WV0400054_Variance Request_20191211

ROY COOPER
Governor
MCHAEL S. REGAN
seaetay
LINDA CULPEPPER
Director
Gerry Tygielski
Ashe County Habitat for Humanity
P.O. Box 392
West Jefferson, North Carolina 28694
NORTH CAROLINA
EnWronmenta/QuaUly
December 11, 2019
RE: Variance Request to Rules 15A NCAC 02C .0222 Geothermal Aqueous Closed -Loop Wells
154 Ridgeside Drive, West Jefferson, Ashe County
Well Variance Permit #WV0400054
Dear Mr. Tygielski:
On November 22, 2019 the Winston-Salem Regional Office received a written request for a variance to the
geothermal well construction rules. Rule 15A NCAC 02C .0222 states that the minimum horizontal
separation between a geothermal aqueous closed -loop well and a land -based or subsurface waste storage or
disposal system is 50 feet.
One geothermal aqueous closed -loop well will installed closer than 50 feet from the site septic system. This
variance request is for locating the well closer to the 50-foot limit. Due to the small size of the site lot,
there is no other location for the geothermal well and it will necessary to install the well closer than the
limits outlined in 15A NCAC 02C .0222. The factors specified are sufficient to satisfy the conditions for
approval of a variance as defined in 15A NCAC 02C .0118. The granting of this variance is for the well
location only, and in no way relieves the owner or agent from other requirements of the North Carolina
Well Construction Standards, or any other applicable law, rule or regulation that may be regulated by other
agencies.
If you have any questions regarding this variance, please contact me or Jim Gonsiewski at (336) 776-
9800.
Sincerely,
CI UocuS�igrnetllby'
1-4, g 5.1d
Lon i IRNr A
Regional Supervisor
Winston-Salem Regional Office
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ — WSRO
cc: Paul Poyner— Doby's Plumbing (electronic copy)
Appalachian District Health Department (Ashe County) (electronic copy)
00 North Carolina Department of Environmental Quality I Division of Water Resources
Winston-Salem Regional Offlae. 145OWest Hanes Null Road Suite 3001 Winston-Salem, North Carolina 27105
N � 336.7769800

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The proposed geothermal aqueous closed loop system for the address listed on page 1 is in
need of a distance requirement variance. The location of the residential operational drain field
recovery area is impeding the location of the geothermal closed loop fields causing them to be
located within the required 50' septic system setback distance. We are proposing to locate the
vertical bore on the front right side of the residence. In this manner we can obtain maximum
safety distance from the septic system and achieve a very high degree of human health and
environmental protection. The vertical bore will be grouted from top to bottom with high
quality, low permeability grout using the tremie method to assure the bore hole will be a solid
plug of environmental protection. The bore holes we construct will be the safest points of
ground water intrusion on the property when compared to the native geology. We will
construct triangulated borehole construction maps for the hole for permanent locating and
install metal detection tape in all of the horizontal connecting trenches to facilitate easy bore
hole locating if ever needed for any reason. Due to the fact a geothermal vertical closed loop is
constructed in the same manner as an abandoned well and does not move water, does not
contain well screens or casing and is not an actual water well, future service will not be
required.

Item I
The proposed geothermal aqueous closed loop system for the address listed on page 1 is in
need of a distance requirement variance. The location of the residential operational drain field
recovery area is impeding the location of the geothermal closed loop fields causing them to be
located within the required 50' septic system setback distance. We are proposing to locate the
vertical bore on the front right side of the residence. In this manner we can obtain maximum
safety distance from the septic system and achieve a very high degree of human health and
environmental protection. The vertical bore will be grouted from top to bottom with high
quality, low permeability grout using the tremie method to assure the bore hole will be a solid
plug of environmental protection. The bore holes we construct will be the safest points of
ground water intrusion on the property when compared to the native geology. We will
construct triangulated borehole construction maps for the hole for permanent locating and
install metal detection tape in all of the horizontal connecting trenches to facilitate easy bore
hole locating if ever needed for any reason. Due to the fact geothermal vertical closed loop is
constructed in the same manner as an abandoned well and does not move water, does not
contain well screens or casing and is not an actual water well, future service will not be
required.