Atmospheric Monitoring Conducted at Roofing Trial of Insulation Foam The notifiers’ submission contains the following atmospheric monitoring data obtained during a roofing of insulating foam. The procedures taken to obtain the vapour concentrations during the were not specified. From photographs contained within the notifiers’ submission it appears that during this the gun operator sprayed the foam onto the roof surface to form an insulating layer, and that after spraying the panels of the roof were replaced. Personnel monitoring conducted at roofing of insulating foam (Honeywell, January 2000) Personnel Vapour Concentration (ppm)a Gun operatorb 19 Hosemanc 15 Cleaner of spray nozzle 43 a8-hour TWA. bThe gun operator sprays foam on the roof surface cThe hoseman supports the hose through foam flows. In this he was located approximately 2m behind gun operator. Area monitoring conducted at roofing trial of insulating foam (details not available) (Honeywell, January 2000) Sample Location Vapour Concentration (ppm) Upwind 21 Downwind operator (head level) 63 Downwind hoseman (head level) 27 Spray plumb 39 6.1.2.2 Boardstock Product On a typical boardstock production line, will be blended with the polyol blend in a blend tank, and then transferred through metering pumps or piping to the foam pour area. This progresses to a vented oven, and along an open conveyor to a cut-off saw. Another open conveyor then transports the foam portions to the stacking or packaging area. One notifier states that at the customer’s site, small 50 g to 3 kg mixes of polyol blend are used to manufacture rigid foam systems. The foam is contained within a mould in order to minimise loss of the blowing agent. A maximum of 3% of the shot weight is lost during foaming, and thus the maximum exposure to HFC-245fa will be 90 g in a well-ventilated area.
Atmospheric Monitoring Conducted at Roofing Trial of Insulation Foam The notifiers’ submission contains the following atmospheric monitoring data obtained during a roofing of insulating foam. The procedures taken to obtain the vapour concentrations during the were not specified. From photographs contained within the notifiers’ submission it appears that during this the gun operator sprayed the foam onto the roof surface to form an insulating layer, and that after spraying the panels of the roof were replaced. Personnel monitoring conducted at roofing of insulating foam (Honeywell, January 2000) Personnel Vapour Concentration (ppm)a Gun operatorb 19 Hosemanc 15 Cleaner of spray nozzle 43 a8-hour TWA. bThe gun operator sprays foam on the roof surface cThe hoseman supports the hose through foam flows. In this he was located approximately 2m behind gun operator. Area monitoring conducted at roofing trial of insulating foam (details not available) (Honeywell, January 2000) Sample Location Vapour Concentration (ppm) Upwind 21 Downwind operator (head level) 63 Downwind hoseman (head level) 27 Spray plumb 39 6.1.2.2 Boardstock Product On a typical boardstock production line, will be blended with the polyol blend in a blend tank, and then transferred through metering pumps or piping to the foam pour area. This progresses to a vented oven, and along an open conveyor to a cut-off saw. Another open conveyor then transports the foam portions to the stacking or packaging area. One notifier states that at the customer’s site, small 50 g to 3 kg mixes of polyol blend are used to manufacture rigid foam systems. The foam is contained within a mould in order to minimise loss of the blowing agent. A maximum of 3% of the shot weight is lost during foaming, and thus the maximum exposure to HFC-245fa will be 90 g in a well-ventilated area.