ASTM_D_8107_-_18.pdf

Designation:D810718Standard Practice forDetermining Sediment Pond Skimmer Flow Rate1This standard is issued under the fixed designation D8107;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers the setting up and running of a testto determine the clear water flow rate at various depths of afloating sediment pond skimmer.1.2 This practice is limited to large-scale test conditions,and does not address hydraulic modeling or pipe-flow basedcalculations.1.3 The values stated in SI units are to be regarded as thestandard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 DefinitionsFor definitions of other terms used in thispractice,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 floating sediment pond skimmer,na buoyant devicethat releases/drains water from the surface of sediment ponds,traps or basins at a controlled rate of flow.4.Summary of Practice4.1 This practice is for evaluating the clear water flow rateof a floating sediment pond skimmer versus pond depth,including details for setting up a performance test that can beused for design characterization as well as quality assurance todetermine product conformance to project specifications.5.Significance and Use5.1 This practice covers the guidelines,requirements andprocedures for evaluating the flow rate of a floating sedimentpond skimmer versus pond depth.This practice refers tolarge-scale testing procedures,and is patterned after conditionstypically found on construction sites within a sediment basin.This practice outlines test preparation,test execution,datacollection,data analysis and reporting procedures for any sizecalibrated basin.6.Apparatus6.1 Apparatus/Facility:6.1.1 Testing is performed in a calibrated basin(that is,ithas a known surface area at any known depth)of sufficient sizeto facilitate multiple,accurate depth readings under the ex-pected flow rates,but not less than 0.9 m deep 1.2 m wide 6.1 m long.A typical basin is shown in Fig.16.1.2 The basin shall be outfitted with a skimmer dischargepipe having a diameter no smaller than that of the pipe joiningit to the floating skimmer head.The discharge pipe shall havea valve or stopper that can be controlled or removed/replacedfrom the outside of the basin to initiate and stop flow throughthe skimmer.It is also recommended to also have a valveddrainage pipe to enable lowering of the water surface withinthe basin if desired to take flow rate measurements at variousdepths without waiting for discharge exclusively through theskimmer.6.1.3 A water supply connected to the basin either via agravity flow system or a pump and associated piping is needed1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25 on Erosion andSediment Control Technology.Current edition approved Jan.1,2018.Published February 2018.Originallyapproved in 2017.Last previous edition approved in 2017 as D2517 17.DOI:10.1520/D8107-182For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technic