mold prevention & remediation jim biddle, ms, cih nau environmental health & safety...
Post on 28-Dec-2015
216 Views
Preview:
TRANSCRIPT
Mold Prevention & Remediation
Jim Biddle, MS, CIHNAU Environmental Health & Safety928-523-6109 (office)James.biddle@nau.edu
2
Presentation Format
• Prevention• Is it mold?• Quantity• Type of host substrate • Where’s the water source?• Do we need help or can we do it in-
house?• Guidelines for removal & PPE
3
Prevention: Control Water Sources!
• Mold spores are everywhere and can remain non-viable (not living but ready to live) for years
• Mold needs water to live; spore with water comes “alive” and starts to spread
• Lives on cellulosic type materials like cardboard, wood, paper side of drywall, paint on drywall, cove base or carpet glues/adhesives
• Controlling amount of water to colony controls growth rate/amount
4
Is it Mold?
• First, and perhaps most importantly, we need to determine if it is mold. Some building substrates with “contamination” may look deceiving….
5
Is it Mold? (cont.)
6
Is it mold? (cont.)
7
Is it mold? (cont.)
8
Is it mold? (cont.)
9
Is it mold? (cont.)
10
Is it mold? (cont.)
11
Is it mold? (cont.)
12
Is it mold? (cont.)
13
Is it mold? (cont.)
14
Is it mold? (cont.)
15
Is it mold? (cont.)
16
If Not Mold…
• Water damage still an issue– Stop the water – Commence restorative drying of
materials after water source secured (within 24 hours)
• Amount of water damage will determine whether drying can be done in-house or by outside vendor
17
Restorative Drying
18
Dehumidification
If it is Mold….
How much is there?More or less than one sheet of drywall (~30 sq. ft)?
<30 square feet
EPA/OSHA/CDC says can be safely removed / cleaned in-house with Custodial, Res Life, Carpentry/Paint staff(If nobody has allergies)
>30 square feet…
Most likely need a qualified vendor to remove (aka “remediation”)
22
Remediation Time!
• General consensus among recognized organizations is to just get it out (EPA, AIHA, ACGIH, IICRC, etc.)
23
But how?
• Utilize “qualified” remediation firms• Latest, greatest, and safest
standard for removal is from Institute of Inspection, Cleaning & Restoration Certification (IICRC Standard S520, 2003)
24
IICRC Standard
• IDs three categories of indoor mold contamination resulting from water intrusion– Condition 1 (normal fungal ecology)– Condition 2 (settled spores)– Condition 3 (actual growth)
25
What condition is this?>/< 30 sq. ft?
26
Condition/threshold amount?
27
What’s the issue here?
28
And this?
29
Condition/threshold?
30
Check Mechanical Rooms Often
31
Conclusion
• Identify if substrates have mold growth or not
• Stop water intrusion if possible/safe to do so, or get assistance (plumbing or maintenance person, etc.)
• <30 sq. ft: remove moldy contaminated materials following IICRC protocol
• >30 sq. ft: probably need outside help
• Insurance will most likely cover costs
top related