Document 5L1zn03JEmxEvRggE3LEkMXpz
John A. Jurgiel & Associates, Inc.
Occupational >lKeallh and ^Safely Consultant*
December 30, 1985
2C32 CONCOURSE OrtIVE SY. LOUIS. MISSOURI *3146 13 I 4| 5 67-7 486
Mr. Jim Grizzle Safety Supervisor Shell Oil Company Post Office Box 262 Wood River, Illinois 62095
Dear Jim:
Bill Cunningham has pointed out a calculation error in my December 17, 1985, summary of the CCU-2 shutdown. The error was in the- calculation of the TLV for .Quartz (silica) during sandblasting operations in the regenerator. Enclosed is my corrected report reflecting table and narrative changes.
I am sorry for any inconvenience the December 17 report may have caused.
cc: Bill Cunningham [Shell Oil]
Enclosure DNN/kn
LAM 023922
ABS-007104
CCU-2 INDUSTRIAL HYGIENE PROJECT SUMMARY
\
December 30, 1985
By John A. Jurgiel & Associates
2092 Concourse Drive St. Louis, Missouri 63146
LAM 023923
ABS-007105
RESULTS OF AIR MONITORING DURING CCU-2 TURNAROUND
SAMPLE NO. -
TIME
ON - OFF
LOCATION
CONTAMINANT/UNITS \
Removal of refractory from Regenerator, September 29,
RESULTS 1985.
CCU2-1 0820-1354
Downwind of 'Super Sucker'
Asbestos f/cc
N.D.
CCU2-2 0825-1354
Next to conex box
Asbestos f/cc
0.013
CCU2-3 0831-1350
Outside of 60" manway
Asbestos f/cc
0.0092
CCU2-4 0834-1349
Inside 'Regen' under ladder at 60" manway
Asbestos f/cc
0.782
CCU2-5 1157-1349
Inside 1 Regen' on work platform
Asbestos f/cc
1.77
Removal of refractory from Regenerator, October 1, 1985
CCU2-6 0941-13.58
Downwind from super sucker. .
Asbestos f/cc
N.D,
CCU2-7 0943-1357
Next to conex box
Asbestos f/cc
0.015
CCU2-8 0946-1354
Outside 60" manway
Asbestos f/cc
0.006
CCU2-9 0949-1347
Inside 'regen' under ladder at 60" manway
Asbestos f/cc
2.99
CCU2-10 0949-1347
Inside 'regen' on operator platform
Asbestos f/cc
3.05
Manual removal of refractory from Regenerator with air movers on, October 10, 1985.
CCU2-11
Outside area sample
Asbestos f/cc
at outlet to air mover
on level 13
0.118
TL' 2.0
f M 11 It
.2.0
II 11 M It
11
LAM 023924
ABS-007106 4
/
RESULTS OF AIR MONITORING DURING CCU-2 TURNAROUND
continued
SAMPLE NO. TIME
ON - OFF
CCU2-12
LOCATION
CONTAMINANT/UNITS
\
Outside area sample downwind of air mover on level 13
Asbestos f/cc
RESULTS 0.031
CCU2-13 1414-1543
Personal sample on Louis Finley
Asbestos f/cc
1.28
CCU2-14 1418-1543
Area sample in bottom of 'regen1
Asbestos f/cc
1.05
Manual removal of refractory from Regenerator with air movers
on, October 11, 1985 .
CCU2-15 1947-2150
Personal sample on Don Chappel1
Asbestos f/cc
.2.12
CCU2-16 1949-2150
Area sample in bottom of 'regen'
Asbestos f/cc
3.23
Sandblasting in Regenerator with air movers on, October 14, 1985.
TLV
II
2.0
tl
If It
CCU2-18 1356-1545
Outside 60" manway of 'regen1
Asbestos f/cc
0.02
2.0
Less than (<) values indicated that contaminant concentrations were below the reliable level of quantification of the method of analysis.
The TLV for Dust that contains >1% quartz is calculated as follows: TLV for Total Dust=(30 mg/M")/(% quartz O)
This TLV is recommended by the ACGIH in their Documentation for Threshold Limit Values for total dust samples containing Quartz.
LAM 023925
-5 -
ABS-007107