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SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> 'r Method 8020A*** 8880 INTERCHANGE DRIVE <br /> G <br /> ...4-y <br /> HOUSTON, TEXAS 77054 <br /> Batch Id: VARE980516021200 PHONE (713)660-0901 <br /> Units: ug/L <br /> ;r <br /> I <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 a U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> % % Recovery Range <br /> t__} <br /> f=c: MTBE ND 50 64 128 72 - <br /> 12$ <br /> Benzene HD 50 53 106 61 - 119 <br /> Toluene NO 50 53 106 65 - 125 <br /> F' ij EthylBenzene ND 50 51 102 70 - 118 <br /> 0 xylene ND 50 53 106 72 - 117 <br /> M & P Xylene ND 100 110 110 72 - 116 <br /> MATRIX SPIKES <br /> S P I K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits(***) <br /> 1 C O M P O 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 /> MTBE ND 20 24 120 24 120 0 20 39 150 <br /> BENZENE ND 20 23 115 21 105 9.09 21 32 - 164 <br /> ND 20 22 110 20 100 9-52 20 38 - 159 <br /> r 7""i=THYLBENZENE ND 20 22 110 20 100 9.52 19 52 - 142 <br /> 0 XYLENE ND 20 22 110 21 105 4.6518 53 - 143 <br /> _.� M & P XYLENE ND 40 43 108 40 100 7.69 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: HS « = Data outside Method Specification limits. <br /> Sequence Date: 05/16/98 NC = Not Calculated (Sample exceeds spike 6y factor of 4 or more) <br /> ,.' SPL ID of sample spiked: 9805408-01H ND = Not Detected/Below Detection Limit <br /> Sample File ID: E_E2262.TX0 % Recovery = R <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID: LCS % Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID: E_E2249.TX0 Relative Percent Difference = ((<4> - <5> / l(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: E_E2277.TX0 {**) = Source: SAL-Houston Historical Data (1ST Q 197) <br /> Matrix Spike Duplicate File ID: E_E2278.TX0 (***) = Source: SAL-Houston Historical Data (1ST Q 197) <br /> SAMPLES IN BATCH(SPL ID): 9805381-09A 9805381-10A 9805371-058 9805371-01B <br /> 9805371-03B 9805371-04B 9805408-01H 9805381-05A <br /> 9805381-06A 9805381-07A 9805381-08A <br /> -s <br /> 1 <br /> ' f <br /> 'I <br />