King County Lower Duwamish Waterway Source Control Annual Report Year 2017 December 2018 This page intentionally left blank King County Lower Duwamish Waterway Source Control Annual Report Year 2017 Prepared for: Washington State Department of Ecology Submitted by: King County Department of Natural Resources and Parks King County Department of Transportation King County Department of Executive Services For more information contact: Debra Williston Water and Land Resources Division King County Department of Natural Resources and Parks 201 S. Jackson St. Seattle, WA 98104-3855 [email protected] This information is available in alternative formats upon request at 206-477-5371 (voice) or 711 (TTY) This page intentionally left blank King County Lower Duwamish Waterway Source Control Annual Report - 2017 ACKNOWLEDGMENTS A team of representatives from the King County Wastewater Treatment Division, Water and Land Resources Division, King County International Airport, Roads Services Division, Permitting and Environmental Review, and Local Hazardous Waste Management Program allFacilities contributed Management to the production Division, Public of this Health−Seattle report. The production & King County, was managed Department and of coordinated by Debra Williston of the Water and Land Resources Division, Science and Technical Support Section. CITATION King County. 2018. King County Lower Duwamish Waterway Source Control Annual Report-Year 2017. Prepared by Department of Natural Resources and Parks, Department of Transportation, and Department of Executive Services. Seattle, Washington. King County i December 2018 This page intentionally left blank King County Lower Duwamish Waterway Source Control Annual Report - 2017 TABLE OF CONTENTS Acknowledgments ................................................................................................................................................. i Citation ....................................................................................................................................................................... i Table of Contents .................................................................................................................................................. ii Figures ...................................................................................................................................................................... iv Tables........................................................................................................................................................................ iv Appendices ............................................................................................................................................................. iv Acronyms ................................................................................................................................................................. v Executive Summary............................................................................................................................................. vi 1.0 Introduction ................................................................................................................................................. 1 1.1 LDW Source Control Area ........................................................................................................... 1 1.2 Internal Coordination Efforts .................................................................................................... 1 2.0 Wastewater Treatment Division ......................................................................................................... 3 2.1 CSO Control Program .................................................................................................................... 3 2.2 RainWise Program ......................................................................................................................... 3 2.3 WaterWorks Grant Funding ....................................................................................................... 4 2.4 Industrial Waste Program .......................................................................................................... 6 2.4.1 Listing of Industrial Users ............................................................................................... 7 2.4.2 Listing of Inspections ........................................................................................................ 7 2.4.3 Collaborations ...................................................................................................................... 7 2.4.4 Special Studies and Incident Responses .................................................................... 7 2.5 Sediment Management Program .............................................................................................. 9 2.5.1 Source Tracing Activities ................................................................................................. 9 2.5.2 Summary of Source Control Studies ..........................................................................12 2.5.3 Summary of Regulatory Review Actions .................................................................13 3.0 Water and Land Resources Division ................................................................................................14 3.1 Stormwater Services ...................................................................................................................14 3.1.1 Mapping Updates ..............................................................................................................14 3.1.2 Business Inspections .......................................................................................................14 3.1.3 Participation in Duwamish Inspectors Group .......................................................17 King County ii December 2018 King County Lower Duwamish Waterway Source Control Annual Report - 2017 3.1.4 Source Tracing Activities ...............................................................................................17 3.2 Local Hazardous Waste Management Program ...............................................................18 4.0 Department of Transportation ...........................................................................................................20 4.1 King County International Airport ........................................................................................20 4.1.1 Industrial Stormwater General Permit Compliance............................................20 4.1.2 MS4 Permit Compliance .................................................................................................22 4.1.3 Source Tracing Activities and Remediation ...........................................................23 4.2 Roads Services Division .............................................................................................................28 5.0 Other King County Departments and Divisions ...........................................................................29 5.1 Facilities Management Division ..............................................................................................29 5.2 Department of Permitting and Environmental Review ................................................30 5.3 Environmental Health Services Division ............................................................................31 5.3.1 Public Health– ............................31 5.3.2 Public Health -Site Wastewater Program ...........35 –Seattle & King County Solid Waste Program 5.4 Solid Waste Division ...................................................................................................................36 Seattle & King County On 6.0 References ..................................................................................................................................................38 King County iii December 2018 King County Lower Duwamish Waterway Source Control Annual Report - 2017 FIGURES Figure 1. Lower Duwamish Waterway Source Control Area. ........................................................ 2 Figure 2. Sites with Regulatory Oversight by Public Health– Solid Waste Program. ...............................................................................................................33 Seattle & King County TABLES Summary of King County CSO Control Project Milestones in the LDW for 2017. ................................................................................................................................................. 3 Summary of Source Tracing Samples Collected from the Combined Sewer System (2016 and 2017). ........................................................................................................10 Business Source Control Inspection Results. ..................................................................15 Water Quality Complaint Investigations in 2017. .........................................................17 LHWMP Site Visits in 2017 in the LDW Drainage Area. ..............................................19 ISGP Discharge Monitoring Data Annual Averages for 2017. ...................................21 KCIA Tenants and ISGP Numbers. .......................................................................................22 Number of Source Tracing Samples Collected from KCIA Source Control Areas in 2017. ..............................................................................................................................23