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* SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> p HOUSTON, TEXAS 77054 <br /> A49 7. .. Batch Id: HP_N981104112200 PHONE(713)660-0901 <br /> Units: ug/L <br /> L A B 0 R A T 0 R Y C 0 N T R 0 L S A M P L E <br /> S P I K E Method Spike Blank Spike QC Limits(**) <br /> C 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <Z> <3> <1> % % Recovery Range <br /> MTBE <br /> NO 50 45 90.0 72 - 128 <br /> Benzene ND 50 45 90.0 61 - 119 <br /> Toluene ND 50 45 90.0 65 - 125 <br /> EthylBenzene ND 50 44 88.0 70 - 118 <br /> 0 Xylene ND 50 46 92.0 72 - 117 <br /> M & P Xylene NO 100 88 88.0 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 N P 0 U N D S Results Added Duplicate Relative % (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE 3.4 20 23 98.0 24 103 4.98 20 39 - 150 <br /> BENZENE ND 20 20 100 20 100 0 21 32 - 164 <br /> TOLUENE NO 20 20 100 20 100 0 20 38 - 159 <br /> ETHYLBENZENE ND 20 19 95.0 20 100 5.13 19 52 - 142 <br /> 0 XYLENE ND 20 20 100 20 100 0 18 53 - 143 <br /> M & P XYLENE ND 40 39 97.5 38 95.0 2.60 17 53 - 144 <br /> = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: TB « = Data outside Method Specification limits. <br /> Sequence Date: 11/04/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 981OD69-02A ND = Not Detected/Below Detection Limit <br /> Sample File ID: N K1105.TX0 % Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID: LCS % Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID: N_K1098.TX0 Relative Percent Difference = I(<4> - <5> / [(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: N K1100.TX0 (* ) = Source: SPL-Houston Historical Data 01st Q 197) <br /> Matrix Spike Duplicate File ID: N_K1101.TXO (***) = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID)- 981OD17-02A 9810038-09A 981OD71-01A 9811043-04A <br /> 9811043-03A 9810069-OIA 981OD71-03A 981OD71-02A <br /> 981OD71-04A 981OD71-07A 981OD71-06A 981OD71-05A <br /> 981OD69-02A 9811039-01A 9811040-01A 981OD17-01A <br />