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King County Department of Natural Resources and Parks

E33013E ENGINEERING SERVICES FOR WATER REUSE WORK PROGRAM

QUARTERMASTER HARBOR COMMUNITIESWASTEWATER MANAGEMENT OPTIONS

FINAL

November 2008

November 2008 iH:\Final\KingCo-DNR_SEA\6881E00\Task 6 Project Report\Final\COVTOC.doc

King County Department of Natural Resources and Parks

QUARTERMASTER HARBOR COMMUNITIESWASTEWATER MANAGEMENT OPTIONS

E33013E ENGINEERING SERVICES FOR WATER REUSE WORK PROGRAM

TABLE OF CONTENTS

Page No.

EXECUTIVE SUMMARY .................................................................................................ES-1ES.1 Introduction ..........................................................................................................ES-1ES.2 Study Area ...........................................................................................................ES-1ES.3 System Management ...........................................................................................ES-3ES.4 Treatment and Discharge Options .......................................................................ES-5

ES.4.1 Centralized Treatment and Discharge Option ..........................................ES-5ES.4.2 Decentralized Treatment and Discharge Option ......................................ES-7ES.4.3 Holding Tanks ..........................................................................................ES-9

ES.5 Cost Estimate Summary and Life Cycle Analysis ..............................................ES-10ES.6 Study Conclusions and Recommended Next Steps...........................................ES-10

ES.6.1 Conclusions............................................................................................ES-10ES.6.2 Next Steps..............................................................................................ES-11

CHAPTER 1 STUDY AREA .............................................................................................. 1-11.1 Area Description..................................................................................................... 1-11.2 Parcels and Population .......................................................................................... 1-3

1.2.1 Parcel Quantity........................................................................................... 1-31.2.2 Population per Parcel ................................................................................. 1-3

1.3 Wastewater Flow.................................................................................................... 1-61.3.1 Water Usage .............................................................................................. 1-61.3.2 Wastewater Flow........................................................................................ 1-61.3.3 Water Conservation.................................................................................... 1-7

1.4 Summary................................................................................................................ 1-8

CHAPTER 2 SYSTEM MANAGEMENT............................................................................ 2-12.1 Governing Policy .................................................................................................... 2-12.2 Public Agency Requirement................................................................................... 2-1

2.2.1 Annexation ................................................................................................. 2-22.2.2 Boundary Review Board for King County ................................................... 2-2

2.3 Planning and Engineering ...................................................................................... 2-22.3.1 Sewer Comprehensive Plan Update .......................................................... 2-22.3.2 Engineering Report/Facility Plan ................................................................ 2-3

2.4 Project Financing and Funding .............................................................................. 2-32.5 Financing Sources ................................................................................................. 2-4

2.5.1 Low-Interest Loans..................................................................................... 2-52.5.2 Bond Financing .......................................................................................... 2-5

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2.6 Funding Sources - Grants ...................................................................................... 2-72.7 Summary................................................................................................................ 2-8

CHAPTER 3 CENTRALIZED TREATMENT OPTION ...................................................... 3-13.1 Existing Centralized System .................................................................................. 3-1

3.1.1 Vashon Sewer District Collection System .................................................. 3-13.1.2 Vashon Island WWTP ................................................................................ 3-3

3.2 Design Guidelines and Assumptions ..................................................................... 3-33.2.1 Criteria for Sewage Works Design ............................................................. 3-33.2.2 Sewage Collection in the Study Area ......................................................... 3-43.2.3 Conveyance System in the Study Area ...................................................... 3-43.2.4 Facilities Location....................................................................................... 3-4

3.3 Collection System Options ..................................................................................... 3-43.3.1 Conventional Gravity Collection System .................................................... 3-53.3.2 Septic Tank Effluent Pumping/Septic Tank Effluent Gravity (STEP/STEG)

Collection System....................................................................................... 3-63.3.3 Vacuum Sewer Collection System ............................................................. 3-73.3.4 Low-Pressure Collection System................................................................ 3-73.3.5 Combined Gravity, Vacuum, and Low Pressure Collection System........... 3-83.3.6 Summary of Collection System Options ..................................................... 3-8

3.4 Conceptual System .............................................................................................. 3-103.5 Cost Estimate....................................................................................................... 3-10

3.5.1 Capital Costs ............................................................................................ 3-113.5.2 O&M Cost ................................................................................................. 3-12

3.6 Summary.............................................................................................................. 3-12

CHAPTER 4 DECENTRALIZED TREATMENT AND DISCHARGE OPTIONS................ 4-14.1 Decentralized Systems Regulations ...................................................................... 4-14.2 Disposal Options .................................................................................................... 4-1

4.2.1 Surface Water Disposal.............................................................................. 4-34.2.2 Land Discharge .......................................................................................... 4-44.2.3 Land Treatment .......................................................................................... 4-64.2.4 Drainfield .................................................................................................... 4-64.2.5 Subsurface Drip System (SDS) ................................................................ 4-114.2.6 Reclaimed Water Use - Ground Water Recharge .................................... 4-114.2.7 Reclaimed Water Use - Irrigation ............................................................. 4-114.2.8 Land Discharge Summary........................................................................ 4-12

4.3 Treatment Options ............................................................................................... 4-124.3.1 Septic System .......................................................................................... 4-124.3.2 Sand Filters .............................................................................................. 4-144.3.3 Recirculating Gravel Filter System ........................................................... 4-144.3.4 Mound System.......................................................................................... 4-194.3.5 Aerobic Treatment Unit ............................................................................ 4-194.3.6 Sequencing Batch Reactor....................................................................... 4-194.3.7 Membrane Bioreactor ............................................................................... 4-234.3.8 Living Machine ......................................................................................... 4-234.3.9 Treatment System Summary.................................................................... 4-25

4.4 Existing Community Systems............................................................................... 4-254.4.1 Vashon Island - Beulah Park/Cove .......................................................... 4-254.4.2 Jefferson County ...................................................................................... 4-25

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4.4.3 Whidbey Island - Holmes Harbor.............................................................. 4-274.5 Options Summary ................................................................................................ 4-274.6 Decentralized Treatment/Discharge Siting........................................................... 4-274.7 Decentralized Treatment and Discharge Schematic Development...................... 4-28

4.7.1 System Capacity....................................................................................... 4-314.7.2 Individual Septic Systems and Community Drainfield .............................. 4-31

4.7.2.1 Design Guidelines ...................................................................... 4-324.7.2.2 Size, Land Requirement............................................................. 4-334.7.2.3 Conveyance ............................................................................... 4-33

4.7.3 Community Recirculating Gravel Filter with SDS Discharge .................... 4-334.7.3.1 Design Guidelines ...................................................................... 4-354.7.3.2 Size, Land Requirement............................................................. 4-364.7.3.3 Conveyance ............................................................................... 4-36

4.7.4 Community SBR and Sand Filter with Percolation Pond Discharge......... 4-364.7.4.1 Design Guidelines ...................................................................... 4-384.7.4.2 Size, Land Requirement............................................................. 4-394.7.4.3 Conveyance ............................................................................... 4-39

4.7.5 Community MBR with Percolation Pond Discharge ................................. 4-394.7.5.1 Design Basis .............................................................................. 4-414.7.5.2 Size, Land Requirement............................................................. 4-414.7.5.3 Conveyance ............................................................................... 4-42

4.8 Cost Estimate....................................................................................................... 4-424.8.1 Capital Cost.............................................................................................. 4-424.8.2 O&M Cost ................................................................................................. 4-424.8.3 Cost Summary.......................................................................................... 4-44

4.9 Summary.............................................................................................................. 4-44

CHAPTER 5 HOLDING TANK OPTION ........................................................................... 5-15.1 Governing Regulations........................................................................................... 5-15.2 Definition ................................................................................................................ 5-15.3 Conditions of Use................................................................................................... 5-15.4 Permit Submittals ................................................................................................... 5-25.5 Design Guidelines .................................................................................................. 5-2

5.5.1 Tank Sizing................................................................................................. 5-25.5.2 Pumping Frequency ................................................................................... 5-35.5.3 Tank Location............................................................................................. 5-35.5.4 Tanks / Tank Materials ............................................................................... 5-35.5.5 Liquid Level / Alarm System....................................................................... 5-3

5.6 Holding Tank Configurations.................................................................................. 5-35.6.1 Vashon Island Criteria and Assumptions ................................................... 5-55.6.2 Single-Family Service................................................................................. 5-55.6.3 Multi-Family Service ................................................................................... 5-65.6.4 Seasonal vs. Full Time Use........................................................................ 5-6

5.7 Conveyance Systems ............................................................................................ 5-85.7.1 Gravity Systems ......................................................................................... 5-85.7.2 Grinder Pumps ........................................................................................... 5-8

5.8 Operation and Maintenance Requirements ........................................................... 5-85.9 Cost........................................................................................................................ 5-9

5.9.1 Capital Cost................................................................................................ 5-95.9.2 Recurring Costs........................................................................................ 5-10

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5.10 Summary.............................................................................................................. 5-11

CHAPTER 6 COST ANALYSIS......................................................................................... 6-16.1 Basis of Cost .......................................................................................................... 6-16.2 Cost Summary ....................................................................................................... 6-26.3 Life Cycle Analysis ................................................................................................. 6-2

APPENDIX A FINANCING AND FUNDING WEBSITES APPENDIX B DETAILED COST DATA APPENDIX C CALCULATIONS APPENDIX D PRODUCT DATA APPENDIX E RECLAIMED WATER EFFLUENT QUALITY APPENDIX F MARINE RECOVERY AREA

LIST OF TABLES

Table ES.1 Wastewater Design Flows........................................................................ES-4Table ES.2 Centralized Treatment Options Capital and Annual O&M Cost Summary ..................................................................................................ES-7Table ES.3 Decentralized Treatment Options Capital and Annual O&M Cost Summary ..................................................................................................ES-9Table ES.4 Holding Tank Option Capital and Annual O&M Cost Summary .............ES-10Table ES.5 Wastewater Management Options Cost Summary/Life Cycle Cost Analysis ..................................................................................................ES-12

Table 1.1 Burton Water Use per Resident Unit .......................................................... 1-6Table 1.2 Wastewater Design Flows.......................................................................... 1-7

Table 3.1 Vashon Wastewater Treatment Plant Design Flow.................................... 3-3Table 3.2 Collection System Options ......................................................................... 3-9Table 3.3 Centralized Treatment Option Capital Cost.............................................. 3-12Table 3.4 Centralized Treatment Option Annual O&M Cost (2012) ......................... 3-12

Table 4.1 Decentralized Treatment Systems Regulatory Requirements.................... 4-2Table 4.2 Soil Dispersal Component Loading Rate(8)................................................. 4-8Table 4.3 Treatment Requirements and Horizontal/Vertical Separation (1,2)............... 4-9Table 4.4 Design Flow.............................................................................................. 4-32Table 4.5 Decentralized Treatment Options Capital and Annual O&M Cost Summary .................................................................................................. 4-45

Table 5.1 Holding Tank Configurations ...................................................................... 5-6Table 5.2 Single-Family Holding Tank Capital Costs ............................................... 5-10Table 5.3 Multi-Family (8-Household) Holding Tank Capital Costs.......................... 5-10Table 5.4 Single-Family Holding Tank Recurring Costs........................................... 5-11Table 5.5 Multi-Family (8-Household) Holding Tank Recurring Costs ..................... 5-11Table 6.1 Wastewater Management Options Cost Summary/Life Cycle Cost Analysis ...................................................................................................... 6-4

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LIST OF FIGURES

Figure ES.2 Centralized Treatment Option Conceptual Conveyance System .............ES-6

Figure 1.1 Study Area.................................................................................................. 1-2Figure 1.2 Environmental Areas .................................................................................. 1-4Figure 1.3 Land Use .................................................................................................... 1-5

Figure 3.1 Centralized Treatment Option Conceptual Conveyance System ............... 3-2

Figure 4.1 Conventional Trench Detail ........................................................................ 4-7Figure 4.2 Drainfield Area Requirements .................................................................. 4-10Figure 4.3 Typical Septic System Schematic ............................................................ 4-13Figure 4.4 Intermittent Sand Filter ............................................................................. 4-15Figure 4.5 Sand Lined Trench ................................................................................... 4-16Figure 4.6 Stratified Sand Filter ................................................................................. 4-17Figure 4.7 Recirculating Gravel Filter ........................................................................ 4-18Figure 4.8 Mound System.......................................................................................... 4-20Figure 4.9 Aerobic Treatment Unit ............................................................................ 4-21Figure 4.10 Sequencing Batch Reactor (SBR)............................................................ 4-22Figure 4.11 Membrane Bioreactor ............................................................................... 4-24Figure 4.12 The Living Machine .................................................................................. 4-26Figure 4.13 Potential Decentralized Treatment/Discharge Sites................................. 4-29Figure 4.14 Potential Sites, Soil Survey, and Water Wells .......................................... 4-30Figure 4.15 Community Conventional Drainfield ......................................................... 4-34Figure 4.16 Recirculating Gravel Filter and Subsurface Drip System ......................... 4-37Figure 4.17 Sequencing Batch Reactor (SBR) and Percolation Pond......................... 4-40Figure 4.18 Membrane Bioreactor (MBR) and Percolation Pond ................................ 4-43

Figure 5.1 Single Residence Holding Tank Configuration and Selected Setback Requirements ............................................................................................. 5-4

Figure 5.2 Multi-Family Holding Tank Configuration.................................................... 5-7

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LIST OF ACRONYMS

AAF average annual flow

ADF average day flow

AKART All know available and reasonable methods prevention, control, and treatment

ATU aerobic treatment unit

BOD biochemical oxygen demand

CAA Comprehensive Alternatives Analysis

CBOD carbonaceous biochemical oxygen demand

CTED Washington Department of Community, Trade, and Economic Development

DDES King County Department of Development and Environmental Services

DOH Washington State Department of Health

Ecology Washington State Department of Ecology

EH King County Environmental Health

ENR CCI Engineering News Record Construction Cost Index

EPA Environmental Protection Agency

ERU equivalent residential unit

fps feet per second

FTE full-time equivalent

GMA Growth Management Act

GO General Obligation

gpd gallons per day

gpd/sf gallons per day per square feet

gpcd gallon per capita per day

HHA health hazard area

HTSS Holding Tank Sewer System

HUD United States Department of Housing and Urban Development

I/I Inflow and Infiltration

in/hr inches per hour

KC BOH King County Board of Health

KC WTD King County Wastewater Treatment Division

kW-hr kilowatt hour

LID Local Improvement District

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LOSS large on-site sewage system

LPS low-pressure collection system

LUD local utility district

MBR membrane bioreactor

mgd million gallons per day

mg/L milligram per liter

mL/g milliliters per gram

MRA Marine Recovery Area

NEPA National Environmental Policy Act

NHPA National Historic Preservation Act

NOAA National Oceanic and Atmospheric Administration

NOV normal operating volume

NPDES National Pollution and Discharge Elimination System

OMB Office of Management and Budget

O&M Operation and Maintenance

OSM on-site system maintainer

OSS on-site sewage system

Orange Book The Criteria for Sewage Works Design

PHF peak hour flow

psi pounds per square inch

PUD Public Utility District

PVC poly-vinyl chloride

RCW Revised Code of Washington

ROW right-of-way

RSV reserve storage volume

SBR sequencing batch reactor

SDS subsurface drip system

SEPA State Environmental Policy Act

sf square feet

SRF State Water Pollution Control Revolving Fund

SRT solids retention time

SSAS sub-surface soil absorption system

STEG septic tank effluent gravity

STEP septic tank effluent pumping

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SVI sludge volume index

TSS total suspended solids

ULID Utility Local Improvement District

UPC Uniform Plumbing Code

URL Uniform Resource Locator

USDA United States Department of Agriculture

USFWS US Fish and Wildlife Service

UTRC King County Utilities Technical Review Committee

UV ultraviolet

VSD Vashon Sewer District

WAC Washington State Administrative Code

WA DAHP Washington State Department of Archeology and Historic Preservation

WA DNR Washington State Department of Natural Resources

WWTP Wastewater Treatment Plant

APPENDIX A FINANCING AND FUNDING WEBSITES

State Water Pollution Control Revolving Fund (SRF) Loan Program http://www.ecy.wa.gov/programs/wq/funding/indexfunding.html

Centennial Clean Water Grant and Loan Program http://www.ecy.wa.gov/programs/wq/funding/indexfunding.html

Public Works Trust Fund Loan Program http://www.pwb.wa.gov/FORMS.HTM.

USDA Rural Development Revolving Fund Program http://www.usda.gov/rus/water/index.htm

Reclaimed Water Grants Program http://www.ecy.wa.gov/programs/wq/funding/reclaimedwater/ReclaimedWaterGrants.htm

Community Development Block Grant Program http://www.cted.wa.gov/site/314/default.aspx.

APPENDIX B DETAILED COST DATA

TABLE B1

DETAILED COST ESTIMATE

PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 2/26/2008LOCATION VASHON ISLAND, WA BY : ARCELEMENT : CENTRALIZED TREATMENT OPTION REVIEWED BY: AMP

SPEC. NO. DESCRIPTION QUAN UNIT UNIT COST SUBTOTAL TOTAL

6" DIP Force Main & Sitework 25,000 LF $85 $2,135,750.00 $2,135,750Abadon Existing Septic Tanks in place 433 EA $600 $259,800.00 $259,8006" Gravity Side Sewer 13,000 LF $37 $481,000.00 $481,0006" Vacuum Manifold (On Beach) 8,000 LF $50 $397,432.52 $397,4336" Vacuum Manifold (In-Street) 9,000 LF $103 $924,433.42 $924,4333" Vacuum Manifold Lateral (On Beach) 5,000 LF $28 $140,981.13 $140,9813" Vacuum Manifold Lateral (In-Street) 5,800 LF $16 $95,397.23 $95,397Vacuum Interface Valve/Buffer Chamber (On Beach) 100 EA $5,099 $509,881.76 $509,882Vacuum Interface Valve/Buffer Chamber (In-Street) 117 EA $5,653 $661,362.63 $661,363Vacuum Station 2 EA $593,128 $1,186,255.52 $1,186,256Pump Station (200 ft. Dynamic Head) 4 EA $86,110 $344,441.52 $344,442Pump Station (70 ft. Dynamic Head) 1 EA $64,583 $64,582.78 $64,583Asphalt Concret Pavement Restoration 14,800 SY $25 $372,664.00 $372,664Beach Restoration 28,900 SY $21 $601,409.00 $601,409

DIRECT COST $8,175,392

CONTINGENCY 0% $0SUBTOTAL $8,175,392

MOB/DEMOB (5%), GENERAL CONDITIONS (10%), OH&P (10%) 27% $2,207,356

TOTAL ESTIMATED CONSTRUCTION COST (LOW ESTIMATE) $10,382,747

CONTINGENCY 100% $8,175,392SUBTOTAL $16,350,783


TOTAL ESTIMATED CONSTRUCTION COST (HIGH ESTIMATE) $20,765,494

MBR, UV and screening costs based on a preliminary estimate from Zenon. The UV costs were marked up by a factor of 100% for piping, 30% for electrical and 20% for instrumentation and control. The screening costs were marked up by a factor of 50% for piping, 30% for electrical and 20% for instrumentation and control. The costs for the remaining elements: influent pumping, grit removal, solids storage and site facilities were based on cost models

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Table B2 Centralized Treatment Option Annual O&M Cost (2012) Quartermaster Harbor Communities Wastewater Management Options King County Department of Natural Resources and Parks

Component Total Cost Pump Station Electrical $5,300Magnolia Beach Vacuum Station Electrical $3,600Quartermaster Harbor Vacuum Station Electrical $4,200Equipment maintenance (2% of equipment capital cost) $30,000Labor (1.9 FTE)(1) $205,300KC Capacity Charge and Sewer Rate at $51.94 $472,000

Total Annual Operating Costs $720,400Notes:(1) 0.5 FTE pump stations, 1.4 FTE vacuum system.

TABLE B3DETAILED COST ESTIMATE

PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 6/4/2008LOCATION VASHON ISLAND, WA BY : AMPELEMENT : DECENTRALIZED OPTION - SEPTIC TANK/COMMUNITY DRAINFIELD REVIEWED BY: ALS


Land Acquisition 56 AC $24,000 $1,344,000.00 $1,344,000Septic Tanks for 25% parcels 108 EA $3,061 $331,374.90 $331,375Site Work - Clear and Grub 56 AC $391 $21,896.00 $21,896Site Work - Grading 731,808 SF $1 $1,009,895.04 $1,009,895Site Work - Fence (pump chamber) 3,220 LF $46 $146,510.00 $146,510Site Work - Gravel Road 21,000 SF $6 $115,500.00 $115,500Site Work - Electrical 14 EA $3,000 $42,000.00 $42,000Drainfield Excavation 39,200 CY $10 $392,000.00 $392,000Haul Excavated Materials 43,120 CY $20 $862,400.00 $862,4006" Perforated PVC 92,400 LF $14 $1,312,680.60 $1,312,681Monitoring Stations 784 EA $70 $54,880.00 $54,880Gravel Backfill 39,200 CY $66 $2,568,384.00 $2,568,384Pressure Distribution System (Pump, Tank, Controls) 14 LS $45,000 $630,000.00 $630,000STEP system lateral (1.5") 11,700 LF $18 $206,037.00 $206,037STEP system pump 234 EA $2,000 $468,000.00 $468,0006" Gravity Side Sewer 6,500 LF $37 $240,500.00 $240,5006" Vacuum Manifold (On Beach) 8,000 LF $50 $397,432.52 $397,433Vacuum Interface Valve/Buffer Chamber (On Beach) 100 EA $5,099 $509,881.76 $509,882Beach Restoration 28,900 SY $21 $601,409.00 $601,409Vacuum Station 1 EA $593,128 $593,127.76 $593,1286" Force main to drainfield site 10,560 LF $85 $902,140.80 $902,141Conveyance Pump Stations 2 EA $86,110 $172,220.76 $172,221









Table B4 Individual Septic Systems and Community Drainfield O&M Cost (2012) Quartermaster Harbor Communities Wastewater Management Options King County Department of Natural Resources and Parks

Component Total Cost Septic Tank Maintenance $34,700Drainfield Pressure Distribution (5 HP pump each site) $850Magnolia Beach Vacuum Station Electrical(3) $3,600Greater Burton STEP system Electrical $300200 ft Capacity Pump Stations Electrical (2 stations) $2,500Equipment maintenance (2% of equipment capital cost) $25,000Drainfield maintenance (1% of drainfield capital cost) $1,700Labor (2.3 FTE $51.94/hr)(2) $248,500

Total Annual Operating Costs $317,150Notes:1. Assumes pumping once every five years at each of 433 parcels.2. Assumes 0.1 FTE drainfield, 0.2 FTE pump stations, 1.0 FTE STEP systems, 1.0 FTE vacuum/gravity system. 3 Based on Carnations 2004 Facilities Plan


PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 6/4/2008LOCATION VASHON ISLAND, WA BY : AMPELEMENT : DECENTRALIZED OPTION - RECIRC GRAVEL FILTER/SUBSURFACE DRIP REVIEWED BY: ALS


Abandon Existing Septic Tanks in place (75% of homes have tanks) 325 EA $600 $194,850.00 $194,850Land Acquisition 20 AC $24,000 $475,200.00 $475,200Site Work - Clear and Grub 20 AC $391 $7,741.80 $7,742Site Work - Grading 287,628 SF $1 $396,926.64 $396,927Site Work - Fence 6,160 LF $46 $280,280.00 $280,280Site Work - Gravel Road 27,500 SF $6 $151,250.00 $151,250Site Work - Electrical 11 EA $3,000 $33,000.00 $33,000Treatment Plant (Septic Tanks, Filters, UV) 11 EA $914,000 $10,054,000.00 $10,054,000Effluent Disposal Drip Irrigation Facility 11 LS $70,500 $775,500.00 $775,500Monitoring Stations 66 EA $725 $47,850.00 $47,8506" Gravity Side Sewer 13,000 LF $37 $481,000.00 $481,0006" Vacuum Manifold (On Beach) 8,000 LF $50 $397,432.52 $397,4336" Vacuum Manifold (In-Street) 9,000 LF $103 $924,433.42 $924,4333" Vacuum Manifold Lateral (On Beach) 5,000 LF $28 $140,981.13 $140,9813" Vacuum Manifold Lateral (In-Street) 5,800 LF $16 $95,397.23 $95,397Vacuum Interface Valve/Buffer Chamber (On Beach) 100 EA $5,099 $509,881.76 $509,882Vacuum Interface Valve/Buffer Chamber (In-Street) 117 EA $5,653 $661,362.63 $661,363Vacuum Station 2 EA $593,128 $1,186,255.52 $1,186,256Asphalt Concret Pavement Restoration 14,800 SY $25 $372,664.00 $372,664Beach Restoration 28,900 SY $21 $601,409.00 $601,4096" Force main to sites 10,560 LF $85 $902,140.80 $902,141Conveyance Pump Stations 2 EA $86,110 $172,220.76 $172,221









Table B6 Community Gravel Filter and SDS O&M (2012) Quartermaster Harbor Communities Wastewater Management Options King County Department of Natural Resources and Parks

Component Total Cost Pumping System Septic Tanks (11 systems 4,000 gal/yr each) $13,200Gravel Filter Treatment Systems Electrical (11 systems) $1,000Subsurface Drip System Electrical (11 systems) $800200 ft Capacity Pump Stations Electrical (2 stations) $2,500Vacuum System Electrical 433 parcels(1) $7,800

Equipment maintenance (2% of equipment capital cost) $40,000Drainfield maintenance (1% of dripfield capital cost) $8,000Labor(2) (2.1 FTE @ $51.94/hr) $227,000

Total Annual Operating Cost $300,300Notes:1. Based on Carnations 2004 Facilities Plan. 2. Assumes 0.4 FTE treatment system, 0.1 FTE dripfield, 0.2 FTE pump stations, 1.4 FTE vacuum system.


PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 6/4/2008LOCATION VASHON ISLAND, WA BY : AMPELEMENT : DECENTRALIZED OPTION - SBR/PERCOLATION POND REVIEWED BY: ALS


Abandon Existing Septic Tanks in place (75% of homes have tanks) 325 EA $600 $194,850.00 $194,850Land Acquisition 7 AC $24,000 $168,000.00 $168,000Site Work - Clear and Grub 7 AC $391 $2,737.00 $2,737Site Work - Fence 2,430 LF $46 $110,565.00 $110,565Site Work - Gravel Road 36,100 SF $6 $198,550.00 $198,550Site Work - Electrical 1 EA $3,000 $3,000.00 $3,000Influent Pumping 1 EA $326,000 $326,000.00 $326,000Screening 2 EA $93,600 $187,200.00 $187,200Odor Control 1 EA $400,000 $400,000.00 $400,000Grit Removal 1 EA $306,000 $306,000.00 $306,000SBR 1 EA $410,000 $410,000.00 $410,000Media Filters 1 EA $663,000 $663,000.00 $663,000UV System 2 EA $178,000 $356,000.00 $356,000Solids storage 1 EA $462,000 $462,000.00 $462,000Site facilities 1 EA $385,000 $385,000.00 $385,000Standby Generator 1 EA $150,000 $150,000.00 $150,000Pond Excavation (4-1 acre ponds) 40,960 CY $10 $409,600.00 $409,600Emergency Pond (24-hr Peak Flow) 2,073 CY $10 $20,733.33 $20,733Emergency Pond Liner 9,760 SF $1 $7,320.00 $7,320Monitoring Stations 6 EA $725 $4,350.00 $4,3506" Gravity Side Sewer 13,000 LF $37 $481,000.00 $481,0006" Vacuum Manifold (On Beach) 8,000 LF $50 $397,432.52 $397,4336" Vacuum Manifold (In-Street) 9,000 LF $103 $924,433.42 $924,4333" Vacuum Manifold Lateral (On Beach) 5,000 LF $28 $140,981.13 $140,9813" Vacuum Manifold Lateral (In-Street) 5,800 LF $16 $95,397.23 $95,397Vacuum Interface Valve/Buffer Chamber (On Beach) 100 EA $5,099 $509,881.76 $509,882Vacuum Interface Valve/Buffer Chamber (In-Street) 117 EA $5,653 $661,362.63 $661,363Vacuum Station 2 EA $593,128 $1,186,255.52 $1,186,256Asphalt Concret Pavement Restoration 14,800 SY $25 $372,664.00 $372,664Beach Restoration 28,900 SY $21 $601,409.00 $601,4096" Force Main to Treatment/Discharge Site 7,920 LF $85 $676,605.60 $676,606Conveyance Pump Stations 2 EA $86,110 $172,220.76 $172,221








SBR cost based on a preliminary estimate from Fluidyne. UV and screening costs based an preliminary estimates from Zenon. The UV costs were marked up by a factor of 100% for piping, 30% for electricaland 20% for instrumentation and control. The screening costs were marked up by a factor of 50% for piping, 30% for electrical and 20% for instrumentation and control. The costs for the remaining elements: influent pumping, grit removal, solids storage and site facilities were based on cost models.


Table B8 SBR and Percolation Pond O&M Costs (2012) Quartermaster Harbor Communities Wastewater Management Options King County Department of Natural Resources and Parks

Component Total Cost SBR Treatment System Electrical $10,300 Vacuum System Electrical 433 parcels(1) $7,800200 ft Capacity Pump Stations Electrical (2 stations) $2,500Solids Handling $78,000 SBR Equipment Maintenance (2% of capital cost) $11,000 Percolation Pond Maintenance (1% of capital cost) $4,000 Labor(2) (1.9 FTE @ $51.94/hr) $205,300

Total Annual Operating Cost $318,900Notes:1. Based on Carnations 2004 Facilities Plan. 2. Assumes 0.3 FTE treatment system/percolation pond, 0.2 FTE pump stations, 1.4 FTE vacuum system.


PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 6/4/2008LOCATION :VASHON ISLAND, WA BY : AMPELEMENT : DECENTRALIZED OPTION - MBR/PERCOLATION POND REVIEWED BY: ALS


Abandon Existing Septic Tanks in place (75% of homes have tanks) 325 EA $600 $194,850.00 $194,850Land Acquisition 7 AC $24,000 $168,000.00 $168,000Site Work - Clear and Grub 7 AC $391 $2,737.00 $2,737Site Work - Fence 2,430 LF $46 $110,565.00 $110,565Site Work - Gravel Road 36,100 SF $6 $198,550.00 $198,550Site Work - Electrical 1 EA $3,000 $3,000.00 $3,000Influent Pumping 1 EA $326,000 $326,000.00 $326,000Screening 2 EA $93,600 $187,200.00 $187,200Odor Control 1 EA $400,000 $400,000.00 $400,000Grit Removal 1 EA $306,000 $306,000.00 $306,000MBR 2 EA $525,000 $1,050,000.00 $1,050,000UV System 2 EA $178,000 $356,000.00 $356,000Solids storage 1 EA $462,000 $462,000.00 $462,000Site facilities 1 EA $385,000 $385,000.00 $385,000Standby Generator 1 EA $150,000 $150,000.00 $150,000Pond Excavation (4-1 acre ponds) 40,960 CY $10 $409,600.00 $409,600Emergency Pond (24-hr Peak Flow) 2,073 CY $10 $20,733.33 $20,733Emergency Pond Liner 9,760 SF $1 $7,320.00 $7,320Monitoring Stations 6 EA $725 $4,350.00 $4,3506" Gravity Side Sewer 13,000 LF $37 $481,000.00 $481,0006" Vacuum Manifold (On Beach) 8,000 LF $50 $397,432.52 $397,4336" Vacuum Manifold (In-Street) 9,000 LF $103 $924,433.42 $924,4333" Vacuum Manifold Lateral (On Beach) 5,000 LF $28 $140,981.13 $140,9813" Vacuum Manifold Lateral (In-Street) 5,800 LF $16 $95,397.23 $95,397Vacuum Interface Valve/Buffer Chamber (On Beach) 100 EA $5,099 $509,881.76 $509,882Vacuum Interface Valve/Buffer Chamber (In-Street) 117 EA $5,653 $661,362.63 $661,363Vacuum Station 2 EA $593,128 $1,186,255.52 $1,186,256Asphalt Concret Pavement Restoration 14,800 SY $25 $372,664.00 $372,664Beach Restoration 28,900 SY $21 $601,409.00 $601,4096" Force Main to Treatment/Discharge Site 7,920 LF $85 $676,605.60 $676,606Conveyance Pump Stations 2 EA $86,110 $172,220.76 $172,221










Table B10 MBR and Percolation Pond O&M Costs (2012) Quartermaster Harbor Communities Wastewater Management Options King County Department of Natural Resources and Parks

Component Total Cost MBR Treatment System Electrical $9,700 Vacuum System Electrical 433 parcels(1) $7,800200 ft Capacity Pump Stations Electrical (2 stations) $2,500Solids Handling $78,000 MBR Equipment Maintenance (2% of capital cost) $23,000 MBR Chemicals and Membrane Replacement $10,200 Percolation Pond Maintenance (1% capital cost) $4,000 Labor(2) (1.9 FTE @ $50/hr) $205,300

Total Annual Operating Cost $340,500Notes:1. Based on Carnations 2004 Facilities Plan. 2. Assumes 0.3 FTE treatment system/percolation pond, 0.2 FTE pump stations, 1.4 FTE vacuum system.


PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 2/26/2008LOCATION VASHON ISLAND, WA BY : ARCELEMENT : HOLDING TANK CAPITAL COST - SINGLE FAMILY REVIEWED BY: AMP


1.5" Laterals Grinder Pump systems 300 LF $18 $5,283 $5,283E-One DH071-093 Grinder Pump 1 EA $3,600 $3,600.00 $3,6001,250 Gallon Concrete Holding Tank 1 EA $858 $858.00 $858

Grinder Pump Placement Sitework 1 EA $311 $311.37 $311Holding Tank Excavation (assuming 8' Tank Diameter) 8 LF $275 $2,203.20 $2,203

DIRECT COST $12,256

CONTINGENCY 0% $0SUBTOTAL $12,256

MOB/DEMOB (5%), GENERAL CONDITIONS (10%), OH&P (10%) 27% $3,309

TOTAL ESTIMATED CONSTRUCTION COST (LOW ESTIMATE) $15,565

CONTINGENCY 100% $12,256SUBTOTAL $24,511


TOTAL ESTIMATED CONSTRUCTION COST (HIGH ESTIMATE) $31,129



PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 2/26/2008LOCATION : VASHON ISLAND, WA BY : ARCELEMENT : HOLDING TANK RECURRING COSTS - SINGLE FAMILY REVIEWED BY: AMP


Sewage Hauling Cost (Community Holding Tanks) 1 YEAR $18,824 $18,824 $18,824Holding Tank Maintenance Check 1 YEAR $80 $80 $80Grinder Pump O&M (Electrical, maintenance, repair) 1 YEAR $50 $50 $50Grinder Pump Replacement Cost (Based on a 10-year service life) 1 YEAR $360 $360 $360

TOTAL RECURRING COST $19,314


PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 2/26/2008LOCATION : VASHON ISLAND, WA BY : ARCELEMENT : HOLDING TANK CAPTIAL COST - MULTI-FAMILY REVIEWED BY: AMP


1.5" Laterals Grinder Pump systems 2,400 LF $18 $42,264 $42,264E-One DH071-093 Grinder Pump 8 EA $3,600 $28,800 $28,8006,916 Gallon Fiberglass Holding Tank 1 EA $18,023 $18,023 $18,023

Grinder Pump Placement Sitework 8 EA $311 $2,491 $2,491Holding Tank Excavation (assuming 8' Tank Diameter) 27 LF $275 $7,436 $7,436

DIRECT COST $99,014

CONTINGENCY 0% $0SUBTOTAL $99,014


TOTAL ESTIMATED CONSTRUCTION COST (LOW ESTIMATE) $125,747

CONTINGENCY 100% $99,014SUBTOTAL $198,027


TOTAL ESTIMATED CONSTRUCTION COST (HIGH ESTIMATE) $251,494



PROJECT : QTRM HARB COMM WW MANGAMENT OPTSJOB # : 6881E00 DATE : 2/26/2008LOCATION : VASHON ISLAND, WA BY : ARCELEMENT : HOLDING TANK RECURRING COSTS - MULTI-FAMILY REVIEWED BY: AMP


Sewage Hauling Cost (Community Holding Tanks) 1 YEAR $119,808 $119,808 $119,808Holding Tank Maintenance Check 1 YEAR $80 $80 $80Grinder Pump O&M (Electrical, maintenance, repair) 8 YEAR $50 $400 $400Grinder Pump Replacement Cost (Based on a 10-year service life) 8 YEAR $360 $2,880 $2,880

TOTAL RECURRING COST $123,168

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Table B16 Life Cycle Cost Analysis Centralized Treatment OptionLifetime 20 Please provide the appropriate information in the shaded area.First year of O&M costs 2012Electricity Supplier (SCL or PSE) PSEPlant or Off-Site Plant

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031

Benefits - discounted to 2007 WTD $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 WTD $0 $0 $0 $0 $14,284,356 $646,580 $634,676 $623,003 $611,558 $600,336 $589,332 $578,543 $567,963 $557,588 $547,415 $537,439 $527,656 $518,063 $508,655 $499,429 $478,148 $469,536 $461,090 $452,806 $444,680Debt-related/O&M/risk/uncertainty - WTD discount rate $0 $0 $0 $0 $1,174,900 $1,516,784 $1,486,276 $1,456,398 $1,427,137 $1,398,480 $1,370,414 $1,342,926 $1,316,006 $1,289,640 $1,263,817 $1,238,526 $1,213,756 $1,189,495 $1,165,734 $1,142,461 $1,107,433 $1,085,369 $1,063,757 $1,042,589 $444,680Benefits - discounted to 2007 7% $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $11,881,330 $513,604 $481,458 $451,334 $423,103 $396,647 $371,853 $348,616 $326,838 $306,428 $287,298 $269,368 $252,563 $236,811 $222,046 $208,207 $190,364 $178,522 $167,421 $157,014 $147,256Debt-related/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $977,249 $1,204,839 $1,127,473 $1,055,086 $987,358 $923,988 $864,695 $809,216 $757,305 $708,733 $663,284 $620,757 $580,964 $543,728 $508,885 $476,280 $440,899 $412,668 $386,248 $361,525 $147,256Total Benefits $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital and O&M $0 $0 $0 $0 $15,574,000 $720,356 $722,539 $724,743 $726,970 $729,219 $731,491 $733,785 $736,103 $738,443 $740,807 $743,195 $745,606 $748,041 $750,501 $752,986 $736,648 $739,182 $741,742 $744,327 $746,939Debt-related and O&M $0 $0 $0 $0 $1,280,974 $1,689,850 $1,692,033 $1,694,237 $1,696,464 $1,698,713 $1,700,985 $1,703,279 $1,705,597 $1,707,937 $1,710,301 $1,712,688 $1,715,100 $1,717,535 $1,719,995 $1,722,480 $1,706,142 $1,708,676 $1,711,236 $1,713,821 $746,939Risk $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Uncertainty $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

Capital outlays $15,574,000Debt issuance $0 $0 $0 $0 $311,480Debt service $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $969,494 $0

Energy use $0 $0 $0 $0 $0 $13,049 $13,180 $13,312 $13,445 $13,579 $13,715 $13,852 $13,991 $14,131 $14,272 $14,415 $14,559 $14,704 $14,851 $15,000 $15,150 $15,301 $15,454 $15,609 $15,765Natural Gas $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

therms - - - - -

Electricity $0 $0 $0 $0 $0 $13,049 $13,180 $13,312 $13,445 $13,579 $13,715 $13,852 $13,991 $14,131 $14,272 $14,415 $14,559 $14,704 $14,851 $15,000 $15,150 $15,301 $15,454 $15,609 $15,765Electricity Use MWH - - - - - 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0 194.0

Demand kW or kVa - - - - -

Materials and Supplies - Equipment Replacement $0 $0 $0 $0 $0 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $30,000 $241,605 $241,605 $241,605 $241,605 $241,605

Other Costs - KC Capacity Charge and Sewer Rate $0 $0 $0 $0 $0 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $472,057 $241,605 $241,605 $241,605 $241,605 $241,605

Labor $0 $0 $0 $0 $0 $205,250 $207,302 $209,375 $211,469 $213,584 $215,720 $217,877 $220,055 $222,256 $224,479 $226,723 $228,991 $231,281 $233,593 $235,929 $238,289 $240,671 $243,078 $245,509 $247,964Labor Hours 0 0 0 0 0 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952 3952

Vashon Alts LCA_FM,ST, SBR,MBR,GF.xls- force main8/21/2008 Page 1 of 5

Table B17 Life Cycle Cost Analysis Decentralized Treatment Septic Tanks/Community Drainfield OptionLifetime 20 Please provide the appropriate information in the shaded area.First year of O&M costs 2012Electricity Supplier (SCL or PSE) PSEPlant or Off-Site Plant

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031

Benefits - discounted to 2007 WTD $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 WTD $0 $0 $0 $0 $22,578,527 $284,665 $280,826 $277,043 $273,315 $269,641 $266,021 $262,453 $258,937 $255,472 $252,057 $248,691 $245,374 $242,105 $238,882 $235,706 $232,575 $229,489 $226,448 $223,449 $220,494Debt-related/O&M/risk/uncertainty - WTD discount rate $0 $0 $0 $0 $1,857,102 $1,660,149 $1,626,905 $1,594,346 $1,562,457 $1,531,225 $1,500,635 $1,470,674 $1,441,329 $1,412,587 $1,384,436 $1,356,863 $1,329,855 $1,303,402 $1,277,492 $1,252,112 $1,227,253 $1,202,903 $1,179,052 $1,155,689 $220,494Benefits - discounted to 2007 7% $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $18,780,191 $226,120 $213,031 $200,703 $189,091 $178,154 $167,852 $158,148 $149,007 $140,397 $132,286 $124,646 $117,448 $110,668 $104,281 $98,263 $92,595 $87,254 $82,223 $77,483 $73,017Debt-related/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $1,544,686 $1,318,720 $1,234,153 $1,155,022 $1,080,978 $1,011,693 $946,861 $886,194 $829,424 $776,300 $726,588 $680,068 $636,535 $595,795 $557,671 $521,992 $488,603 $457,355 $428,112 $400,743 $73,017Total Benefits $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital and O&M $0 $0 $0 $0 $24,617,000 $317,145 $319,702 $322,285 $324,894 $327,529 $330,190 $332,878 $335,593 $338,335 $341,104 $343,902 $346,727 $349,580 $352,462 $355,372 $358,312 $361,281 $364,280 $367,309 $370,368Debt-related and O&M $0 $0 $0 $0 $2,024,768 $1,849,573 $1,852,130 $1,854,713 $1,857,322 $1,859,957 $1,862,618 $1,865,306 $1,868,021 $1,870,763 $1,873,532 $1,876,329 $1,879,154 $1,882,008 $1,884,889 $1,887,800 $1,890,740 $1,893,709 $1,896,708 $1,899,736 $370,368Risk $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Uncertainty $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0


$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $1,532,428 $0


therms - - - - -

Electricity $0 $0 $0 $0 $0 $7,285 $7,358 $7,431 $7,505 $7,581 $7,656 $7,733 $7,810 $7,888 $7,967 $8,047 $8,127 $8,209 $8,291 $8,374 $8,457 $8,542 $8,627 $8,714 $8,801Electricity Use MWH - - - - - 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3 108.3


Materials and Supplies - Equipment Maintenance $0 $0 $0 $0 $0 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700 $26,700

Other Costs - Septic Tank Pumping $0 $0 $0 $0 $0 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700 $34,700


Benefits

1234

Vashon Alts LCA_FM,ST, SBR,MBR,GF.xls- septic comm field8/21/2008 Page 2 of 5

Table B18 Life Cycle Cost Analysis Decentralized Treatment Recirculating Gravel Filter and Subsurface Drip System OptionLifetime 20 Please provide the appropriate information in the shaded area.First year of O&M costs 2012Electricity Supplier (SCL or PSE) PSEPlant or Off-Site Plant

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031

Benefits - discounted to 2007 WTD $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 WTD $0 $0 $0 $0 $32,956,101 $269,427 $265,767 $262,160 $258,606 $255,105 $251,655 $248,255 $244,906 $241,605 $238,352 $235,146 $231,988 $228,875 $225,807 $222,784 $219,804 $216,867 $213,973 $211,121 $208,309Debt-related/O&M/risk/uncertainty - WTD discount rate $0 $0 $0 $0 $2,710,666 $2,277,114 $2,230,533 $2,184,925 $2,140,267 $2,096,540 $2,053,724 $2,011,800 $1,970,750 $1,930,555 $1,891,196 $1,852,657 $1,814,919 $1,777,967 $1,741,783 $1,706,352 $1,671,657 $1,637,683 $1,604,415 $1,571,838 $208,309Benefits - discounted to 2007 7% $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $27,411,969 $214,017 $201,608 $189,922 $178,916 $168,550 $158,788 $149,593 $140,933 $132,776 $125,093 $117,857 $111,041 $104,620 $98,573 $92,876 $87,510 $82,455 $77,693 $73,208 $68,982Debt-related/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $2,254,656 $1,808,799 $1,692,058 $1,582,866 $1,480,733 $1,385,202 $1,295,845 $1,212,263 $1,134,083 $1,060,954 $992,549 $928,563 $868,710 $812,723 $760,351 $711,360 $665,532 $622,663 $582,560 $545,046 $68,982Total Benefits $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital and O&M $0 $0 $0 $0 $35,931,500 $300,169 $302,559 $304,973 $307,410 $309,872 $312,359 $314,871 $317,407 $319,970 $322,557 $325,171 $327,810 $330,477 $333,169 $335,889 $338,636 $341,410 $344,212 $347,043 $349,901Debt-related and O&M $0 $0 $0 $0 $2,955,394 $2,536,934 $2,539,323 $2,541,737 $2,544,175 $2,546,637 $2,549,124 $2,551,635 $2,554,172 $2,556,734 $2,559,322 $2,561,935 $2,564,575 $2,567,241 $2,569,934 $2,572,653 $2,575,400 $2,578,175 $2,580,977 $2,583,807 $349,901Risk $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Uncertainty $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

Capital outlays $0 $0 $0 $35,931,500Debt issuance $0 $0 $0 $0 $718,630Debt service $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $2,236,764 $0


therms - - - - -

Electricity $0 $0 $0 $0 $0 $12,114 $12,236 $12,358 $12,481 $12,606 $12,732 $12,860 $12,988 $13,118 $13,249 $13,382 $13,516 $13,651 $13,787 $13,925 $14,064 $14,205 $14,347 $14,491 $14,635Electricity Use MWh - - - - - 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 Demand kW or kVa - - - - -


Other Costs - Septic Tank Pumping $0 $0 $0 $0 $0 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200 $13,200


Vashon Alts LCA_FM,ST, SBR,MBR,GF.xls- recirc filter-SDS8/21/2008 Page 3 of 5

Table B19 Decentralized Treatment Option Sequencing Batch Reactor Percolation Pond OptionLifetime 20 Please provide the appropriate information in the shaded area.First year of O&M costs 2012Electricity Supplier (SCL or PSE) PSEPlant or Off-Site Plant

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031

Benefits - discounted to 2007 WTD $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 WTD $0 $0 $0 $0 $19,192,711 $286,179 $282,045 $277,977 $273,972 $270,031 $266,151 $262,333 $258,575 $254,875 $251,234 $247,649 $244,120 $240,646 $237,227 $233,860 $230,546 $227,282 $224,070 $220,907 $202,988Debt-related/O&M/risk/uncertainty - WTD discount rate $0 $0 $0 $0 $1,578,616 $1,455,400 $1,426,270 $1,397,741 $1,369,798 $1,342,431 $1,315,626 $1,289,372 $1,263,658 $1,238,472 $1,213,804 $1,189,642 $1,165,975 $1,142,794 $1,120,089 $1,097,849 $1,076,064 $1,054,726 $1,033,824 $1,013,351 $202,988Benefits - discounted to 2007 7% $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $15,963,964 $227,323 $213,957 $201,380 $189,546 $178,412 $167,934 $158,076 $148,799 $140,069 $131,854 $124,123 $116,848 $110,001 $103,558 $97,494 $91,786 $86,415 $81,359 $76,601 $67,220Debt-related/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $1,313,049 $1,156,080 $1,081,953 $1,012,592 $947,688 $886,955 $830,125 $776,945 $727,182 $680,614 $637,036 $596,256 $558,093 $522,380 $488,959 $457,682 $428,411 $401,017 $375,380 $351,387 $67,220Total Benefits $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital and O&M $0 $0 $0 $0 $20,925,500 $318,833 $321,091 $323,372 $325,676 $328,002 $330,352 $332,726 $335,123 $337,544 $339,990 $342,460 $344,954 $347,474 $350,019 $352,589 $355,185 $357,807 $360,455 $363,129 $340,964Debt-related and O&M $0 $0 $0 $0 $1,721,139 $1,621,462 $1,623,720 $1,626,001 $1,628,305 $1,630,631 $1,632,981 $1,635,355 $1,637,752 $1,640,173 $1,642,619 $1,645,089 $1,647,583 $1,650,103 $1,652,648 $1,655,218 $1,657,814 $1,660,436 $1,663,084 $1,665,758 $340,964Risk $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Uncertainty $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0


$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $1,302,629 $0

Energy use $0 $0 $0 $0 $0 $20,583 $20,789 $20,997 $21,207 $21,419 $21,633 $21,849 $22,068 $22,288 $22,511 $22,736 $22,964 $23,193 $23,425 $23,660 $23,896 $24,135 $24,377 $24,620 $0Natural Gas $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

therms - - - - -

Electricity $0 $0 $0 $0 $0 $20,583 $20,789 $20,997 $21,207 $21,419 $21,633 $21,849 $22,068 $22,288 $22,511 $22,736 $22,964 $23,193 $23,425 $23,660 $23,896 $24,135 $24,377 $24,620 $0Electricity Use MWH - - - - - 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0 306.0


Chemical spending $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

Sodium hypochlorite $/gal 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Bisulfite $/gal 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Other - enter $ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0


Other Costs - Solids Handling $0 $0 $0 $0 $0 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000


Vashon Alts LCA_FM,ST, SBR,MBR,GF.xls- SBR8/21/2008 Page 4 of [Pages]

Table B20 Decentralized Treatment Membrane Bioreactor Percolation Pond OptionLifetime 20 Please provide the appropriate information in the shaded area.First year of O&M costs 2012Electricity Supplier (SCL or PSE) PSEPlant or Off-Site Plant

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031

Benefits - discounted to 2007 WTD $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 WTD $0 $0 $0 $0 $19,152,355 $305,623 $301,068 $296,588 $292,181 $287,846 $283,581 $279,386 $275,259 $271,198 $267,203 $263,273 $259,406 $255,601 $251,858 $248,174 $244,550 $240,983 $237,474 $234,020 $216,205Debt-related/O&M/risk/uncertainty - WTD discount rate $0 $0 $0 $0 $1,575,296 $1,472,385 $1,442,887 $1,413,998 $1,385,703 $1,357,991 $1,330,849 $1,304,266 $1,278,229 $1,252,727 $1,227,749 $1,203,285 $1,179,323 $1,155,852 $1,132,863 $1,110,346 $1,088,290 $1,066,687 $1,045,526 $1,024,798 $216,205Benefits - discounted to 2007 7% $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $15,930,396 $242,768 $228,387 $214,863 $202,144 $190,182 $178,932 $168,351 $158,400 $149,039 $140,235 $131,954 $124,165 $116,837 $109,945 $103,461 $97,362 $91,624 $86,226 $81,148 $71,597Debt-related/O&M/risk/uncertainty - discounted to 2007 7% $0 $0 $0 $0 $1,310,288 $1,169,572 $1,094,559 $1,024,369 $958,692 $897,236 $839,730 $785,920 $735,566 $688,447 $644,355 $603,094 $564,482 $528,349 $494,535 $462,892 $433,278 $405,565 $379,629 $355,356 $71,597Total Benefits $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Capital and O&M $0 $0 $0 $0 $20,881,500 $340,495 $342,748 $345,023 $347,321 $349,642 $351,987 $354,355 $356,746 $359,162 $361,601 $364,065 $366,554 $369,068 $371,606 $374,170 $376,760 $379,376 $382,017 $384,686 $363,164Debt-related and O&M $0 $0 $0 $0 $1,717,520 $1,640,385 $1,642,637 $1,644,913 $1,647,211 $1,649,532 $1,651,877 $1,654,245 $1,656,636 $1,659,052 $1,661,491 $1,663,955 $1,666,444 $1,668,958 $1,671,496 $1,674,060 $1,676,650 $1,679,266 $1,681,907 $1,684,575 $363,164Risk $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0Uncertainty $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0


$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

$0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0$1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $1,299,890 $0

Energy use $0 $0 $0 $0 $0 $20,045 $20,245 $20,448 $20,652 $20,859 $21,067 $21,278 $21,491 $21,706 $21,923 $22,142 $22,363 $22,587 $22,813 $23,041 $23,271 $23,504 $23,739 $23,977 $0Natural Gas $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

therms - - - - -

Electricity $0 $0 $0 $0 $0 $20,045 $20,245 $20,448 $20,652 $20,859 $21,067 $21,278 $21,491 $21,706 $21,923 $22,142 $22,363 $22,587 $22,813 $23,041 $23,271 $23,504 $23,739 $23,977 $0Electricty Use MWH - - - - - 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 298.0 Demand kW or kVa - - - - - -

Chemical spending $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

Sodium hypochlorite $/gal 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Bisulfite $/gal 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Other - enter $ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0


Other Costs - Solids Handling $0 $0 $0 $0 $0 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000 $78,000


Vashon Alts LCA_FM,ST, SBR,MBR,GF.xls- MBR8/21/2008 Page 5 of 5

APPENDIX C CALCULATIONS

Holding Tank Capacity Sample Calculations:

Sample Calculation: Households served per holding tank

TLVC = (DSF)(PSF)+(DSF)(3 days) Where: TLVC = total liquid volume capacityDSF = daily sewage flow

for PSF = 7 days PSF = pumping service frequencyand TLVC = 6,000 gallons:

6,000 gal = (DSF)(10 days)

DSF = 600 gal/day

DSF = (H)(SF) Where: H = number of households

600 gal/day = (H)(120 gal/day)

H = 5

Sample Calculation: Households served per service period

H = (LVCT)/(SF*PSF) Where:

for LVCT = 3,000 galSF = 120 gal/dayPSF = 3.5 days

H = 7.14

SF = sewage flow per household per day = 120 gal/day

LVCT = Liquid Volume Capacity of the tanker

APPENDIX D PRODUCT DATA

Approved King County Wastewater TanksAs of 8/29/05

Company Tank Size KC ID # Usage MaterialCampbell’s Pre-Cast

11515 120th St E Puyallup, WA 98373

8901125

CP 89 CP 112

Pump Tank OnlySeptic/Pump/Holding

ConcreteConcrete

Cuz Concrete19521 63rd Ave NE

Arlington, WA 98223

10001250150017501750

CCP 10-2 CCP 125-2 CCP 150-2

CCP 1750-2 CCP 1750

Septic/Pump/HoldingSeptic/Pump/HoldingSeptic/Pump/Holding

Septic Tank OnlyPump Tank Only

ConcreteConcreteConcreteConcreteConcrete

Evergreen Pre-CastP.O. Box 58

Sumner, WA 98390

1100730

1500150010001000144730003000

EP 110 EP 75

EP 1500EP 1500-2SU 10-2 SUS 10 DF50-2

EP 300 S EP 300 P

Septic/Pump/HoldingPump Tank

Pump/HoldingSeptic/Pump/HoldingSeptic/Pump/HoldingSeptic/Pump/Holding

ATU (Whitewater) w/trash tank Septic/Holding

Septic/Pump/Holding

ConcreteConcreteConcreteConcreteConcreteConcreteConcreteConcreteConcrete

FSI International (Xerxes)4704 Tieton Dr Ste B Yakima, WA 98908

68026916

ST618.945.01PT618.946.01

Septic Tank Pump/Holding

FiberglassFiberglass

Northwest CascadeP.O. Box 7339

Puyallup, WA 98373

750100011251750

SC-75SC-10CS 112 SC-175

Pump Tank OnlySeptic/Pump/HoldingSeptic/Pump/HoldingSeptic/Pump/Holding

ConcreteConcreteConcreteConcrete

NORWESCOFluid Systems Division

4365 Steiner St St Bonifacius, MN 55375

100012501500

NO-10-2NO-125-2NO-150-2

Septic Tanks OnlyNot for use as a pump tank or

holding tank(must have 2 manholes)

PolyethylenePolyethylenePolyethylene

Orenco Systems, Inc.814 Airway Ave

Sutherlin, OR 97479

10001000150015001500

T1000-1T1000-22T1500-1

T1500-23T1500-TX

Septic/Pump/HoldingSeptic/Pump/HoldingSeptic/Pump/HoldingSeptic/Pump/Holding

AdvanTex Process Tank

FiberglassFiberglassFiberglassFiberglassFiberglass

Premier PlasticsUnit 107-917 Cliveden Ave

Delta, BC, Canada V3M 6E8

10001300760

STSU1000STSU1300PCU 760*

Septic Tank Septic/Holding

*For Repairs - Pump Tank Only(proposed use requires site specific approval from the health officer)

PolyethylenePolyethylenePolyethylene

Puget Sound Concrete P.O. Box 436

Carnation, WA 98014

75010001250150010001251150017501750899

1159

PS 7 PS 1000-2PS 1250-2PS 1500-2PS 1000-PPS 1250-PPS 1500-PPS 1750-2PS 1750-PPS DF-50 PS DF-60

Pump Tank OnlySeptic Tank Septic Tank Septic Tank

Pump/HoldingPump/HoldingPump/Holding

Septic Tank Pump/Holding

ATU (Whitewater)ATU (Whitewater)

ConcreteConcreteConcreteConcreteConcreteConcreteConcreteConcreteConcreteConcreteConcrete

C:\Documents and Settings\ingj\Local Settings\Temporary Internet Files\OLK39\Approved WastewaterTanks 8 26 05.doc

Quadel Industries IncP.O. Box 1047

Coos Bay OR 97420

1000 Q 10-2 Septic Tank Only

Not for use as a pump tank or holding tank

Polyethylene

Quality Concrete ProductsP.O. Box 1703

Woodinville, WA 98072

1000 QCP 10-2 Septic/Pump/Holding Concrete

Roto Tech Industries 201 Carlisle

Coos Bay, OR 974420

10001250

1060110460

Septic Tank OnlyNot for use as a pump tank or

holding tank

PolyethylenePolyethylene

Sno-Valley Concrete19401 State Route 203

Monroe, WA 98272

7501000

SVC 750 SVC 10-2

PumpSeptic/Pump/Holding

ConcreteConcrete

Note: Always follow manufacturers directions for installation and maintenance

C:\Documents and Settings\ingj\Local Settings\Temporary Internet Files\OLK39\Approved WastewaterTanks 8 26 05.doc

As Established in Chapters 246-272A & 246-272B WAC, On-site Sewage Systems

List of ApprovedOn-site Sewage TanksJanuary 16, 2008

��

��

As Established in Chapters 246-272A & 246-272B WAC, On-Site Sewage Systems

List of ApprovedOn-site Sewage Tanks January 16, 2008

��

For more information or additional copies of this document, contact:

Wastewater Management Section Washington State Department of Health PO Box 47824 Olympia, WA 98504-7824

Phone: 360-236-3062 Fax: 360-236-2257 Web: http://www.doh.wa.gov/wastewater.htm

Secretary of Health Mary Selecky

For persons with disabilities, this document is available upon request in other formats. To submit a request, please call 1-888-586-9427 (TDD/TTY 1-800-833-6388).

Para personas discapacitadas, este documento está disponible a su pedido en otros formatos. Para hacer su pedido llame al 1-888-586-9427 (TDD/TTY 1-800-833-6388).

DOH Publication #337-023 Effective: 07-01-2007

List of Approved On-site Sewage Tanks

Washington State Department of Health Page 5 List of Approved On-site Sewage Tanks January 16, 2008

Table of Contents

SECTION 1 – Introduction and Overview ...............................................7

SECTION 2 – List of Concrete Tanks Approved by Local Health Jurisdictions.........................8

SECTION 3 – List of Concrete Tanks Approved by Washington State Department of Health23

SECTION 4 – List of Non-Concrete Tanks Approved by WA State Dept. of Health .........................26

NOTE: The presence of a product on this list does not constitute approval of marketing, advertising, or labeling practices employed by manufacturer, nor is it an affirmation of manufacturer claims of product performance. Approval listing does not constitute endorsement of these products by the Washington State Department of Health. Information obtained from the sources listed is the sole responsibility of the manufacturer or other provider.

List of Approved On-site Sewage Tanks


SECTION 1 – Introduction and Overview

Chapter 246-272A WAC takes full effect on July 1, 2007 (WAC 246-272 ceases to exist). Chapter 246-272A WAC allows only sewage tanks that have been reviewed and approved by the Department to be used. Sewage tank is defined as a prefabricated or cast-in-place septic tank, pump tank/dosing chamber, holding tank, grease interceptor, recirculating filter tank or any other tanks as they relate to on-site sewage systems including tanks for use with proprietary products. The approved sewage tanks are currently listed in the “List of Approved Systems and Products”.

On March 15, 2007 the current “List of Approved Systems and Products” will cease to exist. This document “List of Approved On-Site Sewage Tanks” will replace the list of approved wastewater tanks on the “List of Approved Systems and Products”. All the sewage tanks listed on the “List of Approved Systems and Products” will transfer over to the “List of Approved On-Site Sewage Tanks”.

The following sections present manufacturer and product information for various sewage tanks. This information is presented in the following lists:

�� Concrete Tanks Approved by Local Health Jurisdictions (statewide, by county) These tanks, approved by local health departments / districts, are acceptable to Department of Health and may be used in that local health department/district.

Please note that some local health jurisdictions do not have a formal process for evaluating wastewater tanks. Designers are advised to check with the local health jurisdiction to confirm which tanks are permitted.

This list is frequently updated, yet may not contain all tanks in current use in a given county. Local health jurisdictions may add or make corrections to this list by contacting the department.

�� Concrete Tanks Approved by the Washington State Department of Health This list reflects information about sewage tank reviews and approvals by the department since January 1, 1995. These tanks may be used statewide.

�� Non-Concrete Tanks Approved by the Washington State Department of HealthThis list contains tanks constructed with fiberglass or polyethylene. This list reflects information about sewage tank reviews and approvals by the department since January 1, 1995. These tanks may be used statewide.

Answers to questions regarding sewage tank standards or information about application for product review and approval may be obtained from Mamdouh El-Aarag, P.E. at (509) 456-2754 or [email protected].

List of Approved On-Site Sewage Tanks January 16, 2008


Concrete Tanks Approved by Local Health Jurisdictions

County ManufacturerNumber of Compartments

Liquid Capacity (gallons)

Everett Bros. Construction Co. PO Box 761 Oak Harbor, WA 98277 (360) 675-2727

Not provided 1,000

Pacific Pre-Cast PO Box 1761 Oak Harbor, WA 98277 (360) 679-0702 (360) 675-9560

Not provided 1,000

Stanwood Redi-Mix 2431 Larson Road Stanwood, WA 98292 (360) 652-7777

Not provided 1,000 1,200

Whidbey Island Sand & Gravel PO Box 434 Freeland, WA 98249 (360) 321-6101

Not provided 1,000

Island (cont’d)

William Crane & Precast PO Box 638 Freeland, WA 98249 (800) 755-5506

Not provided 1,000 1,250

Jefferson Cotton Ready Mix One........................... Two...........................

700 (pump) 1,000

Legend forSeattle/King Co. liquid capacity:

P = Pump tank S = Septic tank H = Holding tank

Campbell’s Pre-Cast 11515 120th St E Puyallup, WA 98373

890 P 1,125 PSH

KingSeattle/King Co. Public Health

Cuz Concrete 19521 63rd Ave NE Arlington, WA 98223

1,000 PSH 1,250 PSH 1,500 PSH 1,750 S 1,750 P 3,000 P 3,000 S



Concrete Tanks Approved by Local Health Jurisdictions

County ManufacturerNumber of Compartments


Evergreen Pre-Cast PO Box 58 Sumner, WA 98390

1,100 PSH 730 P 1,500 P 1,500 PSH 1,000 PSH 1,000 PSH 1,447 3,000 SH 3,000 PSH

Northwest Cascade PO Box 7339 Puyallup, WA 98373

750 P 1,000 PSH 1,125 PSH 1,200 S 1,200 PS 1,750 PSH

Puget Sound Concrete PO Box 436 Carnation, WA 98014

750 P 1,000 S 1,250 S 1,500 S 1,000 PH 1,251 PH 1,500 PH 1,750 S 1,750 PH 899 1,159

Quality Concrete Products PO Box 1703 Woodinville, WA 98072

1,000 PSH

KingSeattle/King Co. Public Health (cont’d)

Sno-Valley Concrete 19401 State Route 203 Monroe, WA 98272

750 P 1,000 PSH

Kitsap Evergreen Pre-Cast, Inc. PO Box 58 Sumner, WA 98390 (253) 863-6510

One........................... One........................... Two........................... Two........................... One...........................

750 (pump) 1,100 (pump) 1,100 (septic) 1,500 (septic) 1,700 (pump)



SECTION 4 – List of Non-Concrete Tanks Approved by WA State Dept. of Health

List of Non-Concrete Tanks Approved by WA State Dept. of Health

Description Manufacturers Number of Compartments/Model #


Containment Solutions, Inc. 5150 Jefferson Chemical Road Conroe, TX 77301-6834 (936) 756-7731 Ext 201 (936) 756-7766 Fax

Three ............................ Model SWT D-6 (6’)...... Model SWT G-6 (8’) ..... Model SWT D-6 (10’)....

15,000 (Max) 25,000 (Max) 50,000 (Max) (February 2005)

Fextex Systems, Inc. 732 North 16th AVE Suite 21 Yakima, WA 98902 (509) 965-8437

One, Two, or Three ..... One, Two, or Three ..... One, Two, or Three ..... One, Two, or Three ..... One, Two, or Three ..... One, Two, or Three ..... One, Two, or Three ..... One, Two, or Three .....

3,000 4,000 6,000 8,000 10,00012,00015,00020,000

Orenco Systems, Inc. 814 Airway Avenue Sutherlin, OR 97479 (800) 348-9843 (541) 459-4449 (541) 459-2884 Fax

One............................... One or Two................... Two...............................

24” “Ultra-Rib” 30” “Perma-Loc IV”

750 1,000 1,500 (February 2002)

Pump Basins (July 2006)

Two............................... Two............................... Two............................... Two............................... Two...............................

1,000 1,250 1,500 1,800 2,000 (August 1995)

FIBERGLASS

Western Industrial Laminations, LTD. 301 - 19837 Telegraph Trail Langley, B.C. V3A 4P8 CANADA (604) 986-8070

Minimum soil cover over the top of the tank is 3 feet. Maximum soil cover over the top of the Standard tank shall be 6 feet. Maximum soil cover over the top of the Heavy Duty (Traffic Bearing) tank shall be 8 feet. In sites with the water table above the bottom of the tank, a hold-down slab per the manufacturer’s specifications is required for tank anti-floatation.

Packaged Plants for Water and Wastewater Treatment

GEWater & Process TechnologiesZENON Membrane Solutions

How Membranes WorkMembranes are based on filtration methods found throughout nature. ZeeWeed membranes are hollow polymer fibers with billions of microscopic pores on the surface. The pores are much smaller in size than common contaminants, bacteria and viruses. This physical barrier only allows clean water to pass through while rejecting impurities—guaranteeing an exceptional water quality and clarity on a continuous basis. A slight vacuum is all that is required to draw water into the membrane fiber and filter out impurities.

s

ZeeWeed packaged plants provide large-scale performance in a compact pre-assembled system

Incorporating a simple and expandable building-block design, ZENON packaged plants can be quickly set up in virtually any location and feature scalable treatment capacity that can be increased as demand grows. These highly automated, plug-and-play UF systems outperform conventional treatment alternatives in all categories, offering superior treated water quality that meets or exceeds regulatory requirements, reduced operating costs, smaller plant footprints, and highly reliable performance—at a price that is comparable to conventional systems.

Municipal Drinking Water Township of Tay, ON - 70,000 gpd (265 m3/d)

Z-BOX M

Municipal Wastewater TreatmentHuntsville, TN - 300,000 gpd (1,136 m3/d) ADF*

Packaged Equipment Skids Z-MOD L

Decentralized TreatmentOffice Park, Oakville, ON - 17,500 gpd (66 m3/d) ADF*

Z-MOD S

* Average Daily Flow

Pre-assembled and factory tested systems offer:

Reduced on-site construction costs with less interconnecting requirements;Quick delivery with complete engineering package already completed;Cost-effective solutions for virtually all water and wastewater treatment applications;Comprehensive cleaning capability for peak system performance;

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Simple and highly automated operation and in-situ membrane cleaning;Modular building-block design;Simplified start up with minimal installation time;Compact footprint with flexible layout options;Greenfield or retrofit solutions.

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Water Treatment & Tertiary Systems

Z-BOX Sup to 400,000 gpd (1,514 m3/d)

Fully integrated process and control components

Less than 6-foot (1.8-meter) tall system readily fits into any building

Side-loading membrane door for easy access

Z-BOX Mup to 350,000 gpd (1,325 m3/d)

Equipped with rugged reinforced membranes to withstand the harshest environments and the most difficult-to-treat water sources

Fully-integrated, skid-mounted system

Z-BOX Lup to 3.25 MGD (12,300 m3/d)

Easily fits beneath a 9-foot (2.7-meter) ceiling

Side loading membrane door for easy access

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Z-MOD S up to 80,000 gpd (303 m3/d)*

Fully integrated wastewater treatment plant

Can be buried or installed above ground (smaller flows available for below ground systems)

Complete plug-and-play design with all components in a single tank

Can operate at MLSS concentrations between 3,000 and 15,000 mg/L

Z-MOD Mup to 110,000 gpd (416 m3/d)*

Fully integrated skid-mounted system


Z-MOD Lup to 1 MGD (3,785 m3/d)*

Containerized or skid-mounted components

Dual-train systems


Z-MOD Xup to 4.0 MGD (15,142 m3/d)*

Equipment skid comes complete with permeate pump, process blower, RAS pump, PLC, MCC, piping and wiring


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Wastewater Treatment Systems

Typical Treated Water ResultsTurbidity ………………………………………………………………………………………………………… < 0.1 NTUBacteria …………………………………………………………………………………………… > 4-log removalGiardia ……………………………………………………………………………………………… > 4-log removalCryptosporidium …………………………………………………………………………… > 4-log removalVirus - ZeeWeed 500 ………………………………………………………………… > 2.0-log removalVirus - ZeeWeed 1000 ……………………………………………………………… > 3.5-log removalIron …………………………………………………………………………………………………………… < 0.05 mg/L‡

Manganese ……………………………………………………………………………………………… < 0.02 mg/L‡

TSS …………………………………………………………………………………………………………………… < 1 mg/LTOC ……………………………………………………………………………………………… 50 - 90% removal‡†

Arsenic ……………………………………………………………………………………………………………… < 5 µg/L Color ……………………………………………………………………………………………………………… < 5 PCU‡†

‡ pre-treatment required† dependent on raw water quality

Achievable MBR EffluentTurbidity ………………………………………………………………………………………………………… < 0.1 NTUBOD

5 ……………………………………………………………………………………………………………… < 2 mg/L

TSS …………………………………………………………………………………………………………………… < 1 mg/LNH

3-N …………………………………………………………………………………………………………… < 0.5 mg/L

Total Nitrogen ……………………………………………………………………………………………… < 3 mg/L*Total Phosphorous ……………………………………………………………………………… < 0.05 mg/L*Fecal Coliform ……………………………………………………………………………… < 2.2 CFU/100 ml‡

SDI ……………………………………………………………………………………………………………………………… < 2* with appropriate biological design and/or chemical addition‡ after disinfection

* Average Daily Flow

GEWater & Process TechnologiesZENON Membrane Solutions3239 Dundas Street WestOakville, ON L6M 4B2CanadaT 1 905 465 3030F 1 905 465 3050

Visit us online at:www.zenon.com orwww.gewater.com

© 2006 General Electric Company All Rights Reserved

Australia, Perth

Australia, Ingleburn

Barbados, St. Michael

China, Beijing

Germany, Hilden

Hungary, Oroszlány

Hungary, Tatabanya

India, Mumbai

Israel, Kefar Saba

Italy, Melzo, Milan

Netherlands, Duiven

Poland, Tychy

Sao Paulo, Jundiai

Singapore, Singapore

Spain, Madrid

United Arab Emirates, Sharjah

United Kingdom, Sheffield

CanadaBurlington, Ontario

Edmonton, Alberta

Oakville, Ontario

The United StatesAustin, Texas

Minnetonka, Minnesota

Moraga, California

Norfolk, Virginia

San Diego, California

Salt Lake City, Utah

Trevose, Pennsylvania

Watertown, Massachusetts

GE-ZPPWWDW-BR001 0906 NA

APPENDIX F MARINE RECOVERY AREA

9

8

7

6

5

4

3

2

1

YAKIMA

KING

OKANOGAN

GRANT

LEWIS

CHELAN

FERRYCLALLAM STEVENS

ADAMS

LINCOLN

KITTITAS

SKAGIT

PIERCE

WHATCOM

WHITMAN

BENTON

DOUGLAS

KLICKITAT

SPOKANE

JEFFERSON

SNOHOMISH

SKAMANIA

PACIFIC

MASONGRAYSHARBOR

COWLITZ

FRANKLIN

CLARK

PE

ND

OR

EILLE

WALLA WALLA ASOTIN

COLUMBIA

KITSAP

ISLAND

GARFIELD

THURSTON

SANJUAN

WAHKIAKUM

5 90

0 0.5 1 1.5 20.25Miles

30 0 30 60 90 12015Miles

LegendCounties of Washington State

King County

Washington State

The information included on this map has been compiled by King Countystaff from a variety of sources and is subject to change without notice. KingCounty makes no representations or warranties, express or implied, as to

accuracy, completeness, timeliness, or rights to the use of such information.King County shall not be liable for any general, special, indirect, incidental, or

consequential damages including, but not limited to, lost revenues or lostprofits resulting from the use or misuse of the information contained on thismap. Any sale of this map or information on this map is prohibited except by

written permission of King County. Peter Isaksen, Environmental Health GIS, November 21, 2007

Vashon and Maury Island Shorline SurveyInteragency Agreement C0700229

Puget Sound

LegendDOH East Passage Points

Quartermaster Harbor Priority 1 Sites



East Passage Priority 3 Sites

Streams

Streets

Parcels

Water