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Significance and Use
This test method is used to determine the filtering efficiency and flow rate of the filtration component of a sediment retention device, such as a silt fence, a silt barrier, or a silt curtain, for specific soil tested.
This test method may be used for the design of the filtration component of a sediment retention device to meet requirements of regulatory agencies in filtering efficiency or flow rate for the specific soil tested.
The designer can use this test method to determine the spacing between sediment retention devices.
This test method is intended for performance evaluation, as the results will depend on the specific soil evaluated. Unless testing with the default soil is desired, it is recommended that the user or representative perform the test to pre-approve products, as sediment retention device manufacturers are not typically equipped to handle or test soil requirements.
This test method provides a means of evaluating the filtration component of sediment retention devices with different soils under various conditions that simulate the conditions that exist in a sediment retention device installation. This test method may be used to simulate several storm events on the same sediment retention device specimen. Therefore, the number of times this test is repeated per specimen is dependent upon the user and the site conditions.
1.1 This test method is used to determine the filtering efficiency and the flow rate of the filtration component of a sediment retention device, such as a silt fence, silt barrier, or inlet protector.
1.1.1 The results are shown as a percentage for filtering efficiency and cubic metres per square metre per minute (m3/m2/min) or gallons per square foot per minute (gal/ft2/min) for flow rate.
1.1.2 The filtering efficiency indicates the percent of sediment removed from sediment-laden water.
1.1.3 The flow rate is the average rate of passage of the sediment-laden water through the filtration component of a sediment retention device.
1.2 This test method requires several specialized pieces of equipment, such as an integrated water sampler and an analytical balance, or a vacuum filtration system. At the client’s discretion the test soil is either a site-specific soil or a soil that is representative of a target default gradation.
1.3 The values stated in SI units are the standard, while the inch-pound units are provided for information. The values expressed in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D123 Terminology Relating to Textiles
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D4354 Practice for Sampling of Geosynthetics for Testing
D4439 Terminology for Geosynthetics
D4759 Practice for Determining the Specification Conformance of Geosynthetics
American Public Health Association (APHA) Standard208D Total Nonfiltrable Residue Dried at 103-105C (Total Suspended Matter) Available from American Public Health Association (APHA), 1015 Eighteenth St. NW, Washington, DC 20036.
ICS Number Code 59.080.70 (Geotextiles)
UNSPSC Code 11111501(Soil)
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ASTM D5141-11, Standard Test Method for Determining Filtering Efficiency and Flow Rate of the Filtration Component of a Sediment Retention Device, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top