1. IF IT’S NOT A HOUSE, IT’S HIGH STRENGTH Ron Suchecki Hoot Systems, LLC Lake Charles, LA

2. Domestic Water Use AWWARF - 1999

3. Typical Domestic Sewage • 200mg/L BOD/TSS (100-300) • 40-70mg/L Total Nitrogen • 1999 study, 75% of water use is NOT Toilet use

4. Progress In Water Savings • Pre 1985 – Toilets were 5.0-7.0 GPF • 1985-1991 Standard was 3.5 GPF • 1991-1996 Standards were 3.5 to 1.6 GPF • 1996-Present Standard is 1.6 • Today there are new models that Range from single flush of 1.28 Gallons, and Dual Flush of less than a gallon & 0.5 GPF (#1)

6. Other Water Savings • Washing Machines • Past • 30-40 Gallons per load • Current – • HE Top Load - 23 Gallons • HE Front load - 15 Gallons • Lavatory Faucets • Shower Heads

7. What Does This Mean ? • Sewage Strength • Water Consumption • These Same Factors apply outside the home as well.

8. Commercial Structures • Bathing 19 % • No Laundry 22% • Leaks 14% • Not from bathrooms 55% • Bathroom Now - (Toilets/Sinks) may account for up to 100% of use • Type of Building may increase strength • Food Prep • Food Waste • Self Serve

9. Ultra Flow Fixtures • Water Conservation High Profile • Remodeling at Higher Rate than Residential • Waterless Urinals

10. How to Determine Flow & Strength • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best

11. How to Determine Flow & Strength • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best

16. Onsite Estimation Tables • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best 2. Estimation from Like Properties • Size • Location • Community all become major factors

17. Onsite Estimation Tables • Three Main Approaches to Design 1. Existing Data (Flow & Strength Samples) – Best 2. Estimation from Like Properties • Size • Location • Community all become major factors 3. State Tables or National Tables or Calculators

25. CIDWT Resources

28. Exit to CIDWT Form

33. BOD Loading Soda • Soda – 75,000 mg/L BOD • 75,000 BOD @32 oz. = • Diluted into 2,000 gallons – 9.5 mg/L BOD • Diluted into 500 gallons – 38 mg/L BOD

40. Any Questions