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* SPL BATCH QUALITY CONTROL REPORT "'" HOUSTON LABORATORY <br /> METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> 'A Ant 'WZ (9) <br /> HOUSTON,TEXAS 77054 <br /> Matrix: MMMEMENNIF AqueousPHONE (713)660-0901 <br /> Batch Id: HP_U971103114000 <br /> Units; Pg/L <br /> ' L A B O R A T O R Y C 0 N T R O L S A M P L E <br /> ' S P I K E Method Spike _ Blank Spike QC Limits I—) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> $ Recovery Range <br /> ' MTBE ND 50.0 58 116 72 - 129 <br /> Benzene ND 50.0 50 100 61 - 119 <br /> Toluene ND 50.0 48 96.0 65 - 125 <br /> ' EthylBenzene ND 50.0 46 92.0 70 - 118 <br /> 0 Xylene ND 50.0 47 94.0 72 117 <br /> M & P Xylene ND 100.0 94 94.0 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(x**y <br /> ' C 0 M P 0 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 /> ' MTBE 24 20 46 110 46 110 0 20 39 - 150 <br /> BENZENE 7.3 20 27 98.5 27 98.5 0 21 32 - 164 <br /> TOLUENE ND 20 21 105 20 100 4.88 20 38 - 159 <br /> ETHYLBENZENE ND 20 20 100 20 100 0 19 52 - 142 <br /> O XYLENE ND 20 20 100 21 105 4.88 18 53 - 143 <br /> M & P XYLENE ND 40 40 100 41 102 1.98 17 53 - 144 <br /> Analyst: fab W = Values Outside QC Range. « = Data outside Method Specification limits. <br /> Sequence Date: 11/03/97 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9710B47-04A ND = Not Detected/Below Detection Limit <br /> Sample File ID: U K709I.TX0 $ Recovery = [( <1> - c2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS k Recovery - (<1> / <3> ) ,x 100 <br /> Blank Spike File ID, U K7069.TXO Relative Percent Difference = 1 (<4> - <5> I / [(<4> + <5- ) x 0.5] x 100 <br /> Matrix Spike File ID: U K7O87.TXO ('") = Source: SPL-Hcuston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: U K7088.TX0 I"•'} Source: SPL-Houston Historical Data (1st Q 197) <br />' SAMPLES IN BATCH(SPL ID) : 9710086-04A 9710086-OIA 971OB47-04A 9710247-05A <br /> 971OB47-02A 571OB47-06A 9710D41-02A 9710E47-OIA <br /> 971OR47-03A 971OD41-01A 971OD42-02A 9710A01-06A <br />' 97JOA01-01A 971OA01-03A 9710A01-04A 9710A01-05A <br /> 9710A01-02A 9710086-03A <br />