§ 41-31. Protection of sewer system.

All industries which store or maintain a significant quantity of chemicals shall protect the sanitary and storm sewers from accidental spills. The owner or user shall maintain and provide facilities to prevent accidental discharge of prohibited materials at the owner's or user's expense. This protection shall consist of a wall or berm around all four (4) sides of the storage area. The construction material for the walls or berm shall be compatible with all stored materials or chemicals. The capacity of this containment area shall be sufficient to contain the contents of the largest container or storage tank plus an additional ten (10) percent except where a containment area that stores containers with a capacity of fifty-five (55) gallons or less. This area shall have the capacity to contain the volume of twenty-five (25) percent of all the containers or, if the storage area has containers with a volume greater than fifty five (55) gallons, it shall have a capacity to retain the volume of twenty-five (25) percent of the total number of fifty-five-gallon barrels or the volume of the largest storage container, whichever is the larger volume. If this area is to be located external to any existing structure, the owner/operator shall maintain it by:

(1)

Keeping all containers closed;

(2)

Maintaining and securing bung caps in drums used for storage;

(3)

Placing a protective awning or covering over the storage area for protection from stormwater; and

(4)

Installing a drain valve to drain rainwater. The operator shall secure this valve and keep it locked in the closed position except when necessary to drain rainwater. The operator shall insure, by whatever means is necessary, that any rainwater drained is unpolluted.

(Ord. No. 8140, § 1, 3-20-03)