Question
I am considering the Biobarrier root system fabric installed inground in my yard.......is this hazardous to humans ?
and would i have to disclose that i used this if i was to sell?
appreciate any reply that fits this situation

Answer
One of the most visible and unique inhibitor barriers is the controlled release herbicide fabric. Depending upon soil temperatures, the root growth control effect can last across long periods of time. One of the most common commercial inhibitor barriers is a herbicide impregnated, slow release product developed originally by the United States government. The government created three different products using this technology: anti-root sewer pipe gaskets, geotextile fabric with herbicide impregnated nodule barrier, and an anti-root fouling plastic drip irrigation emitter. All are available in the marketplace.

The geotextile fabric root barrier has been successfully developed, marketed and used. This inhibitor barrier and its active ingredient will not systemically harm other vegetation, just root tips that come in close contact. The herbicide used in this inhibitor barrier is trifluralin (dinitroaniline family) which inhibits cell division in root tips by preventing chromosomal spindle formation. This herbicide is considered a preemergent since it inhibits root tip growth from seeds. Trifluralin is effective as a contact and a vapor phase herbicide within the soil. It does not accumulate into higher animal food chains because it is not taken-up into the tree. Trifluralin is not detectable beyond 10cm from the barrier into the soil, and so, is considered to have no environmental impact beyond the root control area.  

For more than 30 years, trifluralin has been used between rows of food crops to prevent weed growth; because of this extensive use and numerous research projects, much is known about it. It has an EPA toxicity rating of class IV, the 損ractically nontoxic?class (acute oral: LD50, (rats) > 10,000 mg/kg), making it slightly more toxic than sugar but less than salt. Trifluralin has an extremely low water solubility of 0.3 ppm, making it unlikely to leach. It tightly attaches to soil, so it doesn抰 tend to migrate, and it decomposes in six months or less, so it doesn抰 persist in the ground.

It will not harm animals but should be kept out of water. Use plastic type gloves when applying the barrier to keep from staining your hands. Read the label and follow all the instructions.
It is a safe chemical in the barrier.