Surtreat’s TPSII and TPSIV were applied to four separate 50 sq feet parcels. Of these four parcels, (pads) pad one, which is closest to the generator, was a mix of both old and freshly poured concrete. The outside perimeter of pad one, approximately one foot wide was made up of old concrete. The middle of the pad was made up of freshly poured concrete. The second pad, which is forty feet off the taxi line towards the water, was made up of all freshly poured concrete. The third pad is also made up of freshly poured concrete and is located along the river towards the runways fifty feet right of pad two. The fourth pad is located back across the taxi line towards the hanger and adjacent to pad one. Pad four consisted of all old concrete.