Dust Settling on Outside Patio or Furniture? I was sitting on my porch in San Francisco watching kids play on the wooden deck and started to wonder, “is the dust on my porch contaminated with lead dust? If so, how best to clean it up?” So I did a little experiment and tested for lead

Is a Clean Crawlspace Really That Important? Crawlspaces are generally not what anyone would consider “clean.” When was the last time you went into a crawlspace? It’s typically a dark, dank environment where critters and odors scare away even the bravest DIY building owners. Often old construction materials and cardboard boxes are crammed down below,

DIY Box Fan Filter & Air Quality Experiment Here in San Francisco and surrounding areas kids are stuck indoors during this smoke wave caused by our wild fires with little or no air filtration. In San Francisco the school buildings are older and are not setup to have building wide air filtration. Nor can cash-strapped

Effects of Airtight Construction on Lab Pressurization Most labs and clean rooms require airtight construction to create differential pressure with respect to adjoining spaces. Labs are usually maintained at slightly negative pressure to keep the chemicals used in the labs from migrating to adjacent spaces. Clean rooms, on the other hand, have to be kept

Sick Building Syndrome and Building Related Illness What is the Difference? Sick Building Syndrome and Building Related Illness are two distinct diagnoses. People often use the term “sick building” when referring to a property, but buildings don’t get sick – people do. I believe if there are numerous people suffering from Sick Building Syndrome (SBS) it’s okay to