Chapter 9

Clearance of Oil and/or Grease

9.1 GENERAL

9.1.1 Free deposits of these materials may be blotted up with rags, sawdust, sand, etc., and the residue then scrubbed with detergent using a rotary power broom. It will likely be necessary to remove the deteriorated portions of the oil-impregnated asphalt areas in order to successfully repair or seal the surface.

9.1.2 Oil-soaked and stained areas on concrete surfaces are washed to remove imbedded material using a detergent compound of sodium met silicate and resin soap applied with water and scrubbed with a power broom. The loosened contaminants are flushed away with water. For aspartic concrete pavements, an absorbent or blotting material, such as sawdust or sand, combined with a powdered alkaline degreaser, is used.