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SPL BATCH QUALITY CONTROL REPORT •- HOUSTON LABORATORY <br /> METHOD 8020/642 8880 INTERCHANGE DRIVE <br /> O HOUSTON,TEXAS 77054 <br /> irlx: Aqueous Batch Id: HP_U971022190700 PHONE(713)660-0901 <br /> Units: Ng/L <br /> L A B O R A T O R Y CONTROL SAM PLE <br /> S P I K E Method Spike Blank Spike____ QC Limitsf—I <br /> C 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> 42> <3> <1> i k Recovery Range <br /> MTBE ND 50 51 102 72 - 128 <br /> Benzene ND 50 53 106 61 - 119 <br /> Toluene ND 50 54 108 65 - 125 <br /> EthylBenzene ND 50 52 104 70 - 11B <br /> 0 Xylene ND 50 52 104 72 - 117 <br /> M 4 P Xylene ND 190 100 100 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 O M P 0 U N D S Results Added Duplicate Relative k (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> 42> <3> <1> 44> <1> <5> Max. Recovery Range <br /> MTBE 920 20 B80 NC 880 NC NC 20 39 150 <br /> BENZENE ND 20 1B 90.0 19 95.0 5.41 21 32 - 164 <br /> TOLUENE ND 20 18 90.0 18 90.0 0 20 38 - 159 <br /> ETHYLBENZENE ND 20 17 85.0 17 85.0 0 19 52 - 142 <br /> 0 XYLENE ND 20 17 85.0 16 80.0 6.06 19 53 - 143 <br /> M & P XYLENE ND 40 33 82.5 32 80.0 3.08 17 53 - 144 <br /> Analyst: MF - Values Outside QC Range. • - Data outside Method Specification limits. <br /> Sequence Date: 10/22/97 NC - Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9710855-01A ND - Not Detected/Below Detection Limit <br /> Sample File ID: U_J7880.TXO k Recovery - I( <1> - <2> ) / 43> 1 x 100 <br /> Method Blank File ID: LCS k Recovery - (<1> / <3> 1 x 100 <br /> Blank Spike File ID: U_J7876.TXO Relative Percent Difference (<4> - <5> / I(<4> - <5> ! x 0.51 x 100 <br /> Matrix Spike File ID: U_J7877.TXO (•'} - Source: SPL-Houston Historical Data (1st Q 1971 <br /> Matrix Spike Duplicate File ID: U_J7878.TXO (`•'} - Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCi(SPL ID)4 9710855-06A 9710877-04A 9710877-02A 9710877-03A <br /> 9710855-03A 9710855-07A 9710805-10A 9710805-IIA <br /> 9710833-OSA 9710833-02A 9710855-DIA 9710855-02A <br /> 9710855-05A 9710855-01A 9710855-02A 9710855-04A <br /> 9710855-OSA <br />