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HOUSTON LABORATORY <br /> ** SPL BATCH QUALITY CONTROL REPORT *• 888OINTERCHANGE DRIVE <br /> ® CA LUFT HOUSTON TEXAS 77054 <br /> PHONE(713)660 0901 <br /> . Matrix Aqueous Batch Id HP_N970427122000 <br /> Units mg/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 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> t k Recovery Range <br /> Petroleum Hydrocarbons-Gas ND 1 00 0 72 72 0 50 - 150 <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 k (Advisory) <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 /> Analyst VHZ * - Values Outside QC Range x - 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 9704836-06A ND - Not Detected/Below Detection Limit <br /> Sample File ID NND7861 TXO k Recovery - [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID LCS t Recovery - (<1> / <3> } x 100 <br /> 4&ank Spike File ID NND7854 TXO Relative Percent Difference - 1 (<4> - <5> / [(<4> f <5> } x 0 51 x 100 <br /> trix Spike File ID NND7857 TXO ["•} - Source Temporary Limits <br /> Matrix Spike Duplicate File ID NND7858 TXO I***) - Source Temporary Limits <br /> SAMPLES IN BATCH(SPL ID) 9704960-03A 9704960-02A 97041336-01A 9704836-03A <br /> 9704B36-04A 9704B36-05A 9704836-08A 9704836-10A <br /> 9704B36-07A 9704836-09A 9704836-11A 9704960-GIA <br /> 9704$36-0GA 9704960-04A <br />