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SPL BATCH QUALITY CONTROL REPORT ** PAGE HQUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® Modified 8015 - Gasoline HOUSTON TEXAS 77054 <br /> _ PHONE(713)660 0901 <br /> Matrix: Aqueous Batch Id HP 5950619013800 <br /> Units: mg/L <br /> L A B 0 R A T 0 R Y C 0 N T R 0 L S A M P L E <br /> S P I K E Method Spike Blank Spike QC Limits(**) <br /> C 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> % % Recovery Range <br /> Petroleum Hydrocarbons ND 1 0 0 92 92.0 56 - 139 <br /> M A T R I X S P I K E S <br /> S P 1 K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits(***) <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 /> Petroleum Hydrocarbons ND 0.9 0 66 73 3 0.63 70 0 4 61 18 40 - 158 <br /> Analyst VH2 * = Values Outside QC Range <br /> Sequence Date 06/19/95 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9506409-11A NO = Not Detected/Below Detection Limit <br /> Sample File ID S_537.TX0 % Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID LCS % Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID S_529.TXO Relative Percent Difference = 1(<4> - <5> 1 / [(<4> + <5> ) x 0 51 x 100 <br /> Matrix Spike File ID S_549 TXO� (**) = Source SPL-Houston Historical Data <br /> Matrix Spike Duplicate File ID: S550 TXO (***) = Source SPL-Houston Historical Data <br /> SAMPLES IN BATCH(SPL ID): 9506409-06A 9506409-08A 9506438-02A 9506409-07A <br /> 9506409-09A 9506409-08A 9506438-01A 9506409-IOA <br /> 9506409-13A 9506409-12A 9506409-11A 9506409-14A <br /> Idelis Williams OC Officer <br />