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M Mir M <br /> B C LABORATORIES + <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision 6 Accuracy) <br /> Method 524 2 <br /> ATC ASSOCIATES Date of Report 12/10/98 <br /> 1117 LONE PALM AVENUE SUITE B Sample Matrix Groundwater <br /> MODESTO CA 95351 <br /> DREW VAN ALLEN <br /> Samples Affected 98-13514 4 <br /> II 1 1 I MS I MSD I I Precision) I I Accuracy 11 <br /> II I Sample MS I MSD I Spike 1 Spike 1 (Spike I Control I MS I MSD I Control 11 <br /> IlConstituentu IQC Sample ID I Result Result I Result I Level 1 Level jUnits IR P D I Limits 1% Rec 1% Rec I Limits 11 <br /> 1113enzene 13409-1 < 0 5 18 19 Ib 16 L 2 20 115 117 80 - 12011 <br /> 11Bromodichloromethane 13409-1 < 0 5 15 15 16 lb L 0 20 93 92 80 - 1201[ <br /> I]Chlorobenzene 13409-1 < 0 5 18 17 16 1 lb L 1 2 1 20 110 1108 80 12011 <br /> IlChloroethane 13409-1 < 0 5 17 17 16 1 16 1, 1 5 1 20 104 1109 1 80 - 12011 <br /> 1)1,4-Dichlorobenzene 113409-1 1 < 0 5 1 17 I 17 16 1 16 1pg/L 1 3 1 201109 1105 1 80 - 12011 <br /> 111,1 Dichloroethane 113409-1 i < 0 5 1 15 1 15 1 16 1 16 Ipg/L _ _ _111 201 95 1 96 I 80 12011 <br /> 111 1-Dichloroethene 113409 1 1 < 0 5 1 16 1 16 1 16 1 16 Ipg/L I1_-_f_ _ 201102 1103_ BO - 12011 <br /> JIToluene 113409-1 I < 0 5 1 15 1 14 I 16 1 16 1jig/L 1 5 1 20195191 1 80 _ 12011 <br /> IlTrichloroethene 113409-1 1 = 0 5 1 16 1 16 1 16 1 16 lug/L 1 4 1 201103 1 98 I BO - 12011 <br /> • <br /> MS = Matrix Spike MSD = Matrix Spike Duplicate RPD = Relative Percent Difference <br /> Quality Contkol/pfficer <br /> t font Be an o <br /> r <br /> I <br /> 1 I <br /> 1 1, Id LBL-) -1,27 441 1 1 �,Jk I ,f i i -j I 1 <br />