a. Air pollution control: any type of device used to remove particulates and fumes from air. Examples include (but are not limited to):

i.    Fume scrubbers
ii.    Absorber vent scrubbers
iii.   Wet-air scrubbers
iv.   Dry-air scrubbers
v.    Recirculating scrubbers
vi.   Dust collection scrubbers
vii.  Grinding scrubbers
viii.  Melting furnace scrubbers
ix.   Electrostatic precipitator with water
x.    Aqueous sprays

b. Boiler feed/blowdown:

Boiler blowdown is the removal of water from a boiler in order to minimize scale, corrosion, carryover, suspended solids, etc. The water that replaces the blowdown is feedwater.  

c. Condensate:

Condensate is the water that is produced when a boiler is used to heat a facility or product hot water. Once enough heat is produced, the water vapor produced in the combustion process (steam) is condensed back to liquid form, collected, and expelled out of a condensate pipe.

d. Contact cooling water:

This means any water that comes into contact with a product for the purpose of heat transfer (cooling).

e. Non-contact cooling water:

This means water used for cooling which does not come into direct contact with any raw materials, intermediate products, waste products, or finished products.

f. Process:

Process wastewater means any water which, during manufacturing or processing, comes into direct contact with or results from the production or use of any raw material, intermediate product, finished product, by-product, or waste product.

g. Contained in product:

This means water put into a product, and stays in the product (i.e. doesn’t get sent down the drain).

h. Plant and equipment washdown:

This can be any water used in cleaning facility surfaces, floors, rooms, equipment, vehicles, etc.

i. Laboratory: this can mean any wastewater generated as a byproduct of laboratory work. Examples include (but are not limited to):

i.    Product/process laboratory quality control wastewater
ii.    Process stream and product washes
iii.   Water used as a solvent for raw materials
iv.   Water used as a reaction medium
v.    Water of reaction 
vi.   Spent acids/bases
vii.  Contact cooling water
viii. Glassware/equipment cleaning water
ix.   Equipment and floor washes

j. Irrigation and lawn watering:

This refers to water used for landscaping purposes.

k. Sanitary:

Sanitary water is water used for normal, domestic, day-to-day activities. Bathrooms and kitchens are the primary sources of sanitary wastewater.