ASTM E3318-24

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: E3318 − 23 E3318 − 24
Standard Terminology for
Standards Relating to Stormwater Control Measures
This standard is issued under the fixed designation E3318; 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 These definitions apply to many terms found in the standards of ASTM Committee E64.
1.2 This terminology standard defines terms related to stormwater control measures in the various sections of standards under the
jurisdiction of ASTM Committee E64.
1.3 Units—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 not
be regarded as non-conformance with this test method.
1.4 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
2.1 ASTM Standards:
D3977 Test Methods for Determining Sediment Concentration in Water Samples
D4959 Test Method for Determination of Water Content of Soil By Direct Heating
D6913/D6913M Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis
D7928 Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer)
Analysis
2.2 Additional References:
Standard Method SM 2540D Total Suspended Solids (SM 22nd Edition)
3. Significance and Use
3.1 The purpose of this standard is to provide uniform terminology used in the development of methods and standards relating
to ASTM Committee E64 on Stormwater Control Measures (SCMs).
This test method is under the jurisdiction of ASTM Committee E64 on Stormwater Control Measures and is the direct responsibility of Subcommittee E64.01 on Lab
Evaluation.
Current edition approved June 1, 2023Jan. 1, 2024. Published June 2023January 2024. Originally approved in 2022. Last previous edition approved in 20222023 as
E3318 – 22.E3318 – 23. DOI: 10.1520/E3318-22.10.1520/E3318-24.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American Water Works Association (AWWA), 6666 W. Quincy Ave., Denver, CO 80235, http://www.awwa.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E3318 − 24
4. Terminology
aliquot, n—a portion of a sample.
Authority Having Jurisdiction (AHJ), n—a regulatory body having authority over the certification of Manufactured Treatment
Devices (MTDs) for use within its jurisdiction.
automated sampler, n—a portable unit that can be programmed to collect discrete sequential samples on a time-weighted or
flow-weighted basis.
Best Management Practice (BMP), n—activities or structural improvements that help reduce the quantity and/or improve the
quality of stormwater runoff.
DISCUSSION—
BMPs include treatment facilities, operating procedures, and practices to control site runoff from roadways, parking lots, rooftops, and landscaped
areas. BMPs can also include the management of spillage or leaks, sludge or waste disposal, or drainage from raw material storage. Sometimes
considered synonymous with Stormwater Control Measures (SCMs).
certification, n—a certification is granted by AHJs to allow SCMs to be approved and then specified within their jurisdiction.
DISCUSSION—
The certifying body uses verification reports to determine the SCM sizing based on local treatment needs. The certification can also dictate other factors
including, structural requirements, operations and maintenance requirements, land use restrictions, etc.
clear water, n—any water free of test sediment with a background Suspended Sediment Concentration (SSC) concentration of
less than 20 mg/L.
commercially available, phrase, n—a MTD which is engineered, sold, and deployed in the field for use as a SCM.
DISCUSSION—
In some cases, the unit tested is a prototype of the units that will be offered as a product for sale once verified. The hydraulic and water quality
operational parameters are offered at nominal full-size dimension or scale. The material components of the MTD that do not affect hydraulic or water
quality performance, can be composed of alternate materials when specified for commercial use.
composite sample, n—a mixed or combined sample that is formed by combining a series of individual and discrete samples or
aliquots taken at equal volumes or specified intervals.
DISCUSSION—
Samples can be time-weighted (taken at uniform intervals of time) or flow-weighted (taken at uniform increments of flow volume).
D , n—as relates to Particle Size Distribution, D is also known as the median diameter or the median value of a particle size
50 50
distribution, it is the value of the particle diameter at 50 % in the cumulative distribution.
DISCUSSION—
For example, if the D = 20.0 μm, then 50 % by weight (dry) of the particles of a particular sample are finer than 20.0 μm.
Effective Sedimentation Area (ESA), n—the entire area within a hydrodynamic separator (HDS) where sedimentation occurs,
including any pretreatment chambers.
Effective Sedimentation Treatment Area (ESTA), n—the entire area within a HDS where treatment occurs, including any
pretreatment.
effluent, n—water discharging from a treatment SCM.
DISCUSSION—
Effluent may consist of treated flow or comingled treated and untreated flow.
effluent sampling analysis, n—a method of determining removal efficiency of a SCM by measuring the average particle
concentration, in mg/L of effluent samples as compared to the average particle concentration of influent introduced into the unit
at a given flow rate
E3318 − 24
false floor, n—for the purposes of sediment removal efficiency testing and scour testing, a temporary construct in a MTD test
device used to simulate performance of a partially loaded system for sediment removal efficiency testing.
geometrically proportional (geometric similitude), n—for the purposes of scaling a MTD, a different size MTD is considered
geometrically proportional if the functional components of the device are dimensionally proportional to the unit tested; two units
that are geometrically proportional are said to have geometric similitude.
Hydraulic Loading Rate (HLR), n—for treatment SCMs the HLR is a measure of the influent flow rate per the ESTA of the
treatment unit; the HLR is commonly expressed in units of gallons per minute per square foot (GPM/ft ).
DISCUSSION—
For HDS units the HLR is a measure of the influent flow rate (Q) per the ESTA, (HLR= Q/ESTA). The HLR can also be termed the Surface Loading
Rate (SLR).
DISCUSSION—
For filters, the HLR is the filter unit flow rate per the effective filter surface area. The filter HLR can also be called the flux or the specific flow rate
(q).
hydraulic similarity (hydraulic similitude), n—two MTDs are considered to have hydraulic similarity if the functional
components are designed
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