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COULABCORE LABORATORIES <br />' 0 UAL I 7 Y C O N F R O L R E S U L T S <br /> Job Number 990890 Report Date 05/26/1999 <br /> CUSTOMER: tT Group PROJECT: Southland - Martinez ATTR Shelby Lathrop <br /> OC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD Matrix Spike Duplicate 09051803 99087623 05/24/1999 1440 <br /> Parameter/Test Description @C Result DC Result True Value Orig Value Calc Result * Limits <br /> tert-Butyl Alcohol (TBA) 1245 59 998 53 1000 000000 0 124 6 70-130 <br /> 22 30 <br /> Di-isopropyl Ether 54 09 50 76 50 000000 0 108 2 70-130 <br /> 6 30 <br /> Ethyl tert-Butyl Ether (ETRE) 54 95 48 23 50 000000 0 109 9 70-130 <br /> 13 30 <br /> Itert-AnTyl Methyl Ether 56 24 48 91 50 000000 0 112 5 70-130 <br /> 14 30 <br /> ,Methyl-t-Butyt Ether (MTBE) 108 96 84 31 100 000000 0 83 108 1 70-130 <br /> 26 30 <br /> 1,2-Dichloroethane 9 84 8 13 10 000000 0 98 4 70-130 <br /> 19 30 <br /> 1,2-Dibromoethane (EDB) 10 35 9 14 10 000000 0 103 5 70-130 <br /> 12 30 <br /> MS Matrix Spike 09051803 990876-35 05/24/1999 1948 <br /> Parameter/Test Description 4C Result QC Result True Value Orig Value Calc Result * Limits <br /> tert-Butyl Alcohol (TBA) 1211 31 1000 000000 0 121 1 70-130 <br /> Di-Isopropyl Ether 56 38 50 000000 0 112 8 70-130 <br /> �Ethyl tent-Butyl Ether (ETRE) 55 88 50 000000 0 111 8 70-130 <br /> tert-Amyl Methyl Ether 56 48 50 000000 0 113 0 70-130 <br /> Methyl-t-Butyl Ether (MTBE) 147 79 100 000000 15 63 132 2 70-130 <br /> 1,2-Dichloroethane 12 22 10 000000 0 122 2 70-130 <br /> ,1,2-D,bromoethane (EDB) 11 46 10 000000 0 114 6 70-130 <br /> MSD Matrix spike Duplicate 09051803 990876-35 05/24/1999 2016 <br /> Parameter/Test Description OC Result 4C Result True Value Orig Value Calc Result * Limits <br /> 'tent-Butyl Atcohot (TBA) 1129 60 1211 31 1000 000000 0 113 0 W 70-130 <br /> 7 30 <br /> ,Dl-lsopropyl Ether 55 53 56 38 50 000000 0 111 1 70-130 <br /> 2 30 <br /> Ethyl tert-Butyl Ether (ETBE) 54 93 55 88 50 000000 0 109 9 70-130 <br /> 2 30 <br /> tert-Amyl Methyl Ether 54 46 56 48 50 000000 0 108 9 70-130 <br /> 4 30 <br /> IM ethyl-t-Butyl Ether (MTBE) 134 80 147 79 100 000000 15 63 119 2 70-130 <br /> 9 30 <br /> 1,2-Dichloroethane 11 32 12 22 10 000000 0 113 2 70-130 <br /> B 30 <br /> ,1,2-Dibromoethane (EDB) 10 68 11 46 10 000000 0 106 8 70-130 <br /> 7 30 <br /> Page 9 <br /> * %_% REC, R=RPD, A=ABS Diff D=% Diff <br /> lY N[cal os 9 c o ) l i 1 '1 1 1 Iq g b y G Oo Iw on atd^1 1> . )y ml o f c 5 x Iso i i t t I n 3 iwiyl )I lus p of nso a lil ons <br /> r iy 1 s)1) Coslrl 3 ii i IGPL3 1 1 tc)('�nL Lr 1 w how u[ s)fC 1 4 Iola 45 l Ii I,i nl 1 )It 1 1 Ic wl a vs� Ci [V I tl ul (Illi o n ;ass al <br /> )A c tlln w 1[wl Ch shI 1 �111 w 11 I Cr q41 <br />