Final Visual Inspection and Air Monitoring Report Asbestos Abatement Activities 804 Chipeta Road Montrose, Colorado.

Transcription

1 Final Visual Inspection and Air Monitoring Report Asbestos Abatement Activities 804 Chipeta Road Montrose, Colorado November 21, 2016

2 Final Visual Inspection and Air Monitoring Report Asbestos Abatement Activities 804 Chipeta Road Montrose, Colorado November 21, 2016 Prepared for: Mr. Mark Armstrong Facilities Manager City of Montrose 433 South 1 st Street Montrose, CO Prepared by: Travis Brophy, APCD #13477 Air Monitoring Specialist Reviewed by: Faron Compton, APCD #4166 Air Monitoring Specialist Submitted by Grande River Environmental, LLC Clifton, Colorado (970) /21/16 i

3 TABLE OF CONTENTS 1 INTRODUCTION Final Clearance Air Monitoring Sampling Air Sampling Summary INSPECTION AND AIR MONITORING RESULTS CONCLUSIONS LIMITATIONS... 2 LIST OF APPENDICES Appendix A Asbestos Abatement Final Visual Inspection/Clearance Air Monitoring Form PCM Clearance Air Sampling Record Appendix B PCM Sample Analytical Results Appendix C Air Monitoring Specialist Certifications LIST OF TABLES Table 1 Clearance Air Monitoring Results 11/21/16 ii

4 Acronyms and Abbreviations ACM AHERA AIHA CDPHE EPA GRE HSE/NPL lpm MAAL mm NESHAP NIOSH NVLAP PCM asbestos-containing material Asbestos Hazard Emergency Response Act American Industrial Hygiene Association Colorado Department of Public Health and Environment Environmental Protection Agency Grande River Environmental, LLC Health & Safety Executive / National Physical Laboratory liters per minute maximum allowable asbestos level millimeter National Emission Standards for Hazardous Air Pollutants National Institute of Occupational Safety and Health National Voluntary Laboratory Accreditation Program Phase Contrast Microscopy 11/21/16 iii

5 EXECUTIVE SUMMARY Grande River Environmental, LLC (GRE) provided project management and air-monitoring services for the City of Montrose at the residential property located at 804 Chipeta Road in Montrose, Colorado. Work was performed in conjunction with removal of asbestos-containing materials from the residential structure. Asbestos removal, as part of a scheduled demolition of the buildings, was completed by Valley Disaster Restoration and Construction (Valley) of Montrose, Colorado. Valley is a Colorado Department of Public Health and Environment (CDPHE) licensed asbestos removal contractor. GRE s services included final visual inspections and clearance air monitoring as required in the abatement areas. Upon completion of a visual inspection of containment after asbestos removal, GRE collected final clearance air samples and released the work area when laboratory results indicated airborne fiber concentrations were within acceptable limits. Based on GRE s observations on air monitoring results, asbestos removal was completed in accordance with applicable federal, state and local regulations. At project completion, airmonitoring results indicated that concentrations of airborne asbestos fibers within the established containment areas were below the level of 0.01 fibers per cubic centimeter (f/cc) of air as defined in CDPHE Regulation No /21/16 iv

6 Final Visual Inspection and Air Monitoring Report Asbestos Abatement Activities 804 Chipeta Road Montrose, Colorado 1 INTRODUCTION Grande River Environmental, LLC (GRE) was contracted by the City of Montrose to provide final visual inspections and clearance air monitoring as required in the abatement areas at the residential property located at 804 Chipeta Road in Montrose, Colorado. Friable and non-friable asbestos-containing materials (ACM) were removed from the building prior to a planned demolition of the structure in accordance with the National Emission Standards for Hazardous Air Pollutants (NESHAP) and the CDPHE Regulation 8 Asbestos Requirements (Regulation 8). Asbestos removal was completed by Valley Disaster Restoration and Construction (Valley) of Montrose, Colorado. Valley is a CDPHE licensed asbestos removal contractor. 2 Final Clearance Air Monitoring Sampling Air samples were collected on 3-piece 25-millimeter mixed-cellulose ester membrane filters (0.8 micron pore size) designed for phase-contrast microscopy (PCM) analysis. The filters were preassembled by the manufacturer in conductive, three-stage cassettes with extension cowls. Rates were recorded at the beginning and at the end of the sampling period using a rotometer calibrated with a Drycal primary flow calibrator. Air samples were collected on open-faced cassettes that were positioned at breathing zone height (approximately five feet above the floor) with the exposed portion of the cassette facing downward. Asbestos air monitoring records were completed at the site each day that air samples were collected. These records are designed to be the primary working document, containing most information about air sampling activities and are attached to this letter. Analysis of air monitoring samples under PCM was performed by Grande River Environmental Consultants in accordance with the NIOSH 7400 method. The method may be found in the NIOSH Manual of Analytical Methods. PCM samples are reported as fibers per cubic centimeter of air sampled (f/cc). Acceptable clearance air samples are those at or below 0.01 f/cc for all PCM analyses. Regulation 8, Part B, Section III.P.3.b explains the Colorado requirements for air sampling and acceptable concentrations. 11/21/16

7 2.1 Air Sampling Summary The following summaries in Table 1 provide an overview of air monitoring conducted by GRE for the work area. Additional information such as final clearance monitoring worksheets and daily air sampling records are included in Appendix A and Appendix B, respectively. In accordance with CDPHE regulations the materials form the out building required only a visual inspection. TABLE 1 CLEARANCE AIR MONITORING RESULTS 804 CHIPETA ROAD CLEARANCE AIR MONITORING RESULTS Sample No. Date Sample Description/Location Analytical Result (f/cc) /15/16 Trip Blank /15/16 Field Blank /15/16 Kitchen Center /15/16 Kitchen NE Corner /15/16 Kitchen SE Corner /15/16 Kitchen South /15/16 Kitchen East f/cc = fibers per cubic centimeter of air 3 INSPECTION AND AIR MONITORING RESULTS The work area abated was cleared for re-occupancy subsequent to final visual inspection and clearance air monitoring. Results of final clearance sampling were at or below the EPA monitoring guideline of 0.01 fibers per cubic centimeter of air for PCM analyses. A visual inspection of the out building identified that all materials were removed in accordance to applicable regulations prior to demolition. 4 CONCLUSIONS Based on visual inspections and final clearance air monitoring results, the work area passed the clearance level of 0.01 fibers per cubic centimeter of air for PCM analyses as set by the USEPA and the CDPHE. At project completion, air-monitoring results indicated that concentrations of airborne fibers were less than the concentration recommended by the CDPHE for re-occupancy of the abated area. 5 LIMITATIONS GRE cannot document or comment on all day-to-day activities and events with respect to compliance with regulations and specifications. However, based on inspections conducted during asbestos removal operations, work appeared to conform to the specifications and applicable regulations. 11/21/16

8 APPENDIX A Asbestos Abatement Final Visual Inspection/Clearance Air Monitoring Form PCM Clearance Air Sampling Record 11/21/16

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11 APPENDIX B PCM Sample Analytical Results 11/21/16

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13 APPENDIX C Air Monitoring Specialist Certifications 11/21/16

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