NEGATIVE EXPOSURE ASSESSMENT
for
DRILLING HOLES IN ASBESTOS-CONTAINING FLOORS
Holes up to 1-inch in diameter
For use in AT&T buildings in authorized States only
For use only by authorized contractors and AT&T employees
This form may not be altered except as authorized by AT&T
REVISED May 9, 2013
VALID UNTIL May 9, 2014
A. Description of current job
1. The procedure used for installation of equipment on asbestos-containing resilient floor coverings includes drilling holes
in the coverings, using shaving cream to control debris and fiber release. This NEA is applicable to both vinyl floor tile
and sheet vinyl/rolled goods such as linoleum with asbestos backing material.
2. Type and amount of material - Work will be performed on 9" x 9" and/or 12" x 12" resilient floor tile and/or
sheet/rolled vinyl floor covering such as linoleum , installed on a concrete floor, and on the associated adhesive mastic.
3. Type and percent asbestos - The floor covering is presumed to contain asbestos and no samples have been taken for
analysis.
4. Engineering controls - No engineering controls are required.
5. Worker's training and experience - Workers have completed a 2-hour Awareness Training course, plus training in use
of the drilling procedure. This training included "hands-on" exercises using non-asbestos floor coverings similar to the
asbestos-containing material on which the work will be performed.
6. Class of work - Class III work - Maintenance and repair on resilient floor covering.
B. Initial Exposure Assessment (IEA) - Resilient Floor Tile Drilling
1. Initial Exposure Assessment (IEA) was completed on October 23, 1996
a. Name of person performing IEA: Andrew F. Oberta, MPH, CIH, The Environmental Consultancy, Austin, TX, a
licensed asbestos consultant (TDH License No. 10-5430).
b. Was a project design completed for this project? Yes. Test procedures and air sampling procedures were prepared,
and a drawing of the test facility was provided.
c. Were engineering controls implemented as designed? Yes.
d. Results of an 8-hr TWA: No 8-hr TWA exposures were calculated. The sample results in Table 1a are for the actual
duration of sampling, which ranged from 20 to 230 minutes (average = 62). 8-hr TWA exposures would be less
than the values in Table 1, all of which are below the PEL of 0.1 fibers/cc.
e. Results of a 30-minute STEL: All of the EL samples are below the excursion limit of 1.0 fibers/cc.
f. How were these samples analyzed? Phase Contrast Microscopy using NIOSH Method 7400.
g. Are the results less than the PEL and the EL? Yes. Also, the 95% UCL is below the PEL and EL.
h. Were the samples taken representative of all operations which will take place during the work? Yes, provided that
the workers receive training in using the procedure, that they use similar equipment and materials, and that work
is limited to resilient floor tile.
Table 1a. Summary of Personal Samples for hole drilling on floor tile
Collected October 10, 17 and 23, 1996
No. of tests ...................................
No. of samples .............................
Range, fibers/cc ...........................
Average, fibers/cc ........................
95% UCL, fibers/cc .....................
Drilling NEA Form – Page 1 of 3
PEL samples
3
8
0.0053 – 0.0114
0.008
0.012
EL samples
3
16
0.0237 - 0.098
0.033
0.062
Drilling NEA Form - Holes up to 1-inch in diameter
Page 2 of 3
Make sure you have the correct form !!!!!
Form Expires May 9, 2014
2. Annual Updates have been conducted for drilling holes in floor tile. The most recent is summarized below.
a. Name of person performing update: Ken Garza, Gobbell Hays Partners, Inc.
b. Was a project design completed for this project? A test plan and air sampling strategy were prepared.
c. Were engineering controls implemented as designed? No engineering controls were necessary, based on the Initial
Exposure Assessment and previous updates.
d. Results of an 8-hr TWA: No 8-hr TWA exposures were calculated. The sample result below is for the actual
duration of sampling, 90 minutes. 8-hr TWA exposures would be less than this value.
e. Results of the EL: All of the EL sample results are less than the excursion limit of 1.0 f/cc.
f. How were these samples analyzed? Phase Contrast Microscopy using OSHA ID 160.
g. Are the results less than the PEL and the EL? Yes. Also, the 95% UCL is less than the PEL and EL.
h. Were the samples taken representative of all operations which will take place during the work? Yes, provided that
the workers receive training in using the procedure, that they use similar equipment and materials, and that work is
limited to resilient floor tile.
See Table 2a below.
C. Initial Exposure Assessment (IEA) - Resilient Sheet Vinyl Flooring Drilling (Linoleum)
1. Initial Exposure Assessment (IEA) was completed on September 11 and 12, 2003
a. Name of person performing IEA: Peter D. Cappel, Senior Industrial Hygienist, Gobbell Hays Partners, Inc.
b. Was a project design completed for this project? Yes. Test procedures and air sampling procedures were prepared.
c. Were engineering controls implemented as designed? Yes.
d. Results of an 8-hr TWA: See Table 1b. All air samples collected were below the OSHA Permissible Exposure Limit
of 0.1 fibers/cc.
e. Results of a 30-minute EL: See Table 1b. All EL air samples collected were below the OSHA Excursion Limit of
1.0 fibers/cc.
f. How were these samples analyzed? Phase Contrast Microscopy
g. Are the results less than the PEL and the EL? Yes. In addition, the 95% UCL is below the PEL and EL.
h. Were the samples taken representative of all operations which will take place during the work? Yes,
provided that the workers receive training in using the procedure, that they use similar equipment and
materials, and that work is limited to resilient sheet vinyl flooring.
Table 1b. Summary of Personal Samples for hole drilling on sheet vinyl flooring
Collected September 11 and 12, 2003
PEL samples
EL samples
No. of samples
3
9
Range, fibers/cc
<0.016
<0.044
Average, fibers/cc
<0.017
<0.047
95% UCL, fibers/cc
0.023
0.099
2. Annual Updates have been conducted for drilling holes in sheet vinyl flooring. The most recent is summarized below.
a. Name of person performing update: Ken Garza, Gobbell Hays Partners, Inc.
b. Was a project design completed for this project? A test plan and air sampling strategy were prepared.
c. Were engineering controls implemented as designed? No engineering controls were necessary, based on the Initial
Exposure Assessment.
d. Results of an 8-hr TWA: No 8-hr TWA exposures were calculated. The sample result below is for the actual
duration of sampling, 90 minutes. 8-hr TWA exposures would be less than this value.
e. Results of the EL: All of the EL sample results are less than the excursion limit of 1.0 f/cc.
f. How were these samples analyzed? Phase Contrast Microscopy using OSHA ID 160.
g. Are the results less than the PEL and the EL? Yes. Also, the 95% UCL is less than the PEL and EL.
h. Were the samples taken representative of all operations which will take place during the work? Yes, provided that
the workers receive training in using the procedure, that they use similar equipment and materials, and that work is
limited to resilient sheet vinyl flooring.
See Table 2b below.
DRILLING NEA Form - Holes up to 1-inch in diameter
Page 3 of 3
Make sure you have the correct form !!!!!
Form Expires May 9, 2014
Table 2a. Summary of Personal Samples for hole drilling
on floor tile
Collected May 9, 2013*
No. of samples
Range, fibers/cc
Average, fibers/cc
95% UCL, fibers/cc
PEL samples
1
<0.014
0.007
0.010
Table 2b. Summary of Personal Samples for hole drilling
on sheet vinyl flooring
Collected May 9, 2013*
EL samples
3
<0.045
0.023
0.034
No. of samples
Range, fibers/cc
Average, fibers/cc
95% UCL, fibers/cc
PEL samples
1
<0.015
0.0075
0.011
EL samples
3
<0.044
0.022
0.033
*Employer is responsible for obtaining current (within 12 months) air sampling data
This project was completed on (check one):
Floor Tile
Project/Job Information
Con./Project/TEO/Job #
1. Description of work: Floor covering drilling
Date(s) Work Performed:
Sheet Vinyl Flooring
This work will be performed at__________________________________________________________
CLLI
City
State
by employees of_____________________________________________________________________
Company that you work for
D. Certification of Negative Exposure Assessment
Based on the information herein, worker exposures during the current job described above are not expected to exceed the
Permissible Exposure Limits, based on comparison of the current job to the Initial Exposure Assessment and annual
updates described in Section B.
Name:__________________________________Signature:____________________________Date:_________
PRINT name of competent person
Last 4 digits of SS#___________________________
Phone Number:
Installer_____________________________[PRINT name]
ID (Last 4 digits of SS#)_____________________
Installer_____________________________[PRINT name]
ID (Last 4 digits of SS#)_____________________
E-Mail or Fax or Mail Last Page
of completed NEA form to:
NEA Management Center
c/o TITAN Engineering
nea@titanengineering.com
Fax: 512-250-2940
Phone: 512-250-2600
Return This Page Only!
DO NOT SEND DEBRIS TO THIS ADDRESS