2015 WSSCA Conference Certification Program/… · Univent motor replaced and unit retested. 205...
Transcript of 2015 WSSCA Conference Certification Program/… · Univent motor replaced and unit retested. 205...
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2015 WSSCA Conference
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Patrick Finnemore, P.E.
Director of Facilities
Kenosha Unified School District
Office: 262-359-7757
Cell: 262-945-2129
Special thank you to Bill Freeman of EMC who developed much of the presentation
materials
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1. IAQ Contaminants
2. Acceptable IAQ
3. Mold
4. Mold Clean-up and Responding to Floods
5. Preventative Maintenance
6. IAQ Response Strategies
7. State Regulations
8. Q&A
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Carbon Monoxide (CO)
Carbon Dioxide (CO2)
Temperature◦ ASHRAE recommended for summer/winter
◦ Certainly very subjective!
Relative Humidity (RH)◦ ASHRAE recommended 30-60% RH
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Bacteria
Chemicals
Dust Mites
Exhaust, Nitrogen Dioxide (NO2), Nitrite Oxide (NO)
Human Related
Waste
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Lead/ Asbestos
Natural Gas
Pesticides
Volatile Organic Compounds
Sewer Gas
Mold
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Thermal Comfort◦ Temperature and relative humidity
◦ ASHRAE Standards – 80% of building occupants find comfort in specific range
Ventilation Standards◦ Air exchange rates
◦ Minimum outside air requirements
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Fresh Air (Oxygen) Needs◦ CO2 Levels
OSHA – 5,000 ppm
ASHRAE – 1,000 ppm
Canada has a classroom limit of 1,500 ppm
◦ We have much greater CO2 monitoring in our buildings, especially in large areas such as gymnasiums
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◦ Increased individual sensitivities (allergies, asthma, chemicals, etc…)
◦ Medical Advances showing correlation of disease and health related issues to the indoor environment
◦ New Building Materials: more manufactured products with chemicals that off-gas and soft/porous materials that grow mold both can negatively impact the indoor environment.
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Not a plant, not an animal: Unique kingdom (Mycota)
Each species had its own unique characteristics
Most grow best in warm, wet environments
Colonization can occur in a sustained environmental conditions, and can then withstand extremes and regrow when favorable conditions return
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Tertiary (>.90aW):◦ Stachybotyrys◦ Trichoderma◦ Fusarium◦ Bacteria
Intermediate(0.80 - 0.90):◦ Cladosporium◦ Some Aspergillus
Low (<.80): ◦ Penicillium◦ Most Aspergillus
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Spores + Food + Moisture = Growth•Spores are everywhere!
•Food sources are abundant! (85 % of dust is organic…..cellulose is to fungi what starch is to humans)
•Moisture
(building materials wet for over 48 hours)
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SPORES
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+ FOOD SOURCE
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+ MOISTURE
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= GROWTH
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All major guidance documents recommend timely removal of visible mold
Identify and correct moisture source
EPA: “Do not run the HVAC system if you know or suspect that it is contaminated with mold”
Is there more “Hidden” Mold?
Are building contents and possessions affected?
Can mold be cleaned or must it be remediated?
Non-viable fungi can still emit allergens, mycotoxins
Should I evacuate some or all occupants?
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EPA Guidelines for Mold Remediation• Small
• <10 Sq. Ft. Affected• Min. PPE – No Containment (N95 respirator)• Need for OSHA respiratory protection program?
• Medium• 10 – 100 Sq. Ft. Affected• Limited to full PPE – Limited Containment
• Large• 100 + Sq. Ft. Affected• Full PPE – Full Containment, Neg pressure
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Can I Remediate Small Amounts of Mold?
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Locate & Repair Water sources
Hazard Communication Training (Mold Awareness)
Work Area Isolation
PPE
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Engineering Controls◦ - HEPA Vacuum
◦ - Wet Wipe Mild Detergent
◦ - Do not spread the contamination
◦ - Use of biocides?
Work Practices
- Careful source removal
- Disposal
Documentation
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Categories of Water Loss◦ Category 1 (Clean Water)
Water that is clean at the releasing source and does not pose a
hazard if consumed by humans. Category 1 water may become
Category 2 over time or as it mixes with soils, on or within
floor coverings or building assemblies, which can promote the
growth and amplification of microorganisms in the water.
Examples: burst water pipes, failed supply lines on
appliances, broken toilet tanks, etc....
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Categories of Water Loss◦ Category 2 (Gray Water)
Water that begins with some degree of contamination and could
cause sickness or discomfort if consumed by humans. As with
Category 1 water, Category 2 water can become Category 3 water
over time and depending on other environmental conditions.
Examples: Discharge or overflow of washer or dishwasher,
overflow of toilet bowl, etc….
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Categories of Water Loss◦ Category 3 - (Black Water)
Water that is highly contaminated and could cause death or serious
illness if consumed by humans.
Examples: Sewage, rising flood water from rivers and streams,
ground surface water flowing horizontally into buildings.
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State of the art guidelines◦ ANSI/IICRC S500 Standard and Reference Guide for
Professional Water Damage Restoration
◦ ANSI/IICRC S520 Standard and Reference Guide for Professional Mold Remediation
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Rebuild/Post Remediation Considerations Determine cause of water incursion and make repairs Duct Work and HVAC cleaning Humidity resistant ceiling tiles Fiberglass based drywall-DensShield® Tile Backer No items mounted or placed directly against walls Steel Studs-Closed cell insulation
Spray or pre-formed ½” space between the floor and drywall Hard surface flooring-stained concrete is best Dehumidify during and after construction Negative Pressure-Air Scrubbing during rebuild Low or Zero VOC Paints-Green products
Air conditioning or commercial grade dehumidifiers Ventilate crawl spaces/tunnels
Slight negative pressure to the occupied space Visual Inspections of vulnerable areas
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Porous building materials (carpets)
◦ HEPA vacuum daily
◦ Reduce Clutter
◦ Cleaning schedule Winter months for non-air conditioned buildings
◦ Cleaning chemicals
◦ Food, drink policies
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Building design & construction
◦ HVAC
◦ Air conditioning
◦ Building materials
Carpet versus hard surface
Drywall use near water sources
Insulation
Placement of vapor barriers
Building envelope
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HVAC Inspections◦ HVAC room, penthouse, roof◦ Heating & cooling coils◦ Condensate drain (Drip) pans◦ Source of outside air intake◦ Outside air intake screen/grill◦ Ducts-outside air, supply air, return air,
exhaust◦ Grills, grates & diffusers-supply and
return◦ Ceilings/tiles surrounding grills &
diffusers◦ Interior insulation
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National Air Duct Cleaners Association (NADCA)◦ Frequency: Units: 1 year; Ducting: 1-2 years
(based on the type/use of the building – schools 2 years) – A 10 year cycle is generally reasonable
◦ Insure completion to current NADCA guidelines.◦ Insure NADCA trained/certified contractors.◦ Insure proper Insurance, equipment, experience.◦ Insure proper planning, expectations, follow-up.◦ Provide project follow-up documentation such as
visual Inspections, photos and samples collection with Laboratory Analytical Data.
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42 Schools
Over 2,200 Classrooms
Test each room once per year in winter
Make data public
In most cases we correct problems before anyone even notices that the problem exists
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Goal: Under 1,000 ppm
If measured above 1,000 ppm then we take corrective action
Retest
Maximum allowable after corrective action is 1,500 ppm
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ROOM TEMP HUM % RH
CARBON
DIOXIDE
PPM
CARBON
MONOXIDE
PPM
# OF
OCCU.
DOOR
OPEN OR
SHUT
WINDOWAHU
UNIVENT
130 72.0 20.4 1680 1.6 18.0 SHUT SHUT UNI
Bad motor on univent.
130 70.3 21.1 890 0.7 20 SHUT SHUT UNI
Univent motor replaced and unit retested.
205 74.3 26.8 2050 1.3 26 SHUT SHUT UNI
Univent turned off and blocked with books
205 76.0 47.5 1108 0.7 30 OPEN SHUT UNI
Univent turned on, filter cleaned, motor greased, coil cleaned, all obstructions removed.
DATE: 2/28/03
INDOOR AIR ANALYSIS: TREMPER
DATE: 3/17/03
DATE: 3/4/03
DATE: 3/4/03
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▶ Document
• IAQ complaint response form
►Hazard assessment & response
• Emergency vs. Non-Emergency
– In-house response/repairs
–Outsource response/repairs
• Inconclusive
– Investigation by outside
–Medical evaluation of affected individuals
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Inspection
• HVAC
• Obvious sources
• Mold
• Carbon Monoxide
• Chemical spill
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Investigation
• Survey/questionnaires/interviews
• Complaint history
• Water incursion history
• Visual inspection
• Moisture measurements
• Visual again!
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Log all concerns, work done to correct concern and the final resolution
Keep employee and Principal informed of progress
Supplement resolution with test data if possible
Look for both simple and systemic solutions
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Problems to Avoid:
• Hasty response
• Confusion/Lack of Communication
• Wasted time & monies
• Poor public relations
• Legal liabilities
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Indoor Environmental Quality (IEQ) Management Plan required for all School Districts in Wisconsin.
Administered by the Department of Public Instruction (DPI) as directed by 2009 Wisconsin Act 96.
WI Stat. 118.075 (3) and (4) is the law requiring IEQ Management Plans in school districts.
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IEQ Management Plan Requirements:
1. Mission Statement
2. Role of the IEQ Coordinator
3. Communication
4. Reporting
5. Addressing IEQ Findings
6. IEQ Policies
7. Procedures for Maintenance and Facility Operations
8. Construction and Renovation
9. Staff Responsibilities for Maintaining Good IEQ
10. Prevention of IEQ Problems
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