A containment cellar collects petroleum products leaked in a vicinity of a conductor pipe at an oil drilling site. The containment cellar has a body, a pipe, and a pumping orifice. The body has bottom and side surfaces to define an interior chamber to surround a length of the conductor pipe. The bottom surface includes an aperture to receive the conductor pipe. The surfaces are composed of materials substantially impermeable to the petroleum products. The side surface has sufficient strength to maintain integrity of the interior chamber when the containment cellar is disposed at least partially beneath a surface of the earth. The pipe extends through the interior chamber. The pumping orifice is coupled with the pipe and adapted for coupling with a pump to extract the leaked petroleum products from the interior chamber.