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r <br /> OULAB CORE LABORATORIES <br /> Q U A L I T Y C 0 N T R 0 L R E S U L T S <br /> Job Number 991123 Report Date 06/30/1999 <br /> CUSTOMER* IT Group PROJECT* SouthLand - Martinez ATTN Shelby Lathrop <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> LCS Laboratory Control Sample 09060402 06/23/1999 1049 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> ethyl-t-Butyl Ether (MTBE) 81 21 100 000000 81 2 _ 33-169 <br /> ,2-Dichloroethane 9 71 10 000000 97 1 70-130 <br /> 1,2-Dibromoethane (EDB) 8 41 10 000000 84 1 70-130 <br /> M8 Method Blank 06/23/1999 1118 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value CaLc Result * Limits F <br /> ert-Butyl Alcohol (TBA) 0 <br /> i-Isopropyl Ether 0 <br /> Ethyl tert-Butyl Ether (ETBE) 0 <br /> rt-Amyl Methyl Ether 0 <br /> 1e2-DichLoroethane <br /> thyL-t-Butyl Ether (MTBE) 0 <br /> 0 ` <br /> 1,2-Dibromoethane (EDB) 0 <br /> MatriX Spike 09060402 991125-9 06/23/1999 1758 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> don <br /> ert-Butyl Alcohol (TBA) 1470 93 1000 000000 0 147 1 48-194 <br /> i-Isopropyl Ether 39 51 50 000000 0 79 0 53-149 <br /> Ethyl tert-Butyl Ether (ETBE) 43 04 50 000000 0 86 1 53-148 <br /> tert-Amyl Methyl Ether 44 16 50 000000 0 88 3 49-158 <br /> tthyL-t-Butyl Ether (MTBE) 127 87 100 000000 57 03 70 8 44-190 <br /> 2-DichLoroethane 9 70 10 000000 0 97 0 70-130 <br /> ,2-Dibromoethane (EDB) 7 93 10 000000 0 79 3 70-130 <br /> MSD Matrix Spike Duplicate 09060402 991125-9 06/23/1999 1826 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> t1sopropyl <br /> t-Butyl Alcohol (TBA) 1421 50 1470 93 1000 000000 0 142 2 _ 48-194 <br /> 3 21 <br /> Ether 40 56 39 51 50 000000 0 81 1 53-149 <br /> 3 15 <br /> hyt tert-Butyl Ether (ETBE) 44 71 43 04 50 000000 0 89 4 53-148 <br /> 4 28 <br /> rt-Amyl Methyl Ether 45 38 44 16 50 000000 0 90 8 49-158 <br /> 3 48 <br /> Methyl-t-Butyl Ether (MTBE) 144 36 127 87 100 000000 57 03 87 3 44-190 <br /> 12 21 <br /> ,2-Dichloroethane 10 32 9 70 10 000000 0 103 2 70-130 <br /> 6 30 <br /> 1,2-Dibromoethane (EDB) 8 36 7 93 10 000000 0 83 6 70-130 <br /> 5 30 <br /> r <br /> Page 21 <br /> * %=% REC, R=RPD, A=ABS Diff , D=% Diff <br /> The Bn.eyix;au esulls OfYn on p inlerP el al ons contunetl n the aFOrl a e be5etl uPn�niwma[Pn ano man al spot ed PV the.Np efss r whose a clams»antl ccnlNlenlxtl use Ilya rOWrt has been—I TFp anaiyncal resJts PPiM1Ms o nlerPr0la Igns <br /> gspessed a nsgnt inn hest Ndq-t PI Core ldbaretd�0s Core Labarala a5 hpwe maNes no wa rants a repeaa�lanon a mpN00 of e�y type and e o e.sry dada ms same....the vPc—t,P open Ppnar Prts a Prpstehlen059 01 <br /> any al qa r,Pal 0 Ot^r m at PropprlY w 9 o1 sa d n co—I on—1h wn ch s tch I—rt i5 psW a reF�'tl pPpn IW any aa9pn wni{;p0uq Tn S opni 9nan npl eB nP W.e n W. oo W pf Co a La[wra en05 <br />