an innovative tool for the review of health and safety work practices and the implementation of...
TRANSCRIPT
An innovative tool for the review of health and safety work practices and the implementation of effective controls of particulate exposures
A new member of the HAZ-DUST A new member of the HAZ-DUST familyfamily
The first complete turnkey video dust monitor that is wireless and affordable
Provides a real-time dust reading and video overlay directly to a dedicated computer in the
VDM-7500 system
The Video Exposure Monitoring The Video Exposure Monitoring (VEM) Technique(VEM) Technique
US NIOSH produced a
publication on this
subject in 1992
entitled Analyzing
Workplace Exposures
Using Direct Reading
Instruments and Video
Exposure Monitoring
Techniques. (No. 92-104)
NIOSH reported that VEM can be used to “associate events and exposures and to promote more effective and focused recommendations for controlling the air contaminant exposures.”
The Video Exposure Monitoring The Video Exposure Monitoring (VEM) Technique(VEM) Technique
Allows characteristics about the worker’s exposure to be identified so that controls can be implemented
Allows work activity data to be combined with real-time exposure data for review and analysis by health and safety professionals
Requirements for a VEM Requirements for a VEM SystemSystem
Direct-reading instrument that provides a voltage output proportional to concentration
Response time that is less than that of the events of interest
Specificity for the contaminant of interest
Portability
Early VEM Early VEM Used Telemetry SystemsUsed Telemetry Systems
Mostly at the research levelExpensive equipment that required
extensive technical expertiseCumbersome process to mix data from
direct reading instruments with video
New VDM-7500New VDM-7500available from SKCavailable from SKC
Portable Turnkey System Easy to useSynchronized mixing of video and dust
concentrations automatically processed using proprietary software
Affordably priced
VDM-7500 TURNKEY SYSTEMVDM-7500 TURNKEY SYSTEM
Wireless real-time particulate monitorWireless video cameraCustomized, dedicated portable PC with
radio receiverSoftware and hardwarePackaged in a rolling carry case with
handle
VDM-7500 SystemVDM-7500 SystemRX Radio Module
Power Supply
Video RX Input
Storage
Mouse
Video Camera
Tool Pouch
Storage
Dust monitor
Computer Screen
Keyboard
Key Features of the VDM-7500Key Features of the VDM-7500Dust MonitorDust Monitor
Compact and portable system at 2.75 lbs Battery powered for 8 hours+ of operation True breathing zone measurements and size-
selective air sampling Large particle size range of 0.1-100 um Unique dust sensor allows for concurrent filter
gravimetric samples for further laboratory and chemical analysis
Internal pump adjustable from 1-3.3 L/min
Key Features of the VDM-7500 Key Features of the VDM-7500 Video ComponentsVideo Components
Digital and wireless for unattended operation Immediate real-time video and dust readings
of particulates “Record to disk” features allows for visual
proof of over/under exposure and concrete documentation for liability and compliance purposes
Total weight of the system is 35 lbs. CE mark
VDM-7500 APPLICATIONSVDM-7500 APPLICATIONSActivity AnalysisActivity Analysis
A systematic method of breaking a complex job into elements so that they can be studied for improvements
Allows identification of those elements that contribute most to a worker’s air contaminant exposures
Involves time/motion studies and coordinating activities with resulting contaminant exposures
VDM-7500 APPLICATIONSVDM-7500 APPLICATIONSSupplement to samplingSupplement to sampling
Integrated sampling using filters and personal sampling pumps should be done before conducting video monitoring.
After determining the extent of the exposures with filter sampling, VEM can be applied to review work practices and activities producing high exposures.
VDM-7500 APPLICATIONSVDM-7500 APPLICATIONSSource evaluationSource evaluation
VEM can be used to determine the specific source of a worker’s exposure to air contaminants, the contaminant generation rate, and the effectiveness of ventilation systems in reducing the dust levels.
OTHER APPLICATIONSOTHER APPLICATIONS
Demonstrations of how worker’s activities can affect exposure levels
Comparisons of worker-to-worker activities and resulting exposures
Qualitative and quantitative studies of dust exposures too short to be studied effectively with integrated air sampling methods
OTHER APPLICATIONSOTHER APPLICATIONS
Identifications of tasks that produce high exposure levels
Demonstrations of exposure reductions achieved from various control techniques
GENERAL USES OF VEMGENERAL USES OF VEM
Exposure monitoringSelection of respiratory protectionWorker trainingSafety auditsCompliance program reviewsWorker’s compensation issues Insurance investigations
CASE STUDYCASE STUDYWorker Exposures During Building Worker Exposures During Building
DemolitionDemolition
The purpose of the study was to estimate a construction worker’s dust exposure inside the crane cockpit during active demolition of a commercial building so appropriate control measures could be implemented.
A Field Study of Worker Exposure A Field Study of Worker Exposure During Building DemolitionDuring Building Demolition
Exhibit A
Test ProcedureTest Procedure Samples were taken in the respirable mode in
accordance with NIOSH method 0600. Prior to field testing a calibration curve was
established correlating the real-time readings to filter gravimetric test.
A crane operator wore the real-time dust monitor during active demolition.
Sampling was started when the crane began the demolition process and stopped when the specific work task was completed.
An observer also tracked the time using a stopwatch and correlated work activities with exposure levels.
EXPOSURE DATA WITH VIDEOEXPOSURE DATA WITH VIDEO
EXPOSURE STATISTICS FROM EXPOSURE STATISTICS FROM DUST MONITORDUST MONITOR
Conclusions from the VEM studyConclusions from the VEM study
Although dust levels were not over the OSHA exposure limit, it was determined through observation that the door of the crane cockpit was open. The exposure levels would have been significantly lower had the door been closed during the work task.
The following control measures were implemented: closing the entry door and windows in the crane cockpit during demolition and requiring the crane operator to wear a dust respirator.
for hazard prevention and control of
particulate exposures
www.skcinc.com