The following primers are available on biometrics and privacy:

Relationship Between Biometrics and Privacy

Privacy Risks of Biometric Technologies: BioPrivacy Risk Ratings

Privacy Risks in Biometric Deployments: the BioPrivacy Impact Framework

BioPrivacy Best Practices

One of the consulting services that International Biometric Group (IBG) offers, which often goes hand-in-hand with a Feasibility Study, is a Privacy Impact Assessment.