(a) In the Beaumont-Port Arthur, Bexar County, Dallas-Fort
Worth, El Paso, and Houston-Galveston-Brazoria areas as defined in §115.10
of this title (relating to Definitions) and in Gregg, Nueces, Victoria,
Comal, Guadalupe, Wilson, Bastrop, Caldwell, Hays, Travis, and Williamson
Counties, the following control requirements shall apply.
(1) Cold solvent cleaning. No person shall own or operate
a system utilizing a volatile organic compound (VOC) for the cold
solvent cleaning of objects without the following controls.
(A) A cover shall be provided for each cleaner which
shall be kept closed whenever parts are not being handled in the cleaner.
The cover shall be designed for easy one-handed operation if any of
the following exists:
(i) the true vapor pressure of the solvent is greater
than 0.3 psia (2 kPa) as measured at 100 degrees Fahrenheit (38 degrees
Celsius);
(ii) the solvent is agitated; or
(iii) the solvent is heated.
(B) An internal cleaned-parts drainage facility, for
enclosed draining under a cover, shall be provided for all cold solvent
cleaners.
(C) A permanent label summarizing the operating requirements
in subparagraph (F) of this paragraph shall be attached to the cleaner
in a conspicuous location near the operator.
(D) If a solvent spray is used, it must be a solid
fluid stream (not a fine, atomized, or shower-type spray) and at an
operating pressure of ten psig or less as necessary to prevent splashing
above the acceptable freeboard.
(E) The system shall be equipped with a freeboard that
provides a ratio equal to or greater than 0.7, or a water cover (solvent
must be insoluble in and heavier than water). To determine the freeboard
ratio, the freeboard height measurement is taken from the top of the
degreaser to the top of the air/solvent level. This number is then
divided by the smallest width measurement. The width measurement is
taken at the smallest interior dimension. This dimension could be
located at any point, from the top or opening of the unit to the air/solvent
level.
(F) The operating procedures shall be as follows.
(i) Waste solvent shall not be disposed of or transferred
to another party such that the waste solvent can evaporate into the
atmosphere. Waste solvents shall be stored only in covered containers.
(ii) The degreaser cover shall be kept closed whenever
parts are not being handled in the cleaner.
(iii) Parts shall be drained for at least 15 seconds
or until dripping ceases.
(iv) Porous or absorbent materials, such as cloth,
leather, wood, or rope, shall not be degreased.
(2) Open-top vapor degreasing. No person shall own
or operate a system utilizing a VOC for the open-top vapor degreasing
of objects without the following controls:
(A) a cover that can be opened and closed easily without
disturbing the vapor zone;
(B) the following devices which will automatically
shut off the sump heat:
(i) a condenser coolant flow sensor and thermostat
which will detect if the condenser coolant is not circulating or if
the condenser coolant temperature exceeds the solvent manufacturer's
recommendations;
(ii) a solvent level sensor which will detect if the
solvent level drops below acceptable design limits; and
(iii) a vapor level sensor which will detect if the
vapor level rises above acceptable design limits;
(C) a spray safety switch which will shut off the spray
pump to prevent spraying above the vapor level;
(D) one of the following controls:
(i) a freeboard that provides a ratio equal to or greater
than 0.75 and, if the degreaser opening is greater than 10 ft2 (1m2), a powered
cover. To determine the freeboard ratio, the freeboard height measurement
is taken from the top of the degreaser to the top of the air/vapor
level. This number is then divided by the smallest width measurement.
The width measurement is taken at the smallest interior dimension.
This dimension could be located at any point, from the top or opening
of the unit to the air/vapor level;
(ii) a properly sized refrigerated chiller capable
of achieving 85% or greater control of VOC emissions;
(iii) an enclosed design where the cover or door opens
only when the dry part is actually entering or exiting the degreaser;
or
(iv) a carbon adsorption system with ventilation equal
to or greater than 50 cfm/ft2 (15m 3 /min per m2 )
of air/vapor area (with the cover open) and exhausting less than 25
ppm of solvent by volume averaged over one complete adsorption cycle;
(E) a permanent, conspicuous, label summarizing the
operating procedures listed in subparagraph (F) of this paragraph;
and
(F) the following operating procedures:
(i) the cover shall be closed at all times except when
processing work loads through the degreaser;
(ii) parts shall be positioned so that complete drainage
is obtained;
(iii) parts shall be moved in and out of the degreaser
at less than 11 ft/min (3.3 m/min);
(iv) the work load shall be retained in the vapor zone
at least 30 seconds or until condensation ceases;
(v) any pools of solvent on the cleaned parts shall
be removed by tipping the part before withdrawing it from the vapor
zone;
(vi) parts shall be allowed to dry within the degreaser
freeboard area for at least 15 seconds or until visually dry;
(vii) porous or absorbent materials, such as cloth,
leather, wood, or rope, shall not be degreased;
(viii) work loads shall not occupy more than half of
the degreaser open top surface area;
(ix) solvent shall not be sprayed above the vapor level;
(x) solvent leaks shall be repaired immediately, or
the degreaser shall be shut down until repairs are made;
(xi) waste solvent shall not be disposed of or transferred
to another party such that the waste solvent will evaporate into the
atmosphere. Waste solvent shall be stored only in covered containers;
(xii) exhaust ventilation for systems other than those
which vent to a major control device shall not exceed 65 cfm per ft
2 (20 m3 /min per m2 )
of degreaser open area, unless necessary to meet Occupational Safety
and Health Administration (OSHA) requirements or unless a carbon adsorption
system is installed as a major control device. Ventilation fans or
other sources of air agitation shall not be used near the degreaser
opening; and
(xiii) water shall not be visibly detectable in the
solvent exiting the water separator.
(3) Conveyorized degreasing. No person shall own or
operate a system utilizing a VOC for the conveyorized cleaning of
objects without the following controls:
(A) one of the following major control devices:
(i) a properly sized refrigerated chiller capable of
achieving 85% or greater control of VOC emissions; or
(ii) a carbon adsorption system with ventilation equal
to or greater than 50 cfm/ft2 (15 m 3 /min/m2 )
of air/vapor area (when downtime covers are open) and exhausting less
than 25 ppm of solvent by volume averaged over one complete adsorption
cycle;
(B) a drying tunnel or other means, such as rotating
(tumbling) basket if space is available, to prevent solvent liquid
or vapor carry-out;
(C) a condenser flow switch and thermostat which will
shut off sump heat if the condenser coolant is not circulating or
if the condenser coolant discharge temperature exceeds the solvent
manufacturer's recommendation;
(D) a spray safety switch which will shut off the spray
pump if the vapor level drops more than four inches (ten cm);
(E) a vapor level control thermostat which will shut
off the sump heat when the vapor level rises above the designed operating
level;
(F) entrances and exits which silhouette work loads
so that the average clearance (between parts and edge of the degreaser
opening) is either less than four inches (ten cm) or less than 10%
of the width of the opening;
(G) downtime covers which close off the entrance and
exit during nonoperating hours;
(H) a permanent, conspicuous label near the operator
summarizing the operating requirements in subparagraph (I) of this
paragraph; and
(I) the following operating procedures:
(i) exhaust ventilation for systems other than those
which vent to a major control device shall not exceed 65 cfm/ft2 (20 m3 /min/m2 ) of degreaser opening, unless necessary to
meet OSHA requirements or unless a carbon adsorption system is installed
as a major control device. Ventilation fans shall not be used near
the degreaser opening;
Cont'd... |