 95 <br /> Limits 72-128 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0302OA07B <br /> Trifluorotoluene-F ` <br /> 3980782 86 <br /> Blank 93 <br /> JCS_ _ 1_10 rn - <br /> LCSD 110 <br /> MS 113 <br /> Limits 57-146 <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 Mt <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster PA 17605-2425 <br /> 717-656 2300 Fax 717 656 2681 221A Rau 1nlJff2 <br />