Document b5vZYOdEZqKLL04BmQKBXn72O
lake Charles VCM Plont VCM Plant Rd., P.O. Bo* 605
CERTIFIED MAIL #399 530 988 RETURN RECEIPT REQUESTED
Westlake, Louisiana 70669 Phone (318) 491-5030
September 12, 1985
Mr. Robert H. Shemwell Clerk United States District Court Western District of Louisiana Shreveport, LA
Re:
United States v. Conoco Inc. Civil Action No. 83-2518
Dear Sir:
Enclosed is a copy of the letter transmitting to the
United Stated Environmental Protection Agency the
information required by the Consent Decree entered in
the subject case.
Submittal of this information
satisfies Section III.A. of the Decree. Please enter
the copy of the letter in the file for this case.
Thank you for your attention to this matter.
Sincerely,
R. A. Conrad Plant Manager Vista VCM Plant
br cc(w/encl.): J. Berry St. John, Jr. Robert Brager F. Henry Habicht, II David A. Titman Courtney M. Price Ken Spears Peter L. de la Cruz
CUH 000006086
Vista Chemical Coimpany
Lake Charles VCM Plont VCM Plont Rd.. P.O. Box 605
CERTIFIED MAIL #399 530 989 RETURN RECEIPT REQUESTED
Westlake, Louisiana 70669 Phone <318)491-5030
September 12, 1985
VISITS
Director, Air & Waste Mgt. Division United States Environmental Protection Agency Region VI 1201 Elm Street Dallas, TX 75270
Dear Sir:
This letter and the attached material is being submitted by Conoco Inc. and Vista Chemical Company in full satisfaction of Section III.A. of the Consent Decree entered with the United States District Court for the Western District of Louisiana on August 19, 1985, in Civil Action No. 83-2518.
All of the pages in this information package which are stamped "confidential" are claimed confidential in their entirety pursuant to the provisions of 40 CFR Part 2. It is our understanding the EPA will protect this information as confidential and will not divulge it to any other party.
The information requested lends itself readily to tabular form? therefore, please note that responses have
been combined in several tables. Information requested in Section III.A.l. is provided in Tables I and II. Table I identifies the number of bypass incidents by their respective nature and cause. Table II classifies each bypass incident "by category, according to the cause of the incident. TV
Information requested in Section III.A.2. (a) of the
Consent Decree is provided in Tables II and III. Table
II identifies each "bypass incident by the date of
occurrence, time duration, ... and the applicable
category ..., which properly describes the nature and
cause of the bypass."
Tables II and III together
identify each "bypass incident by... description of the
category of affected equipment from which exhaust
gas(es) were released uncontrolled." Note that Table
III does not include any affected equipment which would
not be expected to be vented during normal everyday
operation. For example, equipment that is vented in
CUM 000006087
Page 2
preparation production equipment.
for a plant is halted is
turnaround during which not listed as affected
Information requested in Section III.A.2 in Drawings VCM-1,2, and 3 as well as descriptions accompanying these drawings
(b) is provided in the written
Sincerely,
R. A. Conrad Plant Manager Vista VCM Plant
br cc (w/o end ) :
R. M. McQuade
Office of the Clerk United States District Court Western District of Louisiana
cc(w/encl.):
J. Berry St. John, Jr. Robert Brager F. Henry Habicht, II David A. Titman Courtney M. Price Ken Spears Peter L. de la Cruz
bcc(w/encl. ) : RTF, RAC, WPS, SCR, MWC, JCL, WLM, TGG, GEH
bcc(w/encl.): ESW, JHN, GJF
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CONFIDENTIAL
TABLE I
Incinerator Bypass Nature and Cause Summary for the Period From
May 1, 1983 through March 13, 1985
Total Number of Bypasses Per Category
Automatic Shutdown
Nature and Cause Category
Partial Bypass
Flame Failure
l.ow Combustion
Air Flow
Other
I. Excessive Vent Flow from Main Plant
A. Routine Vents 1. Vinyl Product Caustic Dryer (1) 2. Vinyl Vent Recovery Unit (2) 3. Oxychlorination Purge Gas Dryer (3) 4. Flake Caustic Dryer (4) 5. Caustic Melt Blowdown Drum (5) 6. EDC-Caustic Decanter T-102 (6) 7. Direct Chlorination Reactor Startup (7) 8. Miscellaneous Equipment Clearing for Maintenance (8) 9. Main Plant Startup and Inventory (9)
1 3 1 1
1 1 2 2
11
1 1
4 13 1
CUH 0 0 0 0 0 6 0 8 9
B. Non-routine or Emergency Vents 1. Light Ends Storage Tank (10) 2. Vinyl Column (11) 3. Direct Chlorination Reactor a. Impurities in Reactor Feedstock (12) 1) Ethylene 2) Chlorine 4. HC1 Column (24)
1 53
43 5 1
2
C. Unknown Source
33
(All footnotes appear on pages following this table).
0 6 0 9 0 0 0 0 0 Hf13
Nature and Cause Category II. Instrument Malfunction
A. Combustion Air Control (13) B. 'Instrument Panel Power Supply (14) C. Combustion Air Automatic Shutoff (15) D. Flame Arrestor Level Control (16) E. Flame Scanner (17) F. Valve Positioner (18) C. HC1 Absorber Quench Vapor Inlet Temperature (19) III. Mechanical Malfunction A. Incinerator Burner B. Tank Farm Vent Blower C. Incinerator Firebox IV. Steam Outage V. Electrical Power Outage VI. Liquid Byproduct Feed Interruption VII. Operator Inattention (All footnotes appear on the pages following this table).
CONFIDENTIAL
CONFIDENTIAL
______ Total Number of Bypasses Per Category
Automatic Shutdown
Partial Bypass
Flame Failure
Low Combustion
Air Flow
Other
4 4 (20)
2 (21) 1
_1
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( A ll fo o tn o te s appear on the pages fo llo w in g th is ta b le ).
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CONFIDENTIAL
Notes for Table I
(1) The vinyl product caustic dryer is used to remove moisture from product being transferred from storage to railcars or ship.
(2) The vinyl vent recovery unit recovers vinyl product from railcar and ship vents by condensing vinyl vapors. Once condensed, vinyl is recovered and the remainder of the vent stream is incinerated.
(3) The oxychlorination purge gas dryer removes moisture from the oxychlorination purge stream before the stream enters the direct chlorination reactor.
(4) The flake caustic dryer is used to remove moisture from vinyl product being transferred from the processing unit to storage.
(5) Caustic melt from the flake caustic dryers is routinely transferred to the caustic melt blowdown drum where entrained and/or dissolved vinyl is vaporized and vented to the incinerator.
(6) Crude ethylene dichloride is washed with caustic and then phase separated in EDC-Caustic Decanter T-102.
(7) Ethylene dichloride is produced by direct chlorination of ethylene in the Direct Chlorination Reactor.
(8) During turnarounds and maintenance shutdowns equipment is cleared with steam and nitrogen prior to opening for entry.
(9) During main plant startup equipment is purged of all oxygen and then inventoried.
(10)
Pressure in the Light Ends Storage Tank is normally automatically controlled by venting excess pressure to the incinerators. Failure of the automatic controller and subsequent overpressure of the tank necessitated emergency venting to the incinerator.
(11)
The bottoms of the HC1 Column are fed to the Vinyl Column where vinyl chloride product and recycled ethy lene dichloride are separated. Occasionally the HC1 column goes "sour11 which results in HCl vapors in the top of the Vinyl Column, necessitating emergency venting of the Vinyl Column condensers to the incinerator.
1
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CONFIDENTIAL
(12) Impurities in the Direct Chlorination Reactor feedstock and/or operational upsets of the feedstock supplier result in abnormally high vent rates.
(13) Incinerator combustion air control is used to maintain sufficient excess oxygen to ensure complete combustion.
(14) The incinerator instrument panel power supply provides regulated power to all control and indication instrumentation.
(15) When an automatic incinerator shutdown occurs a safety shutoff valve on the combustion air automatically closes, preventing addition of air to the firebox.
(16)
Liquid seal flame arrestors are used to prevent flash back from the incinerator firebox into the exhaust gas headers.
(17) Incinerator firebox flame scanners are used to detect the firebox flame.
(18) Valve positioners are used on the exhaust gas header pressure control valves to ensure correct valve position for a given controller output signal.
(19) HCl absorber quench vapor inlet temperature is monitored and will initiate an automatic incinerator shutdown if safe operating temperature is exceeded.
(20) Mechanical malfunction of the tank farm vent blower results in bypassing of the tank farm vent only, not the direct chlorination and wet vent headers.
(21)
The incinerator did not shutdown because power was interrupted for less than 3 seconds. However power the tank farm vent blower and to the main plant was interrupted on 2-7-84 and 6-1-84 causing partial bypasses.
to
(22)
Incinerator combustion air is supplied by forced draft blowers driven by either steam turbine or electric motor. Turbine tripouts were caused by low lube oil pressure resulting from plugged filter elements.
(23)
The exact cause of the incinerator bypass that occurred on 12-31-84 at 0430 is unknown. Prior to its occur rence the vent header.pressure decreased followed by a flame failure indication.
2
000006093 CUH
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CONFIDENTIAL
(24)
A mixture of HC1, vinyl chloride, and ethylene dichloride is fed to the HC1 Column where the HC1 separated from the vinyl chloride and ethylene dichloride.
is
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CONFIDENTIAL
Date
Time(3)
05-13-83 05-14-83 05-15-83 05-21-83 05- 25-83 06- 06-83 06-10-83 06-10-83 06-18-83 06-21-83 06- 22-83 07- 08-83 08- 01-83 08-04-83 08-10-83 08-24-83 08- 28-83 09- 02-83 10- 13-83 11- 01-83 11-05-83 11-14-83 11-15-83 11- 30-83 12- 15-83 12-21-83 12-23-83 12-23-83 12-25-83 01-12-84 01-26-84 01-27-84 01- 30-84 02- 05-84 02-05-84 02-06-84 02-07-84
02-09-84
0900-0945 2200-2204 0010-0015 1645-1650 0700-0730 1800-1820 1000-1005 1555-1600 1100 1400 (2) 2030-2200 0100-1000(2) 2045-2130 1015-1030 1700-1715 1400-1415 0430-0440 1530-1540 1715-1717(1) 2230-2235 1100-1105 1545-1625 0800-0805 0145-0215 0415-0425 0400-0410 0535-0550 0630-0730 1300-1530 2000-2005 1030-1032 1820-1830 1000-1002 0900-1115 20100100 1630-1705 (1,2) 1900-1905
Table II
Incinerator Bypasses Reported During the Period from May 1, 1983 through March 13, 1985
Nature & Cause Category
Partial Bypass
Automatic Shutdovn_______
Low
Flame
Combustion
Failure
Air Flow
Other
Vent Header(s) ______Bypassed
Wet
Dry
Tank Farm
I.A.8. I. B.3.a.2) I. B. 3. a . 2) I.C. I.A.8. I.B.3.a.2) I. B . 3. a. 2) I.A.8
X X X
X
X XXX XXX X XX
XX X
X XXV X XXX
III.B.
X
X
I.A.4.
X XXX
III.B.
X
X
I.A.8.
X XXX
III.A.
X
XXX
I.A.5.
X XXX
I. B. 3.a.2)
X XXX
I.B.2.
X XXX
I.A.2.
X XXX
I.B.3.a.1)
X
X
I.A.7.
X
XXX
II.A.
X XXX
I. B. 3. a. 1)
X
XXX
II. B.
X XXX
I.B.2.
X
XX
II. C.
X XXX
VIII.A.
X XXX
VIII.A.
X XXX
II.D.
X XXX
IV. X X X X
I.B.2.
X
XXX
I.C.
X
XXX
I.C.
X
XXX
I.A.1.
X
X
V. X X X X
III.A. V.
X
X XXX X
I.A.9.
X
XX
(All foo tnotes appear on last page of this table).
00000609^ cutt
CONFIDENT!/
Date
02-10-84
02-11-84 02-13-84 02-13-84 02-14-84 02-14-84 02-17-84 02-19-84 02-22-84 03-08-84 03-09-84 03-30-84 04-02-84 04-05-84 04-06-84
04-07-84 04-11-84 04-22-84 04-25-84 05-07-84 05-11-84 05-11-84 05-28-84 05-30-84 05-31-84
06-01-84 06-01-84 06-20-84 06-27-84 06-28-84 06-28-84 06-28-84 07-06-84 07-19-84 07-19-84 07-20-84 07-22-84 09-04-84 09-05-84 09-10-84
09-20-84 09-21-84
Time(3)
0815-0940 (5 mins.) 1251-1545 0225-0300 2315-2325 0740-1215 1747-1811 0040-0043 0030-0128 1730-1732 1830-1832 1600-1610 1110-1115 2200-2202 1030-1045 1430-2232 (23 mins.) 1410-1415 1905-1912 0300-0302 1430-1455 20001515(2) 0720-0745 0750-0754 0820-0821 0930-1053 (5 mins.) 1310-1311 1845-1925 1250-1300 1650-1700 1200-1215 1630-1650 1845-1925 1000-1058 1530-1622 1625-1630 0200-0205(1) 1350-1400(1) 0415-0730(2) 1210-1255 1100 (5 secs.) 1300-1301 1630-1645
Nature & Cause Category
I.C.
I.B.4. I.B.2. IV. III.C. I. B. 3. a. 1) I.A.8. I.B.2. I.A.2. I.C. I.A.8. I.B.2. I.B. 1. I.A.9. III.A
III.A. I.A.8. I.B.3.a.2) I.B.3.a.2)
III.B. I.B.3.a. 1) II. F. I.A.3. V.
V. I.B.2. I.C. II.E. I.B.2. I.B.2. I.B.2. I.A.2. I.A.8. I.A.8. I.A.8. I.A.9. III.B. VI. I.A.2.
I.A.4. III.A.
Partial Bypass
Automatic Shutdown_______
Low
Flame
Combustion
Failure
Air Flow
Other
Vent Header(s) ______Bypassed
Wet
Dry
Tank Farm
XX
X X
X X
X X X
X X X X X
XXX XX X X XXX X XXX X X v; XX XXX
X X XXX XXX XXX X XXX
X XX XX XX XX
X X
>:
V
X XXX
V T.-
x X XxX
X X
X
V
X X X
X X X X X X X
XXX XXX XXX XXX X XXX XXX XXX
X XX X XXX XXX XXX
X XXX XX
X XX X X yi X
(All footnotes appear on the last page of this table).
. 0<?fr
Date
09-28-84
x-w-L L--c4 10-25-84 12-03-84
1 2-12-84 12-13-84 12-14-84 12-24-84 12-31-84 01-21-85
Time(3)
1550
' i
1510-I52G i535-1546 1455 (5 secs.)(1) 0905-0912 0250-0340 0115-0135 0735-0736 0430-0440 1800-1802
Nature & Cause Category
CONFIDENTIAL CONFIDENTS
Partial Bvpass
Automatic Shutdovn_______
Low
Flame
Combustion
Failure
Air Flow
Other
Vent Header(s) ______ Bypassed
Wet
Dry
Tank Farm
VII.
;;
I. A. 2 . II. A. I.A.6.
x X XX
x
II. C. I. B. 3. a . 1) I. B. 3. a. 1) II.D. VIII.B. I.B.3.a. 1.)
X
X
X
X X
X XX X X XXX XXV XXX
Notes:
(1) Three hour time-we ighted average is estimated to be less than 10 ppm.
(2) Only the Tank Farm Vent bypassed the incinerator; therefore, the magnitude of the vent flow and vinyl chloride concentration were small. See Bypass Mechanism for the Tank Farm Vent attached.
(3) When the bypass spanned two or more consecutive days, the starting date and time are given on the first line and the ending date and time on the next. When the bypass was intermittent, the time period over which the bypass occurred is given followed by the total time during which the incinerator was actually bypassed in parenthesis, i.e., 1815-0940 (5 min.). When the duration of the bypass was less than 1 minute, only the starting time is given followed by the duration in parenthesis, i.e., 1455 (5 secs.).
CUM 000006097 3
C0NFIDENT1A
CONFIDENTIAL
Table III
Vent. Header Affected Equipment Sources
Wet Vent Header
A. Continuous Sources
1. Light Ends Column Overhead Accumulator (S-102) - collects overhead product from the Light Ends Column
2. EDC-Caustic Decanter (T-102) - crude ethylene dichloride (EDC) and caustic are phase sepa rated in this vessel
3. EDC-Acid Decanter (T-103A) - crude EDC and acid are phase separated in this vessel
4. Steam Stripper Aqueous Holding Tank (T-110) contains feed for the Steam Stripper
5. Tank Farm Vent System - collects vents from storage tanks
6. Light Ends Storage Tank (T-402) - stores overhead product from the Light Ends Column
7. Natural Gas Dryers (S-149 A/B) - remove moisture from natural gas entering the Direct Chlorination Reactor
8. CPS Collection Drum (T-512) - receives and phase separates (organic and aqueous phases) liquid from the CPS Underground Collection Drum (T-514)
9. CPS Underground Collection Drum (T-514) collects and adjusts the pH of drains from the Closed Process Sewer (CPS) system
B. Intermittent Sources
1. Flake Caustic Dryers (S-2G7 A/B) - remove moisture from product being transferred to storage
2. Vinyl Column Condensers (H-207 A/B) - condense overhead product from the Vinyl Column
CWH 00000A098
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u CONFIDENTIAL
3. Vinyl Product Caustic Dryer (S-401) - removes moisture from product being transferred from storage to railcar or ship
4. Oxychlorination Purge Gas Dryers (S-322 A/B) remove moisture from oxychlorination purge gas before the gas enters the Direct Chlorination Reactor
5. Caustic Melt Blowdown Drum (S-108) - collects caustic melt from the Flake Caustic Dryers
II. Dry (or Direct Chlorination) Vent Header
A. Continuous Sources
1. Direct Chlorination Reactor Crude EDC Tank (T-101) - receives crude EDC product from the Direct Chlorination Reactor
2. Heavy Ends Column Overhead Accumulator (S-103) - collects overhead product from the Heavy Ends Column
3. EDC Tar Still Column (C-104) - distillation column for removing EDC from heavy ends byproduct
4. VCM Tar Still Column (C-204) - distillation column for removing EDC from heavy ends byproduct
5. MeCl Unit CO^ Stripper (W-112) - Removes CO^ and other noncondensables from MeCl product
6. MeCl Chiller (X-7) - Recovers MeCl product from the desuperheater vent
B. Intermittent Source
1. Vinyl Vent Recovery Unit - recovers vinyl from railcar and ship vents during loading
III. Tank Farm Vent Header
A. Continuous Sources
1. Tars Storage.Tanks (T-405 & T-452) - store heavy ends byproduct oO'?9 0 Q00 2
nONFIDEN
A' ML
CONFIDENTIAL
2. Slops Tank (T-460) - stores off-specification intermediate products
3. Pure EDC Storage Tank (T-451) - stores pure ethylene dichloride product
4. Dry Crude EDC Storage Tank (T-450) - stores crude EDC from the Direct Chlorination Reactor Crude EDC Tank and/or recycle EDC from the bottom of the Vinyl Column
5. Wet EDC Storage Tank (T-453) - stores wet EDC from the Wash System
Cl-jf-j 000061oo 3
CONFIDENTIAL CONFIDENTIAL
Bypass Mechanism for the
Direct Chlorination and Wet Vents
Overview of the Bypass Mechanism
See Drawing VCM-1
The Direct Chlorination or Dry (DC) Vents and the Wet Vents normally flow from the main plant through individual liquid knockout pots to the vent gas incinerator. However, under certain conditions a portion or all of either the wet or DC vents can bypass the incinerators and flow to the atmosphere via the Vent Scrubber. Gases bypassing the incinerator first pass through a pressure control valve (PCV) which is located in each header's bypass line to the Vent Scrubber. These pressure control valves can only be opened by certain controllers under specific conditions, all of which will be discussed in more detail in the following section.
Detail Description of the Bypass Mechanism
See Drawing VCM-2
Under upset conditions the Direct Chlorination or Dry (DC) Vents and Wet Vents bypass the incinerator by flowing through the Vent Scrubber, C-500, to the vent stack and subsequently the atmosphere via vent header pressure control valves PCV-901 and PCV-902, respectively. (See Drawing VCM-2 for further details). A bypass of the vent incinerators is classified as either a partial or a total bypass. A partial bypass of the DC and/or Wet Vent occurs when PCV-901 and/or PCV-902, respectively, are opened by one of several controllers and the incinerator stays on-line. A total bypass of the DC Vents and Wet Vents occurs when PCV-901 and PCV-902 open after the on-line incinerator shuts down. The burner management system of each incinerator contains interlocks which can automatically shut down the incinerator. The conditions which activate an incinerator shutdown are:
1) High incinerator firebox temperature.
2) Low steam drum level.
3) High HCl absorber temperature.
4) Low primary combustion air flow rate.
0ooo6 Cviv\
VCM Recovery System Vent
\ ,<
Dry Vents________
Dry Vent KO Pot
Tank Farm Vent
Wot Vents
Wet Vent KO Pot
Incinerators
Incinerator Vent Stack
1*> 0 0 0 0
O c
-i.
Vent Scrubber
O 500
CONFIDENTIAL
Di-uwi.-jb VCM-I
SlMPLlFIED__DlAGK.AM .pf.. WtJ AND DC VENT I Ieaulu Bypass System
Main Plant Vent Stack
I I
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CONFIDENTIAL CONFIDENTIAL
5) Low standby air flow rate. 6) Loss of flame. 7) Mechanical failure of the flame scanners.
8) Power failure of more than 3 seconds.
Whenever an incinerator automatically shuts down, the DC Vent and Wet Vent safety shutoff valves {SSOV-905A and SSOV-906A for the primary incinerator train and SSOV-905B and SSOV-906B for the standby incinerator train) close automatically. These valves are located directly upstream of the incinerator trains Liquid Seal Flame Arrestor, S-911A for the primary train and S-911B for the standby train. Ir. addition the safety shutoff valve on the line for the combined vent to each incinerator from the flame arrestors, SSOV-916A for S-911A and SSOV-916B for S-911B, close as part of the shutdown action. Closing the safety shutoff valves stops the flow of exhaust gas to the inoperative incinerator, and causes the pressure to increase in the vent headers. A bypass does not occur unless the pressure in the header(s) become(s) high enough for PRC-901 and/or PRC-902 to open their respective pressure control valves (PCV-901 and PCV-902).
There are two other items that can automatically close the safety shutoff valves; these are a low low level indication of the seal liquid on the flame arrestor and a high tempera ture in the flame arrestor. A total bypass will occur if the safety shutoff valves are closed for a sufficient length of time. One point to note is that an automatic incinerator shutdown does not necessarily take place due to either of these two items happening.
Each pressure control valve, PCV-901 and automatically opened by one dedicated or trollers. The six controllers and their listed below:
PCV-902, can be four shared con functions are
1) PRC-901 - DC Vent Header Pressure Controller
This controller is dedicated to PCV-901. the pressure of the DC Vent Header.
It controls
2) PRC-902 - Wet Vent Header Pressure Controller
This controller is dedicated to PCV-902. the pressure of the Wet Vent Header.
It controls
CUH 00006l04 2
CONFIDENTIAL CONFIDENTIAL
3) TIC-906A - Primary Incinerator Firebox High Temperature Controller
This controller will open both PCV-901 and PCV-902 when the temperature in the Primary Incinerator Firebox exceeds the set point.
4) TIC-906B - Standby Incinerator Firebox High Temperature Controller
This controller will open both PCV-901 and PCV-902 when the temperature in the Standby Incinerator Firebox exceeds the set point.
5) PIC-982C - Primary Incinerator HCl Absorber Pressure Controller
This controller will open both PCV-901 and PCV-902 when the pressure in the Primary HCl Absorber exceeds the set point. The controller will function only when selected for control by Hand Switch, HS-982.
6) PIC-982D - Standby Incinerator HCl Absorber Pressure Controller
This controller will open both PCV-901 and PCV-902 when the pressure in the Standby HCl Absorber exceeds the set point. The controller will function only when selected for control by Hand Switch, HS-982.
Bypass Mechanism for the Tank Farm Vent
See Drawing VCM-2 and VCM-3
The Tank Farm Vent is bypassed around the incinerator through the Vent Scrubber, C-500, to the vent stack and subsequently the atmosphere whenever the Wet Vent header is bypassed (See Dwg. VCM-1 & 2). In addition the Tank Farm Vent will also bypass the incinerator when the operating Tank Farm Vent Blower fails. When both blowers are down the Tank Farm Vent gas is bypassed to the atmosphere through pressure safety valve PSV-533 located on top of the Tank Farm Vent Knock-out Pot, S-412 (See Dwg. VCM-3).
CUH 000006105
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CONFIDENTIAL CONFIDENTIAL
Legend for Drawings VCM-1, 2, & 3
NO NC RD " -- DC
Normally Open Normally Closed Rupture Disc Bypass Lines to C-500 Direct Chlorination or
Dry
Vent
Instrumentation and Valve Identifications:
HS ICV IRC IT PCV PIC PRC PSV PT PY SSOV TIC
Hand Switch Current Control Valve Current Recording Controiler Current Transmitter Pressure Control Valve Pressure Indicating Controller Pressure Recording Controller Pressure Safety Valve Pressure Transmitter
Signal Selector Safety Shutoff Valve Temperature Indicating Controller
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