WPCY  䇍x{.{3b͂궁vi.7EExDa6\GbMiwjCs(}"zD!(+i[rF/挨fXC=~%W fFy$Xr 4ܬ-Nʅ \< 8zo~߬,B_C. ^`N$,{7(v&LsR;؆] yaXB~Y]Y>Dnigx] EG+D N'݊DIH%4@ x څ]B%T06؊?ZQ6d6{;DHV;/Ayd%sZyhrY{2l|-y`* ޤe$>k FdhVM]1џLLh{Topơ0)˔#!UN %3 0(9^ awm4q m\UN NWHP LASERJET IIISI,,,,,,0(9 Z6Times New Roman RegularX($x&c*?&3|xU ThroweNhien PhamNidhiOMeara(9 Z 6Times New Roman Regular !  _ MEMORANDUM   8  SUBJECT:0 ` NationalEmissionStandardsforHazardousAirPollutants:_Halogenated_ԀSolvent   Cleaning ` (#` (# FROM:0 ` ScottThrowe,BranchChief ` (#` (# 0  0` (#(#ChemicalIndustryBranch ` (#` (# TO:0  0` (#(#NhienPhamH` (#` (# 0  0` (#(#Nidhi_OMeara_ ` (#` (#   WewelcometheopportunitytoassistyouinmonitoringcompliancewithSubpartT,thenationalemissionstandardsfor_halogenated_Ԁsolventcleaning.Asdiscussedinarecentconversationwithmystaff,guidanceisneededtoevaluatecompliancewiththeequipmentstandardsforbatchcoldcleaningmachines.Specifically,yourequestedguidanceondeterminingcompliancewith63.462(a)(1).  Owneroroperatorsofanimmersionbatchcoldsolventcleaningmachinecomplyingwith63.462(a)(1)mustemployatightlyfittingcoverthatshallbeclosedatalltimesexpectduringpartsentryandremovalandawaterlayerataminimumthicknessof2.5centimeters(1.0inch)onthesurfaceofthesolventwithinthecleaningmachine.Todeterminethethicknessofthewaterlayeronthesurfaceofthesolvent,aclearpipettemaybeimmersedandextendedbeyondthesolventwaterinterface.Oncethepipettehasbeenimmersed,plugtheendofthepipettetopreventanyairfromenteringthetopofthepipetteandremovethepipettefromthemachine.Avisualinspectionofthecontentsinsidethepipettewillenableyoutodeterminethewaterlayerthickness.   XXXXԀPleasecontactTracyBackat(202)5647076withanyfurtherquestionsregarding (#' Subpart_T.#XXX X>#_ )$(