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Long-Term Ti 7.1.D. - Page 67 <br /> With regard to municipal stormwater trash management,indicators are intended to detect progress <br /> towards trash load reduction targets and solving trash problems. Ideally,indicators should be <br /> robust and able to detect progress that is attributable to multiple types of trash control measure <br /> implementation scenarios.Assessment results should also provide Permittees with an adequate <br /> level of confidence that trash load reductions from MS4s have occurred,while also assessing <br /> whether trash problems in receiving waters have been resolved. Indicators must also be cost <br /> effective,relatively easy to generate,and understandable to stakeholders. <br /> Primary and secondary indicators that SMCWPPP Permittees will use to answer core management <br /> questions include: <br /> Primary Indicators: <br /> 1-A Reduction in the level of trash present on-land and available to MS4s <br /> 1-B Effective full capture device operation and maintenance <br /> Secondary Indicators: <br /> 2-A Successful levels of trash control measures implementation <br /> 2-B Reductions in the amount of trash in receiving waters <br /> In selecting the indicators above,the City of Redwood City in collaboration with SMCWPPP and <br /> other SMCWPPP Permittees recognize that no one environmental indicator will provide the <br /> information necessary to effectively determine progress made in reducing trash discharged from <br /> MS4s and improvements in the level of trash in receiving waters. Multiple indicators were therefore <br /> selected. <br /> The ultimate goal of municipal stormwater trash reduction strategies is to reduce the impacts of <br /> trash associated with MS4s on receiving waters. Indicators selected to assess progress towards this <br /> goal should ideally measure outcomes (e.g.,reductions in trash discharged).The primary indicators <br /> selected by SMCWPPP are outcome-based and include those that are directly related to MS4 <br /> discharges.Secondary indicators are outcome or output-based and are intended to provide <br /> additional perspective on and evidence of,successful trash control measure implementation and <br /> improvements in receiving water condition with regard to trash. <br /> As described in Section 2.2,trash is transported to receiving waters from pathways other than <br /> MS4s,which may confound our ability to observe MS4-associated reductions in creeks and <br /> shorelines. Due to this challenge of linking MS4 control measure implementation to receiving water <br /> conditions,the receiving water based indicator is currently considered a secondary indicator. <br /> Evaluations of data on the amount of trash in receiving waters that are conducted over time <br /> through the Pilot Assessment Strategy will assist the City in further determinations of the <br /> important sources and pathways causing problems in local creeks,rivers and shorelines. <br /> 4.1.3 Pilot Assessment Methods <br /> This section briefly summarizes the preliminary assessment methods that the City of Redwood City <br /> will implement through the SMCWPPP Pilot Strategy to generate indicator information described in <br /> the previous section.Additional information on each method can be found in the SMCWPPP Pilot <br /> Trash Assessment Strategy submitted to the Water Board by SMCWPPP on behalf of the City. <br /> 59 <br />