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HANDLINGREQUESTSFORAPPROVALOFMINOR/MAJORMODIFICATIONS/ALTERNATIVES  TOTESTINGANDMONITORINGMETHODSORPROCEDURES       INTRODUCTION   f  Thepurposesofthisinterimguidelineare(1)todiscusstheEnvironmental    ProtectionAgency(EPA)alternativetestmethodandmonitoring    approval/disapprovalproceduresunder40CFRParts60,61,and63and(2) |  describeEPAproceduresforrequestingandrespondingtorequestsfor R  approvalofalternativetestmethodsandmonitoringprocedures.The (x  proceduresdescribebothexternalandinternalproceduresand N  responsibilitiesassociatedwithEPA'stechnicalassistanceandreview $  authorityroles.Amoreextensiveversionofthisguidelineisunder   development.   BACKGROUND  ,| TheGeneralProvisionsto40CFRParts60,61and63(NSPSandNESHAP)give 6 theAdministratoroftheEPAtheauthoritytoapprovechangestotesting   andmonitoringrequirementsspecifiedbytheSubpartsofParts60,61,and  63fordeterminingorassessingcomplianceofstationarysourceswith h Federallyenforceableemissionlimitationsorstandards.Manyofthe > Subpartsreiteratethisauthority. d Delegations7119and7121ofEPAsDelegationsManualformallyclarify  thattheauthorityforapprovalof(1)minorchangestotestmethods  procedures,(2)shortersamplingtimes/smallersamplingvolumes,(3) l  waiversofemissionsandperformancetestrequirements,and(4)allchanges B! tomonitoringrequirementscanbedelegatedtotheRegionalAdministrators  h" oradesignee.Authorityforapprovalofalternativemethodsorequivalent  ># methodscanbedelegated only totheDirectoroftheOfficeofAirQuality !$ PlanningandStandards(OAQPS). "% Inmanycases,theRegionalAdministratorshavedelegatedtheauthorityto T$' approveminorchangestotestmethodsandmonitoringprocedurestothe *%z ( StateorlocalagenciesresponsibleforimplementingtheNSPSandNESHAP. &P!) TheDirectorofOAQPShasfurtherdelegatedresponsibilityforthe &&"* authorityforapprovalofmajorchangestotestmethodstotheDirectorof '"+ theEmissions,MonitoringandAnalysisDivision(EMAD)who,inturnhas (#, delegatedittotheLeaderoftheSourceMeasurementTechnologyGroup. X)$- Asfurtherclarification,ourunderstandingisthatthisdelegationshould +T&/ notbeappliedtoprogramsoperatedundertheAirQualityStrategies +*'0 Division(AQSSD)Director'sdiscretion(i.e.,thosecompletelydelegated ,(1 toStateorlocalagencieswithlittleornoEPAoversight)nortoinitial -(2 StateImplementationPlanreviews.Fortheseprograms,theagencywill \.)3 providespecificguidanceonwhatconstitutesacceptabletestmethods 2/*4 throughtheregulationorassociatedguidancematerial(e.g.,theTitleIV 0X+5 backgrounddocumentation). 0.,6        р ACCEPTANCECRITERIA  P   Arequestforamajorchangetoatestmethodormonitoringrequirementand   testingwaiverswillreceiverigorousreview.Basicprinciplesofthese  f reviewswillbe:  < 0   %% 0  (a)Thechangeinthetestingormonitoringmethodorprocedurewill b  provideadeterminationofcompliancestatusatthesameorhigher 8  stringencyasthemethodorprocedurespecifiedintheapplicable   regulation;orj %% Ѐ @  0  (b)Thecomplianceorconformancewithanapplicableemission   limitationorstandardhasbeensufficientlydemonstratedbyother f  meanstojustifythetestingwaiver.< %% Inaddition,therequestershallincludethecompellingreasonswhich n  promptedtherequest;thatis,arequestforanychangeshouldaddress D significantdeficienciesinapplyingtheprescribedprocedureorprovide  meaningfulimprovementsachievedoverexistingproceduresormethods. j Examplesofsupportingreasonsareasfollows: @ 0  (a)Overcomingsignificantinterferencesorbiases(e.g.,addition r ofanHClfilledimpingertoremoveNH3fromanSO2gassample);H%% 0  (b)Allowingfornewtechnologyforimprovedaccuracy,lowercost n procedures,orincreasedapplicability(e.g.,useofdynamic D calibrationgascellsforinsitucrossstackcontinuousemission  monitoringsystemsinlieuofarelativeaccuracyaudit);v%% 0  (c)Allowingalternativemeasurementlocationsforhybridprocesses " subjecttomultipleregulations(e.g.,alternativemeasurementsand r  emissioncalculationproceduresforcombinedcycle,gasturbine/fossil H!  fuelfiredboilerunits)."!%%  Mostimportantly,acceptanceofanalternativetestmethodshallbebased #P# onsubstantivetechnicalsupportinformation. Whilechemistry, $4$ engineering,andeconomicevaluationswillbeimportanttotheEMAD %% reviews,requestsmustalsoincludesupportdataofthetypedescribedin h&& Method301ofAppendixA,Title40Part63.ThepromulgationofMethod301 >' ' includedtherequirementthatanynonvalidatedmethodproposedfor (!( demonstratingconformancewithafederalemissionlimitationorstandard (p") besubjecttotherequirementsinMethod301.Supportinginformation )F#* includes: *$+   (a)0 4 directcomparisonswithexistingreferenceorcompliancetest B,%- methods;-&.4%4% 0  (b)04%%precisionandbiasdeterminations(e.g.,duplicatetest_trains .J(0 andmultipletestrunsunderarangeoftestconditions);andz4%4% 0  (c)04%%detailedanddocumentedtestprocedures(e.g.,similarto & publishedEPAreferencemethods).4%4%  CONTENTOFREQUEST   . Requestsmustbemadeandapprovalsgrantedonafacilityspecificbasis. b  Acompleteletterofrequestshouldinclude: 8   + #$%&'()*(y3!" 3"   323  0    Name(s)andlocation(s)offacilitiestowhichrequestedtesting j  alternativeistoapply. 3 ݌@ %% Ќ   + #$%&'()*(yy+ #$%&'()*" 3"   3z!23  0    Federaltestingrequirement(e.g.,subpartandparagraphof40_CFR_ f  part60,61,or63)towhichfacilityissubject. 3z!!݌< %% Ќ  " 3"   3"23  0    Detaileddescriptionofalternativetestingprocedure(s). 3"#݌n %% Ќ  " 3"   3#23  0    Justificationforalternativetestingprocedure(seediscussionin  sectiononAcceptanceCriteriaabove)includinganysupportingtest j data. 3##݌@%% Ќ  " 3"   34%23  0    Namesofresponsiblestate/localagencyandEPARegionalcontacts,if r possible. 34%a%݌H%% Ќ  QuestionsregardingtheseproceduresshouldbedirectedtoRobin_Segall_ n (919/5410893;segall.robin@epa.gov). D Sendcompleterequestsforreviewofalternativetestmethodsto: v Dr.ConnieB.Oldham,Leader " _Emission_ԀMeasurementCenter r  U.S.EPA(MailCodeE14302) H!  ResearchTrianglePark,NC27711 "! CopiesoftherequestshouldbesenttotheresponsibleEPARegionalOffice #P# andstate/localagency.XXXXO $&$