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* PL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> Method 8020A*** <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> Batch Id: HP S980924023100 PHONE (713)660-0901 <br /> Units: ug/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 /> <2> <3> <1> k t Recovery Range <br /> MTBE ND 54 51 102 72 - 128 <br /> Benzene ND 50 47 94,0 61 - 119 <br /> Toluene ND 50 49 98.0 65 - 125 <br /> EthylBenzene ND 50 52 104 70 - 118 <br /> 0 Xylene ND 50 49 98.0 72 - 117 <br /> M & P Xylene ND 100 98 98.0 72 - 116 <br /> M A T R I X S P I K E S <br /> S P 1 K E Sample Spike Matrix Spike Matrix Spike MS/MSD 1 QC Limits(***) <br /> C 0 M P O U N O S Results Added Duplicate Relative t (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE ND 20 29 145 32 160 * 9.84 20 39 - 150 <br /> BENZENE 3.2 20 28 124 27 119 4.12 21 32 - 164 <br /> TOLUENE ND 20 26 130 25 125 3.92 20 38 - 159 <br /> VHYLBENZENE ND 20 30 150 * 28 140 5.90 19 52 - 142 <br /> XYLENE ND 20 27 135 26 130 3.77 18 53 - 143 <br /> M & P XYLENE ND 40 51 128 52 130 1.55 17 53 - 144 <br /> * = values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: YN K Data outside Method Specification limits. <br /> Sequence Date: 09/24/98 NC - Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9809787-01A ND = Not Detected/Below Detection Limit <br /> Sample File ID: S_13162.TXO t Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID: LCS % Recovery = (<l> / c3> ) x 100 <br /> Blank Spike File ID: S_I3149.TX0 Relative Percent Difference 1 (<4> - <5> 1 / [(c4> + <5> ) x 0.53 x 100 <br /> Matrix Spike File ID: S_13152.TXO (**} Source: SPL-Houston Historical Data (1ST Q 197) <br /> Matrix Spike Duplicate File ID: S_I3153.TXo I***) = Source: SPL-Houston Historical Data (1ST Q 197) <br /> SAMPLES IN BATCH(SPL TD) : 9809787-01A 9809787-02A 9809787-04A 9809787-05A <br /> 9809787-06A 9809676-18A 9809911-07A <br />