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ADPL, INC. <br /> Wet Chemistry Lab <br /> QC Summary <br /> Client: Camp, Dresser McKee, Inc. <br /> ARF: 27886 <br /> Method 353.2 <br /> Analyte: NO3-N <br /> Blank Recovery <br /> Blank Conc.Img/L) Qf& <br /> NO3-N <0.1 980616A-353.2 <br /> Matrix Duplicate and Spike <br /> Sample A m /St! R m SSR(ma/L) %R RPD Q <br /> 65679W 0 4.0 X X 0.0 980616A-353.2 <br /> 65679WD 0 4.0 X X 980616A-353.2 <br /> 65679WMS 8 4.0 11.9 98.8 0.0 980616A-353.2 <br /> 65679WMSD 8 4.0 11.9 98.8 980616A-353.2 <br /> Laboratory Control Sample <br /> n l A m S (mo/Ll XR RPD <br /> NO3-N 8 8.0 100.0 1.2 980616A-353.2 <br /> ANIL NO3-N 8 8.1 101.3 X 980616A-353.2IF <br /> ` <br /> Initial Calibration Verification <br /> Analvte A m SSR(mg1) %R <br /> NO3-N 3 3.1 103.3 980616A-353.2 <br /> Continuing Calibration Verification <br /> Analyte SAjmg/L) SSR(ma/L) <br /> NO3-N 5 5.1 102.0 980616A-353.2 <br /> NO3-N 5 4.8 96.0 980616A-353.2 <br /> Acceptable limit for the method blank is<than the MRL (0.1 mg/L). <br /> Acceptable limit for a matrix duplicate is RPD<20. <br /> Acceptable limit for matrix spike is+/-25%spike recovery. <br /> Acceptable limit for Laboratory Control Sample is+/-20%spike recovery <br /> SA=spike amount SR=sample recovery SSR=sample spike recovery <br /> %R=%recovery RPD=relative %difference QCG=quality control group <br /> S CS 011080 <br /> Page I City of Stockton 190855-00% <br />