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= —M*' , , , " , , 11 = M = M = M <br /> :w <br /> B C LARORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> METHOD 5030/8020/8015M TPH GAS <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 98-13514-1 98-13514-3 <br /> 11 1 I I I MS MSD 1 I Precrsronj I I Accuracy 11 <br /> 11 { { Sample MS I MSD I Spike 1 Spike { ISpike I Control 1 MS I MSD I Control 11 <br /> IlConstituents 1QC Sample ID Result 1 Result I Result { Level I Level {Units 1R P D { Limits It Rec It Rec I Limits 11 <br /> I1Benzene 113439-12 { 6 02 1 58 59 1 50 50 1ug/L 1 2 1 101104 1106 1 _BO - 12011 <br /> 11Toluene 113439-12 0 26 53 1 53 50 1 50 1pq/L 1 1 101105 1106 1 80 - 12011 <br /> IIEth 1 Benzene 13439-12 D 62 53 53 50 50 L 1 101104 1105 1 80 12011 <br /> 11 &m-X lenes 13439-12 1 01 107 108 100 1 100 L I 1 1 10 106 1107 1 80 - 120k1 <br /> Ito-Xylene 13439-12 0 92 53 54 so I 50 I jig/L 1 2 10 104 1106 1 80 - 12011 <br /> IlTotal Petroleum 1 I I I I 1 1 I I I I 1 11 <br /> 11 Hydrocarbons (gas) 10FW 1 < 50 1 1029 I 941 1 9B9 1 9BO 1pg/L 1 9 1 101105 1 96 1 65 - 11511 <br /> 1 i i l E <br /> MS = Matrix Spike MSD = Matrix Spike Duplicate, RPD = Relative Percent Difference <br /> Quality.£ontip r Officer <br /> Apt any 9 anno <br /> 43110 I— J11 1 - V 1 I— ('j <br />