When Standard SSES Investigations Are Not Enough: The Use of Creative SSES Investigation Techniques and Innovative Analysis to Identify Pockets of Extraneous Flow

To comply with MassDEP 314 CMR 12.00 requirements, the Town commissioned a Sewer System Evaluation Study (SSES). Typical SSES investigation techniques produced inconsistent results because of a multitude of factors including diverse geologic conditions and numerous pumps stations. A unique approach was required. Key components to the success of the study included meeting with various Town departments to gain institutional knowledge about local geology encountered during sewer installation, a long-term hydrograph analysis, and thorough overnight fieldwork investigations to isolate problematic areas.