Contamination Categories and Water Classification Flashcards
6 cards from real Flood Restoration practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Contamination Categories and Water Classification flashcards as text
What defines Category 1 water in the IICRC S500 standard?
Answer: Clean water from a sanitary source that poses no health risk
Category 1 water originates from a sanitary source such as a broken supply line or faucet and poses no immediate health risk if addressed promptly.
Which of the following is an example of Category 2 (gray water) in flood restoration?
Answer: Overflow from a washing machine
Washing machine overflow is classified as Category 2 gray water because it contains detergents, soil, and biological contaminants that can cause illness if contacted or ingested.
What is the critical time threshold after which Category 1 water is considered to degrade to Category 2?
Answer: 24-48 hours
Category 1 water that sits untreated for 24-48 hours can degrade to Category 2 as microbial growth and contamination from wet building materials increase.
Which scenario always results in a Category 3 water classification regardless of the source?
Answer: Any water that has come in contact with sewage or seawater from storm surge
Water contaminated with sewage or seawater (from storm surge flooding) is automatically classified as Category 3 due to the presence of pathogens, toxins, and pollutants.
What additional safety measures are required for Category 3 water restoration compared to Category 1?
Answer: Full PPE including respirators, disposal of porous materials, antimicrobial treatment, and enhanced containment
Category 3 restoration requires full PPE (respirators, suits, gloves), removal of all porous materials, EPA-registered disinfection, and containment to prevent cross-contamination.
How should hardwood flooring be treated in a Category 3 flood event?
Answer: Remove and dispose of as contaminated material
Hardwood flooring in a Category 3 event is considered contaminated throughout and must be removed and discarded because the porous wood cannot be fully decontaminated.