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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 /> Molybdenum 200.8 12/27/21:214853MCA LCS ug/L 50.00 92.6% 85-115 <br /> MS ug/L 50.00 101% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 100% 75-125 <br /> MSRPD ug/L 50.00 0.9% <_20 <br /> MS ug/L 50.00 101% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 105% 75-125 <br /> MSRPD ug/L 50.00 3.0% <20 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 97.6% 90-110 <br /> CCB ppb 0.10 1 <br /> CCV ppb 120.0 98.4% 90-110 <br /> CCB ppb 0.12 1 <br /> Nickel 200.8 12/27/21:214853MCA Blank ug/L ND <1 <br /> LCS ug/L 50.00 103% 85-115 <br /> MS ug/L 50.00 103% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 104% 75-125 <br /> MSRPD ug/L 50.00 0.8% <20 <br /> MS ug/L 50.00 107% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 103% 75-125 <br /> MSRPD u 50.00 0.3% <20 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 101% 90-110 <br /> CCB ppb -0.35 1 <br /> CCV ppb 120.0 101% 90-110 <br /> CCB ppb -0.46 1 <br /> Selenium 200.8 12/27/21:214853MCA Blank ug/L ND <1 <br /> LCS ug/L 50.00 102% 85-115 <br /> MS ug/L 50.00 105% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 102% 75-125 <br /> MSRPD ug/L 50.00 3.5% <20.0 <br /> MS ug/L 50.00 102% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 103% 75-125 <br /> MSRPD ug/L 50.00 2.4% <20.0 <br /> 200.8 12/28/21:220026AC CCV ppb 120.0 99.3% 90-110 <br /> CCB ppb -0.24 1 <br /> CCV ppb 120.0 99.4% 90-110 <br /> CCB ppb -0.1 1 <br /> Silver 200.8 12/27/21:214853MCA Blank ug/L ND <0.25 <br /> LCS ug/L 50.00 100% 85-115 <br /> MS ug/L 50.00 53.3% 75-125 435 <br /> (STK2158294-001) MSD ug/L 50.00 55.5% 75-125 435 <br /> MSRPD ug/L 50.00 4.4% <20.0 <br /> MS ug/L 50.00 55.4% 75-125 435 <br /> (STK2158294-001) MSD ug/L 50.00 55.2% 75-125 435 <br /> MSRPD u 50.00 3.8% <20.0 <br /> 200.8 12/29/21:220054AC CCV ppb 120.0 102% 90-110 <br /> CCB ppb -0.12 1 <br /> CCV ppb 120.0 102% 90-110 <br /> CCB ppb -0.12 1 <br /> Thallium 200.8 12/27/21:214853MCA Blank ug/L ND <0.2 <br /> LCS ug/L 50.00 98.6% 85-115 <br /> MS ug/L 50.00 101% 75-125 <br /> (STK2158294-001) MSD ug/L 50.00 104% 75-125 <br /> MSRPD ug/L 50.00 2.9% <_20 <br /> MS ug/L 50.00 107% 75-125 <br /> STK2158294-001 MSD u 50.00 103% 75-125 <br /> Page 6 of 8 <br />