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SPL BATCH QUALITY CONTROL REPORT •` HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 77054 <br /> 0 PHONE (713) 660.0901 <br /> Matrix: Aqueous Batch Id: VA-RE9803061:2500 <br /> Units: Kg/L <br /> L A B O R A T O R Y C O N T R O L S A M P L E <br /> S P I K E Method Spike Blank Spike QC Limits(—) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> c2> <3> <1> % t Recovery Range <br /> MTBE ND 50 38 76.0 72 128 <br /> Benzene NO 50 46 92.0 61 - ii9 <br /> oluene ND 50 46 92.0 65 1F5 <br /> EthylBer.zene NO 50 45 90.0 70 <br /> 0 Xylene A'D 50 46 92.0 72 - 17 <br /> M & P xylene ND 100 93 93.0 72 - 116 <br /> M A T R I X S P I K E S <br /> S P I K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits(—*) <br /> C 0 M P 0 U N D S Results Added Duol!cate Relative t (A.,*isorvl <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> e5> Max_ Recovery Range <br /> MTBE 2.2 20 20 89.0 22 99.0 10.6 20 39 - 150 <br /> BENZENE NO 20 21 105 22 110 4.65 21 32 - 16: <br /> -OLL'ENE ND 20 20 100 21 105 4.88 20 38 - 159 <br /> 27HYLBENZENE ND 20 20 100 21 135 4.88 19 32 - 142 <br /> 0 xy:,EN7- ND 20 21 105 21 1.75 0 18 53 143 <br /> M y P XYLENE ND 40 42 105 42 105 0 17 53 - i-.+ <br /> • n Values outside QC Range due to Matrix Interference (except RPD) <br /> Ana`vst: L,;/ _ = Data outside Method Specification limits. <br /> Sequence Date: 63/06/98 NC = Not Calculated ISamOle exceeds spike by factor of 4 or more) <br /> S2:. SD of samole spiked: 9803153-02A NO - Not Detected/Below Detection. Limit <br /> Sample File ID: E_C1172.TX0 4 Recovery - [( c1> - <2> ] / <3> 1 x 100 <br /> Meshed Blank File ID: LCS t Recovery - (<I> / <3> ) x 100 <br /> Blank Spike File ID: E_C1166.TX0 Relative Percent Difference Y I (<4> - <5> 1 [(cS> <5> I x 0.5) x 106 <br /> Matrix Spike File ID: E_C1157.TXO (•`) = Source: SPL-Houston Historical Data (1st Q '97) <br /> xatrix Spike Duplicate File ID: E_C1168.TXO (—) - Source: SPL-Houston Historical Data (isc Q '97) <br /> SAMPLES iN BATCH(SPL IDI : 9803153-02A 9803153-04A 9S02C45-11A 9803226-OIA <br /> 9802C45-07A 9802045-08A 9802C45-09A 9802C45-10A <br /> 9803226-03A 9603224-OIA 9803153-01A 9803153-03A <br /> 9803153-OSA 9803153-07A 9803225-04A 9803224-03A <br />