Document OLM8vXd8N0rxJMRkKeoaz9Rj
FILE NAME Powhatan PHN
DATE 1976 DOC PHN023
DOCUMENT DESCRIPTION Govt Inspection Reports
an
United States Department of the Interior
MINING ENFORCEMENT AND SAFETY ADMINISTRATION . 4800 FORBES AVENUE PITTSBURGH PENNSYLVANIA 15213
Memorandum
February 23 1976
To
: District
Manager Metal and Nonmetal Mine Health
Northeastern District
and Safety
From
Mining Engineer Metal and Nonmetal Mine
Northeastern District
Health and Safety
Subject
History of Asbestos Mining and Milling at Powhatan Mining
Company Baltimore County Maryland :
The Powhatan Mining Company Woodlawn Baltimore
founded in 1917 by Mr. Fred A. Mett
County Maryland was
mill employing four
The operation now consists of a
persons at the mentioned location and
a
Newdale North Carolina
quarry near
Mr. Mett became aware of the market for asbestos while serving in the
Army during World War 1. While the
prospected for asbestos and found
service and immediately after he
Hartford County Maryland The his original supply in Pylesville
variety
deposit was a fiber anthophyllite
The original use of the fibers
As the use of asbestos
was for filtration of acids and chemicals
fibers grew in varied
a good market for a special fiber in
industries Mr. Mett found
Dr. Gooch the two
the chemical field Working with a
developed a fiber for
Jused worldwide The asbestos used for
laboratory filters that is now
is imported from
the laboratory filters was tremolite
and
Africa
In 1930 the supply of anthophyllite
is now quarried and trucked from the was depleted in Maryland and the ore
Carolina Other amphiboles
company mine at Newdale North
blending
are purchased from different localities for
;
The trucked material is delivered to the mill in Baltimore and
in the building If the material has to be
stockpiled
end loader loads the primary hopper
crushed a 1-1 yard frontThe anthophyllite is shoveled
a 20 x 16 jaw crusher Materials that do
into
by bucket elevator to storage bins
not have to be
Materials that have
dried to be
are taken dried
are
REVOLUTION
REVOLUTION
REVOLUTION
BICENT
AN REVOLUTION BICENT BICENT
1776-1970 1776-1970
t.
2
Memo to District Manager from Mining Asbestos Mining and Milling Powhatan Engineer Subject
Mining Company
History of
chuted to a
blending of
dried
wheelbarrow and dumped on
materials is added to the
a steel plate anthophyllite
dryer Any
while it is
required
being
When drying is completed the product is shoveled
bucket elevator and
into a chute to the
placed in storage bins
is then transported to
rejected and returned
spin classifiers The course material is
to the impactor The usable
a cyclone which breaks the air
bagging area and the refuse
lock
The
fibers
product is sucked into are gravity fed to the
is for waste
processed fibrous state
Approximately twenty pounds of the fiber
two to three gallons of
is placed in a crock and
is then cooked with
hydrocloric acid poured over the material It
fibers
live steam until the impurities are
are then washed over a
removed The
placed in a
screen until all of the acid is
press to remove the water and then into
removed
elimination of all moisture It is then
a dryer for complete
the Gooch fiber
The finished
screened for long fiber A and
product is packaged predominantly in one-
pound cartons for the market
The
company conducts a struct health and
of these fibers
Dust
safety program in the production
collectors and adequate capturing hoods
on the property Employees wear
are abundant
clothing Clean shower
respirators and supplied washable work
bagging
and
Gooch
facilities are available operations are vacuumed daily
and An
used The mill eyewash station
deluge shower are in the immediate area where the
and
used Warning signs are posted
hydrocloric acid is
asbestos fiber
Annual
throughout the property for the hazards of
physicals including chest ray and
function are given for the employees
pulmonary
All stationary machinery is guarded handrails
extinguishers placed
provided where needed
motors and switchboxesstrlaatbeelgeidcalanldy throughout the mill and electrical
trained in current first aid
property grounded Employees are
fire
The
two
property asbestos
hfaisberbeen monitored for asbestos fiber and noise
surveys showed they were in compliance for
The last the TLV for
1776-1976
1776-1976
1776-19761776-1976
Memo to District Manager from Mining Engineer Subject Asbestos Mining and Milling Powhatan Mining Company
History of
The present market for their product is very low and the operation is only producing on a placed bases
CC F. J. Delimba
R. H.
PR H.
Files
Dickey
Hoffman
RHHoffman RHHoffman 2/17/76
Raymond H. Hoffman
Mine ID No 1800412
Date 2/18 & 20/76
Product
Page 1 of 4
Asbestos
Mine Name Powhatan Mining Company Mill
METHOD OF DETERMINATION
TYPE OF SAMPLE ANALYZED
Microprojector Counting
Midget Impinger (
)
X Fiber Counting
Total Airborne Dust
Name and Social | Occupation and Location
Security No.
Date
Time
Sampled
Sampling | Occupancy | Concentration | Percent TLV
Time
Time
Silica
min Spent
2/18/76
-
Frank McHenry
234-12-6430
Bagger
Mill
Frank McHenry
1. 234-12-6430
Bagger
Mill
8-8 am
30
60
1.1
9-9 am 30
60
1.5
10-10 30
60
0.83
11-11 30am 30
60
0.57
12-12 30
60
1.9
1-1 pm 30
60
0.94
2-2 pm 30
60
1.4
3-3 pm 30
60
1.2
5
2/20/76
8-8 am
30
669
9-9 am
30
669
10-10 30am 30
60
11-11 30
60
12-12 30pm 30
60
1-1 pm 30
60
2-2 pm 30
60
3-3 pm 30
60
1.1 1.4 0.35 0.39 0.05 0.50 1.0 0.39
TWA
Conc
1.06
Mine ID No 1800412
Date 2/18 & 19/76
Mine Name Powhatan Mining Company Mill
Product
AGwe SYA Asbestos
METHOD OF DETERMINATION
TYPE OF SAMPLE ANALYZED
Microprojector Counting Fiber Counting
Midget Impinger (
>
Total Airborne Dust
Name and Social
Security No.
Occupation and Location
Date
Time
Sampled
Sampling | Occupancy
Time
Time
min ) Spent
Concentration | Percent : TLV
Silica
t
= Eugene Myer 212-36-0659 _
Bagger
Mill
F
,
2/18/76
8-8 am 30
60
9-9 30 am 30
60
10-10 : 30am 30
60
11-11 30am 30
60
12-12 30pm 30
60
1-1 pm 30
60
2-2 pm ww
60
3-3 pm ww
60
0.12
0.53 0.60 0.25 3.0 0.08 0.26 0.28
5.00
2/20/76
as Eugene Myer
,212-36-0659
uo
Bagger
Mill
8-8 am 30
60
9-9 am 30
60
10-10 30
60
11-11 30am 30
60
12-12 30pm 30
60
1-1 pm 30
60
2-2 pm 30
60
3-3 pm 30
60
0.44 0.32 0.13 0.17 0.38 0.38 0.67 0.25
5.00
TWA Conc
v-
0.64
0.34
Mine ID No
1800412
Date 2/18 & 20/76
Product
sane vy ve
Asbestos
Mine Name Powhatan Mining Company Mill
METHOD OF DETERMINATION
Microprojector Counting Fiber Counting
TYPE OF SAMPLE ANALYZED
Midget Impinger (
)
Total Airborne Dust
Name and Social | Occupation and Location
Security No.
Date
Time
Sampled
Sampling | Occupancy Concentration | Percent TLV
- Time
Time
Silica
min
Spent
t 2/18/76
_--~ John Carter
230-10-1708
Maintenance
All over mill
8-8 am
30
60
9-9 am 30
60
10-10 30am 30
60
0.47 0.12 0.80
11-11 30
60
0.14
!
12-12 30pm 30
60
0.06
1-1 pm 30
60
0.13
;
2-2 pm 30
60
0.24
:
3-3 30 pm 30
60
0.29
5.00
_: John Carter
37
Maintenance
2/20/76
8-8 am
30
60
9-9 am 30
60
10-10 30am 30
60
11-11 30
60
12-12 30pm 30
60
1-1 pm 30
60
2-2 pm 30
60
3-3 30 pm 30
60
0.30 0.234 0.27 2.6 0.13 0.20 0.57 0.34
5.00
TWA Conc
0.28
.
0.58
Mine ID No 1800412
Date 2/18 & 19/76
Product
raze - ul 4
Asbestos
Mine Name Powhatan Mining Company Mill
METHOD OF DETERMINATION
TYPE OF SAMPLE ANALYZED
Microprojector Counting Fiber Counting
Midget Impinger (
)
Total Airborne Dust
| | Name and Social Occupation and Location Date Sampling Occupancy Concentration Percent TLV TCoWnAd
Security No.
Time
Time
Time
Silica
Sampled min Spent
\
2/18/76
_- John Bright
pa)
215-12-1235
Packer Gooch Plant
8-8 30 am 30
60
9-9 am 30
60
10-10 30am 30
60
11-11 30
60
12-12 30pm 30
60
1-1 pm 30
60
2-2 pm 30
60
3-3 pm 30
60
0.04 0.24 0.57 0.06 0.19 0.28 0.31 0.08
5.00
10.22
2/20/76
John Bright
215-12-1235
Packer Gooch Plant
8-8 am 30
60
9-9 30 am 30
60
10-10 30am 30
60
11-11 30
60
12-12 30
60
1-1 pm 30
60
2-2 pm 30
60
3-3 pm 30
60
0.31 -0.21 0.18 0.51 0.03 0.17 0.23 0.13
\.
5.00
0.22
One ID No 1800412 ne Name : Powhatan Mining Co. Mill
METHOD OF DETERMINATION -
Ray Diffraction
Other_
Date 2/18/76
Product
TYPE OF SAMPLE ANALYZED
- Welding Fume
Total Airborne Dust
Respirable Airborne Dust
ime and Social
Security No.
Occupation and Location
Date
Sampled
Sampling
Time
Min )
Contaminant
Contaminant
Amount
Sample
Weight mg
| TLV
TWA
mCond
mg
_ Prank McHenry
134-12-6430
Bagger
Mill
2/18/76
480
Silica
4.2
0.22
1.61 0.2
Eugene Myer 12-36-0659
ohn Bright 15-12-1235
----John Carter 30-10-1708
Bagger
Mill
Gooch Plant Gooch Mill
Maintenance
Mill
2/18/76
480
2/18/76
480
Silica
LY
Silica
7.6 8.4
0.16
1.04 | 0.2
0.04
0.96 0.0
2/18/76
480
Silica
N.D
0.44
5.00 | 0.5
\
\
* N.D. Not petected
.
Interference from Anthophyllite
Based on ait of detection sill
exposure is below the stene
TABLE - ANALYSIS OF DUST SAMPLES COLLECTED 2/18/76
MILL Powhatan Mining Company Mill COLLECTED BY Raymond H. Hoffman
,
COMPANY Powhatan Mining Company
STATE Maryland
SUBDISTRICT OFFICE Pittsburgh Pennsylvania DATE REC'D 2/27/76
Sample
Number
001400
"'
0402
001403 001404
Laboratory
Analyses
Number
Sample Type and Location
Free Silica
_
Other
6-00998 6-00999
Respirable dust - bagger
Respirable dust - Gooch Mill
Gooch Plant
Quartz - 4.2 Quartz - 8.4
6-01000 6-01001
Respirable dust - Mill maintenance - N.D.
Respirable dust - bagger
Quartz - 7.6
N.D. Not Detected Interference from Anthophyllite
Based on limit of detection silica exposure is below the standard
3/8/76
SIGNED
:
Denver Technical Support Center