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ASTM C1746/C1746M-12

(Test Method)

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

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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
14-Jun-2012
ICS
13.060.30 - Sewage water
Technical Committee
C27 - Precast Concrete Products
Drafting Committee
C27.70 - Precast Concrete Products for Stormwater Management
Current Stage
Ref Project

Relations

Referred By
ASTM E3373-23 - Standard Test Method for Scour of Hydrodynamic Separators and Settling Devices
Effective Date
15-Jun-2012
Referred By
ASTM C1893-23 - Standard Practice for Laboratory Performance Verification of Hydrodynamic Separators for the Treatment of Stormwater Runoff
Effective Date
15-Jun-2012

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ASTM C1746/C1746M-12 - Standard Test Method for Measurement of Suspended Sediment Removal Efficiency of Hydrodynamic Stormwater Separators and Underground Settling DevicesASTM C1746/C1746M-12 - Standard Test Method for Measurement of Suspended Sediment Removal Efficiency of Hydrodynamic Stormwater Separators and Underground Settling Devices
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ASTM C1746/C1746M-12 - Standard Test Method for Measurement of Suspended Sediment Removal Efficiency of Hydrodynamic Stormwater Separators and Underground Settling Devices
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1746/C1746M − 12
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 D854Test Methods for Specific Gravity of Soil Solids by
Water Pycnometer
1.1 This test method concerns measurement of the effi-
D4959Test Method for Determination of Water (Moisture)
ciency of hydrodynamic separators and underground settling
Content of Soil By Direct Heating
devices in removing suspended sediment from simulated
E11Specification forWovenWireTest Sieve Cloth andTest
stormwater runoff under conditions defined herein. This test
Sieves
method is not intended for use in determining field removal
efficiency.
3. Terminology
1.2 Units tested shall be of a size commonly manufactured,
3.1 Definitions of Terms Specific to This Standard:
not a scale model. This test method is not intended to address
3.1.1 inlet (or outlet) rounding, n—radius of fillet at inside
product scaling.
pipe junction with separator structure.
1.3 This test method is not for measuring the removal
4. Summary of Test Method
efficiency of filters or the scouring potential of hydrodynamic
4.1 This test method describes procedures and equipment to
separators and underground settling devices.
measure the suspended sediment removal efficiency of hydro-
1.4 In this test method, only gravity flow operation is
dynamic separators and underground settling devices used for
addressed—performance of units operating under pressurized
treating stormwater runoff.
conditions is not addressed.
5. Significance and Use
1.5 The values stated in either SI units or inch-pound units
5.1 Each device has unique flow patterns and turbulence
are to be regarded separately as standard. The values stated in
characteristics and may exhibit a wide range of efficiencies as
each system may not be exact equivalents; therefore, each
discharge, particle-size distribution, particle density, and flow
system shall be used independently of the other. Combining
viscosity (that is, water temperature) changes. The testing
values from the two systems may result in non-conformance
procedures described in Section 8 provide a method of mea-
with the standard.
suring the removal efficiency of these devices under a given
1.6 This standard does not purport to address all of the
flow condition, flow viscosity (water temperature), and
safety concerns, if any, associated with its use. It is the
particle-size distribution and density. Therefore, the results of
responsibility of the user of this standard to establish appro-
testing represent the flow, viscosity, and particle-size distribu-
priate safety and health practices and determine the applica-
tion tested.
bility of regulatory limitations prior to use.
6. Apparatus
2. Referenced Documents
6.1 Theexperimentalsetupincludesaninfluentstraightpipe
2
2.1 ASTM Standards:
(withoutbendsorfittings)ofminimumlengthequivalenttoten
D422Test Method for Particle-Size Analysis of Soils
pipediametersor6m[20ft],whicheverisless,upstreamfrom
the test unit and effluent pipe length equivalent to three pipe
1
This test method is under the jurisdiction ofASTM Committee C27 on Precast diameterswithafree-fallconditionatitsdownstreamend.Pipe
Concrete Products and is the direct responsibility of Subcommittee C27.70 on
shall have a Manning’s roughness coefficient not greater than
Precast Concrete Products for Stormwater Management.
0.013.
Current edition approved June 15, 2012. Published July 2012. DOI: 10.1520/
C1746_C1746M-12.
6.2 The test unit shall be set up to reflect actual field
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
installation parameters to the greatest degree possible, includ-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ing inlet/outlet roundings as supplied or recommended by the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. manufacturer.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1746/C1746M − 12
6.3 Influent and effluent pipe diameters shall be the mini- 8.1.3 “Recirculated” water that passes through the test unit
mum size recommended by the manufacturer and shall be shall not be redirected into the system until it has been filtered
documented in test results, as well as pipe orientation and pipe completelythrough
...

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5.1 The principal characteristic of geomembranes is their intrinsically low permeability to a broad range of gases, vapors, and liquids, both as single-component fluids and as complex mixtures of many constituents. As low-permeable materials, geomembranes are being used in a wide range of engineering applications in geotechnical, environmental, and transportation areas as barriers to control the migration of mobile fluids and their constituents. The range of potential permeants is broad and the service conditions can differ greatly. This guide shows users test methods available for determining the permeability of geomembranes to various permeants.  
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Standard Specification for Silica-Based Sediments for the Evaluation of Stormwater Treatment Devices

SCOPE
1.1 This specification covers the minerology, specific gravity, and particle size distributions (PSDs) of silica-based sediments to be used in the laboratory performance testing of stormwater treatment devices as well as criteria defining acceptable error for the target PSDs.  
1.2 Silica-based sediment is used as a surrogate material for performance and scour determinations for some manufactured stormwater treatment devices such as hydrodynamic separators and filters. These data are used to gain regulatory approvals within certain jurisdictions.  
1.3 Acceptance of test results attained according to this specification may be subject to specific requirements set by a Quality Assurance Project Plan, a specific verification protocol, or a policy set by an Authority Having Jurisdiction (AHJ). It is advised to review one or all of the above to ensure compliance.  
1.4 The values stated in inch-pound units are to be regarded as standard, except for methods to establish and report sediment concentration and particle size. It is convention to exclusively describe sediment concentration in mg/L and particle size in mm or μm, both of which are SI units. The SI units given in parentheses are mathematical conversions, which are provided for information purposes only and are not considered standard. Reporting of test results in units other than inch-pound units shall be regarded as conforming with this test method.  
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SCOPE
1.1 This specification covers the manufacture and purchase requirements of products used for the assembly and construction of circular vertical precast reinforced concrete manholes and structures used in sewer, drainage, and water works.  
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12  
Flat Slab Tops  
13  
Risers and Conical Tops  
14  
Base Sections  
15  
Steps and Ladders  
16  
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