ILLINOIS POLLUTION CONTROL BOARD

September

15,

1994

IN THE MATTER OF:

)

15

ROP

PLAN

 CONTROL MEASURES FOR VON

)

EMISSIONS

—

 PART III: AIR OXIDATION

)

 R94-16

AND ORGANIC EMISSIONS FROM STORAGE AND

)

 (Rulemaking)

LOADING OPERATIONS: AMENDMENTS TO

)

35 ILL. ADM.

 CODE 211,

 218 AND 219

)

Proposed Rule.

 Second Notice.

OPINION AND ORDER OF THE BOARD

 (by E.

 Dunham):

On June 15,

 1994, the Illinois Environmental Protection

Agency

 (Agency) filed this proposal for rulemaking.

 Section

182(b) (1) of the Clean Air Act (42 USC 7511(b) (1)) requires all

moderate and above ozone nonattainment areas to achieve

 a 15

reduction

 in 1990 emissions of volatile organic material

 (VOM)

by

1996.

 The Chicago and the Metro—East St. Louis areas are

classified as severe and moderate nonattainnient areas for ozone

and are subject to the 15

 reduction requirement.

 The proposed

rule represents Part III of the rules proposed in the Agency’s

15

 Rate of Progress Plan

 (ROP Plan).

 Section 182(b) (1) requires

states to submit 15

 ROP Plans within three years of the

 enactment of the CAA.

 Illinois submitted its plan on November

15,

 1993.

 On January 21,

 1994, the USEPA found the submitted

plan to be incomplete because

 it was not accompanied by fully

adopted rules.

 Illinois is currently on notice that it has 18

months to adopt the necessary rules before sanctions are imposed

under Section 179(a)

 of the CAA

 (42 USC §7509(a)).

The Board’s responsibility in this matter arises from the

Environmental Protection Act

 (Act).

 (415 ILCS 5/1 et

seq.

(1992).)

 The Board

 is charged therein to “determine, define,

and

implement the environmental control standards applicable

 in the

state of Illinois.”

 (415 ILCS 5/5(b)

 (1992).)

 More generally,

the Board’s rulemaking charge is based on the system of checks

and balances integral to the Illinois environmental governance:

the Board bears responsibility for the rulemaking and principal

adjudicatory functions; the Illinois Environmental Protection

Agency

 (Agency) has primary responsibility for administration of

the Act and the Board’s regulations.

 The latter includes

administering today’s new regulation.

This proposal was filed pursuant to Section 28.5 of the Act.

(415 ILCS 5/28.5

 (1992).)

 Pursuant to the provisions of that

section the Board is required to proceed within the set time

frames toward the adoption of the regulation.

 The Board has no

discretion to adjust these time frames under any circumstances.

Today the Board acts to send this proposal to second notice under

the Illinois Administrative Procedure Act (APA).

 (5 ILCS

100/1005—40

 (1992)

2

PROCEDURAL HISTORY

The Board sent this proposal to first notice under the APA

on June 23,

 1994,

 without commenting on the merits of the

proposal.

 The proposed rule was published in the Illinois

Register on July 8,

 1994, at 18 Ill. Reg.

10536

 (Part 211),

18

Ill.

 Reg.

10549

 (Part 218)

and

18

 Ill. Reg.

10584

 (Part 219).

A

hearing was held on August 4,

 1994,

 in Chicago, Illinois before

Board hearing officer Diane O’Neill.

 Previously—scheduled second

and third hearings were cancelled pursuant to Section 28.5(g)

of

the Act because a request for a second hearing was not received

by the Board.

 (415 ILCS 5/28.5(g)

 (1992).)

 The comment period

closed on August 22,

 1994.

PROPOSAL

The geographic areas affected by this proposal are the

Chicago and Metro—East nonattainment areas.

 The proposed

amendments to Subpart V increase the Total Resource Effectiveness

(TRE)

 index and add a “once

 in always in” provision.

 This

proposal also revises Subpart B

 (Organic Emissions from Storage

and Loading Operations)

 of Parts 218 and 219.

 This revision is

similar to the draft Control Techniques Guideline

 (CTG)

and

Alternative Control Technology

 (ACT)

 documents issued by the

United States Environmental Protection Agency.

 The proposal adds

the definitions of “fill” and “maximum true vapor pressure” to

Part 211.

 The proposal also adds the definition for “opacity” to

Part 211 from Part 240.

The proposal amends the air oxidation rules.

 The control

requirements apply to any air oxidation process with a TRE index

of 6.0 or less.

 The Agency has identified

 5 potentially affected

sources in the Chicago area.

 No air oxidation sources were found

in the Metro—East area.

The proposal requires each affected owner or operator to

reduce the VOM emissions vented by at least 98

 by weight or to

emit VON at a concentration of less than 20 parts per million by

volume, dry basis.

 The proposal also adds language which

requires continued control even if

 a change in operations results

in a TRE index that is above that which initially made the

regulation applicable.

 Similarly phthalic anhydride air

oxidation processes must maintain a control level of 90

 or the

equivalent of 50 ppmv,

 dry basis,

 until either the existing

 combustion device is considered to be replaced or December

31,

1999, whichever comes

 first.

The proposal affects owners or operators of VOL storage

facilities in the Chicago and Metro—East nonattaimnent area who

store VOL with a maximum true vapor pressure of 0.050 psia or

greater but less than 11.1 psia in any tank reservoir,

 or other

such container of more than 151 cubic meters

 (40,000 gal.)

3

The proposal requires each owner or operator of an organic

liquid storage tank with a capacity of 40,000 gallons or more and

a vapor pressure of 0.75 psia or greater but not exceeding 11.1

psia to install control systems.

 The control measures are

specified according to the type of roof on the vessel containing

the liquid.

 Owners or operators of organic liquid storage tanks

with a vapor pressure of 0.50 psia or greater but less than 11.1

psia are required to maintain certain operational records for

storage of VOL with a vapor pressure exceeding 0.75 psia to test

and monitor operations at the storage tank.

PUBLIC COMMENTS

The Board received four public comments during the public

comment period.

 Comments were submitted by the Department of

Commerce and Community Affairs

 (DCCA)

 (PC #1), the Illinois

Environmental Regulatory Group

 (IERG)

 (PC #2), the Agency

 (PC #3)

and the Administrative Code Division of the Secretary of State

 (PC #4).

 The Board has considered all public comments,

 as well

as all testimony and exhibits,

 in making its decisions in this

matter.

 In general, there is no disagreement on the part of the

participants and commenters on the substance of the proposal.

The comment from DCCA states that DCCA has reviewed the

proposal for impact on small businesses.

 DCCA defers to the

findings of the Board based on hearing and public comment.

The

Code Division suggest various form and typographical corrections

which the Board accepts and incorporates into the proposed rules.

In its comment, IERG presents additional language suggested

during the hearings.

 IERG recommends that Sections

218.120(a) (4) (C)

 and 219.120(a) (4) (C) be added to the proposed

amendments.

 These new subsections would allow owners and

operators who, prior to December 31,

 1992, had installed control

devices that were designed to reduce inlet VON emissions by

greater than or equal to 90 percent, to continue to operate the

control devices at these design levels.

 IERG also suggest the

inclusion of actual temperatures in the definition of “Maximum

True Vapor Pressure” to replace “local maximum monthly average

temperature”.

 IERG also raises its concern over the

applicability provision of the proposed rule in Sections 218.119

and 219.119.

 IERG states that these sections fail to reference

each category of VOL storage containers subject to control

 requirements within the proposal.

 IERG also suggests the

deletion of Sections 218.127(c)

 and 219.127(c)

 concerning

approval of an operating plan.

The Agency in its comment expresses its agreement with the

changes proposed by IERG.

 At hearing the Agency presented an

errata sheet noting correction of typographic errors to the

proposed amendments.

 (Exh. 1)

 The Board will make the changes

4

recommended by IERG and agreed to by the Agency.

 The Board will

also make the changes noted on the Agency’s errata sheet.

CONCLUSION

The Board finds that the proposed rules are technically

feasible and economically reasonable, and that the rules are

necessary to meet the requirements of the Clean Air Act.

 We find

that the record supports proceeding with the proposed rules

as

amended to second notice.

To assist comparison to today’s proposal with the proposal

as adopted for first notice the Board indicates significant

revisions by highlighting (redlining)

 in the order that follows.

Appropriate underlining and strikeouts are included within the

highlighted text.

ORDER

The Board hereby proposes the following amendments to 35

Ill. Adm. Code 211,

 218 and 219.

 The Board directs the Clerk to

submit the following amendments to the Joint Committee on

Administrative Rules for second notice.1

TITLE 35:

 ENVIRONMENTAL PROTECTION

SUBTITLE B:

 AIR POLLUTION

CHAPTER

I:

 POLLUTION CONTROL BOARD

SUBCHAPTER

 EMISSION STANDARDS AND LIMITATIONS

FOR STATIONARY SOURCES

PART 211

DEFINITIONS AND GENERAL PROVISIONS

211.2300

 Fill

211.3695

 Maximum True VaPor Pressure

AUTHORITY:

 Implementing Sections 9,

 9.1 and 10 and authorized by

Section 27 and 28.5 of the Environmental Protection Act

 (Ill.

Rev.

 Stat.

 1991,

oh.

 111½,

 parc.

 1009,

 1009.1,

 1010 and 1027),

(P.A.

 87-1213, effcativc September 2G.

 1992)

415

 ILCS 5/9,

 9.1,

10,

 27 and 28.5

 (1992).

For mailing purposes, the Board has omitted from the

order those portions to the tables of contents that are not

proposed to be changed in this rulemaking.

 Interested persons

may view the tables of contents in its entirety in the copy of

the proposal submitted by the Agency and retained in the Clerk’s

file.

 An entire version including the full tables of contents

was published in the Illinois Register,

 and a copy of that

submittal is available in the Clerk’s file.

5

SUBPART B:

 DEFINITIONS

Section 211.2300

 Fill

“Fill,” for purposes of 35 Ill.

 Acim.

 Code 218.119 through 218.129

and 219.119 through 219.129. means the introduction of VOL into a

storage vessel but not necessarily to comPlete capacity.

(Source:

 Added at

 Ill.

 Reg.

_____,

 effective

____________

Section 211.3695

 Maximum True Vapor Pressure

“Maximum true vaPor pressure” means the equilibrium partial

pressure exerted bY stored VOL at the temperature equal to the

highest calendar—month average of the VOL storage temperature for

V

 stored above or below the ambient temperature or at the

1nr.~1 n~a~jmwii

m9nth1~y

a~r~g~

tr~tnre~

 “e~

f

t

ac

~

ta

I

 d.at35

•

hre

~j

~

 Metro—

East nonattainm~ntarea

 as defined at:35

 Ill.

 Adni. Code 219.100

a3rcportcd by thc National

Weather Service for

~e

 ambient temperature,

 as determined:

~j

 In accordance with methods described in American

Petroleum Institute Bulletin 2517, Evaporation Loss

from External Floating Roof Tanks, incorporated by

reference at 35

 Ill.

Adin.

 Code 218.112 and 219.112; or

~j

 BY ASTM Method

D2879-83, incorporated by reference at

35

 Ill.

 Adm.

 Code 218.112(a)

(1) and 219.112(a) (1).

(Source:

 Added at

 Ill.

 Reg.

_____,

 effective

____________

Section 211.4130

 Opacity

“Opacity” means

~j

 For purposes of Part 212,

 a condition which renders

material partially or wholly impervious to

transmittance of light and causes obstruction of an

observer’s view.

 For the purposes of these

regulations, the following equivalence between opacity

and Rinaelmann shall be employed:

Opacity Percent

 Ringelmann

6

100

5.

That fraction of light, expressed

 in percent, which when

transmitted from a source through a smoke—obscured path,

is prevented from reaching the observer or instrument

receiver.

(Source:

 Amended at

—

 Ill. Reg.

_____,

 effective

___________

TITLE 35:

 ENVIRONMENTAL PROTECTION

SUBTITLE B:

 AIR POLLUTION

CHAPTER

I:

 POLLUTION CONTROL BOARD

SUBCHAPTER

c:

 EMISSIONS STANDARDS AND LIMITATIONS

FOR STATIONARY SOURCES

PART 218

ORGANIC MATERIAL EMISSION STANDARDS AND LIMITATIONS FOR THE

CHICAGO AREA

SUBPART B:

 ORGANIC EMISSIONS FROM STORAGE AND LOADING OPERATIONS

Section

218.119

218.120

218.121

218.122

218.123

218. 124

218.125

218.126

218.127

218.128

218. 129

Applicability for VOL

Control Reciuirements for

Storage Containers of VOL

Storage Containers of VPL

Loading Operations

Petroleum Liquid Storage Tanks

External Floating Roofs

Compliance Dates

 (Repealed)

Compliance Plan

 (Repealed)

Testing VOL Operations

Monitoring VOL Operations

Recordkeeping and Reporting for VOL Operations

SUBPART V:

 AIR OXIDATION PROCESSES

Section

218.520

218.521

218.522

218.523

218.524

218.525

218.526

218.527

Emission Limitations from Air Oxidation Processes

Definitions

 (Repealed)

Savings Clause

Compliance

Determination of Applicability

Emission Limitations for Air Oxidation Processes

(Renumbered)

Testing and Monitoring

Compliance Date

 (Repealed)

AUTHORITY:

 Implementing Section

10 and authorized by Section

28.5 of the Environmental Protection Act

 (Ill.

 Rev.

 Stat.

 1991,

oh.

 111½,

 par.

 1010)

 (P.A.

 87—1213, effective September

26,

 1992)

415

 ILCS

5/10 and 28.5

 (1992).

7

SUBPART B:

 ORGANIC EMISSIONS FROM STORAGE AND LOADING OPERATIONS

Section 218.119

 Applicability for VOL

The limitations of Section

218.120 of this Subpart shall apply to

all

storage

containers

volatile

organic

liquid

(VOL)

with

maximum

true

vapor

pressure

psia

greater~~

~r~4

any

stationary

tank

reservoir

other

container

 morc~

tlrnn

151

cubic

meters

(40

000

~al)

capacity

exceptto

vésiels

provided

below:

Vessels

with

capacity

 greater than or equal to 40.000

gallons storing a liquid with

 a maximum true pressure

of less than 0.5 psia

~j

 Vessels of coke oven by—product plants

gj~

 Pressure vessels designed to operate in excess of 29.4

 psia and without emissions to the atmosphere

~

 Vessels permanently attached to mobile vehicles such as

trucks,

 rail cars,

 barges,

 or ships

~j

 Vessels storing petroleum liquids;

or

~j

 Vessels used to store beverage alcohol.

...............

.........~...

.....

(Source:

 Added at _____Ill.

 Reg.

 effective_____________

Section 218.120

 Control Reguirements for Storage Containers

of VOL

Every owner or ope~

 storing VOL in a vessel of

4’

 000 ~al1

 ns or great r wit~~maxixnum rue vapor

~:~~re

 eq al to 0.75

 ~sia but less than 11.1 psia

i~ctto

 he rc~uircm:ntc

of thic Subpa ~

shall

reduce VOM emissions from storage tanks, reservoirs,

or

other containers as follows:

~j

 Each fixed roof tank shall be equipped with an

internal floating roof that meets the following

specifications or that is equipped with a vapor

control system that meets the specifications

contained

subsection

(a)

(4)

below:

~j

 The internal floating roof shall rest or

float on the liquid surface

 (but not

necessarily in complete contact with it)

inside a storage vessel that has a fixed

roof.

 The internal floating roof shall be

floating on the liquid surface at all times.

except during initial fill and during those

intervals when the storage vessel is

com~letelvemptied and subsequently refilled.

When the roof is resting on the leg supports,

the process of filling, emptying~or

refilling shall be continuous and shall be

accomplished as rapidly as possible.

~j

 Each internal floating roof shall be equipped

with one of the following closure devices

between the wall of the storage vessel and

the edge of the internal floating roof:

A foam—

 or liquid—filled seal mounted in

contact with the liquid

 (liquid-mounted

seal).

 A liquid—mounted seal means a

foam- or liquid—filled seal mounted in

contact with the liquid between the wall

of the storage vessel and the floating

roof continuously around the

circumference of the tank

 Two seals mounted one above the other so

that each forms a continuous closure

that completely covers the space between

the wall of the storage vessel and the

edae of the internal floating roof.

The

lower seal ma~be vapor—mounted, but

both must be continuous;

or

iii)

 A mechanical shoe seal, which

 is a metal

sheet held vertically against the wall

of the storage vessel by springs or

 weighted levers and is connected by

braces to the floating roof.

 A flexible

coated fabric

 (envelope)

 spans the

annular space between the metal sheet

and the floating roof.

~çj

 Each opening in a noncontact internal

floating roof except for automatic bleeder

vents

 (vacuum breaker vents) and the rim

space vents is to provide a prolection below

the liquid surface.

Qj

 Each opening in the internal floating roof

except for leg sleeves, automatic bleeder

vents,

 rim space vents, column wells,

 ladder

wells,

 sample wells, and stub drains

 is to be

equipped with a cover or lid which

 is to be

maintained

 in a closed position at all times

(i.e.,

 no visible gap) except when the device

is

 in actual use.

 The cover or lid shall be

equipped with a gasket.

 Covers on each

9

access hatch and automatic gauge float well

shall be bolted except when they are in use.

~j

 Automatic bleeder vents shall be equipped

with

 a gasket and are to be closed at all

times when the roof is floating except when

the roof is being floated off or is being

landed on the roof leg supports.

 Rim space vents shall be equipped with a

gasket and are to be set to open only when

the internal floating roof is not floating or

at the manufacturer’s recommended setting.

~j

 Each penetration of the internal floating

roof for the purpose of sampling shall be a

sample well.

 The sample well shall have a

slit fabric cover that covers at least

90

percent of the opening.

ift

 Each penetration of the internal floating

roof that allows for passage of a ladder

shall have

 a gasketed sliding cover.

~j

 During the next scheduled tank cleaning or before

March

15,

2004,

whichever

comes

first,

each

internal floating roof tank shall meet the

specifications set forth in subsection

 (a) (1) (A)

through

(H)

 above.

~j

 Each external floating roof tank shall meet the

following specifications:

~j

 Each external floating roof shall be equipped

with a closure device between the wall of the

storage vessel and the roof edge.

 The closure

device is to consist of two seals,

 one above

the other.

 The lower seal is referred to as

the primary seal,

 and the upper seal is

referred to as the secondary seal.

jj.

 Except as provided in Section

218.127(b) (4)

 of this Subpart, the

primary seal shall completely cover the

annular space between the edge of the

floating roof and tank wall and shall be

 either a liquid mounted seal or a shoe

seal.

iii.

 The secondary seal shall completely

cover the annular space between the

external floating roof and the wall of

the storage vessel in a continuous

10

fashion except as allowed

 in Section

218.127(b) (4)

 of this Subpart.

iii)

 The tank shall be equipped with the

closure device after the next scheduled

tank cleaning, but no later than March

15,

 2004.

~j

 Except for automatic bleeder vents and rim

space vents,

 each opening in a noncontact

external floating roof shall provide

a

pro-jection below the liquid surface.

 Except

for automatic bleeder vents,

 rim space vents,

roof drains,

 and leg sleeves, each opening in

the roof

 is to be equipped with a gasketed

cover,

 seal,

 or lid that is to be maintained

in

 a closed position at all times

 (i.e.,

no

visible gap)

 except when the device is in

actual use. Automatic bleeder vents are to be

closed at all times when the roof is floating

except when the roof is being floated off or

is being landed on the roof leg supports. Rim

vents are to be set to open when the roof is

being floated off the roof leg supports or at

the manufacturer’s recommended setting.

 Automatic bleeder vents and rim space vents

are to be gasketed.

 Each emergency roof drain

is to be provided with a slotted membrane

fabric cover that covers at least 90 percent

of the area of the opening.

 The roof shall be floating on the liquid at

all times

 (i.e.,

 off the roof leg supports)

except when the tank is completely emptied

and subsequently refilled. The process of

filling, emptying,

 or refilling when the roof

is resting on the leg supports shall

be

continuous and shall be accomplished as

rapidly as possible.

 Aclosedvent

 system and control device

reSpGc~tive1y

 shall meet the following

s~iif1catiôns:

 The closed vent system shall be designed to

collect all VOM vapors and gases discharged

from the storage vessel and operated with no

detectable emissions as indicated by an

instrument reading of less than 500 ppm above

background and visual inspections,

as

determined by the methods specified in

 40 CFR

60.485(c),

 incorporated by reference at

Section 218.112(d)

 of this Part.

11

~j

 The control device shall be designed and

operated

reduce

 inlet VON emissions by 95

percent

greater.

flare

used

the

control device,

shall

meet

the

specifications described in the general

control

device

requirements

CFR

60.18,

incorporated

reference

Section

218.112(d)

this

Part.

alternative

 emission control elan equivalent to

the

requirements

subsection

(a)(1),

(a)(2),

(a)

(3),

(a)

(4)

above

that

has

been

approved

the

A~encv and

the

 USEPA in a federally

enforceable permit or as

 a SIP revision.

~

 The owner or operator of each storage vessel with a

design capacity equal to or greater than 40,000 gallons

which contain VOL that,

 as stored, has a maximum true

vapor pressure greater than or equal to 11.1 psia shall

eguip each storage vessel with a closed vent system and

control device as specified in subsection

 (a) (4)

 above.

NotwIthstanding subsection

 .ib). of.~this section,

~wbere

“ar~

d”r”~s’r&e

that

the~or’troI

cirea

~ut

~_)

_;~~

1t._

LII~

•L~4Jf Li.

4Jj.

4.L~V LL.~

~LLaJ~J.~

operatéd~to

reduce

ij~t

VOM

emission

percent

(Source:

Added

_____Ill.

Reg.

 effective_____________

Section

218.121

Storage

Containers

VPL

person

shall

cause

allow

the

storage

any

V~9~

volatile

petroleum

liquid

(VPL)

with

vapor

pressure

17.24

10.34

kPa

(2--~3~

psia)

greater

294.3°K

(70°F)

any

gaseous

organic

material

any

 stationary tank,

 reservoir or other container of

than

 151 cubic meters

(40,000

gal)

capacity

unless

such

tank, reservoir or other container:

a)

 Is a pressure tank capable of withstanding the vapor

 pressure of such liquid or the pressure of the gas,

so

as to prevent vapor or gas loss to the atmosphere at

all

times;

or,

designed

and

equipped

with

one

the

following

vapor

loss

control

devices:

1)

 A floating roof which rests on the surface of the

V~G~

~

 and is equipped with a closure seal or

seals between the roof edge and the tank wall.

Such floating roof shall not be permitted if the

YG~

has

vapor

pressure

86.19

kPa

(12.5

psia)

greater

294.3°K

(70°F).

person

shall

cause

allow

the

emission

air

contaminants

into

the

atmosphere

from

any

gauging

sampling

devices

attached

such

tanks,

except

during

sampling

maintenance

operations.

 A vapor recovery system consisting of:

A)

 A vapor gathering system capable of

collecting 85

 or more of the uncontrolled

VOM that would be otherwise emitted to the

atmosphere;

 and,

B)

 A vapor disposal system capable of processing

such VON so as to prevent its emission to the

atmosphere.

 No person shall cause or allow

the emission of air contaminants into the

atmosphere from any gauging or sampling

devices attached to such tank,

 reservoir or

other container except during sampling.

3)

 Other equipment or means of equal efficiency

approved by the Agency according to the provisions

of 35

 Ill.

 Adm. Code 201, and further processed

consistent with Section 218.108.

(Source:

 Amended at

 Ill. Reg.

_____,

 effective

______________)

Section 218.125

 Compliance Dates

Every owner or operator of

 a VOL or VPL storage vessel sub~jectto

the requirements of this Subpart shall comply with the

requirements of this Subpart

 in accordance with the compliance

schedule specified in the applicable subsection below:

~j.. Every owner or operator of a VPL storage vessel of the

type included

 in Sections 218.121, 218.123 and 218.124

of this Subpart shall have complied with the

requirements of Sections 218.121, 218.123 and 218.124

by the date set forth in Section 218.106(a) or

(b)

of

this Part.

~j.

 Every owner or operator of a VOL storage vessel

 of the

type identified in Section 218.119 of this Subpart

shall comply with the requirements of Section 218.120

of this Subpart as follows:

3j

 For fixed roof tanks

 (Section 218.120(a) (1)

of

this Subpart), by March

15,

 1996.

 For internal floating roof tanks

 (Section

218.120(a) (2)

 of this Subpart), either during the

next scheduled tank cleaning or by March 15,

 2004,

whichever

comes

first

fl

For

external

floating

roof

tanks

(Section

2.i~.120(a)(3)

this

Subpart),

either

during

the

scheduled

tank

cleaning

March

15,

2004,

whichever

comes

first;

and,

41

For

closed

vent

system

and

control

device

eguipped

tanks

(Section

218.120

(a)

(4)

this

Subpart),

March

15,

1996.

(Source:

Added

Ill.

Reg.,

effective_______________

Section

218.127

Testing

VOL

Operations

The

owner

oPerator

each

storage

vessel

 specified in Section

218.119

this

Subpart

shall

comply

with

the

requirements

subsection

(a),

(b),

(c)

below.

The

applicable

subsection

for

particular

storage

vessel

depends

the

control

equipment

installed to meet the requirements of this Subpart.

~j

 After installing the control equipment necessary for

the source to comply with the requirements of Section

218.120(a) (1)

or

 (2) of this Subpart (permanently

affixed roof and internal floating roof), each owner or

operator shall:

fl

 Visually inspect the internal floating roof, the

primary seal,

 and the secondary seal

 (if one is in

service)

 prior to filling the storage vessel with

VOL.

 If there are holes,

 tears, or other openings

in the Primary seal,

 the secondary seal,

 or the

seal fabric or defects in the internal floating

roof,

 or both, the owner or operator shall repair

the items before filling the storage vessel.

21

 For vessels eguipped with a liguid-mounted or

mechanical shoe primary seal, visually inspect the

internal floating roof and the primary seal or the

secondary seal

 (if one is in service) through

manholes and roof hatches on the fixed roof at

least once every

 12 months after initial fill.

If

the internal floating roof is not resting on the

surface of the VOL inside the storage vessel, or

if there

 is liquid accumulated on the roof, or

if

the seal is detached,

 or if there are holes or

tears in the seal fabric, the owner or operator

shall repair the items or empty and remove the

storage vessel from service within 45 days.

 If a

failure that is detected during inspections

reguired in this subsection cannot be repaired

within 45 days and if the vessel cannot be emptied

within 45 days, the owner or operator may request

14

30-day

extension

 from the Agency in the

inspection report required in Section

218.129(a)

(3)

this

Subpart.

Such

request

for

an extension must document that alternate storage

capacity

 is unavailable and specify

 a schedule of

actions the owner or operator will take that will

assure that the control equipment will be repaired

 or the vessel will be emptied within 30 days.

~j

 For vessels equipped with both primary and

secondary seals

~

 Visually inspect the vessel as specified in

subsection

 (a) (4) below at least every

5

years;

or

~j

 Visually inspect the vessel as specified in

subsection

 (a) (2)

 above.

41

 Visually inspect the internal floating roof,

the

primary seal,

 the secondary seal

 (if one is in

service)

 gaskets, slotted membranes, and sleeve

seals

 (if any) each time the storage vessel is

emptied and degassed.

 If the internal floating

roof has defects, the primary seal has holes,

tears,

 or other openings in the seal,

 or if the

seal fabric or the secondary seal has holes,

tears,

 or other openings in the seal,

 or if the

seal fabric or the gaskets no longer close off the

liquid surfaces from the atmosphere, or if the

slotted membrane has more than 10 percent open

area,

 the owner or operator shall repair the items

as necessary so that none of the conditions

specified in this subsection exist before

refilling the storage vessel with VOL.

 In no event

shall

 inspections conducted in accordance with

this provision occur at intervals greater than 10

years

 in the case of vessels conducting the annual

visual inspection as specified in subsections

(a) (2) and

 (a) (3) (B)

 above and at intervals no

greater than

 5 years

 in the case of vessels

specified in subsection

 (a) (3) (A)

 above.

~j

 Notify the Agency

 in writing at least

 30 days

prior to the filling or refilling of each storage

vessel for which an inspection is required by

subsections

 (a) (1) and

 (a) (4) above to afford the

Agency the opportunity to have an observer

present.

 If the inspection required by subsection

(a) (4) above is not planned and the owner or

operator could not have known about the inspection

30 days in advance of refilling the tank, the

owner or operator shall notify the Agency at least

7 days prior to the refilling of the storage

15

vessel.

Notification

shall

made

telephone

immediately

followed

written

documentation

demonstrating

why

the

inspection

was

 unplanned.

Alternatively,

this

notification

including

the

written

documentation

may

made

writing

and

sent

express

mail

that

received

the

A~encvat

least

days

prior

the

refilling.

The

owner

oPerator

external

floating

roof

tanks

shall:

fl..

 Determine the gap areas and maximum gap widths

between the primary seal and the wall of the

storage vessel and between the secondary seal and

the wall of the storage vessel.

~j.. Measurements of gaps between the tank wall

and the primary seal

 (seal gaps)

 shall be

performed during the hydrostatic testing of

the vessel or within 60 days of the initial

fill with VOL and at least once every

 5 years

thereafter.

~

 Measurements of gaps between the tank wall

and the secondary seal shall be Performed

within

 60 days of the initial fill with VOL

and at least once per year thereafter.

~çj

 If any source ceases to store VOL for a

period of

 1 year or more,

 subseguent

introduction of VOL into the vessel shall be

considered an initial fill for the purposes

of subsections

 (b) (1) (A)

and

 (b) (1) (B)

 above.

21

 Determine gap widths and areas in the primary and

secondary seals individually according to the

following procedures:

~j

 Measure seal gaps,

 if any, at one or more

floating roof levels when the roof is

floating off the roof leg supports

~j

 Measure seal gaps around the entire

circumference of the tank in each place where

a

 1/8 inch in diameter uniform probe passes

freely

 (without forcing or binding against

seal) between the seal and the wall of the

storage vessel and measure the

circumferential distance of each such

location; and

çj

 Determine the total surface area of each gap

described in subsection

 (b) (2) (B) above bY

using probes of various widths to measure

16

accurately

the

actual

distance

from

the

tank

wall

the

seal

and

 multiplying each such

width

its

respective

 circumferential

distance.

~j.

Add

the

gap

surface

area

each

gap

location

for

the

~rimarv

seal

and

the

secondary

seal

individually

and

divide

the

sum

for

each

the

nominal

diameter

the

tank

and

compare

each

ratio

the

respective

standards

subsection

(b) (4)

below.

41

Make

necessary

repairs

em~tv the

storage

vessel

within

days

identification

any

inspection

for_seals

not

meeting

the

requirements

listed

subsections

(b)

(4)

(A)

and

(B)

below:

The

accumulated

area

gaps

between

the

tank

wall

and

the

mechanical

shoe

liquid—

mounted

primary

seal

shall

not

exceed

in.2

per

foot

tank

diameter,

and

the

width

any

portion

any

gap

shall

not

exceed

1.5

in.

There

are

holes,

tears,

other

openings in the shoe,

 seal fabric, or seal

 envelope.

~j

 The secondary seal

 is to meet the following

requirements:

~jj

The

secondary

seal

installed

above

the

primary

seal

that

completely

covers

the

space

between

the

roof

edge

and

the

tank

wall

except

provided

subsection

(b)

(2)

(C)

above.

jjj

The

accumulated

area

gaps

between

the

tank

wall

and

the

secondary

seal

used

combination

with

metallic

shoe

liquid-mounted

primary

seal

shall

not

exceed

1.0

in.2

per

foot

tank

diameter,

and

the

width

any

portion

any

gap

shall

not

exceed

0.5

in.

There

shall

gaps

between

the

tank

wall

and

the

secondary

seal

when

used

combination

with

vapor

mounted

primary

seal.

iii)

There

are

holes,

tears,

other openings in

the

seal

fabric.

Qj

If

 a failure that is detected during

inspections required in Section 218.127(b) (1)

of this Subpart cannot be repaired within 45

17

days and if the vessel cannot be emptied

within

days,

the

owner

operator

may

reauest

30—day

extension

from

the

Agency

the

inspection

report

required

Section

218.129(b)

(4)

this

Subpart.

Such

extension

request

must

include

demonstration

unavailability

alternate

storage

capacity

and

specification

schedule

that

will

assure

that

the

control

equipment

will

repaired

the

vessel

will

emptied

soon

possible.

Notify

the

Agency

days

advance

any

gap

measurements

required

subsection

(b)

(1)

above

afford

the

Agency

the

 opportunity to have an

observer

present.

~j

 Visually inspect the external floating roof, the

primary seal,

 secondary seal, and fittings each

time the vessel

 is emptied and degassed.

~j.

 If the external floating roof has defects,

if

the primary seal has holes,

 tears, or other

openings in the seal or the seal fabric,

or

if the secondary seal has holes,

 tears,

or

other openings in the seal or the seal

fabric, the owner or operator shall repair

the itenis as necessary so that none of the

conditions specified in this subsection exist

before filling or refilling the storage

vessel

with

VOL.

~j.

For

all

the

 inspections required by

subsection

(b) (6)

above,

the

owner

operator

shall

notify

the

Agency

writing

least

days

prior

the

filling

refilling

each

 storage vessel to afford

the

Agency

the

 opportunity to inspect the

storage

vessel

prior

refilling.

the

inspection

required

subsection

(b)

(6)

above

not

planned

and

the

owner

operator could not have known about the

inspection 30 days in advance of refilling

the tank,

 the owner or operator shall notify

the Agency at least

 7 days prior to the

refilling of the storage vessel. Notification

shall be made by telephone immediately

followed by written documentation

demonstrating why the inspection was

unplanned. Alternatively,

 this notification

including the written documentation may be

sent by express mail so that it is received

by the Agency at least

 7 days prior to the

refilling.

18

~j

 The owner

 or operator of each source that

is

 cquippc-d

with

closed

vcr~t

 o-y~temand oor~troldevicô a~

required in Scotior. 218.l2cHa)(4)

 of this Subpart

(other tha~~a flare) cha11~

~

 ~ubmit

 for aDproval by the Agency a~operating

plan

containing

the

information

listed

below:

~J

 Doc~cntation demonstrating that the control

device will achieve

the

required

co-ntrc~i

efficiency during maximum loading conditions.

This

documentation

~~udc

dcseriDtion of thc

gas s

 whicri entcr~

the control dcyicc,

 iriel

~

 flow z~ndVOM

content

under

varying

ligu~8—1cvcl

conditionG

~dynaniicand st~tio) and manufacturer’s

design

sprcificatigns

for

the

control

device.,

th~ co:

trol

dey~oc

-or

the

closed

vent

capture

s’istern

receives

vaporo,

gases,

1i~U1dG other

than-fuels

frpm

sources

that

arc-

not

~-~es4 nated-

sources

under

this

~u1e.,

the

cffi4~

~—4emonstratio-n

include

considcr•~~n

all

 vapors,

gases,

and

liquids received

the

closed

vent

capture

system and control devlcc.

 If an tnclosed

combustion

device

with

minimum

residence

time of 0.75

seconds

and

minimum

temperature

816~.C is

used

m.Cct

the

pcrccnt

requirements,

documentation

that

thosc

conditions

will

cxtst

t~ sufficient

meet

the

requirements

this~aragraph~

and

description

the

parameter

~jarameters

nonitorcd

ensure

that

the

control

device

will

operated

conformance

with

its

design

and

explanation

thc

criteria

used

for

selection

that

parameter.

(or

parametcrs-~

2J-

Operate

the

closed

vent

system

and

control

dcvic~

and monitor the parameters of the closed vent

~ictcr~

clnd

-oontco?

dey~ce

accord~a-ncc with

thc

~peratinq

plan

submitted

the.Agency

accordance

;:ith

subsection

~

 abovc~

wilc~

the plan was modified by the Agency during the

review

proc~s.

this

casc~

 the modified plan

applies

The owner

 or operator of each source that

 is equipped

with a closed vent system and a flare to meet the

requirements

 of Section 218.120(a) (4)

 of this Subpart

shall meet the ~~uirements

 specified

 in the general

control device requirements of

 40 CFR 60.18(e)

and

(f)

incorporated

reference

Section

218.112(d)

this

Part.

(Source:

Added

____Ill.

Reg.

 effective

______________

Section

218.128

Monitoring

VOL

Operations

~j

 Except as provided in subsection

(d)

 below, the owner

operator

each

storage

vessel

with

design

capacity greater than or equal to 40,000 gallons

storing a liquid with

 a maximum true vapor pressure

that is normally less than 0.75 psia shall notify the

Agency within 30 daYs when the maximum true vapor

pressure of the liquid exceeds 0.75 psia.

~j

 Available data on the storage temperature may be used

to determine the maximum true vapor pressure.

IL

 For vessels operated above or below ambient

temperatures,

 the maximum true vapor pressure is

calculated based upon the highest expected

calendar—month

average

the

storage

temperature.

For vessels operated at ambient temperatures, the

maximum true vapor pressure is calculated based

upon the maximum local monthly average ambient

temPerature

rePorted

the

National

Weather

Service.

21

For

other

 liquids, the vapor pressure:

~

 Determined by ASTM Method D2879-83,

incorporated by reference at Section

218.112(a) (1)

 of this Part

~j

 Measured bY an appropriate method a~~rovedby

the

Agency

and

USEPA;

~

 Calculated by an appropriate method approved

by the Agency and USEPA.

~j

 The owner or operator of each vessel storing a mixture

of indeterminate or variable composition shall be

subiect

the

following:

fl

 Prior to the initial filling of the vessel, the

maximum

true

vapor

pressure

for

the

range

anticipated

liquid

compositions

stored

will

determined

using

the

methods

described

subsection

(b)

 above.

21

 For vessels in which the vapor pressure of the

anticipated 1i~uidcomposition is 0.5 ~sia

q~at~

but

le~s th~

Q.75

psia

 ~abovc the cutoff

fcr

but

 ô~itofffor controls

20

~LiOfl

 218.119 of this Subpart, an

initial Physical test of the vapor pressure is

required;

physical

test

least

once

every

months thereafter is required as determined by the

 following methods:

~j

 ASTM Method D2879-83, incorporated by

reference at Section 218.112(a) (1)

 of this

Part;

or

~j

 ASTM Method D323-82,

 incorporated by

reference

Section

218.112(a)

(25)

this

Part;

or

~j

 As measured by an appropriate method approved

Agency.

~.j

 The owner or operator of each vessel equipped with a

closed

vent

system

and

control

device

meeting

the

specifications

Section

218.120

this

Subpart

exempt

from

the

requirements

subsections

(a)

and

(b)

above.

(Source:

Added

 Ill. Reg.

 effective

_____________)

Section 218.129

 Recordkeeping and Reporting for VOL

Operations

The

owner

operator

each

storage

vessel

specified

Section

218.120(a)

this

Subpart

shall

maintain

records

and

 furnish

reports as required by subsection

 (a),

 (b), or

(c)

 below as

appropriate for the control equipment installed to meet the

requirements of Section 218.120.

 The owner or operator shall

keen copies of all reports and recoifds required by this Section,

excePt for the records required by subsection

 (c) (1)

 below,

for

least

3years.

The

records

required

subsection

Cc)

(1)

below

shall

kent

for

the

life

the

control

 equipment.

 After installing control eauipment

accordance

with

Section 218.120(a) (1)

or

(2)

 of this Subpart

 (fixed

roof and internal floating roof),

 the owner or operator

shall:

IL

 Furnish the Agency with a rePort that describes

the control eguipment and certifies that the

control

equipment

meets

 the specifications of

Sections

218.120(a)

(1)

and

218.127(a)

(1)

this

Subpart

21

 KeeP a record

each

inspection

performed

required

 by Sections 218.127 (a) (1),

 (a) (2),

(a) (3), and

 (a) (4)

 of this Subpart. Each record

shall identify the storage vessel on which the

inspection was performed and shall contain the

21

date the vessel was inspected and the observed

condition of each component of the control

equipment

 (seals,

 internal floating roof,

and

fittings

)

fl

 If any of the conditions described in Section

218.127(a) (2)

 of this Subpart are detected during

the annual visual inspection required by Section

218.127(a) (2), report to the Agency within 30 days

of the inspection.

 The identity of the storage

vessel,

 the nature of the defects, and the date

the storage vessel was emptied or the nature of

and date the repair was made; and

il

 After each inspection required by Section

218.127(a) (3)

 of this Subpart where holes or tears

in the seal or seal fabric, or defects in the

internal floating roof,

 or other control equipment

defects listed in Section 218.127(a) (3) (B)

 of this

Subpart are discovered, report to the Agency

within 30 days of the inspection the identity of

the storage vessel and the reason

 it did not meet

the specifications of Section 218.120(a) (1)

or

(2)

or Section 218.127(a)

 of this Subpart, and list

each repair made.

~j

 After installing control equipment in accordance with

Section 218.120(a) (3)

 of this Subpart

 (external

floating roof), the owner or operator shall:

IL

 Furnish the Agency with a report that describes

the control equipment and certify that the control

equipment meets the specifications of Sections

218.120(a) (3) and 218.127(b) (2)

 (b) (3), and

(b)

(4)

 of this Subpart

21

 Within 60 days of performing the seal gap

measurements required by Section 218.127(b) (1)

of

this Subpart,

 furnish the Agency with a report

that contains:

~j

 The date of measurement

~j

 The raw data obtained in the measurement; and

~j

 The calculations of this Subpart described in

Section 218.127(b) (2)

and

 (b) (3)

 of this

Subpart

~j

 Maintain records of each gap measurement performed

as required by Section 218.127(b)

 of this Subpart.

Such records shall identify the storage vessel in

which the measurement was performed and shall

contain:

22

~

 The date of measurement

~

 The raw data obtained in the measurement; and

Qj

 The calculations described in Section

218.127(b) (2)

and

 (b)(3) of this Subpart

j~j.

 After each seal gap measurement that detects gaps

exceeding the limitations specified by Section

218.127(b) (4)

 of this Subpart,

 submit a report to

the Agency within 30 days of the inspection

identifying the vessel and containing the

information specified in subsection

 (b) (2)

 above

and the date the vessel was emptied or the repairs

were made and the date of repair.

gj

 After installing control eguipment in accordance with

Section 218.120(a) (4)

 of this Subpart

 (closed vent

system and control device other than

 a flare), the

owner or operator shall maintain the following records:

IL

 A copy of the operating plan; and

aL

 The measured values of the parameters monitored in

accordance with Section 218.127 Cc) (2) of this

Subpart.

~j

 After installing

 a closed vent system and flare to

comply with Section 218.127 of this Subpart, the owner

or operator shall:

IL

 Provide the Agency with a report containing the

measurements required by 40 CFR 60.18

 (f) (1),

 (2),

(3),

 (4),

 (5), and

 (6), incorporated by reference

at Section 218.112(d)

 of this Part,

 within

6

months of the initial start-up date

21

 Maintain records of all periods of operation

during which the flare pilot flame is absent; and

~j

 Report semiannually all periods recorded under 40

CFR 60.115b(d) (2), incorporated by reference at

Section 218.112(d)

 of this Part,

 in which the

pilot flame was absent.

~j

 The owner or operator shall maintain all records

required

this

Section,

except

 for the records

required

subsection

 (f) below, for at least

 3 years.

The

records

required

subsection

(f)

below

shall

kept

for

the

life

the

source.

.f1

 The owner

 or operator of each storage vessel specified

in Section 218.119 of this Subpart shall maintain

readily

accessible

records

the

dimension

the

23

storage

vessel

and

analysis

the

capacity

the

storage

vessel.

Each

storage

vessel

with

design

capacity

less

than

40,000

gallons

subiect

provision

this

rule

other

than

those

required

i~aintainin~ readily

acce~si~le~

records

~he

di~ension~of th~storacie vessel and analysis ~

the

çapaçitv

 of the stora~evessel.

 otio~i.~

 9~th~

gj

 Except as provided in Section 218.128

(c)

and

(d)

of

this

Subpart,

the

owner

operator

each

storage

vessel

sublect

the

requirements

Section

218.120

with

design

capacity

greater

than

equal

40,000

gallons storing a liquid with a maximum true vapor

pressure greater than or equal

 to 0.5 psia but less

than 0.75 psia shall maintain a record of the VOL

storage,

the

period

storage,

and

the

maximum

true

vapor pressure of the VOL during the respective storage

period.

(Source:

 Added at

_____

 Ill.

 Reg.

______,

 effective

___________

SUBPART V:

 AIR OXIDATION PROCESSES

Section

218.520213.525

Emission

Limitations

for

Air

Oxidation

Processes

person

shall

cause

allow

the

emission

VOM

from

any

process

vent

stream

unless

the

process

vent

stream

vented

combustion

device

which

designed

and

operated either:

1)

 To reduce the volatile organic emissions vented to

it with an efficiency of at least ninety eight

percent

 (98)

 by weight; or

emit

VOM

concentration

less

than

twenty

parts per million by volume, dry basis.

b)

 Combustion flevice at a Phthalic Anhvdride Air OxidatIon

..........

IL

Notwithstanding

subs~c±iort (a)

above,

and

 subiect

to subsection

 (b) (2) below

 no person shall cause

or

.ä,I,Iów

the

emissions of VOM through an existing

combustion device at an phthalic anhydride air

oxidation

process,

unless

the

combustion

device

operated

achieve:

control

the

volatile

organic

emissions

vented to it;

or

24

VOM

emissions

concentration

less

than

parts

per

million

volume,

dry

basis.

21

air

oxiaacion

process

vcnc

scream

tor

wnion

~jjyexisting combustion device subiect to

subse~tian

(b) ~

above

employed

control

VOH emis3ions is

ne~

required to meet the

percent

emissions

limit

until

set

forth

subsection

(a)

above

either

upon

replacing

the

combustion

device

replaced

for

~j~y

other

reasons,

which

shall

considered

include

including, but not ~e limited to, normal

maintenance,

malfunction,

accident,

and

 obsolescence, or the date of December 31,

 1999,

whichever comes

 first.

T~e

combustion

device

considered

replaced

when

~)

 All of the device

replaced;

~)

When

the

cost

the

repair

the

device

the cost of replacement of part of the device

exceeds 50

 of the cost of replacing the

entire device with a device which complies.

The

limitations

subsection

(a)

above

shall

not

apply

any

process

vent

stream

combination

process

vent

streams

which

~as

with

Total

Resource

Effectiveness

Index

(TRE)

greater

less

than

4--O~or

equal to ~Q.

 TRE shall be a~determined, by the

following

methods:

air

oxidation

process

has

than

one

process

vent

stream,

TRE

shall

the

stringent

either

the

TRE

based

upon

combination

the

process

vent

streams-r

the

TRE

based

upon

each

individual

process

vent

stream.

The

TRE

process

vent

stream

and

the

TRE

combination of process vent streams, whichever is

applicable,

 shall be determined according to the

following

equation:

TRE

E’

bF~

CF

dFH

 e(FH)”

fF°5

where:

 0.88;

TRE

 Total resource effectiveness index;

F

 Vent stream flowrate (scm/mm), at

standard

temperature

20°C;

25

 Hourly measured emissions in kg/hr;

 Net heating value of vent stream

(MJ/scm),

where

the

net

enthalpy

per

mole

offgas

based

combustion

25°C and

760

Hg,

but

the

standard

temperature

for

determining the volume

corresponding to one mole

 is 20°C,

the

definition

“Flow”;

a,b,c,

and

f

 Coefficients obtained by use of

Appendix D.

For

nonchlorinated

process

vent

streams,

the

net

heating

value,

greater

than

3.6

MJ/scm,

F shall be replaced by

 F’ for purposes of

calculating

TRE.

F’

computed

follows:

F’

/

3.6

where

and

are

defined

subsection

(c)(2)

this

Section.

The

actual

numerical

values

used

the

equation

described in subsection

(C)

(2)

above

shall

determined as follows:

All

reference

methods

and

procedures

for

determining

the

flow,

(F),

hourly

emissions,

(E),

and

net

heating,

(H),

value

shall

accordance with Appendix C.

All

coefficients

described

subsection

(c)

(2)

this

Section

shall

accordance

with Appendix D.

(Source:

 Renumbered from Section 218.525 and amended at_Ill.

Reg.

 effective

____________________)

Section

218.522

Savings

Clause

The

owner

operator

air

oxidation

process

with

TRE

1.0

less

shall

have

complied

with

the

requirements

Section

218.520

(a)

this

Subpart

the

dates

set

forth

Section

218.106

(a)

and

(b)

this

Part.

Sources

that

are

sublect

218.520

(b)

this

Subpart,

which

become

sublect

the

control

requirements of 218.520

(a)

 of this Subpart after the compliance

dates

set

out

218.106

(a)

and

(b)

this

Part

shall

comply

with

the

timetable

set

forth

within

Section

218.520

(b).

(Source:

 Added at

 Ill.

 Reg.

 effective

)

Section 218.523

 Compliance

The emissions limitations for air oxidation processes located in

Section

218.520

(a)

this

Subpart

are

applicable

air

oxidation

processes

the

effective

date

that

Section.

~j

 An owner or operator of an air oxidation process with a

TRE of 6.0 or less that is subiect to the requirements

of Section 218.520(a) of this Subpart on the effective

date of that Section shall comply with the provisions

of Section 218.520(a) by December 31,

 1999,

 or upon

startup of the emission unit, whichever comes

 first.

This subsection does not supersede the Savings Clause

rule in Section 218.522 of this Part.

~

 An owner or operator of an air oxidation process that

becomes sublect to the requirements of Section

218.520(a)

 of this Subpart after the effective date of

that Section shall comply with the requirements of

Section 218.520(a)

 upon startup of the emission unit.

(Source:

 Added at 18

 Ill.

 Reg.

_____,

 effective

)

Section 218.524

 Determination of Applicability

~j

 Sources sublect to the requirements of Section

218.520(a)

 of this Subpart either through application

of 218.520(c)

 of this Subpart or through continued

application under 218.522 of this Subpart shall

continue to be sublect to the applicable limitations

even if operations change so as to result in a TRE that

is above that which initially made the regulation

applicable to the source’s operations.

~j

 Notwithstanding Section 218.520(c)

 of this Subpart,

any

air oxidation process that utilizes a combustion device

to control process vent streams at any time shall

maintain the process in compliance with the provisions

 of Section 218.520(a)

 of this Subpart at all times

thereafter.

(Source:

 Added at 18 Ill.

 Reg.

________,

 effective_____________

Section 218 525

 Emission Limitations for Air O..idation

 Processes

(Sturce:

 Section 218.525 renumberedto Section 218.520

at:

III.

 Reg..

 effective

Section 218.Appendix C

Reference Test Methods For Air Oxidation ~..rocessesandProcedures

Introduction

27

This

Appendix

presents

the

reference

methods

and

procedures

required

for

implementing

Reasonably

Available

Control

Technology

(RACT).

Methods

and

procedures

are

identified

for

two

types

PACT implementation:

a)

 Determination of VOM destruction efficiency for evaluating

compliance with the 98 weight percent VON reduction or 20

ppmv emission limit

 specified in Sections 215.520 218.520

through 215.527 218.527 of this Part and

b)

 Determination of offgas flowrate, hourly emissions and

stream net heating value for calculating TRE.

All reference methods identified in this Appendix refer to the

reference methods specified at 40 CFR 60, Appendix A,

incorporated by reference in Section 215.105 218.112 of this

Part.

VON DESTRUCTION EFFICIENCY DETERMINATION

The following reference methods and procedures are required for

determining compliance with the percent destruction efficiency

specified in Sections 215.520 218.520 through 215.527 218.527 of

this Part.

a)

 Reference Method

 1 or 1A for selection of the sampling site.

The control device inlet sampling site for determination of

vent stream molar composition or total organic compound

destruction efficiency shall be prior to the inlet of any

control device and after all recovery devices.

b)

 Reference Methods

2,

2A,

 2C or 2D for determination of the

volumetric flowrate.

 Reference Method

 3 to measure oxygen concentration of the

air dilution correction.

 The emission sample shall be

corrected to

 3 percent oxygen.

d)

 Reference Method 25

 (a) to determine the concentration of

total organic compounds (minus methane and ethane)

 in the

control device outlet and total organic compound reduction

efficiency of the control device.

TRE DETERMINATION

The following reference methods and procedures are required for

determining the offgas flowrate,

 hourly emissions,

 and the net

heating value of the gas combusted to calculate the vent stream

 TRE.

a)

 Reference Method

 1 or 1A for selection of the sampling site.

The sampling site for the vent stream flowrate and molar

composition determination prescribed in

(b)

and

(c)

 shall be

prior to the inlet of any combustion device, prior to any

28

post-reactor dilution of the stream with air and prior to

any post—reactor introduction of halogenated compounds into

the vent stream.

 Subject to the preceding restrictions on

the sampling site,

 it shall be after the final recovery

device.

 If any gas stream other than the air oxidation vent

stream is normally conducted through the recovery system of

the affected facility, such stream shall be rerouted or

turned off while the vent stream is sampled, but shall be

routed normally prior to the measuring of the initial value

of the monitored parameters for determining compliance with

the recommended PACT.

 If the air oxidation vent stream is

normally routed through any equipment which is not a part of

the air oxidation process as defined in 35 Ill. Adm. Code

211.122 211.350 of this Part,

 such equipment shall be

bypassed by the vent stream while the vent stream is

sampled, but shall not be bypassed during the measurement of

the initial value of the monitored parameters for

determining compliance with Subpart V.

b)

 The molar composition of the vent stream shall be determined

 using the following methods:

1)

 Reference Method

 18 to measure the concentration of all

organics,

 including those containing halogens, unless a

significant portion of the compounds of interest are

polymeric (high molecular weight), can polymerize

before analysis or have low vapor pressures,

 in which

case Reference Method 25(a)

 shall be used.

2)

 ASTM D1946—67

 (reapproved 1977),

 incorporated by

reference in Section 215.105 218.112 of this Part,

to

measure the concentration of carbon monoxide and

hydrogen.

3)

 Reference Method

4

to measure the content of water

vapor,

 if necessary.

c)

 The volumetric flowrate shall be determined using Reference

Method

2,

 2A, 2C or 2D,

 as appropriate.

d)

 The net heating value of the vent stream shall be calculated

using the following equation:

n

H=K

E

 CiHi

i=1

Where:

H

 Net heating value of the sample, MJ/scm, where the

net enthalpy per mole of offgas is based on

combustion at 25°Cand 760 mm Hg, but the standard

temperature for determining the volume

corresponding to one mole is 20°C,as in the

definition of F (vent stream flowrate) below.

29

K

 Constant,

 1.740 x ~

 (1/ppm)

 (mole/scm)

 (MJ/kcal)

where standard temperature for mole/scm is 20°C.

Ci

 Concentration of sample component

 i, reported on a

wet basis,

 in ppm,

 as measured by Reference Method

18 or ASTM D1946—67

 (reapproved 1977),

incorporated by reference in Section 215.105

218.112 of this Part.

Hi

 Net heat of combustion of sample component i,

kcal/mole based on combustion at 25°Cand 760 mm

Hg.

 If published values are not available or

cannot be calculated,

 the heats of combustion of

vent stream components are required to be

determined using ASTM D2382-76, incorporated by

reference in Section 215.105 218.112 of this Part.

e)

 The emission rate of total organic compounds in the process

vent stream shall be calculated using the following

equation:

n

E=K

F

E

 CiMi

i=1

Where:

E

 Emission rate of total organic compounds (minus

methane and ethane)

 in the sample in kg/hr;

K

 Constant 2.494

 x 106 (1/ppm)

 (mole/scm)

 (kg/g)

(min/hr), where standard temperature for

(mole/scm)

 is 20°C;

Ni

 Molecular weight of sample component

i

 (g/mole);

F

 Vent stream flowrate (scm/mm),

 at a standard

temperature of 20°C.

f)

 The total vent stream concentration

 (by volume)

 of compounds

containing halogens

 (ppmv,

 by compound)

 shall be summed from

the individual concentrations of compounds containing

halogens which were measured by Reference Method

18.

(Source:

 Amended at _Ill.

 Peg.

______,

 effective

__________

30

TITLE

35:

ENVIRONMENTAL

PROTECTION

SUBTITLE

AIR

POLLUTION

CHAPTER

I:

 POLLUTION CONTROL BOARD

SUBCHAPTER c:

 EMISSIONS STANDARDS AND LIMITATIONS

FOR STATIONARY SOURCES

PART

219

ORGANIC MATERIAL EMISSION STANDARDS AND

LIMITATIONS

FOR

THE

CHICAGO

AREA

SUBPART B:

 ORGANIC EMISSIONS FROM STORAGE AND LOADING OPERATIONS

_______

Applicability

for

VOL

_______

Control

Requirements

for

Storage

Containers

VOL

Storage Containers of VPL

Loading Operations

Petroleum Liquid Storage Tanks

 External Floating Roofs

Compliance

Dates

(Repealed)

Compliance Plan

 (Repealed)

Testing VOL Operations

Monitoring VOL Operations

Recordkeeping and Reporting for VOL Operations

SUBPART V:

 AIR OXIDATION PROCESSES

________

 Emission Limitations from Air Oxidation Processes

Definitions

 (Repealed)

_______

 Savings Clause

Compliance

_______

 Determination of Applicability

Emission Limitations

 for Air Oxidation Processes

(Renumbered)

AUTHORITY:

 Implementing Section

 10 and authorized by Section

28.5 of the Environmental Protection Act

 (Ill.

 Rev.

 Stat.

 1091,

ch.

 111½,

 par.

 1010)

 (P.A.

 37—1213,

 effective

nt.~mh~

26.

1992)

415

ILCS

5/10

and

28.5

(1992).

SUBPART B:

 ORGANIC EMISSIONS FROM

STORAGE

AND LOADING OPERATIONS

Section 219.119

 Applicability for VOL

The limitations of Section 219.120 of this Subpart shall apply to

Section

219.

119

219.120

219.121

219.

122

219.123

219.124

219.125

219.

126

219.

127

219. 128

219.

129

Section

219.520

219.521

219.522

219. 523

219.524

219.525

219.526

 Testing and Monitoring

219.527

 Compliance Date

 (Repealed)

all storage containers of volatile organic liquid

 (VOL)

 with a

maximum true vapor pressure of

0

 5 0.73 psia or greater b~tlt~ct~

th~rx1~4p~iain any stationary tank,

 reservoir,

 or other

31

container of n~prothan 151 cubic meters

 (40 000 gal) capacity

o~

except

vessels

provided

below

~j

 Vessels with a capacity greater than or equal to 40,000

gallons storing a liquid with a maximum true pressure

of less than 0.5 psia

~

 Vessels of coke oven by—product plants

~j

 Pressure vessels designed to operate in excess of 29.4

psia and without emissions to the atmosphere

~1

 Vessels permanently attached to mobile vehicles such as

trucks,

 rail cars,

 barges,

 or ships

~

 Vessels storing petroleum liquids; or

£1.

 Vessels used to store beverage alcohol.

~

 Vessels ~ith

sthraq~

capacity i~ssthan

4O~OOO

c~aflons

....,

...

,.,....

 .........,....................,........,..,...............~..

(Source:

 Added at _____Ill.

 Reg.

 effective____________

Section 219.120

 Control Requirements for Storage Containers

of VOL

Every..owner

or operator storing VOL in a vessel of

4

~OC gall. ns or greater with a maximum true vapor

 -e eg al to 0.75 psia but less than 11.1 psia

~:

to

 he requirements of this Subpart shall

reduce

VOM

emissions from storage tanks,

 reservoirs,

or

other containers as follows:

IL

 Each fixed roof tank shall be equipped with an internal

floating roof that meets the following

 specifications

or that is equipped with a vapor control system that

meets the specifications contained in subsection

 (a) (4)

below:

~j

 The internal floating roof shall rest or

float on the liquid surface

 (but not

necessarily in complete contact with

it)

inside a storage vessel that has

 a fixed

roof.

 The internal floating roof shall be

floating on the liquid surface at all times,

except during

 initial fill and during those

 intervals when the storage vessel is

completely emptied and subsequently refilled.

When the roof

 is resting on the leg supports,

the process of filling,

 emptying,

or

refilling shall be continuous and shall

be

accomplished as rapidly as possible.

~1

 Each internal floating roof shall be egui~ped

with one of the following closure devices

between the wall of the storage vessel and

the edge of the internal floating roof:

LL

 A foam- or liquid-filled seal mounted in

contact with the liquid

 (liquid-mounted

seal).

 A liquid—mounted seal means a

foam- or liquid—filled seal mounted in

contact with the liquid between the wall

of the storage vessel and the floating

roof continuously around the

circumference of the tank

£jJ

 TWO seals mounted one above the other so

that each forms a continuous closure

that completely covers the space between

the wall of the storage vessel and the

edge of the internal floating roof.

The

lower seal may be vapor—mounted, but

both must be continuous; or

iii)

 A mechanical shoe seal,

 which is a metal

sheet held vertically against the wall

of the storage vessel by springs or

weighted levers and is connected by

braces to the floating roof.

 A flexible

coated fabric (enve1o~e)spans the

annular space between the metal sheet

and the floating roof.

~j

 Each opening in a noncontact internal

floating roof except for automatic bleeder

vents

 (vacuum breaker vents)

 and the rim

space vents is to provide a prolection below

the liquid surface.

Q)..

 Each opening in the internal floating roof

except for le~sleeves, automatic bleeder

vents, rim space vents, column wells, ladder

wells,

 sample wells,

 and stub drains is to be

equipped with a cover or lid which is to be

maintained in a closed position at all times

(i.e., no visible gap)

 except when the device

is in actual use.

 The cover or lid shall be

equipped with a gasket.

 Covers on each

access hatch and automatic gauge float well

shall be bolted except when they are in use.

~j

 Automatic bleeder vents shall be equipped

with

 a gasket and are to be closed at all

times when the roof

 is floating except when

the roof is being floated off or

 is being

landed on the roof le~supports.

fi

Rim

space

vents

shall

equipped

with

gasket and are to be set to open only when

the internal floating roof is not floating or

 at the manufacturer’s recommended setting.

,Qj

 Each penetration of the internal floating

roof for the purpose of sampling shall be a

sample well.

 The sample well shall have a

slit fabric cover that covers at least 90

percent of the opening.

~fl

 Each penetration of the internal floating

roof that allows for passage of

 a ladder

shall have a gasketed sliding cover.

21

 During the next scheduled tank cleaning or before

March 15,

 2004, whichever comes first,

 each

internal floating roof tank shall meet the

specifications set forth

 in subsection

 (a) (1) (A)

through

(H)

 above.

~J

 Each external floating roof tank shall meet the

following specifications:

~j

 Each external floating roof shall be equipped

with a closure device between the wall of the

storage vessel and the roof edge. The closure

device

 is to consist of two seals,

 one above

the other. The lower seal

 is referred to as

the primary seal, and the upper seal is

referred to as the secondary seal.

jj

 Except as provided in Section

219.127(b) (4)

 of this Subpart, the

primary seal shall completely cover the

annular space between the edge of the

floating roof and tank wall and shall be

either a liquid mounted seal or a shoe

seal.

£LL

 The secondary seal shall completely

cover the annular space between the

external floating roof and the wall of

the storage vessel

 in a continuous

fashion except as allowed in Section

219.127(b) (4)

 of this Subpart.

iii)

 The tank shall

 be equipped with the

closure device after the next scheduled

tank cleaning, but no later than March

15,

2004.

~j

 Except for automatic bleeder vents and rim

space vents,

 each opening in a noncontact

34

external floating roof shall provide a

prolection below the liquid surface. Except

for automatic bleeder vents, rim space vents,

roof drains, and leg sleeves, each opening in

the roof is to be equipped with a gasketed

cover,

 seal,

 or lid that is to be maintained

in a closed position at all times

 (i.e., no

visible gap)

 except when the device is in

actual use. Automatic bleeder vents are to be

closed at all times when the roof is floating

excePt when the roof

 is being floated off or

is being landed on the roof leg supports. Rim

vents are to be set to open when the roof is

being floated off the roof leg supports or at

the manufacturer’s recommended setting.

Automatic bleeder vents and rim space vents

are to be gasketed. Each emergency roof drain

 is to be provided with a slotted membrane

fabric cover that covers at least 90 percent

of the area of the oPeninq~.

Qj.

 The roof shall be floating on the liquid at

all times

 (i.e., off the roof leg supports)

except when the tank is completely emptied

and subsequently refilled. The process of

filling,

 emptying,

 or refilling when the roof

is resting on the le~su~~ortsshall be

continuous and shall

 be accomplished as

rapidly as possible.

4j

 A~~osed~en~

 system and control device

respectively shall meet the following

sp

if

ibati~o

 ñs:

~j.. The closed vent system shall

 be designed to

collect all VOM vapors and gases discharged

from the storage vessel and operated with no

detectable emissions as indicated by an

instrument reading of less than 500 ppm above

background and visual inspections, as

determined by the methods specified in 40 CFR

60.485(c),

 incorporated by reference at

Section 219.112(d)

 of this Part.

~

 The control device shall be designed and

operated to reduce inlet VOM emissions by 95

percent or greater.

 If a flare

 is used as the

control device,

 it shall meet the

specifications described in the general

control device requirements of 40 CFR 60.18,

incorporated by reference at Section

219.112(d)

 of this Part.

~j

 An alternative emission control ~1an equivalent to

the requirements of subsection

 (a) (1),

 (a) (2),

f a) (3), or

 (a) (4) above that has been approved by

the A~encvand the USEPA in a federally

enforceable permit or as

 a SIP revision.

~j

 The owner or operator of each storage vessel with

a

design capacity equal to or greater than 40,000 gallons

which contain VOL that,

 as stored, has a maximum true

vapor pressure greater than or eaual to 11.1 psia shall

equip each storage vessel with a closed vent system and

control device as specified in subsection

 (a) (4)

 above.

gl

 NOtwithstanding subsecticn

 (b) of this.~sectidn, where

anbwner~qr operatg~’.can demonstrate that the cOntrol

December

 31, 199~, as design

d

 reduc

 in1et.V~

but

I dev~cs,s~aiL.~h~

~ent or

(Source:

Added

Ill.

Reg.

______,

 effective_____________

Section 219.121

 Storage Containers of VPL

No person shall cause or allow the storage of any ~L

 volatile

petroleum

liquid

(VPL)

with

vapor

pressure

17.24

10.34

kPa

(-2--s ~

 psia)

 or greater at 294.3°I

 (70°F) or any gaseous organic

material in any stationary tank, reservoir or other container of

more than 151 cubic meters

 (40,000 gal) capacity unless such

tank, reservoir or other container:

a)

 Is a pressure tank capable of withstanding the vapor

pressure of such liquid or the pressure of the gas,

so

as to prevent vapor or gas loss to the atmosphere at

all times;

or,

b)

 Is designed and equipped with one of the following

vapor loss control devices:

1)

 A floating roof which rests on the surface of the

3~j~

 and is equipped with a closure seal or

seals between the roof edge and the tank wall.

Such floating roof shall not be permitted if the

3~ has a vapor pressure of 86.19 kPa

 (12.5

psia)

 or greater at 294.3°K(70°F). No person

shall cause or allow the emission of air

contaminants into the atmosphere from any gauging

or sampling devices attached to such tanks, except

during sampling or maintenance operations.

2)

 A vapor recovery system consisting of:

36

vapor

gathering

system

capable

collecting

the

uncontrolled

VOM

that

would

otherwise

emitted

the

atmosphere;

and,

vapor

disposal

system

capable

processing

such VOM so as to prevent its emission to the

atmosphere.

 No person shall cause or allow

the emission of air contaminants into the

atmosphere from any gauging or sampling

devices attached to such tank,

 reservoir or

other container except during sampling.

3)

 Other equipment or means of equal efficiency

approved by the Agency according to the provisions

of 35

 Ill.

 Adm. Code 201, and further processed

consistent with Section 219.108.

(Source:

 Amended at_Ill.

 Peg.

______,

 effective_______________

Section 219.125

 Compliance Dates

Every owner or operator of a VOL or VPL storage vessel sublect to

the requirements of this Subpart shall comply with the

requirements of this Subpart in accordance with the compliance

schedule specified in the applicable subsection below:

~j

 Every owner or operator of a VPL storage vessel of the

tv~eincluded in Sections 219.121,

 219.123 and 219.124

of this Subpart shall have complied with the

requirements of Sections 219.121,

 219.123 and 219.124

bY the date set forth

 in Section 219.106(a)

or

(b)

of

this Part.

~j

 Every owner or operator of

 a VOL storage vessel of the

tv~eidentified in Section 219.119 of this Subpart

shall comply with the requirements of Section 219.120

of this Subpart

 as follows:

IL

 For fixed roof tanks

 (Section 219.120(a) (1)

of

this Subpart),

 by March 15,

 1996.

21

 For internal floating roof tanks

 (Section

219.120(a) (2)

 of this Subpart), either during the

next scheduled tank cleaning or by March

15,

 2004,

whichever comes first

~J..

For external floating roof tanks

 (Section

219.120(a) (3)

 of this Subpart), either during the

next scheduled tank cleaning or by March

15,

 2004,

whichever comes first; and,

37

.41

 For closed vent system and control device equipped

tanks

 (Section 219.120(a) (4)

 of this Subpart),

by

March

15,

 1996.

(Source:

 Added at

 Ill. Reg._,

 effective

______________

Section 219.127

 Testing VOL Operations

The owner or operator of each storage vessel specified in Section

219.119 of this Subpart shall comply with the requirements of

subsection

 (a),

 (b), or

(c)

 below.

 The applicable subsection for

a particular storage vessel depends on the control equipment

installed to meet the requirements of this Subpart.

~

 After installing the control equipment necessary for

the

source

comply

with

the

requirements

Section

219.120(a) (1)

or

(2)

 of this Subpart (permanently

affixed roof and internal floating roof), each owner or

operator

shall:

IL

 Visually inspect the internal floating roof, the

primary seal,

 and the secondary seal

 (if one is in

service) prior to filling the storage vessel with

VOL.

 If there are holes,

 tears, or other openings

in the primary seal,

 the secondary seal,

 or the

seal fabric or defects in the internal floating

roof,

 or both,

 the owner or operator shall repair

the items before filling the storage vessel.

21

 For vessels equipped with a liquid-mounted or

mechanical shoe primary seal, visually inspect the

internal floating roof and the primary seal or the

secondary seal

 (if one

 is in service) through

manholes and roof hatches on the fixed roof at

least once every

 12 months after initial fill.

If

the internal floating roof is not resting on the

surface of the VOL inside the storage vessel,

or

if there is liquid accumulated on the roof,

 or if

the seal

 is detached, or if there are holes or

tears

 in the seal fabric,

 the owner or operator

shall repair the items or empty and remove the

storage vessel from service within 45 days.

 If a

failure_that is detected during inspections

required in this subsection cannot be repaired

within 45 days and if the vessel cannot be emptied

within 45 days, the owner or operator may request

a 30-day extension from the Agency in the

inspection report required in Section

219.129(a) (3)

 of this Subpart. Such a request for

an extension must document that alternate storage

capacity is unavailable and specify a schedule of

actions the owner or operator will take that will

assure that the control equipment will be repaired

or the vessel will be emptied within

 30 days.

38

~j.

 For vessels equipped with both primary and

secondary seals

~j

 Visually inspect the vessel as specified in

subsection

(a)

(4)

below at least every

5

years;

or

~j

 Visually inspect the vessel as specified in

subsection

 (a) (2)

 above.

41

 Visually inspect the internal floating roof,

the

primary seal,

 the secondary seal

 (if one is in

service), gaskets, slotted membranes, and sleeve

 seals

 (if any) each time the storage vessel is

emptied and degassed.

 If the internal floating

roof has defects, the primary seal has holes,

tears, or other openings in the seal,

 or if the

seal fabric or the secondary seal has holes,

tears,

 or other openings in the seal,

 or if the

seal fabric or the gaskets no longer close off the

liquid surfaces from the atmosphere,

 or if the

slotted membrane has more than 10 percent open

area,

 the owner or operator shall repair the items

as necessary so that none of the conditions

specified in this subsection exist before

refilling the storage vessel with VOL.

 In no event

shall inspections conducted in accordance with

this provision occur at intervals greater than 10

years

 in the case of vessels conducting the annual

visual inspection as specified in subsections

(a) (2) and

 (a) (3) (B) above and at intervals no

greater than

 5 years

 in the case of vessels

specified in subsection

 (a) (3) (A)

 above.

~j

 Notify the Agency in writing at least 30 days

prior to the filling or refilling of each storage

vessel for which an inspection

 is required by

subsections

 (a) (1) and

 (a) (4)

 above to afford the

Agency the opportunity to have an observer

present.

 If the inspection required by subsection

(a) (4)

 above is not planned and the owner or

operator could not have known about the inspection

30 days in advance of refilling the tank, the

owner or operator shall notify the Agency at least

7 days prior to the refilling of the storage

vessel. Notification shall

 be made by telephone

immediately followed by written documentation

demonstrating why the inspection was unplanned.

Alternatively, this notification including the

written documentation may be made in writing and

sent by express mail so that it is received by the

Agency at least

 7 days prior to the refilling.

39

~j

 The owner or operator of external floating roof tanks

shall:

IL

 Determine the gap areas and maximum gap widths

between the primary seal and the wall of the

storage vessel and between the secondary seal and

the wall of the storage vessel.

~j

 Measurements of gaps between the tank wall

and the primary seal

 (seal gaps)

 shall be

performed during the hydrostatic testing of

the vessel or within 60 days of the initial

fill with VOL and at least once every

 5 years

thereafter.

~j

 Measurements of gaps between the tank wall

and the secondary seal shall be performed

within 60 days of the initial fill with VOL

and at least once per year thereafter.

~j

 If any source ceases to store VOL for a

 period of

 1 year or more,

 subsequent

introduction of VOL into the vessel shall be

considered an

 initial fill for the purposes

of subsections

 (b) (1) (A)

and

 (b) (1) (B)

 above.

21

 Determine gap widths and areas in the primary and

secondary seals individually according to the

following procedures:

~j

 Measure seal gaps,

 if any,

 at one or more

floating roof levels when the roof is

floating of f the roof le~supports

~j

 Measure seal gaps around the entire

circumference of the tank in each place where

a 1/8

 inch in diameter uniform probe passes

freely

 (without forcing or binding against

seal)

 between the seal and the wall of the

storage vessel and measure the

circumferential distance of each such

location; and

~j

 Determine the total surface area of each gap

described in subsection

 (b) (2) (B)

 above by

using probes of various widths to measure

accurately the actual distance from the tank

wall to the seal and multiplying each such

width by its respective circumferential

distance.

~j.

 Add the gap surface area of each gap location for

the primary seal and the secondary seal

individually and divide the sum for each by the

40

nominal diameter of the tank and compare each

ratio

the

respective

standards

subsection

(b)

(4)

below.

41

Make

necessary

repairs

empty

the

storage

vessel

within

45

days of identification in any inspection

for seals not meeting the requirements listed

in

subsections

(b)

(4)

(A)

and

(B)

 below:

~j

 The accumulated area of gaps between the tank

wall and the mechanical shoe or liquid-

mounted primary seal shall not exceed 10

 in.2

per foot of tank diameter, and the width of

any portion of any gap shall not exceed 1.5

in. There are to be no holes,

 tears,

 or other

openings in the shoe,

 seal fabric, or seal

envelope.

~j

 The secondary seal is to meet the following

requirements:

ii

 The secondary seal

 is to be installed

above the primary seal so that

it

completely covers the space between the

roof edge and the tank wall except as

provided in subsection

 (b) (2) (C)

 above.

~JJ.

The accumulated area of gaps between the

tank wall and the secondary seal used

in

combination with

 a metallic shoe or

liquid-mounted primary seal shall not

exceed 1.0

 in.2 per foot of tank

diameter,

 and the width of any portion

of any gap shall not exceed 0.5

in.

There shall be no gaps between the tank

wall and the secondary seal when used

in

combination with

 a vapor mounted primary

seal.

iii)

 There are to be no holes, tears,

or

other openings in the seal or seal

fabric.

~j

 If a failure that

 is detected during

inspections required in Section 219.127(b) (1)

of this Subpart cannot be repaired within 45

days and if the vessel cannot be emptied

within 45 days,

 the owner or operator may

request a 30—day extension from the Agency in

the inspection report required in Section

219.129(b) (4)

 of this Subpart.

 Such extension

request must include a demonstration of

unavailability of alternate storage capacity

and

 a specification of

 a schedule that will

assure that the control equipment will be

repaired or the vessel will be emptied as

soon as possible.

~j.

 Notify the Agency

 30 days in advance of any gap

measurements required by subsection

 (b) (1)

 above

to afford the Agency the opportunity to have an

observer present.

~j

 Visually inspect the external floating roof, the

Primary

seal,

secondary

seal,

and

fittings

 each

time

the

vessel

emptied

and

degassed.

~j.

 If the external floating roof has defects,

if

the primary seal has holes, tears,

 or other

openings

 in the seal or the seal fabric,

or

if

the secondary seal has holes,

 tears,

or

other openings in the seal or the seal

fabric, the owner or operator shall repair

the items as necessary so that none of the

conditions specified in this subsection exist

before filling or refilling the storage

vessel with VOL.

.~j

 For all the inspections required by

subsection

 (b) (6)

 above,

 the owner or

operator shall notify the Agency in writing

at least 30 days prior to the filling or

refilling of each storage vessel to afford

the Agency the opportunity to inspect the

storage vessel prior to refilling.

 If the

inspection required by subsection

 (b) (6)

above

 is not planned and the owner or

operator could not have known about the

inspection 30 days in advance of refilling

the tank,

 the owner or operator shall notify

the Agency at least

 7 days prior to the

refilling of the storage vessel. Notification

 shall be made by telephone immediately

followed by written documentation

demonstrating why the inspection was

unplanned. Alternatively, this notification

including the written documentation may be

sent by express mail so that it is received

by the Agency at least

 7 days prior to the

refilling.

42

~.

 Documçntation dcmonstratincr. that the oontrol

device ~Jil1achieve the required control

efficiency during maximum loadinq. conditions.

Thir~dee~imontationis to include a

dcocri~tionof the

gpp

otream which .cntcr~

th~control device,

 inoludinct flow and VOM

content under varying liquid lovol oondjtjonc

(dync~ia

and

~tatio) and ~m~inufaoturer’s

design specifications for the control device.

If the control device or the closed vent

capture ~svstomreceives vapors,

 gasps,

or

1iguidc~other than fuels

f1~9m

~oi~roô~that

arc not designated sources under thiB rule,

the efficiency demonstration is.to include

considcration of all vapors,

 gasco,

and

liquids received by the-c-1~o~odvent o~iptura

syptem

 and control device.

 If an enclosed

conthustion devise with a mn~4raumr~idencc

time

0.75

seconds

and

 a mininuma

~e~cratur~

 31Gc

 to used

to

meet the 95

~

deeui~icntation

that

those oor~c~it~ons

 ‘~:il1

c~dot

icouffioiont

t~o

~ee~—e—~eei-u4~cments

 of this paragraph; and

~

 A dcscr4’et~on.of the pa~metcror ~arame~e~

~,.be~opitorçd

 to ensure that the aontrQl

device will b~.operatcdin conformance with

i~

design and an explanation of the criteria

used for 3clcotion of that ~arameter

(or

parameters).

Ac~ency

‘~

The

owner

ooerator

each

source

that

equipped

with

closed

vent

system

and

flare

meet

the

requirements

Section

219.120(a)

(4)

this

Subpart

shall

meet

the

requirements

specified

the

general

control device requirements of 40 CFR 60.18(e)

and

 (f),

incorporated by reference at Section 219.112(d)

 of this

Part.

(Source:

Added

—

 Ill.

 Peg.

effective________________

Section

219.128

Monitoring

VOL

Operations

~

 ExcePt as provided in subsection

(d)

 below, the owner

or operator of each stora~evessel with

 a design

43

capacity greater than or equal to 40,000 gallons

storing a liquid with

 a maximum true vapor pressure

that is normally less than 0.75 psia shall notify the

Agency within 30 days when the maximum true vapor

pressure of the liquid exceeds 0.75 psia.

~j

 Available data on the storage temperature may be used

to determine the maximum true vapor pressure.

11.

 For vessels operated above or below ambient

temperatures, the maximum true vapor pressure is

calculated based upon the highest expected

calendar—month average of the storage temperature.

For vessels operated at ambient temperatures, the

maximum true vapor pressure is calculated based

upon the maximum local monthly average ambient

temperature as reported by the National Weather

Service.

21

 For other liquids, the vapor pressure:

~j

 Determined by ASTM Method D2879—83,

incorporated by reference at Section

219.112(a) (1)

 of this Part

~j.

 Measured by an appropriate method approved by

the Agency and USEPA;

or

çj

 Calculated by an appropriate method approved

bY the Agency and USEPA.

~gj

 The owner or operator of each vessel storing

 a mixture

of indeterminate or variable composition shall be

subiect to the following:

il

 Prior to the initial filling of the vessel, the

maximum true vapor pressure for the range of

anticipated liquid compositions to be stored will

be determined using the methods described in

subsection

(b)

 above.

21

 For vessels in which the vapor pressure of the

anticipated liquid composition is ~

 usia gr

~reat~rbut less

 thati

0.75 p~iaabove the cutoff

fôrmoiii~d~Tn

g

but heI~wthe

citoff for controls

as defined in Section 219.119 of this Subpart, an

initial physical test of the vapor pressure is

required;

 a physical test at least once every

6

months thereafter is required as determined by the

following methods:

~j

 ASTM Method D2879-83,

 incorporated by

reference at Section 219.112 (a) (1)

 of this

Part; or

44

~j

 ASTM Method D323-82, incorporated by

reference at Section 219.112 (a) (25)

 of this

Part;

measured

 an appropriate method approved

 Agency.

~j

 The owner or operator of each vessel equipped with a

closed vent system and control device meeting the

specifications of Section 219.120 of this Subpart is

exempt from the requirements of subsections

 (a) and

(b)

above.

(Source:

 Added at

—

 Ill. Reg.

 effective

______________

Section 219.129

 Recordkeeping and Reporting for VOL

Operations

The owner or operator of each storage vessel specified in Section

219.120(a)

 of this Subpart shall maintain records and furnish

reports as required by subsection

 (a),

 (b),

or

 (c) below as

appropriate for the control equipment installed to meet the

requirements of Section 219.120.

 The owner or operator shall

keep copies of all reports and records required by this Section,

except for the records required by subsection

 (c) (1)

 below,

for

at least

 3 years. The records required by subsection

 (c) (1) below

shall be kept for the life of the control equipment.

~j

 After installing control equipment in accordance with

Section 219.120(a) (1)

or

(2)

 of this Subpart

 (fixed

roof and internal floating roof),

 the owner or operator

shall:

 Furnish the Agency with

report

that

describes

the

control

equipment

and

certifies

that

the

control equipment meets the specifications of

Sections 219.120(a) (1)

 and 219.127(a) (1)

 of this

Subpart

21

 Keep

 a record of each inspection performed as

required by Sections 219.127(a) (1).

 (a)(2),

(a) (3), and

 (a) (4)

 of this Subpart. Each record

shall identify the storage vessel on which the

inspection was performed and shall contain the

date the vessel was inspected and the observed

condition of each component of the control

equipment

 (seals, internal floating roof,

and

fittings)

~j

 If any of the conditions described

 in Section

219.127

(a)

(2)

this

Subpart

are

detected

during

the annual visual inspection required by Section

219.127(a) (2), report to the Agency within 30 days

of the inspection.

 The identity of the storage

45

vessel,

the

nature

the

defects,

and

the

date

the

storage

vessel

was

emptied

the

nature

and date the repair was made; and

j)

 After each inspection required by Section

219.127 (a) (3)

 of this Subpart where holes or tears

the

seal

fabric,

defects

the

internal floating roof,

 or other control equipment

defects listed

 in Section 219.127 (a) (3) (B) of this

Subpart are discovered,

 report to the Agency

within 30 days of the inspection the identity of

the storage vessel and the reason it did not meet

the specifications of Section 219.120(a) (1)

or

(2)

or Section 219.127(a)

 of this Subpart, and list

each repair made.

~j

 After installing control equipment in accordance with

Section 219.120(a) (3)

 of this Subpart

 (external

floating roof),

 the owner or operator shall:

IL

 Furnish the Agency with a report that describes

the control equipment and certify that the control

equipment meets the specifications of Sections

219.120 (a) (3)

 and 219.127(b) (2),

 (b) (3),

and

(b) (4) of this Subpart

21

 Within 60 days of performing the seal gap

measurements required by Section 219.127(b) (1)

of

this Subpart, furnish the Agency with a report

that contains:

~j

 The date of measurement:

The

raw

data

obtained

the

measurement;

and

The

calculations

this

Subpart

described

Section

219.127(b)

(2)

and

(b)

(3)

this

Subpart

~

 Maintain records of each gap measurement performed

as required by Section 219.127(b)

 of this Subpart.

Such

records

shall

identify

the

 storage vessel in

which

the

measurement

was

performed

and

shall

contain:

~j

 The date of measurement

The

raw

data

obtained

 the measurement; and

çj

The

calculations

described

Section

219.127(b) (2)

 and (b)(3)

 of this Subpart

41

 After each seal gap measurement that detects gaps

exceeding

the

 limitations specified by Section

219.127(b) (4)

 of this Subpart, submit a report to

the Agency within

 30 days of the inspection

identifying

the

vessel

and

containing

the

information

specified

 in subsection

 (b) (2) above

and

the

date

the

vessel

 was emptied or the repairs

were

made

and

the

date

 repair.

gj

 After installing control equipment

 in accordance with

Section 219.120(a) (4)

 of this Subpart

 (closed vent

system and control device other than a flare)

the

owner

operator

shall

maintain

the

following

records:

IL

A

copy

the

operating

plan;

and

21

The

measured

values

the

parameters

monitored

accordance with Section 219.127(c) (2)

 of this

Subpart.

~

 After installing a closed vent system and flare to

comply with Section 219.127 of this Subpart, the owner

or oPerator shall:

 Provide the Agency with a report containing the

measurements

required

CFR

60.18

(f)(l),

(2),

(3),

 (4),

 (5),

and

 (6),

 incorporated by reference

at Section 219.112(d)

 of this Part,

 within

6

months of the initial start-up date

21

 Maintain records of all periods of operation

during

which

 the flare pilot flame is absent; and

fl

Report

semiannually

 all periods recorded under 40

CFR 60.115b(d) (2), incorporated by reference at

Section

219.112(d)

this

 Part,

 in which the

pilot

flame

was

 absent.

~J

The

owner

operator

shall

maintain

all

records

required by this Section,

 except for the records

required by subsection

(f)

 below,

 for at least

 3 years.

The records required by subsection

(f)

 below shall be

kept for the life of the source.

ZI

 The owner or operator of each storage vessel specified

in_Section 219.119

 of this Subpart shall maintain

readily

accessible

records

the

dimension

the

storage vessel and an analysis of the capacity of the

storage vessel. Each storage vessel with

 a design

capacity less than 40,000 gallons is subject to no

provision of this rule

other

than those required by

maintaining readily accessible records

of

the

thinensions

the

storage

vessel

and

analysis

th?

capacity df the storage vesse1.See-~4en2.19.128.of:thi~

47

gj.

 Except as provided

 in Section 219.128

(c)

and

(d)

of

this Subpart, the owner or operator of each storage

vessel subject to the requirements in Section 219.120

with a design capacity greater than or equal to 40,000

gallons storing a

 liquid with a maximum true vapor

pressure greater than or equal to 0.5 psia but less

than 0.75 psia shall maintain a record of the VOL

storage, the period of storage,

 and the maximum true

vapor pressure of the VOL during the respective storage

period.

(Source:

 Added at

—

 Ill.

 Reg.

 effective

)

SUBPART

AIR

OXIDATION

 PROCESSES

Section 219.520219.525

 Emission Limitations for Air Oxidation

Processes

a)

 No person shall cause or allow the emission of VOM from

any process vent stream unless the process vent stream

is vented to a combustion device which

 is designed and

operated either:

1)

 To reduce the volatile organic emissions vented to

 it with an efficiency of at least ninety eight

percent

 (98)

 by weight; or

2)

 To emit VOM at a concentration less than twenty

parts per million by volume, dry basis.

b)

 combustion Device at a Phthalir Anhydride Air Oxxd~t

Notwithstanding ~ub~eetio~

 (a) above

 and subiect

to ~ubsection

 (b) (2)

 below,

 no person shall cause

or allow the emissions of VOM through an existing

combustion device at an phthalic anhydride air

oxidation process, unless the combustion device

is

operated to achieve:

~j

90

 control of the volatile organic emissions

vented to it; or

~

 VOM emissions concentration of less than 50

parts per million by volume, dry basis.

.ç

A air oxidat

.4. i..,

...,

.a ~

j..,

 which

~

 existing combustion device subject to

subsection

 (b) (1~above is employed to control

pr

ocecs

VbM

cmiO~ions

 required to meet the

98 percent emissions limit until set forth in

subsection

(a)

 above either upon replacing the

combustion device is replaced for

~

 other

 reasons, which shall be considered to include

including, but not—se limited to, normal

maintenance, malfunction, accident, and

obsolescence,

 or the date of December 31,

 1999,

whichever comes first.

 £~heA combustion device

is

considered to be replaced when

*~)

All of the device is replaced; or

~)

 When the cost of the repair of the device or

the cost of replacement of part of the device

exceeds 50

 of the cost of replacing the

entire device with a device which complies.

c)

 The limitations of subsection

 (a) above shall do not

apply

any

process

 vent stream or combination of

process vent streams which ~ae with a Total Resource

Effectiveness Index

 (TRE)

 greater less than ~l--Gg~

equal to

~Q.

 TRE shall be ~s determined by the

following methods:

1)

 If an air oxidation process has more than one

process

vent

stream,

~

 TRE shall be the more

stringent of either the TRE based upon a

combination of the process vent streams-- or the

TRE based upon each individual process vent

stream.

2)

 The TRE of a process vent stream and the TRE of a

 combination of process vent streams,, whichever is

applicable,

 shall be determined according to the

following equation:

TRE

E1

a

bF~

 + dFH + e(FH)~

fF°5)

where:

n

 0.88;

TRE

Total

resource

effectiveness

index;

F

Vent

stream

flowrate

(scm/mm),

a standard temperature of 20°C;

E

 Hourly measured emissions in kg/hr;

H

Net

heating value of vent stream

(MJ/scm), where the net enthalpy

per mole of offgas is based on

combustion

25°C and

760

Hg,

but the standard temperature for

determining the volume

corresponding to one mole is 20°C,

as in the definition of ‘TFlow”;

a,b,c,

d,

e

and f=

 Coefficients obtained by use of

Appendix D.

3)

 For nonchlorinated process vent streams,

 if the

net heating value,

H,

 is greater than 3.6 MJ/scm,

F shall be replaced by F’ for purposes of

 calculating TRE.

 F’

 is computed as follows:

F’

FH

/

3.6

where F and H are as defined in subsection

(c)

(2)

 of this Section.

4)

 The actual numerical values used in the equation

described

subsection

(c)

 (2) above shall

be

determined as follows:

A)

 All reference methods and procedures for

determining

the

flow,

(F),

hourly

emissions,

(E),

and

net

heating,

(H),

value

shall

accordance with Appendix C.

B)

 All coefficients described in subsection

(c)

(2)

this

Section

shall

 accordance

with

Appendix

(Source:

 Section 219.520 renumbered from Section 219.525 and

amended at

 Ill. Reg.

_____,

 effective

__________________)

Section 219.522

 Savings Clause

The

owner

operator

 air oxidation process with a TRE of

1.0 or less shall have complied with the requirements of Section

219.520

(a)

 of this Subpart by the dates set forth

 in Section

219.106

(a)

and

(b)

 of this Part.

 Sources that are sublect to

219.520

(b)

 of this Subpart, which become subject to the control

requirements of 219.520

(a)

 of this Subpart after the compliance

dates set out in 219.106

 (a) and

(b)

 of this Part shall comply

with the timetable set forth within Section 219.520

 (b).

(Source:

 Added atlll.

 Reg.

 effective

___________

Section 219.523

 Compliance

The emissions limitations for air oxidation processes located in

Section 219.520

(a)

 of this Subpart are applicable to air

oxidation processes on the effective date of that Section.

~j

 An owner

 or operator of an air oxidation process with a

TRE of 6.0 or less that is subject to the requirements

of Section 219.520(a)

 of this Subpart on the effective

date of that Section shall comply with the provisions

of Section 219.520(a)

 by December 31,

 1999,

 or upon

startup of the emission unit, whichever comes first.

This subsection does not supersede the Savings Clause

rule in Section 219.522 of this Part.

~j

 An owner or operator of an air oxidation process that

becomes subject to the requirements of Section

219.520(a)

 of this Subpart after the effective date of

that Section shall comply with the requirements of

Section 219.520(a)

 upon startup of the emission unit.

(Source:

 Added at

—

 Ill. Peg.

____,

effective

_______________

Section 219.524

 Determination of Applicability

~

 Sources sublect to the requirements of Section

219.520(a)

 of this Subpart either through application

219.520(c)

this

Subpart

through

continued

application under 219.522 of this Subpart shall

continue to be subject to the applicable limitations

even if operations change so as to result

in

 a TRE that

is above that which initially made the regulation

applicable

the

source’s

operations.

~j

 Notwithstanding Section 219.520(c)

 of this Subpart, any

air oxidation process that utilizes a combustion device

to control process vent streams at any time shall

maintain the process in compliance with the provisions

Section

219.520(a)

this

Subpart

all

times

thereafter.

(Source:

 Added at

 Ill. Peg.

______,

effective

_____________

Séctión 219.525

 Emission Limitations for AirOxidatiOn Processes

~Renumbered~

:~Source: Section 219.525 renumbered to Section 21:9.52Oat 18

Ill.

 Req.

 effective

)

Section 219.Appendix C

Reference

Tcct

Methods

For

Air

Oxidation

i.uucccccsand

 Procedures

Introduction

This

Appendix

presents

the

reference

methods

and

procedures

required for implementing Reasonably Available Control Technology

(PACT).

 Methods and procedures are identified

for two types of

PACT implementation:

a)

 Determination of VON destruction efficiency for evaluating

compliance with the 98 weight percent VON reduction or 20

ppmv

emission

limit

specified

 Sections 215.520 219.520

through 215.527 219.527 of this Part and

b)

 Determination of offgas flowrate, hourly emissions and

stream net heating value for calculating TRE.

All reference methods identified in this Appendix refer to the

reference methods specified at 40 CFR 60, Appendix A,

incorporated by reference in Section 215.105 219.112 of this

 Part.

VOM DESTRUCTION EFFICIENCY DETERMINATION

The following reference methods and procedures are required for

determining compliance with the percent destruction efficiency

specified in Sections 215.520 219.520 through 215.527 219.527 of

this Part.

a)

 Reference Method

 1 or 1A for selection of the sampling site.

The control device inlet sampling site for determination of

vent stream molar composition or total organic compound

destruction efficiency shall be prior to the inlet of any

control device and after all recovery devices.

b)

 Reference Methods

2,

2A,

 2C or 2D for determination of the

volumetric flowrate.

c)

 Reference Method

 3 to measure oxygen concentration of the

air dilution correction.

 The emission sample shall be

corrected to

 3 percent oxygen.

d)

 Reference Method 25

(a)

 to determine the concentration of

total organic compounds (minus methane and ethane)

 in the

control device outlet and total organic compound reduction

efficiency of the control device.

TRE DETERMINATION

The following reference methods and procedures are required for

determining the offgas flowrate, hourly emissions, and the net

heating value of the gas combusted to calculate the vent stream

TRE.

a)

 Reference Method

 1 or 1A for selection of the sampling site.

The sampling site for the vent stream flowrate and molar

composition determination prescribed in

(b)

and

(c)

 shall be

prior to the inlet of any combustion device, prior to any

post-reactor dilution of the stream with air and prior to

any post—reactor introduction of halogenated compounds into

the vent stream.

 Subject to the preceding restrictions on

the sampling site,

 it shall be after the final recovery

device.

 If any gas stream other than the air oxidation vent

stream is normally conducted through the recovery system of

the affected facility, such stream shall be rerouted or

turned off while the vent stream is sampled, but shall be

routed normally prior to the measuring of the initial value

of the monitored parameters for determining compliance with

the

recommended

PACT.

the

air

oxidation

vent

stream

normally

routed

through

any

equipment

which

not

part

the

air

oxidation

process

defined

Ill.

Adm.

Code

211.122

211.350

this

Part,

 such equipment shall be

bypassed

the

vent

stream

while

the

vent

stream

sampled, but shall not be bypassed during the measurement of

the

initial

value

 the monitored parameters for

determining compliance with Subpart V.

b)

 The molar composition of the vent stream shall be determined

using the following methods:

Reference

Method

measure

the

concentration

all

organics, including those containing halogens, unless a

significant portion of the compounds of interest are

polymeric

 (high molecular weight), can polymerize

before

analysis

have

low

vapor

pressures,

which

case

Reference

Method

25(a)

shall

used.

2)

 ASTN

D1946—67

(reapproved

1977),

incorporated

reference in Section 215.105

 219.112 of this Part,

to

measure the concentration of carbon monoxide and

hydrogen.

3)

 Reference Method

measure

the

content

water

vapor,

 if necessary.

c)

 The volumetric flowrate shall be determined using Reference

Method

2A,

2D,

appropriate.

The

net

heating

value

the

vent

stream

shall

 calculated

using the following equation:

n

H=K

E

 CiHi

i=1

Where:

H

 Net heating value of the sample, MJ/scm, where the

net

enthalpy

per

mole

offgas

based

combustion

25°C and

760

Hg,

but

the

standard

temperature for determining the volume

corresponding to one mole is 20°C,as in the

definition

(vent

 stream flowrate) below.

 Constant,

 1.740

x

10~ (1/ppm)

(mole/scm)

(MJ/kcal)

where standard temperature for mole/scm is 20°C.

 Concentration

sample

 component

 i, reported on a

wet basis,

 in ppm, as measured by Reference Method

18 or ASTM D1946-67 (reapproved 1977),

incorporated

reference

Section

2-1-5.105

219.112

this

Part.

Net

heat

combustion

sample

component

kcal/mole based on combustion at

25°C and

760

Hg.

 If published values are not available or

cannot

calculated,

the

heats

combustion

vent

stream

components

are

required

determined using ASTM D2382-76, incorporated by

reference in Section 215.105 219.112 of this Part.

e)

 The emission rate of total organic compounds

 in the process

vent

stream

shall

calculated

using

the

following

equation:

n

E=K

CiMi

i=1

Where:

E

 Emission rate of total organic compounds (minus

methane

and

ethane)

the

sample

kg/hr;

 Constant 2.494

10~ (1/ppm)

(mole/scm)

(kg/g)

(min/hr), where standard temperature for

(mole/scm)

20°C;

Molecular

weight

 of sample component

i

 (g/mole);

F

 Vent stream flowrate (scm/mm), at a standard

temperature of 20°C.

f)

 The total vent stream concentration

 (by volume)

 of compounds

containing halogens

 (ppmv, by compound)

 shall

summed

from

the individual concentrations of compounds containing

halogens which were measured by Reference Method

18.

(Source:

Amended

Ill.

Reg.

_______,

effective

_________)

ORDERED.

Dorothy

Gunn,

Clerk

the

Illinois

Pollution

Control

Board, hereby certify~~.atthe above op,jj~ionand order was

adopted

the

day

 ___________________,

 1994,

byavoteof

~O.

~

~

Dorothy N. Gi~, Clerk

Illinois

Pollñtion

Control

Board