← Back to All Case Studies CASE FILE #UNATTENDED_DEATH_BLOODBORNE_CLEARANCE
Environmental & Biohazard Chicago, IL • January 2026 (3 Business Days)

Unattended Death & Pathogen Clearance in Multi-Unit Apartment

Decomposition fluids from an unattended death penetrated 120 sq ft of tongue-and-groove hardwood flooring and seeped into concrete floor joists between the 3rd and 2nd floors.

Triage Similar Situation
INITIAL SITE AUDIT (PRE-CLEAN) CONTAMINATED
Initial Pathogen Tier OSHA Category 3 Bio
Pre-Clean ATP Luminometer 9,450 RLU
Airborne Odor Volatiles Putrescine / Cadaverine
Ceiling Leakage Below Active Discoloration
→
CLEARANCE PROTOCOL
POST-REMEDIATION (CLEARANCE) PASS / SANITARY
Post-Decon ATP Swab 14 RLU (Clinical Clearance)
Bacterial Culture Plate 0 CFU Growth @ 48h
Air Volatile VOCs < 0.05 ppm
DOT Hazmat Manifest 4 Red Bags Certified

Containment & Equipment Deployed

  • • Dual 6-mil poly zippered containment airlock chamber
  • • OmniTec 1000 CFM Negative Air Machine with carbon HEPA
  • • Hygiena EnSURE Touch ATP Luminometer
  • • Ozone Shock Chamber + Hydroxyl Radical Generator

Chemical Formulations & Dwell Protocol

  • • EPA List N Sporicidal Disinfectant (Peracetic Acid / Hydrogen Peroxide)
  • • Multi-enzyme blood protein digestant (pH 8.5)
  • • Odor-encapsulating penetrating polymer sealant

Itemized Financial Audit & Settlement

Total Project Invoiced: $5,420.00
Insurance Coverage Payout: $4,420.00
Client Net Out-of-Pocket / Deductible: $1,000.00 (HO-6 Condominium Policy)
Policy Settlement: HO-6 Unit Owner Property Policy (Sudden Peril)

Primary Engineering Takeaway

"Unattended death remediation is legally covered by property insurance in 90%+ of cases, protecting families from tragic out-of-pocket expenses."

The Underlying Challenge

A medical examiner release was issued 6 days post-discovery. The property management company faced immediate tenant evacuation threats in adjoining units due to persistent cadaveric biological odor penetrating HVAC risers.

The Scientific Remediation Protocol

Certified technicians established negative pressure containment at -0.03 inches water column. Saturated parquet hardwood was mechanically lifted and bagged as regulated medical waste under DOT 49 CFR. Concrete slab was treated with peracetic acid foam, deep extracted, heated to 130ยฐF, and sealed with epoxy moisture barrier.

Quantitative Verification & Clearance Result

Third-party industrial hygiene swab testing returned 14 RLU (hospital standard is < 30 RLU). Zero odor migration into adjacent residential units was confirmed by PID VOC monitor.