Mold Remediation & Duck Cleaning Work-If Done Right

Mold Remediation & Duct Cleaning Works….If Done Right?
*by Ed Ziegler, Pure Air Control Services *

WATE 6 TV recently wrote a story entitled *“**Businessman takes woman’s money, never cleans mold or repairs carpet”***exemplifies the charlatan and shaman mentality of many in the so called IAQ experts that take advantage of the unsuspecting public.

This activity has grown to epidemic proportions. Indoor Air Quality issues are rapidly becoming part of the general public’s consciousness through the mass media’s portrayal of proliferating toxic mold. Many Floridians, along with the rest of the nation are now discovering that non-qualified commercial mold remediation firms and residential duct cleaning services can be just as hazardous.

Numerous post-hurricane mold cleanup efforts have been ineffective. A recent article stated that 40 percent of the certified duct cleaners do not follow their certifying entity’s procedures and protocols. Many states are rushing to introduce legislation that qualifies and regulates the currently unregulated remediation industry. At this point, the question must be asked: Does mold remediation or air duct cleaning really help?

The first step to consider before embarking on a mold remediation or duct cleaning project is to determine if the mold types and levels or duct condition are the source for a current or potential health problem. Keep in mind, the source of a mold problem may not be visibly apparent, and just cleaning the ducts may not be the answer. Contact a reputable environmental consultant who can conduct an indoor environmental walkthrough that includes a pragmatic series of diagnostic tests to determine the environmental status of your home or office.

What Does Mold Remediation and Duct Cleaning Entail?

Mold Remediation includes a large variety of components (e.g. drywall, wood, carpet, building furnishings, etc.), which may also include duct cleaning. The type of mold, levels of contamination, and clearance levels will determine the protocols employed during the remediation project. It is important that the remediation service provider environmentally clean all the contaminated components so unclean sections will not re-contaminate the home or office again.

Anti-microbial chemicals are sometimes applied during the cleaning process and in some cases incorporated into the encapsulating products. Ensure all chemicals used are EPA registered for the specific application. All MSDS sheets should be maintained on the project worksite. Some newer remediation efforts include cryogenic processes for mold treatment.

Duct cleaning entails cleaning the various heating and cooling system components of forced air systems. These components include the supply and return air ducts and registers, grilles and diffusers, heat exchangers heating and cooling coils, condensate drain pans (drip pans), fan motor and fan housing, variable area volume (VAV) boxes, fresh air ductwork, and the air handling unit housing.

The service provider should take preventive steps to protect individuals from exposure to dislodged contaminants during the cleaning process. These steps may include the use of containment barriers; the utilization of negative air machines (NAM) employing High Efficiency Particulate Arresting (HEPA) filtration rated 99.97% efficiency for particulate size of .03 microns on the cleaning equipment, effective “tools of the trade” to facilitate proper removal, and the use of employees who are trained in OSHA safety practices.

In an office type building, remediation should be performed at night, to again minimize the occupational disruption of the tenants and potential contaminants disturbed during remediation processes.

Signs of Mold

The most efficient means of determining the presence of mold is through indoor environmental surveys. Often, building occupants exposed to mold contamination experience allergic symptoms, asthma attack, etc. Some non-ideopathic entities like rapid changes in air temperature and humidity levels, building pressurization, fluctuating lighting, and odor-causing evolutions can elicit similar symptoms and sometimes even can mask a mold-related problem.

Mold requires moisture for growth. Moisture intrusion due to poor construction design, materials, laborers, and technique is currently a major industry problem. There are currently no regulations for mold contaminant levels, but there have been multiple bills introduced at the various levels of government (federal and state) with regulation coming in the not too distant future.

Opportunistic pathogenic molds are well documented as well as others that generate toxic chemicals (MVOC’s). Even if you have visible mold present, reputable professionals should do the qualification and quantification with all assay analyses performed by an accredited laboratory.

Guidelines for acceptable levels of molds have been developed through trend analysis of the Computer Assisted Air Management Program Systems (CAAMPS) at the Environmental Diagnostics Laboratory of Pure Air Control Services ( CAAMPS contains data from over 60,000 samples collected in over 400 million sq. ft. of commercial and residential sites.

Signs That Ducts Should Be Cleaned

Several factors help determine if the duct system should be cleaned. One major factor is visible mold growth inside hard surface ducts or on other components of your system. Be aware that although a substance may look like mold, it may not be. The use of an AIHA accredited environmental laboratory will accurately determine whether a sample is mold or simply debris that resembles it.

If the air duct insulation is saturated with water, it should be removed and replaced and the cause of the growth corrected before the cleaning or removal occurs.

Other factors include rodent or insect infestation and a clogged HVAC system that actually releases contaminants into the building or home through the registers.

Risk Factors

If proper mold remediation or duct cleaning procedures are not followed, these processes can cause more dust, debris, and molds to be released into the air. Inadequate negative air machine collection systems and poor containment can cause this problem.

Also, there is the possibility the service provider can damage your ducts or heating and cooling system, which could result in increased heating and air conditioning operational costs, expensive repairs or replacements.

Listed below are questions that should be posed to the prospective remediation and duct-cleaning contractor:

• Are the New York City Department of Health Mold Remediation Guidelines level I through level V being utilized for mold cleanup? • Is the company NADCA certified and in good standing?
• Are the NADCA ACR 2002 specifications utilized?
• Are the IICRC Standard for Professional Remediation S520 utilized?
• Do they maintain adequate insurance coverages? e.g. Professional Liability (E & O) $10M w/$1M mold remediation coverage; Contractor Pollution Liability $10M w/ $1M mold remediation coverage; General Liability $1M w/ $2M aggregate; Workers Compensation $1M; Automobile $1M,
• How long has the service provider been in business? • Is their work mostly residential homes or commercial buildings?
• Does their respective state’s Department of Business and Professional Regulation (DBPR) require licensure?
• What are the qualifications of the firm?
• Do they guarantee their work?
• What is the guarantee?
• Does the firm work with the medical community? (Health implications of work)
• Are their chemicals registered with the EPA for specific ductwork applications? (Fiberglass vs. Sheet Metal)
• What quality control/quality assurances (QA/QC) protocols do they provide to assure that mold, fiberglass, dust, pollen and dander have been effectively removed after the cleaning process?
• Are the technicians who will be performing the work environmentally trained?
• What are their backgrounds? Their experience? Have they been trained in the following OSHA programs:
• Respiratory Protection Program: 1910.134
• Hazard Communication Program: 1910.120
• Confined Space Program: 1910.146
• Lock Out - Tag Out Program: 1910.147

Detailed environmental HVAC and Mold project remediation specifications are essential in any indoor environmental remediation project and should be mandated to confirmed the qualifications of the individual as well as provide some assurance of the project’s success. Mold remediation & duct cleaning works….if done right?

**About Pure Air Control Services:
Pure Air Control Services has an in-house Microbiology Laboratory, Environmental Diagnostics laboratory ( accredited by the American Industrial Hygiene Association (AIHA), one of only 42 in the U.S. and the first in Florida.

Pure Air Control Services is under direct contract with the General Services Administration (GSA), Contract #GS-10F-0488R, linking them directly to federal governmental agencies as a provider for IAQ consulting, expert laboratory analysis, as well as HVAC system cleaning and mold remediation services.

The firm has offices in Tampa, FL, Atlanta, GA, West Palm Beach, Fl., Houston, TX, New Orleans, LA, Los Angles, CA and Washington, DC, that services the entire country.

The firm provides the following indoor environmental services on a national basis:

· Building Sciences Evaluation
· Building Health Check
· Environmental Microbiology Laboratory (AIHA Accredited)
· Environmental Project Management
· IAQ-Screen Check Kits/EvaluAire and EvaluAire Pro
· Mold Remediation Services
· HVAC System Remediation

Clients of Pure Air Control Services include: Walt Disney World; General Services Administration (GSA); Johnson Controls; Allstate Insurance; Carrier Air Conditioning; Siemen’s Building Systems; Naval Air Warfare Center, Orlando; Naval Air Station - King’s Bay, Georgia; The Haskell Company; Leon County Government, Tallahassee, Florida; Pinellas County Government, Clearwater, Florida; Collier County Government, Naples, Florida; Bayfront Medical Center, St. Pete, Florida; US Army - Ft. Bragg, Kentucky; Naval Station - Guantanamo Bay, Cuba; Montgomery County School District, Maryland; Citrus County School District, Florida; and many others.

Heck, I thought this would be a hunting tip for keeping your mallards mold free.

Every duct cleaning company in Phoenix I have heard about tries to rip-off every customer with the mold-in-the-duct-$hit.

The other piece of crap heard here is: dust mites. “Look at all the dust in the ducts. That’s where the mites will breed!” Yeah, in the warm air ducts with 120 deg air and and 6-10% RH…what can live in that environment?

Read this: The most important lines in the document are:

“In the 1990s, duct cleaning research conducted by Canada Mortgage and Housing Corporation (CMHC)1,2 and the US Environmental Protection Agency (EPA)3 tested house and duct performance before and after cleaning. Researchers observed little or no discernible differences in the concentrations of house airborne particles or in duct airflows due to duct cleaning”.

***FEAR ***is the new salespersons tool. we’ll scare you into needing our product(s)

““It’s” in/out there and we can find “it” and get rid of “it” for a nominal/exorbitant fee.”

Our own industry is based and built around fear and fear is spawning many new industries. “Better have it inspected, removed, remediated, or else.”

What happened to the good old days where we drank like fishes, ate like pigs, smoked like chimneys, screwed like monkeys and died when we were supposed to? :twisted: :mrgreen:

It either got taxed or regulated…

actually the bed is the best breeding grounds for dust mites,they have heat from your body,moisture your body emits,and feed off dead skin cells, since dust mites are about 75% water by weight they need the RH around 60% above 85% and below 50% Rh inhibits growth the allergens originating from dust mites are probably the worlds greatest cause of allergies and are significant triggers of asthma.

I’ve known this since the 1980’s but the duct cleaners don’t want the public to know it!** It would mean being honest…what a concept!!** The IAQ field is worse than home inspection…no regulation at all.

Been fighting this crap since 1986 when I started working with allergic and environmentally “ill” persons through installing HRV’s (installed my first units in superinsulated houses in 1981) and very high efficiency filter systems (a full 3" of specially selected activated charcoal plus potassium permanganate absorbent for VOC’s plus HEPA filters for dust.)

agreed Brian some people do use fear in IAQ and all we can do is educate people the best and when we can, keep on useing those high MERV rated filters