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SPI, BATCH QUALITY CONTROL REPORT ** PAGEHOUSTON LABORATORY <br /> = METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> O HOUSTON TEXAS 77054 <br /> PHONE(713)660-0901 <br /> Matrix Aqueous Batch Id HP_N960409053400 <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 Sp:ke Blank Spike _ QC Limits(**) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> I % Recovery Range <br /> MTBE ND SO 49 98 0 20 - 110 <br /> Benzene ND 50 47 94 0 62 - 121 <br /> Toluene ND 50 48 96 0 66 - 136 <br /> EthylBenzene ND 50 47 94 0 70 - 136 <br /> O Xylene ND 50 47 94 0 74 - 134 <br /> M & P Xylene ND 100 93 93 0 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 O M P O U N D S Results Added Duplicate Relative Adviso ) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max Recovery Range <br /> MTBE 54 20 63 45 0 75 105 80 0 * 20 39 - 150 <br /> BENZENE ND 20 17 85 0 19 95 0 11 1 25 39 - 150 <br /> OLUENE ND 20 22 110 24 120 8 70 26 56 - 134 <br /> HYLBENZENE ND 20 16 80 0 18 90 0 11 8 38 61 - 128 <br /> O XYLENE ND 20 16 80 0 18 90 0 11 8 29 40 - 130 <br /> M & P XYLSNE ND 40 31 77 5 35 87 5 12 1 20 43 - 152 <br /> Analyst VHZ * Values Outside QC Range <br /> Sequence Date 04/09/96 NC = Not Calculated (Sample exceeds spike by factor of 4 or mare) <br /> SPL ID of sample spiked 9604077-04A ND = Not Detected/Below Detection Limit <br /> Sample File ID N_984 TXO % Recovery - [( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID LCS t Recovery - (<1> / <3> I x 100 <br /> Blank Spike File ID N_975 TXO Relative Percent Difference (<4> - <5> / [(<4> + <5> ) x 0 51 x 100 <br /> Matrix Spike File ID N_979 TXO (**I = Source SPL-Houston Historical Data (3rd Q 195) <br /> Matrix Spike Duplicate File ID N_980 TXO (***) = Source SPL-Houston Historical Data (2nd Q 195) <br /> SAMPLES IN BATCH(SPL ID) 9604077-04A 9604098-OSA 9604077-06A 9603FO6-04A <br /> 9603F06-05A 9603E92-02A 9604077-02A 9604077-03A <br /> 9604077-OSA 9604077-OBA 9604098-OIA 9604098-06A <br /> 9604098-02A 9604098-03A 9604098-07A 9604098-08A <br /> 9604096-09A 9604388-OIA 9604388-03A <br /> QC Officer <br />