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May 5, 2021 Lab ID : STK2135321 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Metals <br /> Sodium 200.7 04/27/21:206202AC CCB pprn -0.03 1 <br /> inc 200.7 MS ug/L 800.0 101% 75-125 <br /> (SP 2105284-001) MSD ug/L 800.0 98.4% 75-125 <br /> MSRPD ug/L 800.0 2.7% :520.0 <br /> 200.7 04/28/21:206266AC CCV ppm 1.000 102% 90-110 <br /> CCB ppm -0.0001 0.02 <br /> CCV ppm 1.000 103% 90-110 <br /> CCB PPM -0.0006 0.02 <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B STK2135348-002) Dup mg/L 0.2% 10 <br /> 2320B 04/29/21:206304AMM CCV mg/L 235.8 94.1% 90-110 <br /> CCV mg/L 235.8 96.5% 90-110 <br /> Bicarbonate 2320B (STK2135348-002) Dup mg/L 0.2% 10 <br /> Carbonate 2320B (STK2135348-002) Dup mg/L 0.0 10 <br /> Hydroxide 2320B (STK2135348-002) Dup mg/L 0.0 10 <br /> Conductivity 2510B 04/29/21:206262sta JCBumhos/cm 0.09 1 <br /> CCV umhos/cm 1000 99.4% 95-105 <br /> CCV umhos/cm 1000 99.4% 95-105 <br /> E.C. 2510B 04/29/21:204660sta Blank umhos/cm ND <1 <br /> SP 2105248-002 Dup umhos/cm 0.010 1 <br /> Total Dissolved Solids(TFR) 2540CE 04/22/21:204369CTL Blank mg/L ND <20 <br /> LCS mg/L 995.0 100% 90-110 <br /> (SP 2105284-001) Dup mg/L 0.5% 5 <br /> SP 2105284-001) Dup mg/L 1.6% 5 <br /> Chloride 300.0 04/21/21:204260MCA Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 99.6% 85-121 <br /> (STK2135321-001) MSD mg/L 50.00 99.8% 85-121 <br /> MSRPD mg/L 10.00 0.2% <_19 <br /> MS mg/L 50.00 98.2% 85-121 <br /> (VI 2142896-001) MSD mg/L 50.00 98.1% 85-121 <br /> MSRPD mg/L 10.00 0.1% :19 <br /> 300.0 04/21/21:205910MCA CCB mg/L 0.09 1 <br /> CCV mg/L 25.00 102% 90-110 <br /> CCB mg/L 0.1 1 <br /> CCV mg/L 25.00 102% 90-110 <br /> Fluoride 300.0 04/21/21:204260MCA Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 104% 87-120 <br /> (STK2135321-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 0.07% :516 <br /> MS mg/L 5.000 104% 87-120 <br /> (VI 2142896-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 0.08% _<16 <br /> 300.0 04/21/21:205910MCA 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 mg/L 2.500 102% 90-110 <br /> Nitrate 300.0 04/21/21:204260MCA Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 103% 90-110 <br /> MS mg/L 40.00 96.8% 85-119 <br /> (STK2135321-001) MSD mg/L 40.00 97.1% 85-119 <br /> MSRPD mg/L 10.00 0.1% <_19 <br /> MS m L 40.00 97.5% 85-119 <br /> Page 7 of 9 <br />