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This Chesapeake Bay Pollutant Reduction Plan (CBPRP) represents the City of Lancaster’s effort to meet one component of the Pennsylvania Department of Environmental Protection (PADEP) Municipal Separate Storm Sewer (MS4) permitting requirements. In particular, this plan includes permitting requirements to reduce polluted stormwater discharges to local surface waters impaired for nutrient and/or sediment, and meet Chesapeake Bay pollutant reductions for stormwater discharges to surface waters located within the Chesapeake Bay watershed. This document was prepared in accordance with the guidance provided in the “National Pollutant Discharges Elimination System (NPDES) Stormwater Discharges from Small Municipal Separate Storm Sewer Systems Pollutant Reduction Plan (PRP) Instructions” (PADEP DOC#3800-PM-BCW0100k; rev. 3/2017).