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16 - LAB 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 991022 Report Date 06/15/1999 <br /> C�ITGroUp PROJECT Southland - Martinez ATTN, Shelby Lathrop <br /> Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD Matrix Spike Duplicate 09060801 991050-1 06/15/1999 0129 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 221 63 243 18 50 210 14 23 0 39-150 X <br /> 9 20 <br /> Ethylbenzene 114 65 122 98 50 76 42 76 5 32-160 <br /> 7 20 <br /> ethyl-t-Butyl Ether (MTBE) 268 23 253 53 250 0 00 107 3 50-150 <br /> 6 25 <br /> Toluene 58 11 58 02 50 0 00 116 2 46-148 <br /> 0 20 <br />�ylenes (total) 225 64 233 92 150 97 19 85 6 75-125 <br /> 4 20 <br /> Test Method EPA 82608 Batch 6653 Analyst gfb <br /> Method Description Volatile Organics by GC/MS Units ug/L <br /> CS Laboratory Control Sample 49060402 06/10/1999 1313 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tent-Butyl Alcohol (TBA) 974 19 1000 000000 97 4 37-175 <br /> fi-Isopropyl Ether 52 12 50 000000 104 2 60-138 <br /> thy( tert-Butyl Ether (ETRE) 41 72 50 000000 83 4 51-143 <br /> ert-Amyl Methyl Ether 40 52 50 000000 81 0 64-137 <br /> Methyl-t-Butyl Ether (MTBE) 98 41 100 000000 98 4 33-169 <br /> 1,2-Dichloroethane 9 76 10 000000 97 6 70-130 <br /> MS Method Blank 06/10/1999 1342 <br /> . Parameter/Test Description QC Result QC Result True Value orig Value Calc Result * Limits F <br /> ert-Butyl Alcohol (TBA) 0 <br /> Di-Isopropyl Ether 0 <br /> Ethyl tert-Butyl Ether (ETBE) 0 <br /> 0ert-Amyt Methyl Ether 0 <br /> ethyE-t-Butyl Ether (MTBE) 0 <br /> ,2-Dichloroethane 0 <br /> MS Matrix Spike 09060402 991024-6 06/10/1999 1536 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Iert-Butyl Alcohol (TBA) 692 34 1000 000000 0 69 2 48-194 <br /> 1-IsopropyE Ether 48 62 50 000000 0 97 2 53-149 <br /> thyl Cert-Butyl Ether (ETBE) 37 76 50 000000 0 75 5 53-148 <br /> tert-Amyl Methyl Ether 39 32 50 000000 0 78 6 49-158 <br /> ethyl-t-Butyl Ether (MTBE) 79 24 100 000000 3 28 76 0 44-190 <br /> 2-Dichloroethane 9 05 10 000000 0 91 81 4 70-130 <br /> Page 13 <br /> * Y=/ REC, R=RPD, A=ABS Diff D=% Diff <br /> Tn55n tvi ca�ssent ne oe wo tnu mono co to WlOn n I nS1 swp 11 5 a co tl n t1h I msl pw1 y t t wotl wnll O s inst tmw tt!in 1',— <br /> I <br /> Hf Cu©GCo,LahwIIttSruwtnLat P d al1�1 also"v�tt1wnl J itYxt1 mPW1.saOl tto n l(eNnal slsO owf lttousrl a col f s1.�ltyl ticolx01 <br /> en 11 s0v11 1 <br /> n9el Sa6mas[e✓olOY wCae r CICs of anCsaGaml Iubu xa 3 <br /> 5 <br /> Lal n alb r <br />