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May 18, 2014
Mike Dowling
C.A.E. & Abatement
9850 Federal Boulevard, Unit 314
Federal Heights, CO 80260
Subject: Industrial Hygiene Support Services Related to Asbestos Final Clearance Air Sampling and Report
Dear Mr. Dowling:
Advanced Environmental Consulting, LLC (AEC) was retained by C.A.E. & Abatement (CAE), to perform
industrial hygiene services related to post-asbestos abatement work area/containment visual and air monitoring
services. This report is specific to the events conducted on May 16, 2014 located at 174 Gore Creek Drive, Unit #516
in Vail, Colorado. AEC, a Colorado Department of Public Health and Environment (CDPHE) certified Asbestos
Consulting Firm (#20874), was responsible for consulting with the Professional representative, to ensure the
abatement areas and materials removed were understood so that clearances could be properly performed.
Final Visual Clearance
Upon completion of asbestos removal activities, a final visual inspection of the work area is required by the
applicable regulations. A certified Air Monitoring Specialist (AMS) must visually inspect the work area for any
dust or debris remaining in the area. If the inspector notes any such dust or debris, the abatement contractor is
required to re-clean the work area until such time that the inspecting AMS does not observe any dust or debris in
the work area.
Mr. Kris Wilson conducted the final visual inspection of the site. Mr. Wilson is certified (#4663) as an Asbestos
Inspector and AMS as specified by the Asbestos Hazard Emergency Response Act (AHERA) and the CDPHE. It
was determined that the abatement contractor had properly cleaned the work area completely of all dust and debris.
The inspecting AMS required no further cleaning.
Final Clearance Air Monitoring and Sampling Methodology
Final clearance air samples must be collected from the work area after completion of a final visual inspection and
prior to teardown of the containment structure. Analysis of each these samples must show airborne asbestos fiber
concentrations of less than or equal to 0.010 f/cc. If concentrations exceed this limit, the abatement contractor must
re-clean the work area and a second set of final clearance air samples must be collected and analyzed. This process
is repeated until the analytical results of the final clearance air samples meet the regulatory standard. Only upon
successfully completion of the final clearance air monitoring process may an asbestos abatement project be
considered complete, and teardown of the containment structure can commence. Mr. Wilson completed the final
clearance air sampling.
Final clearance air samples were collected using constant flow high-volume air sampling pumps, 25 mm air
sampling cassettes, flexible tubing and adjustable sampling stands. The sampling cassettes were attached to one end
of the flexible tubing and placed on the stands approximately forty-eight (48) inches above the floor. The opposite
ends of the flexible tubing were attached to the air sampling pumps. The PCM sample pumps were activated and
operated at a flow rate of approximately fifteen liters per minute (15 LPM) for a period of approximately thirty-
five (35) minutes. Aggressive air sampling techniques (i.e. one-horse powered leaf blower for five minutes per 1,000
square feet and a fan placed at a forty-five degree angle toward the ceiling per 10,0000 square feet) as described in
40 CFR Part 763, Appendix A to Subpart E, were utilized throughout the sample collection process. Upon
completion of the final clearance air sampling, labels containing sample identification numbers, sample location,
pump flow rate, and total sample time were applied to each sampling cassette.
Per the applicable regulations, based on the quantity of ACM removed during the abatement project, five (5) final
clearance air samples were collected in the full containment work area located at the site.
Analytical Methodology and Laboratory results
The AEC representative is trained in Phase Contrast Microscopy by the National Institute of Occupational Safety
and Health (NIOSH) 582 Equivalent Course and successfully participates in the American Industrial Hygiene
Association (AIHA) Proficiency Analytical Testing Program (PAT).
The results of the laboratory analysis of the final clearance air monitoring samples confirm that the concentrations
of airborne fibers within the work area were below the regulatory limit of 0.010 f/cc. Results below the detection
limit are listed as BDL.
Sample Location Total Time Liter Flow Volume Number of Fibers Fibers/cc
North 35 Min 15.8 540 L 4.0 BDL
East 35 Min 15.8 540 L 3.5 BDL
Center 35 Min 15.8 540 L 2.5 BDL
West 35 Min 15.8 540 L 5.5 BDL
South 35 Min 15.8 540 L 4.5 BDL
Conclusions
AEC provided asbestos abatement clearance services in the building located 174 Gore Creek Drive, Unit #516 in
Vail, Colorado on May 16, 2014. Air samples were collected at the above referenced location until all samples were
below the regulatory level of 0.010 f/cc. Therefore, the work area was clean upon completion of the abatement project
and is ready for re-occupancy.
Limitations
This report describes the data collected and observations made by AEC during the final clearance sampling in the
above referenced building. AEC represents that its services were performed within the limits prescribed by applicable
regulations, within scope of work as approved by the EPA and the State of Colorado and in a manner consistent
with the level of care and skill ordinarily exercised by other professional consultants under similar circumstances.
AEC accepts no responsibility for data collected, the recommendations made or expressed to the client, and/or other
commitments made by persons or firms other than AEC. No other representation is made to the client, expressed or
implied, and no warranty or guarantee is included or intended.
Thank you for the opportunity to provide CAE industrial hygiene support services. If you have any questions on
this asbestos final clearance report, please contact me at your earliest convenience.
Respectfully Submitted,
Advanced environmental consulting
Kris Wilson
Industrial Hygienist
Attachments
ATTACHMENT A
CERTIFICATIONS