cso sampling and monitoring data inventory€¦ · 04/08/1998 · mercury phenanthrene...

________________________________________________________

CSO Sampling and Monitoring Data InventoryTask 5 Report

Sediment Management Plan

Prepared by the

Sediment Management Plan Project TeamKing County Department of Natural Resources

Final Draft 08/04/98

1

1 Introduction

This report presents an inventory of sampling and monitoring data collected in the vicinity ofseven King County combined sewer overflow (CSO) outfall locations. Each of the CSO outfalllocations noted below is included on the Washington State Department of Ecology (Ecology)contaminated sediment site list (Ecology, 1996).

� Brandon Street� Chelan Avenue� Denny Way� Duwamish Pump Station/Diagonal Avenue� Hanford Street� King Street� Lander Street

A map of King County CSO locations is presented in Figure 1-1, on the following page.

Included in the inventory are chemical, bacteriological, toxicological, and biological data forsediment, CSO effluent, and receiving water. Also included are special studies such ashydrodynamic data collection or habitat assessment. Table 1-1 summarizes the sedimentchemical constituents regulated under Ecology’s Sediment Management Standards (Chapter 173-304 WAC).

The inventories of data from King County’s database encompass the ten-year period from 1988to 1998 and are provided in tabular format in Tables 2-1 through 8-1. Sampling locations areshown in Figures 2-1 through 8-1. Data from studies performed by other agencies or the privatesector are included by reference only. When available, sampling locations for non-King Countystudies have been included in Figures 2-1 through 8-1. Chemistry and most bacteriological dataare maintained on King County’s Laboratory Information Management System (LIMS) database.Other King County data are maintained in hard copy reports and Excel� spreadsheets.

Sections 2 through 8 of this report each include a brief description of the CSO, a narrative ofsampling and/or monitoring performed by King County, references to studies performed by otheragencies or the private sector, a spreadsheet table of King County data, and a map showing bothKing County and other sampling locations. CSO information and structural diagrams areincluded as Appendix A to this report.

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Figure 1-1

Table 1-1Regulated Sediment Chemical ConstituentsSediment Management StandardsChapter 173-204 WAC

Metals LPAHs HPAHsArsenic Acenaphthene Benzo(a)anthraceneCadmium Acenaphthylene Benzo(a)pyreneChromium Anthracene BenzofluoranthenesCopper Fluorene Benzo(g,h,i)peryleneLead 2-Methylnapthalene ChryseneMercury Phenanthrene Dibenzo(a,h)anthraceneSilver FluorantheneZinc Indeno(1,2,3-c,d)pyrene

Pyrene

Chlorobenzenes Phthalates Miscellaneous Organics1,2-Dichlorobenzene Benzyl Butyl Phthalate Dibenzofuran1,4-Dichlorobenzene Bis(2-ethylhexyl) Phthalate Hexachlorobutadiene1,2,4-Trichlorobenzene Diethyl Phthalate N-NitrosodiphenylamineHexachlorobenzene Dimethyl Phthalate Total PCBs

Di-N-butyl PhthalateDi-N-octyl Phthalate

Ionizable OrganicsBenzoic AcidBenzyl Alcohol2,4-Dimethylphenol2-Methylphenol4-MethylphenolPentachlorophenolPhenol

NotesLPAHs - Low Molecular Weight Polynuclear Aromatic Hydrocarbons

HPAHS - High Molecular Weight Polynuclear Aromatic HydrocarbonsPCBs - Polychlorinated Biphenyls

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4

2 Brandon Street CSO

The Brandon Street CSO regulator and outfall stations are located at 5241 East Marginal WaySouth. The outfall for this CSO discharges along the eastern shoreline of the main channel of theDuwamish River. This outfall is exposed during normal low tides and, during extremely lowtides, can discharge directly across exposed intertidal sediment. Sampling locations in thevicinity of the Brandon Street CSO outfall are shown in Figure 2-1.

2.1 King County DataAn inventory of King County data collected near this CSO is provided in Table 2-1.

Sediment samples were collected for chemical analysis from one station in 1990 for the sedimentbaseline monitoring requirement of the King County’s NPDES permit. Sediment samples werecollected from four stations in 1992 as part of the Elliott Bay/Duwamish Restoration Program.Sediment samples were collected weekly at one station for 17 weeks during 1997 for the KingCounty CSO Water Quality Assessment (WQA) project. Chemical analysis of these samplesincluded parameters regulated under Ecology’s sediment management standards (Ecology, 1995)

CSO effluent samples were collected in 1990 as part of the NPDES permit baseline monitoringprogram. CSO effluent was also sampled extensively during 1996 and 1997 for the WQAproject. These samples were analyzed for chemical and bacteriological parameters as well asmicrotox bioassays and low-level mercury.

Receiving water was sampled weekly for 26 weeks at six locations near the outfall in 1996 and1997 as part of the WQA project. In addition to standard chemical analysis of receiving water,semipermeable membrane devices (SPMD) were deployed just offshore of the outfall to collecttime-integrated samples for organic analysis. Low-level mercury analysis was also performed onsamples from one location offshore of the CSO.

Tissue samples were collected for chemical analysis from both transplanted and wild musselslocated near the outfall. Mussel samples were also analyzed for bacteriological parameters priorto, during, and just following a discharge event. Tissue samples were collected offshore of theoutfall during a fish sampling program performed in mid-river channel by the Washington StateDepartment of Fish and Wildlife. The fish sampling program was undertaken using an ottertrawl from the Fish and Wildlife research vessel. Dungeness crab, English sole, and Shinerperch were analyzed for organics, metals, and lipid content.

2.2 Other Sources of DataOne sediment station in the center channel of the Duwamish River near the Brandon Street CSOwas sampled in 1988 for the Elliott Bay Action Program (Puget Sound Estuary Program, 1988).Five sediment stations were sampled in 1997 for the NOAA Duwamish River sediment study(National Oceanographic and Atmospheric Administration, 1997). Additional sediment stationswill be sampled in 1998 as part of a large EPA investigation of the Duwamish River.

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Figure 2-1

Table 2-1Inventory of King County DataBrandon Street CSO

Sediment ChemistryStudy Year Ammonia BNAs Butyltin Mercury Metals Methyl Hg PCBs Pesticides PSD Solids Sulfides TOC VolatilesNPDES CSO Sediment Baseline Study (1 grab) 1990 0 1 0 1 1 0 1 1 0 1 1 1 0EB/DRP CSO Sediment Baseline Study (4 grabs) 1992 0 4 0 4 4 0 4 4 0 4 0 4 4CSO Water Quality Assessment (17 grabs) 1997 17 12 13 17 17 17 12 0 17 17 17 17 0

CSO Effluent Chemistry and Microbiology Number of SamplesStudy Year Ammonia BNAs Conductivity Demands Fec. Coliform Hardness Mercury Metals Microtox Nitrate/Nitrite PCBs Pesticides pH Solids TemperatureNPDES CSO Baseline Monitoring 1990 0 1 0 4 4 0 4 4 0 0 4 4 0 4 0CSO Water Quality Assessment 1996-97 34 31 58 35 35 34 89 81 105 16 10 9 57 71 59

Receiving Water Chemistry and Microbiology Number of SamplesStudy Year Ammonia BNAs Conductivity Diss. Oxygen Demands Fec. Coliform Hardness Mercury Metals Nitrate/Nitrite PCBs Pesticides pH Solids TemperatureCSO Water Quality Assessment 1996-97 192 36 216 120 6 192 6 24 244 132 2 2 192 384 216

Tissue Chemistry Number of SamplesStudy Year BNAs Butyltin Lipids Mercury Metals PCBs Pesticides SolidsCSO Water Quality Assessment (Total Samples) 1996-97 29 29 29 29 29 29 9 11 Dungeness Crab 1997 2 2 2 2 2 2 0 2 English Sole 1997 6 6 6 6 6 6 0 6 Shiner Perch 1997 3 3 3 3 3 3 0 3 Transplanted Mussels (dry season) 1996 6 6 6 6 6 6 6 0 Transplanted Mussels (wet season) 1997 6 6 6 6 6 6 0 0 Wild Mussels (dry season) 1996 3 3 3 3 3 3 3 0 Wild Mussels (wet season) 1997 3 3 3 3 3 3 0 0

Specialized SamplingSemipermeable membrane devices (SPMD) were deployed in April, 1997, at two depths near the Brandon Street CSO outfall in association with the CSO Water Quality Assessment. The SPMD were analyzed for polynuclear aromatic hydrocarbon compounds, PCBs (Aroclorsand congeners), and chlorinated pesticides.

NotesCSO - Combined Sewer Overflow

BNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsMethyl Hg - Methyl Mercury

PCBs - Polychlorinated BiphenylsPSD - Particle Size Distribution (Grain Size)TOC - Total Organic Carbon

NPDES - National Pollutant Discharge Elimination System

Number of Samples

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7

3 Chelan Avenue CSO

The Chelan Avenue CSO regulator station is located at 3455 Chelan Avenue Southwest. Theoutfall for this CSO discharges into the West Waterway of the Duwamish River approximately40 yards offshore of the west bank. This outfall is submerged at a depth of about 30 feet and isnever exposed. Sampling locations in the vicinity of the Chelan Avenue CSO outfall are shownin Figure 3-1.


Sediment samples were collected in 1995 and 1996 as part of the NPDES permit baselinesediment monitoring program. Samples were collected from six locations in 1995 for chemicalanalysis only. Sediment samples were collected for toxicity testing in 1996 from the 1995station locations where the concentration of one or more chemical constituents exceeded thesediment management standards chemical criteria for either the sediment quality standard (SQS)or cleanup screening level (CSL). Amphipod, echinoderm, and polychaete bioassays wereperformed on these samples. Subsequent chemical analysis was performed on archived sedimentfor samples that failed one or more bioassays.

A limited sediment study was performed for the Elliott Bay/Duwamish Restoration Program nearthe Chelan Avenue storm drain outfall which discharges stormwater from Harbor Island to theWest Waterway near the Chelan Avenue CSO outfall. The storm drain outfall is located on theeast bank of the waterway. Three samples were collected in 1995 at this location for chemicalanalysis only.

Effluent from the Chelan Avenue CSO regulator station was sampled in 1994 and 1995 as part ofNPDES permit baseline monitoring. The effluent was also sampled in 1996 and 1997 as part ofthe WQA project. Receiving water was sampled weekly for 26 weeks at six locations near theoutfall in 1996 and 1997 as part of the WQA project. These samples were analyzed for chemicaland bacteriological constituents. King County has also sampled the West Waterway at onelocation just upstream of the CSO outfall as part of their Stream Monitoring program.

Hydrodynamic data was collected near the CSO for a period of one year, from 1996 to 1997, aspart of the WQA project. Current data were collected with an acoustic doppler velocity profilerand conventional water quality data were collected with an array of three Hydrolab�Datasondes.

3.2 Other Sources of DataSeven sediment stations were sampled near the Chelan Avenue CSO in 1988 for the Elliott BayAction Program (Puget Sound Estuary Program, 1988). Nine sediment stations, located in theWest Waterway, were sampled in 1993 for the Harbor Island Superfund remedial investigation(Roy F. Weston, Inc., 1993).

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Table 3-1Inventory of King County DataChelan Avenue CSO

Sediment ChemistryStudy Year Ammonia AVS/SEM BNAs Butyltin Mercury Metals PCBs Pesticides PSD Solids Sulfides TOCNPDES CSO Baseline Sediment Study (6 grabs) 1995 6 1 6 0 6 6 6 6 6 6 6 6EB/DRP Chelan Storm Drain Sediment Study (3 grabs) 1995 0 0 3 3 3 3 3 3 3 3 0 3NPDES CSO Baseline Sediment Study (2 grabs) 1996 0 0 2 0 2 2 2 0 2 2 0 2

Sediment Bioassays Number of SamplesStudy Year Amphipod Echinoderm PolychaeteNPDES CSO Baseline Sediment Study (5 grabs) 1996 5 5 5

CSO Effluent Chemistry and Microbiology Number of SamplesStudy Year Ammonia BNAs Conductivity Demands Fec. Coliform Hardness Mercury Metals Microtox Nitrate/Nitrite PCBs Pesticides pH Solids TemperatureNPDES CSO Baseline Monitoring 1994-95 0 1 0 3 3 0 3 3 0 0 1 1 0 3 0CSO Water Quality Assessment 1996-97 22 22 23 22 22 23 23 23 22 12 1 1 23 38 23

Receiving Water Chemistry and MicrobiologyStudy Year Ammonia BNAs Conductivity Diss. Oxygen Fec. Coliform Mercury Metals Nitrate/Nitrite pH Solids TemperatureStream Monitoring Station 0305 1988-98 120 0 119 61 118 0 0 119 118 120 118CSO Water Quality Assessment 1996-97 192 42 234 120 192 121 234 22 192 192 240

Current MetersAn accoustic doppler velocity profiler (ADVP) current meter was deployed in the vicinity of the Chelan Avenue CSO for a period of 12 months from August, 1996 to August, 1997, in association with the CSO Water Quality Assessment.

Hydrolab® DatasondesThree Hydrolab® Datasondes were deployed in the vicinity of the Chelan Avenue CSO to collect salinity, temperature, turbidity, and depth data for a period of 12 months from August, 1996 to August, 1997, in association with the CSO Water Quality Assessment.


AVS/SEM - Acid Volatile Sulfides/Simultaneously Extractable MetalsBNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsPCBs - Polychlorinated BiphenylsPSD - Particle Size Distribution (Grain Size)TOC - Total Organic Carbon


Number of Samples

Number of Samples


10

4 Denny Way CSO

The Denny Way CSO regulator station is located at 3165 Alaskan Way. The outfall for this CSOdischarges into Elliott Bay along the northeastern shoreline in Myrtle Edwards Park. This outfallis exposed during normal low tides and frequently discharges directly across exposed intertidalsediment. Sampling locations in the vicinity of the Denny Way CSO outfall are shown in Fi gure4-1.

4.1 King County DataAn inventory of King County data collected near this CSO is provided in Table 4-1. Thisinventory does not include 30 pre-capping stations sampled in 1986.

Post-capping sediment monitoring has been conducted near the outfall in 1990, 1991, 1992,1994, and 1996. The sediment cap was placed in March, 1990. Samples collected from foursurface grab stations and three core stations on the cap plus a few off-cap surface grab stationshave been analyzed for chemical constituents regulated under the sediment managementstandards. In each of the monitoring years, benthic taxonomy surveys have also been conductedat two stations on the cap plus one station inshore of the cap. In 1996, two samples werecollected on the cap for toxicity testing by amphipod, echinoderm, and polychaete bioassays.

A pre-construction sediment characterization study was performed in 1997 under the DennyWay/Lake Union CSO Control Project to evaluate sediment quality prior to construction of thenew Denny Way CSO outfall. Surface grabs from 28 stations and cores from 13 stations werecollected and analyzed for chemical constituents.

CSO effluent samples were collected in 1992 and 1993 as part of the County’s NPDES permitbaseline monitoring requirement. Other effluent sampling efforts undertaken as part of thedesign of the new outfall include a vortex separator pilot project and a pre-constructionmonitoring program that evaluated bacteria, metals, and solids.

Receiving water near the Denny Way CSO outfall was sampled weekly for 26 weeks during theWQA project at two locations: just offshore of the outfall and directly over the sediment cap.These samples were analyzed for chemical and bacteriological constituents. Another locationnear the outfall has been sampled routinely for bacteria as part of the King County’s BeachMonitoring program.

Tissue samples were collected in the vicinity of the outfall in 1997 for the WQA project.Dungeness crab, English sole, quillback rockfish, Shiner perch, squid, and wild mussel tissuesamples were analyzed for organics and metals, as well as lipid content.

4.2 Other Sources of DataOne sediment station near the Denny Way CSO was sampled in 1988 for the Elliott Bay ActionProgram (Puget Sound Estuary Program, 1988).

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Table 4-1Inventory of King County DataDenny Way CSO

Sediment ChemistryStudy Year BNAs Mercury Metals PCBs Pesticides PSD Solids TOC VolatilesPost-Cap Sediment Monitoring (5 grabs/3 cores) 1990 21 21 21 21 21 21 21 21 6Post-Cap Sediment Monitoring (5 grabs/3 cores) 1991 21 21 21 21 21 21 21 21 6Post-Cap Sediment Monitoring (5 grabs/3 cores) 1992 21 21 21 21 21 21 21 21 6Post-Cap Sediment Monitoring (9 grabs/3 cores) 1994 23 23 23 23 23 23 23 23 18Post-Cap Sediment Monitoring (7 grabs) 1996 7 7 7 7 7 7 7 7 7Pre-Construction Sediment Study (28 grabs/13 cores) 1997 54 54 54 54 54 54 54 54 0

Sediment BioassaysStudy Year Amphipod Echinoderm PolychaetePost-Cap Sediment Monitoring (2 grabs) 1996 2 2 2

CSO Effluent Chemistry and MicrobiologyStudy Year BNAs Fec. Coliform Mercury Metals PCBs Pesticides Solids VolatilesNPDES CSO Baseline Monitoring 1992-93 13 13 12 24 12 11 13 7CSO Pre-Construction Effluent Monitoring Study 1996-97 0 30 17 29 0 0 68 0

Receiving Water Chemistry and MicrobiologyStudy Year Ammonia BNAs Conductivity Diss. Oxygen Fec. Coliform Mercury Metals Nitrate/Nitrite pH Solids TemperatureBeach Monitoring Station LTAB01 1988-98 0 0 0 0 125 0 0 0 0 0 125CSO Water Quality Assessment 1996-97 86 21 76 54 86 3 112 60 86 175 86

Tissue Chemistry Number of SamplesStudy Year BNAs Butyltin Mercury Metals PCBs Pesticides Lipids SolidsCSO Water Quality Assessment (total samples) 23 23 23 23 23 23 23 17 Dungeness Crab 1997 2 2 2 2 2 2 2 2 English Sole 1997 6 6 6 6 6 6 6 6 Quillback Rockfish 1997 3 3 3 3 3 3 3 3 Shiner Perch 1997 3 3 3 3 3 3 3 0 Squid 1997 6 6 6 6 6 6 6 6 Wild Mussels (wet season) 1997 3 3 3 3 3 3 3 0

Benthic SurveysBenthic taxonomy surveys have been completed for the post-cap monitoring program in 1990, 1991, 1992, 1994, and 1996. The surveys were performed on 5-station transects at each of three locations.

Specialized SamplingA vortex separator pilot study was completed at the Denny Way CSO in 1995.


BNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsPCBs - Polychlorinated BiphenylsPSD - Particle Size Distribution (Grain Size)TOC - Total Organic Carbon


Number of Samples

Number of Samples

Number of Samples


13

5 Duwamish Pump Station/Diagonal Avenue CSO/Storm Drain

The Duwamish Pump Station is located at 4501 East Marginal Way South, receiving flows fromboth the Elliott Bay Interceptor and the Duwamish Siphon. This location would only overflow inthe event of an extremely large flow or during a power outage. The outfall for the pump stationoverflow structure is co-located with the City of Seattle Diagonal Way CSO and storm drain(SD) outfall. The CSO/SD outfall is totally exposed at low tide and can discharge directly ontoexposed intertidal sediment. Sampling locations in the vicinity of the Duwamish Pump Stationand Diagonal Avenue CSO/SD outfalls are shown in Figure 5-1.

5.1 King County DataAn inventory of King County data collected near this CSO/SD is provided in Table 5-1.

As a result of a 1991 consent decree, this location became a remediation site under the ElliottBay/Duwamish Restoration Program. A limited number of sediment samples were collected forchemical analysis in 1992 and a large number of sediment samples were collected for chemicalanalysis and toxicity testing in 1994, 1995, and 1996. Toxicity testing was performed usingamphipod, echinoderm, and polychate bioassays. Chemical analysis was also performed onsediment samples collected in 1997 as part of a benthic survey for the WQA project. CSOeffluent and stormwater were sampled in 1995 at two sites in the drainage basin in conjunctionwith the sediment cleanup study at this site.

SPMD were deployed just offshore of the outfall to collect time-integrated samples for organicanalysis. This sampling effort was performed in conjunction with the WQA project.

Tissue samples were collected for chemical analysis from both transplanted and wild mussels forthe WQA project. Tissue samples were also collected offshore of the outfall during an ottertrawl performed by the Washington State Department of Fish and Wildlife and were analyzed fororganics and metals as well as lipid content. Species included Dungeness crab, English sole, andShiner perch. A benthic taxonomy survey was conducted on subtidal sediments at the DiagonalWay CSO/SD for the WQA project. This survey compared the benthic community at thislocation with a reference site across the river at Kellogg Island. An assessment was conducted ofthe nearshore and upland habitats in the immediate vicinity of the outfalls as part of theDuwamish/Diagonal sediment cleanup study

5.2 Other Sources of DataTwo sediment stations near the Duwamish/Diagonal CSO/SD were sampled in 1988 for theElliott Bay Action Program (Puget Sound Estuary Program, 1988). One sediment station wassampled in 1993 for the Harbor Island Superfund remedial investigation (Roy F. Weston, Inc.,1993). Eight sediment stations were sampled in 1997 for the NOAA Duwamish River sedimentstudy (National Oceanographic and Atmospheric Administration, 1997). Additional sedimentstations near the Duwamish/Diagonal CSO/SD will be sampled in 1998 as part of a large EPAinvestigation of the Duwamish River.

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Figure 5-1

Table 5-1Inventory of King County DataDuwamish/Diagonal CSO

Sediment ChemistryStudy Year AVS BNAs Butyltin Mercury Metals Methyl Hg PCBs Pesticides PSD Solids TOC VolatilesEB/DRP CSO Sediment Baseline Study (6 grabs) 1992 0 6 0 6 6 0 6 6 0 6 6 6EB/DRP Sediment Cleanup Study (35 grabs/2 cores) 1994 55 55 41 55 55 12 55 55 55 55 55 0EB/DRP Sediment Cleanup Study (14 grabs) 1995 14 14 14 14 14 0 14 0 14 14 14 0EB/DRP Sediment Cleanup Study (11 grabs/16 cores) 1996 0 42 0 42 42 0 42 0 42 42 42 0CSO Water Quality Assessment Benthic Study (18 grabs) 1997 0 18 18 18 18 0 18 0 18 18 18 0

Sediment BioassaysStudy Year Amphipod Echinoderm PolychaeteEB/DRP Sediment Cleanup Study (12 grabs) 1994 12 12 12EB/DRP Sediment Cleanup Study (7 grabs) 1996 7 7 7

CSO Effluent Chemistry and MicrobiologyStudy Year BNAs Conductivity Mercury Metals PCBs Pesticides pH Solids VolatilesEB/DRP Sediment Cleanup Study 1995 10 9 10 10 10 10 9 10 9

Tissue Chemistry Number of SamplesStudy Year BNAs Butyltin Lipids Mercury Metals PCBs Pesticides SolidsCSO Water Quality Assessment (Total Samples) 1996-97 33 33 33 33 33 33 12 11 Dungeness Crab 1997 2 2 2 2 2 2 0 2 English Sole 1997 6 6 6 6 6 6 0 6 Shiner Perch 1997 3 3 3 3 3 3 0 3 Transplanted Mussels (dry season) 1996 7 7 7 7 7 7 7 0 Transplanted Mussels (wet season) 1997 7 7 7 7 7 7 0 0 Wild Mussels (dry season) 1996 5 5 5 5 5 5 5 0 Wild Mussels (wet season) 1997 3 3 3 3 3 3 0 0

Benthic SurveysA benthic taxonomy survey was completed in September, 1996, for the CSO Water Quality Assessment on a 5-station transect near the Duwamish/Diagonal CSO outfall. A reference transect for this study was performed at the north end of Kellogg Island.

Specialized SamplingSemipermeable membrane devices (SPMD) were deployed at two depths near the Duwamish/Diagonal CSO outfalls in March/April, 1997, in association with the CSO Water Quality Assessment. The SPMD were analyzed for polynuclear aromatic hydrocarbon compounds, PCBs (Aroclors and congeners), and chlorinated pesticides.

Habitat AssessmentHabitat assessments of the area surrounding the Duwamish/Diagonal CSO outfalls were performed in October, 1995, and July, 1996, as part of the EB/DRP Sediment Cleanup Study.

NotesCSO - Combined Sewer OverflowAVS - Acid Volatile Sulfides

BNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsMethyl Hg - Methyl Mercury

PCBs - Polychlorinated BiphenylsPSD - Particle Size Distribution (Grain Size)TOC - Total Organic Carbon


Number of Samples

Number of Samples

Number of Samples


16

6 Hanford Street CSO

The Hanford Street CSO regulator and outfall stations are located at 2999 East Marginal WaySouth, within the trailer yard of the Port of Seattle Terminal 25. The outfall for this CSOdischarges into the East Waterway of the Duwamish River, underneath the container pier. Theoutfall is located in a rip-rapped wall on the east bank and is exposed during very low tides. Theoriginal outfall extended to the middle of the East Waterway but, in the late 1970’s, the outfallwas shortened to the current location on the east bank. Sampling locations in the vicinity of theHanford Street CSO outfall are shown in Figure 6-1.


Sediment samples were collected near the Hanford Street CSO in 1995 and 1996 as part of theNPDES permit baseline sediment monitoring. Samples collected in 1995 were analyzed forchemical parameters regulated under the sediment management standards. Sediment sampleswere collected for toxicity testing in 1996 from only the 1995 station locations where theconcentration of one or more chemical constituents exceeded either the SQS or CSL for toxicitytesting. Amphipod, echinoderm, and polychaete bioassays were performed on these samples.Subsequent chemical analysis was performed on archived sediment for samples that failed one ormore bioassays.

CSO effluent was sampled in 1996 and 1997 from the Hanford Street CSO regulator station aspart of the WQA project. The effluent samples were analyzed for chemical and bacteriologicalparameters as well as microtox bioassays.

Receiving water near this outfall was sampled weekly for 26 weeks during the WQA projectfrom six locations. These samples were analyzed for chemical and bacteriological constituents.

Tissue samples were collected from wild mussels near the CSO in 1996 and 1997 as part of theWQA project. The samples were analyzed for metals, organics, and lipid content.

6.2 Other Sources of DataSix sediment stations were sampled in the East Waterway near the Hanford Street CSO in 1988for the Elliott Bay Action Program (Puget Sound Estuary Program, 1988). Eleven sedimentstations were sampled in 1993 for the Harbor Island Superfund remedial investigation (Roy F.Weston, Inc., 1993). A large number of samples were also collected in 1997 during the Port ofSeattle Terminal sediment characterization study, however, sediment in this area will be dredgedin the near future (EVS Environmental Consultants, 1998).

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Table 6-1Inventory of King County DataHanford Street CSO

Sediment ChemistryStudy Year Ammonia AVS/SEM BNAs Mercury Metals PCBs Pesticides PSD Solids Sulfides TOCNPDES CSO Baseline Sediment Study (7 grabs) 1995 7 1 7 7 7 7 7 7 7 7 7NPDES CSO Baseline Sediment Study (3 grabs) 1996 0 0 3 3 3 3 0 3 3 0 3

Sediment Bioassays Number of SamplesStudy Year Amphipod Echinoderm PolychaeteNPDES CSO Baseline Sediment Study (6 grabs) 1996 6 6 6

CSO Effluent Chemistry and Microbiology Number of SamplesStudy Year Ammonia BNAs Conductivity Demands Fec. Coliform Hardness Mercury Metals Microtox Nitrate/Nitrite PCBs Pesticides pH Solids TemperatureCSO Water Quality Assessment 1996-97 24 24 35 29 20 24 57 63 99 13 6 6 35 62 39

Receiving Water Chemistry and MicrobiologyStudy Year Ammonia BNAs Conductivity Diss. Oxygen Fec. Coliform Mercury Metals Nitrate/Nitrite pH Solids TemperatureCSO Water Quality Assessment 1996-97 192 42 192 120 192 24 234 132 192 384 192

Tissue ChemistryStudy Year BNAs Butyltin Lipids Mercury Metals PCBs PesticidesCSO Water Quality Assessment (Total Samples) 1996-97 6 6 6 6 6 6 3 Wild Mussels (dry season) 1996 3 3 3 3 3 3 3 Wild Mussels (wet season) 1997 3 3 3 3 3 3 0


AVS/SEM - Acid Volatile Sulfides/Simultaneously Extractable MetalsBNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsPCBs - Polychlorinated BiphenylsPSD - Particle Size Distribution (Grain Size)TOC - Total Organic Carbon


Number of Samples

Number of Samples

Number of Samples


19

7 King Street CSO

The King Street regulator station is located at 499 Alaskan Way South. The outfall for this CSOdischarges into Elliott Bay at Pier 46. This outfall is located under the northeast edge of the pierand about half of the pipe is exposed at extreme low tides. Sampling locations in the vicinity ofthe King Street CSO outfall are shown in Figure 7-1.


Sediment data for the King Street CSO is limited to samples collected 10 years ago. Sedimentsamples were collected near the CSO outfall in 1988 as part of a sediment baseline study for theKing County’s NPDES permit. These samples were analyzed for chemical constituents.

CSO effluent samples were collected in 1996 and 1997 from the King Street CSO regulatorstation as part of the WQA project and were analyzed for chemical and bacteriologicalconstituents as well as microtox bioassays.

The only receiving water station near this CSO is sampled as part of the King County’s BeachMonitoring program. Samples collected from this location are analyzed for bacteria.

Tissue samples were also collected offshore of the outfall during an otter trawl performed by theWashington State Department of Fish and Wildlife and were analyzed for organics and metals aswell as lipid content. Species included Dungeness crab, English sole, and Shiner perch.

7.2 Other Sources of DataOne sediment station on the south side of Pier 48 was sampled in 1988 as part of the Elliott BayAction Program (Puget Sound Estuary Program, 1988).

heaofDetail

\ I

Seattle

Elliott Bay

•LEGEND

• of s"",, ..King County sediment sample • ,WQA tissue sample • ,King County water sample @ '"PSEP sediment sample • ,CSO effluent sample • "c~c 0

•• •. ~••""".,,,

.,,'~"

phillipj

Text Box

Figure 7-1

Table 7-1Inventory of King County DataKing Street CSO

Sediment ChemistryStudy Year BNAs Mercury Metals PCBs SolidsNPDES CSO Sediment Baseline Study (6 grabs) 1988 5 6 6 5 6

CSO Effluent Chemistry and Microbiology Number of SamplesStudy Year Ammonia BNAs Conductivity Demands Fec. Coliform Hardness Mercury Metals Microtox Nitrate/Nitrite PCBs Pesticides pH Solids TemperatureCSO Water Quality Assessment 1996-97 22 22 23 22 18 23 46 46 78 14 7 4 23 47 29

Receiving Water Chemistry and MicrobiologyStudy Year Fec. Coliform TemperatureBeach Monitoring Station LTEH02 1988-98 121 119

Tissue ChemistryStudy Year BNAs Butyltin Lipids Mercury Metals PCBs SolidsCSO Water Quality Assessment 1997 1 1 1 1 1 1 1


BNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsPCBs - Polychlorinated Biphenyls

Number of Samples

Number of Samples

Number of Samples


22

8 Lander Street CSO

The Lander Street CSO regulator station is located at Colorado Avenue South and South LanderStreet. The outfall station is located at 2701 East Marginal Way South. The outfall for this CSOdischarges into the East Waterway of the Duwamish River. The outfall is submerged and neverexposed. Sampling locations in the vicinity of the Lander Street CSO outfall are shown inFigure 8-1.


The data inventory for the Lander Street CSO is limited. Several effluent samples were collectedin 1988 as part of the Lander Street CSO pre-separation study. One effluent sample was alsocollected in 1988 as part of the NPDES permit baseline monitoring. Several effluent sampleshave been collected in 1997 and 1998 as part of a King County Industrial Waste storm drainagemonitoring program.

Tissue samples were collected from wild mussels near the CSO in 1996 and 1997 as part of theWQA project. The samples were analyzed for metals, organics, and lipid content.

8.2 Other Sources of DataThree sediment stations in the East Waterway near the Lander Street CSO were sampled in 1988for the Elliott Bay Action Program (Puget Sound Estuary Program, 1988). Six sediment stationswere sampled in 1993 for the Harbor Island Superfund remedial investigation (Roy F. Weston,Inc., 1993). A large number of samples were also collected in 1997 during the Port of SeattleTerminal sediment characterization study, however, sediment in this area will be dredged in thenear future (EVS Environmental Consultants, 1998). In 1995, the Port of Seattle performedmaintenance of the pier face and dredged sediment from around the outfall pipe.

Areao/Delail

•

•

• Lo.... ""...

•

LEGEND

... S.m.'..WQA. tissue sample • •CSO effluent sample • " •PSEP sed;ment sample • ,"0 '"

R...........,; ............,;0, ..

phillipj

Text Box

Figure 8-1

Table 8-1Inventory of King County DataLander Street CSO

CSO Effluent Chemistry and MicrobiologyStudy Year BNAs Conductivity Demands Fec. Coliform Hardness Mercury Metals PCBs Pesticides Solids Temperature VolatilesLander Pre-Separation CSO Study 1988 7 0 1 6 0 7 7 6 6 8 0 0NPDES CSO Baseline Monitoring 1988 1 0 1 1 0 1 1 1 1 1 0 1Industrial Waste Storm Drainage Monitoring 1997-98 3 3 0 0 3 3 3 3 3 0 3 3

Tissue ChemistryStudy Year BNAs Butyltin Lipids Mercury Metals PCBs PesticidesCSO Water Quality Assessment (Total Samples) 1996-97 6 6 6 6 6 6 3 Wild Mussels (dry season) 1996 3 3 3 3 3 3 3 Wild Mussels (wet season) 1997 3 3 3 3 3 3 0


BNAs - Base/Neutral/Acid Exctractable Semivolatile CompoundsPCBs - Polychlorinated Biphenyls


Number of Samples

Number of Samples


25

9 References

King County Department of Metropolitan Services Sediment Baseline Monitoring Plan Seattle,WA (1995)

King County Department of Natural Resources Duwamish/Diagonal Site Assessment ReportSeattle, WA (1997)

King County Department of Natural Resources The Denny Way Sediment Cap 1994 DataSeattle, WA (1996)

King County Department of Natural Resources The Denny Way Sediment Cap 1996 DataSeattle, WA (1998)

Municipality of Metropolitan Seattle Offsite Facilities and Miscellaneous Structures ManualVolume 2, West Division Seattle, WA (Revision B, 1993)

Striplin Environmental Associates Denny Way/Lake Union CSO Control Project ProposedMarine Outfall Sediment Characterization Prepared for King County Department of NaturalResources, Waste Treatment Division, Seattle, WA (1998)

Washington State Department of Ecology Sediment Management Standards, Chapter 173-204WAC Olympia, WA (1995)

Washington State Department of Ecology Sediment Management Standards ContaminatedSediment Site List Olympia, WA (1996)

10 Bibliography of Other Data Sources

EVS Environmental Consultants Port of Seattle Terminal 18 Sediment CharacterizationSampling and Analysis Results Prepared for the Port of Seattle, Seattle, WA (1998)

Hart Crowser Technical Memorandum Sediment Quality Assessment Seattle Ferry TerminalColeman Dock-South Area, Seattle, Washington Prepared for the Washington State Ferries,Washington State Department of Transportation, Olympia, WA (1994)

National Oceanographic and Atmospheric Administration Duwamish River Sediment StudySampling and Analysis Plan Prepared for the National Oceanographic and AtmosphericAdministration Damage Assessment Center, Seattle, WA (1997)

Puget Sound Estuary Program Elliott Bay Action Program: Analysis of Toxic Problem AreasPrepared for the United States Environmental Protection Agency, Region 10, Seattle, WA(1988)

Roy F. Weston, Inc. Remedial Investigation Report – Harbor Island, Part 2 – SedimentPrepared for the United States Environmental Protection Agency, Region 10, Seattle, WA(1993)

Washington State Department of Ecology Elliott Bay Waterfront Recontamination Study,Volume 1: Field Investigation and Volume 2: Data Evaluation and Remedial DesignRecommendations Report Prepared for the Elliott Bay/Duwamish Restoration Program Panel,Seattle, WA (1995)

Appendix ACSO Information and Structure Diagrams

I BRANDON STREET OUTFAll STATIONS241 E Marginal Way S, Seattle

/ I

/,I---f--_

~C'",,!

J

S Orcas 51

S Findla 81

Brandon Street ~iRegulator Station _~...; -1r---,S",Be"","""",,-tts""+__-+_~~~

~, ~

5i S Brandon 51 :1'k;\---r-+---"-""'''''''''-'''+----+-+~. '"If \-_+--+_--"S-"L"",,,,ile,,,S,,-,j-__+_+_+_---\

BrandonStreetOutfallStation

Terminal115

SMead 81

S Flda 51

DirectionsThe outfall station Is located northof S Brandon Street and off ofE Marginal Way S (west of theBrandon Street Regulator Station).The outfall station Is located at theend of an alley, next to theDuwamlsh River and south of theTllbury Cement Company.

J

Offsite Facilities and Miscellaneous Structures, Volume 2, West Division 1-27

Brandon Street Outfoll Station

!,,,

V

\!•

I••,•i,•,f

Elliott BayInterceptor(SeClion 2)

5 BrandonSt

Biela BayIl1ertepior(5eclion 3)

"H-ll

5 Da'NSOn 51

\-_-"-S9'=Sl.-j__+__.

"H~

5 Hudson St

"H~

MH·3

h,ct \",__-,S,-,L!!!OC""O!iSl"-",+_+__t-__,,,t-_+__t-__+ __.,Brandon Street ... ...

~ ~Regulator Station ;; r.;

"H-,__ - "

_------------1~S"R"id.'.'lJlO 51__.... . .. ___

"H-58

• Manhole

LEGEND

•••• Outfall

One-Une Drawing

1-28 Offsite Facilities and Miscellaneous Structures, Volume 2, West Division

,,........---..-.. .,.Duwamish .--.... •Watenvay~~~

~

Brandon StreetOutfall Station

Diverted flow

Brandon StreetRegulator Station

From EastMarginal WayPump Stalion

Brandon Street Outfall Station

To DuwamishPump Station

ElliotlBayInterceptor(Section 3)

Critical Information

Flow Schematic

System RelationshipThe Brandon Street Outfall Station Is partof the Elliott Bay Interceptor System. TheBrandon Street Regulator Station controlsflow from the Brandon Street Trunk Intothe Elliott Bay Interceptor. Excess flowgoes through the Brandon Street OutfallStation Into the Duwamish Waterway.

Flow/Construction InformationBrandon Street Regulator Station andBrandon Street Outfall Station areconsidered one system. See Brandon StreetRegulator Station for information.

Emergency Power:Invert Elevation

Outfall Gate:Overflow Location:

Standby Generator

101.93 feetDuwamish Waterway;through 84 feet ofsubmarine outfall

Offsite Facilities and Miscellaneous Structures, Volume 2, West Division , -29

CHELAN AVENUE REGULATOR STATION3455 Chelan Avenue SW, Seattle

SW Admiral Wa')-

99Chelan Ave~ueRegulator S~ation

WesrS8attJ.

"R9SSarCh .',': LaO-',:'" '" ..

Harbor AvenueRegulator Station

DirectionsFrom the West Seattle Freeway,heading west, take the WestMarginai Way Exit, and tum rightonto Chelan Avenue SW. Thestatlon is located northeast of theIntersection of Chelan Avenue SWand W Marginal Way.


;1[,.g~

'"<3~!<'"ag."

1

9<:~:

):1}.l

~

SW Spokano 51

WF'W:&tMHMinF~f.lJfifJAAV<,

LEGEND

• Manhole

..... Outfall/Overflow

- - - Local Storm Drain

- Local Side SewerNot to scale

EB6·1

E86·2

I EB6·3II J ,

• "·····JrSeattle Steel EBS'" I• EB8·' !• EB6·8 III ~.".!.~~~P."'''..~! l.................- ~i;idg~···I Ea!).,. Tl\Jnk

,

tructureW14-6/)g

Bypass InletS

_._--.• To Wes! h ;.:I·~"\,Duwamls:~ '.Walerway }l ",-~. ::~, "•••••~ ~!.~ •

• <~'"~ Speci.1 : ••••••: Manhole ~ I ".: WI....'., ".

: 'ill •••..& 'I"": I.'!:)oo ",• '" < '.: Chelan @ ::'": Avenue. >; ".

' -- ' .. , -J~i Station . • - - .~ .'1; •••• :~. • -it'll"""",'1""'1 ••••... • ". 602 ••'

..... 1 .;''MH 'i'O;.-?~

~ , -""""..,.. , W".'lB.. ' ..." " ·.~1 ••-=/ ...'. ': "~"':';:" ?;::':~Duw°namish

. ~. -'

e·6 E81-2 ,,, ~7~ • InterceptorI W"." _V , ~ ~I W14-604W 4-600 " • WI4.601I ~

-

West DuwamiSh--l'Interceptor

City 01 SeattleStann sewsr

One-Line Drawing

......-

~or~..~".Oi..::Ja.;:~.

'"ii>::J

'"oc~

V>

2~ffi~c~!"

~~

os:!o.o::J

Chelan Avenue Regulator Station

~

--- WestDuwumishWaterway

Chelan AvenueRegulator Station

West DlIWamishInterceptor

:rr ,.., West Duwamlsh::"--'J~,?I. ~ Waterway., ~

BypassOutlet

Structure

Harbor AvenueRegulator Station

Slide Gate City StormOraln

SlideGatesBypass Inlet

Structure

ToDuwami$hPump Stalion

Flow Schematic

System RelationshipThis stalion regulates flow from theDelrJdge Trunk, which serves the east sideof West Seattle, Jnto the West DuwamJshInterceptor. Wastewater flows directlythrough the stalion Jnto the Interceptor.

Standby Generator

100.13 feet99.56 feet

108.50 feetWest DuwamishWaterway; through a54-lnch-diameter outfalichannel to spedalmanhole WI4-118,75 feet north of thestation; then throughparaliel 48- and 30-lnchdiameter outfalis

Emergency Power:Invert Elevations

Regulator Gate:Outfali Gate:EmergencyOverflow Welr:

Outfall Location:


9.6

2llQll3.65.4

9.5

Flow Information (mgd)

.lll!ll3.65.4

Average Dry Weather:Average Wet Weather:Peak (not IncludingSeattle stormwaterInflow):


DENNY WAY REGULATOR STATION3165 Alaskan Way, Seattle

WMercetSl

zi

WDennyWay

z

~

j

Directions

The station Is located approximately150 yards north of the southernentrance to the Myrtle EdwardsPark.

To drive to the station, enter thePark's parking lot off of AlaskanWay, then unlock (with Met 1 key)the removable barriers at theentrance to the pedestrlan/blkepath before entering the park.

"


- 0,:J'" <1>00 ,C:J v~Thm'" • •<1> .moW ~ •

0M\I'11t 0 ;;:: r-aJ AM: c '" m:E. ;~M,: ~ :J Cl

:J 11~~: ~ ::r m10 0 Z-<1> 0

~fD~

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V>

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(§c:3<1>

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.'f.-,).~J~YB iii ;;;°vo'-~mo--

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~

~~

~'<

'"<t'lc:

~.....§g"

Denny Way Regulator Station

To lntefbayPump Station

.....

From OllWamishPump Station

Elliott BayInterceptor(Seclion 7)

EmergencyWeir #1(Elev 111.50)

......

...,..

lake Union Trunk

Local TrunkEqualizerGale

OutfallGales

..

Emergency Weir 13(Bev 100.00)

Denny WayRegulator Station

Emergency Weir 12 t(Elev 107.50)

~------J::;V

AapGate

~

Elliott Boy~~

~

Flow Schematic

System RelationshipThe statton Is a dual regulator statton thatprovides regulator and outfall gates, andemergency overflow weirs for the LakeUnion Trunk and a local trunk. Theregulator gates allow wastewater to flowInto the Elliott Bay Interceptor. Theoutfall gates may be opened to relieveexcess stormwater flow. Two emergencyoverflow weirs allow wastewater from thelocal and Lake Union trunks to bypass theoutfall gates Into the outfallllne.

111.50 feet

100.00 feetElliott Bay; through a96-inch outfall line tothe outfall structure atthe shoreline

107.50 feet

99.70 feet

Standby Generator

97.20 feet


Lake Union TrunkRegulator Gate:EmergencyOverflow Weir:Local TrunkRegulator Gate:EmergencyOverflow Weir:InterceotorEmergencyOverflow Weir:

Outfall Location:


12.0

LocalTrunk

1.21.4

Flow Information (mgd)Lake

UnionTrunk

5.56.5

1991

Average Dry Weather:Average Wet Weather:Peak (not IncludingSeattle stormwater inflow):


DUWAMISH PUMP STATION4501 E Marginal Way S, Seattle

'De/ridge1;"ayfield

sw GSrlesee 51

'" '"~ '"

~ ~ '" '" ~ !• •'"

> 0 "< " •~ i1i "

~

'" 0 •%.- • "!? ..

> N << •..~ "

~w

?i ~

DirectionsThe station Is located south of theWest Seattle Freeway on the cornerof Diagonal Avenue Sand E MarginalWayS.


Duwamish Pump Station

W1Q.5$

r

To InterbayPump Station

Elliott BayIntefc:eptot(section 4)

Eliott BayInterceptor(Seclion 3)

From East Marginal WayPump Station

~

-;.~...,

t- o••... •,+ "+

w

Tt~

.~

!~~llIII IJunaionNo.6 S\ruCI:lA'.

No.7

4f'....-+;..-it s on Ave

DischargeStructure

]:-+..,..

S Nevada 5, 4--------------_._---_.._._._-_.'-:-....,.~+~

+.+.,S Idaho 5t :-_.---_._.__._.__ _._._.__._._ _ __.._..-----_.._---_.._----,._-

DuwamishSiphonAftbay

~:SllNw:shInterceptor ~.: .~. J'. "'" Pum~ Station \ Wl4-101" ~I:

Overflow Wl.·10IM •Structure Duwamlsh

Pump Station //A"'-~-~SePtic/SIUdgeDump

2:~~':; ~;/..{compa~r~~~0«'

ti'''bCi,

One-Une Drawing

, -82 Offsite Facilities and Miscellaneous Structures, Volume 2, West Division

Duwamish Pump Station

DuwamishWaterway

DuwamlshPump

Station

From EastMarginal

Way PumpSlalion

DischargeStructure

To InterbayPump

Station

Ellion BayInterceptor(Secnon 3)

Flow Schematic

Overflow Cross ReferenceSee also Duwamish Siphon Aftbay andDuwamish Pump Station Overflow StructureIn SectIon 2.

System RelationshipThis station receives flow from the souththrough the Elliott Bay Interceptor andfrom the West Duwamish Interceptorthrough the Duwamish Siphon. Wastewater pumped through the stationcontinues through the Elliott BayInterceptor to the Interbay Pump Station.

59.5 62.5100.0 100.0

Average Dry Weather:Average Wet Weather:Peak (not IncludingSeattle stormwaterInflow):Firm Pumping Capadry:

2 hours99.00 feetDuwamlsh Waterway; atthe Duwamish SiphonAftbay through a 36Inch-diameter overflowline that Is 50 feet long

99.18 feet

WARNING

Storage times represent the time allowed fromshutdown to overflow under normal dryweather conditions. Storage times dependdirectly on weather conditions and condition ofthe pipes, and times must be adjustedaccordingly.

Critical InformationEmergency Power: None (generator

receptacle)

Storage Time:Overflow Elevation:Overflow Location:

Wet Wen GratingElevation:

2llllQ23.331.3


l.2&l22.430.3


HANFORD STREET REGULATOR STATION2999 E Marginal Way S, Seattle

LEGEND

w..@ Shipping Containers

..,..

.~.

..;..:i:

.,

West SeaItIe Fwy

DirectionsThe station is located on the westside of E Marginal Way, just northof S Hanford Street, and next to Portof Seattle, Terminal 2S sign.

Offsite Facilities and Miscellaneous Structures, Volume 2,. West Division 1-11 7

Hanford Street Regulator Station

.

•

LEGEND

Manhole

Storm Drain

Outfall/Overflow

____________~_§.!!!fYJ?t . ._. ..... _

••••••

-..

~ OCCidental AvenueInlerconneC1 Line

'" ~ '"~ ~ ~

" " "~ " ~• •:> •"~

Eftion BayInterceptor(Section 5)

Elliott BayInterceptor(Seaion 4)

~W1Q-146

..- '1' .,. " ~.,., ........., .•<.

W1Cl-308 , ,... -f" ., •.••W,3l?r! i ! !.....\r -r "!" TT /1G-147

, 118' .~~_.'_~.. ~~i~':~=:j:~-;~-~::::j~...;:;;~S~Han~""~~~-~~'=:..===_.:.:__:j; i ~ ! T '28' -------

'.,~-~,~~:r"'.~ 'ff'll ~. Hantord Street Trunk

~ i ! i I W1G-148

'l'n ~+· '..... ....- - .

·f·+·+ ·l·+~~..l.l..i~: . , ! .: ; : . ;.,. t ·,..t ;· . ! , •.;, .;- -<- .;_.;,, .

.•. . .• ... " A

.+. .+

3

Hanford StreetRegulator Station,

W1Cl-309

2A

2

,

: . : , ,To Intefbay : 1 j

Pump Station T1;-.:. ~ .,.....i ... ->:'~:: ,,-+~++-t 1'; .:..1..L.1. .L -1- I

.L ~. i ·j·"i +'" J1,1., "<. ·l··: ,,'....· . . .! ,

• <. ";.; r;"'~'~~~_ .... , .

Burl·R·ng:~!.' NdOTnh~n ~ .... .l.. .l.auroa ra......s! :;. S Walker 51

.,. ~ ~ "t ""','",+''1'"~.c;W,,,·clo:.'''-'-2+---'I---'I-----''-''=:''"-'''--------~j' -,. -f' .(. .;....'il~ji\.... ·r--r- 4( .,. ..... ~1 ! : 0. , ,

.... 'I~' -r , . 1! .. .... '," .... ~. ,~.o:!!,

:TT~l' S ,- !''-...t"j,<I'l ;! /-J-.,j,

->-""'-<"~"T "i ,1 'i.1.

~.....~~g~; ~;~~~n ::::: ~'~:~:~~r:~r~:~--'~. ..;. : =..j. ! Regulator Station

•••• ..,. Wl~.I~~A: L "•• , • 1 I

••• .~ ... <....: ... ; ....,

.. A ' I g(,. lIlT lander Street Storm Drain

w,~~ ~" ..~"~~,.;";;:~:I~:" --"~ - <-.;;~~=";;ao:d:.:r:S:'~·~·;;;·;;;·";;ao~·;;:~'~:~S~:;;";;~;;;~~~:~k~.~,/ / WIG-:»- ! t, I.. ~., Wl7-(I1AWlo-305 ..... +- + -+- + '" W1G-145

, I l ' ~, , '..!. -_··tWIQ-XMA .1.! 1 of

i ! ! 1tin

.y.•••..j. .,••••

j i ' l, , ( ,.. - -,-, ,... ... ·i· 4; i

..,Hanford StreetOutfall Station

~."'"".'., .

'"~

~

~...~

!1w

.... ... ....,.-<-7;tt i

NOIto acaIe

One-Une Drawing


Hanford Street Regufatar Station

•

To Interbay",m... Pump~ Station

Interceptor(Section 5)

Hanford StreetRegulator

Station

FromDuwamish

PumpStation

Hanford StreetOutfall Station

~

East .--~----'\iWaterway~~

~

Flow Schematic

Critical InformationSystem RelationshipThIs station regulates flow from theHanford Trunk into the Elliott BayInterceptor through 700 feet of 48-inchdJameter line. Excess stormwater overflows through the outfall station Into theEast Duwamish Waterway.


Regulator Gate:Overflow Location:

Standby Generator

99.50 feetDuwamlsh Waterway;through the HanfordStreet Outfall Station

20006.39.3

15.916.5


19806.59.5



HANFORD STREET OUTFAll STATION2999-1/2 E Marginal Way S, Seattle

•"w

:I:.:..~.-..-,.:..:..,..; ..-

West seattle Fwy

5

DirectionsThe station Is located within thetrailer yard of Port of Seattle,Terminal 25. From E MarginalWay S, turn into Terminal 25 (theHanford Street Regulator Station Ison your right-hand side), and drivepast the entrance to the trailer yard.Turn right on Lane B. The outfallstation is on your left-hand side.


Hanford Street Outfall Station

w

~~

"...~~w

lander Street Storm DrainS lander Sl- - ..

W1Q-XWA

Lander StreetRegulator Station

-<. .c;

~ Wlo-1.S

ERion BayInterceptor(section 5)

"Wl1-(1,ALander Street Trunk

~.~'.'. I

'..

~ Occidental AvenueInterconneetline

NOI 10 ICiIIll .. ~""""""':-:'·:<··_·W·'·WA@t:< ,-..,......,,,-:<,-»y.<-:-:<e<, <->« ~••,.;.:-:< "'<"':::::1;;;;;x."m -:<-••' .»>:«<0:-:'·-""-·-«.w


One-Une Drawing

2A

Elliott BayInterceptor(Section 4)

••••••

---

•

Manhole

Outfall/Overflow

Storm Drain

, -'24 Offsite Facilities and Miscellaneous Structures, Volume 2, West Division

Hanford Street Outfall Station

98.00 feetDuwamish EastWaterway; through a144- by 96-inchdiameter outfall gateinto a 48-inch-dlametersubmarine outfallI SO feet long

Outfall Station

F,~

OuwamishPump Station

~I

Flow Schematic

System RelationshipExcess stormwater overflows fromHanford Street Regulator Station throughthe stallon's outfall gate Into the EastDuwamish Waterway.

Flow/Construction InformationThe Hanford Street Regulator Stallon andHanford Street Outfall Stallon areconsidered one system. See Hanford StreetRegulator Station for informallon.

Hanford StreetRegulator Station

Critical InformationEmergency Power: Standby GeneratorInvert Elevation



KING STREET REGULATOR STATION499 Alaskan Way S, Seattle

DirectionsThe station is located on the westside of Alaskan Way S, Just north ofS King Street. Pier 46 is to the southof the station.

Offsite Facilities and Miscellaneous Structures, Volume 2, West Division , -'69

King Street Regulator Station

Eliott Bay rInterceptor (Seclion 6)2lldAvenueT.....

Kingdome

it.....................itit..................ititit......ii+ -!

Wlo-t34

Wl0·:WO WUH33

W1o.138

W1Q-29Il Wl().299

SAllantic SI

..,.t

1

i•j:••

W1G-297 :;::r.tt.. ~'~~~~S$~-i~lP'~~~~< ,n.±: 71' King Street Trunk. 71' ~~ 71' \41'

I+!t~~

t

King StreetRegulator Station

Pier 48

Outfall/Overflow

LEGEND

Connecticut StreetRegulator Station

• Manhole

EUlott Btl)'

To Elliott Bay Sor•••••••••••• ""'1(•••••• 0

.""'Il(•••••••••••••~ •••: ••••~•••

HollO scale

./


±± F.,.it 1:t....... t. t+ + ~.':"

One-Line Drawing


•King Street Regulator Station

To InterbayPump Station

Elliott &y~

~ ...........

From DvwamishPump Station

Eliott BayIntefceplDf(Sedion 5)

'. ~;,;....•.•.. <e\\1 .,:::

Flow Schematic

Standby Generator

108.02 feetElliott Bay; through a48-inch-dlameter outfallline that discharges 150feet offshore at a depthof 20 feet

104.50 feet103.95 feet


Regulator Gate:Outfall Gate:EmergencyOverflow Weir:

Overflow Location:


4.65.7

System RelationshipThis station regulates flow from thewaterfront area between Klng andColumbia streets through 734 feet of42-lnch-dlameter line Into the Elliott BayInterceptor.

Flow Information (mgd).l.2.8ll .2llQQ

2.1 1.92.2 2.0


Offsite Facilities and Miscellaneous Structures, Volume 2, West Division , -'71

LANDER STREET REGULATOR STATIONColorado Avenue Sand S Lander Street, Seattle

,..t,~-

;.,.~-

i"

-:-,.,•.•.~-.•..,.:i:

.-.•.

West SeaJtle Fwy

DirectionsFrom 1st Avenue S, tum onto SLander Street heading west. Thestation Is located at the end of thestreet, on the left-hand side andnext to the railroad tracks. Next tothe station Is the Sears and SODOBuilding.


Lander Street Regulator Station

Occidental Avenue':i Interconnect line

,. ''}:%MI1HWJdML

LEGEND

Storm Drain

Manhole

Outfall/Overflow

•

Not toscaJe

,::1"<,,;I•

, , : . :To Interbay

Pump Station"i' ; -:. t t1+-f~-+

2A3

lander Street

~"" OUtfa~1IStation

'.~.'.'.'.".

~ ....W1Q--306

~...~'-.. 2" .


'"~

~

Ii..<...~w

One-line Drawing

, -192 Offsite Facilities and Miscellaneous Structures, Volume 2, West Division

Lander Street Regulator Station

lander StreetOutfall Station

To InterbayPump Stabon

Flow Schematic

Flow Information

Critical InformationStandby Generator

Average Dry Weather:Average Wet Weather:Peak:

Current_ mgd/99.05 feet_ mgd/lOI.20 feet_ mgd/I07.00 feet

98.50 feet108.00 feetDuwamish EastWaterway; through the90-lnch-dlameter LanderStreet Stann Drain tothe Lander Street OutfallStation and out througha 96-lnch-diameteroutfall line


Regulator Gate:Overflow Weir:

Overflow Location:

System RelationshipThe Lander Street Regulator Station worksIn conjunction with the Hanford StreetRegulator Station to regulate the flow ofwastewater and stannwater from theLander and Rainier Valley Basins Into theElllott Bay Interceptor (EBI). The LanderStreet Regulator Station collects flowsfrom the Lander Street Trunk and, whenstann flows are low, from the LanderStreet Stann Drain, which parallels thetrunk. As flows Increase, the station sendsstonnwater to the Duwamlsh EastWaterway via the stann drain and outfall,and restricts wastewater flow to the EBI bystoring It In upstream lines. When thestorage capadty Is exceeded, the excesswastewater Is diverted to the storm drainand a combined sewer overflow occurs.


LANDER STREET OUTFALL STATION2701 East Marginal Way S, Seattle

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DirectionsThis statlon Is located on the westside of East Marginal Way 5 andapproximately five blocks north ofthe West Seattle Freeway.

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Lander Street Outfall Station

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Storm Drain

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Flow Schematic

System RelationshipThis station discharges flows from theLander Street Storm Drain to theDuwamish East Waterway via an 96-inchdiameter outfall line.

See Lander Street Regulator Station for moreinformation.

NOTEThis station is the old Lander Street RegulatorStation. It used to regulate flow from theLander Street Trunk into the Elliott Bay Interceptor. Although the station is equipped witha regulator, bypass and outfall gate, only theoutfall gate is used.

Flow Information

See Lander Street Regulator Station forinformation.



Standby Generator

99.92 feetDuwamish EastWaterway; through a96-inch-diameter outfallline that dischargesISO feet offshore at adepth of 20 feet


cso sampling and monitoring data inventory€¦ · 04/08/1998 · mercury phenanthrene...

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