ASTM E3373-24 PDF

Full title and description

Standard Test Method for Scour of Hydrodynamic Separators and Settling Devices — a laboratory test method that defines procedures to evaluate resuspension and washout (scour) of previously captured sediment from manufactured hydrodynamic stormwater separators and underground settling devices (manufactured treatment devices, MTDs). The method describes unit requirements, test conditions, measurement and reporting conventions used to determine scour potential under online and offline configurations.

Abstract

This test method provides a reproducible laboratory procedure for measuring the tendency of sediment captured in hydrodynamic separators and settling devices to be resuspended and washed out (scour) when subjected to specified hydraulic conditions. It is intended to help device manufacturers, test laboratories, regulators and authorities having jurisdiction (AHJs) assess whether a given MTD will retain previously captured solids under realistic flow scenarios and meet verification or permit requirements.

General information

• Status: Active / Current standard (latest edition published as E3373‑24).
• Publication date: January 1, 2024 (designated E3373‑24).
• Publisher: ASTM International (under Committee E64 on Stormwater Control Measures).
• ICS / categories: 13.060.10 (Water of natural resources) — stormwater control measures, sediment testing.
• Edition / version: E3373‑24 (2024 edition).
• Number of pages: 4 pages (short test method document).

Key bibliographic and edition details above are drawn from published standards information and the ASTM bibliographic listings.

Scope

The scope covers laboratory testing of full‑size hydrodynamic stormwater separators and underground settling devices to measure resuspension and washout (scour) of sediment previously captured by the unit. Units tested must be of commercially produced size (no scale models); substitute materials for housings are permitted only when operational components remain full size and representative. The method provides procedures for testing devices in both offline and online configurations and specifies reporting conventions for sediment concentration and particle size.

Key topics and requirements

• Defines test setup and boundary conditions for scour/resuspension experiments on manufactured treatment devices (MTDs).
• Requires testing of full‑size units (scale models not permitted) or approved full‑size operational components.
• Specifies procedures for introducing, measuring and reporting sediment concentration and particle size (SI units recommended for sediment data).
• Provides evaluation criteria for both offline and online device configurations.
• Notes that acceptance of test results may be subject to Quality Assurance Project Plans, verification protocols, or local AHJ requirements.

Typical use and users

Used by independent testing laboratories, device manufacturers, engineering consultants, municipal/regulatory authorities and verification/approval programs to quantify scour performance of hydrodynamic separators and settling devices. Typical applications include product verification, design validation, regulatory submissions, and comparative performance testing during product development.

Related standards

Standards commonly used alongside or referenced when evaluating hydrodynamic separators include: ASTM C1745/C1745M (measurement of hydraulic characteristics of hydrodynamic stormwater separators and underground settling devices) and ASTM C1893 (laboratory performance verification practice for hydrodynamic separators). These related methods address hydraulic characterization and verification test criteria that complement the scour test method.

Keywords

hydrodynamic separator; manufactured treatment device (MTD); scour; resuspension; washout; settling device; stormwater control measure; sediment concentration; particle size; laboratory test method; E3373.

FAQ

Q: What is this standard?

A: ASTM E3373‑24 is a laboratory test method titled "Standard Test Method for Scour of Hydrodynamic Separators and Settling Devices" that defines procedures to measure resuspension and washout (scour) of sediment from manufactured hydrodynamic separators and underground settling devices.

Q: What does it cover?

A: It covers laboratory testing of full‑size hydrodynamic stormwater separators and settling devices to quantify the potential for previously captured solids to be resuspended and washed out under defined hydraulic conditions; it includes unit requirements, test conditions, measurement and reporting conventions.

Q: Who typically uses it?

A: Device manufacturers, independent test laboratories, verification/approval programs, municipal stormwater authorities, consulting engineers and AHJs use the method for product verification, regulatory submissions, comparative testing and design validation.

Q: Is it current or superseded?

A: The E3373‑24 edition (published January 1, 2024) is the current edition. Earlier editions (for example E3373‑23) have been superseded by the 2024 designation; consult ASTM or your standards provider for the official status and revision history.

Q: Is it part of a series?

A: E3373 is part of a family of ASTM test methods and practices used to evaluate hydrodynamic separators and MTDs (for example hydraulic characteristic measurement and laboratory performance verification standards such as C1745/C1745M and C1893), and is maintained by ASTM Committee E64 on Stormwater Control Measures.

Q: What are the key keywords?

A: Hydrodynamic separator; scour; resuspension; manufactured treatment device (MTD); settling device; stormwater; sediment concentration; particle size; verification; E3373‑24.