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Entech Analytical Labs, Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br />' Volatile Organic Compounds <br /> QC Batch#: SGCMS990223 Date analyzed: 02/23/99 <br />' Matrix: Soil Spiked Sample: Blank Spike <br /> Units, µP,IKg <br /> 1 <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> µg/Kg ; µg/Kg ; pg/Kg: %R ; µPIKg ; %R RPD 1 %R <br /> 11,1•Dichloroethene 18240182601 25 1 ND l 28 1 112 27 1 107 1 4.0 1 25 1 50-150 1 <br /> 1 1 I I 1 I 1 1 I 1 i <br /> I I I 1 1 I I 1 <br /> ;Methyl-tent-butyl ether ; $240/82601 1 1 1 25 ND 31 122 29 117 4.4 25 50-150 1 <br /> 1Benzene ; 8240/826011 25 ND 29 117 29 115 1.7 25 50-150 ; <br /> +1Trichloroethene 8240/82601 25 1 ND 1 29 115 28 1 112 2.1 1 25 1 50-150 1 <br /> 1 ! 1 1 1 1 1 I I 1 1 <br /> ,Toluene 18240/82601 25 1 ND 1 27 108 ' 27 108 0.0 25 50-150 1 <br /> i 1 1 i 1 1 l 1 I 1 I I <br /> + 1 1 1 1 1 i i 1 1 1 l <br /> 1 1 l 1 1 1 1 1 <br /> IChlorobenzene 18240/8260, 25 1 ND 1 28 I 110 1 28 1 111 , 0.7 1 25 1 50-150 1 <br /> 1 1 1 1 1 I 1 1 1 I 1 1 <br /> 1 1 I 1 1 F 1 1 1 1 1 1 <br /> Note: LCS and LCSD results reporiedror the following Parameter: <br /> All <br /> Acceptable LCS and LCSD results are reported when matrix interferences cause MS and MSD results to fall outside <br /> established QC limits. <br /> ' Definition of Terms: <br /> na: Not Analyzed in QC batch <br /> ' SA: Spike Added <br /> SR: Sample Result <br /> RPD(%): Duplicate Analysis-Relative Percent Difference <br /> ' SP: Spike Result <br /> SP(%R): Spike% Recovery <br /> SPD: Spike Duplicate Result <br /> ' SPD(%R): Spike Duplicate% Recovery <br /> NC: Not Calculated <br /> 1 <br />