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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 981417 Date 09/28/98 <br /> CUSTOMER- Fluor Dental GTI PROJECT SL MANTECA 103996304 ATTN Greg Mason <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> JHLCS=J=Labortory Control Sampte 408082701 09/27/98 0600 <br /> i <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> nzene 19 472 20 97 4 % 39-150 <br /> hylbenzene 19 079 20 95 4 % 32-160 <br /> thyl-t-Butyl Ether (MTBE) Z2 189 20 110 9 % 50-150 <br /> oLuene 19 003 20 95 0 % 46-148 <br /> Xylenes (total) 56 62 60 94 4 % 75-125 <br /> LC5 Laboratory Control Sample 98082701 09/27/98 Ob25 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> inzene 19 453 20 97 3 % 39-150 <br /> Ethylbenzene 19 308 20 96 5 % 32-160 <br /> Methyl-t-Butyl Ether (MTBE) 21 835 20 109 2 % 50-150 <br /> luene 18 809 20 94 0 % 46-148 <br /> lenes (total) 56 13 60 93 5 % 75-125 <br /> Method Blanc 09/27/98 0650 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> J6:Benzene 0 0 5000 <br /> lhylbenzene 0 0 5000 <br /> thyl-t-Butyl Ether (MTBE) 0 10 0000 <br /> l+fe-,- 0 0 5000 <br /> Xylenes (total) 0 00 0 5000 <br /> CCV Continuing Calibration Verification 08082701 09/28/98 1026 <br /> Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result Limits <br /> zene 19 257 20 96 /. 85-115 <br /> hylbenzene 19 704 20 99 % 85-115 <br /> Methyl-t-Butyl Ether (MTBE) 20 390 20 102 % 85-115 <br /> �Luene 19 837 20 99 7 85-115 <br /> Lenes (total) 58 989 60 98 % 85-115 <br /> Test Method EPA 8015Mod Batch 2990 Analyst pmc <br /> Method Description Total Volatile Petroleum Hydrocarbons Units ug/L <br /> CV Continuing Calibration Verification 08030b01 ue VaLu09/26/98 0211 <br /> Parameter/Test Description QC Result QC Result Tre Orig Value Calc Result * Limits <br /> Gasoline Range Petroleum Hydrocarbons 808 1000 0 81 % 85-115 <br /> Page 9 <br /> REC R-RPD A-ABS Diff D^% Diff <br /> noir ,orx nn ,. t ax 1 •�I� tw,n man a i s >sw n x le v o d <br /> I-ease, r rvc,I n r[!f N i Lsrty to Co a L [ w y se � ri.r, t r 1 s r f I n a s sn nen ra iro[ [ ly pLf,+Op w,x .Ir of Ia1M s�! <br /> vdl 9t n n[ a ,Nlv w liu 5. V cu w,t wlnw rt yl +Ms r4 YJ Wsd t. q p+.v Ii s r giik Fron - nwnol®d wr- 1 mlri auxo di.1 Cda Lat.t <br /> ixY r <br />