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SPL BATCH QUALITY CONTROL REPORT *+ HOUSTON LABORATORY <br /> California LUF1' Manual for Gasoline 8880 INTERCHANGE DRIVE <br /> O" HOUSTON TEXAS 77054 <br /> AgePHONE(713)660 0901 <br /> Matrix Aqueous Batch Id VARE990112074100 <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 0 U N D S Blank Result Added Result Recovery {Mandatory) <br /> <2> <3> <1> t % Recovery Range <br /> Gasoline Range Organics ND 1 0 0 94 94 0 64 - 131 <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 t (Advisory__ <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max Recovery Range <br /> GASOLINE RANGE ORGANICS ND 0 90 0 79 87 8 0 9C 88 9 1 25 36 36 - 160 <br /> - = values outside QC Range due to Matrix Interference (except RPO) <br /> Analyst LS < - Data outsiae Method Specification limits <br /> Sequence Date 01/12/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or morel <br /> SPL ID of sample spiked 9901282-02A ND = Not Detected/Below Detection Limit <br /> Sample File ID EEA2056 TXO % Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> •Method Blank File ID LCS * Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID EEA2049 TXO Relative Percent Difference = 1 (<4> - <5> / ( I<4> . <5> I x 0 51 x 100 <br /> Matrix Spike File ID EEA2052 TXO {'*I Source SPL-Houston Historical data {ist Q 971 <br /> Matrix Spike Duplicate File ID EEA2053 TXO {"'I - Source SPL-Houston Historical Data (1st Q 97y <br /> SAMPLES IN BATC4(SPL_ID) 9901281-03A 9901261-04A 9901281-OSA 9901281-06A <br /> 9901280-03A 9901282-03A 9901280-02A 9901262-OIA <br /> 9901282-02A 9901261-OIA 9901281-02A <br /> i <br />