Agmt04 Protech Consulting - Laserfiche WebLink

Browse Search

IJ - work area. Samples will be taken during removal and decontamination operations. Samples will collected in areas most vulnerable to containment breach and fiber contamination such as in the clean room, at the negative air exhaust, at critical baniers, and in occupied areaS near the work area, Sample analysis will be conducted by Phase Contrast Microscopy NIOSH Method 7400. In accordance with the requested scope of services, ProTech's technician will NOT be on site full-time. ProTech will not provide comprehensive oversight of the project and will not be able to verify, or attest to the work perfonned by the contractor during the shift 3.2 Area Air sample Analysis Phase contrast microscopy (PCM): PCM sample analysis will be conducted according to the National Institute for Occupational Safety and Health (NIOSH) method 7400. NIOSH 7400 requires that all fibers with certain physical dimensions be counted so that cellulose, mineral woo] and fiberglass are possible interferences. In sample analysis according to NIOSH 7400, 100 viewing fields (approximately 0.2% of the total filter area for a 25mm fiJter) are examined at 400X magnification by Phase Contrast Microscopy (PCM). The number of fields observed are extrapolated to the total filter area, and divided by the volume of air sampJed to yield results in tenDS of fibers per cubic centimeters of air (F/CC). 3.3 Progress Work Area Inspections ProTech's technician wjlJ accompany the contractor's competent person during daily job site inspections to verify proper seal of the polyethylene containment systems, sufficient negative air pressure, and proper postage of warning signs. Work areas will be examined and work procedures reviewed with the site supervisor to verify the contractor's compliance with regulatory standards and accepted industry practices. Any observed gross deficiencies will be reported to the client for remedial action and cOlTection. SECTION 4 - POST ABATEMENT MONITORING: 4.1 Final (Work Completion) Inspections Following asbestos removal and work area decontamination, visual inspections wjJ be conducted inside of each abatement work area. ProTech wíll perform a complete visual inspection of each work area to detect residual or overJooked asbestos debris on wans and horizontal surfaces in and around the work areas. 4.2 Final Air Sample CoIlection After the work areas are found to be visua!ly clean, clearance air samples will be taken in the work area. A minimum of three (3) will be collected in each contiguous work area. 4.3 Final Ai.- sample Analysis: Final air sample will be analyzed by Transmission electron microscopy (TEM). TEM analysis will be performed on an electron microscope at 16,000 to 20,000 X magnification. A!I particles with a length to width aspect ratio of 5 to 1 and a length greater than or equal to 0.5 microns will be subjected to detailed morphological and select area diffraction analysis. Energy dispersion X-ray analysis will be used to confirm the chemical composition of asbestos and other structures as needed. After determining whether or not the structures are asbestos and what type of asbestos they are, analysis will continue until either 50 asbestos structures are found or until a minimum analytical sensitivity of 0.005 structures per cubic centimeter (s/cc) is obtained. Propm;al: Asbestos Abatement Monitorin~ Prop No. 158-03,?k City of RWC f MSC Warehouse Page 3 -