| (I) aquifer names and their association with geologic
units described in clause (i) of this subparagraph;
(II) a description of the composition of the aquifer(s);
(III) a description of the hydraulic properties of
the aquifer(s);
(IV) identification of areas of recharge to the aquifers
within five miles of the site; and
(V) the present use of groundwater withdrawn from aquifers
in the vicinity of the facility;
(iv) subsurface investigation report. This report shall
describe all borings drilled on site to test soils and characterize
groundwater and shall include a site map drawn to scale showing the
surveyed locations and elevations of the boring. Boring logs shall
include a detailed description of materials encountered including
any discontinuities such as fractures, fissures, slickensides, lenses,
or seams. Each boring shall be presented in the form of a log that
contains, at a minimum, the boring number; surface elevation and location
coordinates; and a columnar section with text showing the elevation
of all contacts between soil and rock layers description of each layer
using the Unified Soil Classification, color, degree of compaction,
and moisture content. A key explaining the symbols used on the boring
logs and the classification terminology for soil type, consistency,
and structure shall be provided.
(I) A sufficient number of borings shall be performed
to establish subsurface stratigraphy and to determine geotechnical
properties of the soils and rocks beneath the facility. The number
of borings necessary can only be determined after the general characteristics
of a site are analyzed and will vary depending on the heterogeneity
of subsurface materials. The minimum number of borings required for
a site shall be three for sites of five acres or less, and for sites
larger than five acres the required number of borings shall be three
borings plus one boring for each additional five acres or fraction
thereof. The boring plan shall be approved by the executive director
prior to performing the bores.
(II) Borings shall be sufficiently deep to allow identification
of the uppermost aquifer and underlying hydraulically interconnected
aquifers. Boring shall penetrate the uppermost aquifer and all deeper
hydraulically interconnected aquifers and be deep enough to identify
the aquiclude at the lower boundary. All the borings shall be at least
30 feet deeper than the elevation of the deepest excavation on site
and in no case shall be less than 30 feet below the lowest elevation
on site. If no aquifers exist within 50 feet of the elevation of the
deepest excavation, at least one test bore shall be drilled to the
top of the first perennial aquifer beneath the site. In areas where
it can be demonstrated that the uppermost aquifer is more than 300
feet below the deepest excavation, the applicant shall provide the
demonstration to the executive director and the executive director
shall have the authority to waive the requirement for the deep bore.
(III) All borings shall be conducted in accordance
with established field exploration methods.
(IV) Installation, abandonment, and plugging of the
boring shall be in accordance with the rules of the commission.
(V) The applicant shall prepare cross-sections utilizing
the information from the boring and depicting the generalized strata
at the facility.
(VI) The report shall contain a summary of the investigator's
interpretations of the subsurface stratigraphy based upon the field
investigation;
(v) groundwater investigation report. This report shall
establish and present the groundwater flow characteristics at the
site which shall include groundwater elevation, gradient, and direction
of flow. The flow characteristics and most likely pathway(s) for pollutant
migration shall be discussed in a narrative format and shown graphically
on a piezometric contour map. The groundwater data shall be collected
from piezometers installed at the site. The minimum number of piezometers
required for the site shall be three for sites of five acres or less,
for sites greater than five acres the total number of piezometer required
shall be three piezometer plus one piezometer for each additional
five acres or fraction thereof.
(C) Groundwater protection plan. The application shall
demonstrate that the facility is designed so as not to contaminate
the groundwater and so as to protect the existing groundwater quality
from degradation. For the purposes of these sections, protection of
the groundwater includes the protection of perched water or shallow
surface infiltration. As a minimum, groundwater protection shall consist
of all of the following.
(i) Liner system. All feedstock receiving, mixing,
composting, post-processing, screening, and storage areas shall be
located on a surface that is adequately lined to control seepage.
The lined surface shall be covered with a material designed to withstand
normal traffic from the composting operations. At a minimum, the lined
surface shall consist of soil, synthetic, or an alternative material
that is equivalent to two feet of compacted clay with a hydraulic
conductivity of 1 x 10-7 centimeters
per second or less.
(I) Soil liners shall have more than 30% passing a
number 200 sieve, have a liquid limit greater than 30%, and a plasticity
index greater than 15.
(II) Synthetic liners shall be a membrane with a minimum
thickness of 20 mils.
(III) Alternative designs shall utilize an impermeable
liner (such as concrete).
(ii) Groundwater monitor system. The groundwater monitoring
system shall be designed and installed such that the system will reasonably
assure detection of any contamination of the groundwater before it
migrates beyond the boundaries of the site. The monitoring system
shall be designed based upon the information obtained in the "Groundwater
investigation report" required by subparagraph (B)(v) of this paragraph.
(I) Details of monitor well construction and placement
of monitor wells shall be shown on the site plan.
(II) A groundwater sampling program shall provide four
background groundwater samples of all monitor wells within 24 months
from the date of the issuance of the permit. The background levels
shall be established from samples collected from each well at least
once during each of the four calendar quarters: January - March; April
- June; July - September; and October - December. Samples from any
monitor well shall not be collected for at least 45 days following
collection of a previous sample, unless a replacement sample is necessary.
At least one sample per well shall be collected and submitted to a
laboratory for analysis within 60 days of permit issuance for existing
or previously registered operations, or prior to accepting any material
for processing at a new facility. Background samples shall be analyzed
for the parameters as follows:
(-a-) heavy metals, arsenic, copper, mercury, barium,
iron, selenium, cadmium, lead, chromium, and zinc;
(-b-) other parameters: calcium, magnesium, sodium,
carbonate, bicarbonate, sulphate, fluoride, nitrate (as N), total
dissolved solids, phenolphthalein alkalinity as CaCO3 , alkalinity as CaCO3 ,
hardness as CaCO3 , pH, specific conductance,
anion-cation balance, groundwater elevation (measured in Mean Sea
Level (MSL)), and total organic carbon (TOC) (four replicates/sample);
and
(-c-) after background values have been determined,
the following indicators shall be measured at a minimum of 12-month
intervals: TOC (four replicates), iron, manganese, pH, chloride, groundwater
elevation (measured in MSL), and total dissolved solids. After completion
of the analysis, an original and two copies shall be sent to the executive
director and a copy shall be maintained on site.
(-d-) The executive director may waive the requirement
to monitor for any of the constituents listed in items (-a-) - (-c-)
of this subclause in a permit, if it can be documented that these
constituents are not reasonably expected to be in or derived from
the bulking or feedstock materials. A change to the monitoring requirements
may be incorporated into a permit when issued or as a modification
under §305.70 of this title (relating to Municipal Solid Waste
Permit and Registration Modifications).
(-e-) The executive director may establish an alternative
list of constituents for a permit, if the alternative constituents
provide a reliable indication of a release to the groundwater. The
executive director may also add inorganic or organic constituents
to those to be tested if they are reasonably expected to be in or
derived from the bulking or feedstock materials. A change to the monitoring
requirements may be incorporated into a permit when issued or as a
modification under §305.70 of this title.
Cont'd... |
