As others have said, your duty was to your client.

Now, you could come back and do a clearance test. You have the before remediation testing results so doing a clearance test would be fairly simple. But then you would need to issue an All is Clear letter! If you are not properly trained to do clearance testing and or you did not write the remediation plan, you might not want to do this.

If all of the training you have is the Pro-Lab or the ESA one/two day course, I would not do it. In fact I would stop testing for mold, that is not enough training.

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Scott Patterson
Spring Hill, TN
http://www.traceinspections.com