I have used this company for personal use and for my client. The company is Tru Pro. The phone number is 1-877-767-6653. They test and also do remediation.
Another company that only does remediation, Mac Mold Abatement-Jason, the phone number: 610-842-0338.
I recommend you compare the estimates thoroughly since the "best price" may not be the best company. I recommend both.