Clean Watersheds Needs Survey (CWNS) 2012 CWNS Technical Data Dos and Don'ts

1. Clean Watersheds Needs Survey (CWNS) 2012CWNS Technical Data Dos and Don'ts Presenter: Alejandro Escobar, Tetra Tech

2. Session Overview • Dos and Don’t will be shown with theoretical or real examples. • Based on most common problems in CWNS 2008. • Most for traditional centralized collection and treatment. • I will answer questions as they are asked. • Will have some time at the end for questions related to dos and don’ts not related to the ones presented.

3. Location • Do: Enter a street address. • Don’t: Enter a PO Box.

4. Population • Do: Enter population for collection systems. • Don’t: Try to enter population for treatment plants. • Treatment Plants have population automatically populated by the DEP based on the population from upstream collection systems.

5. Population • Do: All population entered should be real data. • Don’t: Enter population placeholders. (e.g., 1, 2) • Need for population placeholders are usually an indication of other technical problems with the facility. • New facility types should eliminate the need for placeholders.

6. Population • Need for population placeholders are usually an indication of other technical problems with the facility.

7. Flow • Do: Keep present design and projected design flows the same unless there is a change of increase capacity. • Don’t: Make the future design flow less than the present design. • Exception: We have seen facilities’ excess capacity being retrofitted for nutrient control. This would require a change of increase level of treatment.

8. Discharge • Do: Make collection systems discharge to treatment facilities, other collection systems, or interceptors. • Don’t: Try to make collection systems discharge to surface water, evaporation, etc. • Don’t: Make on-site systems discharge to surface waters. (Hint: discharge method for on-site systems is NOT required) FOLLOW THE WATER

9. Discharge FOLLOW THE WATER

10. Permits • Do: Make permit type match facility/project type. • Don’t: Assigns stormwater permits to POTWs, and vice versa . • Do: Enter an NPDES permit for all point source facilities/project with a discharge to waters of the US. (ocean discharge, outfall to surface waters, overland flow with discharge) • Don’t: Enter NPDES permits as state permits.

11. Costs and Documents • Don’t: Run cost curves and document needs for the same category (some exceptions may apply). • Allowed: Documented costs for increase capacity and cost curve for increase level of treatment. • Don’t: Run cost curves for needs not justified by documents. • Not allowed: documentation showing a need to correct I/I used to justify running an increase level of treatment cost curve for the treatment plant.

12. Costs and Documents • Do: Enter each document in the DEP. • Don’t: Combine documents into a single document DEP entry.

13. Costs and Documents • Do: Ensure that all projects/needs are accounted for only once. The same project costs may be in multiple documents. • Don’t: Enter new documents/needs until you have removed outdated documents from the DEP.

14. Costs and Documents • Do: Enter all eligible needs as of January 1, 2012. • Don’t: Enter costs for components funded or completed before January 1, 2012. If you already have the money then it’s not a need!!

15. Resources • CWNS DEP is your best friend. • If the DEP does not allow you to do something there is a good chance there is a technical problem with your facility. • CWNS review team. • It is better to ask questions than submit incorrect facilities for review. • CWNS 2012 User Manual • Coming Soon!

16. Questions?