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Sanitary plumbing collects discharge from the facility restrooms and cafeteria and is tied to the city sanitary sewer system via service connection that is separate from the DAF effluent. Stormwater discharge from the plant roof and catch basins located near the receiving docks is routed into a storm sewer located in the street. Some parts of the site, including the bulk chemical receiving area drain into a storm sewer located on the north side of the property. A schematic of the sewer system layout at the Facility is provided in Attachment 1. Possible Release Scenarios Chemicals stored at the facility are primarily used in the laundry processing and in the wastewater treatment. Smaller amounts of chemicals are used in the boiler room. A complete list of the chemical storage locations is provided in Attachment 2. Wash Floor Chemicals All large bulk storage tanks containing chemicals used in the wash process are located inside of a secondary containment area which can capture any tank leaks or overflows. There are also smaller 55-gallon drums associated with the bulk storage tanks and those are located outside of the concrete containment area and stored near the wash alley. Chemical drums are always kept in or on secondary containment. Some of the possible release scenarios include: • A hose coupling failure or leak from the hose after the product transfer operation is complete • Bulk storage tank overflow inside the chemical storage area. • Container damage during offloading, internal transport or caused by a forklift impact • Chemical piping failure WSI representative or Cintas Partner must be present during all phases of a bulk chemical delivery. At no point should the transfer operation be unattended. Follow chemical delivery instructions provided by the WSI as well as Cintas Safety. There are no drains in the bulk storage area and the 48 inch high wall surrounding the storage area provides secondary containment. Any spills that occur inside the containment area can be removed using a spill kit or, if the spill is large, pumped out for further disposal without affecting the environment.