Before closing, I negotiated installation of a whole home arsenic filtration system, replacement of the water heater, hardwiring of the smoke detectors, and some additional smaller repairs.

You can also test for formaldehyde, Volatile Organic Compounds (VoCs), arsenic in the water, DFAS, gas stove fumes, microplastics, fecal contamination, and so on and so on.It is worth summarizing it this way.  

last time I checked, arsenic-tainted soil doesn't make for an enticing organic garden. 

Passion is best relegated to your hobbies if its not a lucrative passion.As for the tomatoes, like whichever ones you like, but if you start saying one of the best books ever written said you should eat them green and covered in arsenic and anyone who eats a red-one is a stupid sheep, I'm going to call you on it and beg you to not recommend that book.

Before you know it, you'll be testing the paint for lead, the water for arsenic, the air for mold spores, pulling up the subfloor to determine the radon seepage, raking the yard looking for poisonous snakes and camped out with a flashlight and a machete in the yard in the dead of night warding off the threat of a zombie apocalypse while they chat up your other tenants into a class action suit to address your "negligence."

I own a property in Pinal County, Arizona which has a well with water tested at 0.028 mg/L (28 PPB) arsenic. 

I am married with kids and recently learned, after my 6 month old daughter became very sick that she had arsenic poisoning.

I am married with kids and recently learned, after my 6 month old daughter became very sick that she had arsenic poisoning.

Arsenic in the water? 

Be aware that decades ago heavy industry put a lot of arsenic in the air, and toxic levels are still present in the ground in some north end areas.