ASTM_F_1738_-_15.pdf

Designation:F173815Standard Test Method forDetermination of Deposition of Aerially Applied Oil SpillDispersants1This standard is issued under the fixed designation F1738;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.Scope1.1 This test method covers the measurement of the depo-sition of an aerially applied dispersant surrogate,typically dyedwater,on the surface of the ground or water.The test methodof obtaining these measurements is described,and the analysisof the results,in terms of dispersant use,is considered.Thereare a number of techniques that have been developed,and thistest method outlines their application.These measurements canbe used to confirm or verify the specifications of a givenequipment set,its proper functioning,and use.1.2 This test method is applicable to systems used withhelicopters or airplanes.1.3 This test method is one of four related to dispersantapplication systems.Guide F1413_F1413 covers design,Prac-tice F1460/F1460M covers calibration,Test Method F1738covers deposition,and Guide F1737/F1737M covers the use ofthe systems.Familiarity with all four standards is recom-mended.1.4 There are some exposure and occupational health con-cerns regarding the methods described.These are not discussedin this test method since they are a function of dispersantformulation.Anyone undertaking such experiments shouldconsult the occupational health experts of the dispersantmanufacturer regarding the precautions to be used.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E642 Practice for Determining Application Rates and Dis-tribution Patterns from Aerial Application EquipmentE1260 Test Method for Determining Liquid Drop SizeCharacteristics in a Spray Using Optical NonimagingLight-Scattering InstrumentsF1413_F1413 Guide for Oil Spill Dispersant ApplicationEquipment:Boom and Nozzle SystemsF1460/F1460M Practice for Calibrating Oil Spill DispersantApplication Equipment Boom and Nozzle SystemsF1737/F1737M Guide for Use of Oil Spill Dispersant Ap-plication Equipment During Spill Response:Boom andNozzle Systems2.2 ASAE/ASABE Standard:3ASAE/ASABE S561.1(R2013)Procedure for MeasuringDrift Deposits from Ground,Orchard,andAerial Sprayers-Standard by The American Society of Agricultural andBiological Engineers3.Significance and Use3.1 The deposition of an aerially applied dispersant isdefined as the amount of an aerially applied dispersant thatcontacts the surface;whereas,application dosage(frequentlyreferred to as application rate)is the amount of material that isreleased per unit area by the delivery system.The units ofdeposition are litres per hectare or U.S.gallons per acre.Thedeposition may differ from the application dosage(volume ofmaterial per unit area)for many reasons,such as,the effects ofwind on the spray and the evaporation of the dispersant after ithas been released from the aircraft.3.2 This test method describes the measurement of theability of a spray system to deposit a dispersant on oil.It is notintended that this test method be used at the time of a spill.These techniques are intended to determine the equipment1This test method is under the jurisdiction of ASTM Committee F20 onHazardous Substances and Oil Spill Response and is the direct responsibility ofSubcommittee F20.13 on Treatment.Current edition approved March 1,2015.Published April 2015.Originallyapproved in 1996.Last previous edition approved in 2010 as F1738 10.DOI:10.1520/F1738-15.2For 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.3Available from American Society of Agricultural and Biological Engineers(ASABE),2950 Niles Road,St.Joseph,MI 49085,http:/www.asabe.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 performance during the development of new systems and afterthe repair or significant modification of a system.3.3 The data obtained from the use of this test method canbe directly related to the deposition of dispersant on an oilslick,and thus can serve to determine both the dispersantdeposition and the droplet size.3.4 Surrogate deposition and droplet size data can be usedas a technical basis for the optimization of dispersant applica-tion equipme