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Stormwater
Stormwater
• Industry a potential source of pollution
• Most remediation is simple structuring
• Training is critical• Chemical
treatment should be last resort
What are we testing for ?
Called Parameters:• BOD• TSS• TDS• pH• Fecal• Turbidity
Need to be equal or better than the limits set by State and Federal Guidelines
Impaired Waterways often mean stricter limitations
Stormwater Pollution Plans help to ensure practices that will not harm waters
Vocabulary of parameters
BOD- biological oxygen demand -oxygen demand of aerobic bacteria to digest organic waste
7 days to complete test
Raw sewage (200-600 mg/l)
Impaired stream (2-8 mg/l)
High BOD – means lots of organic waste in water and ultimately robs other aquatic life forms
Low BOD – healthier less organic waste for digestion
• Fecal Coliform – bacteria found in solid digestion waste
Sources- human, animal , avian and pulp/plant waste
Presence or Absence based on 100 ml samples/ 24hr
Presence - failure of stormwater permits in many areas. Can cause typhoid fever, Hepatitis A, dysentery and other gastroenterological fun
Absence- Healthy water
Vocabulary of parameters
Vocabulary of Parameters
• TSS- Total Suspended Solids
Solids in the water that do not settle, partly TDS.
Several hours test
Measured in mg/l and levels of acceptable varies waterway to waterway
High – waterways are not being kept to optimal, allowing sediments to be swept by water to waterway, creating silts and other flow inhibition.
Low- stormwater ways are maintained less likely to transport sediment
Vocabulary of Parameter
• Turbidity- the cloudiness or haziness of a liquid
• Usually caused by phytoplankton or sediments
• Higher is not better, often slowing water flow helps reduce turbidity
Vocabulary of Parameter
• Total Dissolved Solids– the amount of inorganic and organic materials in water
• More is worse on wildlife
Vocabulary of Parameters
• pH – a measurement of Hydrogen from 1-14 most water should be 6-8
• Water hardness can be affected by pH
• High pH (basic) – toxic to the aquatic life above 8
• Low pH (acidic)- Toxic to aquatic life below 6, supports more pathogens than high pH
Geography of recharge
Water run off – 3 inches of precipitation
Stormwater Plans
Contain plans for :TestingMonitoring Actions to protect Best Management
Practices Descriptions of sitePotential sources
Training of personnel onsite is required
Stormwater permit included or non-source certification
Update, Update, Update!
Testing & MonitoringWhich Parameters – state dependent!
Depends location and water resources near facility
Time table- can be tricky, put them on a calendar; well ahead of schedule
Reporting requirements- keep for inspections or submit to state
Laboratory requirements- only use certified labs
Inspections- cover all areas of facility, the roofing down.
• Containment walls• Vegetative Swales• Outfall valves• Spill Kits • Outfall diversions• Stormwater ponds• Trench drain to
process• Sediment fencing
• Training with real spill
• Learning to dyke and dam to protect drop inlets
• Spill equipment inventory and tour of locations
Actions & Best Management Practices
Sedimentation stoppers
Erosion control with hay bales
Training- get back to nature, play a little
Show the bad too
Questions ?
