06- 096 C.M.R. ch. 161, § 6 - Retention Factors and Capture Efficiencies
A. For purposes of determining VOC emissions
from offset lithographic printing operations, the following retention factors
and capture efficiencies shall be used:
(1) A
portion of the VOCs contained in inks and cleaning solution is retained in the
printed web or in the shop towels used for cleaning. The following retention
factors shall be used:
(a) A one-hundred
percent VOC retention factor for all vegetable ink oils and a twenty percent
VOC retention factor shall be used for all other heatset inks printed on
absorptive substrates, meaning eighty percent of the VOCs in the ink is emitted
during the printing process and is available for capture and control by an
add-on pollution control device.
(b) A one-hundred percent VOC retention
factor for all vegetable ink oils and a ninety-five percent VOC retention
factor shall be used for all other sheet-fed and non-heatset web inks printed
on absorptive substrates, meaning five percent of the VOCs in the ink is
emitted during the printing process.
(c) A fifty percent VOC retention factor
shall be used for cleaning solution VOCs in shop towels for cleaning solutions
with a VOC composite vapor pressure of no more than ten mm Hg at twenty degrees
Celsius (sixty-eight degrees Fahrenheit) if the contaminated shop towels are
kept in closed containers, meaning fifty percent of the VOCs used on the shop
towels is emitted during the cleaning process.
(2) A portion of the VOCs contained in inks,
fountain solutions, and automatic blanket washes on heatset presses is captured
in the press dryer for control by add-on pollution control devices. The
following capture efficiencies are to be used:
(a) A one hundred percent VOC carry over
efficiency shall be used for inks. All the VOCs in the ink that is not retained
is assumed to be volatilized in the press dryer. Capture efficiency testing for
heatset dryers is not required if it is demonstrated that pressure in the dryer
is negative relative to the surrounding press room and the airflow is into the
dryer.
(b) A seventy percent VOC
carry over efficiency shall be used for fountain solutions containing alcohol
substitutes.
(c) A forty percent
VOC carry over efficiency shall to be used for automatic blanket wash solutions
with a VOC composite vapor pressure of no more than ten mm Hg at twenty degrees
Celsius (sixty-eight degrees Fahrenheit).
Notes
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