TEST Turbidity (on LaMotte 2020) 100 NTU +/-1 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (on Hach 2100N/AN) 1000 NTU +/- 10 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (on Hach 43900/XR) 180 NTU +/- 2 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (AQ4500) EPA mode Turbidity (AQ4500) ISO Neph. mode Turbidity (AQ4500) IR Ratio mode Thermo Electron AQ4500 serial number Instrument calibration date Formazin Concentrate (

TEST Turbidity 6.0 NTU +/- 0.06 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity (Hach 2100N/AN and IS meters) 1.0 NTU Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 400 NTU +/- 4 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (on Lamotte 2020) 1.0 NTU Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 2.0 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

For all EPA 180.1 turbidimeters. TEST Turbidity 0.8 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 800 NTU +/- 8 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (Turner Aquafluor) 10 NTU Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity (on Hach 2100N/AN) 200 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (AQ4500) EPA mode Turbidity (AQ4500) ISO Neph. mode Turbidity (AQ4500) IR Ratio mode Thermo Electron AQ4500 serial number Instrument calibration date Formazin Concentrate (

TEST Turbidity 600 NTU +/- 6 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

Turbidity 4.0 NTU +/- 0.04 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity (on Hach 2100P) 40 NTU Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material

TEST Turbidity 1000 NTU Absorbance at 455 nm (10mm pathlength) 1.48-1.62 Lot Number of Baseline Material

TEST Turbidity (Hach 2100N/AN and IS meters) 20 NTU Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material

For Endress and Hauser, Reagecon Diagnostic and Hach 2100 AN IS turbidimeters. TEST Turbidity (on Hach 2100 AN/IS) 4000 NTU Absorbance at 455 nm (10mm pathlength) 3.26-3.50 Lot Number of Baseline Material

TEST Turbidity (AQ4500) EPA mode Turbidity (AQ4500) IR Ratio mode Thermo Electron AQ4500 serial number Instrument calibration date Formazin Concentrate (4000 NTU) lot number Formazin chec

For all EPA 180.1 turbidimeters. TEST Turbidity 0.1 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity (AQ4500) EPA mode 1 NTU +/- 0.05 Turbidity (AQ4500) ISO Neph. mode Turbidity (AQ4500) IR Ratio mode Thermo Electron AQ4500 serial number Instrument calibration date Formazi

TEST Turbidity (Hach 2100N/AN and IS meters) 0.1 NTU Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 900 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

For all EPA 180.1 turbidimeters. TEST Turbidity 0.6 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity (LaMotte 2020) 10 NTU +/-0.1 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity (on Hach 2100 N/AN meter) 4000 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity 30 NTU +/- 0.3 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 50 NTU +/- 0.5 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 200 NTU +/- 2 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity (Hach 2100P) 5 NTU +/- 0.05 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material