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• What are the Characteristics of a Successful Mold Cleanup Project
• How does a building "pass" a clearance inspection?

Here we describe the Characteristics of a Successful Mold Cleanup Project - what should the owner or mold test consultant check? This document is a chapter of the Mold Action Guide which provides an easy to understand step-by-step guide for dealing with toxic or allergenic indoor mold and other indoor contaminants: what to do about mold "mildew," moisture, in your house or office, building-related illness, involving your physician, treatment, sick building investigators, reduction of irritants, and special products to help clean buildings and air. Extensive, in-depth articles about mold and other indoor air quality concerns are organized at our Mold Information Center © Copyright 2008 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.

SUCCESSFUL MOLD TEST: How do We Define Successful Post-remediation Mold Test Laboratory Results

In the living area we should find in surface, dust, air, or other samples no more than incidental occurrence of the problem mold or allergens previously found at the property. There should be no significant presence of toxic or allergenic spores or other allergens indicating a remaining mold reservoir.

Air tests, while not a reliable overall indicator of building condition, should, if used for mold screening, show indoor mold levels at or below typical outdoor levels or at levels associated with various studies of "clean" buildings.

Warning: some investigators risk making erroneous conclusions if they attempt to compare directly levels or counts of indoor Penicillium/Aspergillus spore levels with outdoor Penicillium/Aspergillus spore levels in air samples.

With some exceptions, it is almost impossible to determine the species of these genera in an air sample. A previous report on a property I was asked to investigate showed that the indoor Penicillium/Aspergillus spore level was equal to the outdoor level and that both were at 8000 spores/M3 of air.

But a detailed investigation of the samples disclosed that the outdoor spore level was in fact a species of Penicillium while the indoor species was Aspergillus niger which, at this level I considered an indicator of incomplete cleaning traced, ultimately to incomplete demolition. In this case the original "count comparison" of indoor to outdoor Penicillium/Aspergillus spores was like comparing apples and oranges. It was nonsense.

More Reading:
Mold Investigation and Mold Test Lab Reports: What A Valid, Useful Mold Investigation Report Should Include
Mold Classes, Levels - Mold Hazard levels, Mold Spore Count Validity, Interpreting Mold Counts, and Classes of Mold

See our laboratory report for definitions of dominant/significant particles, present particles, and incidental particles.

Use links just below or links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.

THE MOLD ACTION GUIDE
MOLD DOCTOR?
MOLD EXPERT, WHEN TO HIRE
DO IT YOURSELF MOLD CLEANUP
HOW TO FIND MOLD
MOLD CLEANUP GUIDE
MOLD KILLING GUIDE
FLOODS & MOLD CLEAN/PREVENT
MOLD CLEARANCE INSPECTIONS
  CLEARANCE PROCEDURES
  ACCEPTABLE MOLD LEVEL
  VISUAL CHARACTERISTICS
  SUCCESSFUL MOLD TEST
AFTER THE MOLD CLEANUP
MOLD PREVENTION GUIDE
OTHER IAQ ISSUES

Technical Reviewers & References

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• Daniel Friedman - InspectAPedia.com ^TM Website Author/Editor
• Critique, contributions wanted: Contact Us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.

Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.

More expert information on this topic

More Information on Building Diagnostic Inspections and Repairs

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The Mold Information Center: What to Do About Mold in Buildings, When and How to Inspect for Mold, Clean Up Mold, or Avoid Mold Problems

Use this simple, economical mold test kit by following our instructions on how to collect and mail mold samples to our lab

Environmental Inspection, Testing, & Diagnosis On-Site IAQ, Gas, Air Testing, Mold Investigation, Sick Building Diagnosis, Lab Services, & Remediation Plan Preparation - indoor air quality testing, problem source determination, supporting lab work, written remediation plan addressing removal of environmental and other hazards and prevention of their recurrence.

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