iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
ASTM

ASTM C1745/C1745M-11

(Test Method)

Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices

Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices

SIGNIFICANCE AND USE
Each device has unique flow patterns and turbulence characteristics. In addition, each device exhibits a wide range of efficiencies as discharge, particle size, particle density, and flow viscosity (that is, water temperature) change. The testing procedure in Section 7 will help develop the parameters necessary to input into a function that describes the performance of a device under a wide range of application conditions.
SCOPE
1.1 This test method concerns measurement of selected hydraulic characteristics of hydrodynamic separators and underground settling devices critical to their function as stormwater treatment devices.
1.2 Units tested shall be of a size commonly manufactured, not a scale model.
1.3 As each stormwater treatment device is unique in design, so are its hydraulic characteristics (flow versus head and loss coefficients). A sufficient number of accurately measured data points are needed to define properly the hydraulic characteristics of each test unit. Therefore, it is imperative that the unit setup and subsequent testing methodologies be well defined and executed to ensure accurate flow and elevation data.
1.4 This test method addresses gravity flow operation only. It does not address performance of units operating under pressurized conditions.
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-Sep-2011
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 C1893-23 - Standard Practice for Laboratory Performance Verification of Hydrodynamic Separators for the Treatment of Stormwater Runoff
Effective Date
15-Sep-2011
Referred By
ASTM E3373-23 - Standard Test Method for Scour of Hydrodynamic Separators and Settling Devices
Effective Date
15-Sep-2011

Buy Standard

ASTM C1745/C1745M-11 - Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling DevicesASTM C1745/C1745M-11 - Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices
PreviousNext
Standard
ASTM C1745/C1745M-11 - Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices
English language
3 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)


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: C1745/C1745M − 11
Standard Test Method for
Measurement of Hydraulic Characteristics of Hydrodynamic
Stormwater Separators and Underground Settling Devices
This standard is issued under the fixed designation C1745/C1745M; 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 D3858 Test Method for Open-Channel Flow Measurement
of Water by Velocity-Area Method
1.1 This test method concerns measurement of selected
D4409 Test Method for Velocity Measurements of Water in
hydraulic characteristics of hydrodynamic separators and un-
Open Channels with Rotating Element Current Meters
derground settling devices critical to their function as storm-
D5089 Test Method for Velocity Measurements of Water in
water treatment devices.
Open Channels with Electromagnetic Current Meters
1.2 Units tested shall be of a size commonly manufactured,
D5242 Test Method for Open-Channel Flow Measurement
not a scale model.
of Water with Thin-Plate Weirs
1.3 As each stormwater treatment device is unique in D5389 Test Method for Open-Channel Flow Measurement
by Acoustic Velocity Meter Systems
design, so are its hydraulic characteristics (flow versus head
and loss coefficients). A sufficient number of accurately mea- D5413 Test Methods for Measurement of Water Levels in
Open-Water Bodies
sured data points are needed to define properly the hydraulic
characteristics of each test unit. Therefore, it is imperative that D5640 Guide for Selection of Weirs and Flumes for Open-
Channel Flow Measurement of Water
the unit setup and subsequent testing methodologies be well
defined and executed to ensure accurate flow and elevation 2.2 ASME Standard:
data. MFC-3M Measurement of Fluid Flow in Pipes Using
Orifice, Nozzle, and Venturi
1.4 This test method addresses gravity flow operation only.
It does not address performance of units operating under
3. Terminology
pressurized conditions.
3.1 Definitions of Terms Specific to This Standard:
1.5 The values stated in either SI units or inch-pound units
3.1.1 inlet (or outlet) rounding, n—radius of fillet at inside
are to be regarded separately as standard. The values stated in
pipe junction with separator structure.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
4. Summary of Test Method
values from the two systems may result in non-conformance
4.1 This test method describes procedures and equipment
with the standard.
required to measure the hydraulic characteristics of hydrody-
1.6 This standard does not purport to address all of the
namic separators and underground settling devices used for
safety concerns, if any, associated with its use. It is the
treating stormwater runoff.
responsibility of the user of this standard to establish appro-
4.2 Other standards that may be useful to reference include:
priate safety and health practices and determine the applica-
Test Methods D3858, D4409, D5089, D5242, D5389, D5413,
bility of regulatory limitations prior to use.
Guide D5640, and ASME MFC-3M (see Section 2).
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 Each device has unique flow patterns and turbulence
characteristics. In addition, each device exhibits a wide range
This test method is under the jurisdiction ofASTM Committee C27 on Precast
of efficiencies as discharge, particle size, particle density, and
Concrete Products and is the direct responsibility of Subcommittee C27.70 on
flow viscosity (that is, water temperature) change. The testing
Precast Concrete Products for Stormwater Management.
procedure in Section 7 will help develop the parameters
Current edition approved Sept. 15, 2011. Published October 2011. DOI:
10.1520/C1745_C1745M-11.
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 Available from American Society of Mechanical Engineers (ASME), ASME
Standards volume information, refer to the standard’s Document Summary page on International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
the ASTM website. www.asme.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1745/C1745M − 11
necessary to input into a function that describes the perfor- of each test. The average temperature shall be used in data
mance of a device under a wide range of application condi- reduction and reporting.
tions.
NOTE 2—Tests may be run outside of specified temperature range with
a clearly stated deviation from the test method included in results
6. Apparatus (explicitly indicate temperatures as tested).
6.1 The test unit shall be set up to reflect actual field
8. Procedure
installation parameters to the greatest degree possible. Influent
8.1 All associated instrumentation shall be calibrated or
and effluent pipes shall have a Manning’s roughness coefficient
verified or both to the manufacturer’s specification before
not greater than 0.013 and shall be the minimum diameter
testing. Flow conditions shall be stable for a minimum of three
recommended by the device manufacturer. Pipe type, diameter,
system volume equivalents (residence time) before commence-
slope(2to3 %),orientation,andinlet/outletroundingsshallbe
ment of data collection.
recorded and reported for each test. The influent pipe shall be
a minimum of ten pipe diameters in length, or 6 m [20 ft]
NOTE 3—Calibration procedures for instrumentation used may vary
whichever is less, to ensure a uniform approach flow to the test
depending on the measurement tool used and manufacturer recommenda-
tions. This is acceptable as long as measurements are ensured with
unit, and an effluent pipe of length equivalent to three pipe
accuracy and tolerances stated in 7.1.2.
diameters with a free-
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

ASTM
ASTM C913-23(Specification)
Standard Specification for Precast Concrete Water and Wastewater Structures

SCOPE
1.1 This specification covers the recommended design requirements and manufacturing practices for monolithic or sectional precast concrete water and wastewater structures with the exception of concrete pipe, box culverts, utility structures, septic tanks, grease interceptor tanks, and items included under the scope of Specification C478/C478M.  
Note 1: Water and wastewater structures are defined as solar heating reservoirs, cisterns, holding tanks, leaching tanks, extended aeration tanks, wet wells, pumping stations, distribution boxes, oil-water separators, treatment plants, manure pits, catch basins, drop inlets, and similar structures.
Note 2: Installation and sealant requirements should receive special consideration due to special features of the application.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 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.  
1.4 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.

  • Technical specification
    6 pages
    English language
    sale 15% off
  • Technical specification
    6 pages
    English language
    sale 15% off
ASTM
ASTM C1227-23(Specification)
Standard Specification for Precast Concrete Septic Tanks

ABSTRACT
This specification covers monolithicor sectional precast concrete septic tanks. The following materials shall be used for manufacturing concrete septic tank: cement, aggregates, water, admixtures, steel reinforcement, concrete mixtures, forms, concrete placement, fibers, and sealants. The precast concrete sections shall be cured. Structural design of the septic tanks shall be by calculation or by performance. Concrete strength, reinforcing steel placement, and openings shall also be considered in the design. The physical design requirements include: capacity, shape, compartments, influent and effluent pipes, baffles and outlet devices, and openings in top slab. The following tests shall also be done: proof testing, leakage testing, vacuum testing, and water-pressure testing.
SCOPE
1.1 This specification covers design requirements, manufacturing practices, and performance requirements for monolithic or sectional precast concrete septic tanks.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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.  
1.4 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.

  • Technical specification
    6 pages
    English language
    sale 15% off
  • Technical specification
    6 pages
    English language
    sale 15% off
ASTM
ASTM E1198-24(Practice)
Standard Practice for Sampling Zooplankton with Pumps

SIGNIFICANCE AND USE
5.1 The advantages of collecting zooplankton with pumps are as follows:  
5.1.1 Sample size is more accurately controlled than with nets.  
5.1.2 Discrete samples can be more easily obtained both vertically and horizontally.  
5.1.3 Multiple or replicate samples can be more easily obtained.  
5.1.4 The pumps are adaptable to a variety of ecosystems less than 30 m deep.  
5.1.5 Sampling efficiency does not decrease with sample size.  
5.2 The disadvantages of collecting zooplankton with pumps are as follows:  
5.2.1 Pumps are bulky and require an electrical source.  
5.2.2 Pumps are generally more costly than nets.  
5.2.3 Pumps generally discriminate against collecting macroplankton.  
5.2.4 Pump intake tubes may be avoided by the more motile zooplankton forms.  
5.2.5 Requires a long, bulky, intake tube for deep water sampling.  
5.3 There are several special considerations that should be observed when collecting zooplankton with a pump. They are:  
5.3.1 Some pumps can fragment zooplankton and induce mortality due to their design.  
5.3.2 The pump hose must be cleared before taking the next sample.
SCOPE
1.1 This practice covers the procedures for obtaining qualitative/quantitative samples of a zooplankton community by use of pumping systems.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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.  
1.4 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.

  • Standard
    2 pages
    English language
    sale 15% off
  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM E1200-24(Practice)
Standard Practice for Preserving Zooplankton Samples

SIGNIFICANCE AND USE
5.1 Calcium Carbonate (CaCO3) buffered formalin (3 % to 5 %) can be used as a permanent preservative for zooplankton. Lugol’s iodine solution can be used to preserve zooplankton for up to one year. Thirty percent ethanol, 30 % glutaraldehyde, or 25 % vinegar (can use 3 % acetic acid solution) can be used for more temporary storage and preservation of zooplankton samples. A 25 % vinegar solution is preferred to preserve soft-bodied planktonic coelenterates.
SCOPE
1.1 This practice describes the proper procedures for preserving zooplankton samples with either formaldehyde, ethanol, glutaraldehyde, Lugol’s iodine solution, or vinegar (acetic acid).  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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.  
1.4 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.

  • Standard
    2 pages
    English language
    sale 15% off
  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM E1199-24(Practice)
Standard Practice for Sampling Zooplankton with a Clarke-Bumpus Plankton Sampler

SIGNIFICANCE AND USE
5.1 The advantages of the Clarke-Bumpus plankton sampler are as follows:  
5.1.1 It will sample a discrete depth or multiple depths, depending upon the sampling design.  
5.1.2 It is a slow to medium speed sampler requiring a towing speed of three to five knots.  
5.1.3 The sample size can be easily controlled.  
5.1.4 The sampler is lightweight and can be used without auxiliary equipment.  
5.1.5 It has a relatively high filtration efficiency factor of 0.88.  
5.1.6 It is a versatile sampler and can be used in all but the shallowest waters.  
5.1.7 The flowmeter records the amount of water that passes into the net.  
5.1.8 Overspill of water at the mouth of the net due to excess speed of towing is of minimal consequence.  
5.2 The disadvantages of the Clarke-Bumpus plankton sampler are as follows:  
5.2.1 The flowmeter requires frequent maintenance including calibration and lubrication.  
5.2.2 It is not suitable for use in very small areas or shallow waters.  
5.3 There are several special considerations that shall be observed when using a Clarke-Bumpus plankton sampler. They are:  
5.3.1 The flowmeter should be calibrated and serviced frequently to ensure efficient and accurate operation.  
5.3.2 The sampler is relatively fragile, particularly the closing device and flowmeter. This necessitates careful deployment and recovery procedures.  
5.3.3 Following each collection, the net must be thoroughly washed.  
5.3.4 Special attention must be given to the strength of the cable and its attachment to avoid loss of the sampler.  
5.3.5 The sampler should not be used in beds of macrophytes, in waters containing submerged objects, or close to the bottom.  
5.3.6 The net should be inspected frequently for pin-size holes, tears, net deterioration, and other anomalies.  
5.3.7 Following use, the wet net should be suspended full length in the air in subdued light and allowed to dry.
SCOPE
1.1 This practice covers the procedures for obtaining quantitative samples of a zooplankton community by use of a Clarke-Bumpus plankton sampler.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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.  
1.4 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.

  • Standard
    2 pages
    English language
    sale 15% off
  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM C1745/C1745M-24(Test Method)
Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices

SIGNIFICANCE AND USE
5.1 Each device has unique flow patterns and turbulence characteristics. In addition, each device exhibits a wide range of efficiencies as discharge, particle size, particle density, and flow viscosity (that is, water temperature) change. The testing procedure in Section 7 will help develop the parameters necessary to input into a function that describes the performance of a device under a wide range of application conditions. Specifically, this test standard produces a characteristic curve that describes the hydraulic head-discharge relationship in a hydrodynamic separator over a range of flow rates typical in system operation.
SCOPE
1.1 This test method concerns measurement of selected hydraulic characteristics of hydrodynamic separators and underground settling devices critical to their function as stormwater treatment devices.  
1.2 Units tested shall be of a size commonly manufactured and available for purchase. In order to facilitate testing it is permissible to substitute alternate materials for the housing and structural components of the test units if operational components are at full size, with identical dimensions, configurations and materials specified for commercial use. Scale models are not permissible.  
1.3 As each stormwater treatment device is unique in design, so are its hydraulic characteristics (flow versus head and loss coefficients). A sufficient number of accurately measured data points are needed to properly define the hydraulic characteristics of each test unit. Therefore, it is imperative that the unit setup and subsequent testing methodologies be well defined and executed to ensure accurate flow and elevation data.  
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 not be regarded as non-conformance with this test method.  
1.5 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.  
1.6 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.

  • Standard
    3 pages
    English language
    sale 15% off
  • Standard
    3 pages
    English language
    sale 15% off
ASTM
ASTM D3974-09(2023)(Practice)
Standard Practices for Extraction of Trace Elements from Sediments

SIGNIFICANCE AND USE
5.1 Industrialized and urban areas have been found to deposit a number of toxic elements into environments where those elements were previously either not present or were found in trace amounts. Consequently, it is important to be able to measure the concentration of these pollution-deposited elements to properly study pollution effects.  
5.2 This procedure is concerned with the pollution-related trace elements that are described in 4.1 rather than those elements incorporated in the silicate lattices of the minerals from which the sediments were derived. These pollution-related trace elements are released into the water and readsorbed by the sediments with changes in general water quality, pH in particular. These elements are a serious source of pollution. The elements locked in the silicate lattices are not readily available in the biosphere (1-8).  
5.3 When comparing the trace element concentrations, it is important to consider the particle sizes to be analyzed (8, 9).  
5.3.1 The finer the particle the greater the surface area. Consequently, a potentially greater amount of a given trace element can be adsorbed on the surface of fine, particulate samples (4). For particle sizes smaller than 80 mesh, metal content is no longer dependent on surface area. Therefore, if this portion of the sediment is used, the analysis with respect to sample type (that is, sand, salt, or clay) is normalized. It has also been observed that the greatest contrast between anomalous and background samples is obtained when less than 80-mesh portion of the sediment is used (4, 5).  
5.3.2 After the samples have been dried, care must be taken not to grind the sample in such a way to alter the natural particle-size distribution (14.1). Fracturing a particle disrupts the silicate lattice and makes available those elements which otherwise are not easily digested (6). Normally, aggregates of dried, natural soils, sediments, and many clays dissociate once the reagents are added (14.3 and 1...
SCOPE
1.1 These practices describe the partial extraction of soils, bottom sediments, suspended sediments, and waterborne materials to determine the extractable concentrations of certain trace elements.  
1.1.1 Practice A is capable of extracting concentrations of aluminum, boron, barium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, molybdenum, nickel, potassium, sodium, strontium, vanadium, and zinc from the preceding materials. Other metals may be determined using this practice. This extraction is the more vigorous and more complicated of the two.  
1.1.2 Practice B is capable of extracting concentrations of aluminum, cadmium, chromium, cobalt, copper, iron, lead, manganese, nickel, and zinc from the preceding materials. Other metals may be determined using this practice. This extraction is less vigorous and less complicated than Practice A.  
1.2 These practices describe three means of preparing samples prior to digestion:  
1.2.1 Freeze-drying.  
1.2.2 Air-drying at room temperature.  
1.2.3 Accelerated air-drying, for example, 95 °C.  
1.3 The detection limit and linear concentration range of each procedure for each element is dependent on the atomic absorption spectrophotometric or other technique employed and may be found in the manual accompanying the instrument used. Also see various ASTM test methods for determining specific metals using atomic absorption spectrophotometric techniques.  
1.3.1 The sensitivity of the practice can be adjusted by varying the sample size (14.2) or the dilution of the sample (14.6), or both.  
1.4 Extractable trace element analysis provides more information than total metal analysis for the detection of pollutants, since absorption, complexation, and precipitation are the methods by which metals from polluted waters are retained in sediments.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are inc...

  • Standard
    4 pages
    English language
    sale 15% off
ASTM
ASTM C913-23(Specification)
Standard Specification for Precast Concrete Water and Wastewater Structures

SCOPE
1.1 This specification covers the recommended design requirements and manufacturing practices for monolithic or sectional precast concrete water and wastewater structures with the exception of concrete pipe, box culverts, utility structures, septic tanks, grease interceptor tanks, and items included under the scope of Specification C478/C478M.  
Note 1: Water and wastewater structures are defined as solar heating reservoirs, cisterns, holding tanks, leaching tanks, extended aeration tanks, wet wells, pumping stations, distribution boxes, oil-water separators, treatment plants, manure pits, catch basins, drop inlets, and similar structures.
Note 2: Installation and sealant requirements should receive special consideration due to special features of the application.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 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.  
1.4 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.

  • Technical specification
    6 pages
    English language
    sale 15% off
  • Technical specification
    6 pages
    English language
    sale 15% off
ASTM
ASTM C1227-23(Specification)
Standard Specification for Precast Concrete Septic Tanks

ABSTRACT
This specification covers monolithicor sectional precast concrete septic tanks. The following materials shall be used for manufacturing concrete septic tank: cement, aggregates, water, admixtures, steel reinforcement, concrete mixtures, forms, concrete placement, fibers, and sealants. The precast concrete sections shall be cured. Structural design of the septic tanks shall be by calculation or by performance. Concrete strength, reinforcing steel placement, and openings shall also be considered in the design. The physical design requirements include: capacity, shape, compartments, influent and effluent pipes, baffles and outlet devices, and openings in top slab. The following tests shall also be done: proof testing, leakage testing, vacuum testing, and water-pressure testing.
SCOPE
1.1 This specification covers design requirements, manufacturing practices, and performance requirements for monolithic or sectional precast concrete septic tanks.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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.  
1.4 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.

  • Technical specification
    6 pages
    English language
    sale 15% off
  • Technical specification
    6 pages
    English language
    sale 15% off
ASTM
ASTM D5761-23(Practice)
Standard Practice for Emulsification/Suspension of Multiphase Fluid Waste Materials

SIGNIFICANCE AND USE
5.1 This practice is intended as a solution to the difficulty of obtaining reproducible test results from heterogeneous samples.  
5.2 This practice works best with multilayered liquids, but can also be applied to samples with solid particles that are sufficiently small in size to be suspended in an emulsion.  
5.3 The emulsified/suspended sample can be used for all bulk property testing such as microwave digestion/inductively coupled argon plasma (ICAP), ion chromatography, heat of combustion, ash content, water, nonvolatile residue, and pH. It may be prudent to retain a portion of the sample in its original, multiphase form for some types of analyses.
SCOPE
1.1 This practice covers the generation of a uniform mixture or emulsion from multiphase samples which are primarily liquid in order to facilitate sample preparation, transfer, and analysis.  
1.2 This practice is designed to keep a multiphase fluid sample in an emulsified/suspended state long enough to take a single, composite sample that is representative of the sample as a whole. The sample may reform multiple layers after standing.  
1.3 The emulsion/suspension generated by following this practice can be used only for analytical procedures designed for the total sample and procedures not significantly affected by the emulsifier or the presence of an emulsion/suspension.  
1.4 This practice assumes that a representative sample of not more than 1 L has been obtained.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.

  • Standard
    4 pages
    English language
    sale 15% off
  • Standard
    4 pages
    English language
    sale 15% off