Tag Archives: Houston

Radon Gas Testing, Mold and Indoor Air Quality Inspections Dallas Houston Austin

Radon is one of the leading causes of lung cancer

Radon gas in homes is one of the leading causes of lung cancer

Current MAP requirements allow a 25% ground floor sampling variance from the ANSI-AARST testing protocol.  However, if any of the units come back at or above 4 pCi/L, 100% ground floor testing is required. You can find the current radon policy in Chapter 9.5.C of the MAP guide: https://www.hud.gov/sites/documents/4430GHSGG-BM.PDF

Attached is a 2018 radon update from Pat Burke that supplements the existing policy:   Radon Technical Updates Pat Burke November 2018

Multifamily has proposed eliminating the 25% sampling variance and requiring 100% ground floor testing.  If approved, this change would go into effect when the new MAP guide is published.  The guide is still going through review. (from a memo dated Aug 5th, 2020)

The new requirement has now largely passed and is in effect as of this writing (January 1st, 2022) and because of the ongoing pandemic, ScanTech is no longer performing surveys for OCCUPIED multi-family dwellings or nursing facilities. We only perform commercial surveys in unoccupied structures which are typically new builds, though we can still do office buildings under certain conditions such as in conjunction with other forms of indoor air quality testing.  

Biomedical / Environmental Health & Safety Consulting & Field Testing With Industrial Hygiene & Microbiology expertise

Dallas Green Building Clearance Services – Certificate of Occupancy IAQ (Indoor Air Quality) VOC measurements for Dallas Green Building Ordinance Post-Construction with regards to Pre-Occupancy baseline IAQ testing Section 804.2.

In a rush to test your property for radon gas or radioactivity in natural stone such as granite or marble? Did you know that radon is the 2nd leading cause of lung cancer? (Smoking is 1st and radon gas synergistically increases mortality rates for smokers)

While it is not well known, radon gas levels EXCEED EPA action limits of 4 picoCuries/liter (pCi/L) in up to 10 % of all homes in Dallas county with an additional 14 % falling into the marginal range of 2 – 4 pCi/L. This means that 1 out of 4 homes (10 % + 14 % = 24%) in Dallas either have a radon issue or fall into a caution category. Other counties, such as Tarrant, Collin and Denton are not immune either. (see the link below on Radon FAQ from ScanTech for more details)

Example areas of the Metroplex (not a complete or comprehensive list) which have been found by ScanTech testing to have excess radon levels which are statistically higher than the 24 % quoted above include:

  • North Dallas and Far North Dallas
  • Lake Highlands
  • University Park
  • Highland Park
  • Park Cities area
  • Richardson
  • Arlington

ScanTech now has the capability to test and get results within as little as 24 hours of initial deployment using a high quality digital tester.

Our services are both faster and cheaper than competing methods or companies and we have been performing radon testing for homeowners in the DFW area for over 10 years.

Testing is performed by an engineering graduate experienced in radioactivity measurements,  indoor air quality testing including mold inspection, formaldehyde and radon gas testing.

AARST NRPP National Radon Testing Professional Certified

AARST-NRPP Nationally Certified Radon Residential Measurement Provider ID # 108991 RT* including Advanced Multi-Family & Large Buildings Radon Measurement MAMF-2017

*Meets HUD, Fannie Mae, Freddie Mac and GSA requirements

Mold Assessment Consultant – Texas Dept. of Health Service License # MAC1387 (now licensed by TDLR (Texas Dept. of Licensing & Registration)

(Activated charcoal short term radon test kits are accurate as well, but typically require at least 4 business days to get results under best case conditions and a complete kit deployment and pickup service is almost always more expensive due to the additional travel)

Call / text to 214.912.4691 – please include physical address, square footage property and email

More information is available here:

RADON FAQ Dallas /Fort Worth — DFW North Texas Area

http://www.indoorairqualitytestingdallas.com/

http://www.scantech7.com/formaldehyde-indoor-air-quality-testing-services-dallas-fort-worth/

Radon Deaths United States Annually

Annual Radon Deaths Updated Chart

Texas CMIS Mold Information Sheet

Cities for radon / air quality inspection services include: Dallas, Austin, Houston, San Antonio, Spring, The Woodlands, Round Rock, Plano, Highland Park, University Park, Park Cities, Arlington, Fort Worth, Grapevine, Frisco, Denton, McKinney, Allen, Lewisville, Irving, Mesquite, Bedford, Euless, Richardson, Coppell, Grand Prairie, Garland, Addison, Farmers Branch, Rockwall, Carrollton, Parker, Rowlett, Lucas, Fairview, Park Cities, Keller, Roanoke, The Colony, Highland Village, Lake Dallas, Corinth, Prosper, Duncanville, Lancaster, Rowlett, Royse City, Trophy Club, Southlake and Hurst. Counties served include Dallas, Collin, Denton, Tarrant and Rockwall County.

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Carbon Monoxide Safety Levels and Indoor Air Quality

An important component of indoor air quality testing is measurement of abnormal levels of carbon monoxide.

Carbon monoxide (CO) is a result from all forms of combustible sources, from smoking and wood fires to propane and fuel-powered automobiles. Poisoning of a human subject comes in two forms – short term exposure to high levels which can cause severe illness or death, or longer term exposures at lower levels which may cause chronic symptomatology.

While actual death is relatively rare, there are far more cases that occur with sub-lethal exposures over a broad range of concentrations. (30 – 100 ppm by volume or ppmv) At the lower end (40 – 60 ppmv) headache and low levels of fatigue, and at higher levels (75 – 200 ppmv) nausea, vomiting and especially sleepiness.

Symptoms with Different Blood COHb Levels

Symptoms with Different Blood COHb Levels

Carbon monoxide and oxygen both bond to hemoglobin in the blood and will compete with each other over binding sites, but CO has the advantage as it binding sites have an affinity or preference of binding with CO that is 200 times greater than O2. (atmospheric oxygen) The result is decreased oxygen carrying capacity in the blood with the consequent neurological symptoms of oxygen deprivation as listed above as well as reduced oxygen to other body tissues. It also binds to intracellular proteins such as tryptophan oxidase, cytochrome oxidase,  myoglobin, and dopamine hydroxylase which may cause extra-vascular effects.

The result of CO combining with hemoglobin is to form carboxyhemoglobin. (COHb) Exposure to CO can be evaluated by measurement of the levels of COHb in the blood which is typically less than 1% for unexposed individuals. This is the % amount of blood hemoglobin bound with carbon monoxide. Cigarette smokers typically have a level of 3% – 8%. OSHA has a permissible exposure limit (PEL) of 50 ppmv over an 8 hour time-weighted average (TWA) in which case an individual would have a COHb level of approximately 5%. At 100 ppmv, it would be over 10%.

COHb Levels Resulting from Exposure Duration

COHb Levels Resulting from Exposure Duration

Even low level carbon monoxide exposures can cause issues in compromised human subjects such as those with cardiovascular disease. The lowest level at which COHb can show as a physiological symptom is 3 %- 4 % COHb. At 6 % COHb, arrhythmia may be induced in exercising patients with coronary artery disease with a risk of sudden death. There is also evidence that suggests that carbon monoxide exposure may contribute to atherosclerosis.

Studies have shown that those with flu-like or neurological symptoms had COHb levels of 10% or greater. (24% and 3 % respectively. Sub-acute carbon monoxide poisoning commonly goes unrecognized and is not diagnosed because it mimics other conditions and is present at the residence / workplace – not the doctor’s office.

Those at higher risk include pregnant women, young children, the elderly, individuals with conditions that already compromise O2 availability, and those that use certain medications and drugs.

For a discussion of CARBON DIOXIDE poisoning which is an entirely different phenomena, see the post here:

http://www.indoorairqualitytestingdallas.com/new-homes-carbon-dioxide-indoor-air-quality-health-hazard/

If you live in the Dallas / Fort Worth, Houston or Austin metropolitan areas and suspect carbon monoxide / dioxide poisoning or other indoor air quality issues, then contact ScanTech Technical Consulting for an evaluation.