6.1 Property Conditions and Environmental Hazards

Why Environmental Hazards Dominate the National Exam

The national portion treats environmental hazards as a federal and common-law topic, not a state-specific one. Examiners want to know whether you can identify the hazard, recall the federal trigger date or threshold, and explain who pays and who discloses. Memorize the hazard, source, health effect, and the key number for each item below. Most missed questions come from confusing two hazards or guessing the wrong year.

Lead-Based Paint (the most tested hazard)

Lead-based paint was banned for residential use in 1978. Any home built before 1978 triggers the federal Residential Lead-Based Paint Hazard Reduction Act (Title X, 1992), enforced through the EPA/HUD Lead Disclosure Rule.

For target housing (pre-1978 residential), the seller or landlord must:

• Disclose any known lead-based paint and provide available records/reports.
• Give the EPA pamphlet "Protect Your Family From Lead in Your Home."
• Provide a 10-day period for the buyer to conduct a lead inspection or risk assessment (the buyer may waive it in writing).
• Include the Lead Warning Statement and signatures in the contract.

Exception: housing built 1978 or later, studio/0-bedroom units, and housing certified lead-free are exempt. Rentals are covered too, but a new disclosure is not required every lease renewal if conditions are unchanged.

Worked Example: The 1978 Trap

A salesperson lists a duplex built in 1977 and a condo built in 1981. The 1977 duplex is pre-1978 target housing, so the full lead disclosure, pamphlet, and 10-day inspection window all apply. The 1981 condo is exempt.

If the buyer of the 1977 duplex signs a contract on June 1 and wants no inspection, the agent must still document the written waiver of the 10-day period. A common exam trap: the law requires the opportunity to inspect, not an actual inspection. Failing to provide the pamphlet or window can expose the seller and agent to treble (triple) damages under Title X.

Other Major Hazards Compared

Radon Numbers You Must Know

Radon is colorless and odorless, measured in picocuries per liter (pCi/L). The EPA recommends action at 4.0 pCi/L or higher and suggests considering mitigation between 2.0 and 4.0. The standard fix is an active sub-slab depressurization system that vents soil gas above the roofline.

Worked numeric: A home tests at 6.2 pCi/L. Because that exceeds the 4.0 action level, mitigation is recommended. After installing a sub-slab system, a retest reads 1.8 pCi/L — now below 2.0, so no further action is needed. Exam tip: radon is a regional issue tied to geology, not building age.

Asbestos and Mold Details

Asbestos was widely used before the 1980s in insulation, pipe wrap, floor tile, roofing, and acoustic "popcorn" ceilings. It is only dangerous when friable — when it crumbles and releases microscopic fibers into the air. Because removal can disturb fibers, the recommended response is often encapsulation (sealing it in place) rather than tearing it out. Removal must be done by licensed abatement contractors.

Mold grows wherever moisture collects: behind walls, under floors, around leaks, and in poorly ventilated bathrooms or basements. There is no single federal mold exposure standard. The exam answer is always to identify and correct the moisture source first; cosmetic cleanup without fixing the leak guarantees regrowth. Disclose known mold problems as you would any material defect.

Underground Storage Tanks, CERCLA, and Brownfields

Two federal terms appear on the national exam. CERCLA (the Comprehensive Environmental Response, Compensation, and Liability Act, 1980) created the Superfund and imposes strict, joint-and-several, and retroactive liability on owners for cleanup of hazardous contamination — meaning a current owner can be liable even without fault. An innocent landowner defense may apply if the buyer performed appropriate due diligence (a Phase I environmental site assessment) before purchase.

Underground storage tanks (USTs) — common on former gas stations or farms — can leak fuel and contaminate soil and groundwater. A brownfield is a property whose redevelopment is complicated by real or perceived contamination. Agents should flag any of these for environmental due diligence rather than offer opinions on cleanup costs.

The Agent's Practical Duty

An agent is not an environmental expert and should never guarantee that a property is hazard-free. The correct conduct is to disclose what is known, provide required federal materials (such as the lead pamphlet), and recommend qualified professional testing for radon, mold, asbestos, or soil contamination. Steering a buyer away from inspection to speed a sale is a liability trap. When in doubt, advise the buyer in writing to obtain a professional assessment and document that recommendation in the file.

Wetlands

Wetlands are land areas saturated by water that support aquatic vegetation. They are regulated under the federal Clean Water Act, jointly administered by the U.S. Army Corps of Engineers and the EPA. Filling, draining, or developing wetlands generally requires a federal permit.

For the exam: wetlands reduce a parcel's developable area and can block construction even on otherwise buildable lots. An agent who knows a parcel contains delineated wetlands should advise the buyer to verify permitting before relying on a site plan. Recent federal rulings have narrowed which waters qualify, but the Corps-plus-EPA permitting framework remains the tested answer.