Sample Containers, Preservations, and Hold Times

Analysis	Matrix	Container Type	Minimum Sample Volume	Preservation	Maximum Holding Time
Alkalinity	Water	Plastic	250 mL	Ice, < 6°C	14 days
Ammonia Nitrogen	Water	Plastic	250 mL	H₂SO₄, pH < 2 Ice, < 6^oC	28 days
Biological Oxygen Demand, 5-day	Water	Plastic	1000 mL	Ice, < 6°C	48 hours
Carbonaceous Biological Oxygen Demand, 5-day	Water	Plastic	1000 mL	Ice, < 6°C	48 hours
Chemical Oxygen Demand	Water	Plastic	250 mL	H₂SO₄, pH < 2 Ice, < 6°C	28 days
Chloride	Water	Plastic	250 mL	Ice, < 6°C	28 days
Conductivity	Water	Plastic	250 mL	Ice, < 6°C	28 days
Dissolved Oxygen	Water	Plastic	250 mL	None	Immediately
Fecal Coliform by Membrane Filtration	Water	Sterile Plastic	250 mL	Ice, < 6°C	6 hours
Fecal Coliform by Multiple Tube Fermentation	Water	Sterile Plastic	250 mL	Ice, <6°C	6 hours
Fecal Coliform by Multiple Tube Fermentation	Solid	Sterile Plastic	200 g	Ice, < 6°C	30 hours
Hardness, Total	Water	Plastic	250 mL	HNO₃, pH < 2 Ice, < 6°C	14 days
Paint Filter Liquids	Water	Plastic	1000 mL	Ice, < 6°C	48 hours
pH, Liquid	Water	Plastic	100 mL	None	Immediately
pH, Solid	Solid	Plastic	25 g	None	Immediately
Salinity	Water	Plastic	100 mL	Ice, < 6°C	28 days
Solids, Total Suspended	Water	Plastic	500 mL	Ice, < 6°C	7 days
Solids, Total Dissolved	Water	Plastic	250 mL	Ice, < 6°C	7 days
Solids, Total Volatile Suspended	Water	Plastic	250 mL	Ice, < 6°C	7 days
Solids, Settleable	Water	Plastic	1000 mL	Ice, < 6°C	48 hours
Solids, Percent and Percent Moisture	Solid	Plastic	25 g	Ice, < 6°C	7 days
Sulfate, Total	Water	Plastic	250 mL	Ice, < 6°C	28 days
Temperature	Water	Not Applicable	Not Applicable	None	Immediately
Total Residual Chlorine	Water	Plastic	100 mL	Ice, < 6°C	Immediately
Total Coliform by Multiple Tube Fermentation	Water	Sterile Plastic	250 mL	Ice, < 6°C	6 hours
Turbidity	Water	Plastic	250 mL	Ice, < 6°C	48 hours

Sample Containers, Preservations, and Hold Times

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