Presenter: Alejandro Escobar, Tetra Tech 1

Session Overview Dos and Don’t will be shown with theoretical or real examples. Based on most common problems in CWNS 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. 2

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

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. 4

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. 5

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

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. 7

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 8

Discharge FOLLOW THE WATER 9

Permits 10 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.

Costs and Documents 11 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.

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

Costs and Documents 13 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.

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

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! 15

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