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ASBESTOS FINAL AIR CLEARANCE REPORT
Project Details:
Project Location: 4926 Juniper Lane in Vail, Colorado 81657
Performed By: Seth Kisselman
Inspection Date: June 15, 2017
Report Date: June 19, 2017
Presented To:
Greg Sands
Resort Concepts
Prepared By:
Advanced Environmental Consulting, LLC
Colorado Consulting Firm#: 20874
7751 East 137th Avenue
Thornton, CO 80602
TABLE OF CONTENTS
1.0 INTRODUCTION
2.0 OBSERVATIONS AND SITE DESCRIPTION
3.0 FINAL VISUAL PROCEDURES
4.0 FINAL CLEARANCE AIR MONITORING AND SAMPLING
5.0 ANALYTICAL METHODOLOGY AND LABORATORY RESULTS
6.0 CONCLUSIONS
7.0 LIMITATIONS
List of Attachments
Attachment A: Pictures
Attachment B: Certifications
1.0 INTRODUCTION
Advanced Environmental Consulting, LLC (AEC) was retained to perform industrial hygiene services related to
post-asbestos abatement work area/containment visual and air monitoring services and, Phase Contrast Microscopy
(PCM) laboratory analysis at the above-referenced location.
Colorado Regulation No. 8 – Part B Section III.P, Clearing an asbestos abatement project “applies to areas of public
access where the amount of asbestos-containing material (ACM) that will be abated exceeds the trigger levels.”
2.0 OBSERVATIONS AND SITE DESCRIPTION
The asbestos air clearance was conducted on June 15, 2017 by Colorado Department of Public Health and
Environment (CDPHE) and Asbestos Hazard Emergency Response Act (AHERA) certified Air Monitoring
Specialist (AMS) Mr. Seth Kisselman (Certification Number 21329). AEC is a CDPHE certified Asbestos
Consulting Firm (Certification Number 20874).
The building is a single-family residential dwelling. AEC was responsible for consulting with the abatement
representative (Oswaldo), to ensure the abatement areas (kitchen) and materials (drywall) removed were understood
so that clearances could be properly performed.
3.0 FINAL VISUAL PROCEDURES
Upon completion of asbestos removal activities and with only critical barriers still in place, a final visual inspection
of the work area is required by the applicable regulations. A certified AMS must visually inspect each work area
for any dust or debris and behind critical barriers, to determine whether all dust and debris has been removed. 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.
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 prior to air monitoring collection.
4.0 FINAL CLEARANCE AIR MONITORING AND SAMPLING
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
successful completion of the final clearance air monitoring process may an asbestos abatement project be considered
complete, and teardown of the containment structure can commence.
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 sixteen liters per minute (16 LPM) for a period of approximately thirty-
one (31) 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 sample(s) were collected in each full containment work area(s) located at the site.
5.0 ANALYTICAL METHODOLOGY AND LABORATORY RESULTS
The AEC representative is trained in PCM laboratory analysis 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 (PAT) program.
The results of the final clearance air monitoring samples via PCM laboratory analysis confirm that the
concentrations of airborne fibers within each 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 31 Min 16.0 496 L 3.5 BDL
East 31 Min 16.0 496 L 5.5 0.005
South 31 Min 16.0 496 L 3.0 BDL
West 31 Min 16.0 496 L 4.5 BDL
Center 31 Min 16.0 496 L 4.5 BDL
6.0 CONCLUSIONS
AEC provided asbestos abatement clearance services at the above-referenced location. Air samples collected at the
above referenced sample locations were below the regulatory level of 0.010 f/cc. Therefore, the work areas are clean
and are ready for re-occupancy.
7.0 LIMITATIONS
This report describes the data collected and observations made by AEC during the final clearance sampling. 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 industrial hygiene support services. If there are any questions on this
asbestos final clearance report, please contact AEC by phone or email.
Respectfully Submitted,
Advanced environmental consulting
Seth Kisselman
Industrial Hygienist
ATTACHMENT A
PICTURES
ATTACHMENT B
CERTIFICATIONS