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1 <br /> MONITORING EUGENE'S STORMWATER <br /> The NDPES regulations require an ongoing water quality monitoring program for the 5 -year term of the <br /> permit. The monitoring program is described in Schedule B of the NPDES permit, and Chapter 8 of the <br /> SWMP. The permit specifies the requirements for monitoring (sampling) during storm events. For the <br /> purposes of the SWMP, the term "monitoring" is broadened to include water quality monitoring (sample <br /> collection), monitoring of activities (such as construction) in a watershed, monitoring changes in a <br /> watershed, or monitoring the success of best management practices. <br /> The monitoring plan has been organized into three program elements: (1) storm event sampling, (2) ambient <br /> receiving water monitoring, and (3) data management, analysis, and reporting. Monitoring program <br /> activities were developed to guide the implementation of each of these program elements. <br /> Storm Event Sampling <br /> The following activities will be conducted over the five year permit period: <br /> • Collect stormwater samples from land use and stream stations. <br /> • Evaluate the need to relocate existing stations. <br /> • Use the collected data to refine the pollutant loadings model. <br /> • Conduct visual observation monitoring. <br /> • Develop and implement monitoring to detect problem areas and potential sources. <br /> • Track the implementation of structural BMPs, and assess the effectiveness of BMPs. <br /> First Year Activities <br /> Six monitoring stations were established to collect data for the NPDES permit application. These stations <br /> are located so the data will be representative of major land uses in the City (residential, commercial and <br /> industrial). ODOT also established a sampling site in the Eugene area. As required by the NPDES permit, <br /> samples were collected during three storm events at each of the six stations during the permit year. <br /> Future Activities <br /> To complement the water chemistry data, visual observations of activities occurring in the monitoring <br /> station catchments will be made during each storm sampling event, starting in permit year two. In addition, <br /> grab samples will be collected at key tributaries or point sources in the sampling station basins. This <br /> information will be used to identify potential problem areas upstream of the land use stations. <br /> Ambient Receiving Water Monitoring Program <br /> 8 <br />