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(BOSTON – July 13, 2020) In an agreement with the U.S. Environmental Protection Agency (EPA) and the state of New Hampshire, the City of Manchester, NH, agreed to put into force a comprehensive set of corrective measures and innovations for the city’s sewer formula that will result in significant relief in wastewater.
The City of Manchester owns and operates a public treatment plant (POTW), adding a wastewater treatment facility (WWTF), which serves the city of Manchester and parts of Bedford, Londonderry and Goffstown, New Hampshire and approximately 155,000 people. The remedy plant’s tax wastewater collection formula has six interceptors that add up to more than 23 miles in length, 11 pumping stations, 4 inverted siphons, thirteen miles of main lines, approximately 385 miles of sewer pipe (45% of which are combined sewers), 15 combined drain drains (CSO) and more than 10,000 looks.
According to the city’s National Pollutant Disposal System (NPDES) permit, the Manchester SewerAge System is legal to send wastewater to WWTF for repair and unloading on the Merrimack River and, when system capacity is affected, to be evacuated through the OSC Exits. in the receiving waters, adding the rivers Merrimack, Piscataquog, Ray Brook and Tannery Brook.
The lawsuit alleges that the City of Manchester violates Section 301 of the Clean Water Act and the terms and situations of its NPDES licence by releasing the combined wastewater from its CSO outlet, pollutants that exceed the amounts permitted by New Hampshire water quality standards.
The proposed law includes a 20.5-year plan to control and reduce sewage overflows in particular, which will improve the water quality of the Merrimack River. The implementation of the plan is estimated at $231 million. The Regulation addresses the disruptions of the Manchester unit’s sewerage system, which, when immersed in rain and stormwater, discharges uncooked sewage, commercial waste, nitrogen, phosphorus and contaminated stormwater into the Merrimack River and its tributaries.
CSO’s two main relief checkpoints will disconnect Brook Cemetery in Manchester, the largest of the five main connected local streams, from the city’s combined sewer system. Manchester will design and build a new 2.5-mile drainage for Cemetery Brook, from Mammoth Road to the Merrimack River to bring rainwater streams and streams, ranging in length from 6 feet wide to five feet of upper square sewer up to 12 feet wide across 10 feet upstream in the term downstream. The City will also design and build projects to separate combined sewers from adjacent spaces to Cemetery Brook Drainage. Together, these sewer drainage and separation projects will cover the city’s largest drainage basin and produce the highest volume of CSOs relief.
Working the proposed consent order also includes the structure of a new drainage and sewer separation in The Christian Brook Drainage Basin, which will remove the third largest creek from the wastewater collection system.
The proposed consent decree also requires the city to implement an OSC release notification and monitoring program, which will come with a direct measure of all emissions from six CSC outlets estimated at more than 99% of all total OSC release volumes in the city. . The City will be required to provide initial and additional notice to the public, adding public fitness and downstream communities, with electronic notification such as publicly available city online page listing and moderate efforts to provide additional notifications.
Proposed regulations also require upgrades to improve the control of counterfeit waste at the wastewater treatment plant to reduce phosphorus emissions.
The Merrimack River is a river of drinking water for more than 500,000 people, is full of bars and trout for fishing, and is used for kayaking, boating and other recreational activities. Many communities in the Merrimack River Basin are environmental justice communities with a large number of minority and low-income residents.
The combined wastewater overflowing from Manchester’s unit sewerage formula is approximately 280 million gallons consistent with the year, or about part of the combined volume of wastewater from all communities to the Merrimack River. According to the proposed consent decree, Manchester will install CSO control projects and innovations in its wastewater treatment services that are expected to reduce the city’s overall annual combined sewerage discharges by approximately 74%, from approximately 280 million gallons to 73 million gallons. Data from more than nine years show E. coli grades ranging from 1,250 to 560,000 colonies consisting of one hundred milliliters, exceeding the amounts consistent with the New Hampshire water quality criteria and the city’s NPDES consistent with a limit of 1,000 colonies consistent with one hundred milliliters.
With the implementation of the proposed consent decree, the following estimated annual discounts on contaminants will occur:
The State of New Hampshire, acting through its Department of Environmental Services, joined him as a co-plaintiff and filed his own claims parallel to the New Hampshire Water Pollution and Waste Disposal Act, NH RSA 485-A.
The proposed consent order is subject to an era of 30-day public comment and court approval after its publication in the Federal Register. Information on the submission of comments can be obtained from the Department of Justice.