Inspect other BNL elevator shafts for ANSI code violations. Minimal, because of the nature and low volume of the material released. Oil is normally collected in a 5 gallon can at the bottom of the shaft at the rate of 1.5 quarts per month. Typically, the elevator shaft had a foot of water periodically flowing into and out of it. Thus, the HEMO group personnel kept a brick on the can in order to keep it place while it collected oil.
Lubrication oil drains off the elevator lifting shaft during normal operation.
Whenever the sump output caught up with input, the water which previously backflowed into the bottom of the elevator shaft would flow back into the sump. This periodic movement of water tipped the can since someone had either moved the brick from the can or the brick was not put back in place after the pervious month's elevator inspection. The can floated around the shaft each time sump water backed up, and periodically a slug of oil would enter the sump whenever the elevator shaft water would drain. The sump would then pump the oil-water mixture to the recharge basin. It is estimated that about 1.5 quarts of lubrication oil was cleaned up, and the recharge basin.