20210413_ADI_Response

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m"Hanson
HEIDELBERGCEMENTGroup
Hanson Aggregates Southeast,LLC
South Region
North Carolina Territory Office
3825 Barrett Drive,Suite 300
Morrisville,NC 27560-9626
Tel [phone]
Fax [phone]
w .lehiahhanson.com
April 8, 2021
Mr. Adam R. Parr, Asst. State Mining Engineer RECEIVED
NC Department of Environmental Quality
Division of Energy, Mineral, and Land Resources APR 1 3 1011
512 North Salisbury Street, Archdale Bldg, Room 504
Raleigh, NC 27604 LAND QUALITY
Subject: Hanson Aggregates Southeast, LLC— Raleigh Quarry MINING PROGRAM
Response to DEQ March 1, 2021 Request for Information
and Request to Reclassify a Designated Undisturbed Buffer
as an Unexcavated Buffer
NC Mine Permit No. 92-02 Mine Modification Application Submittal
Wake Forest, Wake County, North Carolina
Dear Mr. Parr:
Hanson is hereby submitting a response to the Department's March 1, 2021
request for additional information. The responses are formatted in the manner they were
received, followed with our response shown in blue font. We appreciate your review and
comments regarding our application to provide a 6-acre area for a tenant to install a
concrete plant and entrance road at our Raleigh Quarry located in Wake Forest, NC.
1. The proposed entrance road is breaching an existing berm and undisturbed buffer.
This road will create an east-west passage for wind-blown dust and particles.
Please provide an explanation as to how dust will be mitigated.
Following discussions with NCDEQ and Tracy Davis of ATS Environmental
Solutions, Hanson has elected to reclassify a 50-ft x 440-ft strip of grassed
undisturbed buffer as an unexcavated buffer, so that an entrance road to the
proposed tenant concrete plant can be installed between the existing fence line and
existing 25-ft-high visual screening berm. With this entrance road location, no new
east-west passage through the existing stabilized berm screening the active mining
operation will be created. The entrance road will run from Ponderosa Service Road
parallel to an existing berm across the existing level grassed area down to the
proposed concrete plant area.
To address dust mitigation and visual screening of this new entrance road, Hanson
has proposed measures it and its tenant will take to mitigate dust and provide
visual screening on the M&EC-2 Mine Map and as shown below:

Dust Mitigation and Visual Screening Measures
Entrance road will be concrete or asphalt paved as soon as the plant is constructed.
Tenant will wet the concrete plant area and entrance road as needed with water truck,
sprinklers, or other means.
Tenant ensures that trucks are washed prior to exiting the concrete plant.
Permittee will install speed limit signs along the entrance road.
6-foot Emerald Green Arborvitae trees, or the like, will be installed along the existing
fence at 4-foot centers starting at Ponderosa Service Road and stopping at the point
where existing trees already screen any activity. Initially, 13 trees are planned for a
distance of 52 feet.
If for any reason, one or more trees owned by the permittee or the adjoining property
owner are removed within this buffer area, the permittee will replace the screening gap
with evergreen trees as soon as practical.
Permittee will conduct periodic visual inspections and evaluate the effectiveness of the
dust mitigation and visual screening efforts.
Hanson is confident that by taking the above stated dust and visual screening
mitigation measures, there will be minimal impacts resulting from installing the
paved entrance road as shown on the attached revised mine maps.
2. The revised diversion ditch for Sediment Trap A-7 and the visual screening berm in
the same vicinity still appear to impact the eastern most end of'Stream 1" as
depicted on the US Army Corps of Engineering Jurisdictional Delineation. Please
clarify how impact to "Stream 1" will be mitigated.
The permitted western visual berm has been shortened and diversion ditch/berms
installed to allow berm construction run-off to flow directly to Sediment Trap A-7.
These measures will ensure there are no impacts to Stream 1. Please see M&EC-4.
We trust the above responses satisfactorily address the Department's concerns and that
the processing of the modification application can continue. Two (2) complete sets of
revised mine maps are attached to this cover letter. Should you have any questions or
need additional information, please contact me at our Raleigh office: [phone],
Jack.Garvev a(7lehighhanson.com , and you may also contact our contracted engineer,
Ryan Fisher: [phone], rfisheranwithersravenel.com .
Sincerely,
Jack Garvey, Environmental Manager
Enclosures:
cc: Daren McMorris, NC Operations Manager
Randy Vinkler, Plant Manager
Ryan Fisher, WithersRavenel
Tracy Davis, ATS Environmental Solutions, PLLC