NPDES Tools and Information

  • Permitting Policy for Instream Stations
    • Date: February 9, 2017
    • Description:  Currently, permittees are required to monitor instream stations at the same frequency as the permitted outlets. In certain circumstances, permittees may request reduced monitoring of instream outlets. This policy memoorandum sets forth the requirements and procedures for reduction of monitoring frequency for instream stations.

  • Permitting Policy for Precipitation-Induced Outlets
    • Date: November 28, 2016
    • Description: This policy memorandum sets forth the procedures and practices for permitting precipitation-induced outlets, including but not limited to on-bench outlets, that are used to control and/or treat discharges that primarily only occur due to precipitation events. This policy is being developed to provide consistency by establishing permitting procedures that coincide with other permitting policies, procedures and guidance.
  • Aluminum Translator Workbook Version 3.12
    • Date: April, 2010
    • Revised: November, 2013
    • Description: This spreadsheet permorms normality test based on Shapiro-Wilk's method and contains the following worksheets: Instructions, S-Wilk Test, Water Analysis, Al Translator.
  • Permitting Policy for Precipitation-Induced Outlets
    • Date: November 28, 2016
    • Description:  This policy memorandum sets forth the procedures and practices for permitting precipitation-induced outlets, including but not limited to on-bench outlets, that are used to control and/or treat discharges that primarily only occur due to precipitation events. This policy is being developed to provide consistency by establishing permitting procedures that coincide with other permitting policies, procedures and guidance.