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June 12, 2020 Lab ID : STK2037003 <br /> Luhdorff& Scalmanini, Consulting Eng. Customer : 3-12023 <br /> Quality Control-Inorganic <br /> Conrtitnent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Fluoride 300.0 MS mg/L 5.000 98.7% 87-120 <br /> (CH 2073313-003) MSD mg/L 5.000 98.7% 87-120 <br /> MSRPD I mg/L 10.00 0.0% 1 <16 <br /> 300.0 05/21/20:207977JMR ICB mg/L 0.000 0.1 <br /> ICV mg/L 2.500 98.2% 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 98.6% 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV m 2.500 98.2% 90-110 <br /> Nitrate 300.0 05/21/20:205800JMR Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 99.9% 85-119 <br /> (CH 2073313-002) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 0.03% _<19 <br /> MS mg/L 40.00 99.1% 85-119 <br /> (CH 2073313-003) MSD mg/L 40.00 99.1% 85-119 <br /> MSRPD m 10.00 0.01% <19 <br /> 300.0 05/21/20:207977JMR ICB mg/L 0.000 0.5 <br /> ICV mg/L 20.00 98.3% 90-110 <br /> CCB mg/L 0.000 0.5 <br /> CCV mg/L 20.00 98.8% 90-110 <br /> CCB mg/L 0.000 0.5 <br /> CCV mg/L 20.00 98.2% 90-110 <br /> Nitrate+Nitrite as N 300.0 05/21/20:205800JMR Blank I mg/L ND I <0.1 <br /> Nitrate Nitrogen 300.0 05/21/20:205800JMR Blank m L ND <0.I <br /> Nitrite 300.0 05/21/20:205800JMR Blank mg/L ND <0.5 <br /> LCS mg/L 15.00 99.0% 90-110 <br /> MS mg/L 30.00 99.2% 74-126 <br /> (CH 2073313-002) MSD mg/L 30.00 99.9% 74-126 <br /> MSRPD mg/L 10.00 0.7% :520 <br /> MS mg/L 30.00 98.6% 74-126 <br /> (CH 2073313-003) MSD mg/L 30.00 99.2% 74-126 <br /> MSRPD mg/L 10.00 0.6% <20 <br /> 300.0 05/21/20:207977JMR ICB mg/L 0.000 0.5 <br /> ICV mg/L 15.00 96.5% 90-110 <br /> CCB mg/L 0.000 0.5 <br /> CCV mg/L 15.00 97.3% 90-110 <br /> CCB mg/L 0.000 0.5 <br /> CCV mg/L 15.00 98.5% 90-110 <br /> Nitrite Nitrogen 300.0 05/21/20:205800JMR Blank I mgIL ND <0.2 <br /> Sulfate 300.0 05/21/20:205800JMR Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 99.6% 90-110 <br /> MS mg/L 100.0 98.3% 82-124 <br /> (CH 2073313-002) MSD mg/L 100.0 98.4% 82-124 <br /> MSRPD mg/L 10.00 0.06% 1523 <br /> MS mg/L 100.0 97.4% 82-124 <br /> (CH 2073313-003) MSD mg/L 100.0 97.5% 82-124 <br /> MSRPD mg/L 10.00 0.04% <23 <br /> 300.0 05/21/20:207977JMR ICB mg/L 0.182 0.5 <br /> ICV mg/L 50.00 97.7% 90-110 <br /> CCB mg/L 0.189 0.5 <br /> CCV mg/L 50.00 97.8% 90-110 <br /> CCB mg/L 0.183 0.5 <br /> CCV mg/L 1 50.00 97.8% 90-110 <br /> Page 10 of l 1 <br />