Sec. 9.
(a) The
following definitions apply throughout this section:
(1) "Aggregate" means any combination of
sand, gravel, and crushed stone in their natural or processed state.
(2) "Aggregate transfer" means the transfer
of material:
(A) from:
(i) process equipment onto the
ground;
(ii) the ground into
hauling equipment;
(iii) hauling
equipment onto a storage pile; or
(iv) a storage pile into hauling equipment
for transport; or
(B)
into an initial hopper for further process.
(3) "Cement" means a powdered substance
manufactured from calcined carbonate rock (burned lime) and clay that, when
mixed with water, forms a cohesive and adhesive material that will harden into
a rigid mass.
(4) "Concrete" means
a construction material consisting of a coarse and fine aggregate bound by a
paste of cement and water, which then sets into a hard and compact
substance.
(5) "Ready-mix concrete
batch plant" means a facility that prepares and distributes made-to-order
batches of concrete in bulk or package form.
(b) Any ready-mix concrete batch plant with
actual annual emissions of particulate matter (PM) less than twenty-five (25)
tons per year, including fugitive particulate emissions, may elect to be
subject to this section by complying with the requirements of section 1 of this
rule and meeting the following conditions:
(1)
Production shall be limited to three hundred thousand (300,000) cubic yards
annually.
(2) Each source shall
maintain records of annual production at the site on a calendar year
basis.
(3) Fugitive particulate
emissions from cement and aggregate silos shall be controlled by operating dust
collectors, such that visible emissions do not exceed twenty percent (20%)
opacity in twenty-four (24) consecutive readings in a six (6) minute period.
Compliance with this limitation shall be determined by 40 CFR 60, Appendix A,
Method 9*.
(4) Fugitive particulate
emissions shall be controlled by applying water on aggregate storage piles,
unpaved roadways, and aggregate transfer operations on an as needed basis such
that the following visible emission conditions are met:
(A) Visible emissions from storage piles
shall not exceed twenty percent (20%) in twenty-four (24) consecutive readings
in a six (6) minute period. This limitation shall not apply during periods when
application of control measures are ineffective or unreasonable due to
sustained high wind speeds. The opacity shall be determined using 40 CFR 60,
Appendix A, Method 9*, except that the opacity shall be observed at
approximately four (4) feet from the surface at the point of maximum opacity.
The observer shall stand at least fifteen (15) feet, but not more than
one-fourth (1/4) mile, from the plume and at approximately right angles to the
plume.
(B) Visible emissions from
unpaved roads shall not exceed an average instantaneous opacity of twenty
percent (20%). Average instantaneous opacity shall be the average of twelve
(12) instantaneous opacity readings, taken for four (4) vehicle passes,
consisting of three (3) opacity readings for each vehicle pass. The three (3)
opacity readings for each vehicle pass shall be taken as follows:
(i) The first shall be taken at the time of
emission generation.
(ii) The
second shall be taken five (5) seconds after the first.
(iii) The third shall be taken five (5)
seconds after the second or ten (10) seconds after the first.
The three (3) readings shall be taken at approximately four
(4) feet from the surface at the point of maximum opacity. The observer shall
stand at least fifteen (15) feet, but not more than one-fourth (1/4) mile, from
the plume and at approximately right angles to the plume.
(C) Visible emissions from
aggregate transferring operations shall not exceed an average instantaneous
opacity of twenty percent (20%). The average instantaneous opacity shall be the
average of three (3) opacity readings taken five (5) seconds, ten (10) seconds,
and fifteen (15) seconds after the end of one (1) material loading or unloading
operation. The three (3) readings shall be taken at the point of maximum
opacity. The observer shall stand at least fifteen (15) feet, but not more than
one-fourth (1/4) mile, from the plume and at approximately right angles to the
plume.
(5) All
manufacturing equipment that generates particulate emissions and control
devices shall be operated and maintained in such a manner as to meet the
requirements of this rule.
(6)
Cement transferring operations shall always be enclosed.
(7) Each source shall maintain records on the
types of air pollution control devices used at the source and the operation and
maintenance manuals for those devices.
(8) Fugitive particulate emissions at a
ready-mix concrete batch plant shall not escape beyond the property line or
boundaries of the property, right-of-way, or easement on which the source is
located, pursuant to 326 IAC 6-4.
(9) Request a source specific operating
agreement under this section.
*This document is incorporated by reference. Copies may be
obtained from the Government Printing Office, 732 North Capitol Street NW,
Washington, D.C. 20401 or are available for review and copying at the Indiana
Department of Environmental Management, Office of Air Quality, Indiana
Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis,
Indiana 46204.
