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SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> ZAJ6 ffd Z 8 <br /> METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> • Matrix: Aqueous Batch Id: HP N971002175400 PHONE(713)660-0901 <br /> Units: µg/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 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> t % Recovery Range <br /> MTBE ND 50 51 102 63 - 120 <br /> Benzene ND 50 50 100 62 - 121 <br /> Toluene ND 50 51 102 66 - 136 <br /> EthylBenzene ND 50 50 100 70 - 136 <br /> O Xylene ND 50 52 104 74 - 134 <br /> M & P Xylene ND 100 100 100 77 - 140 <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 Duplicate Relative k (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE ND 20 20 100 18 90.0 10.5 20 39 - 150 <br /> BENZENE ND 20 21 105 21 105 0 25 39 - 150 <br /> TOLUENE ND 20 20 100 21 105 4.88 26 56 - 134 <br /> HYLBENZENE ND 20 21 105 21 105 0 38 61 - 128 <br /> O XYLENE ND 20 21 105 21 105 0 29 40 - 130 <br /> M & P XYLENE NO 40 42 105 42 105 0 20 43 - 152 <br /> Analyst: fah * = Values Outside QC Range. c > Data outside Method Specification limits. <br /> sequence Date: 10/02/97 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL. ID of sample spiked: 9709B70-01A '� ND - Not Detected/Below Detection Limit <br /> Sample File ID: N_J7049.TXO % Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS % Recovery = )<1> / <3> } x 100 <br /> Blank Spike File ID: N_J7037.TXO Relative Percent Difference = 1 (<4> - <5> I / [(<4> + <5> ) x 0.5] x 100 <br /> Matrix Spike File ID: N_J7045.TXO [**) = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: N_J7046.TX0 (***) R Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID) : 9709868-04A 9709368-05A 9709570-03A 9709370-04A <br /> 9709870-05A 9709D42-01A 9709A56-01B 9709A56-026 <br /> 9709A56-03B 9709A56-04B 9709A59-01B 9709A59-028 <br /> 97091370-04A 9709670-01A 9709B70-02A 9709868-01A <br /> 9709868-02A 9709658-03A <br /> • <br />