| For . . .
| at . . .
| you must . . .
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| 1. the sum of all viscose process vents | a. each existing cellulose food casing operation | i. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 25% based on a 6-month rolling average;
ii. for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| | b. each new cellulose food casing operation | i. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 75% based on a 6-month rolling average;
ii. for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| | c. each existing rayon operation | i. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 35% within 3 years after the effective date based on a 6-month rolling average; for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and comply with the work practice standard for closed-vent systems; and
ii. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 40% within 8 years after the effective date based on a 6-month rolling average; for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and comply with the work practice standard for closed-vent systems.
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| | d. each new rayon operation | i. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 75% based on a 6-month rolling average;
ii. for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| | e. each existing or new cellulosic sponge operation | i. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 75% based on a 6-month rolling average;
ii. for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| | f. each existing or new cellophane operation | i. reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 75% based on a 6-month rolling average;
ii. for each vent stream that you control using a control device (except for retractable hoods over sulfuric acid baths at a cellophane operation), route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems (except for retractable hoods over sulfuric acid baths at a cellophane operation).
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| 2. the sum of all solvent coating process vents | a. each existing or new cellophane operation | i. reduce uncontrolled toluene emissions by at least 95% based on a 6-month rolling average;
ii. for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| 3. the sum of all cellulose ether process vents | a. each existing or new cellulose ether operation | i. reduce total uncontrolled organic HAP emissions by at least 99%;
ii. for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| 4. closed-loop systems | each existing or new cellulose ether operation | comply by operating the closed-loop system.
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| 5. each carbon disulfide unloading and storage operation | a. each existing or new viscose process affected source | i. reduce uncontrolled carbon disulfide emissions by at least 83% from unloading and storage operations based on a 6-month rolling average if you use an alternative control technique not listed in this table source for carbon disulfide unloading and storage operations; if using a control device to reduce emissions, route emissions through a closed-vent system to the control device; and comply with the work practice standard for closed-vent systems;
ii. reduce uncontrolled carbon disulfide emissions by at least 0.14% from viscose process vents based on a 6-month rolling average; for each vent stream that you control using a control device, route the vent stream through a closed-vent system to the control device; and comply with the work practice standard for closed-vent systems;
iii. install a nitrogen unloading and storage system (as defined in § 63.5610); or
iv. install a nitrogen unloading system (as defined in § 63.5610); reduce uncontrolled carbon disulfide emissions by at least 0.045% from viscose process vents based on a 6-month rolling average; for each vent stream that you control, route the vent stream through a closed-vent to the control device; and comply with the work practice standard for closed-vent systems.
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| 6. each toluene storage vessel | a. each existing or new cellophane operation | i. reduce uncontrolled toluene emissions by at least 95% based on a 6-month rolling average;
ii. if using a control device to reduce emissions, route the emissions through a closed-vent system to the control device; and
iii. comply with the work practice standard for closed-vent systems.
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| 7. equipment leaks | a. each existing or new cellulose ether operation | i. comply with the applicable equipment leak standards of §§ 63.162 through 63.179, except that references to “process unit” mean “cellulose ether process unit” for the purposes of this subpart; or
ii. comply with the applicable equipment leak standards of §§ 63.1021 through 63.1037, except that references to “process unit” mean “cellulose ether process unit” for the purposes of this subpart.
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| 8. all sources of wastewater emissions | each existing or new cellulose ether operation | comply with the applicable wastewater provisions of §§ 63.105 and 63.132 through 63.140.
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| 9. liquid streams in open systems | each existing or new cellulose ether operation | comply with the applicable provisions or § 63.149, except that references to “chemical manufacturing process unit” ether means “cellulose ether process unit” for the purposes of this subpart.
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| 10. closed-vent system used to route emissions to a control device | each existing or new affected source (except for retractable hoods over sulfuric acid baths at a cellophane operation) | conduct annual inspections, repair leaks, and maintain records as specified in § 63.148.
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| 11. closed-vent system containing a bypass line that could divert a vent stream away from a control device, except for equipment needed for safety purposes (described in § 63.148(f)(3) | a. each existing or new affected source (except for retractable hoods over sulfuric acid baths at a cellophane operation) | (i) install, calibrate, maintain, and operate a flow indicator as specified in § 63.148(f)(1); or
(ii) secure the bypass line valve in the closed position with a car-seal or lock-and-key type configuration and inspect the seal or closure mechanism at least once per month as specified in § 63.148(f)(2)).
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| 12. heat exchanger system that cools process equipment or materials in the process unit | each existing or new affected source | monitor and repair the heat exchanger system according to § 63.104(a) through (e), except that references to “chemical manufacturing process unit” mean “cellulose food casing, rayon, cellulosic sponge, cellophane, or cellulose ether process unit” for the purposes of this subpart. |