Case 6: Corner Store Stabbing
The contamination (blood) on the property was dispersed throughout the store front to the photo counter and out into the parking lot. This blood spill was in relation to a stabbing that took place in the parking lot and the victim ran into the store for help before the police and EMS 1st responders arrived.
The blood on the scene was splatter across a large area opposed to pooling and a concentration in a small area.
The actual inputs on the project were 8 hours of technician labor, 3 gallons of disinfectant, and 2 sets of personal protective equipment (PPE).
The regulated waste recovered from the project was disposed of in accordance with the Resource Conservation and Recovery Act and a waste manifest was provided upon transfer to a 3rd party disposal company. The blood on the concrete and surrounding surfaces was sprayed down with the primary disinfectant and recovered with absorbent material and scrub pads and discarded as medical waste. The only characteristic that added comfort to the project was that this incident took place in the middle of the night and not during peak traffic hours. Biohazard remediation began around 6 a.m.
All the packaged food such as chips and candy near the door was discarded due to blood splatter near or on the items. Due to the nature of the incident and the area it happened in, this 24-hour store was closed for the duration of the remediation. Site specific challenges were not only was this incident blood related but it was also in the main entry to the establishment.
The blood, bandages, and absorbent powder were recovered and disposed of as medical waste. The tile floor was cleaned and disinfected. The uneven surfaces affected by blood were disinfected and cleaned with 20% peroxide solution and scrub pads. Beware of scrub brushes on surfaces such as the cart above because the bristles can spring when scrubbing and spread blood by droplets thrown from the bristles.
The technicians have been instructed of the hazards associated with the chemicals used, Shockwave MSDS, to comply with OSHA Standard 1910.1200 Hazard Communication.
This transmittal of information is to be accomplished by means of comprehensive hazard communication programs, which are to include container labeling and other forms of warning, material safety data sheets (MSDS), and employee training. The 24-hour store was open for business upon completion of the biohazard remediation.
To restore biological hygiene outside the store, the primary disinfectant was sprayed evenly on the pavement and the doorway’s adjoining surfaces. In
addition to this application of the
primary disinfectant, residual blood stains on the concrete were lifted with 20% peroxide solution.
In summary, the blood affected area stretched across multiple surfaces such as non-porous tile and porous concrete. This area was disinfected multiple times, including doors, hand rails, and counter tops. All the food merchandise in the affected area was disposed of as medical waste. Once all the blood was recovered from surfaces and the bottom portion of shopping carts, the residual stains on the concrete were treated.
Residual stains on concrete were sprayed with a final application (mist not a pool) of peroxide solution (3%) which was left to evaporate.