Date post: | 18-Aug-2015 |
Category: |
Environment |
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Suppression Tactics
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Suppression Tactics
Based on your Pre-Fire Plan1. Cover2. Excavate and Foam3. Overhaul
4. Inject inert gas (i.e., CO2) or water5. Flood (AKA Surround and Drown)6. Let-it-burn7. Accelerate (Yes It has been done!)
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Apply SOIL
That’s it?
Most of the time
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One Question for Suppression
Do you have a dedicated soil stockpile?
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SF Landfill - Excavate
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Next Approach
Works well on subsurface fires from 1 to 30 feet Use hand held infrared to delineate fire material Use on localized problems Use foam with water Excavate material to a suppression deck Add additional cover 3x the surface area Can excavate down to 70 feet, limited
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Excavator Specs
Standard Depth 20 to 30 feet 345DL Cat™ = 29 ft
Extended Reach 35 to 70 feet
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Overhaul
Costly and Timely Must account for suppression water Need sq ft for a suppression deck High probability of success for a large
scale incident
9Source: Tony Sperling www.landfillfire.com
Overhaul - Delta Shake & Shingle
10Source: Todd Thalhamer
Overhaul – Fresno Debris
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Overhaul Issues
Know what your fire is doing Expect the UNEXPECTED Account for Water – Where is it going Read the SMOKE
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Art of Reading Smoke
Developed by Dave Dodson, Retired B.C. and Duty Safety Officer
Technique to read the smoke during a structure fire to determine the appropriate course of actions and predict the next event
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Art of Smoke Concepts
Determine the stage of the box Absorbing heat Not absorbing heat
Smoke is fuel – High levels of CO Fuels have changed – More synthetics Fuels have Triggers (Flash and Fire Points)
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Four Step to Read Smoke
Volume – Turbulent, Laminar, Hazy Velocity – Compare the velocities, it will help you
determine where the fire is located fastest smoke in the smallest opening
Density – Thicker the smoke the more dangerous
Color – Degree of carbon. CAN BE FILTERED over distances. Carbon “sticks” to soil, debris Backdrafts – 02 deficient environments, yellowish
smoke from seams, sulfur compounds that have been carbon filtered
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Art of Smoke to Waste Fires
Turbulent Black Smoke - Surface fire Laminar White Smoke – Underground
Whitish smoke with its own energy (speed/volume) = deep seated fire that has traveled over a distance losing the carbon
Whitish grey smoke with no energy = shallow subsurface fire
Evaluate over time, watch for changes
16Source: Tony Sperling - Landfillfire.com
What is the smoke doing?
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Deep Seated Subsurface Fire
Whitish Smoke/Same Speed/Same Volume = A Deep Seated Fire
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Art of Smoke
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Art of Smoke
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9:50 AM
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9:55 AM
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10:05 AM
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Pop safety quiz …
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Inert Gas Injection CO2 vs. N2 – Recommend CO2
Limited Results for Suppression Use on small zones
Pre-excavation Recommend for Containment
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Inert Gas Injection
Note of caution Causes frost upheaval Extreme Temps Use Qualified Contractors
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Water Injection
Limited Results – Use on small zones Best for facilities with liners and LCS
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Flooding In general, not
recommended
Possible stability & Leachate issues
If used, the area should be flat and have a liner and LCS or have other mitigating circumstances
[Note: 7,000 gallons a load]
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Let it Burn Typically selected when
there is a lack of funding for suppression
Long term air quality issues Stability and security issues Least favorable by the
community
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Accelerated Burn
Guam – Tire Fire NOT RECOMMENDED
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Accelerated Burn Brother’s DLC Facility, Canada Shallow GW and Limited Funding Community Accepted and it Worked!
Source: Tony Sperling www.landfillfire.com
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Top 4 Issues Waste Fires
1. No Pre Plan
2. Water Supply and Equipment
3. Command and Communications
4. Health and Safety
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Use of Water at a LF Fire
Pre-cool and particulate mgmt Knock down and equipment safety Surround and Drown – Not preferred
Last resort Will increase bio decomposition May overwhelm the LCS