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HOUSTON LABORATORY <br /> ** SPL BATCH QUALITY CONTROL REPORT ** 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> ® CA LUFT PHONE(713)660 0905 <br /> Matrix Aqueous Batch Id HP N970427122000 <br /> Units mg/L <br /> L A B O R A T O R Y C OUTROL SAM P L E <br /> S P I K E Method Spike Blank Spike QC Limits("•} <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> k k Recovery Range <br /> Petroleum Hydrocarbons-Gas ND 1 00 0 72 72 0 50 - 150 <br /> MATRIX S PIKES <br /> S P I K E Sample Spice Matrix Spike Matrix Spike MS/MSD QC Limits(***) <br /> C O M P O U N D S Results Added Duplicate Relative t (Advisor-0 <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max Recovery Range <br /> PETROLEUM HYDROCARBONS-GAS ND 0 9 1 30 144 1 32 147 2 06 50 50 - 150 <br /> L <br /> Analyst VHZ * = values Outside QC Range s . Data outside Method Specification limits <br /> Sequence Date 04/27/97 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 9704B36-06A ND - Not Detected/Below Detection Limit <br /> Sample File ID NND7861 TXO t Recovery - [( <1> - <2> ) / <3> J x 100 <br /> Method Blank File ID LCS % Recovery - (<1> / <3> } x 100 <br /> .111ank Spike File ID NND7854 TXO Relative Percent Difference (<4> - <5> / [(<4> + <5> ) x 0 51 x 100 <br /> Matrix Spike File ID NND7857 TXO (**Y Source Temporary Limits <br /> Matrix Spike Duplicate File ID NND7858 TXO (***} a Source Temporary Limits <br /> SAMPLES IN BATCH(SPL ID) 9704960-03A 9704960-02A 9704B36-OIA 9704B36-03A <br /> 9704B36-04A 97041336-OSA 9704B36-08A 9704B36-10A <br /> 9704B36-07A 9704B36-09A 9704B36-11A 9704960-OIA <br /> 9704836-06A 9704960-04A <br />