1 1 x 577 ERA PT pH, WP One 250 mL whole-volume bottle is ready to analyze. pH 5-10 S.U. WP 316: opens – May 17, closes - July 1 2 1 X 581 ERA PT Minerals, WP One 500 mL whole-volume bottle is ready to analyze. Alkalinity as CaCO3 25-400 mg/L Chloride 35-275 mg/L Conductivity at 25°C 200-1200 µmhos/cm Fluoride 0.4-4 mg/L Potassium 4-40 mg/L Sodium 10-100 mg/L Sulfate 5-125 mg/L Total Dissolved Solids at 180°C 140-800 mg/...

1 1 x 577 ERA PT pH, WP One 250 mL whole-volume bottle is ready to analyze. pH 5-10 S.U. WP 316: opens – May 17, closes - July 1 2 1 X 581 ERA PT Minerals, WP One 500 mL whole-volume bottle is ready to analyze. Alkalinity as CaCO3 25-400 mg/L Chloride 35-275 mg/L Conductivity at 25°C 200-1200 µmhos/cm Fluoride 0.4-4 mg/L Potassium 4-40 mg/L Sodium 10-100 mg/L Sulfate 5-125 mg/L Total Dissolved Solids at 180°C 140-800 mg/L Total Solids at 105°C 140-800 mg/L WP 316: opens – May 17, closes - July 1 3 1 X 891 ERA PT Sulfide, WP One 10 mL flame-sealed ampule yields up to 1 liter after dilution. Preserved sample is guaranteed stable. Analyze for sulfide by titrimetric or colorimetric methods or ISE. Sulfide 2-10 mg/L WP 316: opens – May 17, closes - July 1 4 1 X 4120 ERA PT Oil & Grease Concentrate, WP One 23 mL screw-cap vial yields up to 2 liters after dilution. n-Hexane Extractable Material(O&G)(Grav) 20-200 mg/L WP 316: opens – May 17, closes - July 1 5 2 X 212 ERA PT Dissolved Oxygen, WP Oxygen, dissolved in water - 500mL Oxygen, Dissolved 1-20 mg/L WP 321: opens – October 15, closes - November 29 6 1 X 642 ERA PT Total Petroleum Hydrocarbons (TPH) in Water, WP One liter whole-volume bottle is ready to analyze for TPH without interfering fatty acids. TPH (Gravimetric) 20-200 mg/L TPH (IR) 20-200 mg/L WP 321: opens – October 15, closes - November 29 7 1 X 892 ERA PT Surfactants-MBAS, WP One 15 mL screw-cap vial yields up to 2 liters

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