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STORM DRAINS _amp; SANITARY SEWERS

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STORM DRAINS _amp; SANITARY SEWERS Powered By Docstoc
					 STORM DRAINS
       &
SANITARY SEWERS
STORM DRAINS
  WHAT IS A STORM DRAIN?

• Drains in the ground that conduct
  water that collects during and after
  rain and snow storms on streets and
  sidewalks to other locations to
  reduce puddling and flooding.

• In Berea, our storm drains are
  directed into the East Branch of
  the Rocky River and eventually flow
  into Lake Erie.
STORM DRAINS
    STORM DRAIN POLLUTION

• Our biggest water quality problems don’t
  come from a discharge pipe. They come
  from stormwater washing off the land—
  roads and rooftops, lawns and construction
  sites, parking lots and driveways.

• The problems include the flooding volumes
  of water that flow off the hard,
  impervious surfaces of our urban and
  suburban landscapes, as well as all the
  pollutants that are washed off these
  surfaces.
WHAT SHOULD GO DOWN A
    STORM DRAIN?
Stormwater, of course!
VARIOUS STYLES OF STORM DRAINS
STORM DRAIN MARKINGS
 NON-POINT SOURCE POLLUTION
• Pollution that cannot be tied to a
  single, identifiable source.
• Common non-point sources:
  –   agriculture
  –   forestry
  –   urban
  –   mining
  –   construction
  –   dams
  –   channels
  –   land disposal
  –   saltwater intrusion
  –   city streets
POLLUTANTS GOING TO WATERWAYS


• These pollutants include:
  –   Fertilizers (agricultural & residential)
  –   Herbicides (agricultural & residential)
  –   Insecticides (agricultural & residential)
  –   Oil
  –   Grease
  –   Toxic chemicals from urban runoff
  –   Litter including cigarette butts &
      chewing gum!
       SANITARY SEWERS

• A sewer which carries sewage (liquid
  or waterborne waste from plumbing
  fixtures) and to which storm and
  surface water, street runoff, and
  groundwater are not admitted
  intentionally.

• A sewer that transports only
  wastewaters (from domestic
  residences and/or industries) to a
  wastewater treatment plant.
SANITARY SEWERS
    WHAT SHOULD GO DOWN A
       SANITARY SEWER?

• Human waste
• Dishwater
• Laundry water
• Reasonable garbage disposal
  waste
• Bath water
WHAT SHOULD NOT GO DOWN
   A SANITARY SEWER?

• Goldfish!
• Solvents such as paint thinner and
  turpentine (toxic chemicals)
• Paints, urethanes & varnishes
• Feminine hygiene products
• Trash
• Drugs
   COMBINED STORM DRAINS &
       SANITARY SEWERS –
  COMBINED SEWER OVERFLOWS
Storm drain on top of sanitary sewer.
     Notice there is no top to the
            sanitary sewer.


           Storm Drain




          Sanitary Sewer
     COMBINED SEWER
       OVERFLOWS
. Older systems have combined
  sanitary/storm drains.
• Problems:
      1. During heavy rains sewage will “overflow”
    into storm drain pipe (and vice-versa) and/or

     2. The storm drain may clog (see photo below)
    backing up the storm water therefore causing
    overflow between sewage and storm water.
    The storm drain (now storm water & sewage)
    flow to the nearest surface water body (river,
    creek, lake, ocean) and contaminate the water.
    Common contaminant is Fecal coliform bacteria.
   COMBINED SEWER
 Hey!
      OVERFLOWS
  I’m
broken!
Fix me…


                And
              Clogged!
               Yuck…
  LINKS FOR STORM DRAINS,
  SANITARY SEWERS & CSO’s

• NEORSD

• Combined Sewer Overflows

• Map of CSO’s
  WHAT CAN YOU DO ABOUT
     THESE PROBLEMS?
• Learn about the topic.
• Don’t pollute!
• Educate others about storm
  drains, sanitary sewers and
  the watershed.
• Volunteer for river clean-
  ups. (May 16th 2009)
• Be a BHS Stenciler!

				
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