20210804_close_out_13-04

rd W J
ROY COOPER
Governor o
ELIZABETH S.BISER M "
Secretary
BRIAN WRENN NORTH CAROLINA
Director Envlrortmenfal Quality
August 4, 2021
Mr. Bryan Moore
Safety& Health Manager NC & SC
Vulcan Materials Company
11020 David Taylor Drive
Suite 400
Charlotte, NC 28262
RE: On-going Blasting Complaint, 2020 & 2021
Gold Hill Quarry, Mine Permit No. 13-04
Cabarrus County
Dear Mr. Moore:
The review has been completed on the shot records your firm previously submitted.
For the period of January 7, 2020, until June 14, 2021, blasting at the Gold Hill Quarry has been found
to be compliant with the blasting conditions outlined in Mining Permit No. 13-04.
Accordingly, the results of DEMLR's investigation did not reveal permit condition violations or
violations of the Mining Act for the subject site.
The Mining Program understands that the complainant may have concerns with Gold Hill Quarry
Mining Operations that are or may be ongoing. Our experiences are that direct communication can often
provide helpful information and/or solutions to concerns voiced by adjoining landowners.
Accordingly, this office has suggested to the complainant to contact you so that this matter may be
discussed and considered further by both parties.
I would also like to thank Vulcan Materials for supplying to the Mining Program the DeepEarth Logic
report titled "Seismograph Data Analysis Mishak (15680 Glenmore Road) Vulcan Materials Gold Hill
Quarry" dated June 2021.
Thank you for your continued cooperation. If you should have any questions on the above, please
contact me at [phone].
Sincerely,
David Miller
State Mining Engineer
cc: Mr. David Miller, North Carolina State Mining Engineer
Mr. Zahid Khan, Mooresville Regional Supervisor
North Carolina Department of Environmental Quality I Division of Energy.Mineral and Land Resources
./ 512 North Salisbury Street 11612 Mail Service Center I Raleigh,North Carolina 2 76 9 9-1612
919,707.9200

ROY COOPER
Governor
ELIZABETH S.BISER «..
Secretary
BRIAN WRENN NORTH CAROLINA
Director Environmental Quality
August 4, 2021
Mr. Robert Mishak
15680 Glenmore Road
Gold Hill, NC 28071
RE: On-going Blasting Complaint
Gold Hill Quarry, Mine Permit No. 13-04
Cabarrus County
Dear Mr. Mishak:
Our office has completed its review of Vulcan Material's blasting information,
including blast reports and seismograph recordings, related to the blasting conducted
between January 7, 2020, until June 14, 2021, at the Gold Hill Quarry. It was found that
Vulcan Material was compliant with the blasting requirements of its mining permit during
the period in question.
All peak particle velocities, a measurement of ground vibration with units in inches
per second (ips), were well below the maximum allowable limits specified in Vulcan
Material's mining permit. More specifically, all recorded values were at or below 0.13 ips
at the closest offsite occupied structure (the location where compliance with the permit
limits is determined). According to extensive research by the U.S. Bureau of Mines and
others, particle velocities below 0.5 ips effectively eliminate the possibility of any structural
damage.
All airblast readings, a measurement of the atmospheric pressure wave
(overpressure) with units in psi or dBL, were also below the maximum allowable limits
specified in the mining permit and well below the U. S. Bureau of Mines' recognized level
of 164 dBL for prevention of glass breakage. A key point worth noting is that glass
breakage occurs at much lower levels of overpressure than structural damage, such as
cracking plaster.
The results of the shot I monitored at your property on June 4, 2021, showed a
peak velocity of 0.068 ips at 24 Hz, and an acoustical peak of 111 dBL; both amounts are
below the Mining Permit limits.
�c101 D_E 0% . North Carolina Department of Environmental Quality I Division of Energy.Mineral and Land Resources
�i/p 512 North Salisbury Street 1 1612 Mail Service Center I Raleigh,North Carolina 2 769 9-1612
O
°i^�• _N _' 919.707.9200

Page 2
Vulcan Materials hired DeepEarth Logic to investigate your case. DeepEarth has
prepared a report titled "Seismograph Data Analysis Mishak (15680 Glenmore Road)
Vulcan Materials Gold Hill Quarry." The report shows the company is compliant with their
Mining Permit. I have attached a copy of the report for your use.
Accordingly, the results of DEMLR's investigation did not reveal permit condition
violations or violations of the Mining Act for the subject site. We understand that you
may have concerns with Gold Hill Quarry Mining Operations that are or may be ongoing.
Our experiences are that direct communication with mine site owners can often provide
helpful information and/or solutions to concerns voiced by adjoining landowners. Bryan
Moore, Vulcan Materials Safety & Health Manager NC & SC, 111020 David Taylor Drive,
Suite 400, Charlotte, NC, 28262, telephone [phone], is our contact at Vulcan that
is familiar with this situation.
Thank you for your attention to this matter. Please do not hesitate to call me as
well if you have any additional questions or concerns at [phone].
Sincerely,
David Miller
State Mining Engineer
c: Mr. David Miller, North Carolina State Mining Engineer
Mr. Zahid Khan, Mooresville Regional Supervisor

>ww;
Deep Earth
L O G I C
Seismograph Data Analysis
Mishak (15680 Glemnore Road)
Vulcan Materials
Gold Hill Quarry
Deep Earth Logic,LLC
June 2021

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
Seismograph Data Analysis
Mr.Mishak,located at 15680 Glenmore Road in Gold Hill,North Carolina,has expressed concern
regarding the controlled blasting performed at the Vulcan Materials Gold Hill quarry and the
perceived effects at his home. Deep Earth Logic monitors the vibration and air overpressure at a
permanent location closer to the quarry called the Vaughn Property. Deep Earth Logic has
prepared this report analyzing the seismograph results from the blasting and then compared that
data to the allowable state limits from the State of North Carolina and industry-accepted guidelines.
Deep Earth Logic also monitored a blast at Mr. Mishak's home on June 4, 2021.
The Vaughn Property is roughly 700 feet closer to the quarry than 15680 Glenmore Road.
AERIAL OVERVIEW
The aerial shows the location of 15680 Glenmore Road, the Vaughn Property, and the Vulcan
Gold Hill quarry.The closest blasting operations at the quarry occur approximately 1500 feet from
Vaughn Property and 2200 feet from 15680 Glenmore Road.
: , . Md
Vaughri Property
oe Quarfy
r
6
©Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
VIBRA TION ANAL YSIS AND REVIEW
Extensive seismic research during the last forty years has established ground motion criteria that
define the potential for the occurrence of both cosmetic and structural damage. Ground motion
criteria is most commonly expressed in terms of peak particle velocity (PPV), the rate of ground
movement at a given point produced by ground vibrations as they pass that point.
The United States Bureau of Mines (USBM) conducted numerous studies to determine a safe
vibration level for buildings near blasting activities to prevent even cosmetic damage. Their
recommendation was a vibration limit between 0.75 and 2.0 in/sec, which varies according to the
vibration frequency. The USBM recommends lower vibration levels at lower frequencies and
allows for higher vibration levels at higher frequencies. Practical, safe criteria for blasts that
generate low-frequency ground vibrations are 0.75 in/sec for modern gypsum board houses and
0.50 in/sec for plaster on lath interiors or sensitive structures. For frequencies above 40 Hz, a safe
particle velocity maximum of 2.0 in/sec is recommended for all houses and typical structures.
Many states, counties, and cities, including the State of North Carolina, have adopted the USBM
recommendation as a safe vibration level guideline.The USBM damage criterion is very stringent;
however,it is also a very conservative threshold measure of actual damage. In essence,if vibration
from a blast is over the USBM safe limit, it is not guaranteed that damage will always occur.
Scientific research has extensively shown that if the blasting activities do not produce vibration
levels that exceed the limits set by the US Bureau of Mines, the cosmetic damage potential (and
thereby structural damage) from blasting is zero.
The peak vibration recorded occurred on May 26, 2021 with a vibration level of 0.12 inch per
second at the Vaughn Property; and the peak air overpressure occurred on January 18, 2020 with
an air overpressure of 127 Decibels at the Vaughn Property. Appendix B,at the end of the report,
displays the actual seismograph waveform.
0 Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
SEISMOGRAPH RESULTS- VIBRATION
A seismograph monitors the ground for any vibration or movement. When the ground vibration
reaches a certain intensity level(also known as the trigger level),the seismograph will record that
vibration for a pre-determined amount of time(typically five to ten seconds). The seismograph set
up to monitor vibration at Vaughn Property had a trigger level set to 0.02in/sec.
The US Bureau of Mines graph shows the vibration results from the controlled blasting, recorded
at Vaughn Property. Any blasts that would not have triggered the seismograph do not appear in
this graph.
The recorded vibration levels resulting from the blasts at the Vulcan Gold Hill Quarry are well
within the North Carolina state legal limits and within the levels set forth by US Bureau of Mines
defining cosmetic damage criteria levels as described in the previous section.
Diagram #1 (tJ S Bureau of Mines Graph)
10
North Carolina State
• Closest Seismograph Data
m —Limits for Normal Structures
m
c
> - --Limits for Historical Structures
a
a
O
NO O 80000
• O O
aot
10
Hertz
0 Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
The standard US Bureau of Mines graph has the X and Y axis graphed on a log scale that is not as
visually accurate as a normally scaled graph for comparing the vibration levels to the limits. The
exact same diagram and information, but with a standard X and Y scale, is shown below. This
graph is also more visually accurate as to where the vibration levels occur compared to the North
Carolina state guidelines.
Diagram#2(US Bureau of Mines in NON-Log scale)
zs
North Carolina Stale
z >
♦ Closest Seismograph Data
—Limits for Normal Structures
is
---Limits for Historical Structures
c
4 ,
os
•
0
o +o xo eo 40 so r.o ry ao
Hertz
0 Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
AIR OVERPRESSURE REVIEW
In addition to vibration, the seismograph installed at Vaughn Property recorded the air
overpressure. The North Carolina state limit for air overpressure is 133 decibels. Similar to
vibration, air overpressure levels decrease when the distance to the point of blasting operations is
increased.
The air overpressure graph shows the air overpressure recorded at Vaughn Property. The air
overpressure was well under both the North Carolina state limit and industry guidelines outlining
damage criteria.
The most accurate way to represent air overpressure is in PSI (pounds per square inch). The air
overpressure for the blast is graphed on the PSI scale with the equivalent dBL level labeled on the
chart. The fifty-seven blasts that were monitored and recorded by the seismograph are shown on
the chart.
Air Overpressure Results
00u1
— — — — — — — — — — — — — —
North Carolina State
0,0121 ----
oblol
00081
(127 dBQ
00061
ti
tt
0 W41 tt
t t
ff + R R * t
0.0021 )
f�`'�y�`�1►�� .,,Y�f ••i'��•Y j •1 % Yr � 'wy,��y,,� J 1i ~• ,•y i' •i�H` ;
00001
PSI Scale
©Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
The US Bureau of Mines graph shows the vibration results from the controlled blast, recorded at
15680 Glenmore Road. Diagram W (U S Bureau or Mines Graph)
The recorded vibration levels resulting from the °
blasts at the Vulcan Gold Hill Quarry are well within
the North Carolina state legal limits and within the NPM Camara
levels set forth by US Bureau of Mines defming
' • Gmest Sevno]rq�Wb
cosmetic damage criteria levels as described in _ _________
—timAs fv Npmd SINMrPi
the previous section.
gwlm,n NiNmPa Amares
P
As discussed previously,the standard US Bureau of
Mines graph has the X and Y axis graphed on a log m
scale that is not as visually accurate as a normally a°m
scaled graph for comparing the vibration levels to the limits. The exact same graph and
information,but with a standard X and Y scale,is shown below. This is also more visually accurate
as to where the vibration levels occur as compared to the North Carolina state guidelines.
Diagram 02(US Bureau of Minea In NON-Log Seale)
Naafi Carolina Stale
• Closest Seismograph Date
—Limits for Normal Stmcturas
Y ---Limits for Historical Stmclures
S 1
Hxn
©Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
ENVIRONMENTAL STRESS
While the general public tends to think of a building as a "solid" structure, all structures and
materials are flexible,dynamic materials and constantly shift and respond to loads in the structure,
human activity, and natural forces (wind, gravity, etc.). Building materials shrink or swell due to
changes in ambient moisture and/or temperature; seasonal and even daily cycles can occur. Cyclic
widening and narrowing of existing cracks is often observed, and new cracking occurs in all
structures, over time, due to natural stresses. Even a newly completed house or renovated home
will be found to have interior cracks and gaps, especially at seams, headers, or where different
building materials are joined. Numerous studies well document these naturally occurring
phenomena.
Scientific research on blast effects has measured the effects of everyday environmental stresses as
they compare to controlled quarry blasting. Environmental stresses act slowly and mostly silently,
and so are less evident than blast events. However, even low levels of environmental stress are
well documented to exceed stress levels from the maximum allowable limits for blast effects.Some
of the results from several different researchers are summarized in the graph below.
Equivalent Vibration Levels
for Environmental Forces
1000
9.00 ----------------------------------------........."'........__..._...................-....................--.......
8.00 ....7:60..........................................................................................................
7.10
7,00 .. ...""-----..................... .........................................----...........
6.00 ... ........
dAO ...................... .............................................................
e
j54.00 .. ...... ..................... -___ ------------- __._..-._..-._.---___--_-___..__
s 2.90 __.._ 3.00
3.00 .. ------ ..................... ..______ __.___._. ---------- .__2.40
2.00 1.90
1.00 .. ...... ...... ...... ...... ....._ ...... _..... __.
0.00
Average Average Wmtl.8.8 Outside Inside Outside Inside Rate[ a Daily
Vibration for Vibration for MPH Temperature Temperature Relative Humidity Ermromental
Major Minor change of 27 change of 12 Humidity Change of Changes
Damage Damage degrees degrees Change of 35%
V Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
CONCLUSION
A close review of the low levels of recorded vibration and air overpressure at 15680 Glenmore
Road in addition to Vaughn Property seismic data demonstrate that the controlled quarry blasts
could not have caused and would not cause any adverse conditions at 15680 Glenmore Road. The
human body is very perceptible to vibration and air overpressure, especially while in a home or
structure, small vibration changes can be noticeable. This finding is based upon:
• Vibration&air overpressure data and blasting records from the Gold Hill quarry
• Evaluation of the current blasting program and off-site seismograph results
• Extensive scientific studies of blast vibration and air overpressure effects
• Strict limits imposed by the State of North Carolina and industry guidelines
• Observing similar conditions in structures where no blasting has occurred.
If I can be of any further assistance,please call me immediately.
Sincerely,
Deep Earth Logic,LLC
John Babcock
540-974-1029
0 Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Appendix A
Vaughn Property in/sec Hz dBL
6/14/21 0.055 56.8 112
6/4/21 0.085 42.6 114
5/26/21 0.12 64 112
5/19/21 0.06 102.4 110
5/13/21 0.1 30.1 116
5/6/21 0.06 64 116
4/23/21 0.075 85.3 106
4/6/21 0.09 42.6 112
3/25/21 0.035 64 116
3/15/21 0.04 36.5 116
3/4/21 0.07 51.2 117
2/24/21 0.03 26.9 117
2/16/21 0.035 64 110
2/1/21 0.03 56.8 112
1/25/21 0.05 64 118
1/14/21 0.07 102.4 112
1/8/21 0.05 39.3 114
12/29/20 0.045 46.5 116
12/17/20 0.07 73.1 116
12/10/20 0.06 42.6 112
12/3/20 0.03 34.1 120
11/25/20 0.075 85.3 106
11/18/20 0.07 25.6 127
11/11/20 0.035 64 121
11/2/20 0.055 85.3 110
10/19/20 0.045 64 117
10/5/20 0.025 32 114
9/22/20 0.065 51.2 120
9/16/20 0.08 64 117
9/8/20 0.1 39.3 116
8/20/20 0.07 28.4 118
8/20/20 0.07 28.4 118
8/12/20 0.03 73.1 114
7/16/20 0.095 42.6 112
7/13/20 0.04 56.8 110
7/1/20 0.07 73.1 114
6/25/20 0.09 36.5 112

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
6/17/20 0.045 26.9 114
6/10/20 0.075 56.8 110
6/3/20 0.06 42.6 118
5/26/20 0.05 46.5 114
5/11/20 0.11 42.6 117
4/15/20 0.04 73.1 117
4/9/20 0.08 64 116
3/31/20 0.045 28.4 116
3/25/20 0.03 51.2 120
3/18/20 0.045 51.2 112
3/11/20 0.035 32 119
3/4/20 0.06 64 114
2/28/20 0.065 32 117
2/21/20 0.05 36.5 114
2/17/20 0.04 39.3 114
1/29/20 0.03 85.3 114
1/20/20 0.04 28.4 114
1/14/20 0.045 64 117
1/7/20 0.025 24.3 121
Maximum Vibration 0.12 127
Number of Blasts 56
Mishak(15680 Glenmore Rd) in/sec Hz dBL
6/4/21 0.068 24 111
©Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
Appendix B
Vulcan Materials:Gold Hill Number:N3
Seismograph LOC:Vaughn Property carsTime
Seismograph GPS:35d29m41.00sN,80d19m15.50sW White Mini-Se.SN:17%
John Babcock(540-974-1029) sea.Tdt ,0.0200 W..
As Td99v:1264
Sample Rare:1024
Our.den:6.0 ascents
Pr Tn99an 0.50 Seceeds
OaM:2.Ox
vauo.:z0.
Peeks and Frequencies Graph Information
PPV Maximum:0.120 in/sec(0.3584 sec) Duration:-0.500 s To:5.000 s
Acoustic:112 dBL a 21.3 Hz(2.3389 sec) Acoustic Scala:126 dBL
:Radial:0.1201Nsac Q 84.011z(0.3584 sec) seismic Scala:0.20 in/sec(0.0501Nsecidiv)
'Vertical:0.0600 erlscc(rl 34.1 Hz(0.3340 sa('.l Time Intervals:1.00 sec
.Transverse:0.0900 in/sec Ca 36.51-1z(0.3672 sec)
A«elsrarion:0.108 g
Displacement:0.000591 in
Last Calibration Date:1015/2D20
Cal 1.02 OK,
.A
Cal 0.495 OK'
iI
Cal 0.490 OK
V
Cal 0.490 OK
-0.50 0.50 1.50 2.50 3.50 4.50
Particle Velocity Versus Frequency-USBM Limits(RI 8507,1980)
10 Radial 10 10 Transverse
1
:
! i
y
i
0.10 x x 0.10: 0.10 x
x
xxsSatx - - ax� x :.
xx x x
x xxx x
xx x#
x X' u x
i z x xl x
sits _. xxx
0.011 10 100 0.011 10 100 0.011 10 100
Frequency(Hz)
0 Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

Mishak(15680 Glenmore Road) Vulcan Materials Gold Hill
Appendix B
* butmto Event Report
Date7Tims Lang at 11:46.40 June 4,2021 Serial Number BA20197 V 10.72-8.17 BlaslMate III
Trigger Source Geo:0.020 in/s,Mic:115.0 dB(L) Battery Level 6.3 VOItS
Range Geo:1,250 inds Unit Calibration May 7,2021 by maternal
Record Time 7.0 sec at 1024 spa File Name V197JOC3.DSO
Post Event Notes
Notes Location Mishak(15660GIenmOr@Rd)
Vulcan Materials Gold Hill Ouarry Seismograph CPS.35d29m40.27sN.8Od19m08.02sW
Vulcan Materiels:Gold Hill
Mishack Deep Earth Logic John BabcO6(540-9741029)
USBM RI8507 And OSMRE
Extended Notes
Microphone Linear Weighting
PSPL 110.9 dB(L)at 2.007 sec
ZC Freq 2.7 Hz s 1
Channel Test Passed(Freq=19.7 Hz Amp=643 my)
Tran Vert Long
PPV 0.076 0.027 0.068 irds
ZC Freq 12 37 24 Hz 2:1
Time(Rel.to Trig) 0.316 0.289 0.164 sec
Peak Acceleration 0,041 0.023 0.043 g
Peak Displacement 0.001 0,000 DODO in
Sensor Check Passed Passed Passed 2 1
Frequency 7.4 7.7 7.5 Hz —
Overrvdng Ratio 3.8 3.5 3.3
0 0.5
b
7
e
0.1
B + °
o.o
1 ] a to 20 a0 lea�
Frequency(Hz)
Trans+ Van:x Long:Is
V
MIct. --- 0.0
—
I . i
Lone r '
a.D
Van 0.0
Than
0 1.0 2.0 3.0 4.0 &0 6.0 7.0
Time Scale:0.50secriy Amplitude Scale:Geo:0020 in/s/div Mic:0.001 psi(L)rdiv Sensor Check
Trigger=►
Printed:Jum 7,2021(V 1e.74) For nal0199542m6 xmark corporation
0 Deep Earth Logic,LLC 2021 Issue Date:09-Dec-20

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