WPC  &;ͭ䢬%dLN`2DSr kh S<|HqExzac4QNO /kNOEٚwߓjW$! ioq_%b(n v]J.K *}qŀ^zaZ ;tLc9)m˺􀠊FFݚ7nBYuZGN sjwql$"~{UZG=u$ A^ {V;~DgmiY)}+`L!OqLMY}bF EбӦsYd.cˣ.L)K:@8gU#`-npXv9z7bgݝFrA9i`g\|PMY̫1\ԝp HʬyDbCU:P %nNM 0(Oww4{#^ P\ m^ 1u 72 1u. 72 0c 0O8 0O BE  <6X9`("Courier 10cpiX#|x<6X9`("Courier 10cpiXx6X@8;X@($,QP+el 1Acrobat PDFWriter0Hz., U(CEKQW]cioAutoList11)1)1)1)1)1)1)1) 1)3#37=CIQYag1.a.i.(1)(a)(i)1)a)i)(;3$2#  0  .3  0  ('2hP$ U!   ('2hP$ U!    d  hP)   _X?' xdE!?  Preparedby GeneRiley ,_EMC_     D     _EMC_Ԁ_TID_Ԅ019   _EMAD_,_OAQPS_,EPA  <   0  0D%%0D%D%0%%March05,1997%% ?' xdE!?  hP'   _X?' xdE!?   _EMC_Ԁ_TID_Ԅ019  _EMC_ԀTECHNICALINFORMATIONDOCUMENT L PAGE  1    ?' xdE!? !  _,X__  ?' $xdER$!? S @ EMISSIONMEASUREMENTCENTER v @ TECHNICALINFORMATIONDOCUMENT(_TID_Ԅ019)  W ?' ,$xdE7 $!? 8   @A A CLARIFICATIONOFMETHOD5,201A,AND6REQUIREMENTS  <    (CopyofLetterSent03/05/97)  N  sMr.CodyCress c  XApexInstruments D  P.O.Box727 %u  125QuantumStreet V HollySprings,NC27540 7 DearMr.Cress:    ThiscorrespondenceisinresponsetoyourlettertoMr. k Peter_Westlin_ԀdatedFebruary13,1997.Intheletteryou L requestedUSEPAapprovalwithdocumentationforthefollowing -} methodspecificationmodifications: ^  (83"3"    32  1  )3  0 4   ReduceMethod5typedrygasmetertemperaturesensorsfrom   twotoone.CurrentMethod5specificationsrequiretheuse  oftwotemperaturesensors(onelocated3݌4(#4(# Ќ  0  04(#(#attheinlettothedrygasmeterandonelocatedatthedry s gasmeteroutlet).T 4(#4(# 0  2)04(#(#ReducethediametersizeoftheMethod201Afilterholder !f" assemblyfrom63mmto47mm.Thecurrentspecifications !G# lista63mmfilterassemblywhichisavailablefromonlyone "($ specificvendor.# %4(#4(# 0  3)04(#(#Incorporatetheuseofanorificedevicetoindicateand {% ' measuresampleflowratewithintheMethod6samplingsystem. \&!( ThecurrentMethod6specifiestheuseofa_rotameter_,or ='") equivalenttomeasurethesampleflowrate.(n#*4(#4(#  DryGasMeterTemperatureSensors *&-  EPAhasconductedinhouseevaluationtestsusingthreesensors +&. (onesensorwasusedasacontrol)andfoundthattheoutlet ,'/ temperaturesensorprovidedthemostaccurate  d-(0 measurement.Therefore,itisacceptabletouseonlyone w temperaturesensorifthesensorispositionedeitherinthe X meter'splenumoratthegasmeteroutletconnection. 9  Method201AFilterHolderAssembly      EPAagreesthatthefiltersizespecification,63mm,andthe  e text,AndersenfilterpartnumberSE274describedinSection2.1.3  F ofMethod201AistospecificandintendstoamendedSection2.1.3  ' asfollows:    2.1.3FilterHolder. Afilterholderassemblyconstructedof A  stainlesssteelcapableofsupportingaglassfiberfilter,without "  organicbinder.Othermaterialsofconstruction(e.g.,glass,   Teflon)maybeused,subjecttoapprovaloftheAdministrator.The m  holderdesignshallprovideapositivesealagainstleakagefrom N  theoutsideoraroundthefilter.Theholdershallbeattachedas /  showninFigure1.Method201ASamplingTrain.   Method6FlowRateIndicator I    EPAapprovestheuseofanorificeassemblytoindicateand * measuretheflowrateoftheMethod6typesamplingtrain,provided   thattheassemblycanmeasuretheflowratetowithintwopercent u ofthedesiredflowrateofabout1000cc/min.Unlikethe V _rotameter_,whichdoesnotrequirecalibration,theorificeassembly 7 calibrationshouldbeverifiedalongwiththemeteringsystemas  describedinSection5.1.1InitialCalibrationandSection5.1.2 p PostTestCalibrationCheck. Q 0  EPAbelievesthattherevisedmethodspecification!! modificationsstatedabovedonotcompromisethetechnical } operatingandmaintenanceproceduresstatedinthespecific  ^ methods. !?   Ifyouhaveanyquestionsorifyouwouldliketodiscussthe x#! aboveresponses,pleasecallmeat(919)5415239. Y$"    4    <      D Sincerely, &$    4    <      D /signed/   L  'f!&    4    <      D ClydeE.Riley (G"'    4    <     EmissionMeasurementCenter )(#( cc:Mike_Ciolek_Ԁ(MD19) B,%+ Ѐ_Foston_ԀCurtis(MD19) #-&, ЀBill_Lamason_Ԁ(MD19) .'- ЀTomLogan(MD19) w Ѐ_Conniesue_ԀOldham(MD19) X ЀTomWard(MD19) 9 0  04G"G"0 4G"4G"