How do I know when the mold clean up is finished?

Pacific IAQ has three requirements for post-remediation verification; the building materials must be cleaned to a dust-free condition (if there is dust and debris, then there are still mold spores), the material must be dry (below 15% moisture content), and the laboratory analysis must indicate that the air and/or surface samples are reflective of normal fungal ecology.“Normal fungal ecology” simply means that the airborne mold spore concentrations inside should be similar in species composition and distribution to the outdoor air samples.  Pacific IAQ does not necessarily require the inside concentrations to be lower than outside concentrations because outside mold spore concentrations vary from minute to minute and it takes time for inside concentrations to reach an equilibrium. We look instead for spikes, or elevations, in specific mold types that indicate a mold reservoir in the home.Surface samples are far more important than air samples. After a remediation project is complete, there should be no mold growth on the affected surfaces. This does not mean that there are no spores, as spores can be found everywhere; it means that there is no actual growth and that the mold spores on the surface are reflective of normal fungal ecology.