LDG performed the infiltration / inflow analysis for the Jersey Shore Borough.
The Borough of Jersey Shore owns and operates a wastewater treatment facility
with a capacity of 1.03-million gallons per day (gpd) to provide wastewater
treatment and disposal for Borough residents and portions of Porter Township.
The Borough also owns and operates a sanitary sewer system which collects
wastewater within the Borough and conveys it to the plant for treatment. The
Porter Township Municipal Authority owns and operates a collection system
within the Township, which is connected to the Borough at three locations. At
each connection point a flow meter measures the quantity of sewage entering
the Borough from the Township.
Total dry weather flows treated at the wastewater treatment plant average
between 600,000 and 700,000 gpd. During wet weather events, sewage
flows increase significantly due to excessive inflow and infiltration in the
Borough’s and Township’s sanitary sewer system. Daily flows in excess of 4-
million gpd have been recorded at the wastewater treatment plant. A bypass
pipe, installed at the treatment plant, is used to bypass partially treated
wastewater around the secondary treatment system to handle these excessive
flows. Treatment plant operators typically activate the bypass when flows at the
plant exceed 2.15-million gpd. Bypassing of partially treated wastewater is a
violation of the Clean Streams Law and the Clean Water Act.
In 2002 the Borough experienced bypass events at the wastewater treatment
plant. Borough operations staff reported these bypass events to Pennsylvania
Department of Environmental Protection (DEP) in accordance with reporting
requirements. Considering the number and quantity of the bypass events, DEP
prepared a Consent Order and Agreement (COA) to address high flows within
the Borough’s sanitary sewer system. The COA required the Borough to address
their Infiltration/Inflow problem by completing the following activities:
- Update current Corrective Action Plan.
- Conduct a Treatment Plant Hydraulic Capacity Study.
- Install a flow meter on the bypass.
- Prepare a High Flow Operation and Management Plan.
Larson Design Group (LDG) assisted the Borough in negotiating the terms of the
COA with DEP. The COA was signed by the Borough. The Borough retained
LDG to assist in compliance with the COA.