Water Treatment Residuals Options Assessment

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Sunshine Coast Regional District

The Sunshine Coast Regional District (SCRD) operates the Chapman Creek Water Treatment Plant which provides drinking water for local residents.  The drinking water treatment process results in the production of water treatment residuals.  Approaching the limit of their storage capacity for the water treatment residuals, the SCRD approached SYLVIS to characterize its water treatment residuals and to investigate short and long-term storage and management options.

SYLVIS’s scope of work included an investigation of the water treatment residuals management area, sampling and characterization of the water treatment residuals, regulatory review, assessment of the quality water treatment residuals against the criteria of the Code of Practice for Soil Amendments, development of preliminary options, and completion of a technical memorandum.

In evaluating management options, SYLVIS established a technical advisory committee composed of the SCRD and neighboring land owners, the Sechelt Indian Band (SIB) and Lehigh Materials.  The technical advisory committee, facilitated by SYLVIS, encouraged dialogue and resulted in an operational water treatment residuals drying trial.  The drying trial, completed on adjacent Lehigh Material property, with the agreement of the SIB, provided a short-term management option for the SCRD’s water treatment residuals.  An integral part of the trial was an environmental monitoring program, designed by SYLVIS to address stakeholder concerns.  The monitoring program was designed to assist the SCRD in ensuring their water treatment residuals management activities are protective of the environment. It also functioned to answer stakeholder questions and determine operational specifications for the establishment of a long-term management program.

SYLVIS identified water treatment residuals management opportunities, and together with key stakeholders evaluated these opportunities, implemented an operational scale trial and answered stakeholder questions, enabling a low-cost long-term water treatment residuals management program.