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OULAB 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 991748 Report Date a 09/09/1999 <br /> CUSTt1MER, IT Group PROJECT: Southland - Martinez ATT#: Bob Butter <br /> QC Type Description Reag. Code Lab ID Dilution Factor Date Time <br /> LCS Laboratory Control Sample '79072803 09/0771999 1124 <br /> Parameter/Test Description QC Result QC Result True Value Orig. Value Calc Result * Limits f <br /> soltne Range Petroleum Hydrocarbons 1019 1000.0 101 9 50-150 <br /> LGD laboratory Control Sample Duplicate 09072803 09/'07/1994 1149 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> asoltne Range Petroleum Hydrocarbons 1082 1019 1000 0 108 2 50-150 <br /> 6 0 30 <br /> MS Matrix Spike 09072803 991758;2 09/08}1999 0101 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result Limits F <br /> Gasoline Range Petroleum Hydrocarbons 1145 1DD0 0 19 113 r 50-150 <br /> uf-MSD Matrix Spike Duplicate 09072803 991758-2 09/08/1999 0127 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> asoltne Range Petroleum Hydrocarbons 1016 1145 1000 0 19 100 50-150 <br /> 11.9 30 <br /> Test Method. EPA 80218 Batch 8337 Analyst evd <br /> Method Descrtptton Volatile Organics -Aromatics Units ug/L <br /> MB Method Blank 71 <br /> 09103/1999 1139 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 0 00 <br /> thylbenzene 0 00 <br /> ethyl-t-Butyl Ether (MTBE) 0 00 <br /> Toluene 0 00 <br /> Xylenes (total) 0 00 <br /> LCS labaratvey Control Sample 09072801 09{03!1999 1256 <br /> Uen,e,e <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Ltmtts F <br /> 47.60 50 95.2 39-150 <br /> Ethylbenzene 52.09 50 104 2 32-1 <br /> Methyl-t-Butyl Ether (MTBE) 251 59 250 100 6 50-1550 <br /> 0 <br /> �oluene 50 06 50 100.1 46-148 <br /> ylenes (total) 155 14 150 103.4 75-125 <br /> • <br /> Page 8 <br /> * %=% REC, R=RPD, A=ABS Diff . D=% Diff <br /> The BNIytCal re9WtS Opndnt n ini0rpre[atwnS WMelned n Ih 6 report aro 08580 400n inlamakon and malerul a.--by the chem Id wM9e e><Glo_and canfKSentul 09!tx5--,hag been T000 TM 4WIy[Ical N9W19-n—Br Inl atprBSB k.ds <br /> "pr—d 1a0re9Mt im bmt lud9menl OI C—Leboraterms Cwe labwatd 09 hpwerer makes no warranty or relaraaant.1 Bn espraw d Itn0Y00 of any I,Bra exwe951Y dl5nlal game a5 to the o W,d mly uo0er ooerairon9 o,Wof tadeneas M <br /> anY-1 Wit or peher nmerel properly wyll d sand In—1--1h Irfaph sn[h rspon is read w rMod upon for any reaa0n wn9I600'+M Thu report 91+09 M11Se'Mod""d w whah a n pad with o i"—IM eM mal of Cwe Laboratw in. <br />