EXH1169044473

3.2.5 Subsequent WET Testing and Chelation Results ............................ 22 Conclusions.................................................................................................. 29 References ................................................................................................... 31 Appendices .................................................................................................. 35 6.1 Appendix A WET Testing Data Summary ............................................. 37 6.2 Appendix B Photographs....................................................................... 41 6.3 Appendix C Source Tracing Results ..................................................... 45 6.4 Appendix D Matrix for Interpreting Chelation Test Results ................... 49 List of Tables Table 1 WET Testing Summary ........................................................................ 12 Table 2 Additional WET Test Metrics ............................................................... 12 Table 3 Chelation Testing Results .................................................................... 27 Table 4 Synthetic Runoff WET Test Results ..................................................... 28 AP, 044475 Table 5 SyntheticRunoffMetals Concentrations(mg/l).................................... 28 List of Figures Figure1 STIAStormDrainageMap .................................................................... 9 Figure2 Boxplotof Zinc in STIA StormwaterSamples..................................... 14 Figure3 SDN1 SubbasinMap .......................................................................... 17 Figure4 SamplingLocations............................................................................. 18 Figure5 Copperin InitialScreeningGrab Samples.......................................... 22 Figure6 Zinc in InitialScreeningGrab Samples............................................... 23 Figure7 Copper incompositeSamples............................................................ 27 Figure8 Zinc in compositesamples.................................................................. 28 AR 044476 ACKNOWLEDGEMENTS The Portthanksthe staffof TaylorAssociatesfor their diligence,skilland ingenuityin stormwatersamplecollection,AquaticResearch, Incorporatedfor theirflexibilityand availabilityinhandlingtheanalyticalwork,and Pararnetrix, Incorporatedfor theirhighqualitysupportin WET testingandforassistingwith the novelapproachfor source-tracing. AR 044477

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Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]