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Lexington water staff outlines MS4 monitoring changes, new maintenance manual and countywide sampling plan
Summary
City water-quality staff reviewed changes to the municipal separate storm sewer (MS4) program, including a new priority-based illicit-discharge screening approach, a maintenance manual for stormwater facilities and a countywide water-quality monitoring plan with volunteer participation.
Lexington water-quality staff on Sept. 18 gave planning commissioners an overview of updates to the city’s MS4 (municipal separate storm sewer system) program, including new criteria to prioritize illicit-discharge screening, a maintenance manual for stormwater control facilities and a countywide water-quality monitoring program the division plans to implement after state approval.
Bailey Young, a Water Quality staff member, told commissioners MS4 is the state permit that authorizes Lexington to discharge stormwater runoff into waters of the Commonwealth and that Lexington is one of two Phase 1 communities in Kentucky with a permit tailored to the city. "MS4 stands for municipal separate storm sewer system," Young said, emphasizing the permit’s role because runoff from urban activities can carry oil, pet waste, fertilizer and other pollutants directly to creeks and rivers.
Young said the division continues to perform the permit-required dry-weather screening of larger outfalls and is working with consultant Tetra…
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