Industrial Environmental Management

Appendix DFrequently Asked Questions and Answers: Water Quality Model, Dispersion Model and Permits

D.1 Example Chain‐of‐Custody form for Use by POTWs

D.2 Water Quality Models

• Cornell Mixing Zone Expert System (CORMIX):

  “User's Manual for CORMIX: A Hydrodynamic Mixing Zone Model and Decision Support System for Pollutant Discharges into Surface Waters”, By Jirka, G.H., Donekar, R.L., and Hinton, S.W. School of Civil and Environmental Engineering, Cornell University, Ithaca, N.Y. 14853

  CORMIX1, is used to predict and analyze environmental impacts of submerged single port discharges to lakes, rivers and estuaries.

  CORMIX2, may be used to predict plume characteristics of submerged multiport discharges.

  U.S. Environmental Protection Agency

  TMDL Modeling Toolbox

  Watershed and Water Quality Modeling Technical Support Center

  U.S. EPA – NERL

  Athens, GA 30605

• A Dynamic One‐Dimensional Model of Hydrodynamics and Water Quality (EPDRiv1)
• Stream Water Quality Model: QUAL2K: TMDL Development

D.3 Frequently Asked Questions

Proposed General NPDES Permit for Industrial/Municipal Wastewaters Dischargers that Meet Objectives/Criteria at the Point of Discharge

1. What kind of discharge or facility would be eligible for coverage under the General NPDES Permit?

   Treatment facilities that treat domestic wastewater and meet water quality objectives/criteria at the point of discharge or “end‐of‐pipe.” ...