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i <br /> COULAB CORE LABORATORIES <br /> 1 <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 991124 Report Date 06/30/1999 <br /> CUSTOMER IT Group PROJECT* Southland - Martinez ATTN• Shelby Lathrop <br /> 01—f Type Description Reag Code Lab ID Dilution Factor Date Time <br /> Test Method EPA 8260B Batch. 6870 Analyst gfb <br /> Method Description Volatile Organics by GC/MS Units ug/L <br /> MS Matrix Spike 09051803 990876-23 05/24/1999 1411 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> ert-Butyl Alcohol (TBA) 998 53 1000 000000 0 99 9 _ 48-194 <br /> i-Isopropyl Ether 50 76 50 000000 0 101 5 53-149 <br /> Ill tert-Butyl Ether (ETBE) 48 23 50 000000 0 96 5 53-148 <br /> ert-Amyl Methyl Ether 48 91 50 000000 0 97 8 49-158 <br /> Methyl-t-Butyl Ether (MTBE) 84 31 100 000000 0 83 83 5 44-190 <br /> 1,2-Dichloroethane 8 13 10 000000 0 81 3 70-130 <br /> ,2-Dibromoethane (EDB) 9 14 10 000000 0 91 4 70-130 <br /> MSD Matrix Spike Duplicate 09051803 990876-23 05/24/1999 1440 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1245 59 998 53 1000 000000 0 124 6 48-194 <br /> 22 21 Y <br /> opropyl Ether 54 09 50 76 50 000000 0 108 2 53-149 <br /> 6 15 <br /> l tert-Butyl Ether (ETBE) 54 95 48 23 50 000000 0 109 9 53-148 <br /> 13 28 <br /> lell Methyl Ether 56 24 48 91 50 000000 0 112 5 49-158 <br /> 14 48 <br /> ethyl-t-Butyt Ether (MTBE) 108 96 84 31 100 000000 0 83 108 1 44-190 <br /> 26 21 Y <br /> 1 <br /> 2-Dichloroethane 9 84 8 13 10 000000 0 98 4 70-130 <br /> 19 30 <br /> ,2-Dibromoethane (EDB) 10 35 9 14 10 000000 0 103 5 70-130 <br /> 12 30 <br /> MS Matrix Spike 09051803 990881-3 05/25/1999 1130 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> art-Butyl Alcohol (TEA) 942 52 1000 000000 0 94 3 34-182 <br /> i-Isopropyl Ether 46 10 50 000000 0 92 2 60-131 <br /> Ethyl tert-Butyl Ether (ETBE) 45 41 50 000000 0 90 8 64-138 <br /> 0ert-Amyl Methyl Ether 47 71 50 000000 0 95 4 67-154 <br /> ethyl-t-Butyl Ether (MTBE) 98 48 100 000000 0 1 98 5 71-142 <br /> ,2-Dichloroethane 10 43 10 000000 0 104 3 70-130 <br /> .2-Dibromoethane (EDB) 10 18 10 000000 0 101 8 70-130 <br /> MSD I! Matrtx Spike Duplicate 09051803 990881-3 05/25/1999 1359 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result Limits F <br /> ert-Butyl Alcohol (TBA) 1083 56 942 52 1000 000000 0 108 4 34-182 <br /> ' 14 19 <br /> t1-IsopropyliEther 51 68 46 10 50 000000 0 103 4 60-131 <br /> 11 24i <br /> I , <br /> Page 16 I <br /> * Y=Y REC, R=RPD, A=ABS Diff D=YIDiff EI I <br /> eruYytrcel resuRe pprwns p plain BtaGUrr Coat atnetl n It09 repptl e e G09e0 upon nlwmatbn antl materal supplied W the Grenl Nr wIg50 eaCLsive antl Cent tlen4al arae thea repprl tas beam mecb The anatYaical raqulig solo ons d mte preta twos , <br /> l <br />'� l'I eaaregsnd epraeern tare oast,utlgmenl at CPte I,abPratares Care uop atptles npwe.�er ntel�ea no wa rainy w rao-nentancn awes a mpied M am type ono a wegxv a acw ms smne as tp the prpauctmty proper olrerat ons w Wauteblanegg of ' ' <br /> e!ry pl gas cPet w prior m-1 property rreX or sary n donnectron w ih v.MU wPh eporl­W01 9r aaonI The repwl dull not be reprod0cetl-1-Pr n pat vathPra iha w tten epppval of Ca a Leharpt Dose I I I I tl <br /> h <br />