CWEA Environmental Compliance
Prohibited Discharges (Clean Water Act)
Pollutants that create a fire or explosion hazard in the sewer or POTW are prohibited.
MSDS Acronym
Material Safety Data Sheet
Hydrogen Sulfide Hazards
Safety hazards include toxic gases.
Lead Acetate Paper Use
Used to detect hydrogen sulfide.
Flow Measuring Device for Full Pipe
A Venturi meter can be installed in a pipe flowing full.
Oil & Grease Sample Container & Preservative
• Container: Glass (plastic is less ideal due to adsorption).
• Preservative: Acidify to pH <2 (HCl or H₂SO₄) and keep at ≤6°C.
Chain-of-Custody Form
Tracks sample possession and handling from collection through analysis.
BOD Test Purpose
Measures oxygen demand for microorganisms to break down organic pollutants.
Confined Space Definition
, • Large enough to enter/work in.
• Restricted entry/exit.
• Not designed for continuous occupancy.
Industries with High Suspended Solids
Breweries produce high suspended solids in wastewater.
Safety in Manhole Inspections
Two people must be above to respond in emergencies.
Major Pollutant from Circuit Board Shops
Copper is a primary concern.
Protective Gear for Hazardous Chemicals
Check the MSDS for guidance.
Gasoline/Solvents in Sewers
They pose an explosion hazard.
Protective Gear in Plating Shops
• Eye goggles/face shield.
• Chemical-resistant gloves.
• Overalls.
pH 5 vs. pH 7 Hydrogen Ion Concentration
pH 5 is 100× more acidic (higher [H⁺]) than pH 7.
High pH Wastewater Neutralization
Add sulfuric acid (H₂SO₄).
Street Work Safety Signs
Prohibited Discharges (Clean Water Act)
Pollutants that create a fire or explosion hazard in the sewer or POTW are prohibited.
MSDS Acronym
Material Safety Data Sheet
Hydrogen Sulfide Hazards
Safety hazards include toxic gases.
Lead Acetate Paper Use
Used to detect hydrogen sulfide.
Flow Measuring Device for Full Pipe
A Venturi meter can be installed in a pipe flowing full.
Oil & Grease Sample Container & Preservative
• Container: Glass (plastic is less ideal due to adsorption).
• Preservative: Acidify to pH <2 (HCl or H₂SO₄) and keep at ≤6°C.
Chain-of-Custody Form
Tracks sample possession and handling from collection through analysis.
BOD Test Purpose
Measures oxygen demand for microorganisms to break down organic pollutants.
Confined Space Definition
, • Large enough to enter/work in.
• Restricted entry/exit.
• Not designed for continuous occupancy.
Industries with High Suspended Solids
Breweries produce high suspended solids in wastewater.
Safety in Manhole Inspections
Two people must be above to respond in emergencies.
Major Pollutant from Circuit Board Shops
Copper is a primary concern.
Protective Gear for Hazardous Chemicals
Check the MSDS for guidance.
Gasoline/Solvents in Sewers
They pose an explosion hazard.
Protective Gear in Plating Shops
• Eye goggles/face shield.
• Chemical-resistant gloves.
• Overalls.
pH 5 vs. pH 7 Hydrogen Ion Concentration
pH 5 is 100× more acidic (higher [H⁺]) than pH 7.
High pH Wastewater Neutralization
Add sulfuric acid (H₂SO₄).
Street Work Safety Signs
