C. Each owner of an MSW landfill having a
design capacity greater than or equal to (i) 1.0 million megagrams and 1.0
million cubic meters in the Northern Virginia Volatile Organic Compound
Emissions Control Area or (ii) 2.5 million megagrams and 2.5 million cubic
meters in the remaining areas of the Commonwealth shall either install a
collection and control system as provided in subdivision C 2 of this section or
calculate an initial NMOC emission rate for the landfill using the procedures
specified in
9VAC5-40-5860. The NMOC emission
rate shall be recalculated annually, except as provided in
9VAC5-40-5880 D 1 b.
1. If the calculated NMOC emission rate is
less than (i) 23 megagrams per year in the Northern Virginia Volatile Organic
Compound Emissions Control Area or (ii) 50 megagrams per year in the remaining
areas of the Commonwealth, the owner shall:
a.
Submit an annual emission report to the board, except as provided for in
9VAC5-40-5880 D 1 b; and
b. Recalculate the NMOC emission rate
annually using the procedures specified in
9VAC5-40-5860 B 1 until such time
as the calculated NMOC emission rate is greater than or equal to (i) 23
megagrams per year in the Northern Virginia Volatile Organic Compound Emissions
Control Area or (ii) 50 megagrams per year in the remaining areas of the
Commonwealth, or the landfill is closed.
(1)
If the NMOC emission rate, upon initial calculation or annual recalculation
required in subdivision C 1 b of this section, is greater than or equal to (i)
23 megagrams per year in the Northern Virginia Volatile Organic Compound
Emissions Control Area or (ii) 50 megagrams per year in the remaining areas of
the Commonwealth, the owner shall install a collection and control system in
compliance with subdivision C 2 of this section.
(2) If the landfill is permanently closed, a
closure notification shall be submitted to the board as provided for in
9VAC5-40-5880 F.
2. If the calculated
NMOC emission rate is greater than or equal to (i) 23 megagrams per year in the
Northern Virginia Volatile Organic Compound Emissions Control Area or (ii) 50
megagrams per year in the remaining areas of the Commonwealth, the owner shall:
a. Submit a collection and control system
design plan prepared by a professional engineer to the board within one year:
(1) The collection and control system as
described in the plan shall meet the design requirements of subdivision C 2 b
of this section.
(2) The collection
and control system design plan shall include any alternatives to the
operational standards, test methods, procedures, compliance measures,
monitoring, recordkeeping or reporting provisions of
9VAC5-40-5822,
9VAC5-40-5850,
9VAC5-40-5860,
9VAC5-40-5870,
9VAC5-40-5880, and
9VAC5-40-5890 proposed by the
owner.
(3) The collection and
control system design plan shall either conform with specifications for active
collection systems in
9VAC5-40-5824 or include a
demonstration to the board's satisfaction of the sufficiency of the alternative
provisions to
9VAC5-40-5824.
(4) The board will review the information
submitted under subdivisions C 2 a (1), (2) and (3) of this section and either
approve it, disapprove it, or request that additional information be submitted.
Because of the many site-specific factors involved with landfill gas system
design, alternative systems may be necessary. A wide variety of system designs
are possible, such as vertical wells, combination horizontal and vertical
collection systems, or horizontal trenches only, leachate collection
components, and passive systems. All design plan changes shall be submitted to
the board and may be implemented only upon approval of the board.
b. Install a collection and
control system that captures the gas generated within the landfill as required
by subdivision C 2 b (1) or (2) of this section within 30 months after the
first annual report in which the emission rate equals or exceeds (i) 23
megagrams per year in the Northern Virginia Volatile Organic Compound Emissions
Control Area or (ii) 50 megagrams per year in the remaining areas of the
Commonwealth, unless Tier 2 or Tier 3 sampling demonstrates that the emission
rate is less than (a) 23 megagrams per year in the Northern Virginia Volatile
Organic Compound Emissions Control Area or (b) 50 megagrams per year in the
remaining areas of the Commonwealth, as specified in
9VAC5-40-5880 E 1 or E 2.
(1) An active collection system shall:
(a) Be designed to handle the maximum
expected gas flow rate from the entire area of the landfill that warrants
control over the intended use period of the gas control or treatment system
equipment;
(b) Collect gas from
each area, cell, or group of cells in the landfill in which the initial solid
waste has been placed for a period of:
(i)
Five years or more if active; or
(ii) Two years or more if closed or at final
grade;
(c) Collect gas
at a sufficient extraction rate;
(d) Be designed to minimize off-site
migration of subsurface gas.
(2) A passive collection system shall:
(a) Comply with the provisions specified in
subdivisions C 2 b (1) (a), (b), and (d) of this section.
(b) Be installed with liners on the bottom
and all sides in all areas in which gas is to be collected. The liners shall be
installed as required under
9VAC20-81-130.
c. Route all the collected gas to
a control system that complies with the requirements in either subdivision C 2
c (1), (2) or (3) of this section.
(1) An open
flare designed and operated in accordance with
40 CFR
60.18.
(2) A control system designed and operated to
reduce NMOC by 98 weight-percent, or, when an enclosed combustion device is
used for control, to either reduce NMOC by 98 weight-percent or reduce the
outlet NMOC concentration to less than 20 parts per million by volume, dry
basis as hexane at 3.0% oxygen. The reduction efficiency or parts per million
by volume shall be established by an initial compliance test to be completed no
later than 180 days after the initial startup of the approved control system
using the test methods specified in
9VAC5-40-5860 E.
(a) If a boiler or process heater is used as
the control device, the landfill gas stream shall be introduced into the flame
zone.
(b) The control device shall
be operated within the parameter ranges established during the initial or most
recent compliance test. The operating parameters to be monitored are specified
in 9VAC5-40-5870.
(3) Route the collected gas to a treatment
system that processes the collected gas for subsequent sale or use. All
emissions from any atmospheric vent from the gas treatment system shall be
subject to the requirements of subdivision C 2 c (1) or (2) of this
section.
d. Operate the
collection and control device installed to comply with this article in
accordance with the provisions of
9VAC5-40-5822,
9VAC5-40-5850, and
9VAC5-40-5870.
e. The collection and control system may be
capped or removed provided that all the conditions of subdivisions C 2 e (1),
(2), and (3) of this section are met:
(1) The
landfill shall be a closed landfill as defined in
9VAC5-40-5810 and under the
requirements of
9VAC20-81-160. A closure report
shall be submitted to the board as provided in
9VAC5-40-5880 F;
(2) The collection and control system shall
have been in operation a minimum of 15 years; and
(3) Following the procedures specified in
9VAC5-40-5860 C, the calculated
NMOC gas produced by the landfill shall be less than (i) 23 megagrams per year
in the Northern Virginia Volatile Organic Compound Emissions Control Area or
(ii) 50 megagrams per year in the remaining areas of the Commonwealth on three
successive test dates. The test dates shall be no less than 90 days apart and
no more than 180 days apart.
