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July 1, 2021 Lab ID : STK2137140 <br /> Luhdorff& Scalmanini,Consulting Eng. Customer : 3-12023 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Fluoride 300.0 MS mg/L 5.000 104% 87-120 <br /> (SP 2106770-002) MSD mg/L 5.000 106% 87-120 <br /> MSRPD mg/L 10.00 2.4% 516 <br /> 300.0 06/06/21:208554JMR CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 101% 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 101% 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV m 2.500 101% 90-110 <br /> 300.0 06/09/21:206443MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (CH 2173960-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD m 10.00 0.2% _<16 <br /> 300.0 06/10/21:208775MCA CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 98.4% 90-110 <br /> CCB mg/L 0.000 0.1 <br /> CCV m 2.500 98.3% 90-110 <br /> Sultatc 300.0 06/05/21:206261MCA Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 105% 90-110 <br /> MS mg/L 100.0 103% 82-124 <br /> (SP 2106770-001) MSD mg/L 100.0 105% 82-124 <br /> MSRPD mg/L 10.00 2.6% <5'3 <br /> Ms mg/L. 100.0 102% 82-124 <br /> (SP 2106770-002) MSD mg/L 100.0 106% 82-124 <br /> MSRPD m 10.00 3.1% :523 <br /> 300.0 06/06/21:208554JMR CCB mg/L 0.173 0.5 <br /> CCV mg/L 50.00 101% 90-110 <br /> CCB mg/L 0.174 0.5 <br /> CCV mg/L 50.00 101% 90-110 <br /> CCB mg/L 0.172 0.5 <br /> CCV m 50.00 100% 90-110 <br /> 300.0 06/09/21:206443MCA Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 102% 90-110 <br /> MS mg/L 100.0 102% 82-124 <br /> (CH 2173960-001) MSD mg/L, 100.0 103% 82-124 <br /> MSRPD mg1L 10.00 0.7% :�23 <br /> 300.0 06/10/21:208775MCA CCB mg/L 0.125 0.5 <br /> CCV mg/L 50.00 98.9% 90-110 <br /> CCB mg/L 0.138 0.5 <br /> CCV m 50.00 98.8% 90-110 <br /> 11 4500-H B (CC 2181626-001) Dup units 0.2% 4.80 <br /> 4500-H B CH 2173455-OOIL DuP units 0.1% 4.80 <br /> 4500HB 05/24/21:207747jba CCV units 8.000 100% 95-105 <br /> CCV units 4.000 101% 95-105 <br /> 4500HB 06/21/21:209399JBA CCV units 8.000 99.9% 95-105 <br /> CCV units 4.000 101% 95-105 <br /> titrate+Nitrite asN 450ONO3F 05/20/21:205642VVH Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 98.2% 80-120 <br /> MS mg/L 5.609 96.7% 5-285 <br /> (VI 2143795-003) MSD mg/L 5.609 98.2% 5-285 <br /> MSRPD I m 5.609 1.1% 1 _<30.4 <br /> 4500�03F 05/20/21:207567VVH CCB mg/L, 0.116 1 0.2 <br /> /L <br /> CCV m 11.22 96.8% 90-110 <br /> Page 12 of 14 <br />