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January 12, 2022 Lab ID : STK2158OO1 <br /> Metal Finishing Solutions, Inc. Customer : 3-18181 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Metals <br /> Cadmium 200.8 12/27/21:214853MCA MSRPD ug/L 50.00 3.7% <20.0 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 99.5% 90-110 <br /> CCB ppb 0.013 0.2 <br /> CCV ppb 120.0 100% 90-110 <br /> CCB ppb 0.012 0.2 <br /> Chromium 200.8 12/27/21:214853MCA Blank ug/L ND <1 <br /> LCS ug/L 50.00 102% 85-115 <br /> MS ug/L 50.00 127% 75-125 435 <br /> (STK2158294-001) MSD ug/L 50.00 126% 75-125 435 <br /> MSRPD ug/L 50.00 0.2% <20.0 <br /> MS ug/L 50.00 134% 75-125 435 <br /> (STK2158294-001) MSD ug/L 50.00 140% 75-125 435 <br /> MSRPD ug/L 50.00 8.1% <20.0 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 99.4% 90-110 <br /> CCB ppb 0.18 1 <br /> CCV ppb 120.0 98.8% 90-110 <br /> CCB ppb 0.04 1 <br /> Cobalt 200.8 12/27/21:214853MCA Blank ug/L ND <0.2 <br /> LCS ug/L 50.00 103% 85-115 <br /> MS ug/L 50.00 102% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 106% 75-125 <br /> MSRPD ug/L 50.00 3.4% <20 <br /> MS ug/L 50.00 107% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 105% 75-125 <br /> MSRPD u 50.00 2.8% <20 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 100% 90-110 <br /> CCB ppb -0.031 0.2 <br /> CCV ppb 120.0 99.7% 90-110 <br /> CCB ppb -0.025 0.2 <br /> Copper 200.8 12/27/21:214853MCA Blank ug/L ND <1 <br /> LCS ug/L 50.00 102% 85-115 <br /> MS ug/L 50.00 120% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 140% 75-125 435 <br /> MSRPD ug/L 50.00 5.2% <20.0 <br /> MS ug/L 50.00 120% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 104% 75-125 <br /> MSRPD ug/L 50.00 4.4% <20.0 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 99.6% 90-110 <br /> CCB ppb -0.175 0.5 <br /> CCV ppb 120.0 99.4% 90-110 <br /> CCB ppb -0.236 0.5 <br /> Lead 200.8 12/27/21:214853MCA Blank ug/L ND <0.5 <br /> LCS ug/L 50.00 102% 85-115 <br /> MS ug/L 50.00 102% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 109% 75-125 <br /> MSRPD ug/L 50.00 5.7% <20.0 <br /> MS ug/L 50.00 109% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 107% 75-125 <br /> MSRPD ug/L 50.00 3.4% <20.0 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 99.3% 90-110 <br /> CCB ppb -0.002 0.5 <br /> CCV ppb 120.0 99.3% 90-110 <br /> CCB ppb 0.001 0.5 <br /> Molybdenum 200.8 12/27/21:214853MCA Blank ug/L ND <1 <br /> Page 5 of 8 <br />