Aerospsce NESHAP Exemptions

Exemption from All Requirements

Specialtv Coatings, Low Volume Exemption: Combined total of

200 gallons of low volume specialty coating exempt use in

addition to 200 gallons for primers/topcoats/chemical milling

maskants. (Proposed Section æ.7 a\g))

Specialtv Coatines, HAP-Free Specialtv Coatings: Exempt

specíalty coatings that do not contain HAP (less than L.O/O.I%

HAP). (Proposed Section 63.7 41,(f)l

Exemption from lnorganic Limit

Coating Operation: Define spray-applied coating operation to

exclude where no atomization. Exempt non spray-applied coating

operations. (Proposed Section 63.742)

Specialtv Coatings lnorganic Standard-Specific Exemptions:

Exempt the following: 1) spray application impractical to perform

in booth (effective immediately upon approval from local

permitting authority, included in part 7O/71, permit at next

renewal or significant modification), 2) spray application

controlled by equipment or work practices, 3) spray application

from hand-held device with capacity less than 3.0 fl oz. (proposed

section $.7 asþ)Ø)(ix) through (xii))

Exemption from Organic Limit

Recoating of Assembled Aircraft: Organic HAp should not apply to

coating or recoating operations if original coating formulation

required for governmental approval is used. (Proposed Section

63.741(k))

Exemption from Application Equipment Requirement or Equivalencv

¡ Exempt Non-Sprav Application Methods: Allow the following

non-spray application methods, which achieve the same or

greater reductions as HVLP: web coating, coil coating, touch-up

markers, marking pens, trowels, spatulas, daubers, rags, sponges,

and mechanically and/or pneumatic-driven syringes.

Clarify that the application provisions are not applicable to

operations applying the following types of specialty coatings

because they are not atomized even when applied with spray

equipment: adhesives, sealants, maskants, caulking materials,

and inks. (Proposed Section 63.74s(f)(1); 63.7as(f)(3)(vii))

o Exemptions for High Viscositv CoatinRs and Air Brushes:

Application equipment provisions should not apply to 1) specialty

coatings with less than 20 grams of VOC per liter, 2) Specialty

coatings with a viscosity of 200 cent¡poise or greater, and 3)

application of specialty coating with a detailing un or airbrush. tt

is operationally impractical to apply low VOC and high viscosity

coatings with HVLP. (Proposed Section 63.745(fX3) (viii) through

(x))

Specialtv Coatings Application Equipment-Other Application

Methods: Explicitly allow for the following application

equipment: L) air assisted airless and airless spray guns, 2)

screen printing, and 3) inkjet printing. Air assisted and airless

have been demonstrated as equivalent to HVLp. (proposed

Section 63.74s(f)(1)(ix) and (x))

Specialtv Coatings Application Equipment-Equivalencv

Demonstrations: Allow use of method of choice to demonstrate

eq uivalency to HVLP. ( Proposed Section 63.745(f)(1)(xiii)
N E S H A P Exemptio ns- Pr opos ed L anguøg e

$63.741 Applicability and designation of affected sources.

(a)'1'his subpatt appJics to facilitics thât arc cogagcd, either in part or in wholc, in rhe manufacturc or

rcwork of commercial, civil, or milital' aerospacc vehicles or componcnts and that arc major sourccs as

defincd in $63 2.

þ) The owocr or opcrator of an affcctcd source shall comply u,ith thc rcc¡uircments of this subpart and of

subpart,\ ofthis par¡ cxccpt as specified in $63 743 (a) and'l'able 1 ofthis subpart.

(c) '\ffcctcd sou¡ces. l'he affcctcd sources to which thc provisions of this subpart appl)' are specifìcd ìn

paragnaphs (c)(1) through G8) of this scction. 'fhe âcti\-itics subjcct to this subpart arc limitcd to tl.rc

r¡anufacturc <>r rcw<¡rk ofacrospace vehiclcs or componcnts as dcfined in this subpart. \Vhere a disputc arises

relating to thc applicability of this subpart to a spccific actii,it¡', thc ou/ncr or opcrator shall demonstratc

whethcr or not thc actii'ity is regulatcd under this subpart

(1) ìjach clcaning operation as follows:

(i) ,,\ll hand-wipe cleaning opcrations constitutc an affected sourcc.

(ii) Each sprây gun clcaning operation corstitutes an affcctcrl source.

(üì) ,\ll flush cleaning opcrations constitutc an affcced sc¡urcc.

(2) Jror organic ll,\P or YOC emissions, cach primer application operation,

primer applications ât thc facility.

(3) Iìor organic IJI\P or \/OC ernissions, cach topcoat application operation,

which is the total of all

which is the totaÌ of all

topcoat applications at the facilig'.

(4$ Irot organic I I.\P or YO(. emissions, cach depaintiag operation, which is the total of all dcpainting

at thc faciliq'.

(5!) Flach chemical millirg masì<ant application operation, whrch is the total of all chemical milling

maskant applications at thc faciliq.

(61) ilach waste storâgc and handlìng operation, which is the total of all waste handLing ancJ storage at thc

faciliq'.

spccialty coating application opcratiori subjcct to 5-63 745 or a dcpainting operation subjcct to $

63.146þ)(4)

(d) ,'\n owncr or opcrator of an affected sourcc subject to this subpârt shall <¡btain an operating pcrmit from

thc pcrmitting authoriq,in the Statc in which the sourcc is located. l-hc owner or operâror shall apply for and

obtain such permit in accordancc with the regulations contained in part 70 of this chapter and in applicablc

Statc rcgulations.

(c) Àll wastcs that are detennined to bc htzardots wastcs under the llcsourcc Consen'ation and lì.ecovery

Act of 1916 OL94-580) (llclìA) as implementccl by 40 CIìR parts 260 md 261,, and thar are subject to lìClì¡\

rcquirements as implcmcntcd 40 CIFR 262 throuLgh 268

âre excmpt from the requircmcnts of this

subpart

(f'lhis subpar

@docsnOtfegulaterescarchandder.elopmcnt,quality

control, and laboratory testing activities, chemical milling, metal finishing, clectrodeposition (cxcept for

clcctrodeposition of paints), compositcs processing (cxccpt for clcaning and coating of composite parts or

compoflcnts that become part of an acrospâce r.ehiclc <¡r component as wcll as composite tooling that comcs

in contact with such composite parts or componcnts prior to curc), electronic parts and assembJics (cxcept
for clcanittg and topcoating of complctccì asscrnblics), manufacture of ai¡craft transparcncics, and wastcwater

oPeratìoûs at acrosPace facilitics. 'flrcsc tcquircrncnts do not applv to the rcwork of aircraft <n airctaff

colrìPoncnts if thc holdcr of thc Fcdcral ,\r'iatiol .,\dministration (F.\À) dcsþ approval, or thc holdcr's

Ìiccnsce, is lot activcll' manufacturing the ai¡craft or aircraft componclrts 'l'hese rcc¡uirements also do not

aPPl)' to parts ancJ asscmblics not critical to thc vchicle's structurâì intcgriq' or flight pcrfonnancc 'fhc

rcquircmcnts of this subpart als<¡ d<¡ not appll to prirners, topcoats__speialE e<xLtings, chcrnical rnilling

maskailts, striPPcrs, and cleanilg soh'cnts containing IIAP ancl \¡OC at conccntrations ìcss than 0.1 perccnt

b]'mass for catcinogens or 1.0 pcrccnt bv mass for loncarcinogcns, as dctclnincd from manufacturer's rcpres(lrtati()ns¡_S!gh_4!-i4_4 'l'o thc cxtent thrt an

. .'\ddi1!oq4l spccific cxcmptions from fggglargql

co\¡cragc âfe sct fofth in parag'raphs ("), (Ð, 0.), (r) and 0 of this sectìon and $\_63.742, ß.7aa@)(), þ), (c),

63.7 4s (a), (Ð (:), (g) (+), 63.1 46 (a), þ) (s), 03.7 a7 (c) (3), aú û.t ae @)

(g) 'l'hc rc<luircmcnts for prirncrs, topcoats,

$63-747 do ncx applv to thc usc of low-volunc coatinpp in thcsc catcgodes for rvhich thc a¡nual iotal ofcach

scfarâtc fcrrmulation uscd at a facilitv docs not cxcccd 189 I (50 g"al), and thc cornbirrcd annual total of¡ll sucl.r

prirncrs, toPcoats! nd chcrnical milling rnaskalts u¡-ed at a facilin' does rrot cxcccd 757 I

(200 gal).

T5lliter+{20ègaù--Prirn ropcoâts,af,d-Spççialsso:ltliqgÞ-cxcmprcùundtrprra-g,r-apF(f)-oFnliis sEfüorj

ald rmder $-63.745(Ð(3) and fu)(a) arc not includcd in thc 50 and 200 gal lirnits. Chcrnical rnilling maska¡ts

cxcmptcd undcr \_63.747(c)(3) are also not includcd in thcsc limits.

ft) Rcgulatcd activitìcs associatcd with spacc vehiclcs desþcd to trâ\,cl beyoncJ the limit of the carth's

atmosPhcre, including but not lirnitcd to satclÌitcs, spâcc stations, anil the Spacc Shuttlc S),stern (incìuding

orbitcr, extcmal tanks, and solid rockct boostcrs), arc excmpt from thc rcquircmcnts of this subpart, cxcepì

for depainting operatìofls found in $63.746

(i) ,\ny watcrbomc coating fot u'hich thc manufacturcr's suppliccì <lata tlcmonstratc that orgaflic JJÀP and \'()(l contcnts arc lcss thrn or cqual to thc orgânic I TAP and YOC contcnt limits for its coating q,pc, as

spccìficd in \$63 745(c) and 63.747(c), ìs cxcrnpt from the folkrwing rcguitcments of tl.ris subparr 5$63 745(d)

at'td (e), 63.7 41 (d) and (c), 63.7 49 (d) and (h), 63.750 (c) through ft) and ft) ttrrough (n), 63.152 (c) and (fl, and

63'153 (c) and (e). .-\ facility shalÌ maintai¡ thc manufacturcr's supplicd data and annuaì purchasc rccords for

cach exempt waterb<trnc coating rcadily availablc for ilspcction ald rcview and shall rctain thesc data for 5

ycafs.

0 lìcgulatcd activities associated witb the rework of antiguc aerospacc vchrclcs or components arc cxer¡pt

S 63.742 Definitions.

'I'erms used in this subpart are dcfincd il thc ,,\cq in subpart A of thìs part, or in this scction as

follows:

2lPage

Comment [AlJ: This proposed language

addresses the applicabilitv ofthe rule to specialtv

coatings that do not contain HAP. The proposed

language w¡ll encourage the use of no-HAp coat¡ngs

by allowing owner/operators to include them ¡n

averagrng

Comment [A2l: This proposed language

addresses the request for an addìt¡onal exempt

volume of coatings spec¡fic to specialty coat¡ngs

Comment [A3]: The purpose ofth¡s proposed

language ¡s to allow the or¡ginal coat¡ng formulat¡on

to be used where required for conformance with

FAA and other governmental requ¡rements

Comment [44]: lhe purpose of this proposed

languðge ¡s to clarify what ¡s a nd whãt is not

considered a spray applied coat¡ng operêt¡on.
mach;cs.

5-63.745 Standards:

Prime topcoat g4djg!4!@,Adgglapplicationoperarions.

(e) lirch r)wn(r'r)r'opcrrtor of a ncw or cxisting prìnre to¡coat. or spccialtv coating applicrtion o¡crrtìtrr

subiect to this subpart shall cornpll with thc rccluircmcnts spccificd in para¡¡raph (c) of this section for those

coatings that arc uncontrollcd (no coltroì dcvice is uscd to rcducc organic I L,\Ì) crnissions from thc

oPcration), and in paragraph (d) ofthis scction for thosc coatilgs that arc controllcd (rrganic I L\l) crnissions

frorn thc opcration are reduccd bt' thc usc of a control dcvicc) ,\crospace cc.¡uiprncnt that is no ktngcr

opcrationaì, intcndcd for pubÌic displav, an<J not casi\' capablc of bcing moved is cxcrnpt from rhc

rcc¡uircmclts of this scction.

þ) Dach owner or opcrator shall co:rcluct the handlin¡¡ ald transfcr of primers tr¡lcoats,jqd_..!ìpççi4lE

coatings to or frorn containcrs, tanl(s, \/ats, r'cssels, and pìpìng systcms in such a malncr that rmnirnizes spills.

(c) Unct,ntrollcd coaturJrs or$anic I l.\l) end \'( X. cr¡rtçnt lcvt'ls l.lach ¡rwrrcr ()r opcrât(rr sìralì compl¡.uitìr

thc organic I L\P and \'OC contelrt limits spccifìcd in parag'raphs (c)(1) through (c)(4!) of this scction for

thosc coatings that arc uûcontrollcd

(1) Organic I I \l) cmission"^ from prirncrs shall bc limitêd to an organic [r\Ì) content lcvcl <¡f no more

than: 540 g,/1. (45Ib/gal) of primer (less watcr), as âpplied, for gcncral ar'ìation rework facilitics; or 650

g,/1, (5 4lb/gal) of cxtcrior primcr Qess watcr), as applicd, to largc comrncrciitl rictaft componcnts

þarts or asscmblics) or fullv assemblcd, largc commcrcial akctaft at cxistìng affected sourccs tbat

lrroducc ful\, a".cmblccl, Jargc comtnercial aircraft; or 350 g/1, Q.9 lb,/gal) of primer (css watcr), as

applicd.

(2) \'OC cmissious frorn prirncrs shall bc lirnitcd to a \¡(Xl contcnt lc\.cl of no morc tha¡:

540 g/1, (a.5 lb/gal) of prirrrcr (css water and cxcrnpt sr¡h'cnts), as applicd, for gcneral ar.iatiol rcworì<

facilitics; ot 650 g/), (5 a lb/gal) of extedor primcr (css water and exempt solvcr.rts), as applied, to largc

commcrciaÌ air-craft cornponcnts þarts or assemblics) or fuì11' 255smblerJ, largc cormnercial ¡itcrtíÍ tt

existing affccted sourccs that producc ful\' asscmblcd, largc commcrcial aitctafT; or

350 g/L Q9lb/gù) of pnmer Qcss watcr and cxcrnpt solvcnts), as applìcd

(3) Organic ll\P cmissions flom topcoats shall bc limitcd to a¡ organic Il,'\P contcnt leyel of no morc

than: 420 g/L Q.5lblgal) of coatirg Qcss water) as applicd ot 540 g/L (a.5 lblgal) of coating (less watcr)

as appLied for gcncraÌ ar.iation rcwork facilitics. Organic ll,\P cmissrons from sclf primilg topcoats shall

be limitcd to au organic I l,\Ì) contcnt lcvcl of no more than: 420 g,/L (3.5 lb/gal) of sclf-priming topcoat

Qess watcr) as applied or 540 g/), (4.5 ll':'/gal) of sclf-priming topcoat (less watcr) as applicd for general

aviati<¡n rcwork facilitics.

(4) \/OC emissions fiorn topc()ats sball bc lirnitcd to a \'()(l contcnt lcvcl of no morc than:

420 g/1. (3.5 lb/gal) of coating (lcss watcr and cxcmpt soh'cnts) as applied or 540 g/1, (4.5 lb/gal) of

coating (lcss wâtcr and cxcmpt sohrcnt$ as applicd for gcncral aviation rework f¿cilitics. \/()(l emissions

frr¡m sclf- priming topcoats shall bc limìted to a \IOC contc¡t lcvcl of no morc than: 420 g/L (3.5 lb/gal)

of self-prirning topc()at (lcss watcr and cxempt soh.ents) as applicd <':r 540 g/), Ø 5 II:/grl) of self-priming

topcoat (lcss watcr) as appliccl for gcncral aviation rcworÌ< facilitics

coatrnû tvoe.

3lPage
able 1. Specia.lty Coatings -- FIAP and \¡O(l Content Limits

Coating Type

H,AP Limit

uL(tb/ganoù7

VOC Limit

glL (tb/ gatton¡I

Ablative Coatins 600 (s.0) 600 15.0)

Adhesion Promoter 890 0.4\ 8e0 (7.4)

Adhesive Bondinp Primcrs: Cured

ú250oF or below

8s0 (7.1) 8s0 (7.1)

Adhcsivc Bondins l)rimers: Curctl

above 25OoF

1030 (8.6) 1030 18.6)

Commercial Interio¡ Adhesivc 760 (6.3) 160 (6.3)

Cyanoacrylate Adhesive 1,020 (8.5) 1,020 (8.s)

Fuel Tank Adhcsive 620 (s.2) 620 (s.2)

Nonstructural Adhesivc 360 (3.0) 360 r3.0)

Rocket lVlotor Bonding Adhesle 8e0 (1.4) 8e0 (7.4)

Rubber-based Âdhesive 8s0 (7.1) 8so 0.1)

Structural Autoclavable Adhesive 60 10.5) 60 (0.5)

850 17.1) 8s0 (7.1)

Antichafe Coating 660 (s.s) 660 (s.5)

Bearing Coating 620 (s.2) 620 (5.2)

Caulkins and Smoothinø (iomoomds 850 t7.1) 850 17.11

550 14.6) 550 (4.6)

Clear Coating 120 (6.0) 120 (6.0)

650 (,5.4) 650 15.4)

Comoatible Sub strate Primcr 780 (6 s) 780 (6.s)

Corrosion Prevention Compound 710 (s.9) 110 (s.9)

Cryoqcnic Flexible Primcr 645 (5 4\ 645 (5.4\

Cryoprotective Coating 600 (s.0) 600 (s.0)

Dry l-ubricative Mate¡ial 880 (7.3) 880 0.3)

800 /6.7) 800 (6.7)

Electrostatic

Interfcrence

Discharge and Electromagnetic

Ì,MI) Coating

800 (6.7) 800 16.7r

Elevated-Tet

Commc¡cial .

Ècrature Skydrol- Resistant

ímef

740 (6.2) 140 (6.2\

Epoxy Polya idc'l'or;coat 660 (5.s) 660 (s.s)

Fire-lìesistar linterior) Coatins 800 16.7) 800 l(r.7)

Flexible Priml Í 640 (5.3) 640 (5.3)

Flight-Test Coatings: N{issile or Single Usc

Aircraft

420 (3.5\ 420 (3.5\

Flisht-Test Coatines: All Other 840 (7.0) 840 (7.0)

4lPage
Fuel-Tank Coating 720 (6.0) 720 (6.0)

High-Temperature Coating 8s0 (7 1) 8s0 0.1)

Insulation Covcring 140 (6.2\ 140 (6.2\

Intc¡mediate Releasc Coating 750 (6.3) 7s0 (6.3)

Lacquer 830 (6.e) 830 (6.9)

Bonding Nlaskant 1,230 (10.3) 1,230 (10.3)

Critical Use a¡d l-ine Sealer Maskant 1.020 18.5) 1,020 (8.5)

Sea-l (loat I\faskant 1,230 (10.3) '1,230 (1,0.3)

Metallizcd Epoxy Coating 740 (6.2) 140 (6.2)

Mold Release 780 16.5) 780 16.5)

Optica.l Anti-lì.cflective Coating ts0 (6.3) 7s0 (6.3)

Part Marking Coating 8s0 (7.1) 8s0 (7.1)

Pretreatment Coating 780 (6.s) 780 (6.s)

Rain Erosion-Rcsistant (ìoatinq 8s0 (7.1 8s0 (7.1)

lìocket Motor Nozzle Coating 660 (s.5) 660 15.5)

Sczle Inhibitor 880 (7.3) 880 O.3)

Screen Print Ink 840 0.0) 840 (7.0)

280 e3\ 280 (2.3\

Sprayable Sealant 600 (s.0) 600 (s.0)

Silicone insulation Material 850 (7.1 8s0 (7 1)

Solid Film l-ubricant 880 (7.3) 880 a/.3)

Spccialized Function Coatinq geo (t.4) 8e0 o.4)

Temporary Protective Coating 320 Q.7\ 320 Q.7)

Thermal Control Coatine 800 (6.7) 800 (6.7)

675 (5.6\ 675 (5.6\

Wins Coatino 850 í.1) 850 í.1)

qa-llons) of coatinø less

coatins less watcr and lcss cxcmot

solvent.

(tJ) (iontrollcd coalirlgs-control s)'stcm rctluiremcnts liach control s¡srcm shall redrrcc thc

opcration's organic IìÂP and \¡()C cmissions to thc atmosphcrc by 8170 or g'reâtcr, tal<ing into

account capture and dcstruction or rcmoval efficicncies, as dctermined using the proccdurcs in

$63.750(9) when a carbon adsorbcr is uscd and in \63.750Qi) when a control device othcr than a

carbon adsorber is uscd

(c) Compliancc mcthods. Compliancc with thc organic FLÀP and \'OC cofltent limits specifred in

paragaphs (c)(1) through (c)(4!) of this section shall be accomplished by using the mcthods

specificcJ in parag'raphs (c)(1) and (e)(2) of this section either by themseh.cs or in conjunction

with one aûother.

(l) Usc primcrs tolìcoals (including sclf-¡riming ropcoats). a¡d specialty coatings wirh

HAP and \/O(l content lcvels equal to or less than the limits specifred in paragraphs (c)(1)

through of this scction; or

(2) Use tbe avcraging provisions clcscribed in $ó3.743(d)

5lPage
(0 .\nnìication cquiDmt'¡t l'lxccnt as nrovidtd in oarlmloh (fl(3) of this scctiorr. cach owncr or

opcrator of a ncw or cxistìilg prirrìe topcoat (iflcluding sclf-priming topcoât),_of

specìalty coating application opcration subjcct to this subpart in which any of thc coarings contain organic

Il-'\P or YOC shall comp\'with thc requir-emcnts specified in paragraphs (!(1) ancl (f)(2) of this scction.

(1) !\ì) primcrs lgpçgltq (ilcluding,sçlf pri-jrg !1,I,.94!! shall be appticcl

usin¡¡ onc or morc ofthc application tcchniqucs spccificd in paragraphs (f(1)$ through xüi) of

this scction

(i) Flow/curtain coat application;

(ü) Dip coat ap¡lication;

(iii) Roll coating;

(ir) Brush coating;

(i') (ìotton-tippcd swal¡ application;

(r.i) l.ìlcctrodcposition (dip) coating;

(i'ü) I ligh \olume lou¡ prcssurc (IJYLP) sprayrng;

(r.üì) ì,)lcctrostatic spral' application; or

(ix xi) Other coatilìg applicâtion rncthods that achicvc cmissio¡ rc<luctir¡¡s cquiyalcnt to IIlLp

or clcctrostatic spray application methods, as detcrmincd accordhg to thc rcguilemcnts in

\63.750(Ð.

(xü) For spccialty coatings: wcb coating coil coating, touch-up markcrs, marking pcns, trowcls,

sPattÌlîs, danbers, rags, spongcs, and mcchanically atd/or pncumatic-driven syringcs, or othc¡ nonspray application mcthods.

transfcr cfficicncv achicvcd.

(2) r\ll applicatir¡n dcvices used to appl)' primers topcoats (including self-priming topcoats)+__e!

specia-ltv coatings shall bc opcratcd according to corìpân)' proccdures, krcal spccified opcrating

proccdurcs, and/or the manufacrurcr's spccifìcations, whichcvcr is mosr stdngcfl! ât

timcs. [,quipmcnt modified by thc faciliq' shaìl maintain a transfer cfficìcncy equir.alcnt to ITYLP and

electrostatic spray application tcchnic¡ues.

(3) The folìowing situations are cxcmpt frorn thc rcqnircmcnts of paragraph (f (1) of this scction:

(i) Any situation that normally rcquires the usc of an ai¡b¡ush or an cxtension on

thc spray gun to propcrly reach limitcd acccss spâces;

(ü) The application of coatings that co¡tain frllers that advcrsely tflect atomjzatton wirh llll-p spray

guns and that thc permittingagcncv has dctermincd cannot l¡c applicd by any of thc application mcthods

spccificiì in patag'raph (f)(1) ofthis scction;

(iìi)'l'hc application of coatings that nonnally har.c a dried fdm thickncss of less than 0.0013 cc¡timctcr

(0.0005 in.) and that thc pcrmitting agcncy has determircd cannot be applicd by any of thc applicâtioil

mcthods specified in paragraph (f (1) of this section,

$)'l'hc use of airbrush application mcthods for stenciling, lcttcring, and othcriclcntification

markings;

(v) 'fhe usc of hand-hcld sprây caû application mcthocJs; ar+d

vi) Touch-up and repair operations;'

Comment [45]: The purpose of thts proposed

language in (f)(1) is to explicitly allow the use of

these applicêt¡on methods.

Comment [46]: Th¡s proposed language

addresses the request that facilities be allowed to

choose the method by wh¡ch to demonstrate that

the êpplÌcation equipment is equ¡valent to HVLP.

Comment [A7J:Îhe purpose ofthis proposed

language is to clarify that the appl¡cðt¡on prov¡sions

are not appl¡æble to coatl'ngs that are not atomized

even when sprðy-appl¡ed. As noted ¡n our

æmments, this ¡s important to allow hand

applicat¡on w¡th adhesives, sealants, maskants,

6ulk¡ng materials and ¡nks.

Comment [48]t Th¡s proposed language ¡s based

on an exemption affecting a floor-sett¡ng source.

Comment [49]: The purpose ofthis proposed

language ¡s 10 clar¡fy that the application prov¡s¡ons

should not apply to h¡gh viscosity coat¡ngs that are

impract¡cêl to applv with HVLP or involve very small

ôpplicat¡ons that result in low em¡ss¡ons.

Comment [410]! Th¡s proposed language allows

for spec¡flc appl¡@t¡on equipment to be used.

These are very small applicatlons resulting ¡n low

emlsstons.

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(g) lnorÉianic JJ,\P emissions. Lìxccpt as providcd in parag"raph (g)(fl ofthis section, each o\\¡ncr or opcrator

of a ncw or cxistirg primeror, topcoatlp!-Speçialry-çeadt€-applicatìofl opcratiofl subjcct to this subpart m

which any of the coatings that arc spray applicd contain inorganic IJAP, shall compll with thc applicablc

rcc¡uircmcnts in paragraphs (g)(1) through (g)(3) ofttris sectron

(1) Apply thcsc coatings in a booth or hangar il which air flou, is dircctc<l clownwarcl orto ot

acrr¡ss thc part or asscmbly bcirg coatcd and exlraustcd through onc or morc outlcts

(2) Control thc aìr strcam from this opcration as follows:

(i) For cxisting sourccs, thc ou'ner or operâtor rnust choosc onc of thc f<rÌlowilg:

(A) lìefore exbausting it to thc atmosphcrc, pâss thc air strcam through a dr¡' particulatc

fìltcr system certificd using thc mcthods dcscribcd in $63.750(r) to mect or cxceed thc

cffìcicncy data points in'lablcs 12ardZloí this scction; or

Table 12--Two-Stage.&restor; Liquid Phase Challenge for Existing

Sources

Table 23-Two-Stage Arrestor; Solid Phase Challenge for Existing

Sources

(B) Bcforc cxhausting it to thc atmosphere, pass the ak strearn through

a water-wash systcm that shall rcmain in opcration during alJ coating

application opcrations; or

(O) Beforc exhaustingit to thc atmospherc, pass thc air strearn through an air

pollution coûtrol systcm thât mccts or cxcccds thc efficicncy dâta poiilts in '1'a1¡lcs 12

2¡d ?3 of this secrion and is appror.cd by thc pcrmittirg authorir)'

(iì) Ilor new sources, cithcr:

Q\) Rcfore exhausting it to the âtlrìosphere, pass the air strcam

through a dry particulatc filtcr systcm ccrtjfìcd using the methods

dcscribcd in $63.750(o) to meet or exceed the cffìcicncy data points

in Tables 34 and 45 of this scction; or

Filtration efficiency requirement, 7o {,erodynamic particle size range, ¡rm

>90 >5./

>50 >4.1

>10 >22

liltration effi ciencl' requirement. 7o {.erodvnamic Darticle size range. um

'90 >8.1

'50 >5.0

>10 >26

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Filt¡ation efficiency requirement, oZ \erodynamic particle size range, pm

'95 >20

'80 >1.0

,0.4?

Table 3FTh¡ee-Stage Arrestor; Liquid Phase Challenge for New Sou¡ces

I tott.4!-Three-Stage Arrestor; Solid Phase Challenge for New Sou¡ces

(B) Beforc cxhausting it to the atmosphere, pass the air stream

through an air pollution contlol system thât mcets or exceeds tlìe

cfficiency data points in Tables 34 and 45 of this section and is

apptoved by the permitting authoiity.

(üi) Owners or opcrators of nc$.¡ sources that have commenced

construction or rcconstruction aftcr-June 6, 1994 but prior to October 29,

1996 nay comply witÌì the following requirements in lieu of the

requirements in paragraph (Ð(2Xü) of rhis secfon:

(A) Pass tìe air strcam through eithcr a two-stage dry

Particulatc filter s1'51sm or a w¿terwash system before

exhausting it to thc ãtmosphcrc.

@) If the primer-or, topcoar- q_Epeei4lry_eoatingcontains chromium or

cadmium, control shall consist of a I-IEPA filter system, three-stagc filter

system, or other control system equivalcnt to the thr". ,tug" filter"system

as approved by the permitting âgcnc)'.

(iv) lf a dry particulatc filter system is used, the following rcquirements shall be

mct:

(A) Maintain the systcm in good working ordcr;

(B) Install a differential prcssure gaugc âcross the filter banks;

(C) Continuously monitor the prcssure drop across the filter a¡d read and

record the pressure drop once per shift or intedock the spray application

system to automaticall)' shutdown should the pressure d¡op exceed or fall

bclow the filter manufacturer's rccommcnded limit(s); and

p) 'l'ake corrective action when the pressure drop exceeds or falls below

the fiLtcr ma¡ufacturerrs rccommended limit(s).

eff ciency requirement, 7o particle size range, ¡¡m

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(r) lf a colvcntir¡nal watcrwash s1'stern is uscd, continuously monitor thc watcr flow

ratc:rnd rtad rnd rcct¡rd thc wltcr flow |at( onc( or'r shilt c¡r intcdc¡ck thc sorav

or cxcccd thc

oPcrating Proccdurcs lf a pumpless slstem is used, continuous\' molitor thc booth

paramctcr(s) that indicatc performance of the booth pcr thc manufacturcr's

rccommcncìations to maintai¡ the booth within the acceptabÌe opcrâtinéj cffìcìcnc1'

rangc rr:d rtad and rccord tllc prramctcrs once pcr shifi or intcrlock thc spray

(3) lfthc pressure drop across thc dq,particulate filtc¡ s)'stcm, as recordcd pursuâût to $63.752(d)(1), is

outside the Lirnit(s) specificd by thc fìltcr rnanufacturcr or in localh' preparcd operatilrg procedurcs, shut

down the opcration immcdiatcly an<l takc corrcctivc action If thc watcr path in the watcruâsh s)'stcm

fails thc r.isual contilruitr'/flow charactcristics chccl<, or thc water flow râtc recorded pursuaût to

563.752(d)(2) cxceeds the limit(s) spccìfìccl by thc booth manufacturcr or in localh' prepared opcratiûg

proccclurcs, or thc bor¡th manufacturer's or localh, prepared maintenance proccdurcs for thc filtcr or

water-wasb svstcm hâ\,e not becn pcrfcrrmcd as schcdulc<J, shut dow¡ thc opcration irnrnediatc\' and takc

co¡rectivc action Ïre operation shall not bc rcsumcd until thc prcssurc drop or water flow ratc is

rcturned within the specificd lirnit(s).

(4)'fhc requircrncnts ofpara¡¡raphs (g)(t) through (g)(3) ofthis scctìon do not apply to the following:

(i) 'l'ouch-up of scratchcd surfaccs or damagcd paint;

(ii) I Ioìc claubing for fasteners;

(iii) 'fouch-up of trimmcd cdgcs;

(ii') Coating prior to joining dissimilar mctal componcnts;

(r) Stencil opcrations pcrformcd by brush or ai¡ b¡ush;

(r,) Section joiring;

(r'ii) 'l'ouch-up of bushings and othcr similar parts;

(r,il) Scalarrt detr

(ix) ¡laiatlngparl ing thc spray-application of spccialty çgatinils, !n a1 41ça i51qnllred in a

titlc Y pclmit, whcre the pennitting âuthoriq' has dctermincd that it is impractical or not

technically feasible to paint thc parts in a booth.

or signifìcant modil'ìca¡ion; an tì

not cxhaustcd outsidc the buildinq:

Comment [411]: The purpose of th¡s proposed

language is to allow facil¡ties to ¡mmediately apply

th¡s appl¡cãb¡lity prov¡sion of the regulation upon

approval from the locl perm¡tt¡ng author¡ty Ether

than hav¡ng to wait untìl the T¡tle V permit reflects

the new requirements.

Comment [A12]: The purpose of th¡s proposed

language is to allow specialty coating operat¡ons

that cannot be performed in a booth,

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