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HomeMy WebLinkAboutair clearance report.pdf \IrraJi1e4 Favionsmihil Final Air Clearance For the Subject Property 508 E. Lionshead Cir. #205. Vail, CO 81657 � E iIWO I� ae'+ L. �I .._. IIP _ I �l ^ Report Date: 11/16/18 Inspection Date and Testing Date: 11/23/18 Job File # 18-1134 Prepared by: Billy Huff Colorado Certified Asbestos Building Inspector, 17831 Air Monitoring Special Mold Inspector and Assessor Versatile Environmental LLC Page 1 649 Independence St. Lakewood, CO 80215 720-234-5010 billy@versaenv.corn 0 Versatile Environmental LLC 2018 RE: Final Air Clearance: 508 E. Lionshead Cir. #205.Vail, CO 81657 INTRODUCTION As requested, on November 23`d, 2018, Versatile Environmental, LLC (VE)performed a final air clearance for the asbestos abatement project at the above referenced address. This is not a permitted project for the abatement of asbestos containing material regulated by the Colorado Department of Public Health and Environment(CDPHE). SUMMARY This project is clearance for a Minor Spill cleanup. A total of 17 SF of gypsum drywall with asbestos containing surface texture was removed. All abatement activities were conducted within a secondary containment (enclosure). In addition, negative pressure air filtration units equipped with HEPA filters was installed within the containment and exhausted filtered air from the interior of the work area to the exterior. The units operated continuously from the time of barrier construction throughout the acceptable final clearance method. Versatile Environmental, LLC conducted a post abatement visual inspection and final air clearance following the removal of the asbestos containing materials. Final clearance activities were performed in accordance with the Environmental Protection Agency (EPA) and Colorado Department of Public Health and Environment (CDPHE) regulations. Final clearance activities were conducted by a CDPHE certified Air Monitoring Specialist (AMS). Removal and disposal of the ACM was performed by Advantage Environmental FIELD ACTIVITIES Visual Inspection Prior to collecting air samples for clearance a post abatement visual inspection was conducted to verify the asbestos containing material was removed as specified and that the containment was free from visible dust and debris. With only critical barriers in place and the HEPA air filtration units still in operation,the air monitoring specialist(AMS) conducted a walk-through inspection of the regulated work area. Careful examinations of all areas within the containment where debris and water could accumulate and be concealed,were thoroughly inspected. If any area had visible dust or debris,the contractor was required to perform the necessary re-cleaning until the area met the visual criteria. Once the containment met the visual criteria final air clearance was performed. Aggressive Method Once the containment met the visual criteria the next step in final clearance was performed. Final air clearance sampling was conducted using aggressive techniques as outlined in Appendix A of the EPA Asbestos Hazard Emergency Response Act(AHERA)regulation(40 CFR Part 763),and as referenced in CDPHE Reg.No. 8 Part B Asbestos. Aggressive sampling consists of agitating the air using a leaf blower five(5)minutes for every 1,000 square feet of floor space and one(1)stationary box fan per 10,000 cubic feet of volume in containment. Air Sampling Following the aggressive protocol activities,five(5)air samples were then collected throughout the containment using variable high volume pumps. Flow rates of each pump were established and checked with a calibrated flow meter before and after the collection of each sample using a rotameter(secondary standard)traceable to a primary ' standard. Air samples were collected by drawing air at a rate of 15.4 liters per minute(LPM)through 25mm mixed cellulose ester membrane filter,housed in three-piece cassettes and equipped with 50mm electrically conductive extension cowls. A pre and post calibration of each sample pump was documented and an average flow rate was calculated and used in the final analysis of each sample collected. Calculations used in the final analysis combines the average flow rate(LPM),the total sample time and the volume of air collected. PCM Analysis All air samples collected were analyzed by Air Quality Analysis, LLC using the Phase Contrast Microscopy(PCM) NIOSH 7400 Method. Samples were analyzed for airborne fibers using a positive Phase-Contrast microscope Versatile Environmental LLC Page 2 649 Independence St. Lakewood, CO 80215 720-234-5010 billy@versaenv.com © Versatile Environmental LLC 2018 equipped with a Walton-Beckett graticule(type G-22 for"A counting Rules"). Only fibers greater than 5 microns in length with a length-width (aspect) ratio equal to or greater than 3:1 were counted. The resulting concentrations were expressed in terms of total fibers per cubic centimeter of air(f/cc). Final Clearance Criteria An abatement action is considered complete when the results of samples collected within the abatement work area and analyzed by PCM using the NIOSH Method 7400 show that the concentration of fibers for each of the five samples collected is equal to or less than 0.01 f/cc. The is the level the EPA and the Air Quality Control Commission(CDPHE)requires all samples to be equal to or less than in order to have an area released to the public. All final air samples collected for this project met the clearance criteria, and the containment can be dismantled and the area returned for normal occupancy. CONCLUSION IIIIIW Summary of Asbestos Air Monitoring -11111111 Total Average Volume Sample ID Sample Location Minutes Flow (L) Result(f/cc) Rate 205-1 East End 43 15.4 662 <.005 205-2 East Half 43 15.4 662 <.005 205-3 Center 43 15.4 662 <.005 205-4 West Half 43 15.4 662 <.005 205-5 West End 43 15.4 662 <.005 B1 Field Blank N/A N/A N/A N/A B2 Field Blank N/A N/A N/A N/A Based on visual inspections;documentation review; and final air sample results; it is the professional opinion of Versatile Environmental,LLC,that the air quality within the regulated area following the asbestos abatement activities is in compliance with all regulatory and industry standards. Versatile Environmental,LLC assumes no liability for any loss, injury, and or claim for damages arising directly or indirectly from any use or reliance on this report or the opinions expressed herein. This report is limited only to the samples collected and represent the air quality within the regulated area of the residence on the date previously referenced. This report was prepared by Versatile Environmental,LLC at the request of and for the sole benefit of Advantage Environmental. The material in this report reflects the best judgment of Versatile Environmental,LLC,in light of the information that was available at the time of preparation.This report is the exclusive property of Advantage Environmental. The final air clearance sampling was performed using regulatory procedures and a level of diligence exercised by professional consultants performing similar services. Should you have any questions concerning this project,please do not hesitate to contact our office at(720)234- 5010.Thank you for the opportunity to provide this service to you. Versatile Environmental LLC Page 3 649 Independence St. Lakewood, CO 80215 720-234-5010 billy@versaenv.corn © Versatile Environmental LLC 2018 Respectfully Submitted, b 4 qi Billy Huff Versatile Environmental,LLC CDPHE Certified AMS#17831 Appendix A Lab Results Versatile Environmental LLC Page 4 649 Independence St. Lakewood, CO 80215 720-234-5010 billy@versaenv.corn 0 Versatile Environmental LLC 2018 Air Quality Analysis, LLC "Air quality assurance professionals" November 231h, 2018 Advantage Abatement Heath Wolfe 8200 E. Pacific PI. Unit#306 Denver, CO 80231 Project:508 E.Lionshead Cir.#205.Vail,CO 81657 Dear Mr.Wolfe: Air Quality Analysis, LLC(AQA)has analyzed the following samples by Phase Contrast Microscopy(PCM), according to the National Institute for Safety and Health (NIOSH)7400 method in general accordance with the PCM methodology. Air Quality Analysis, LLC is accredited through the American Industrial Hygiene Association (AIHA) for Phase Contrast Microscopy (PCM) analysis Lab ID #219321. Air Quality Analysis, LLC successfully participates in the AIHA Proficient testing(PAT)program. Air Quality Analysis, LLC Laboratory Job#:AQA18-0287 is the lab number assigned to this project. The air sample results for the project referenced above have been included in your final report and sent to the email and or address associated with this project. The results described in this report apply only to the samples submitted and analyzed. This report is considered highly confidential and the sole property of the customer. Samples will be disposed of after sixty(60)days unless longer storage is requested. Should you have any questions concerning this project, please do not hesitate to contact our office at (720)234-5010. Respectfully, f24 qta Billy Huff AMS Cert#17831 P.O. 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