(A) Each owner or operator seeking to comply
with paragraph (B)(2)(a) of rule
3745-76-07
of the Administrative Code shall site active collection wells, horizontal
collectors, surface collectors, or other extraction devices at a sufficient
density throughout all gas producing areas using the following procedures
unless alternative procedures have been approved by the director as provided in
paragraph (B)(2)(a)(iii) of rule
3745-76-07
of the Administrative Code and paragraph (B)(2)(a)(iv)) of rule
3745-76-07
of the Administrative Code:
(1) The
collection devices within the interior and along the perimeter areas shall be
certified to achieve comprehensive control of surface gas emissions by a
professional engineer. The following issues shall be addressed in the design:
depths of refuse, refuse gas generation rates and flow characteristics, cover
properties, gas system expandibility, leachate and condensate management,
accessibility, compatibility with filling operations, integration with closure
end use, air intrusion control, corrosion resistance, fill settlement,
resistance to the refuse decomposition heat, and maintenance of the integrity
of the final cover around each well.
(2) The sufficient density of gas collection
devices determined in paragraph (A)(1) of this rule shall address landfill gas
migration issues and augmentation of the collection system through the use of
active or passive systems at the landfill perimeter or exterior.
(3) The placement of gas collection devices
determined in paragraph (A)(1) of this rule shall control all gas producing
areas, except as provided by paragraphs (A)(3)(a) and (A)(3)(b) of this rule.
(a) Any segregated area of asbestos or
nondegradable material may be excluded from collection if documented as
provided under paragraph (D) of rule
3745-76-13
of the Administrative Code. The documentation shall provide the nature, date of
deposition, location and amount of asbestos or nondegradable material deposited
in the area, and shall be provided to the director upon request.
(b) Any nonproductive area of the landfill
may be excluded from control, provided that the total of all excluded areas can
be shown to contribute less than one percent of the total amount of NMOC
emissions from the landfill. The amount, location, and age of the material
shall be documented and provided to the director upon request. A separate NMOC
emissions estimate shall be made for each section proposed for exclusion, and
the sum of all such sections shall be compared to the NMOC emissions estimate
for the entire landfill. Emissions from each section shall be computed using
the following equation:
For Formula - To obtain the appendix, table, image, etc. please
call LSC's ERF Helpdesk at 614-387-2078 or send an email to
erfhelpdesk@lsc.state.oh.us.
Where,
Qi = NMOC emission rate from the ith section, megagrams per
year
k = methane generation rate constant, year-1
Lo = methane generation potential, cubic meters per megagram
solid waste
Mi = mass of the degradable solid waste in the ith section,
megagram
ti = age of the solid waste in the ith section, years
CNMOC = concentration of nonmethane organic compounds, parts
per million by volume
3.6 x 10-9 = conversion factor
(c) The values for k, and CNMOC determined in
field testing shall be used, if field testing has been performed in determining
the NMOC emission rate or the radii of influence (the distance from the well
center to a point in the landfill where the pressure gradient applied by the
blower or compressor approaches zero). If field testing has not been performed,
the default values for k, Lo, and CNMOC provided in paragraph (A)(1) of rule
3745-76-09
of the Administrative Code or the alternative values from paragraph (A)(5) of
rule
3745-76-09
of the Administrative Code shall be used. The mass of nondegradable solid waste
contained within the given section may be subtracted from the total mass of the
section when estimating emissions provided the nature, location, age, and
amount of the nondegradable material is documented as provided in paragraph
(A)(3)(a) of this rule.
(B) Each owner or operator seeking to comply
with paragraph (B)(2)(a)(i) of rule
3745-76-07
of the Administrative Code shall construct the gas collection devices using the
following equipment or procedures:
(1) The
landfill gas extraction components shall be constructed of polyvinyl chloride
(PVC), high density polyethylene (HDPE) pipe, fiberglass, stainless steel, or
other nonporous corrosion resistant material of suitable dimensions to: convey
projected amounts of gases; withstand installation, static, and settlement
forces; and withstand planned overburden or traffic loads. The collection
system shall extend as necessary to comply with emission and migration
standards. Collection devices such as wells and horizontal collectors shall be
perforated to allow gas entry without head loss sufficient to impair
performance across the intended extent of control. Perforations shall be
situated with regard to the need to prevent excessive air infiltration.
(2) Vertical wells shall be placed
so as not to endanger underlying liners and shall address the occurrence of
water leachate within the landfill. Holes and trenches constructed for piped
wells and horizontal collectors shall be of sufficient cross-section so as to
allow for their proper construction and completion including, for example,
centering of pipes and placement of gravel backfill. Collection devices shall
be designed so as not to allow indirect short circuiting of air into the cover
or refuse into the collection system or gas into the air. Any gravel used
around pipe perforations should be of a dimension so as not to penetrate or
block perforations.
(3) Collection
devices may be connected to the collection header pipes below or above the
landfill surface. The connector assembly shall include a positive closing
throttle valve, any necessary seals and couplings, access couplings and at
least one sampling port. The collection devices shall be constructed of PVC,
HDPE, fiberglass, stainless steel, or other nonporous material of suitable
thickness.
(C) Each
owner or operator seeking to comply with paragraph (B)(2)(a)(i) of rule
3745-76-07
of the Administrative Code shall convey the landfill gas to a control system in
compliance with paragraph (B)(2)(c) of rule
3745-76-07
of the Administrative Code through the collection header pipe(s). The gas mover
equipment shall be sized to handle the maximum gas generation flow rate
expected over the intended use period of the gas moving equipment using the
following procedures:
(1) For existing
collection systems, the flow data shall be used to project the maximum flow
rate. If no flow data exists, the procedures in paragraph (C)(2) of this rule
shall be used.
(2) For new
collection systems, the maximum flow rate shall be in accordance with paragraph
(A)(1) of rule
3745-76-10
of the Administrative Code.
Notes
Ohio Admin. Code 3745-76-14
Five Year Review (FYR) Dates:
03/24/2016 and
03/24/2021
Promulgated
Under: 119.03
Statutory
Authority: 3704.03(E)
Rule Amplifies:
3704.03(A),
3704.03(E)
Prior Effective Dates: 1/31/98, 11/16/99,
10/10/06
R.C. 119.032 review dates:
06/16/2011 and
06/16/2016
Promulgated
Under: 119.03
Statutory Authority: 3704.03(E)
Rule
Amplifies: 3704.03(A), 3704.03(E)
Prior Effective Dates: 1/31/98,
11/16/99, 10/10/06