An innovative tool for the review of health and safety work practices and the implementation of effective controls of particulate exposures.

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

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