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i <br />�I <br /> 16 COULAB CORE LABORATORIES <br /> 0 U A L I T Y C O N T R O L R E S U L T S <br /> Job Number 991747 Report Date : 09/08/1999 <br /> 15TC <br /> ER, IT Group PROJECT. Southland - Martinez ATTN• So.h. Sutler <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD Matrix Spike Duplicate 09072801 991748-2 OWA/19W 0304 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 47.56 47 00 50 0 00 95.1 — 39-150 <br /> 1 20 <br /> Ethylbenzene 51 14 48 96 50 0 64 101 0 32-160 <br /> 4 20 <br /> ethyl-t-Butyi Ether (MTBE) 257 20 253 66 250 0.00 102 9 50-150 <br /> 1 25 <br /> Toluene 50 67 49 80 50 0 00 101 3 46-148 <br /> 2 20 <br /> 1yLenes (total) 159 18 153.67 150 4 11 103.4 75-125 <br /> 4 20 <br /> Test Method EPA 82608 Batch 8274 Analyst. gfb <br /> Method Description Volatile Organics by GC/MS Units ug/L <br /> Laboratory Control Sample 09082501 09/01/1999 1013 <br /> Parameter/Test Description QC Result QC Result True Value Orig. Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1248 41 1000 000000 124 8 37-175 <br /> t-Isopropyl Ether 54 58 50 000000 109 2 60-138 <br /> thyl tent-Butyl Ether (ETRE) 50 74 50 000000 101 5 51-143 <br /> ert-Amyl Methyl Ether 48 30 50 000000 96 6 64-137 <br /> Methyl-t-Butyl Ether (MTBE) 120 85 100 000000 120.8 33-169 <br /> ,2-Dichtoroethane 10 57 10 000000 105 7 70-130 <br /> ,2-Dibromoethane (EDB) 8 62 10 000000 86 2 70-130 <br /> MS �Met�hodBlank 09/01/1999 1041 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 0 <br /> tIsopropyL Ether 0 <br /> hyl tert-Butyl Ether (ETRE) 0 <br /> t-Amyl Methyl Ether 0 <br /> Methyl-t-Butyl Ether (MTBE) 0 <br /> 1,2-Dichloroethane 0 <br /> 2-Dibromoethane (EDB) 0 <br /> MS Matrix Spike 09082501 991745-6 09/0111999 1626 <br /> Parameter/Test Description 0C Result QC Result True Value Orig Value Calc Result * Limits F <br /> tent-Butyl Alcohol (TBA) 1395 31 1000 000000 0 139 5 34-182 <br /> Di-Isopropyl Ether 61 77 50 000000 0 123 5 60-131 <br /> Ethyl tert-Butyl Ether (ETRE) 54 58 50 000000 0 109.2 64-138 <br /> Wert-Amy <br /> rt-Amyl Methyl Ether 52 07 50 000000 0 104.1 67-154 <br /> L-t-Butyl Ether (MTBE) 160 85 100 000000 25 28 135.6 71-142 <br /> ichloroethane 10 94 10 000000 0 109 4 70-130 <br /> -Dibromaethane (EDB) 9 73 10.000000 0 97 3 70-130 <br /> Page 9 <br /> * K=X REC, R=RPD, A=ABS Diff., D=% Diff <br /> The enaMcel reavJls agmoru or mlerwelal�OfW oanlaawd xt Ihla report era —eC--dr i—Iha raowl hes been--T-eneF 1--1.-n—or."I—I.bane <br /> aspre-1 reoreaent the best luoU M t o1 Care I_abmalo Cora L Stpnes ho—r kee W wWanry or reproMltlabOn eWns or enplay 01,IYpe entl eapr ly 0 MISIM seMe-to the wotJuOtmty props o,-MOWS w omlitableneas 01 <br /> env 0 pea Coal or otlwr mew.a Property was 0 mW en eomeokon with"ch each rewn 6 uW w r0W won Iw arry MII—whetaoever Tho span shell not oe rawooucea M wnak or kt Part v hmt tr wnnen V-1 of Care Leboretanaa <br />