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COU <br /> LAB 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 /> OG Type Description Reag Code Lab iD Dilution Factor Hate Time <br /> LCS Laboratory Control Sample 09062503 06/29/1999 2114 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 49 55 50 99 1 39-150 <br /> thylbenzene 48 84 50 97 7 32-160 <br /> ethyl-t-Butyl Ether (MTBE) 224 75 250 89 9 50-150 <br /> Toluene 49 65 50 99 3 46-148 <br /> ylenes (total) 143 53 150 95 7 75-125 <br /> LCD :1 Laboratory Control Sample Duplicate 09062503 06/29/1999 2140 <br /> Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 49 01 49 55 50 98 0 39-150 <br /> 1 1 20 <br /> thylbenzene 48 30 48 84 50 96 6 32-160 <br /> 1 1 20 <br /> ethyl-t-Butyl Ether (MTBE) 223 23 224 75 250 89 3 50-150 <br /> 0 7 25 <br /> Toluene 49 31 49 65 50 98 6 46-148 <br /> 0 7 20 <br /> 1&es (total) 142 79 143 53 150 95 2 75-125 <br /> 0 5 20 <br /> MS Matrix Spike 09062503 991124-10 06/30/1999 0910 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 50 94 50 0 00 101 9 _ 39-150 <br /> thylbenzene 46 44 50 0 00 92 9 32-160 <br /> ethyl-t-Butyl Ether (MTBE) 262 41 250 0 00 105 0 50-150, <br /> Toluene 49 97 50 0 00 99 9 46-148 <br /> jLyleoes (total) 136 67 150 0 00 91 1 75-125 <br /> Matrix Spike Duplicate 09062503 991124-10 06/30/1999 1723 <br /> . Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene T 50 81 50 94 50 a 00 101 6 39-150 <br /> 0 20 <br /> thylbenzene 50.08 46 44 50 0 00 100 2 32-160 <br /> 8 20 <br /> ethyl-t-Butyl Ether (MTBE) 231 33 262 41 250 0 00 92 5 50-150 <br /> 13 25 <br /> 1 Toluene 50 83 49 97 50 0 00 101 7 46-148 <br /> 2 20 <br /> ylenes (total) (46,90 136 67 150 0 00 97 9 75-125 <br /> 7 20 <br /> I t <br /> I � I <br /> I <br /> II Page 15 1 I I II <br /> * %=% REC, R=RPD, A=ABS Diff , D=% Diff <br /> 1 1 Tlw IBInelyliCel rgtAla opmons w nle prelal tln9 CMI.wn tM report a e basetl upon of-1101 aM meterat aupplie0 by the Giem Wwrwse exclu slue an0-.1-1 al uea tMs rspon not been ma0e t.aryNt rat lewlls ppnpna or Inlerprela Mons <br /> I I II I I'I expra55¢p apr.ser'1 Ino bHel,uQprnpyl of Cae i abardlorMe Care I�bpral orbs twweve maNee no wamHntY ar repmanl.l on erp esa Or mpNetl of enY type and a pressty tl aclams aame is to the o ptlucN ly proper opeelipns rn profilabtalH.a W I I i ' <br /> 1 I <br /> I ani�qae COY 01 Othe.imar0l❑operty well o santl m ponnecllm wlln wh On Bath repol is uH00 o ISNea upon Ip dnY IBdSan whetspevp The span endo nal ne eorotluceO m»nob a n pen vriroul the wrnen apo oral U co a Lehpretaya I <br /> II I I 11 I I I I i I 111, I I III <br />