Table T6.

Table T6. The standard deviations for chemical analyses.

Constituent

Method

1 standard deviation

Alkalinity
Titration
<1.5%

Chloride
Titration
<0.4%

Silica
IC
~5%

Phosphate
IC
~5%

Ammonia
IC
~5%

Potassium
IC
<6%

Magnesium
IC
<2%

Calcium
IC
<2%

Sulfate
IC
<4%

Sodium
IC
<5%

Constituent	Method	1 standard deviation
Alkalinity	Titration	<1.5%
Chloride	Titration	<0.4%
Silica	IC	~5%
Phosphate	IC	~5%
Ammonia	IC	~5%
Potassium	IC	<6%
Magnesium	IC	<2%
Calcium	IC	<2%
Sulfate	IC	<4%
Sodium	IC	<5%

Note: IC = ion chromatography.