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s <br /> OfiLAB 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 Ii Group PROJECT* Southland - Martinez ATTN Shelby Lathrop <br /> OC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD Matrix Spike Duplicate 09051803 990876-23 05/24/1999 1440 <br /> Parameter/Test Description QC Result OC Result True Value Orig VaLue Calc Result * Limits F <br /> ,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 04051803 990881-3 05f25/1999 1130 <br /> LParameter/Test Description QC Result OC Result True Value Orig Value Calc Result * Limits F <br /> oFert-Butyl Alcohol (TBA) 942 52 1000 000000 0 94 3 34-182 <br /> Di-Isopropyl Ether 46 10 50 000000 0 92 2 60-131 <br /> thyL tert-Butyt Ether (ETRE) 45 41 50 000000 0 90 8 64-138 <br /> rt-Amyl Methyt Ether 47 71 50 000000 0 95 4 67-154 <br /> thyl-t-Butyl Ether (MTBE) 98 48 100 000000 0 98 5 71-142 <br /> 1,2-DichLoroethane 10 43 10 000000 0 104 3 70-130 <br /> 1, Dibromoethane (EDB) 10 18 10 000000 0 101 8 70-130 <br /> MSD Matrix Spike Duplicate 09051803 990881-3 05/25/1999 1159 <br /> . Parameter/Test Description QC Result QC Result True Value orig Value Calc Result * Limits F <br /> rt-Butyl Alcohol (TBA) 1083 56 942 52 1000 000000 0 108 4 34-182 <br /> 14 19 <br /> Di-Isopropyl Ether 51 68 46 10 50 000000 0 103 4 60-131 <br /> 11 24 <br /> hyl tert-Butyl Ether (ETRE) 51 04 45 41 50 000000 0 102 1 64-138 <br /> 12 29 <br /> tent-Amyl Methyl Ether 51 33 47 71 50 000000 0 102 7 67-154 <br /> 7 27 <br /> Ithyl-t-Butyl Ether (MTBE) 110 90 98 48 100 000000 0 110 9 71-142 <br /> 12 31 <br /> 1,2-Dichloroethane 10 98 10 43 10 000000 0 109 8 70-130 <br /> 5 30 <br /> 12-Dibromoethane (EDB) 10 24 10 18 10 000000 0 102 4 70-130 <br /> 1 30 <br /> MB Method Blank 06/Z2/1999 1516 <br /> Parameter/Test Description OC Result QC Result True VaLue Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 0 <br /> Isopropyl Ether 0 <br /> hyt tert-Butyl Ether (ETRE) 0 <br /> rt-AmyL Methyl Ether 0 <br /> MethyL-t-Butyl Ether (MTBE) 0 <br /> �2 DichLoroethane 0 <br /> 2-Dibromoethane (EDB) 0 <br /> ' Page 19 <br /> REC, R=RPD, A=ABS Diff D=% Diff <br /> Tna a�afytgde aayltS oMKW s M is P atef ons twnta.notl n td s repo I are b—d W W,n,t[M and mdta/181 aupPhad by IM1e clrenl Iv whpaa a clusrva eM eonlxlent al use to S 1*0d Isas been mdda la111111 tB5W15 b '—9'Ilar¢ela In s <br /> e p esSe6 ap+esenl Ibe best'.09- 11-1—Wo9—I qt Gde Labosetd es CO a Laboratnnes M1gwever makes rq we rant, rare—Wo express IX mphad of any IM,and eapuasly d scla ms same as t,the p,Wx W proper DW t—,Dt realfabl­sa OI <br /> any olh ga Dal d ptnn m yel p con ly wfllt Or santl drvnecl Dn w th wM1 ch such apol Is vsatl d rM-opoa fpr any Ths .—shall—ba epodu[5d in-N,D n Pa t w w tlen apprp al al Cde Lapp at0 res <br />