Sci-Tek is providing on-call environmental engineering services for the Philadelphia Housing Authority (PHA), the largest housing agency in the Commonwealth of Pennsylvania, and the fourth largest in the nation, serving nearly 80,000 residents. PHA is organized under the laws of the Commonwealth of Pennsylvania to develop, acquire, lease and operate low-rent housing programs. Task orders completed so far include Harrison Plaza Rehabilitation, HUD Environmental Reviews, Ridge Avenue Assessment, and Phase IA Archaeological Investigations.