Take a certification course with the Institute of Inspection, Cleaning and Restoration. The IICRC is a nationally recognized organization that will certify that you are qualified to perform restoration duties involved with different degrees of water damage. (See resources.)
Take a free online course. The EPA provides a web-based course that provides nine chapters and a self test after each chapter. The course is based on a publication titled "Flood Cleanup and the Air in your Home," which you can download and print. The course provides detailed examples of mold growth and what remediation steps you can take depending on the type of water damage.
Consider other self-training opportunities. You can incorporate the EPA 's guidelines for "Mold Remediation in Schools and Commercial Buildings" into your training. The booklet includes detailed procedures for various degrees of water damage and makes distinctions between salvageable and non-salvageable materials. You can also purchase a copy of the "Standard and Reference Guide for Professional Water Damage Restoration" (2006) on the IICRC website.