GUS040000: Department of the Navy, Naval Base Guam MS4

Discharger Name: Department of the Navy (DON)
Discharger Address: Department of the Navy, Naval Base Guam (NBG), PSC 455, Box 152, FPO AP, Guam 96540-1000
Facility Name: Municipal Separate Storm Sewer System (MS4)
Facility Location Address: Department of Defense Facilities on the Island of Guam
Facility Rating: Minor
Modification issued on: January 30, 2023
Modification effective on: March 1, 2023
This permit was issued on: December 20, 2018
This permit became effective on: February 1, 2019
This permit shall expire at midnight on: January 31, 2024

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NPDES Permit No. GUS040000 Modification (2023): Naval Base Guam Municipal Separate Storm Sewer System (pdf) (1.17 MB, January 30, 2023)
Modified authorization to Discharge Under National Pollutant Discharge Elimination System (NPDES) Permit No. GUS040000 for Department of the Navy Naval Base Guam (NBG) Municipal Separate Storm Sewer System (MS4).
EPA Fact Sheet: Modification of NPDES Permit No. GUS040000 (pdf) (1.82 MB, December 15, 2022)
EPA Fact Sheet for Minor Modification of National Pollutant Discharge Elimination System (NPDES) Permit No. GUS040000 for Department of the Navy Naval Base Guam (NBG) Municipal Separate Storm Sewer System (MS4).
NPDES Permit No. GUS040000 Modification (2022): Naval Base Guam Municipal Separate Storm Sewer System (pdf) (1.23 MB, April 8, 2020)
Modified authorization to Discharge Under National Pollutant Discharge Elimination System (NPDES) Permit No. GUS040000 for Department of the Navy Naval Base Guam (NBG) Municipal Separate Storm Sewer System (MS4).
NPDES Permit No. GUS040000: Department of the Navy, Naval Base Guam Municipal Separate Storm Sewer System (MS4) (pdf) (1.8 MB, 12/20/2018)
Authorization to Discharge Under National Pollutant Discharge Elimination System (NPDES) Permit No. GUS040000 for Department of the Navy Naval Base Guam (NBG) Municipal Separate Storm Sewer System (MS4).
Addendum to NPDES Permit Fact Sheet: Department of the Navy, Naval Base Guam Municipal Separate Storm Sewer System (MS4) (pdf) (1.69 MB, 12/19/2018)
Addendum to EPA Fact Sheet for National Pollutant Discharge Elimination System (NPDES) Permit No. GUS040000 for the Department of the Navy Naval Base Guam (NBG) Municipal Separate Storm Sewer System.
Response to Public Comments: Department of Defense MS4 Facilities on Guam (pdf) (292.88 KB, 06/08/2017)
Response to Public Comments on the Issuance of National Pollutant Discharge Elimination System (NPDES) Permit No. GUR040000 for Discharges from the Municipal Separate Storm Sewer System (MS4) Serving Department of Defense Facilities on Guam.
Response to Supplemental Comments: Department of Defense MS4 Facilities on Guam (pdf) (275.26 KB, 06/18/2018)
Response to Supplemental Comments on the Issuance of National Pollutant Discharge Elimination System (NPDES) Permit No. GUR040000 for Discharges from the Municipal Separate Storm Sewer System (MS4) Serving Department of the Navy Facilities on Guam.