ASTM C1746/C1746M-19

Standard Test Method for Measurement of Suspended Sediment Removal Efficiency of Hydrodynamic Stormwater Separators and Underground Settling Devices

SIGNIFICANCE AND USE
5.1 Each device has unique flow patterns and turbulence characteristics and may exhibit a wide range of efficiencies as discharge, particle-size distribution, particle density, and flow viscosity (that is, water temperature) changes. The testing procedures described in Section 8 provide a method of measuring the removal efficiency of these devices under a given flow condition, flow viscosity (water temperature), and particle-size distribution and density. Therefore, the results of testing represent the flow, viscosity, and particle-size distribution tested.
SCOPE
1.1 This test method concerns measurement of the efficiency of hydrodynamic separators and underground settling devices in removing suspended sediment from simulated stormwater runoff under conditions defined herein. This test method is not intended for use in determining field removal efficiency.  
1.2 Units tested shall be of a size commonly manufactured, not a scale model. This test method is not intended to address product scaling.  
1.3 This test method is not for measuring the removal efficiency of filters or the scouring potential of hydrodynamic separators and underground settling devices.  
1.4 In this test method, only gravity flow operation is addressed—performance of units operating under pressurized conditions is not addressed.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 14-May-2019
• ICS: 13.060.30 - Sewage water
• Technical Committee: E64 - Stormwater Control Measures
• Drafting Committee: E64.01 - Lab Evaluation

Relations

• Refers: ASTM D4959-16 - Standard Test Method for Determination of Water Content of Soil By Direct Heating
• Effective Date: 01-Jan-2016

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1746/C1746M − 19
Standard Test Method for
Measurement of Suspended Sediment Removal Efficiency of
Hydrodynamic Stormwater Separators and Underground
1
Settling Devices
This standard is issued under the fixed designation C1746/C1746M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This test method concerns measurement of the effi- 2.1 ASTM Standards:
ciency of hydrodynamic separators and underground settling D422Test Method for Particle-SizeAnalysis of Soils (With-
3
devices in removing suspended sediment from simulated drawn 2016)
stormwater runoff under conditions defined herein. This test D854Test Methods for Specific Gravity of Soil Solids by
method is not intended for use in determining field removal Water Pycnometer
efficiency. D4959Test Method for Determination of Water Content of
Soil By Direct Heating
1.2 Units tested shall be of a size commonly manufactured,
E11Specification forWovenWireTest Sieve Cloth andTest
not a scale model. This test method is not intended to address
Sieves
product scaling.
1.3 This test method is not for measuring the removal
3. Terminology
efficiency of filters or the scouring potential of hydrodynamic
3.1 Definitions of Terms Specific to This Standard:
separators and underground settling devices.
3.1.1 inlet (or outlet) rounding, n—radius of fillet at inside
1.4 In this test method, only gravity flow operation is
pipe junction with separator structure.
addressed—performance of units operating under pressurized
conditions is not addressed.
4. Summary of Test Method
1.5 The values stated in either SI units or inch-pound units
4.1 Thistestmethoddescribesproceduresandequipmentto
are to be regarded separately as standard. The values stated in
measure the suspended sediment removal efficiency of hydro-
each system are not necessarily exact equivalents; therefore, to
dynamic separators and underground settling devices used for
ensure conformance with the standard, each system shall be
treating stormwater runoff.
used independently of the other, and values from the two
systems shall not be combined.
5. Significance and Use
1.6 This standard does not purport to address all of the
5.1 Each device has unique flow patterns and turbulence
safety concerns, if any, associated with its use. It is the
characteristics and may exhibit a wide range of efficiencies as
responsibility of the user of this standard to establish appro-
discharge, particle-size distribution, particle density, and flow
priate safety, health, and environmental practices and deter-
viscosity (that is, water temperature) changes. The testing
mine the applicability of regulatory limitations prior to use.
procedures described in Section 8 provide a method of mea-
1.7 This international standard was developed in accor-
suring the removal efficiency of these devices under a given
dance with internationally recognized principles on standard-
flow condition, flow viscosity (water temperature), and
ization established in the Decision on Principles for the
particle-size distribution and density. Therefore, the results of
Development of International Standards, Guides and Recom-
testing represent the flow, viscosity, and particle-size distribu-
mendations issued by the World Trade Organization Technical
tion tested.
Barriers to Trade (TBT) Committee.
1 2
This test method is under the jurisdiction of ASTM Committee E64 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Stormwater Control Measures and is the direct responsibility of Subcommittee contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
E64.01 on Lab Evaluation. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 15, 2019. Published June 2019. Originally the ASTM website.
3
approved in 2012. Last previous edition approved in 2012 as C1746/C1746M–12. The last approved version of this historical standard is referenced on
DOI: 10.1520/C1746_C1746M-19. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1746/C1746M − 19
6. Apparatus
∆t = sampling duration.
6.1 Theexperimentalsetupincludesaninfluentstraightpipe
8. Procedure
(withoutbendsorfittings)ofminimumlengthequivalenttoten
pipediametersor6m[20ft],whicheverisless,upstreamfrom
8.1 Suspe
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1746/C1746M − 12 C1746/C1746M − 19
Standard Test Method for
Measurement of Suspended Sediment Removal Efficiency of
Hydrodynamic Stormwater Separators and Underground
1
Settling Devices
This standard is issued under the fixed designation C1746/C1746M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method concerns measurement of the efficiency of hydrodynamic separators and underground settling devices in
removing suspended sediment from simulated stormwater runoff under conditions defined herein. This test method is not intended
for use in determining field removal efficiency.
1.2 Units tested shall be of a size commonly manufactured, not a scale model. This test method is not intended to address
product scaling.
1.3 This test method is not for measuring the removal efficiency of filters or the scouring potential of hydrodynamic separators
and underground settling devices.
1.4 In this test method, only gravity flow operation is addressed—performance of units operating under pressurized conditions
is not addressed.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.6 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.
1.6 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
3
D422 Test Method for Particle-Size Analysis of Soils (Withdrawn 2016)
D854 Test Methods for Specific Gravity of Soil Solids by Water Pycnometer
D4959 Test Method for Determination of Water Content of Soil By Direct Heating
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 inlet (or outlet) rounding, n—radius of fillet at inside pipe junction with separator structure.
1
This test method is under the jurisdiction of ASTM Committee C27 on Precast Concrete Products and is the direct responsibility of Subcommittee C27.70 on Precast
Concrete Products for Stormwater Management.
Current edition approved June 15, 2012May 15, 2019. Published July 2012June 2019. Originally approved in 2012. Last previous edition approved in 2012 as
C1746/C1746M – 12. DOI: 10.1520/C1746_C1746M-12.10.1520/C1746_C1746M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1746/C1746M − 19
4. Summary of Test Method
4.1 This test method describes procedures and equipment to measure the suspended sediment removal efficiency of
hydrodynamic separators and underground settling devices used for treating stormwater runoff.
5. Significance and Use
5.1 Each device has unique flow patterns and turbulence characteristics and may exhibit a wide range of efficiencies as
discharge, particle-size distribution, particle density, and flow viscosity (that is, water temperature) changes. The testing procedures
described in Section 8 provide a meth
...