EPA-NERL: 160.5: Determination Settleable Matter in Water Using an Imhoff Cone

Summary
Analytes
Revision
Data and Sites

Official Method Name

Settleable Matter (Volumetric, Imhoff Cone)

Current Revision

Issued 1974

Media

WATER

Instrumentation

Imhoff Cone

Method Subcategory

Physical

Method Source

EPA-NERL

Citation

Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)

Brief Method Summary

Settleable matter is measured volumetrically with an Imhoff cone.

The procedure to be used for this determination is found in: Standard Methods for the Examination of Water and Wastewater, 14th Edition, p. 95 Method 208F, Procedure 3a (1975).

Scope and Application

This method determines settleable matter in surface and saline waters, domestic and industrial wastes.

Applicable Concentration Range

Above 0.2 ml/l/hr.

Interferences

None Provided.

Quality Control Requirements

None.

Sample Handling

Refrigerate at 4^oC.

Maximum Holding Time

48 hours (MCAWW, Table 1).

Relative Cost

Less than $50

Sample Preparation Methods

This method has 1 analyte associated with it.

Analyte	Detection Level	Bias	Precision	Pct False Positive	Pct False Negative	Spiking Level
Settleable Solids(E-11949) Settleable Matter Settleable Solids Solids, settleable	0.200 mL/L/hr	N/A	N/A

Precision Descriptor Notes:
Detection Level Note:	The practical lower limit of the determination is about 0.2 mL/L/hr.

Revision	PDF/Link
Issued 1974

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EPA-NERL: 160.5: Determination Settleable Matter in Water Using an Imhoff Cone

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