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w <br /> SPL BATCH QUALITY CONTROL REPORT ** PAGFHOUSTON LABORATORY <br /> METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> O HOUSTON TEXAS 77054 <br /> PHONE (713)860 0901 <br /> Matrix Aqueous Batch Id HP-N960410022500 <br /> Units µg/L <br /> L A B 0 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 e M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> % % Recovery Range <br /> MTBE ND 50 53 106 20 - 110 <br /> Benzene ND 50 50 100 62 - 121 <br /> Toluene ND 50 54 108 66 - 136 <br /> EthylBenzene ND 50 51 102 70 - 136 <br /> O Xylene ND 50 51 102 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 I Matrix Spike MS/MSD QC Limits(***) <br /> C O M P O 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 /> F <br /> ND 20 16 80 0 16 80 0 0 20 39 - 150 <br /> ND 20 16 80 0 16 80 0 0 25 39 - 150 <br /> ND 20 19 95 0 20 100 5 13 26 56 - 134 <br /> ENE ND 20 16 80 0 16 80 0 0 38 61 - 128 <br /> ND 20 15 75 0 15 75 0 0 29 40 - 130 <br /> ENE ND 40 29 72 5 30 75 0 3 39 20 43 - 152 <br /> Analyst VHZ * = values Outside QC Range <br /> Sequence Date 04/10/96 NC . Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 9604098-14A ND - Not Detected/Below Detection Limit <br /> Sample File ID N_027 TXO } Recovery = [( <1> - <2> ) / <3> 3 x 100 <br /> Method Blank File ID LCS It Recovery . (<1> / <3> ) x 100 <br /> Blank Spike File ID N_010 TXO Relative Percent Difference = � (<4> - <5> � / [(44> + <S> ) x 0 51 x 100 <br /> Matrix Spike File ID N�021 TXO (**) Source SPL-Houston Historical Data (3rd Q 195) <br /> Matrix Spike Duplicate File ID N_022 TXO (*'*) = Source SPL-Houston Historical Data (2nd Q 195) <br /> SAMPLES IN BATCH(SPL ID}_ 9604098-12A 9604098-14A 9604100-03A 9604100-04A <br /> 9604100-07A 9604100-02A 9604077-08A 9604100-OIA <br /> 9604098-11A 9604098-13A 9604098-IOA 9604100-05A <br /> 9604100-06A 9604098-11A 9604098-13A 9604100-01A <br /> I <br /> QC Off.cer <br />