Sewage Damage

Sewage mitigation must begin with a safety and health inspection of the site for protection of workers and occupants. Determine the category, source, contamination location, areas affected, structural and contents contamination levels, penetration and salvability of structural systems and materials, contents penetration and salvability, restoration resources and procedures, and disposal considerations. All must be considered in the evaluation. It is vital that all hidden areas of exposure (wall cavities, crawl spaces, insulation, closets, under cabinets, the HVAC system, etc.) be identified as well as the obvious areas.

Dangers of Sewage Damage

Sewage remediation poses several challenges for the remediator. There are different types of sewage: domestic sewage, industrial/agricultural sewage, and sewage from non-point sources such as ground or ocean/river/lake water. Sewage may contain over 120 potential viruses including hepatitis A or B, rotavirus, adenoviruses, and Norwalk viruses. Sewage may also contain parasites including Giardia and Cryptosporidium, Entameba histolytica, along with a variety of roundworms and tapeworms. Bacteria may include virulent strains of gram-negative organisms such as Salmonella, Campylobacter, and E. coli, and rick. The gram-negative bacteria also contain endotoxins that are released at the time of the cell death and destruction. Attempts at salvaging sewage contaminated highly porous materials (including carpet and upholstery) can liberate extensive amounts of endotoxins, allergens, and infectious substances, posing a considerable risk for individuals with compromised immune systems, such as infants, children, the elderly, and patients recovering from disease or chemo-therapy.

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Steps to Solving Your Mold Problem

Inspection - Thorough visual inspection of all possible contaminated areas, attic, crawlspace, basement, HVAC and Duct System, floors, walls, ceilings.

Pre-testing and Analysis performed by AFTERDISASTER, an independent indoor air quality hygienist, prior to the start of remediation.

Containment and Protection of structure and contents not yet affected:

  • Limited: Use polyethylene sheeting ceiling to floor around affected area with a slit entry and covering flap; maintain area under negative air pressure with HEPA filtered fan unit. Block supply and return air vents within containment area.
  • Full: Use two layers of fire-retardant polyethylene sheeting with one airlock chamber. Maintain area under negative pressure with HEPA filtered fan exhausted outside of building. Block supply and return air vents within containment area.

Removal and safe disposal of unsalvageable materials (usually porous materials such as drywall, insulation and ceiling tiles).

High Efficiency Particulate Air (HEPA) Vacuuming of all surfaces

Wet cleaning of affected areas using detergents recommended for mold remediation.

Application of an antimicrobial approved by EPA for mold remediation.

Drying of the structure to safe moisture levels (determined by hygrometer measurement).

Final HEPA Vacuuming of all surfaces.

Clearance inspection and testing by AFTERDISASTER.

Removal of containment.

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