Town of Scituate Massachusetts - Authorization to Discharge Under the National Pollutant Discharge Elimination System Medium Wastewater Treatment Facility General Permit - Effective April 1, 2023

Sep 29, 2026

Uploaded by Terk

Authorization granting the Town of Scituate, Massachusetts, permission to discharge treated effluent from the Scituate Wastewater Treatment Plant to receiving waters including Tidal Creek to the Herring River within the South Coastal Watershed. Authorization operates under the Medium WWTF GP and specifies effluent limits, monitoring frequency, and sampling types for key parameters such as CBOD5, TSS, pH, nutrients, PFAS analytes, toxicity testing, and ambient monitoring requirements. Effective April 1, 2023, with listed attachments and facility-specific terms incorporated by reference.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages20

Reading Time50 min

AccessFree to download

Authorization Overview

Compliance with CWA and Coverage

Discharge Location and Receiving Waters

Effective Date and Incorporated Attachments

Applicability and Coverage of the WWTF GP

General Permit Requirements

Effluent Limitations and Monitoring Requirements

Parameter Monitoring Tables

AUTHORIZATION TO DISCHARGE UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM MEDIUM WASTEWATER TREATMENT FACILITY GENERAL PERMIT In compliance with the provisions of the Federal Clean Water Act, as amended,(33 U.S.C.§§ 1251 et seq.; the "CWA"), Town of Scituate, Massachusetts is authorized to discharge from the facility located at Scituate Wastewater Treatment Plant 161 Driftway Scituate, MA 02066 to receiving water named Tidal Creek to Herring River South Coastal Watershed in accordance with effluent limitations, monitoring requirements and other conditions set forth in this authorization and the Medium WWTF GP (General Permit No. MAG590000) . This authorization shall become effective on April 1, 2023. For applicable attachments see the complete version of the Medium WWTF General Permit: Part VII – Standard Conditions Attachment A – Freshwater Acute Toxicity Test Procedure and Protocol, February 2011 Attachment B – Freshwater Chronic Toxicity Test Procedure and Protocol, March 2013 Attachment C – Marine Acute Toxicity Test Procedure and Protocol, July 2012 Attachment D – Marine Chronic Toxicity Test Procedure and Protocol, November 2013 Attachment E – List of Eligible Facilities Attachment F – Reassessment of Technically Based Industrial Discharge Limits Attachment G – NPDES Permit Requirement for Industrial Pretreatment Annual Report Attachment H – PFAS Analyte List Attachment I – Facility-Specific Permit Terms Attachment J – Pretreatment Program Development Requirements I. Applicability and Coverage ofthe WWTF GP Supplementary information provided in the complete version of the Medium WWTF GP. II. General Permit Requirements A. Effluent Limitations and Monitoring Requirements During the period beginning on the effective date and lasting through the expiration date, the Permittee is authorized to discharge treated effluent through Outfall Serial Number 001 to the Tidal Creek to the Herring River. The discharge shall be limited and monitored as specified below at the end of all treatment processes, including disinfection or dechlorination, or at an alternative representative location approved by EPA and the Massachusetts Department of Environmental Protection (MassDEP), that provides a representative sample of the effluent. The receiving water and the influent shall be monitored as specified below. Table 1. Effluent Limitations and Monitoring Requirements | Effluent Characteristic | Discharge Limitation | | | Monitoring Requirement1,2 | | | --- | --- | --- | --- | --- | --- | | Parameter | Average
Monthly | Average
Weekly | Maximum Daily | Measurement Frequency | Sample Type3 | | Rolling Average Effluent Flow 4 | 1.6 MGD | --- | --- | Continuous | Recorder | | Effluent Flow4 | Report MGD | --- | Report MGD | Continuous | Recorder | | CBOD5 | 10 mg/L
133 lb/day | 15 mg/L | Report mg/L | 1/Week | Composite | | CBOD5 Removal | ≥ 85 % | --- | --- | 1/Month | Calculation | | TSS | 10 mg/L
133 lb/day | 15 mg/L | Report mg/L | 1/Week | Composite | | TSS Removal | ≥ 85 % | --- | --- | 1/Month | Calculation | | pH Range7 | 6.5 – 8.5 S.U. | | | 5/Week | Grab | | Enterococci8 | 35 colonies/ 100 mL | --- | 130 colonies/100 mL | 1/Week | Grab | | Fecal Coliform Bacteria8 | 14 organisms/ 100 mL | --- | 28 organisms/100 mL | 3/Week | Grab | | Total Recoverable Copper | 4 µg/L | --- | 6 µg/L | 1/Month | Composite | | Total Recoverable Nickel | 8 µg/L | --- | --- | 1/Month | Composite | | Total Recoverable Zinc | 86 µg/L | --- | 95 µg/L | 1/Month | Composite | | Dissolved Oxygen | ≥ 6.0 mg/L | | | 1/Week | Grab | | Effluent Characteristic | Discharge Limitation | | | Monitoring Requirement1,2 | | | --- | --- | --- | --- | --- | --- | | Parameter | Average
Monthly | Average
Weekly | Maximum Daily | Measurement Frequency | Sample Type3 | | Total Kjeldahl Nitrogen11
(April 1 – October 31)
(November 1 – March 31) | Report mg/L
Report mg/L | --- | Rep

FAQs

What facility and receiving waters are covered by this authorization?

The authorization covers discharges from the Scituate Wastewater Treatment Plant at 161 Driftway, Scituate, MA 02066, to receiving water named Tidal Creek to Herring River in the South Coastal Watershed.

When does this authorization become effective?

The authorization becomes effective on April 1, 2023.

What types of requirements are set out for discharge under the permit?

The authorization sets effluent limitations and monitoring requirements, including measurement frequency and sample types, and includes other conditions set forth in the authorization and the Medium WWTF GP.

Sep 29, 2026

Uploaded by Terk