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1 � <br /> I <br /> (OU <br /> LAR 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 /> kM--S <br /> Matrix Spike 09062503 991124-10 116/30/1999 Q910 <br /> Parameter/Test Description OC Result OC Result True Value Orig Value Calc Result * Limits F <br /> enzene 50 94 50 0 00 101 9 J 39-150 <br /> thylbenzene 46 44 50 0 00 92 9 32-160 <br /> Methyl-t-Butyl Ether (MTBE) 262 41 250 0 00 105 0 50-150 <br /> luene 49 97 50 0 00 99 9 46-148 <br /> Penes (total) 136 67 150 0 00 91 1 75-125 <br /> MSD Matrix Spike Duplicate 09062503 991124-10 06/30/1999 1723 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 50 81 50 94 50 0 00 101 6 39-150 ^ <br /> 0 20 <br /> 1thylbenzene 50 08 46 44 50 0 00 100 2 32-160 <br /> 8 20 <br /> Methyl-t-Butyl Ether (MTBE) 231 33 262 41 250 0 00 92 5 50-150 <br /> 13 25 <br /> 50 83 49 97 50 0 00 101 7 46-148 <br /> 2 20 <br /> tenes (total) 146 90 136 67 150 0 00 97 9 75-125 <br /> 7 20 <br /> Test Method EPA 8260E 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 OC Result QC Result True Value Orig Value Calc Result * Limits F <br /> rt-Butyl Alcohol (TBA) 998 53 1000 000000 0 99 9 48-194 <br /> -Isopropyl Ether 50 76 50 000000 0 101 5 53-149 <br /> Ethyl tert-Butyl Ether (ETBE) 48 23 50 000000 0 96 5 53-148 <br /> tert-Amyl Methyl Ether 48 91 50 000000 0 97 8 49-158 <br /> 9thyl-t-Butyl Ether (MTBE) 84 31 100 000000 0 83 83 5 44-190 <br /> 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 /> rt-Butyl Alcohol (TBA) 1245 59 998 53 1000 000000 0 124 6 48-194 <br /> 22 21 Y <br /> -Isopropyl Ether 54 09 50 76 50 000000 0 108 2 53-149 <br /> 6 15 <br /> hyt Cert-Butyl Ether (ETBE) 54 95 48 23 50 000000 0 109 9 53-148 <br /> 13 28 <br /> rt-Amyl Methyl Ether 56 24 48 91 50 000000 0 1.12 5 49 158 <br /> 14 48 <br /> A-t-Butyl Ether (MTBE) 108 96 84 31 100 000000 0 83 108 1 44-190 <br /> 26 21 Y <br /> Page 18 <br /> * Y=% REC, R=RPD, A=ABS Diff , D=% Diff <br /> me analytrel rasues pPWpns IX nI0r0 star ons contanetl itas report era hasetl uppn mlIXmalron entl mataral sppaed ay the rJeN}p wnpse a ctusrve am GpnLpeet of use ttvs rBOOrI Ns Oeasnto matlM <br /> e Tiq anafyt cai raeM!op eons a n1e•prala Irons <br /> e passed rapeaenl the pesl lodgment al Cps Labwarp as Gae LabwatIX ea howeear makes m warranty a ep aeenlalgn a prase or xnpNed of any type antl a preaary tl stJauns soma atpptluelmty Groper ops ahona M pptlehla055 0l <br /> any Ca gm Coal or otMr—1properly well w 5a�tl n WA-1 On-th—t,spch apart s used IX erred upm SIX am/reason whatsoever P w apo!ahaN—1 ba rapotlucatl ar wWt,,or n part w maul the—1w Opp,,al of Cora Laboretp e <br />