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April 29, 2021 Lab ID : STK2134563 <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 04/10/21:205265AC CCB PPM -0.07 1 <br /> inc 200.7 MS ug/L 800.0 99.2% 75-125 <br /> (CC 2180916-001) MSD ug/L 800.0 98.1 % 75-125 <br /> MSRPD ug/L 4000 1.1% <20.0 <br /> 200.7 04/10/21:205265AC CCV ppm 1.000 101% 90-110 <br /> CCB ppm 0.00003 0.02 <br /> CCV ppm 1.000 107% 90-110 <br /> CCB ppm 0.00006 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2I34770-001) Dup m 0.8% 10 <br /> 23208 04/13/21:205468AMM CCV mg/L 235.8 99.3% 90-110 <br /> CCV mg/L 235.8 92.2% 90-110 <br /> Bicarbonate 2320B (STK2134770-001) Dup m 0.8% 10 <br /> Carbonate 2320B (STK2134770-001) Dup mRIL 0.0 10 <br /> Hydroxide 2320B (STK2134770-001) Dup mg/L 0.0 10 <br /> Conductivity 2510B 04/15/21:205501sta ICB umbos/cm 0.12 1 <br /> CCV umhos/cm 1000 102% 95-105 <br /> CCV umhos/cm 1000 102% 95-105 <br /> E.C. 2510B 04/15/21:204068sta Blank umhos/cm ND <I <br /> (SP 2104562-005) Dup umhos/cm 0.2% 5 <br /> Total Dissolved Solids(TFR) 2540CE 04/09/21:203818CTL Blank mg/L 3.7 20 <br /> LCS mg/L 995.0 102% 90-110 <br /> (CC 2181093-002) Dup mg/L 2.5% 5 <br /> (CC 2181093-002) _2ue mgfL 2.4% 5 <br /> hloride 300.0 04/08/21:203777MCA Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 89.3% 85-121 <br /> (CH 2172103-003) MSD mg/L 50.00 91.3% 85-121 <br /> MSRPD mg/L 10.00 1.2% <19 <br /> MS mg/L 50.00 92.3% 85-121 <br /> (VI 2142798-001) MSD mg/L 50.00 93.6% 85-121 <br /> MSRPD m 10.00 0.8% <19 <br /> 300.0 04/08/21:205201 MCA CCB mg/L 0.09 1 <br /> CCV mg/L 25.00 102% 90-110 <br /> CCB mg/L 0.10 1 <br /> CCV m 25.00 103% 90-110 <br /> Fluoride 300.0 04/08/21:203777MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 100% 87-120 <br /> (CH 2172103-003) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 1.3% 816 <br /> MS mg/L 5.000 101 % 87-120 <br /> (VI 2142798-001) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 0.3% <16 <br /> 300.0 04/08/21:205201MCA CCB mg/L 0.000 0.1 <br /> CCV mg/L 2.500 102% 90-110 <br /> CCB mg/L. 0.000 0.1 <br /> CCV m 2.500 102% 90-110 <br /> Nitrate 300.0 04/08/21:203777MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 101 % 85-119 <br /> (CH 2172103-003) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 2.0% 519 <br /> MS I m 40.00 1 100% 1 85-119 <br /> Page 7 of 9 <br />