to Basics Fundamental Science Applied to NOA Mitigation James A Ippolito Carole J Kawamoto amp Jeffery P Bauman KUMA Corporation Grass Valley California USA AEG Special Joint MeetingSymposium ID: 796523
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Outdoor Air ScrubbingBack to BasicsFundamental Science Applied to NOA MitigationJames A. Ippolito, Carole J. Kawamoto & Jeffery P. Bauman KUMA Corporation, Grass Valley, California, USA
AEG Special Joint Meeting/Symposium
“Assessment, Monitoring and Mitigation of
Naturally Occurring Asbestos (NOA) Hazards in the Western U.S.”
Slide2KUMA’s Strategy for NOA Control
NOA TAMP (Task Analysis
& Mitigation Plan)
Identify Particulate
S
ource
A
reas
Identify
P
articulate Control Methods
area mist
point source mist
soil glues
adequately wet soil
consolidation of soil
Mitigate all sources
Slide3NOA Control using Adequately Wet Testing
Slide4Inertial ImpactionCollection Efficiency
Dust (NOA) Collection Process
Water Particle Distribution
Comparison of Typical
D
ust
Control Methods to KUMA’s Methods
Particulate Collection
Slide5Particulate CollectionInertial Impaction
Slide6Collection EfficiencyGeneral relationship between particle size and collection efficiency
Source: EPA-APTI: 413 Control of Particulate Matter Emissions, 5
th
Edition, Chapter 4
Slide7Dust (NOA) Collection Process
5 micron long asbestos fiber floating in the air
Water condensation: NOA fiber too small for effective collisions
Nucleated condensation of water molecules and small water particles impaction
More condensation: still too small for effective collisions
5 micron size water droplet with NOA fiber nuclei
More condensation: still too small for effective collisions
10 micron, cloud-sized droplet
Effective collisions and more condensation
100 micron
Settling V = 0.3 m/s
200 micron
Settling V = 0.7 m/s
1000 micron
Settling V = 3.9 m/s
Slide8Water Particle Distribution – KUMA Systems
Slide9Comparison of Typical Water Spray MethodsFire Hose (velocity >10 mph)10,000 micron drops
100 psi
Spray Fan
(velocity >100 mph)
~40 micron drops
Water and air at the same velocity
Uses 200 psi
small volume
mist nozzles
KUMA Mist Gun
(velocity >400 mph)
Very small (32% under 40 micron drops)
Uses high volume spray nozzle
2,000 psi
Slide10KUMA Video
Slide11Question & Answers