Jordan Land Development, Inc. NOV Response

Jordan Land Development, Inc.
P.O. Box 863
West Jefferson, NC 28694
Office: 336-246-7244
Fax: [phone]
Email:[e-mail]
June 4, 2021
NC Department of Environment
& Natural Resources
Land Quality Section
1612 Mail Service Center
Raleigh, NC 27699-1612
Attn: Brian Wrenn, Director
RE: West Jefferson Quarry
Mining Permit No. 05-07
Ashe County
New River Basin
Dear Mr. Wrenn:
In regards to Notice of Violation of Mining Permit#: 05-07 Ashe County, New River Basin help by Jordan
Land Development, Inc. in order to bring the site into compliance the following corrective actions have
been taken as per page 2 on the Certified Mail Document
1. All blasting operations at the West Jefferson Quarry have been suspended until the NC
Department of Environment and Natural Resources releases the site forfurther blasting activities.
2. All blast records were provided immediately, by email to Ms. Jenna Spencer-Assistant Mining
Engineer when she requested the records. Attached is documentation from Kesco, Inc. who
conducted a study on why the April 26, 2021 blast exceeded the maximum peak particle velocity
limit. The changes that Kesco, Inc.will immediately implement are outlined in the last paragraph
of this document labeled Corrective Action. Also please see the seismograph placement and
reading training course conducted by a third party-GeoSonics Inc.
3. The protocol for reporting excessive reading to the Department is as follows:
A. Once a blast is complete the seismograph readings will be reviewed immediately by
Jordan Land Development management and if excessive peak velocity is noted the
NC Department of Environment and Natural Resources will be contacted by
Calling the number listed on this notice of violation to report the excessive reading
immediately. In addition to a phone call placed an email contact will be obtained from the
phone call and The seismograph readings will be emailed to NCDEQ. The above protocol will
be implemented immediately as soon as a blast has occurred.

4. Going forward: Jordan Land Development, Inc. will provide the Division of Energy, Mineral and
Land Resources complete records for each blast performed at the mine site after the April 26,
2021. This corrective action outlined in #4 will be completed for each blast until Jordan Land
Development, Inc. receives further notice from the Division of Energy, Mineral, and Land
Resources. Blasting records will be mailed to the Division of Energy, Mineral, and Land Resources
going forward after blasting activities are allowed to resume.
A] C
Patricia G. rdan
President
Jordan Land Development, Inc.
Enclosures attached: Kesco, Inc documentation
Training Certificates completed by GeoSonics, Inc for Seismograph Training and Instruction
Google Earth- Legend of Blast Area

- neco
2 1 5 s o u t h M a i n S t r e c t , S u i t c 3 , Z c I i e n o p l e , P A 1 6 0 6 3
May 25,2021
Brian Wrenn, Director
Division of Energy, Mineral, and Land Resources
217 West Jones St.
Raleigh,NC 27603
Re: Response to West Jefferson Quarry Mining Permit No. 05-07 NOV
Mr. Wrenn,
KESCO,Inc accepts responsibility for improper seismograph setup resulting in a decoupled reading that
exceeded the maximum peak velocity at the nearest structure. This was verified by review of the signature wave
and accelerating data. This was due to geophone setup, not the blast itself. Corrective action is being taken to
rectify the issue.
Considering the maximum pounds of explosives per hole(35 lbs)and the maximum pounds per delay(42 Ibs)at
a distance of 150' to the seismograph, the PPV should have measured approximately 1.05 — 1.37"/sec.
This has been a difficult location to secure the seismograph. Coupling of the vibration sensor is the most
important factor to ensure accurate ground vibration recordings. The sensor should be placed on or in the ground
on the comer of the structure(within 10')towards the blast, and if the vibration is predicted to be above 0.5"/sec
should be buried or secured with and bags. An attempt was made to secure the geophone with stakes but was in
loose ground. The unit was not as secure as it should have been, and it decoupled giving an inaccurate reading.
The data verifies that the seismograph was coupled poorly,as it experienced an acceleration on all three
components over 1 G, and over 2G on the highest transverse component. Two third-party evaluations of this
incident confirmed the information stated above. Anthony Konya of Precision Blasting Services participated in a
seismograph placement&reading training course, along with our supplier GeoSonics Inc.
As to the complaint, this location will be monitored as well for the next two blasts.
Corrective action: The President,Operations Manager,and Blaster have attended additional documented
training on seismograph operation and placement. Moving forward,the seismograph will be placed in the
proper location and secured with sandbags due to site conditions. This will provide a secure placement
and proper readings.
Respectfully Yours,
Roger Martin cc: Mr. David Miller, P.E.
KESCO,Inc Ms. Tamera Eplin,P.E.

O � rt� � I�' �r� � i! illll 4 f � ��+ ' II�� I � III iIl I'll ( I` �,� I �I I �I�II � I P• l �� ��111NIr.;I1110 ;r
1l
Q O
O 10
=emslen CD _
. _
�-�- �O\)
N CDV i
O O
p - -
O cn
tv
CD
I it 1 I I I I lir I i I r li � III
I
���
l , III i Illlll��� ��I. �l. I.�. III. t!! Iililllll �i il. ilf�lll III I i�I�it'll ,s il� Ii�911I1 i .III �' I�� i � . R I �II�II'•'�

70
zi
-
w � C7 CD
N CD
O O
o A o A, p C�
CD
O
Zt
'V O
�O
I � I 1 ; I III IIt I I 1 III I I'jl Gil � � i �Ii'i'lj ;ll IfI I
I I:. (I I I II I l III II I �'jI IIII III 1 II j - II II � 1 '..f_:I li III I � n}� I III
IIII IiIIi{II ,III �� i� l n; 11 i��ll�l I IIII III �IIj; II.till inj fll ll� � � l I'i ili ll I'I � �iIAI ,IIIi;I IIII � Q ; � (
_� it ihfll I �IfI�I�if I;i it l�if4ill l�nll l�� il� II �.hilltr!I I,• III 1;;;� :I��t�lt� ��� � I �ni�Ilnhllll i IIII IIII I Ilf�I,Il IIII iliif��l tl� (�� �I � IIII ( �i i f�ll

A Y< IF N
'9 aim
� 4
�������y� �.r.'W '4FZ' ES�a�f3��1`:'�.t k�.A� a Lys{•
W a
A
St {�d
t`Y^
F d l 1 i 1�) ��� r �r 4 t• l�ro ° �,-re
t
;i * �ry'�4
7`
irvM y.".
� a L
/ � f5*Cah1�F� 4 q �� ���yey�4✓'F-.Iyt•Jry TA���kY€��\ �[Rb"a�'
�,�q �� ♦ qF �J';in r '+' :r F� at-4�i6.{.s1. `VP`;riYmrF
y
6
m
t ` fit ''° `i>iElrrd "'maIy Mil
ri m
1 r 1 BB