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rti ' <br />•* PL BATCH QUALITY CONTROL REPORT •• <br />METHOD 8020*** <br />Matri7c Aqueous Batch Id. HP 5951209214800 <br />Units µg/L <br />PAGE HOUSTON LABORATORY <br />8880 INTERCHANGE DRIVE <br />HOUSTON TEXAS 77054 <br />PHONE (713) 660-0901 <br />� 5 <br />QC Officer <br />L A B O R A T O R Y C O N T R O L SAN PL R <br />S P I K E <br />Method <br />Spike Blank --Pike <br />QC Limits(**) <br />C 0 M P O U N D S <br />Blank Result <br />Added Result Recovery <br />(Mandatory) <br /><2> <br /><3a <1> } <br />t Recovery Range <br />Benzene <br />ND <br />50 39 78 0 <br />61 - 123 <br />Toluene <br />ND <br />50 40 80 0 <br />62 - 122 <br />EthylBenzene <br />ND <br />50 45 90 0 <br />56 - 119 <br />O Xylene <br />ND <br />50 44 Be 0 <br />32 - 160 <br />M & P Xylene <br />ND <br />100 89 89 0 <br />32 - 160 <br />M A T R I X S P I K S S <br />" <br />S P I K E <br />Sample Spike <br />Matrix Spike Matrix Spike NS/MSD <br />QC Limits(***) <br />C O M P O U N D S <br />Results Added <br />Duplicate Relative <br />jAdvisoryj <br />Result Recovery Result Recovery Difference <br />RPD <br /><2> <3> <br /><1> <4> al> <5> <br />Max Recovery Range <br />BENZENE <br />ND 20 <br />17 85 0 17 85 0 0 <br />25 39 - <br />150 <br />TOLUENE <br />ND 20 <br />16 80 0 17 85 0 6 06 <br />26 56 - <br />134 <br />ETHYLSENZENE <br />ND 20 <br />17 85 0 18 90 0 5 71 <br />38 61 - <br />128 <br />0 XYLENE <br />ND 20 <br />17 85 O 18 90 0 5 71 <br />20 40 - <br />130 <br />M & P XYLENE <br />ND 40 <br />34 85 0 1 36 90 0 5 71 <br />20 43 - <br />152 <br />Analyst VHZ <br />* Values Outside QC Range <br />NC - Not Calculated (Sample exceeds spike by factor <br />of 4 or more) <br />Sequence Date 12/09/95 <br />SPL ID of sample spiked <br />9512252-03A <br />ND - Not Detected/Below Detection Limit <br />Sample File ID SS —835 TXO <br />t Recovery - [( <1> - <2> ) / <3> ) x 100 <br />Method Blank File ID <br />LCS t Recovery - (<1> / <3> ) x 100 <br />Blank Spike File ID SS -829 <br />TXO <br />Relative Percent Difference (<4> - <5> / [(<4> <br />+ <5> ) x 0 51 <br />x 100 <br />Matrix Spike File ID SS <br />-832 TXO <br />(•*) Source SPL Historical Data <br />Matrix Spike Duplicate File ID SS_833 TXO <br />(*••I Source SPL -Houston Historical Data <br />SAMPLES IN BATCH(SPL ID) <br />9512254-05A <br />9512252-02A 9512254-13A 9512255-03A <br />9512258-04A <br />9512258-03A 9512258-02A 9512258-01A <br />9512255-08A <br />9512218-04A 9512254-09A 9512255-07A <br />9512356-07A <br />9512252-03A 9512252-01A <br />� 5 <br />QC Officer <br />