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August 12, 2021 Lab ID : STK2150124 <br />San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br />Quality Control - Inorganic <br />Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br />Metals <br />Sodium 200.7 07/20/21:211095AC CCB ppm 0.11 1 <br />Zinc 200.7 MS ug/L 800.0 88.3 % 75-125 <br />(SP 2109700-001) MSD ug/L 800.0 90.8% 75-125 <br />MSRPD ug/L 4.000 2.8% <0.0 <br />200.7 07/20/21:211095AC CCV ppm 1.000 94.2% 90-110 <br />CCB ppm 0.0001 0.02 <br />CCV ppm 1.000 99.2% 90-110 <br />CCB ppm 0.00007 0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) 2320B (SP 2109706-001) Dup 0.3% 10 <br />2320B 07/28/21:211555amm CCV mg/1 228 90-110 <br />CCV mg/I 218 90-110 <br />Bicarbonate 2320B (SP 2109706-001) Dup 0.4% 10 <br />Carbonate 2320B (SP 2109706-001) Dup 10 <br />Hydroxide 2320B (SP 2109706-001) Dup 10 <br />Conductivity 2510B 07/28/21:211520sta ICB umhos/cm 0.150 1 <br />CCV umhos/cm 975 95-105 <br />CCV umhos/cm 984 95-105 <br />E. C. 2510B 07/28/21:208530s1a Blank umhos/cm ND <1 <br />(SP 2109706-004) Dup umhos/cm 0.3% 5 <br />Total Dissolved Solids (1 Elt.) 2540CE 07/21/21:208232CTL Blank mg/L ND <20 <br />LCS mg/L 992.1 101 % 90-110 <br />(SP 2109700-001) Dup mg/L 1.2% 5 <br />(SP 2109700-001) Dup mg/L 0.7% 5 <br />Chloride 300.0 07/20/21:208210MCA Blank mg/L ND <1 <br />LCS mg/L 25.00 101% 90-110 <br />MS mg/L 50.00 101 % 85-121 <br />(CH 2175680-001) MSD mg/L 50.00 103% 85-121 <br />MSRPD mg/L 10.00 1.8% <19 <br />MS mg/L 50.00 99.5% 85-121 <br />(STK2150124-001) MSD mg/L 50.00 100% 85-121 <br />MSRPD mg/L 10.00 0.8% <19 <br />300.0 07/20/21:211218MCA ICB mg/L 0.00 1 <br />ICV mg/L 25.00 102% 90-110 <br />CCB mg/L 0.09 1 <br />CCV mg/L 25.00 103% 90-110 <br />Fluoride 300.0 07/20/21:208210MCA Blank mg/L ND <0.1 <br />LCS mg/L 2.500 102% 90-110 <br />MS mg/L 5.000 103% 87-120 <br />(CH 2175680-001) MSD mg/L 5.000 105% 87-120 <br />MSRPD mg/L 10.00 1.6% <16 <br />MS mg/L 5.000 103% 87-120 <br />(STK2150124-001) MSD mg/L 5.000 104% 87-120 <br />MSRPD mg/L 10.00 0.2% <16 <br />300.0 07/20/21:211218MCA ICB mg/L 0.000 0.1 <br />ICV mg/L 2.500 104% 90-110 <br />CCB mg/L 0.000 0.1 <br />CCV mg/L 2.500 104% 90-110 <br />Nitrate 300.0 07/20/21:2082 IOMCA Blank mg/L ND <0.4 <br />LCS mg/L 20.00 100% 90-110 <br />MS mg/L 40.00 102% 85-119 <br />(CH 2175680-001) MSD mg/L 40.00 103% 85-119 <br />MSRPD mg/L 10.00 1.7% <19 <br />MS mg/L 40.00 94.9% 85-119 <br />Page 7 of 9