Clean Water Act discharge permit · NPDES GUR10000M

UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE, Umatac, GU: NPDES GUR10000M discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE, held by Core Tech - Hawaiian Dredging, LLC, holds NPDES permit GUR10000M. EPA’s file records it issued March 6, 2018 and expiring February 15, 2022.

UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE, Umatac, Guam: Coverage under a general permit GUR10000M, held by Core Tech - Hawaiian Dredging, LLC; Construction stormwater; Administratively continued (past its expiration date and still in force until reissued); issued March 6, 2018, term to February 15, 2022, by U.S. EPA.

Guam holds 190 Construction stormwater coverages of this permit type in EPA’s file; 2 were issued before GUR10000M. Core Tech - Hawaiian Dredging, LLC holds 2 permits in Guam.

Other permits held by Core Tech - Hawaiian Dredging, LLC

P3105 APSI MUNITION STORAGE IGLOOS (PHASE 3), Yigo: GUR10002N, issued January 5, 2021

Coverages issued nearest GUR10000M

February 12, 2018: J-001B FINEGAYAN UTILITIES AND SITE IMPROVEMENTS, Finegayan, GUR10000K, held by Granite-Obayashi
February 21, 2018: ILEARN CHARTER ACADEMY, Dededo, GUR10000L, held by Core Tech International Corporation
December 5, 2018: KEPCO MANGILAO SOLAR PROJECT, Mangilao, GUR100010, held by SAMSUNG E&C AMERICA, INC.
January 3, 2019: APRA MEDICAL/DENTAL CLINIC, Naval Base, GUR100013, held by CADDELL-NAN A JV
October 25, 2019: J-755 URBAN COMBAT TRAINING, Yigo, GUR10001K, held by CHK LLC
June 2, 2020: BEQ J-031 & J-033, Yigo, GUR10002B, held by CADDELL-NAN JV
August 12, 2020: FY20 MCON P-459 BEQ H, Yigo, GUR10002G, held by CADDELL-NAN JV

UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE among its neighbors

Its county holds 82, 4 of them major permits; GUR10000M is a minor permit.

Other permits in the county

ACHO LATTE, Dededo: GUR10006Z, minor permit, permit term to February 16, 2027
AGANA SEWERAGE TREATMENT PLANT, Hagatna: GU0020087, major permit, discharging to PACIFIC OCEAN, permit term to May 31, 2018
AGAT STP, Agat: GU0020222, major permit, discharging to TIPALAO BAY PHILIPPINE SEA, permit term to December 31, 2022
APRA HARBOR WWTP, Apra Harbor Naval Base: GU0110019, major permit, discharging to TIPALAO BAY PHILIPPINE SEA, permit term to April 30, 2022
APRA HARBOR WWTP, Agat: GUL110019, minor permit, permit term to December 31, 2025
APRA MEDICAL/DENTAL CLINIC, Naval Base: GUR100013, minor permit, permit term to February 15, 2022
BAZA GARDENS WWTF, Yona: GU0020095, minor permit, discharging to TOGCHA RIVER, permit term to November 30, 2013
BEQ J-031 & J-033, Yigo: GUR10002B, minor permit, permit term to February 15, 2022
BUENA VISTA ENVIRONMENTAL, Piti: GUU001014, not classed
CABRAS MARINE CORPORATION, Piti: GU0020397, minor permit, permit term to January 30, 2018

What the register holds for UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE: its NPDES ID, its permit type and status, its dates, its address in Umatac, Guam. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES GUR10000M.

Identity

Facility as filed	UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE
Permittee as filed	Core Tech - Hawaiian Dredging, LLC
NPDES ID	GUR10000M
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	March 6, 2018
Expiration date	February 15, 2022
Issuing agency	U.S. EPA
Address	Umatac, GU 96918

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES GUR10000M.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES GUR10000M.

Inspections

EPA’s inspection file holds no inspection for NPDES GUR10000M.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES GUR10000M.

Watch this permit

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

Of the 41 storm water construction permits in Guam, 0.0% have a violation on file, and UMATAC - MERIZO WASTE WATER TREATMENT PLANT UPGRADE in Umatac is among them. Among the 31 storm water construction permits in Guam, 6.5% were issued before this permit, which is included in that count. The register counts 41 storm water construction permits in Guam with this permit included, and the permittee is Core Tech - Hawaiian Dredging, LLC.