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October 22, 2012 Lab ID : STK1239317 <br /> Arbor Mobile Home Park Customer : 3-16522 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate 300.0 10/05/12:214723CHL CCV ppm 20.00 106% 90-110 <br /> Sulfate 300.0 10/04/12:211119CHL LCS mg/L 50.00 103% 90-110 <br /> MS mg/L 1000 104% 78-137 <br /> (STK1239371-001) MSD mg/L 1000 103% 78-137 <br /> MSRPD mg/L 100.0 0.5% 1 512.3 <br /> 300.0 10/05/12:214723CHL CCB ppm 0.33 2 <br /> CCV ppm 50,00 102% 90-110 <br /> CCB ppm 0.27 2 <br /> CCV ppm 50.00 103% 90-110 <br /> [Nitrogen,Total Kjeldahl 351.2 10/12/12:211434CJJ Blank mglL ND <1 <br /> LCS mg/L 12.00 112% 41-148 <br /> MS mg/L 12.00 120% 25-149 <br /> (SP 1210105-001) MSD mg/L 12.00 105% 25-149 <br /> MSRPD ma/I: 12.00 13.2% :525.7 <br /> BOD 52108 10/03/12:300658CTH RgBlk mg/L 0.52 2 b <br /> RgBlk mg/L 0.32 2 b <br /> LCS mg/L 198.0 104% 84.6-115 <br /> LCS mg/L 198.0 105% 84.6-115 <br /> (STK 1239217-001) Dup mg/L 4.1% 15.9 <br /> (STK1239217-001) Dup mg/L 35.5% 15.9 440 <br /> STK1239217-001) Dup mg/L 35.7% 15.9 440 <br /> 5210B 10/08/12:300671CTH CCV mg/L 1.000 99.0% 80-120 <br /> nitrogen,Total Kjeldahl EPA351.2 10/16/I2:215290AMB CCB mg/L 0,073 0.5 <br /> CCV mg/L 1.000 95.1% 90-110 <br /> CCB mg/L 0.141 0.5 <br /> CCV m /I. 1.000 104% 90-110 <br /> Detlnttion <br /> PDS PDS failed,matrix-Post Digestion Spike(PDS)not within Acceptance Range(AR)because of matrix interferences affecting this <br /> analyte. <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> CCB Continuing Catlibratiott Blank-Analyzed to verily the instrument baseline is within criteria. <br /> Blank ;Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> RgBlk :Method Reagent Blank-Prepared to correct 14 any reagent contributions to sample result. <br /> LCS :Lalxtmtury Control Standard/Sample-Prepared to veri fy that the preparation process is not affecting analyte recovery. <br /> MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSt)pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries <br /> are an indication of how that sairtplc matrix a&ets analyte recovery. <br /> Dup :Duplicate Sample-A random sample with each butch is prepared and analyzed in duplicate.The relative percent difference is an <br /> indication of precision for tate preparationtuid analysis. <br /> MSRPD MS/MSD Itelalive Perccnl Diflcrcnec(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> <'/4 :High Sample Background-Spike concentration was less than one forth of the sample concentration, <br /> DQO :Data Quality Objective-This is the criteria against which the qualitV control data is compared. <br /> ................ <br /> h xplanadou <br /> 430 :Post Digestion Spike(PDS)not within Acceptance Range(AR)because of matrix interferences affecting this analyte. <br /> 440 :Sample nonhomo enei may be affecting this analyte.Data was accepted based on the LCS or CCV recove . <br /> Page 7 of 7 <br />