Who is the defendant?
The set of defendants responsible for the initial leak include the developer, general contractor, plumber, and manufacturer of the offending water system.
In addition, the repair contractor will be liable if improper methods of cleaning and/or remediating the mold were used.
Many companies have contracts with preferred vendors. The contract should provide insurance information as well as a standard of care with which the repair contractor will pursue his work. In fact, one company guarantees the work of its authorized contractors, which results in the company paying for damage resulting from improper work, even though the insured hired the authorized contractor.
A good source of information is the IICIA. Their publications, especially IICRC S500 (about $11) are good guides for water cleanup standards, and their website also includes a search for certified restoration contractors by geographic area. (Tel: 360-693-5675).