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7SPHOUSTON <br /> L BATCH QUALITY CONTROL REPORT -- HOUSTON LABORATORY <br /> METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> O <br /> TEXAS 77054 <br /> 4PHONE(713)660-0901 <br /> Matrix Aqueous Batch Id HP_J961024105700 <br /> Units ug/L <br /> L A B O R A T O R Y C 0 N T R 0 L S A M P L E <br /> S P I K E Method Spike Blank Snake OC Limits(*') <br /> C 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> c3> <1> t t Recovery Range <br /> MTBE ND 50 59 118 63 - 120 <br /> Benzene ND 50 53 106 62 - 121 <br /> Toluene ND 50 52 104 66 - 136 <br /> EthylBenzene ND SO 53 106 70 - 136 <br /> 0 Xylene ND 50 52 104 74 - 134 <br /> M & P Xylene ND 100 110 110 77 - 140 <br /> M A T R I X S P I K E S <br /> S P I K E Sample Spike Matrxx Spike Matrix Spike MS/MSD QC Limits(***) <br /> C O M P O U N D S Results Added Duplicate Relative t (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> c5> Max Recovery Range <br /> MTBE 34 20 52 90 0 51 85 0 5 71 20 39 - 150 <br /> BENZENE 39 20 56 85 0 58 95 0 11 1 25 39 - 150 <br /> TOLUENE 1 2 20 25 119 23 109 8 77 26 56 - 134 <br /> ETHYLBENZENE 8 6 20 33 122 33 122 0 38 61 - 128 <br /> 0 XYLENE 3 4 20 25 108 24 103 4 74 29 40 - 130 <br /> M & P XYLENE 9 0 40 54 112 53 110 1 80 20 43 - 152 <br /> Analyst RL * s values Outside QC Range <br /> Sequence Date 10/24/96 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 961OA61-04A ND = Not Detected/Below Detection Limit <br /> Sample File ID J_J6868 TXO % Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID LCS t Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID J_J6875 TXO Relative Percent Difference 1 (<4> - <5> 1 / [(<4> + <5> ) x 0 5] x 100 <br /> Matrix Spike File ID J J6883 TXO (**) = Source SPL-Houston Historical Data (3rd Q 195) <br /> Matrix Spike Duplicate File ID J_J6864 TXO {-•*) Source SPL-Houston Historical Data Ord Q 196) <br /> SAMPLES IN BATCH(SPL ID) 961OA61-05A 961OB48-01A 961OB48-02A 961OB48-03A <br /> 9610B48-04A 961OB48-05A 961OB48-06A 961OB21-07A <br /> 961OB21-10A 961OB21-11A 961OB21-01A 961OB21-09A <br /> 9610A61-04A 961OB21-02A 961OA62-07A 9610A61-05A <br /> 961OA61-02A 961OB21-03A 961OB21-04A <br />