At approximately 9pm, 07.16.08, NYFD responds to a call on the corner of St. Nicholas and 145th. According to witnesses on the scene, a container of acid was found in a residential building. You can see the container in the picture on the right, which was on the sidewalk in front of the building being inspected.
11 units showed up, lights twirling with dozens of firefighters, police, and hazmat men milling about. A quick illustrative video below.