![]() The combustible gas meter will be calibrated to respond to methane. The PID shall be equipped with an electron volt (eV) lamp that is capable of detecting the Property contaminants. The monitoring will be performed using a hand- held real- time dust meter to measure concentrations of respirable dust, a photo-ionization detector ( PID) to measure the concentration of VOCs, and a combustible gas meter to ensure the protection of the health of the workers on the Property. Although considered to be unlikely based on prior investigation and remedial construction activities, exposure to methane is possible from impacted soil or soil vapor at the center of Parcel C, and shall be monitored to prevent respiratory exposure. Monitoring will primarily focus on dust monitoring to address respirable dust containing non- volatile contaminants (e.g., PAHs, metals, and dioxin). Perimeter and breathing- zone monitoring shall be performed during any earthmoving activities involving impacted soil/ sediment that have the potential to generate airborne dust. Background, environmental, quality assurance and final air clearance samples will be collected and analyzed according to NIOSH Method 7400 methodology.Īir Monitoring. For final clearance samples, the Contractor will conduct sampling at a sufficient velocity and time to collect a sample volume necessary to establish the limit of detection of the method used at 0.01 f/cc or background levels, whichever is higher. Per regulation, environmental and perimeter air monitoring outside of regulated containment areas shall not exceed clearance levels contained in 40 CFR part 763, subpart E, which is 0.01 f/cc or no more than background levels representing the same area before the asbestos work began. ![]() Conduct personal sampling required by 29 CFR Part 1926 Section 1926.1101, in accordance with the NIOSH Method 7400, Phase Contract Microscopy ( PCM). If either an environmental concentration of 1.0 f/cc expressed as an 8‐hour TWA or a personal excursion concentration of ‐1.0 f/cc expressed as a 30‐minute sample occur inside the enclosed work area, stop work immediately, notify the GCLBA, and implement additional engineering controls and work practice controls to reduce airborne fiber levels below prescribed limits in the work area. Workers shall not be exposed to an airborne fiber concentration in excess of 1.0 f/cc, as average over a sampling period of 30 minutes. If fiber concentration rises above 0.1 f/cc, the Contractor will examine work procedures to determine the cause and work to implement corrective actions. The Contractor shall maintain a fiber concentration inside enclosed containment regulated work area equal to or less than 0.1 f/cc expressed as an 8 hour, TWA during asbestos abatement. ![]() Results of the personal samples shall be posted at the job site and made available to the GCLBA as specified herein. ![]() Collect personal air monitoring samples to represent the work activities for each shift, or a minimum of two, whichever is greater. Perform sampling and analysis for airborne concentration of asbestos fibers in accordance with 29 CFR Part 1926 Section 1926.1101, the air monitoring plan, and as specified herein. ![]()
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