Eagle Plaza - Preliminary Drainage Report-combined Copy
Eagle Plaza Preliminary
Drainage Report
Prepared for
Urban Management, LLC.
November 2023
Eagle Plaza
Preliminary Drainage Report
Prepared for
Urban Management, LLC.
PO Box 7534
Olympial, WA 98507-7534
Prepared by
Parametrix
1019 39th Avenue SE, Suite 100
Puyallup, WA 98374
T. 253.604.6600 F. 1.855.542.6353
www.parametrix.com
November 2023 │ 217-7257-011
Citation
Parametrix. 2023. Eagle Plaza Preliminary Drainage Report.
Prepared for Urban Management, LLC. by Parametrix,
Puyallup, Washington. November 2023.
Eagle Plaza
Preliminary Drainage Report
Urban Management, LLC.
November 2023 │ 217-7257-011 i
Contents
1. Introduction ...................................................................................................................................... 4
2. Proposed Project Description ........................................................................................................... 4
2.1 Overview ....................................................................................................................................... 4
2.2 Permits ......................................................................................................................................... 4
2.3 Minimum Requirements .............................................................................................................. 5
2.3.1 Minimum Requirement No. 1 – Erosion & Sediment Control .................................... 5
2.3.2 Minimum Requirement No. 2 – Preservation of Natural Drainage Systems ............ 5
2.3.3 Minimum Requirement No. 3 – Source Control of Pollution ...................................... 5
2.3.4 Minimum Requirement No. 4 – Runoff Treatment BMPs .......................................... 5
2.3.5 Minimum Requirement No. 5 – Streambank Erosion Control ................................... 6
2.3.6 Minimum Requirement No. 6 – Wetlands ................................................................... 6
2.3.7 Minimum Requirement No. 7 – Water Quality Sensitive Areas ................................. 6
2.3.8 Minimum Requirement No. 8 – Off-site Analysis & Mitigation................................... 6
2.3.9 Minimum Requirement No. 9 – Basin Plan ................................................................. 6
2.3.10 Minimum Requirement No. 10 – Operations & Maintenance ................................... 7
2.3.11 Minimum Requirement No. 11 – Financial Liability ................................................... 7
2.4 Developed Site Hydrology ........................................................................................................... 7
2.4.1 On-Site Drainage Patterns ............................................................................................ 7
3. Existing Conditions ........................................................................................................................... 8
3.1 Existing Site Hydrology ................................................................................................................ 8
4. Infiltration Rates/Soils Reports........................................................................................................ 8
5. Downstream Analysis ....................................................................................................................... 9
6. Floodplain Analysis........................................................................................................................... 9
7. Aesthetic Considerations ................................................................................................................. 9
8. Facility Selection and Sizing ............................................................................................................. 9
9. Conveyance System ......................................................................................................................... 9
9.1 Existing Conveyance System Analysis ........................................................................................ 9
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Contents (Continued)
ii November 2023 │ 217-7257-011
10. Utilities .......................................................................................................................................... 10
11. Covenants, Dedications, Easements, agreements ....................................................................... 10
FIGURES
No table of figures entries found.
TABLES
Table 1. Operation and Maintenance Plan................................................................................................. 7
Table 2. Land Coverage Characteristics ..................................................................................................... 8
Table 3 – Existing Eagle Plaza Storm Conveyance System .................................................................... 10
APPENDICES
A Supplemental Figures
B Eagle Plaza As-Built Storm Drainage Report
C Construction Stormwater Pollution Prevention Plan
D Operations & Maintenance Legal Agreement
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Acronyms and Abbreviations
BMPs best management practices
CFS cubic feet per second
Ecology Washington State Department of Ecology
EPSC erosion prevention and sediment control
hrs hours
LF linear feet
LID low-impact development
MEP Maximum extent practicable
NPDES National Pollutant Discharges Elimination System
NPGIS Non-Pollution Generating Impervious Surface
NRCS National Resource Conservation Service
PGIS pollution generating impervious surfaces
ROW right-of-way
SF square feet
SWMMWW Stormwater Management Manual for Western Washington
SWPPP Stormwater Pollution Prevention Plan
TMDL Total Maximum Daily Loads
TSS total suspended solids
USDA United States Department of Agriculture
WRIA Water Resource Inventory Area
WWHM Western Washington Hydrology Model
YMC Yelm Municipal Code
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1. Introduction
This report is prepared for Urban Management, LLC to meet the requirements of a Large
Development drainage report as outlined in the City of Yelm Municipal Code (YMC) under Title 13,
Chapter 13.16 and Development Guidelines under Chapter 3.00.
This report addresses the type of project proposed, applicable minimum requirements, the site’s
existing and developed hydrology, the analysis of off-site drainage as a result of the project
completion, the stormwater facility selection and sizing, and the stormwater conveyance system
analysis and design as required by the City of Yelm.
2. Proposed Project Description
2.1 Overview
The Eagle Plaza Project (Project) proposes to develop a lot within a neighborhood commercial center
with a single-story building serving two restaurants and a single drive thru lane. Specifically, it is
located at the existing street address 937 Yelm Avenue, Parcel No. 45170000400 in Section 24,
Township 17N, Range 1E in Thurston County, Washington.
The commercial redevelopment will include 6,295 square feet of commercial space divided between
two store fronts. The redevelopment project area will be approximately 21,000 SF that includes
building:
A single story building
5 parking stalls including two accessible van stalls
Sidewalks and patio space around the entrances
A drive thru lane
The stormwater strategy is to utilize an existing infiltration trench that utilizes well-drained soils by
infiltrating around the site. The project will propose new roof drain connections and catch basin
inlets that connect into the site’s existing stormwater system to manage all new runoff on-site.
2.2 Permits
This project will require the following permits from the City of Yelm (City):
Building Permit
Right Of Way Use Permit
Land Use Permit
Sign Permit
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2.3 Minimum Requirements
The Project meets the definition of redevelopment per the Department of Ecology Stormwater
Management Manual for Western Washington (SWMMWW) since it proposes to add over 5,000 SF
impervious surface and construct commercial . As such, it must evaluate implementing the City’s
minimum requirements for Large Development projects.
2.3.1 Minimum Requirement No. 1 – Erosion & Sediment Control
Minimum Requirement #1 is that all projects shall address erosion and sediment control during site
construction activities. There are 14 elements that must be met to cover the general water quality
protection strategies of limiting site impacts, preventing erosion and sedimentation, and managing
activities and sources during the construction phase of a project.
1. Stabilization & Sediment Trapping
2. Delineate Clearing & Easement Limits
3. Protection of Adjacent Properties
4. Timing & Stabilization of Sediment
5. Cut & Fill Slopes
6. Controlling Off-Site Erosion
7. Stabilization of Temporary Conveyance
Channels & Outlets
8. Storm Drain Inlet Protection
9. Underground Utility Protection
10. Construction Access Routes
11. Removal of Temporary BMPs
12. Dewater Construction Sites
13. Control of Pollutants other than
Sediment on Construction Sites
14. Maintenance of BMPs
Compliance with the erosion and sediment control requirements shall be demonstrated through
implementation of an approved large parcel erosion and sediment control plan. See the Construction
Stormwater Pollution Prevention Plan in Appendix C and the Civil Plans for details.
2.3.2 Minimum Requirement No. 2 – Preservation of Natural
Drainage Systems
Minimum Requirement #2 is that natural drainage patterns shall be maintained and discharges from
the project site shall occur at the natural location to the maximum extent practicable (MEP).
For this project, there are no existing natural drainage systems applicable on-site.
2.3.3 Minimum Requirement No. 3 – Source Control of Pollution
Minimum Requirement #3 is that all known, available, and reasonable source control BMPs shall be
applied to all projects to prevent stormwater from coming in contact with pollutants on the
developed site. Unlike Core Requirement #1, this core requirement focuses on the post-development
condition of the site. Where applicable, source control BMPs will be selected, designed, and
maintained according to Volume IV of the 2019 Stormwater Management Manual for Western
Washington (SWMMWW).
2.3.4 Minimum Requirement No. 4 – Runoff Treatment BMPs
Minimum Requirement #4 is that runoff treatment shall be evaluated for development project sites
to reduce the water quality impacts of stormwater runoff from pollution-generating surfaces.
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Treatment BMPs designed to satisfy Minimum Requirement #4 will be selected – prioritizing on-site
infiltration - and designed with the process detailed in Volume V of the Manual and maintained with
the checklists in Appendix V-A of the Manual. Treatment BMPs are to be sized using either the water
quality design storm volume or the water quality design flow rate from the Western Washington
Hydrology Model (WWHM).
The Project proposes to construct less than 5,000 square feet of pollution generating hard surfaces.
As such, there are no treatment BMPs proposed.
2.3.5 Minimum Requirement No. 5 – Streambank Erosion Control
Minimum Requirement #5 requires projects that discharge stormwater directly or indirectly into
stream to provide flow control of stormwater discharges and infiltration to reduce the impacts of
stormwater runoff from impervious surfaces.
For this project there is no discharge to a stream.
2.3.6 Minimum Requirement No. 6 – Wetlands
Minimum Requirement #6 is that discharges to wetlands shall maintain the hydrologic conditions,
hydrophytic vegetation, and substrate characteristics necessary to support existing and designated
wetland uses and functions.
For this project there is no discharge to a wetland.
2.3.7 Minimum Requirement No. 7 – Water Quality Sensitive
Areas
Minimum Requirement #7 is that discharges to water quality sensitive areas may not be adequately
protected under typical minimum requirement standards and more stringent controls may be
necessary.
For this project there are no water quality sensitive areas within the project vicinity.
2.3.8 Minimum Requirement No. 8 – Off-site Analysis &
Mitigation
Minimum Requirement #8 is that all development projects shall conduct an analysis of off-site water
quality impacts resulting from the project and shall mitigate these impacts. The analysis shall extend
a minimum of one-fourth of a mile downstream from the project.
For this project there is off-site discharge from the property as a result of project completion.
2.3.9 Minimum Requirement No. 9 – Basin Plan
Minimum Requirement #9 is that adopted and implemented watershed-based basin plans may be
used to modify any or all of the minimum requirements; provided, that the level of protection for
surface or ground water achieved by the basin plan will equal or exceed that which would be
achieved by the minimum requirements in the absence of a basin plan.
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For this project there is a single drainage basin within the project limits. There are no known
watershed basin plans applicable to the project that would modify the minimum requirements.
2.3.10 Minimum Requirement No. 10 – Operations & Maintenance
Minimum Requirement #10 is that an operation and maintenance schedule shall be provided for all
proposed stormwater facilities and BMP and that the Owner shall be responsible identified
maintenance.
The proposed stormwater conveyance system located on private property will be the property
owner’s responsibility for their operation and maintenance. Common maintenance tasks for the
stormwater facilities are listed in Table 1.
Table 1. Operation and Maintenance Plan
Facility Frequency Maintenance
Conveyance
Systems
Annually and
major storm event
Use rodding to clear any root invasion.
Replace damaged pipes with dents or punctures that impact performances.
Remove vegetation that reduces free movement of water through pipes.
Flush pipe networks from cleanouts to clear debris.
Catch Basin Biannually and
major storm event
Dry sweep the parking lots and access drives at least every 6 months to
reduce accumulation of sediments and debris.
Clean and dispose of trapped sediments from sump at least every 6 months
and after major storms.
Dispose of any debris or accumulated sediment properly, according to federal,
state, and local jurisdictions.
An existing maintenance agreement is in place with the parent parcel. See Appendix D for details.
2.3.11 Minimum Requirement No. 11 – Financial Liability
Minimum Requirement #11 is that performance bonding or other appropriate financial instruments
shall be required for all projects to ensure compliance with these standards.
2.4 Developed Site Hydrology
The Project proposes to develop a lot within a neighborhood commercial center with a single-story
building serving two restaurants and a single drive thru lane. The commercial redevelopment will
include 6,295 square feet of commercial space divided between two store fronts. A sidewalk
extension will be constructed to connect to an existing sidewalk in the public right-of-way.
2.4.1 On-Site Drainage Patterns
The proposed project will build upon an undeveloped building pad within commercial center. Minimal
grading is anticipated as the Project is surrounded by a paved parking lot on three sides with flat
slopes averaging less than 2%. The proposed drive thru and resurfaced parking areas will generally
follow existing slopes towards the southwest with new catch basin inlets located at low points before
connecting into the existing stormwater conveyance system.
The stormwater strategy is to utilize an existing infiltration trench – that was sized accounting for
development of the subject property in its initial design – that utilizes well-drained soils by
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8 November 2023 │ 217-7257-011
infiltrating around the site. The project will propose new roof drain connections and catch basin
inlets that connect into the site’s existing stormwater system to manage all new runoff on-site.
Table 2. Land Coverage Characteristics
Cement Concrete
Sidewalks (NPGHS)
Building Roofs
(NPGHS)
Impervious Asphalt
Pavement (PGHS)
Landscaping (NPGPS)
Drainage Basin A (SF) 2,855 7,750 4,555 5,840
NPGPS (non-pollution-generating pervious surfaces) – landscaping and other soft surfaces not subject to a source of pollutants.
NPGHS (non-pollution-generating hard surfaces) – Roofs, sidewalks, or other hard surfaces not subject to a significant source of
pollutants.
PGHS (pollution-generating hard surfaces) – Hard surfaces considered to be a significant source of pollutants in stormwater runoff. Such
surfaces are subject to vehicular use, industrial activities, or storage of erodible material. Bike lanes, parking lots, driveways, and
unfenced fire lanes are all PGHS.
For additional detail, see the post-development basin figure and the site development drawings.
3. Existing Conditions
The existing site is a vacant lot within a commercial center. The lot is undeveloped with overgrown
grass covering majority of the property. Nearby land use includes surface parking lots, restaurants,
banks, and medical centers among other businesses along the corridor. There are existing utility
services and driveway connections stubbed to the parcel.
3.1 Existing Site Hydrology
The 0.32-acre site is 100% pervious with the grasses covering the property. The property is flat with
a general slope to the southwest. There are no existing drainage facilities within the property limits.
However, the commercial center has an existing storm conveyance system with inlets and roof drain
connections surrounding the subject parcel. An existing infiltration trench was installed during the
initial construction of the commercial center that included capacity for runoff from the property per
the as-built drawings and drainage report.
See the pre-development drainage basin figure for additional details. The as-built storm drainage
report is included in Appendix B for reference.
4. Infiltration Rates/Soils Reports
The soils surrounding the project site are defined as Spanaway gravelly sandy loam (110) series with
a hydrological soil group classification A by the USDA NRCS. A previous geotechnical report indicates
that the on-site soils have a design infiltration rate of 20 inches per hour following infiltration testing.
Further details are outlined in as-built storm drainage report in Appendix B.
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November 2023 │ 217-7257-011 9
5. Downstream Analysis
All stormwater runoff generated on-site will be conveyed into the existing commercial center’s storm
system. The storm system - conveyance and storage – were previously designed to include runoff
from the entire developed parcel.
Further details are found in as-built storm drainage report in Appendix B.
6. Floodplain Analysis
The project site is outside of a floodplain.
7. Aesthetic Considerations
The stormwater facilities are limited to catch basin inlets. Aesthetics are limited to the metallic
materials of these structures. The structures are flush with the finished ground surface. The architect
will dictate the design and aesthetic of the roof downspouts.
8. Facility Selection and Sizing
There are no new stormwater facilities proposed for the Project. An existing infiltration gallery will be
utilized to manage runoff generated from the new impervious surfaces built with the Project. The
infiltration gallery utilizes the high infiltration rates of the subgrade soils to manage runoff without
requiring any off-site discharges from the commercial center.
Further details are found in as-built storm drainage report in Appendix B.
9. Conveyance System
The project proposes installing a gutter system to collect and convey runoff generated from the
building’s rooftop through downspouts with a connection into the existing storm system through a
proposed connection into an existing catch basin with a drive aisle. Catch basin inlets will be
installed at low points within the drive thru lane with 12” PVC pipes conveying runoff into the existing
conveyance system.
The 6” PVC downspout connection storm pipe has a maximum flowrate capacity of 0.86 cfs sloped
at 2% minimum into the storm system. A 12” PVC pipe will convey runoff from the rooftop and from
proposed catch basin inlets into the existing conveyance system. An estimated discharge flowrate of
0.25 cfs for the 25-year event can be managed by a 12” pipe with a minimum slope of 0.50% with
excess capacity.
9.1 Existing Conveyance System Analysis
The existing conveyance system from outlet into the existing infiltration gallery has the following
drainage characteristics:
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Table 3 – Existing Eagle Plaza Storm Conveyance System
Outlet Pipe Upstream
Structure ID
Downstream
Structure ID Length (LF) Slope (%) Flow capacity
(CFS)
Capacity
Check (Y/N)
12” PVC CB15 CB12 12” PVC 3.74 7.48 Y
12” PVC CB12 CB8 12” PVC 2.24 5.79 Y
12” PVC CB8 CB5 12” PVC 1.07 4.00 Y
12” PVC CB5 CB6 12” PVC 0.50 2.74 Y
12” PVC CB6 Infiltration
Gallery 12” PVC 0.50 2.74 Y
The estimated post-development 25-year discharge rate from the Project site is 0.25 CFS, which all
of the immediately surrounding storm structures and pipes have sufficient capacity to convey into
the infiltration gallery.
10. Utilities
The project site is serviced by existing water service stub by an existing water main looped
throughout the commercial center, a STEP tank and sewer service lateral are stubbed to the parcel,
and franchise utilities are available to the property.
New connections to the proposed building are placed strategically to limit the length of the
connection to the existing mains, and there will not be any proposed overlapping utilities to minimize
vertical and horizontal conflicts.
11. Covenants, Dedications, Easements,
agreements
There are no known covenants, dedications, or easements on the parcel. An existing operations and
maintenance agreement is place for the Eagle Plaza commercial center’s stormwater facilities. As a
result, no additional easements or tracts will be required for stormwater management.
See Appendix D for details.
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November 2023 │ 217-7257-011 11
Appendix A
Supplemental Figures
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12 November 2023 │ 217-7257-011
Appendix B
Eagle Plaza As-Built
Storm Drainage Report
Eagle Plaza
Yelm f Wathingtor
Storm Drainage Report
Revised May 14.r 2009
SHEA
CARRJEWELLlr#c.
-EacELL Piga
STORM DRAINAGE REPORT
Eagle Plaza Commercial bevel o pme nt
Yelmr Washington
Devised May 14, 2009
Project InFormatr"
Prc4ect;
Pmpa red for:
Contact:
Project Engineer
Eagle Plaza
Ritter holding Company
Scott Ricker
( 360) 292-74320 Ext. 121
Preps red by! Shear Carr.& ]ewwellr Inc_
2102 Carnage Drive Bldg. H
Olympla, WA 9850.�
Phorpe; (MG) 35Z-1465
Contact: Jarnes E. q�ibwn, PI.
PrcjL"Ct Manager
Project Number: 94{D_01
E2KjIL2 Plezei
CLRTIFICAI Qr kK9LMM
PROJECT ENGINEER §_qERTIFCATaO N. i hereby ce rtify [Bath b Dir,�i inege Report
for Oi Eagle Plaza DeY6o>pentin Yelm. mas\ ton. has been prepgimd by me or
under m¥ wpervision -and mBem the minimum standards or the 1992 oepactmen! of
Ecology Stocmwat r Management Manual \-r the Pugak Sound Bm!5-i ri and normal
Findar s or engineering pr ctIo2. I Und-s3rd nd th-at the juMLdi dkn do -es not and
will not 89&2ne Ii -ability (Gr the Sufficiency, wita\lity, or per t rmance -or drainage
farifitie5 designed t�y m
$2tARa
t , �A
$
, �ffAL
Prepared byJames E Gibson, P,E. -- --
Eaule P afa
'FABLE OF CONTENTS
1. STORM DRAINAGE REPORT ............................ 1
FLIEL TANKS ... .,.,....,..,_,...._._r-...................... ,.,..., 4
r..,.,,....
1.1
PROPOSED PRO) ECT DESCRIPTION .......................... 1
Ari ALYSIS OF 100 YEAR FLOOD ................................... 4
I.S.
1-2
EXISTING CONDITIONS....,..,.,..,_,..,
DOWNSMEAM ANALYSIS ,....,............,-,-.,-,,.,.,..,.,..,- 4
,.,,,,...,,..., 3
1.3
INFILTRATION PATESISCILS REPORT........,....,. 3
PROPERTY OWN ERrS ASSOCIATION .,........ ..................................... 4
,,.,....,..,.......
1.4
WELLS AND SEPTIC SYSi`EM5
.......................................... - ,..,..,. 3
1.5
FLIEL TANKS ... .,.,....,..,_,...._._r-...................... ,.,..., 4
1.6
SUB -BASIN DESCRIPTION ........................................... ,.,.,..,.,., 4
1.7
Ari ALYSIS OF 100 YEAR FLOOD ................................... 4
I.S.
AESTHETIC CONSIDERATIONS FOR FACILMES................ :.........,..,.,.,.., 4
1.9
DOWNSMEAM ANALYSIS ,....,............,-,-.,-,,.,.,..,.,..,- 4
1,10
COVENAHTSr DEDICATIONS, EASEMENTS ............................................ 4
1.11
PROPERTY OWN ERrS ASSOCIATION .,........ ..................................... 4
z. EROSION CONTROL REPORT ............................................... 5
c.1
CONSTRUCTION SEQUENCE AND PROCEDURE .,...r,_._....,....,.,....,
2.2.
TRAPPING SEI��t�'I�f�T,..,. 5
2.3
PERMAPIENT EROSION! CONTROL AND 5TTE RESTORATION _.._._.._._._.,.,..., 6
2A
GEOTECHNICAL ANALYSIS AND REPORT ............. ...,__.._.__._...._.__, ,,...,..., 6
2,3
INSPECTION SEQUENCE ........,....,....,.,,,..,,...,..._.._.._._.__.., , ..,..., 6
�-6
CONTROL OF POLLUTANTS OWN -ER THAN SEDIMENTS ............................ 6
3. MAINTENANCE PLAN .................... __. _. _............ ...'7
3_1 REQUIRED MA174TENANCE ...................
Append i0OS
Appendix A-1 - Drainage Ca Iculatif)ns
APPcrldix A-2 - Drain aQe Sel!sin Map arkd Gra dInq Sad Drainage Plans
Appendix A-3 - Vicinity M-ap
Appendix A-4 - FEMA M- ap
Ap pen d Ix A-5 - Soils Re poi a oad SCS Soils flap
Ap pen d ix A-E - Aq uaSwi rl Data
Appen d Ix A-7 - Geotechnical Eaal ua I Ion and I of i I kratGo n Test
Appen dlix A-8 - 0 raft Maintanen ce Ag ree-hent
:- :d,s Vlct-�
.STORM DRAINAGE REPORT
Thi format of this report Fallows the OuMne provided In this arainage assign and
Erosion Control Ma n ual (a DE -CM) for Thu rston County, 1994 Edition -�j nd rn eets the
ragLtirernents of the 1992 De:pinrtment of Geology Stcrmwater Mnagem-e17L Mal -Mal
for the Puget Sound Baskn,
1.1 PROP051ED PRG3ECT DESCUPTION
Project Proponent! Rater Hol&ng Company
2EI40 Crites St SVW
TUr"%"terr WA 98512
360) 956-3960
ParcoE Nurnber: 217241�050G, 2172413060Dr arlld
21724130602
Legal Description: SeGWA 24 TawnEhip 17 Rams 1E Quarter SW
NE CCM S LN SR!510 208.5E NVV LY FRCkM x
WSOLBERG a S7 AE)J) SWLY AT RT ANG
570.1-aF NiNLY KARL T4 RV6r MFT RELY
570.13F SELY 220F; EXC RTC FOR SR,5?-0
PER
Semon 24 Township 17 Range IE QuarleF SVIJ
NE 8 LA -a601 TR 8 Document 004ftl; �xc
pTN FOR RCYVV PER AFLJ: 331.
Sedlon 34 Tbhynn yip 17 Rgnge 11= Quarter
HE BL -A-8601 TR A U,6Wment 00I�F; EXC
RTN FOR FLOW PER AFN:3!922330
Total Site Area: 5,38 acres
ZonLd:
Si,M Ad -dress;
ip"Ct Iver%riew,
C-1
9019, 911, and 917 Y4!Im Ave, W
Th* iia Vlara Development site is located lin Yelm, Washington and is bordered -on
the north by Yelm Ave. (SR 510); cn the south by vacant Jj rnd- on the east #by
T,�hbrna 6Ivd,, an on the west by existing regidii�ntial properties, Access is proposed
on both Ye I ire Ave. and Tahoms E1ad _
The proposed nstru-Ction i!5 office and retail building with as5ociawd parking.
Currently+, tiles &r -e 4 tmiIdings proposed with the folko Ong Square footages:
-5hea, Carr & lew-% Fri.
May 2009 %gr I;
Ea9 �e RTa2a
Building
Buil&P9
Buddi ng
Buddi ng
A 10'.9151 Square feet
B 14,750 square feet
C 7,075 s are Feet
D ioao square feet (2
f100M - M000 00 sf r floor)
The site area is la rgely undeveloped and is covamd by -grass. shrubs, some tree,
and a few small exi.Eting:strucWreG that will be removed. The pmpased conistnuctiun
gill add approximately 4-78 acres of Impervious area and will diriturh an addPtlorraE
0,60 acres forr-a total 0 evelopment area of approximately 5,38 jmcr-es. A lame portion
of the predeaeloped area cwrmntly surface drains to the exlstlrli� T-ahoma Terra
stormwate r gallery s tern, This project will eliminate raost of thi 5 drainage fro rn
being ❑anveyed to this system.
The devel opm-arit will consist of one d ra i rkge 4nirii (see appendix Nr drainage besin
map)_ TINS bal5in will be comprised of the following arms:
De-veigvment Coverage umrre ry+;
$vilding Roof Area 50,785 sf{
Parking and Sidewalk Ar" 157,412 sI°
OlsturbMad Perwieus Area 26 iib sf
Total Area 234 r3 �4 sF (5.38 acres)
*The roof drainag-P of 4 of the building -s Mil bc�, -directed to the on -sate Iii hi-tratian
gallery syFtem-
S'�nrmwater Treatment:
The roof runoff will be collected and cohvAyO d i rertly to the stormwate r starag e.
facility- Thi r&a reg the sIzI ng calculations for t r"t rnent were based on a total aria of
5.: 8 acres: 1-19 acres of roof areas, 3-59 4-rms f?f pavklfig and sideralks and 0.60
a{res i)F disturbed pervious arta.
Ac -Cording to Sectlorr -2.8 bf thf� DQE Manual, the raquired starmwater treatment
Flows is oornputed bated orw the 6 MorFth storm flow. The 6 month r�-tqrrn is cDmWted
-as 64 of the 2 year storm. According to the isopluvied mases in Appendix All LI -1.1
of the DOE Atbrrnw�iter manual, the Yelm area has e 2 Year storm of � inches
therefore of 2 inches is 1,28 Ifiches. StbrMShed software was used to compute
the 6 -month event stormwater flaw, This flow was found to be 1. 06 Cfs. set
-a ppend Ices for :5torm:5b ed model output showlnq th Is calcu lated flow,
Stormw,;iter treatment will itte provided IlYy ori AquaSwirl Model AS -5 S'tormwater
Treatment System, This nnodel will treat ay water qualkty flow of up to 4.4 cFSS T;hIS
will provide arnple treatment for the entire site. In additicnr the 100 year storm far
the treatment area was Computed bD 4e 4.63 cfs (see Stormshed out]3ut in
a ppend Ices)
ShrFr C
Jr.-& fflX IfhC-
may 2009Page 2
Eagle Plaza
Tile ALqua5wirl AS -5 has b n desrgned tO treat 4,4 , In addlticia tlhe AqujiSwirl
will [orlvw the 100 year flow of 4.63 06 without the need of a j3ypass. SL�a
appendices for further information on the Aqua'$wirl system.
St-ormwatter Storages;
Stormwater vriII The conveyed frbrrl the AquaSwiri treatment syrtern to an infiltration
gallery locatad Under the parking area, Tie gallery has been sized to accommodate
the 100 year Storm event per thE� requirements of Section IFI -3.f .5 of tha DOE
stormwabar rn-anual, In addition, per thLs section, it must be demonstrated that the
required volume for the 1Q year storm -can be recovered in Z4 hoax; eiid the loo
y4wr storm in 48 hates_ Accord I ng to the isopluvlar maps i n Appendix AIII-1.1 of the
DOE swrnnwater manual, the Yelrn area his a 11) year Stones OF 3 irkches and a 100
Y -Em r !corm of 4 inehQs_
Roof runoff front all the buildings will be oonvoyad directly to the infi Itratio r< gallery_
Therefore, sizing calculations were based on in total site arses of 5-38 acres
StormShed software was used to model and size the InfiltraLiu n gallery, FArthe
recorn rnendetions of the 0 Wtechn Ica I I nvestigation (see a ppend i{ }, a n irlfi Itration
rate of 20 inches per Hour was used for dpsiUn- In SL%ormShed, infiltration jr,
,modeled as a rating curve, A steady rate of flow of 2.W cfs was computed bated on
the bottom airea of the Uall ery (.see calculations In appendrces ). Iyer the modet, -a
totah volume of 4,J306 cubic feet is required to provide storage for the 100 year storm
(9q2a model output in appendices), The Irkfiltration gallery wiII be 50 Feet wldar 90
Beet rang, and 4 feet deep and will provide a total useable volume of 5Fg4Q cubic
Feet. Sea appendices for mod -2I %vtput and calcul-ations.
The infiltration gallery was ch eek.2d age i rtst the drat -rd own requirements for bQth7 the
10 year a nd 100 year storms. Th ft volumes for both 6F these storms a rea ava Mable
i r a fraction of to a ti rn e requ I red ( see a Rpen d ices for i;ornputations) ,
1:2 EX1STTNG COM)iC ONS
The project area is largely vacant with some existing structures wkth wo�0etative
caves irm;luding grass, shrubs, and trees. 51ope5 vary from flat to steep_ The
majority of the site has 5Iopes ranging from about 2-3 , The south area of tl��
Site, lomeverr has Steeper slope areas with an average slopes of aW rt 12 with the
Steepest slope at about 28%i All drainage is generally to the south,
1,3 3NFZLTRA-fION RATES/SOILS REPORT
The Soil Conmrvatiort Service (SCS) Soil Siurvey of Thurston County classifies ori-sit12
soils es Span way (110) series -
Solt testing urm performed on,:5ite to establish th o 8xpe d intiltration rates of thtie
soils, According to this sport, on-slte sol Is have infiltration rates of 20 1nChos pur
hour_ dee appendix for art -site in litration report -
1.4 WlELL5 AND SEMC SYSTEMS
The site has one ex«ting septic Syst!m for the existlwi-g house CS17 Yel m AvL- Wd .
This system will bm decommissioned as; mquired by the City of Yelrrt and Thurston
County Sa riita ry Cx)des.
Shea, cafr im A �Jy' P1c_
+may 29 age
Eagle Plaza
Propos-ed b u i Id ing-9 wi II t�e con riected tp City of Yelrn Ovate r Wd mmwer uti I Itros_
1.5 FUEL TArgKS
No fuel to ruts are known to be on-site. A regi ffw df the DepartmeTi# of .Ecar Y':5
Lea k i ng Under+grou nd Starag 0 Ta nks (LUST) I in did not ind i-ta to arty exIsti ng or
ab, ndcmed fiiO tanks on the prgj ect slte.
1,6 SUE -BASIN DESCRIPTION
The project area is part of the MliscleaIly River watershed. �>kormwater from this
development is contained on-site.
There is no off-site drajna!�e trlbutarV to this site.
1.7 ANALYSIS OF 100 YEAR FLOOD
7hir;, project has not heeds identified as a 100 -Year Flood hazard arca. A FEMA PERM
Map i5 included In the append ire5_
fit$, AESTHETIC NSIDF15,I#T10145 PIER FADILMES
All dl urb-a-tl perviqus area will hm2 vegetated a0d laa)dsCaped_ A9f storrinwater
facilities will he underground and will nQt require landscape_
1.S DOWNSTREAM ANALYSIS
Alt storFliwa er generated wl11 bi�! starc-ri -arkd irnfaltrated on-site. AEI :retention facilities
h -ave been designed to r0ain and infiltrate t�rC 100 -year storm event' Therefore
downstream 1`861itke$,viF1 not be affected by this proj@,ct.
1.10 COVENANTS, DEDICATIONS, EASEMENTS
On-site drainage fadlitles will require routine mwnteinanre. A draft maintenarKe
agreement between the owner and City i:5 attached in thle a ppend i i:E-5 that will al liow
the City to A{C2SS the far d lues . The owner is msponsible 'f br perrQrmi ng regular
Maintenance of the storm drainage facilities.
1.11 PROPERTY OWNER'S ASSOCIATION
The entire pard i5 currendy under a single ownership and will not require ars
assoCiatign_ If the crwrrershlT)-of parcels is transferred, all a�saci,tign will be formed
1:1) address matntenarice of joint facilities.
5hevr Go -A �ewtien, lrrc.
My 2009 p�� 4
EA�J�C` p12+�;i
2. EROSION CONTROL REPORT
2, L CONSTRUCTION SEQ U ENCE E AND PROCEDURE
Tho Proposed commeml-al d1nVNQpment wlli imrode site grading and eru5ian control
measures rierigfled to cOntAin silk and soil within the project bo-undarles during
tarkstnu.k[on untll perril-hner1t fetation and site Improvements are in plate.
Erosion/sedimentation ontrol shall he achieved l5V -a cumbiftation OF
stnrcturat/+rii�getiatiye ouver measurez and -construction practices tailored to fit the
sdte.
t Management Practices (BMP's) will be em -played to properly clear and grade the
site a-nd to SCh2dUIC cornstruction activities, before any construction begins orksiter
erosion control fatilitie5 shall first be installed. The planned construction sequence is
Follows,
1. Schedule pre•construrtipn confermciab voith the City, contractarr pralLrt
engime r and COnStru-ctien staking surveyor,
2. install rock -construction entrance. Llse 4" to 8" diarnet2r quarry Spalls with
12' mdinimu m depth.
3. Install filter fa brGc fencing in the locations shcwri on the planr.
4. I"Tuvide inlet protection around existing catch bass mi-
S . Clear site (gnlbbing and roup h grading).
6. Ma i rrkai a equipment a,td wate-r Su ppky for d ust control,
7, Daskjnate an area for wa$hiing Goncri�M trucks to control the runoff and
eliminate entry In the r3torm drainage system,
B. in5tail underground utilities,
9. Pmvicle Inlet pratecticn around all new Gatch basins=
I0, Maintain aEI er:i iQri mritrol facilites until the anure site is :5kabiliz-cd and silk
runoff ceases.
2,2. T3tAPnN6 SEDIMENT
Filter Mbricfencing will be insteHed to trap sodlmernt before runoff exits thn site. in
addiri❑ni- inlet protection W1II be installed around all existing and new catch bosuns m
filter out sediment befar4 runoff enters th-9 storm, system,
A stabillzed m struction entrance will be. instalW to prevent construction veliitl4r;
frim tracking loll onto roadways. If sedirmmi: is tracked off-slter It shall bl� twit or
.shoveled ft�cim paved wrtaces on a daily baSiSr -5o d�at It Is not washed onto existing
catch basin or other :5torrn dralnagq� facilikies.
Shur Ca reg & A"k Inc.
Ate' 2009 Pr, 5
Eaglq Plaza
During the rainy S-2asan fryrn Mvernber 1 thr6v!�h March 31, the -cantractor rn 1 fat
cover any disturbed areas rgreaf!r than 5,000 .5€ an size If they will be taalfworked for
more than 12 hou r5- Nu I ch, Sod ding r or pl-hsti r, oo-rerl ng Shall be ►,sed to pre n t
anion in these a-rea$.
2-3 P ERMAN ENT EROSION CONTROL AND SITE RfETGRATI DN
ALII disturbed areas will tre paved with asphalt) &Ni2red with truiIdiogs, or landscaped
wi th g rasa, shru bbery, or trees per the I andscaping plans,
2.4 GEGTKHNICAL ANALYSIS ANO REPORT
Mone of the storm d rai nage facillues alre I opted riHMr the top of a steep sI ope-
ThereFpre a geot&,chnical arlalYSis For slope -or soil stability was necessaty,
2.5 i N SPECTION 5E 1 E NCE
In additron to req ui red City, I nspecti-orks, the project engineer wi I I i aspect favi Iikies
rebated tea ston„waker treatrrkent, F-raslon control, Stora -ye, and oo-nveya nee durlag
-construction. At a mi n Iron nn, tfie fol local nq items shall be i n5pected at the time
speripi4!d:
I- The; erosion control facilities stall be irtispeaed befcr-2 the start of searing and
grading to ensure the followtng Structures are irk place:
a, Construction Entrance
b, RIter F -a bric Fffnco
C. Inlet protection Of existing catch basins.
2. The conveyance systems will be inspected after carkstnaction of the facilities,
but before project completion to -ensure the fall&wing iterns art Irk working
order=
a- Pavement Drainage
I?- Catch Basins
C. Ccrnreyance PI ptng
3- The stermwater tmatment and steragi� sySterns shall bE inspected during and
after con5tructkan to en -sum:
A. The facility i5 constructed ha design sp@rclfiCioki�?ns and that. pmteotion
from sediments in pi acv.
4- The permartient site restoration rneasurEs tharl be inspected after land-scaping
Fs cornpleted.
A fl nal inspectlori snarl he perf-ormcnd to,ri?rify fIna I grades -5ettirgs Of Wntral
structrkr es and all necessary I nfdrrnation to corn plate khe Eng Ineffr's Canskructlon
Inspection Rieport Form, Th Is form rnust be complerted prior to NnaI pt,bllo works
construction approval.
2,6 CONTROL OF POLLUTAN TS OTM Eft TM4M SEDIMENTS
The corrtM&Gr will be required to designate -a washdown area for ❑Q,icretae tacks as
w e II -&s a temporary stockpile area for construction debrls. VehiaQ fueling, washing,
or m a i nterance sh a li occur in designated areas -only.
AGr.020D9 Page 6
Erg�e �la�
MAINTENANCE PLAN
3.1 REQkJ IRED MAINTENANCE
rhe fella ring pager- contain mainkenan-et nee& for m of the Qornparrent5 that are
Part Of the praNC .5 drainage syst]erri, a5 well as for wme compoftents tl the
project May nqt have. Thi checklist thould b-e� competed for all' s+ tern components
on the Foiiowfng saedufe;
M- Monthly from Nave rnber through April
A. Oe in I ate su m riser (preferp bEy September),
S, After any major $#orm a rlt (L15e 1" i -n 24 hours as a qui dellrie) itemr. rri-arked
"F>'R only.
Using photocopies aF these pa«g0f-, check off the problems irlvestigat-ed each time an
Irtisp�ttion was performed, ,odd c;omrneflts ars problems found and actions taken.
Keep these "Checlked" sheat in th-2 We$ as they will be used to rite an a rintia I report:
( due in My) - Some item d -u not meed to be looked at @v@rY item an inspection is
done- Use the suggq d frequency at the left of each Rem as a guidefirre For t -be
inspection.
The ju risdiction rna y be wiled for technical assii5ta ace. Please do not hesitate to tial rr
@sp0d*Ily if K Is unclear whether 0 partloul-nr 5ituatlon may be a probleirn-
&4—, Q— & Am!. -Y, 7nc.
Aprfi 2009 page '7
APPEN131X A-1 -
DRAINAGE CALCULATIONS
F*g.c 1 of 3
Appended -on. Tbu raday, April 09, 2M 9:03; 27 AM
LPO OLCO P ]TE [L-evtl Npoll SUMMARY using 11:u Is, 24 hr zStorin Event
Start -af live sloraac; 3 3 3 it
Event
Matelh C -Cis
PeAk efs
T ax De h ft
Voj VUi (acft
`me- to Em �v (hr)
U a�E
1.2151
2.08
=-2-W)
4$06.1541 0.1103
0.00 ;q
.Sunt m a ry Report of all DeteTki loo Pond Dal 91 1A #�- "$,
Projekct Pvc0ps
Fvent prx�i in)
6 motit.h 1 _�$
Peik T
(hrs
$.
100 ��ar
x,00
tL-,r
OLUpAA.M
O't F -y
H
i1ASLIST2
[ 100 Ymr Vm Devclopmcuf] �lsir g [TYPE 1 A.RACJ As 1100 dear] [24.0]
[100 Year Post Development] Using ['IYPE;1 A.RAC] As [100 year] [24,0]
USTF INT)
Basin [� E�+ mt
1 O yeaT Pre E t F10 Oq mIU e.nL
DealtQ
Ufa
l . l !
Peik T
(hrs
$.
leak W I
(ac -CF)
0.5#13
A reg
ac)
5.a8
Metti�d!l��ss
CsLypr'up'_
l�irit�pe
1 Year Foss
e10 rjsent
100
ear
4.6361
1
1.5247
_ $
scs
TYPPI A.R. c
11
BASLIST
1100 Year Pre Devel{)pment] [100 Yew Pi?st Dovoloprnmt]
LSTEND
Record Id: 100 Yea r P ve 13-evelop kn em
Design. Method SSS
lRni fatl type
A-kAC
LYd In ' 1 G.00
Fe91Ug Favt.r
F 494.00
Storm Duration 24.00 Im
A1wrae on I aeff
0.20
Pervious Area
5.39 ac
DCIA
� � 0.00 ac
l ervioua Cil 68.00 JDC
CN
0,0
l-eryiou5 TC =1 5.00 min
=Du '
0,00 ruin
:RkW *f;�Froj 40 TOBAW940.01 Yelrn Commercial Proputy� PhaSC 02- Final CiVil fk_ 4/91200'
Pervious CN Cali
11 erx uvn
SuibArea
ca
_
DiTt and Scmb 5.38 Be
Pervious Com siteld Chl}�?��' � 68,00
Pervii)w TC C'Hle
Descari iaa
Lin tb
$1
Coeff
mise
5.00 rmn
PffVious TC IF 5.00 Min
ISturm Duration
Record l d: 100 Yea r Posi Develop in ent
psi r n N1etholl�
Peak 0
5Cs
Rainfall 'I
IC-Ont ,arm a -c
T YP'E1 A, AC
H d Inn
7.56
10.00 min
Peaking Faaor
48A.(*
ISturm Duration
24.00 hrs JjAbscrAtfio.
C,.0 0,2.0
Per sous Aren
53 ac
D['[A
0.00a�
Pervioms CJS
94.65
JDC N
T.. �
O -W
eryi-ims TC
5.00 mi' -=n
DC C
0-00 min
Peru iipw CN Cale
Ucsrri i�i�
SuhAr b cin
BuildinR Arem
1.19 ac IF 98.00 -
Parking Loo a,Lt Sidewahs
5.59 a F 98.00
0.60 ac _ 6.00
Pervious AMC 2)
94.656
�_--
Pervious TC C&I-
f De3cri
mim IF
TT
Iseet
0- .� fo
5.0
in
5.00 rr iji
pt 4 iom TT'
5.00 min
IIYDL»T SUMMARY
(100 y0ar out]
ITEM!
fI d[D j
Peak 0
Peak T (h"
P-Rak Vol a
IC-Ont ,arm a -c
!00 ycar out
.08
7.56
i.524'7==38
IMnI-T R E = S c>t % 9 q J topq,#A.,,pt m J- 0 8 CPS
(171allerw storage]
LSTEND
fhie:�N:1PripjedsW940 T<3PA 0.01 Yclm Commemaj PropertyTha 02- Pi" Civil Dc�,,, -49 .009
Rt,eo rd 1d: Ga Ile ry Storage
�S�Ck �
Lldller�tilt � �lol urns
�
�, t � f�
Dcre uLi rEt
0.10 ft
333,00#1
?blx>EL5,0�]
ax EI,~
void ]patio
133.00
UO
_ 333-00
0,00
393.01.
--
0,00
_00
500.00
ZOO
q -00
3-00
135100.00
4_()+J
18000,00
50 r
22>00
stn a -Stomp Ty pe'ride
lel SCHLIST
(liYfilrrartion C'rullury T)ischarge]
USUNU
Record Id; Infiltrartion Gallery Discharge
Page 3 of 3
W F-Ty+%-"t�gl r . $-7. j
VLMa = 3 M
c7 b -f f -`f 1U -n-
I_ietnsud go: Shea, Carr & kwcl] Inc. U
FqP 9- 4f& L 4� +d itA-M,,A 4 .%
f 1L!:/fK--\PrOjftV,%OS40 TICPB A940.01 Yglra Comm ial PVThaw 02- Firma] Civil Do... 009
pe -k ri
I n iltr on OaIle k
Dcre uLi rEt
0.10 ft
Start X1,
_ 0.00 f
ax EI,~
33-1.00 ft
0.00 ��
UO
_ 333-00
0,00
393.01.
_ _
33 7M
c7 b -f f -`f 1U -n-
I_ietnsud go: Shea, Carr & kwcl] Inc. U
FqP 9- 4f& L 4� +d itA-M,,A 4 .%
f 1L!:/fK--\PrOjftV,%OS40 TICPB A940.01 Yglra Comm ial PVThaw 02- Firma] Civil Do... 009
NFILTRATION. TRENCH VOLUME
PROJECT-. L d e PI 't
PROIECT No.: 94 0.01 ..
�.�ti �;�;.;,�� .'rte'.•: �r ••-, •s, }:r` -•..f • . ;,•i .. .. .- ..•.
I nfillrat6n -Gallen Design -
50
—teetwlde
_ 9
teek Iona
4
4
feet tall
Total Volume Rawid-ed = 5,840 (A5srlrnes 33 0 vaid space in gallery rack)
For �(WmShed Input need the 1011vrring inFormatlor: Ama Toil Valumk!j�rf0tad p h
ESI gptipn
Aw
Volume
ikUztLU—m—rma!Y
4
148$
0
a
1
1485
14185
14$$
2
14$5
1485
297¢
3
948$
1485
4465
4
1485
1485
51W
-GALLERY INFILTRATION RATE
P ■O]BCI; ������ e : `
P R03FCT NO.: ' 940./
DATE: 4/1 • y \ /
Flow mA = m/d)A
k= infiltration rale (i@b)
i _ u nily
A= pond boomari�a(square %ej!
y= fWtaW,ehigh ground w*« elevallion
d= 3feel (minimum dslanG#bgroundwamA
nra eage ngw A hmbafi cn 06ery- 8�ze 59x§O%*
k =
O = 2 ne
21)
in?nr
A =
4.500
sf
Y=
a
fI
d=
±
H
Flow from +nkmton goIc>. Use for 2Ihk
canl.rolin Sk«mShed Model.
INFILTRATION GALLERY STORM SIZING
PROTECT N O. �}, 1
DATE. 4113/2009
Total Site Area:
Total I m fieraiou:5 Are$;
Total DiLgturl�ed Pervious Area
Intlltratlon Ratp,:
5.38 ac.
4.78 ac -
0 �'30 ac.
zo.00 it hr
�Dtc� I Required Pond volume = 4rZD6 Cf
(Required VoIume per Storrm et M Fling for 100 )eQa r StClrm a
Totail Volume Provided = Sr940 Cf
(See attach -ad shed; on IrOtratian Trervch)
A00 Year ' �kQx wduwn-- 100 YearY-oig from Storrn et.= 4.806 if
IfrFiltration Bottom Asea = 4.5 DO sf
VOIUWli�! = Area * Perc Rate 8 48 h 12 inGties perfoot
Vblume _ 360,000 tf{4$ hours > 4.806 If
In riIkration facility w I I I have the Gapac ity to I nfl Itrate t h e Vo n d voiLl mie ill 4B hours -
10 Ye,�if StQrm DrayydaWn L 1!0 Year VOI a me front Sto rrn FJ
_2t = i ,1 } ff
Infiltration, Bottom Area = 4,500
Vol urne = Area* P2rc Rate * 24 hrs/ 12 i nc' [IL�: per foot
Vol ur a = X 80.000 Cf/24 hour$ > 1,167 (;f
InfiltraClon facility will have the capacity to irifiltraki� %he pore volume in 24 tlDurs.
APPENDIX A -3-
a RAZ N AGE BAFFIN MAP' AND -GRADING AN D DRAINAGE PEAKS
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APPENDIX A-3 -
VICINITY MAR
23
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See Map 35
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APPENDIX A-4 -
FEMA MAP
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APPENDIX A-5 —
SOILS REPORT and SCS '301 L$ MAP
: ��Y` �•�' �_ �� � til � ,
• � �+' �'�"#• �k � may.}�
CJWM
}r+ • -•} � - -} X11
At—
��ss��ss �•
-K
. � it �• _L� �{�� _' ••'.� _ � _
• y��•":��t,�, -ty_ri��:��•f � �.l � .tom _ frL1� _ . J.
••:-ref-' '+, -��.'' _ _ 'S. :'�:
.=�•r � µms• �;.�. _ sT .
y ; r•
a h•
'.•C .'• ••,K N' rr'
: r _ t .�•: - • 3y- ter` �.x. _ ,
90
-Sprinklers Can be used, taut ar sly application rale I�
rreeded L(3 minimiZO runoff. The amount of woiter applied
should be Surff-icieriit tD wet the rout zone biA srnell
-ainough lo mirrirnIZe the Ii!�$ching of plant nuarierrLS, The
application raffle should Oe sdjiwted to the avaklable
waWj caparAy, the water intak(� rate, and the hmdlo- of
the crop. Animal manure carr be applied pariodi;cglly
IJUTirlg the gTOwin!� seasan- Areas shat receive heavy
appliogons St7oLrld be harrowed .01 iea$t Circe Ej year-
ThiS r}nil iS well suited i0 hoines11ia5. Pel'b4az end
cobbler} sriould be removed. perti---ularfy+ in areas used
fcr lawns. I•n 5LEmmer, irTigalicpn is need&d for lawn
grasses, thrub5, virmes, Shade treses, and ornam-2rT1a1
1TeGS. Mulch, ieritlizer, and ir+rigartion aT-9 n&eded to
establ'15h lawn graGS@S and other small -seeded planks -
Y he Tnain limitation 5flecLing sepiic turas absr}rption
iiald5 �5 a pDpr tikiqYtirug GapaCitY. li ahs den4ity Of
h4nv!E�irrg i& mMorako or high, rrcrnrnunit; :59 wage
!tystem5 are ngwJed to pravem vhe Conlarninalson OT
water supplies caused by sei p&gs from OnSile 5,w&O-0
disp.nsal systems. Grilbai*5 are not sfable and ere
subject to slaugFlir,g.
1}DuglaB-liT i6 the main wandlan6 specing On ihis unit.
Among file trees of limiW6 extr*rrt are Or-2-jon white oak,
IC)dgrepele pine, axed red atider. DougW-fir arLO $co{&h
pi-ne are grown an Ch9i51m@s tree 0,21MWiaris. On the
basis of a 1 DG-yaat rile curve, the m -Ran ahe iru�ex for
1?aUg1$5-I�r ;5 140. On the bass 5 of a 50,yeaT Bike Wrve-
R is 1 D$. the highas1 Fiv-erage grc wth rale. of an
uornana0ed, eaen-aged stand of Uouglasdir as 14$
cUbLo leek per acTLb per Year at $5 years of age.
This sail is :suibW IC yeawound 1[rpglnq. U n:suirlari:60
riA6s artid skid WMIS are slippery wirefl w+ei. Loggias
roads require suitaNe suTfacIr.� material far year-rflvrA
usg. Rounded pebbles and Cob'b'les fOr read
c,ansiruG10iS Br -2 readiLY auililabie an vNs unit.
DistuabanCe of Rha praieCtiv-0 layer of IJVfi van b -e
rninimized by the carefuL use pi wheeled and tracked
Seedl-ing esta!oIifhr:rent and seedling mvM&Ikly $n� 1!ne
msirl conot!,rns in th-P produClion of iirnber.-R&Oresta 5n
C ri �� a oCrrrpl 5tred W planikng Dpuglals-fir -seedlings.
It the gland inCkU4es SeeO 9T"S, natUr&l tefgFeWation by
Qguglas-Iia_ Oregon WHte oak, and 106gepple pine
occurs periodically in Cukover ares. Drorajpliness in they
surlji,ce layer reduces the 5q�g,dt'rrwq suirvivel rat$. Wrian
Openings are made an the carMopy, invadwrug hrushY
pl.pts cQn ds1;ay the cLstablishmenl -al -pmled fouglaS-
fir Seedlir.
Comm" for.E51 unberstory plants are Cascade
Qr.Ag0n-gaps. salol, western bTaoke0lerrL, Waskarin
r,wordfern, lrs,dlen plum, Qrrd Sc h -broom.
Oil SUr
TVLi3 maP Unit i:5 in C2pabtii1V SLJ bol ass IVs.
11 1—Spanriwa+ grayeily sandv loam. 3 to 15
popco rt slope. This very dieep. EDmewhat excel
dr.ained soil 03 on 1erraqe5. 11 farmed in glai;ial ou!ty
and ualca-nLe ash_ The naftve vegetalion is mainly
grasses, ierrks, and -a iew oinffai-6. Elavatiorr Is 7-01
406 feel. LTM -0 average annual ppecipllatlon is 45 tc
Inche!51 Lhia a"ia[e annual air lernperaturS iS BbV
degrees F, and tree gveraga- tram-iree psriod le 1-5
204 daym.
Typical ly. iihe surfam layer I!a. black 1)rarti+elly sur
I0em 2boul 1 Ej inclin thick_ The aubsoil is darts
velfo'wish brown ve►+} gravelly sandt loam 0130W 5
it nhas Ihigk. Thu %IbElralum t -P a dep1b of K iml
moT@: Is dark y,@ljowistj br-own uxlr eiy+ grtav9ftyr S
IrL�Llud- 6 In loris unit are small areua Qf Alderwo
soils on ti11 plains a0d EverE�11, lnol;E ncla, and Wisp
s,oiMs ort teriraoes. Also included -are small areea G
Spanaway 5oits khijki h;ffwe a Stony sandy Iowm sun
I.@yer aril smeb11 areas -a1 �paDaway gr-avelly e'nd
mat have slopes of 0 to 9 percent. lndu&d ar'M'
up about 20 iparceM cf the tolarl aGrea9e,
Permeabil ityt is moderately rapid in the suhSbil
anawaV 5pi1 and very rapid In the tubstrMuM.
Available waler capacily is low_ Efteriivi� r'votin-g
is 60 inches or more_ Runoff is saw, aW the hQz
water er-ar.Ol 15 Slight,
Thir. unit is usad mainly a5 haylend or pasture
site for horiie5. or as a 5quroe cff gravel. 11 is alst
as rwDodlIand_
The main 9imilallen ffgic ir�g hair and pasture
low availabLe -water rapa,ciLy during The ST*Hir'g
groper Tavng pravtrces. vu'0011 cwtrol, and ierC
r*eded to ensu r -e maximum -Quedilyr rat f0ra0. F:t
grazing helps 10 magntaiin the quality' 4Df fVrage. F
mowing beips to mainlairi uniii;vrm. gre h, dISM
selective gr ins, and controls Ytt$d:5• Aro mal nm
can be applied perlodicailyr during the Browing 6
Ares khat recei-e fieavy applicaliorrs should be
narrDwed $1 IeW once a year. In Summer, irrig=
rteede-d for max itYMUm production ci rn¢et ioraRG
SprinhsleT rrrigalia:n iq khe beet Fnall Dd i f $pplyiMT
The amoLjrrk VI water applired should bt SUME461'
the tubi zone tell X11 enough #o minimize the
15f plank nivtrienls_
rr
This onirt L5 suited to nQm6siles- 'C1ti main I i
Is lho S4o0e. Cutbanks. @re rlot stable and $Te $1
151u q'hiry�- A p4jarn e'er cEM be 4S' UbIjShed ani
maintained Ihrough proper ferlili2lingL geediirkg. r
and shaping of the dopes. Pebbles and Cobble
be removed, parliculially in are" Llsed f4w lura
'hUrelon County. washingtan
'eluded ares make up ab -oval 1 D Mrcen1 of 1hL�, jQlal
aCiOaga.
Pereneabilhy Is m�iderateay rapid in din! $pen$ soil.
.wail -able water capacily i5 modaraje. 811EMliwe 1`o0lrn!�
wepth is 20 [a 4-0 inchak�. A seasonal high water tale p.5
a[ a deplih 01 abcwl 12 10 36 inorie�s Prom NowE§mber lb
pril. R-UnG11 is slow. and the hazard of walur er-osion it
. Jight,
Most a r-Eae are Lised as hayl8 nd and pasture. TN ,
'1q is suited 10 hay an -d Pasiuffi- The grain IiFnilatior,5
;13 the seasoul high watat latae and the mOcfeFat-e
'available waler P-Qpacily. Propiar slocking rakes- pa!5jikre
rrAa2ion, and rP&iricied grazing clurirle wet pl#ri�ode heap
keep I:he pasture in 9Md Condiltlon and protect the
,ia from -RFosdOn. Rvlallon grazing hMp[z to rM;aknlj�in the
-quality of forage. Periodlc mowing Helps to mairilain
liform grawtrr. rriscourag@�,s selective grazing- Arid
5nlrols weecis. In Fr:i:V years irri�aqiory is needed For
maximum pmduction. 5pri-nk1ftr irrigetloo is the besd
—eihod of applying wazer. Thig amourd DF water applied
iauld be sufficient 10 Wei the rml zona Lal Small
enough 10 minimiwe the le -aching of plant nUiriangs,
A clew arta$ We used a;5 wDodaarld. On lite lip!3is of a
)O -year rile cume. the estimated rile i;5d-ex for
ouglas-fir is 144. On the ba,8ir, cd a 50 -year Site ours&,
t is 1 TO. The -Aslimated �rgwlh rely of an Linmann-sed.
,An -a -ped Stand of Douglas -lir Is 150 eUbiC f-EeL per
~re per gear a[ $D years Of age.
TT1q mein Iimilation allticiing the hj��estir:g of tirnber
she muddiness useC by "asoni§l we less. Use of
reeled end lrainked egejiprAenT when [he soil is wet
vVrlls iri Futs arrd soil compaction. Uniturf d reed$
5M skid Erails era soft and can t)e impassably when
3l. Lc�ggiN rods Te-quiM sui�abl& :suriecing majeria I
ryear•round use. Ro nd-ad p6bbiMs end Gobb2es for
BEd CWistr"Non are readily avail&bie Qn this unit, The
',atonal high wa[er 1,BbIE§ limits the use cf pguipmeill to
Y periods. Dis[uibancp eil the prolWive rayer Df dLrff
'an be minirr,jzed by Lho careful ute Uf vebL! rua arca
raked a Lripme+ll.
Seedlifig -PalatAG:hment is 1N5 mall} CDncern rn the
nduclion of [imbgt. fie10r@$1ation can be
3ccmPhshed by planting D01gra:B-f it seedlings- 11 the
3hd inclode&5 sel}d trees, nigturai 1`#10resJadw by r"
Jar ccckars periodii�a1?y in cutpv.UF areas. The zea5oml
11$h w.Bker tabu# inhiblis root re5prratiDn and Mus results
F -S9" 30@dlMg mordalily. When openings are rude is
a SnoAyr inva, ng brushy plan Ls can prevent 1:1e
-!0lishmen1 OF p1antM aougr lir seedlirk9:5.
.' rn'�h4n forest tMilerMory planta ark cascado
n,grape, salol, Mine m$plg, western, brackenfern,
? Egon while 0$k.
This map unit i5 in capability suhoiaS� 1JIw.
110-5 pamP way grSV011yr !Jndy barn, 0 to ;3
pecten[ Slbpca. This vejy dip. Samowha1 wDCeWivqIV
drained scyl is on lefraces. rt lorm&d irk glaCiaf Pulwash
and v-akcanic ash. Th@ native vegetation is mWnly
�FaSSea, ferns, end a Jew o0nifers. EIEWaiivn is loo to
400 ie-ei- The average annU-21 pr+acapatatjM Is .4!5 10!5!5
inches, line avtirage anTlUal air temp43-reiure Is abaul 61
degrees F. and the aver$�(j frost -feat period is 1:50 10
200 days.
Typlcaklly. Ih@ surface layer rs iaIflC* !�rawelry sandy
'Darn 81]oUL IS inches Ihic4k. Thi subscid is dark
yclbwiSh brcwn very -gravely{ Fbem atm= $ Jntheo thick -
The sUtM1ralum LO a depth qf 60 inches ur mora is d.@rN
yellowish br-awn RArepnely gTavelDy :5$nd.
Included in this unit $1`0 small areae o1 Ajderwoc�d
soils on tIFJ plains; IevereCC, lrldiano�ft, and Riucluarly -5oi15
orr oulwas;) lerr9Ces; and Spena soils in rjepres&iore.
Also included jqrR Sm011 arras of Spark:3Way 4QflS That
have a stOny sandy Imm surface layer and small areas
of S panaway gravelly sandy loam Shat have sJape6 of 3
10 15 percent. Inplud$d areas make up aboul 24)
perC4 M of Lhe Zotal aCreage-
perrnl aWIieY is moderalltly rapid in the,Ut Soj of Irie
BlPlana ay SCSI and very rapid in the Subsiralum
Available wafer cepaclly is 10-. Effeoliwe r lige depol
i5 (550 irlche5 Cr m -are. RUnpfi 1s slaw, Find The hamrd c1
wallet erosion Is thghl-
This unil is Use¢ mainly 0e hayrrand. pasture, or
crWiand, as a Side fflr h+ornos- gr as a .5purco of gravel.
It is $ls0 used as wi1adlarW.
The main rimilation af'Fectin� hay and pasture 3s 1h e
low S1rail2ble watar capacity. R{opar !�razkn-p prauUc-gS,
weed "Utri)l, and ferliilz-tr are noeded 10 1 rnsor-e
msxlrnLJm gualily 0f foragt. R01ali(in ! ru6np heip� !o
mai Main line qualily al forage. periodic mowing helps to
m all alai n Urrif-Dfiri grov4h- discowagec, selemive glazing,
and 4=tmls weeds, AnimpL Manure -Gann he applied
poriodically during the browing season. Areaa tlial
receive hSavyr appilcatlorts should be parr -awed all Iigasl
OnCO a year- In SUMM-ar, irrigalron is needed for
maximum prodkiction of mQ%1 IMaq-E vrops- Sprinkler
1{rig-U cion &S the blest mi�[h" N applying walar. The
am(]urxt Ot wular applied should be sutiicieni to wet file
rgot zone but srri-rd enough to m inimi;z-B the laaching of
plant nulnenks.
This unit iS Suile'd to crapQ- Wheal, oats,
strawb*rriM rtkspberH s, blaokberrl-as, and sweet mrn
aFP comrrronl� grdwn, The main limllation I$ the low
av11&I31e W -Mr c:apacltyr, in ;51J!rrlrrii�r, irFlgatlon IS
needed lnr maxifaum produ-qliQn of moal Drops,
APPENDIX A -6 -
AQUA -SWIRL DATA
Aq ua -rrI T11 Concentrator
Stormwater Treatment
ISI# red a ctio n
Systern OperaUon
Retrofit Applications
Irista ation
Buoyancy
Traffic Loading
Inspection and Maintenance
Aqua -Site Warksheet
Aqua-SwirlT" Sizing Cha rt
x
Aqua-SvArFll Sample Deta it
Aqua -Swirl Tm Specifications
•¢:•�,�Lf F} i
�a?Irr• y 1
�a
r. •�'fk
%ori• A�.. -.
1,o-:• � - =•r•� � _
'k : ��:5 7L T-_ • '� I �_ _ :'mak 'y} '_i2�.
tel_ �r� .. .. 1..•.: _ .. ...
C
• - .. ay:a•J,• ii..- _.•Ai"• _7•.� i
TV
f qua S h'e I d
-T E:i P M WAT ILR TR LATM E NT S0LUTI0NS
Table of Contents
AQUA -SWIRL'- 2
5TQRMWATER TR EA TENT SOLUTIONS 2
Custom Applications
4
Retrofit Awlloatons
4
Ingllallatim
S
6Uoy allcy
5
Traffic Loadig
6
I,hWc d*in �i nd M•aantenance
6
Aqua -Site Worksheatz
7
Auqula-Swirl'^ !GjrL n Chart (FrAg)
8
Aqum-Swirl'" Suing dart trk)
9
Aqua"Swudrl'" 9bmple Mail bravriIng:S
U
AIWA-Swid'" Sp ifKa#ii)ns
13
General
is
Scope of Wad
t5
Materiak
is
Perfocnwre
1.6
Tr meM -of Clamber CGnstn_rckjuj1
1.6
IN5TALL4TION
17
�x[avaCion ar�d Mddtrq�
17
BaCkFF Requlremels
is
Pipe Cmpl ings
le
aI1fIBI0% OF RESPONSIBILITY
1$
SWrnnwalq�r Treatmpnt System Mjindacturet
le
Corltrartar
is
SULMITT14C5
39
ALITY CON -FRO L FNSPEC:iICN
19
3733 Kanasita Driver Stpite B f CiiattarP009a, Tanners 37343
Phone (828) 344-RID44 + Fax (423) $26-2112
g_u aststel d'trrr:_�m
�x Aqua -Swirl T1.1
for mwa to r Treatment System
The patented aqua -,s Wl""starmw3Lar
Ttrt System provides a highly eCfec;k
means for the removal Of SeCF1MCntr
ftating debhs, and free oil_ Swirl
techocdogy, or vortex separation, s o
proven form of treabne nt udl ized In
the stormwrater indListry t -D acr_elerate
gravitational separation_ Independent
university laboratory performance
evaluations have shown the Aqua-SwirlTfn
achieves a TSS (Total Suspended lia)
removal -of 91% calculated on a net
annual tklkls. Seethe "PerAvrnance and
TeW� Seaxn for mere aL-t&.-!g,
Each Aqua -Swirl"' is constructed of n .
ligihLweight and durable materials, eliminating the need for heavy{ lifting
.L.,quipm-Ent during instialiation_ Insoection and mainbenarpce 13re made easy Wit�1
oversized risers that allow For bath examination and clelanokil without entering
the charts bar_
O errs 0mration
The Aclua-Swirl`, vyith -a conveyance flow diversion system, provides full
treatment for the most Contaminated "First fkush", whale the cleaner peok stQrrn
Flow is diverted and chanrl Oed through the m a i!n conveyance pipe. Many
regulatory agenOe5 are in the prod aF establishing "Water quality treatilnent
Now rates" for sped rrc areas ba5ed on the initial rrtiiegration of Poll uta nts into the
storm dT-ainage system.
The trea"ent operalion begins
+cher) stormwater enters the
Agua-Swlrl'� through h �
7 x:
�angtenbal inlet pipe tha L • :'. } t S+ w, Ori
produ-ces a circular (or vortex)y
flow pattern that causes {`.r
contaminates to Settle to the
base of the uMt. Since
Stormwa ter flew IS Inkerrn it#ent
by nature, the Aqua-twirl:"'
R.
rekeins water Ntween storm
events providing both " dyriarrl is
and quiescento settling -of sleds. L, r
The dynam ic settling occur ;• ti . •:`
{ s
during each storm event Mile PIAL-Alz aQ1:zrI5 In the AAUa-Swire'"
the quiescent ssettlirrg takes place
betMen sucrzessive- storrrl:5. A comb4oation of gravitatiarraf wind hydrodynamic
drag for-ces ern urages the solids to drop ou[ of the now and migrate to the
center of t'he chamber where velocities are the Imwest, as shovin from iextensiwe
CFD mWeling. -5rmance and TE-stf�7g" for mcm
aL=.
A large percentage of settleable
,�oEids in stormwater are
reportod w be small and
have
low Seltlirk r
velocities. r _. A.",'
the volume. = ti
Of +-air
Outlet
retalnO in
tha1u-wirlTM t;.':'Net
pruvides the quiescent qeWLnq
UM Increases performance_
Furthermore, clue t-D Finer
sediment adhering Onto larger
particles (loss 111a n 1130
microns, the larger pa rtHes
settLe, rather than staying
suspende€l in th4a water- Rrf1 l� Scor
MLP
Sz
3
The treated flcrw then exits the Aqua-Smd— "ind the arched outer baffle. The
top of the baffle is sealed across the treatment channel, Cheral y eliminating
floatabie pollutants f-rom escaping the sWerrl, A vera pipe is extended up the
riser to expose the backside of the baffle to atrnospheiic conditions, preventing a
siphon from forming at the bottom of the haffie_
As reC13mmerded by the Center for Watershed Protection and several
muni6palitiesr tht Aqua-SwiiiFll can alio operate irk ars offline r-onfiguratlon
providing N1.1 treatment of the "first flush," mawever, thMe, orientation requires die
installation of additional Manhole structores to diverge the flag to the Aqua-
iv9i11-11T11 (or treatment and Conveyance back to the existing main conveyance
storm drainage stem.
U
P- Custom Ap iicabons
a
OistiM ONbgPled 115-9 Twit, Aqua -Swirl'
products to adapt tO a Wiriety cf appllc, kU(rr7s,
0
Retrl lotions . .
The Aqua -Swirly"° sy-5tem can
he modified to fit a variety of
purges in Che field, and the
ark9les for Inlet and a LrHet Ilrl-es
cbn be modified to fit most
aoppllcati-ons. The photo on the
IQft demanstra the flexihirity
of Aqua -Swirly Installations.
Two Aqua -Swirl!", units were
placed We by side in or -der to
treat a high Volurrie of water -
while accupying a smalii amount
of space_ This corifiguraUon is
an example of the ,',tarty ways
AquaShieldT01 can use our
the AqUa_SWirlTM sy teM is dnigried so that it Can wily be used for retrofit
appllcat�Orrs. With the imr-ert of the inlet and outlet pipe at the same ellevati•an,
the Aqua-5wir1TM cart eaSiC be connec d -directly to the e�dsting Storm
conveyance drainage systern. Furthermarer L use of the lightweight mature
and small fooRprini of the Agro- i€1TMz �i
existing InWstructure utility.e.r
wires, poles, trees) would bma un a ffecked by i rfstall-ation,
A
M
ra
Installation
The Aqua-SwiraT" system is designed and fahrii:aled as a modular unit with no
moving parts so that no assembly is required on site. This fac'Ritates an easy
installation of the systcrM_
Since all Aqua5bield'" systems are fabricated from
M1 i
high performance rnateria15r the Aqua-Swirlr" is
lightwelght, and -con be installed without the use of
heavy lifting equipment. UNtiq suppo or cab4es
are provided to -allow easy c0load ing aind _
installation with a trackltoe_ Compared to concrete
systems, u5irrg an Aqua -Wrl` can significantly
reduce installation costs_
In addition, manufactured dub -outs for the valet T{
'} 1
and outlet are prorid ed. This allows the contractor
La simply -aMch the Aqua-SwiriTm directly W tht
main con ante &town pipe vvith rubber couplings. y
Typically, an AquaShieldTm r�preseritativee is presen► - {
on -Site CO @Ssist I the installation process, The Aque-Swirl ' ira,-t31`1eCF:p$Ym9
a VarifkhoC
D*Dyani
Ali Aqua-SwirIT111 Sygems are supplied with an octagonal base plate ural: extends
a mininiri m of 6 inches beyond ttre orLrtside d iameker of the swrrl chwber. The
function of the -extension on this Base plate is Lo provide additional surf -ace area
to counte r any buoya n t ford exerted on the systarn , a he Force s created ars the
bade plake by the weight of the su rroundin g NJ rnate r lal offsets the buoyant fare
generated within the system. If needed concrete can be poured directly CM to the
bb5e plate to provide additional resistl de fes, The Aq uaShieldTm enroineering
staff can provide buoyawwy calculations for your sit-e-speciFic conditions.
5
A AquaShi-erd". Inc,
/-xqLj@,Shie1dW"' 2733 Kan'B!5'ta 1>r'ye, SU'te B a ChaMM009D. TM 3 734:�
M hone: (88:0) 344-:0044 w FMX: f423) 016-211�-
P
www-Aqua5bielaint-mm
AqUZ-Sft� Work -sheet
Project InforweUm
P r a � 6LI "16M c!
Site Use �rlri:M orwg —W—A C—Hedirw IrdZI&M wcp
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5pecif I-ev Information
DQIJ 0 rM rC N V rrn:
Desion Firm:
01Y. SMEW, lip;
Phuniii:
F;K%!
Specifications
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m hvw rL4c imm mi ffdc 0 s - c K w+kyx{ rf 14 1)-- m I-
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Spechler!sSignature:
Aqua-Swir I TIO. Sizing Chart
E
ft
2.�0 ufillnc
v
EW
1.1
I
1�
12
A5-3
3.25 10
1
1.9
110
20
A5•4
4.25 t7.
18
3-2
10
32
AS -!S
1�
24
4A
270
45
AS -6
.6-00 14
30
I
Fi.3
iso
q55
AS -'Y
7 --OG 1(i
M
$,6
S40
90
A9-:�
S. -DO 1s
42.
11.2
710
115
AS-'�
9-00 :i(l
48
14.2
910
145
AS -10
10,0 22
54
17.5
1130
1.90
A 5- i �
12.0 24
48
25.2
�.�� �
� 2-7 0
AS -KK
custarn --
--
> 36
• •
,r
•41�r�hS+ m]ULr 4u�l:tY!r4Mt- +5L F'Ow f816t &hn W i4llpnL-d w;th RWILWQ:hmlx.
1) Tho Acpuim-SwrirrTm Canty-Prlre Flow DrVeYsJbrl fCFRJ prcoMes !v' i;,eMrnw g of aka#
'&Sr lfush." WXY& rha pftk t4s pn LVarm is dJv&q -And ch-3rneled Hyovo fho� main
convey -Race pipE?- few eu� fo your ims,I fvplr a)f.ANv.§ For more rrr vrr riorl.
2j M y rW.9rA8rary agerrc*s are sWaMshfrrg %ovNor OuaNy rraarnwnr Yaw raf!?s' f�5r X� r
-Y-995 d on dhe !rte mwoff r -a of paNuralnrT "0 fF,r. ,p!4�rm drarnage ay&rLam Tho
fmnt 89W rare a,r Phe ,4rj.Ua-SwkYt" sysrem fs em"eereo W r,+se� or exceed rhd
bcOr wafer quWy Orea!mcM cnYarfa. T#ds uw*fir qualily fr49adrrr4;nf flow rate"
dypfc r"sem Uproxlm$ eWy 90% to %.of rile WV &rmvpi
The d-esign and nllWion of the Aoua-Fiber'"' generQlN er+l8ilB. SOHO-dugrue -of cusLOMizarin. For
22&istance in �eslgn and speclllc slzlrbg ugieig hishaaiaal rainfail data. FAnse refea Lo an AQu9iSMO d"
reMWARve arvi!5IL fur-x3bEAe a1 www'.AquaSMWdlry—cam. GAD details arlp spnik- lions are avaklaWe
upm re-uUw.
Aqua-SwirITIll Sizing Chart Llm-etre,-)
AS -2
762
OnrOmira
pe
-
1
140
0.28
203
305
AS -3
9-91
254
40 6
51
41 �
M7
AS -4
M 5
305
457
91
719
-#S-S
15 2A
305
610
175
1022
AS -6
1820
356
762
178
1475
1. 8.4
AS -7
2134
406
914
243
2064
2-55
AS -8
2-439
451
1067
317
X667
3,26
AS-$
7,74a
50;8
1219
402
3444
4.1a
X45-10
3 048
559
1377,
495
4277
5.10
AS -12
� 6-5-p-
610
1219
713
6427
7.65
AS -XX
Custom
--
--
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--
--
' HinW -wiior Q6KMIh' rr+atftrt Iraw raw cbA Im dtpIpoe¢ w4h mulDoi e swIrrs.
9] 1tv Aqua-.,WIAT' C-Onveysm-e FYpw DiversJpn (CF -D) R, WCL- JvM lraatrrmni & ahp
Peak dasrlgn Sl&m as dovrrxod and rrha, mft-1 Uh'ouprh rho main
[ten r r pipe. PfeG-%e- relar r -O YMW M6d rWe$erW4WwrU W rnora trrflcrrr),VrOM.
2) ManY }U+ 'y a aracf ,are aarafalrsk rr.9 -w Wer g4jaMy x doow fa e, fof ahem
m basad aril NY irwral mommorm off pfwutr,rrf-7 ra!O fine s?4rm sy:wem. 7h&
dMWMVW ff&wYVe of the Aqus- 1 "'-s lim as rreera�d �� mast �r �xc ed fhs foc
w q�atrdp ir�$l�C�! critarr�. 41'Ir'.� '1uaz�f g�r�,NfY tr�a�m�t ff�w+ �a��R �r��
re preftrrr'.s ap rnxrrna" 90% j0 M Olthe tots' Rrrr uzv rur D f V-dums.
The desigr` and crien181icm) of tyre Aqua-FilkCr'" gsn,ef$k� -e0lails sung OeW-ee 0i cuslomization. Far
at:�islanQe irl design enct spedrk sizing osing histwic89 rwfall datia, pleas& refer 10 &n AQuaMilM "L
r"r'es'mWglw@ ar vigil ow website et www.AquaSh�eldlac com. CAE] OeWils and s fica-iiom Pre
available upon requ"k.
TN7 ,
In
�Si r Sam Detail l D raw! r�
Sample Ague-SwirjT"' detail d rawir�gs arc- provid-Ed as eta m ples OF the type of
systerms that uaShieldTrc can (iffe r for a SNdfi c work site.
13
to �
-
lqwp" Swirl",, Specifications
gaEN ERAt
T his spetiftatbn sbzll govern the performance, materials and fabricabon
of the Storr'nwat-r Treatment System.
SCOPE Or WORK
Tire aqua -Swirl— shall be provided by AquaShieid-r"r [no., 2733 LCanaslta
Driver Chattanooga, TN {888-3�1�1-9044), Brrd 5ha€I adhere to the Ulowing
rr ateriai and perFormarice specifications at the specified -design flows -an-d
storage capacities,
MATERIALS
A. 5tormsnrater Treatment System shall to made fr.Drn HIgh•Density
polyekhy9ene (HDPE) r eglns meeting the following req uirenierits=
f HDPE Material — The FkDPE materlal supplied under khIs
specification -5hall be i4igh density, hi -91) rnolecudar weight as
suppiied by rnanufacturer, T ;iDPE materia€ shall conform
to ASTM D3350-02 with rrrlfiimllm cell -cla�.sifrcatiork vellues 13F
345464c,
2) PHYSICAL PROPERTIES OF HDPE CO UND
a) GK'ns,ty - the denso shall be no less than 0-%5 g{Crn4 lis
referenced in ASTM D 1505,
b) Melt Tndex - the melt Errde'c th-alt be no greater than 0.15
g{ 10 minutes when ke.5ted in a-ccorda rree with ASTM D
1238- Condition 190/2,16.
C) FI ex Mod ulus - flexu rel modulus sh all be 110, 000 to less
than 160x000 psl as referenced in ASTM D 790,
d) Tensile Strength at Yield - tensile strenfjkh shall be 3,000
to less than 5 500 psi as referenced in ASTM D 63&
e) Slow Crack Growth R06kan Shall L�e greater than 100
hours (PENT Test) as referenced in ASTM F 1473 Dr
-greater than 5000 Fours (ESCR) as referenced in AS7M
D 1693 (condition C),
15
F) Hydro tic Design Basis sha IR be 1,600 PSi at 2,3 degree$
C when tested Mn accordani:e wit} ASTM D 2937.
g) Cour— bla& wfth min imr)m 2% car#Hun black.
- RE3ECTION - The Storawater Treatment SYstern may be rejected
for failure to rneet any of the requirements of this Sper.ification.
PERFORMANCE
A. The Stormwater Treatment SYSbM shall ineluqJe a __-inch inner
ctiameter (10) cinular hydrodynamic R through treatment
chamber to treat the incoming water- A tangential inlet shall be
Pfrwided to induce a swirling flow pattern tllat vvirl Cause
s(dirnentary so3os to accumulate IA the bottom center of the
chamber In such a wDY as to prevent m-suspensiM of captured
particle5- An arched baffle wall s1118J1 tm provided in such a gray ss
to prevent floatafale liquid oilz. and solids from exiting the treatment
chamber while enhancing the svArling action of the stormwater,
8. i he Stormwater Tr,3atrnent Syst-em Shall have a 5edlMent storage
C;DpacitY of -- cubic feet and be Capable of captu ing _ . 9alloils
of petrolekrm hydrocarbons. The Stormwater Treatment System
shall have -a treatment capLac;ty of cubic ieex per second
(tFs). The Sbrmwater Treatm-ent Systern shell be -capable of
removing floating trash and debris, floatable oils and &D% of Lgtal
suspended solid% from stormwater entering the treatment Chamber.
Selvk& access to the Ston-nmater Treatment System s4311 be
provided Aa 30 -inch inner diameter (ID) accBr, riser(s) -over the
treatment chamber such that nD confined space entry is required to
perform roiltine impaction and Maintenance functions,
TRE4TMENT CHAMBFp CONSTRVCTI ON
A. The treatment dramber shall be constnxted frarn scilid Windt "()PE
A5TM F 714 cell class 345,1640. for Sizes above 63 -inch GES, the
treatment chamber shall be constructed from proflie w Eill H DPlr
ASTM F B94 RSC 250 pipe or solid wail HDPE -
The bottom thickness of the treatMent chamber Y41 be deterrnine�d
it accorc6nce with ASTM F 1759. Calculations Must be provided to
Justify the thickness of the bottom.
16
C. The artd outlets shall be extrusion welded on the inslde and
ou tsid a -of the structure usi ng accepted vveldi rig metl)odl .
D. The arched baffle wall sHal I he corfstructed from HDPE and shall be
extruSlU welded to thQ interior of the treetrn@nt chamber using
-bccepted fielding methods with connections made at 1.80 degrees
of each end_
E_ HDPE lifting supports m,�y be pmrided ori the exterior #F the
5tormwater Treatrnanl- Systern Irl such a way} as to allow the
Prevention Of UndUe stress LO crkical cornporaent,3 of the
Stoirmwater Treatment SYstem duttng loa-din€g, off-loading, and
moving operatiorm. The 11fting supports sharl be coristructed ar, an
integral part of the treatment chamber and extrus+on welded Lising
accepted welding rri-ethods-
F. The top of the treatment chamber mall be built ba the
requirements of the drawings- Deep burial a:Pplicattons shO require
a rein rorced KDPE top -
Reinforced concrete ids spanning the treatment chamber will be
req-uifed vf1th traffic rated frames and cgrers when the 5torrrlwater
Tr trnant System is used in traffic areaLs. A prol`e ioniA3 en-gineer
shall approve the design o€ the ooncreti� pad and the calculations
must be included in the subrinAtal.
The manufacturer, upon reque5I, can supply anti -flotation}
buoya rtcy calculations. in additionr typical ft vdngs of the
A quaShieldT" 5tonmwater Tfeatm�znt System with ncrete anti -
flotation !sfructures tan also be pfovided. Anti-fl-otatiao structure
design and approve) are u Itimate4l the responsibility of the
specifying engiinter. The contractor sh-all provide the Emb-flotaition
structures.
111STALLATIO N
A. ExcaYatiun and Bedding
The trench and trench bottom Shall be cow$tructod in 2=rdance
with ASTM D 2321, SLIEttan 6, Treruh Excavation, and Section 7,
Instaitatlori. The Stormwater Treatment System shall be instailIed
on a stable base consisting of 12 inched of Class I stone materials
(angular, cru!�ltie] stone or rock, crushed gravel; largo void coriterit,
containing f it&� or M fi ries) as dafined by ASTM D 2321, Section 5,
Materials, and cornpaced to 95 proctor density.
All required safety precautions for the Bt❑rrrywater Treatment Bptern
frt5tallatiun are the respar�itiijiky of the contrator.
R, Backttll Requirements
Bac011 materiais shall be Class I Dr 11 stone materials (well -yradeo
gra"15, gravelly sands, containing little or no fires) as defitled by
A57M D 2321, Section 5, Materials, and compacted to 90 proctor
density. Class I mat-erials are preFerred, Backfill and bedding
m aterla Is Shaul be rye of debris, l3ac�€Fdl hng shall conform W AS -fl,'!
F 1759, Section 4-2, "Design A uriiptions,R Backfill shall extend at
Feast 3.5 feet beyond Zhe edge of the Stormwwater Treatment System
for the full fie-ig ht to sub grade and exzend laterally into
undisWrbed soil,3.
C. Pipe COUp11ngs
Pipe couplings to acid frGM the 5CO'I Water Treatm-ant Systern shaIK
be Fernoo;:�'. M is ion` or an equal Wpe flexible boot von h stainless
steel: hansion bands. A metal sheer guard shall be Used to rmtect
the flexi!bl e boot -
DIVISION OF R ESPONSIBI LM
A. Starrnwater Ttvatmdmt ; stem Mannfactur&
7h -e manufacturer shell be responsible for delivering the
torrnwat-er Treatment Stem tr the sit -2. The system ir)cjudes the
treatrnenL thamber with debrls baffle, inlet and outlet stub -outs,
difUnq supports, 30 -inch 10 Service access risers) tc grader with
temporary co r(s), and manhole fra rne(s) and covert s),
$.-Cootrattix
The contractor shell be responsible for preparing the site For the
system Gnstallatioa including, but not limited to, t rewy sliorif1g,
excavatiora, cutting and removing piPEr new pipe, bedding, and
compaction, Thi contractor sh-all be responsible fo,- furnishing the
means to llft the system aarnpcnents off LNe delivery trucks. The
ciontractair shall be responsible for provlding any concrete anti -
f1 oat ationjantl-crr-ep restMantr @nChDIS, collam, etc. Mth any
straps or connection devices required. The contractor shell be
responsIble for Field cutting, if nQctss2ary, and HOPE service access
risen to grade. The contractor shall be re5loms1ble for sealing the
pipe connectlons to the Stormwater TreaCrneint Sysem, backfill -Ing
and fumishing al€ Ial or, tOOISr and materie€s needed,
l.6
SUBMITTALS
The contractor shall be pyOvided with CJ;rn-;,,.sioaal ,drawings; anc when
Specified, utilize fhe5e drawings as the bads for preparatio-n of -shop
dravvangs shoviing details for construction -arid rej10f0r6rt9. $l Vp drevvings
shall be annotabEd to indicate all Mat,erialr, to be used and -all @ pplicabte
stsndar& For materlels, required tests of materials, -and design
assumptions for structural an-alysis. Shop drau.ririgs Shall be prepared at a
scam of not less than V,3 incli per foot. Tf ree d 3? hard WpieS of sa Id shop
draWinq:S shall be s,ubn-,ikted to the speeffying engineer for review and
approil-
QUALITY CONTROt INSWECTION
A. Mate'rlals
The quality of materia Is, the prdCsss of manufacturing, and the
finished sections shall be subteCt to Inspection tfie specifying
engineer. Such Inspection may he made at the place of
cor.structbn, on Che work site after delively, or at bot4 places. The
sections shall be sub t to rejection at any timc- if material
eor)ditlens Fail to meet any of the -5pKifcatidn requireml ruts, even
Though Sample sseclfioris may have been accepted as satisFactofy 3t
the place of manufacture. Sections re*er�ed after delivery la the
.site shall be MaTkea For ii-tniificatron end shall be removed From
t silo et once. AFI seOon-5, which are damaged beyond mpi�ir
after dellvery will be rejected, ate, if already installed, shall bQ
repairO Co the sped Fying engineer's acceptance level, if perm itked,
ar re moved and replaced entirely at the con tractor's iaxpense.
All sections shall be inspected for general appearance, diMensions,
sou n dne, etc,
Defects
Structural defects may be repaired subject to the acceptancE of
the speclyng --ngineei-) after demonstration by the mnLJfaCtUMr
that strong and permanent repalim will be made. The specifying
en-gineerr before fl real aCcepxancc of the corn pocenks, sb a II cs reFuky
Mspect repairs -
39
DISI -GIST GEOLOGIC, INC.
January 2E), nO9
j YC ITA Medical Offict Building LLC
2$40 Ciitc-5 ��n-ee!- S.W.
Tui winter_ Washington 98512
Attent ion: SMt R itter
11y"1
Geotechn-pml Hvalual inti
Priapowd OAU. Merclal DevelopmMI
SR 50? and Tahma Bon1cvjTd
`lmlmr Waw hi]llgt[ M
File NlwnbeT 441 -0U1-]
INTRODUCTION
Itrsight -Cieo3ogic, Inc. i•s plcasrd to pmvide our mport of sib soi I aondi[ios a5 They
relate to pe hnical Propertie5 at tlae site of yaw pursed m-BdkV1 Ofbee buiildijtg in
Yekh, Ww54ington. The property i� ]o,.dttd wcks1 of the irtttrs�ti,o� ekv►�ern Starta Rokiie
507 and Tahoms 13gki levard in Yi2 tt, The ]ocwign of (IN proprity is Shown PtIal ivy to
j surrotmdinLz phYsical fcaru=s in Etre Wein ity Map, Figure 1.
We u3tdeasia4rl thy1 tile, propped project w5]1 hmljm a thrix s-ngI 51or}� and ori -2 fair
5" Wn,.rneMia 1 1akti ldlrgs, along with appurlwont dm'ffways and pari-' ng auras. No
excess loads for the btrildir s are anticiPwi d. Wt u0ai rid th�m $1ormwater Cram the
prgxmad development is to be infiiitnicd to the wbsurfam tbroagh an infilttatifm pond or
substa-fiew 8s1leries located on sift. Our €avices wqn oond4t-toad in j cea al a irdence
i
with our Propose] dated January 2, 2MR,
DOPE OF SERVICE
The purpCXW of Vur scrviee5 Was ko eva"uate 541bsurface soil cmditiorrs as ahq relate to
ifounder ion $1W Pavetmnl d,esip fib' the rpl-oposrd davOripnter t, T1= specifir. tasks w be
performed axe outl fined b low.
i L- Cpndk3ca ?i she reficarmai sencc [a valuate and mark proposed test pit locatilmo Al ing
I silo_
2_ Provide for clearitm Headed to scows tht property and test pit lacatiorts� iC rrecesry_
3. Pcrform u61Jly location at the $ire. Ea ewaluare tfte prc=ce of sttbeurfai= ubstru� =' S.
4_ Exoaww as man} as 6 expl=wev test pits Al! the sits using a backhoe to &-lAh; of
About 10 feat below ground saurfsce_ Teal pis WCYC CY.Mailed in the area of the
10t5 Etsr r.rm AiEPi .e. -b4,frepia, WAZH106TCN 9$-5H
Now 5Da_943-5+0M FAA: 360.754.4299
Yelm Medi -Val Office.BuiWing TALC
January 20, 200
Page 2
pn-Yp ,J building} drivewav and parkhtg aTcas,
5- ?v iumain ]ops of thg soil enmuntmd in the t-ag faits 31k 1 aenaai ewapdance wh b the
VraifWd SO'7] CltssificatiOD System.
SITE CONDITIONS
GENERAL
T'hC s,i(t is Joked wesj Of the inUTW[ion hetes Yelm AvenwiState n ighvway 5pq
and TAhW" Lou]EnW. T1xe site is filiown m[ative to ormunding physical featam5 in
Fi$ure 1. The site is kTdmd to the north And vmm by mie dcntia] prvpratl, to llt,e east by
Yelni Avenua and midmtial prop" 9nd to the south Bou Lem and a
co anm ial devrlcpmeAt,
Tihc peopem is gemully reurangular in shape ami CWgXi # IRx parcels lotdling
appr=iwatehy 2,5 aeras, The site slopes gently franc est to v4•am. :Sile rlevAtians rang -v
between ab -out 340 fit anti mean sva level EQ about 330 fact M SL in tEm wezq m porL[On,
The Pro" i5 cuffew]y dewe`]OPC�d with residen arkd txymal Small ME buildings. The
site is ve�cuted with grass, and Dwgias i —3r tamR.
SURF IAL SOIL CONN T NS
Surficiel sail eondit -ins weN 6Valuetcd by ittriewin the US. Dcpartmsem of
Agriculture soil Survey of Thorn= Cot3r , WashirL&rwn dated 1 �- Acaor&ng to t`!ic
soil survcy repay the sits is underlain by Spanav&y stony Sand} lUm and �paaa)vay
gmvelly sandy loan), rnLts— t soils exhibit rapid petrrYe�bi lity, 0qW water ruunafir and a slight
hal-ard ofermi%Dn,
SUBSURFACE EXPLORATIONS
GENERAL
Sub9al face cmditivis at the site were cxplwcd b}' � test pits at the
Approximak- locations 8"n in Figure �, The lest pit -9 were exmavated using a track-
mcwntW backhoe- The test pits VWn oumpleted w depths of ] � feet helow ground surfs,w.
A geoloZist Frown lnsigltt logi, tt'kottitared the excavation a the test pits and
maaatained 1095 of the soils tnaauillered. The soils were vi-sually-ninsifted in grmaral
accrdaacr with the system dcscrgbtd io }4�TLM D2AS ,06- T s of the explorat Im
Pits are contained in Atiadunent A of this mpnQt-
_Fhe O'xplora CTY te!1 pias were. baekfilf-d Ush)g the soil reaioved i=rom the test pit.
lackJilled soil w$sttped in place using fife lxueker oxf tlse exator, ihc bak]]ed poi]
was 11W torkpeotcd as structure] fill and Aauld be expected to settle QVrr 6nie. If
structs we intender to be *Aocd over the test pit areas. the soil should be over -
excavated
and co mpaved,
i-NISIG 1T OEOL0*1c. INC,
Yelm deal Office Building LLC
.farivary 20, 2009
Pne �
-SUBSURFACE CONDITIONS
The soii exposed in tale test pits ;�unergl]y Gon!ji5ted gf sated with vary -j" smwUR'i!s of
sjlr, gnav+el Fwd cobhlrs. GeFWMI IY tie upper 2 to 4 fret of "il u4nyisled of malid with
modrrate UROUAts Of gravc] 23W cobble -s_ A eve] knit was cncoutLtescd iTl. cest par 711-4 jMt
a depdh of .5 feet below graun,d Murree and cxtederl to the fila d,cpt]s of the exploration (]0
).
Ground }Wates was nat er ,=oared in aW of the teg fain CLU659 our SWdy_
CONCLUSIONS AND RECOMMENDATION
GEXERAL
ThQ test Pits conduct -cd for okLr atL34 revealed the prrsmscc of sand with miiabl-b
ainovau of gavel to the rnAXiInUM depth rxpCcre i in our tcsl pits. These 90-135 appear to bt
suitable Fcr the pr4pGm d commercial de•-rIopr rt pkjvLed for the stw,
li is our Finian, that CnnvetltiunRRY 9upporled buildings such as di -e proposed #ffwr'
simccire deziVed fcr the bm$ ng rapacity of shoe soils will be ap m¢priate Fee this site.
EARTHWORK
Vire ftp& t that site gmdiiig may he a ripliglrecl u5inS convenfioLlu] oar;&rjjovarLg
equipment- Thr sails in Ilse upper rym fLet of the Mile contain ttloderaic amnunls of fines
and Fnay be moist:Dre sensifi3ve. These materials may he di ic,ult to opcsati-, ori or coartpaot
during -r.o w -Each_ We rccarn d than eartihwork be uTtcleriak-en during paiods of dry
%weather 0 mdi grading Casts.
CIiaa rI.ng and Sits Pxapamtion
Al] areas to 16.� ceded should be Glearcd of skrf ace tad subsur a deleterious matainLs
ancludi ft frees, soda brusls, debris and other unsuitabia <r organk niverials. We cxpcc[
Chat sYtrippin@ depths of about 6 ifiches will he rcgpired at tike silo to FMOV0 the SUrfiCfid
-wi15 Gocttaining substantis I R[t OU31IS of -areAnic MFLIelial. Dftper Stripping 4ertbS May ba
recpaired in arras a h,PRvy vegetation ar, if the 4;Iearing cgcTatiom oausc xo:t iue
disturbance to the sueficinl soils, or if afklWonal unsuitable sWG arc exposed dkuin�
strippmj� -paratiolts.
We mm= and that any trecs be removed by avorturRing &o that a majority 4f the tree
rooms ata rcmvcd. I cmvvii r, frm lree remvil cpcTaticrns ghonl-d be bi t&fllled with
sirucmml fill cowpats�d to the densit6n Grjdicated in the "SrFucturai Fill" section 6f this
report_
INSIGHT GEOLOGIC, INC.
Yelm Medical Cffioe 13ui€ding LIC
January 20, 2009
Pam 4
The SHpped msferia] 1:0be stNwidd and rjsbd ]ate' in nonstwuml $i�p1icat31xns
(e.g, I.-Dtd=ape areas). lwiatetj-Als Ihat cAnnot be used fcr ]ant seapjng s Ld be mnwva�
from (IU', pr*ct site fond wasud,
Subgrade Preparation
We =nmmmd ttbat a member of sur sEafF ffv;B u to the �posed subgradc conditkans
sfkdr strippir39 is campac#ed and prior to placement of aFLystmotur&I fIE. The exp
5,04
subgade soil s]rould be ]"tj�.d fry prod a.0J]itjg with hevvy tubber tired equipmeart
during dry vveather or by probing wit4 a iryoh divnietbr steel rid during wet weather,
Any c*ft, Imse or otherwise uFLsui#able &Tcas de]iitle3icd dwrirLE p_mQf rojj4 Cr prp�ir3g
should be recompac[ed, if pfWita3, OF uVer-exm-vated and rcplacerd by struevrs] ELL Wed
on the reuGmmanda6ans of oar site repm5entativrr,
Afbrf,oropl4ing the pmaf ro]]in& 11w subgrade areas shouW be recompazled to a firm
and uayiGldin,g ndition, We race meEid that a =mbcT of uw staff evaluate tlse
u packion effan and ark+ {ximpected suis. W -e rec:omrrrnciA that alt subgrade ar
em
death COwJwaY-9 b—''WiftPecUd to at ]c&st 95 peraenl of flo soil maximum day density
{MDD) in aemrd&.Iree with ASTM DI 557 test p occdum.
57RUCTURAL FILL
Gii? rreral
All FiJJ that is planed at the sits bej=ath stracturm an or pawemcnts shuuld he plate
8S stMOWral fill_ We feMmaiend thml. afructulai fill k five of dehrJs, sigrtibcaol rwpillie
materials and York ftagrnent� larges than ab= 6 inch s_ 'mac war&ility �f mrEoerials fir
Me ea Sh-rcxur*l fill dtpCnd5 ods the gmdation gird mrsistkim '.aretent of the 16il. As the
amourir of fines it CMMt:5, Wil i CCCM" incMsin* rnore sensitive to sjrenl l ehai in
MO'Murc Meal, -C nPa,ctvori of "eive soils in aDmrdan*e with the F*wmmqwac30nr.
prov3d.c4 in this report tires becomes diff=ll or irnpossib]e 16 sch[ava if iFu; Apj1 is move
th,r optimum MCC VLure £4M11L
Att III] and bockfili beneath buildings should be comps LQ at lag 95 t of
soil. MDD. basad on ASM DL557 (modified p t43r) trsting prmdure- ]'a,rem"t
suligmde miis end L61 iky trench bwkfrli should be spatted Eo at Jeaet 90 percent of the
MDD up to wiihiri.1 feent of design gradex, the upper 2 feet skuid be cornpAc#ed to at loam
95 percent oftbe MDD-
The lift thick used during placement Md oorapaction ofstramral fill will depend
Un the nv)istum and gradation chAranterist[cs of the sgi] and the type of equipm w being
used- If necessary, the material should he moistum conditioned to near-cp6mm moi -stone
eons# pfiOr t-0 e8mp50ion. During fill. and backfill p]ecem strfficient wires of irt-
placa densaty should be perffrmed M vcrl F� Ihat Adquake wn pa,ction is beirtg =Itievod-
INSIGHT G@oLQ-xIC, INC.
Yam Medical office Building [,Ir-
January , 21
Page 5
Strltablillty of On -Site GAaterials as Fiil
DUrin dry WCAMU aMstmrtion, any non-&rpnic uasite soil maybe cc5!iiderad for
use as str uhHaL fa]]; provided it mcum criierLa ribed in the Strrrtctural Fili lection of
this rcpart and caa be ctmpacred ss reccmmianded. if the =tcrial is rnrer optimLkm
moislure content whelk exthvatO, it may be neer, to aeTate or ft the $oil priGT t0
PI&MMAM As smmril fill.
Tom porar y Cut Slopes
Temporary cut 61opm are anticipated for construction of :undcrgraund utilities- A.11
Vrnporary+ ClUt sloes Rnd shCrirg MUSt 4Mmp]v -Wft the pro jzivns of 1Yashingtnn
AdrninWratiw Godo (WAC) Title 29L6, Piirt N, ' meati.Dt4 T r-hing and SLwrh,g.°7 T W
ccn&actur-pcdbrmigg The work hHN the primary re$�ronsib lity for proleclian of wc4tem
and "juem improveynen% dfeidi"g wl)ethar to nsc shoria)g, and for establishing the safc
inolinallon for orpea-cut slapm_
T'Mporary unwppnrWct cut siopts mere than a feet high may be inr�] nod to l . :1 V
MMM119ft Sth-,pnms in Ihn soils, This guideline assimmes that all aurfac.c loads ort kcpt.01 a
rnimirnum distgnicr- Of at 1,� Ow MY thr< depth of the cul away foam ffic. top of rhe Elope
"d th2t &* ;ficAM $tE�e is n01 pr=nt in nM slope face. Fla" slopes will be
nca=ary+ wher-e &19nil30artt ;5ms jWge -Occurs. So= sloughing and ra ting of the cut slopes
should be €p r d v iimr. Temporary cdvcringwith heavy plasne shD&ing should k;c
3j$ed to prowot those slopes during perioda ofwaL weather.
FOUNDATION SUPPORT
111t soilsal ilar sites arc gc"ra]]y ire a Modemftly dense rondidon- Spread fwings arm
$pproprtate for tie soils emcountered if artlieipal,ad fooling loads do not nneed 2,000
pounds per square foal (p for combined dead and long-term ]i-ve Loads, cxclu Ne of the
weight of the footing and rwerlyi ng k kfl R. This "lue may be iriuuwd by one third fair
tfan5jera loads Such 9s those induce by seismix P-vcnts cr armed L*adiqs, if higher loads are
8111icipate4, dCep f0tL det3oms ar removEll of unruitabir vii anal rnplaosment w1th Ar=ure9
fill) should he considrred.
We astimAte tbW serllemrent of foatings descried as mmmmcarded will be lem Than 2
irmhc5 for the ankicipated lflad €auditions, with dilferentlal szmlcmams *f Less tba-R i inch
bfftwm corrpsrably 100idrd fnaljap. Moss of for sctrimnenn should es tialty occibr as
loads are beim applied. However, d39urbamte of the, fotmdation subgrade during
construction or the pmsnnce of ]cam Or soft soils below the fbundatiotn could result irr
[ArgeT.wRlinmisFLU tban predicted.
IM;�Ir�H-s G-EOL9-7.1C. IN -C.
'felm Mr -dual Offi0r, Building LLC
rauuar� 20, 2009
page G
Footing Depths and WWths
Yca. fp)st and mesion pro tium, the h e Of all ekheriQT Wiings -9 ould bear E t least 24
it-he.s glow adjaoenf aLttsid-e grades. To limit pest-onstM0t30n %Vlements' aontiauq�Is
(wall) quid 15Qlated (culumpi) foaling shuuW be at l"st ]J3 and 24 iwhcy wide'
respectively.
808ring 5ubgra-lea At Least 12 enahe.,;, -of stelural X11, wrnpoeted 10 a density of as
11cast 95 Perm[ (based on ASTM:D-f 557), should underb-- spread foci tngs on Eris silt_
Literal C�vcresesvaftn Because f undation stream m trarisferned outward as well :flg
downward iarto the bearing soils, all stfLkouraR fil[ P]acec[ urxder footings, up to �I. fftt in
thickoc", should cmand harizonts]ly nrurward fidm the &dF of �_aoh footing This
h0rizMta] dirtanne 5hw[d lac equal t,o the de)lh of placed Fill_ 7 t}efar.D fliil drat exiands
12 inches, behw the footing bay shemId aiso exlend 12 inehm oumwd kwn the feting
sd,
941baradle 0bre maticrr All mg ri"grades sgkLW consist of eitlser firm, urLyicilding,
naive soils or suitable structure[ hill matuNals. Fogaingt g]3ou1d never lay ss 5t atop Jot►
5 Or frO= sGil, dough, debris, cxisting unconlmiled fill. cr surfam cowered by
sEarrding water_ We recommad &fti k mpresvnUive of Mir J!= observr rlLw oandition of
all sabgradc� bofame atly cwwme is placed.
Laf.Rral negFiRg Pressures In sur opkniagp 1br statk Joodini�, fbotiiygA; that bear on
properly piepared, atructurtil fill sul5gradts carr be d,�sigjled for A rnaxinAl nr a] Ig+'ARble sail
bcarir,� pressures ref 2F -Q00 psf. Lateen[ ging pressare a the silt sod] is ] 25 pounds pt�r
square f0WfCV bc.low natural grade,
Feting Settlement Wa esfim:3 c EW toda3 pagt.cortsteuatioa set kmDcnt5f proprrly
desig td footing.5 [car�qg orl Proper[Y Prtparcd subgni,dck will noA exceed 2 in,-hoZ.
Difjeren€i31 -5attlemcats for Wrnpeu- blY JWded clemearts MAY approach One-half of this
valve ower hMaod,tal disran-DLIS of appTQXj eateLy 50 feet.
F00tl r1!q and !Stemwaf] saOil To provide ero5ior, proteoLion and lateral load
resisulcer we reoonttrieod tune all foiNlin.R exe Vatiom be baafiL ed on both sides of fhe
f ings�, mtaining W1116, Slid ste=W.015 after thtc r�cratV haS cured. E, CE imparted
atmOml fill or norl-organic on-site soils can be used tor tlhit, pure , CCWtirrgerLt OA a
sviub[e maisdme 6ottttart at the 14M Of plaoerreat. l ardjess of moi3 type. all iooting
IN210"1 �EOLOtIC. INC.
Yelm M-edica] Office Buil&4 LLMC
Janus 20, 2009
Page 7
hac011 soil should ben campaeted lo a dentity of at least '90 pircent (based on ASTM:D-
15.57)_
SEIS IIT CUNDITtONS
Baud on the -soils exposad in oalr explontiams and our Ftvim ofpublishrd gwilDgic
maps, we interpret the rutsite $oil ndiliioos to craTospmd with a seimai-c :�itc class Sp as
defrned is Lhe 2006 IntSMat Onal building "c (WC) Table I6]3,.5 5
DRAINAGE CONSIDERATIONS
Fauridati.on &aim should be used where (1) =w] a or bas=nts will be k•.elovy a
strrnemm, ) a slab is below the Obtsik gnlk, and (3) the o❑ftide tpmd,e does nol slope
&rwnward Rom a building. gains should also be placed at the base of all earth-rela-ming
walls., Thee drains should be Saerotu5ded by at ]east 6 jac;�es of 1 -1=h -minus, washed rode
and then wrapped in mn-wave, geommle 1-1 1ktr fabric, At its highest pnin14 a petf=ted
pipe rftven should he at least b jubes below then harm of a slab finer, and it should be
Sloped fbT drainap. All ref a:nd mirface water drains must he ktTA =puaft from the
faundatoon drain syUm. f=inal site grading in sraPs adjacent to the baildings should Dope
am-av at km4t 2 p , except where tl c area i5 Fav*d.
Tk meranmended pavcmant sectiorw fbr paT14ng ares consists of 12 inches. of
compwArA grarnialar illi sub-Lmse} 6 inchim ofoumpacted crljsited rork base coum and 2
inches of aoah comcrete pavemem. Hid+ tmfrapd driveway areas should hAve a
t3i3k[UMM Of ]'2 inches of eo npdaed gramlar subbelse, 6 inches of wmp" $ranular
ham materiai aW 3 inches. of ntph2hlC conorcte,
STORMWATER INFILTRATION
SLxmwatm pl-Pas for the proposed pried havE nol yt beam dvve]tapt:d. Basad on olrr
obsm-vstiom5 in miT expkmory test pals, OM rMart$r inOt-atiort rates ray hen expWe� tQ
be ore the ardes of 20 inches per hoar mr Zrmler. The gTavtlly sand soils may be clarriired
as Catcgxy A soils Atlaiomal by"g of soils i k the ureas of proposad Memwa#er
dispaml strumms will ba neekd fog design perp s.
LIMITA71ONS
%Vtc have pmpami this geollQgical report for use by Yclm Mcdbml Building LLC and
193eir authorized "eats fir the prDposed dew].Dpment ot=the pQoputy in Yalrm, Washinzion.
Witlfin the liatitations of schedule and trudge[, our scrvicrs have bccn exatutcd
In accoklatwe W36L 9cn=ll:y acecpt--d prsctivas in the CL -old of geoLogic:Il ungane43irLp, III
I H$IGWT � EOLOGI-C, FNe.
yells MedlOai Office guiding J,J
January 20,2OOr9
Sage $
this area at tht: time this I-eMrt was pmp*red. No warranty rr mh7 y cjmnditicmr. express or
fmpi'ecd, shield be undmtood.
PIS raker to Attachmem B titltd FP,porE Limitations andidtliTMas fir I)Se far
additional MOT= pertainGng Lu USe loris report
-4 * t
We appirmiat-E the opportunity to'Irsi.9[ l� WRh this pm t, PleasC Comet o5 ifYOD
Itawe q estians regwdMg the irifcrmsjmion presented in this vcpLvt or if " can provide
additionaE servi,m,
.Mt wagzhNj
C, r
1�Ir1111�11d'k� �, r,�alfs�rl
AttSC,bm;mts
Very Iruly youm,
INSIGHT -$Irmo,0,SIG, I
�Yiliia •. 1�]alhcra, �.,�,F
Prin�cipa]
cc: JiM abMM, RR — S,hEa, Curr -& ]eWell Bnoirreers
IN%I.G#iT GCOLoGIC, INc.
i
I� 3Nnofd
i
'3N 1 ` I 010 1HDISNI
HVION
Cow vw mvaw ww 32
-LL,
it k LL. �
Li
%00 XI 3-
----------
li
%00 XI 3-
----------
ATTACHMENT A
TEST PIT LOGS
Pmjed Namire; SCOTT RIr-MR Dale: 1AR
kocMun; Yelm, WYA TP -1 M
Total depLk 10A feet
Dupt, REMARK -5 AND
Vow; :UlbDkw uses SOIL Da SC RI PTION OTHER T FE 5 T:S
0—
TOPSOIL
SAND: 131 k, hng Lu meonim. With fine tr� course oravel.
cobdes, Irooe -Sift, mDisi
2--
lighl bn7kvn
WgqU Vy LmChWdmz
OPWaGW. Insigh4 Qcgftglc
BAIM WOU5611, M.
'Pro�wl Narnm, SCOTT RITTER
<~o�-'alion: Yelri14 WA
OWh
TP -3
501L DRSI�:RIPTfiZ?ro
Pale' W 2M
Tdlel dooh: WO f F
REMARKS AND
ETHER TESTS
7
-9F
101
ill
1� F
1�f
141
15L
Lcgge4 5k: Leo Cbaidaz ----
Canvacwr: IIMBIght GDolo�it
EQ4ipmCnl: �3Ckh c%Icmww�
hf61GHl C�EOM11, INC.
Pmjeffmarne: SCOTT RITTER Date.- lft2m
1.wnflnn Yelm, WA TP -4 TOM dfoh: 111-0 Not
REIMAkK� AND
S011- DESCRIPTION CITHER TESTS
TOPSOIL
SAND: Jarown, firm to GDUFSe. PDOHY gf;kdacl- with tine lo c*ama
gravel. and cobbles, 1we 9M. magst
2 ---
1A
L
hcreasing i3MOLMt of com-e gravel
k1GF' GRAVEL- Dark gray, warr.B, with me-dium sar)d- and cot)We:3,
moist
a
i1
12
I �
14
fine gravel, IM 10 C-OaTE�;5�nd, molst lo we[
LEgged By Ls4 Uhsiiltz
Cftltadur: hnsdght Gam"jC
EALipmert: BRuma@
Praied Name: SCCfiT RITTER
L4Gpiiun. Ye en, WA TP -5
' wplh
I(re�lp {i sr UGCS 0IL DESCRIPTION
f
2
3
4
Doe: 1Mmo
Trrkal dephh,: 14--D lel
RF AND ,
— 01 HEIS TEM
INC
11�
121.
i� F
14 k
15L
LA4M 0 Q�r. Lto Chm-
C ---ripe Ineiglir Gectagi.:
Equk�-enl• Backhoe
--I- ---
V.-IUNT GHWGIC IAK.
Projed Nares: SC07T RITTER
LuGAian: Ytlm, WA All TP -6
u�
troop L i H ,r ugc f SUL ID SCRIPTFON
Sp
3
1OF
11�
12F
1sF
14�
TOPSQI� -
SANE): Blarik, fins. pcarly!DraCeLF. wish find LO cowse gravel, and
cobbles, Irace e.RL, moil
brown,
a&rie co��Ie!5
Laq[rd$k: L���haldex
C4rtr} "r. Ib*I!ihd l;•ealo@I�
RWIpIF M! Back1har
TOW dEVh. 10.13 Peal
REMARY.S AND
OTHER TESTS
smallor size rwWes
MIGHT GEa MD;, IHC.
i
Pr-DJed Nerne: OTT RITTER DOW 1112M
Lowlon: Yelm. Wjk TP -7 tuWl depths 10-1) feet
1:101 REAP RKS AND
MAO �'Wp-&Jwp USC!3 ti SOIL DESCRI PT -110N OTHER TEM
T
SAND; Gray, rine, poorly groftd, trace slit, rwist
bllavk, with Cobbles, some line 30 Medium gro v431
2�—
M!
4-
71-
13
14
brOWn, With CO@Me gravel, same 00bblon
some inedium to ra@rgQ gravel, Qchbt)ie!5
LNWJ By: Leo Ch*dej.
CQWYK�0;: lm�pz aoiNogic
EquontarYl: thekhce
ATTACHMENT S
REPORT LIMITATIONS AND GUIDELINES FOR USE
ATTACHMENT B
REPORT LIMITATIOff $ AND GUI-DELINES FGi:Z USE'
This attachment provides - fwmatior� to help yrju mama your risks with resp a
the trsc of thio rrport.
GLOTEC H NICAL S ERViC ES ARE F E RFO WE D FOR SPEC IF IC
RUFPOS ES, PE RSONS AND P ROJEC TS
This report has been prepared fQr #kip exclusive use. of ow clic t and thea anthorizcd
$Gnt!�. This report may bc madG n+ a i Lable to regu€atony agencies far revjew. This report
is not intendW for use by othfrsa and the info trration mniained herein is wA applicab€c tr.
other sitcs_
insi ht Gepb& ]nc, stnrc =-, ow spices to meet the a]tecirjc meed& rd Uor clients.
FM example a ge0tedMiC81 W Vmlogic shady een&dcd fw a Givil iacr or erchL l
mmy nit PaltiII the tweeds of a construction ccmbra! t c or even Ln r e[vi] en eer us
amhlle.et til am iovuly d is the same. prgjeex. Because SIL c h-niea] ar geologic
study is tmialue. h gMe nical ea3&e&Lng or geologir, r4j-pvrE is u.nique, prepared Wiely
Nr the specific Client and prcdect Site Our rePW is prepared for the excJtosivc ruse 40 -oar
-C9icnt. No other party may rely un Ilrc dam# of our suviam tmIe% we agree in advance
t0 su,ch aeLi$t-Lce ilk wri14- Thi-sis tv provide CMr fM. with magonable proccdioo against
Cpm -ended Uabilit+ Clai ns bw third pwtiw with whom there wouid otberwisc he no
contraeaitai lhics to their Bores_ Within dw Limitateotrs flf scripc, Vhedule aftd Lwdgci,
our $crvicas have beeil umd in ecc4rdaaree Wr h our Agirmaera wile the Client and
pmTslly :tovgAed geo4echnkmi prractices in #iris Ueft as the time lhis TePM w$S 13repare4..
This rsprnrt sbov1d. nol be aPpliad f0T WW purpose or project except The cLu miginaiky
cmtrnplated..
A C EOTECH N I CAL ENG I N E MING OR G E OLOSIC RE PORT 13 SAS E D ON
A UNIQUE scr of F ROJECT-SP EC I F I C FACTORS
Insf.ght GeDlogic, T= cottsid&cd a number of unique, proje.a-spmifiee faCccn when
estabiiskng the supe of ftTYib%� fbr this pmjva and repon_ UnIa5s Insight Csologic
spcciftnal ly Wdimtes otherwise, do not My on rthis report if -LL ww:
r�oh prepares for you,
+ 3IM Preps fi)ryour pToJec�
r oL prepwvd ii)r lire specific site explored, or
owrtpleacd laic impwunt project ohltgts were made.
For vmmple, chanRm that -can affect thr applicability of this report include t ickx that
atTcct-
* 1hr, furicticm of the prcWsed struciut
' DcwloW hard 8a rrtblerial r57 v Lkd by ASFE. Ftokssinal runes Frucicing h Ox GScrdaeIN;
w1xw- s tS .
ele"ticM, D l3f391 atiM, 10eati0n, oricnlaliOD Or 5vltight of tete proposed 5Y1nCttSr1&-;
* i2omposi4ion ofthe de!�gri teem; or
* pr-Pjeet evenFFship.
If important ClMnges arc DWdC Bdk4 file datb of 2hL5 repajj, insight (3e0]0gac. ShwLd be
Swan fhe i)Pp !a 1VV3trW our j-0Wrpreza[ioo35 and rj�Q0jnn cndali.0rts and prod&.
v rium nw4fi dons ar confirmoliciN as appropriaie`
SUBS U RFACE CONO]T1 DNS CAN CHAN G E
This gtotechnical or geo6ogic. ieporn is bored -on ttdition5 t]W tclsted at the tines the
study was prrFarmcd. The findings and cnnclw6ns of this repot# ffmy he affected by the
passage oFtime., ' TROamade events such as cousbWioo on oT adjaceni to ahe site, oQ by
natural events sItels as tlwd-t, eastkquakes, slope irtstabiliity or ground watcTr flo•climflans.
Always oontact InsiSbl Gmalogio I}d= applying s repon to dee mine if it remains
M05T GEOTECHNICAL AND GE0LGGIIZ� i=1NOING-B ARE PROFESSIONAL
OPINIONS
Our mncrprctatjo s of subsurfacc candidons al -e based Ori fold abscrvaticms from
co
widely spad sampling 9 ion -S et the 5itc. 5i -W eXplor$tion identiftcs subsurface
0-onditiomr, Qnly apt Rhone points w smbswFsce cash $rc G"dl5uted or samples ve gake&
Insight GtOlOgic wkvm-d field and laboraEQU dela and thtn applied ouT professiawl
jadgment to rawider oat opinion about $absurfaee conditions ihroughoui the 5ile. Acrual
-5ubF' rf eeMditiaris mar dKer, SWnetimes Si91S3f Cartt1Y, From the iY)dicaiz�d ;n this
Mean- Duv report e(MOLLSIOW and interpr-et$t;ans shnuld not be eowrued f7S a wwTanv
afthe sjubsuTfaGG c jidgns,
GE07ECH N I CAL E NGINEERI N G REPORT RECCFMM ENDAdIG N E ARE
NOT FINAL
Leo rat avcr.,Tcly on the prtlimineey epn9inxijon raDommetidacions iit-chided in this
rept#, These rommmcFWatjojis we riot f3mL, bmmw t}1 were developed princip Jy
from Insight Gaa1o8W5 Professional judpncnt and opinhm- ]nsight Oeolugk's
retornmertdatiors can be finalized oa5iy by dbscrwing actual skthsvrficc canditians rewealed
doting cnnstrmtiGn- Imight Geologic. c4mn-p[ •m5kL cc rasponsibility oF liability far this
repaat'-s rcccYmmen tions if we & rioL perform om9Mffkn obsvvati�on,
Wokm monitoring, testing and eonsu]ntion k)y insight Geok4c s1 w Id be provWad
during mstruetian to co fm�n tbet rho candid ms encouritetad are consistew with tb=
Wicatted by the to pmvWc recmmendations foy demon ch=gea gwuld the:
conditions reveakxi during the w,frk differ from those anticipated. aad to e+ialtLate whelhei
or trot ea&work acivi k2; art complated in accordance with our seoa�rur,en,d�tions,
I N Z I G M T 0E(4LQ-rle. Ib�[,
Retaining It si 4r, fbr cGnstructWn observaiion f0T this projcat is lie Qtost
affective rnethc of msn4" the risks associated with uElon icipated condit6nn5.
A G EOTEGHN IC AL ENG I NE E RI N G OR OE DEOD 1 C R EPORT COU LD BE
S I J EJ ECT TO M ISI NTE RPRETATIO N
MisifrterprWl liom of thils repots by ocher deign teem 331mbam 0H result hl costly
problems. You could frnvei that risk h1i'rinig lnsi& geologic Ponfet with apPMpriatc
memheM of the �Ies* Marg after sUbrnirting the mart, Also Tetaia blsight Grologie to
rYiew pM1irt-i1 elements ofth� d4esigft txarnas plans and specEfEr-at4ms. Contrartws caEl
also i'niSiE]terP=t a EPm1ccl1n1cal engil a ng GYgeologic r0pWL Deduce that risk hty bavitrg
lnsi_* Gwlogic puli-;;ipate in pic-laid and pve*cortstruction confc Tkues, and �y praviding
construction 0b5WV;MJ,1n.
DCS NOT RED RAW THE EX PLCO RATION LOOS
GeoteuhniczJ cngincer-5 M-� geologists Prepare fmal: boring and tr-sdng Ings basil upon
!heir ir,ierpveidi;)n of field logs and labomtory data- To pro -cent crura or omissicns, Lhe
logs included ir1 a p6technical engii7eeriag w gcol0p9ic Mport shokdd never be redr$wrE for
imlklsaon in &ChiW1urJLI or other -des4m drawin". Curly phot rAphie or eleelmnk
repraductin is ac: c lc, but rocognize that separating l,o$s from the report cart el&vate
risk.
GIVE CONTRACTORS A COMPLETE REPORT AND GUIDANCE
Some ow ntrs and ded; 7 prafessiE 215 bcligvs they cais make Oo#ractors liable fom
urt$nbWpat-cd suhsvdace car,d111UEs by limiting wlilit they proyidc fbr bid prCpWation, Tri
help pmevtw costly probl lls, give ciWiractors tape complide gcotmhnacal enowA�rirL, or
geotogir, reP A, hue prehge it with 0 GJe;BrlY vrrittM letter Of mnEsmitwl. 1n that JeAltr,
advise concr-fteL= that; We report wra& not pmpaitd for purposes of laid development a-nd
that the report's w=ra y ea lialiW; enoourape tlhcm to infer with Insight Ccolagicandfor
to coridtpct oddetiOal study to Main khe specific apes of informelioEt Ilk" nomd or pefGr.
A -;;onFertnrc can aI:jo be valt�ohl�. ec sure Wrrtractors Iiavc Fu Le M tirr►G to
peiToi•ErE additional study. Only #herr a-d0t an owncT be 11E a position to give ccmtrwors
litre best i-0fwnna1iQn available, while requiring them #o at lust shire the financial
responsabilkiim ite ing fr= imariticipaatEd ccatditians, fvAher, a conting y for
onarAicipmed ccnditi should be inclined in your p ojec[ bt«i t and scbed•-ole,
CONTRACTORS ARE RESP ONS 113LE FOR SITE SAFETY ON THEIR OWN
CONSTRUCTION PROJECTS
Cour geobecinical recommerrdati(mg Elm not inendled to direct xh-e cou�[t��1ar's
pro ediires, mctJaods, schedule or management of the work sim, The conrrwor is solely
ecsp-a, -Ebk Ryr job Lite safe aDd for managitg emstrudiou opuaticns to min irnile risks
to w-sAe :De3wnnel an -d [o adjacent pmopcnies,
INtiGhT (;EOLOOIc, INC.
DEAD THESE PROVISIONS CLOSELY
Scvnc elimtz. des -19H Wcssi,nwls and contrsotm way not rcco rii2.e that the
geoscien-m pmuticm fg c nilcal J" or 9CoLfl9+) ar-e far less QE tl" nthev
engm=rireg and nawal scieme disciplines- This Jaclk of 'Andergandhas "n mme
tiT&D 96r. "pec#atioas th t could Lead to -disappointments. �Laims and dispkit , Jmjght
Gcolo& includvs these explmnatmy {`limhak Mae prOvisi,orts in our rep<Tt:S t<)hC[p rc C4
such aisles. ]?lease cinfer with h"iot Gcw1gjc if you ars uackar hgw thtft R epaft
Limitations and Guidelincq fur Use" japplu to your pmject ar site,
GEOTECHNICAL, GEOLOGIC AND EWAROMMENiTAL REPORTS SHOULD
NOT BE INTERCHAN IS ED
The agniprtuent, Je6mliques and m-wiintd used iu perfonr, an eYtv3'r0nmc=L study
diff signi fMELTAl f ffm throe Used to pacform a pw ical pr ggo10gi'-. nr4. and vice
versa. T --or lhFLt rayon, a geolechnical a tgineerit4g or geala0c rcpor1 dots nol t5ua11y
mlw4 -any Mirortmenlal findings, eQncluslons -Lw reoorrvrwadatj=', ��-, about the
likelihood of utttcrift� under.vwad stop tanks of regulated ctmtaminanks,
SimiloAY, enviroRmental r-epca is are nut used to address gateahr ical & gco4if. coag ,$
regardiri;� a spcmFr project.
INSIGd4T GEat.V61e, Irk -C.
Ritter ffice/ t lI Development
Soil s Report for Sto rm D rain age P u. rp oses
Site Address. 911 Yelm Avenue 'West, clm WA 99597
TTN; 21724130600
Prepared For; Shea, Cary & JeweJ1, Inc.
21 D2 Carr-Lage Drive SW
Building 14
Olympia, WA 98502
(360) 352-1465
Contact: Amy Head, V.E.
Prepared By- Parnell Engj'neering
10623 Hovers Large S.E.
Olympia, WA 98513
(3 60) 491-3243
Contact: ' HI'am Pwnell_ V.F.
PE
PArCNML ENGINEERING, LLC
WIL EVALUATION FZEPC)RT
PORIA 1: GENERAL SITE INFORMATION
PRGJEGT 11ULE- RILLer Off bEURMil Do
PRGJECT NO.; 0120
PREPARED BY. VV:illl$m parrmil, p. E.
1. SITE ADDRESS OR LEGAL
TPN. 217241301308
SHE E7. 1 OF
DATE, 71ofa
Ue wett, YeArn VVA !q
2. HRUJEt� I PE ORIPTION: Creole new nigmmVcial Cffiee -5 retail budding a`y-rte -Ww h am
NSOCi9E2d improvemenl!&.
3. SJTE DESORlPT1ON: The prat she F4 CuNntfy occup*d by a single r lCJ9--1iisl dweging and
several o4 Wildingt_ NO site ONin�uishbng fezWras were prese11 w4le. $Ile relief is -n"Hy kwal W M
a general overMl Abpe cwxurriN in a negatim gra6ertif from me norbheam to tole &ou Vffl�est. ElevNions
Merytrom a high Crf 346 It. to a 10w of 342 h re5pVJIYG1y. Vegeletion cunsirt-5 of unncroppw flesd brass
graved cover. The p1714120k rile Is bounded try peitiallyr dewlQW prapB ty to the -495t and :smth. yelm
AVenveJZR;510 to the north and Tahome Bau[eward SE to the SOUlh. On-siN jolts are a wU%.drained
Oparaway+ zife$ formed in glacial ouhtiraeh,
4. SUMMARY OF $01LE VL*RK PERFORIVIEC]: Three tesi pilo were excewated by ba khce to a
rmxi*nurm depth & 161' below the existing grade. Soils -were inspWed by entering Ond visually togging
each lesl pit to a doth of loco feet. $C1t beyona four feel were ivy Wed by examin n!2 backhoe
tailings. Falliaig head peruolemion ie is wow 6xnpleteC *172' b0ow rheexl$Ung gree In t.BSL pins #14
:02 and at 84' in test pit M. Test pit sell log data sheets and inhltratfon iesl results are included in this
report,
5. ADUTIONAL SOILS V0DRK RECOMMEFICEt). ,atidilional 8d5 Work shoed flat be D121312ssEdrY
-unless drain IniriltraWn faC468s are located miLside the genera 9roa anowmPassad by IhE sV1 ted!
$, FINDINGS. The NVIoral Re
E�nuroe C0119ermrat[0 di Soil $urea}' Of TfwratQn Counfy mepperf
the Wjortly Of the or+-51Ge '50i1s ae a $p;dnaWay sno Y $ands Loam X112). TYre tmrrap d lost pias
mn?irnwd this designation Pa wimling a 510nY $ rmMley swdyr loam $unfaC.e soil, cverlyrin� a cobbley &
0mvellY Uxatte sand mbstfa4um. Butxstralum E615 Were MgNlyr-n-jo�dersie'xy{ loose with a Retia fi nes
pre8erg as Min rill jaokei& Water i le Was root preseri1 and possible in,dltators were incA -ot?vious. Uue
W the vwy+ coarse texture avid stightly-rnodw.,rhelk E4"e Composition o! 1hi? wbstreturn mir-s, falling
head pe=lakn 112315 aampl t d in ie�% pit 01. ; and * Vol�d infiltrstiQn rad" in ergs U 40 inrhr.
7. RE UMLHDATIONS: The Spanawa-y SII serfgs is a gome •M exoeesly ely drained soil khat
fomwd in glaClal autwaeh. Irdllfradorn rates eri� generddy rapid in thesubsCralum soils. The subsiraILH m
W& shMuld be MNelbd for -p11 dtralnagn infiltration lacililies. A 0--sr!gn inlfdtaftian rarte or 2D inehr or less
In the tiririnity 4d;B11 list pith watAd be appropriate for all targeted C, -horizon soile as remirnmended in the
JAP090 soil IQg irr urrnartion ei,eeeU
-Du►a4g WISIINX4iQnCOM must be taken to pneaent eros1" 6f expo3e4 soirs Oeairmge jacifrLy
WAMr8llor) surfaae3 mml be pmperlyr prioLeCie+d frpQr, CUA mFnekn W the fide -grained upper hoHmn
sails and Fmm campwAlcm byr size ooncirucriGn activities. Soils notf ropertyr PWEEC[ed will Kusa
drainage f�7f iilh'aban faollMles. to prer;Wvrely fail.
hereby cvtffy that i prepar-d this rah, aild tmn&rated or supeTvised the perkirmgnne of related
work. I cerUyr that i aro quaRf p&d Lo -do this mik. I repWel Myr wcwk to be pump%te an aoourale wlthirn
the bou"a of urvArtairfir Inflem*rit rB-"C* cA eels Spence, and to be SUltak for its intended
Ute.
K
81CtirED:
DATE: -Pke
a
. 1,
1k
Al
sw
c1
C2
G3
G1
06
C:0
SOIL EVALUATION REPORT
FORM 2; SOIL LOO INF DRMATI 0N
PROJECT TITLE: Fi r C WR.etail Bewelopmftrrl SHEET. 1 OF 3
PROJECT NO.' 08120 DATE! 7jwm
PREPARED BY, WiMkim Pamell. P.E.
5011, L013: &i
LOCATION- 400 It. south end 100 fl. east Od thq H.V4. pmpe►tyr earner.
i. TYRES OF TEST DONE:
T. MRCS SOILS SERIES:
3. LAND FORM-,
Feting Heed Pereolaiic n
Spangrrar fin} S;aMyt L-oam
Terrace
CdtiMSi
(11�}
1OYR4I6
A. prqPOSITIONF HISTORY:
5. HYOR(11. lO SOIL
6. DEPTH OF SEARAI. :
Olebal otAwtash
GROUP:
Unknmm
WrSa W h
9
-dd5
7. CURRENT WATER
B- DEPTH TO IMPER1fIOUS
9. MISCELLANEOUS:
DEPTH:
LAYER-
Nearly Level
Greatcrffnan Wttlm Of hula
Greatertinen bDMm of hole
ffftR
11). POT>` NTIAL FOR:
E1O5ICM ng4C) Fc(fMIING
Srmgm SkTw Knimal
11. SAIL STRATA DESCRIPTION: Dee Follawng Chari
12. SME PER ATION RATE Sea FSP
1a FFNC11r+rGS e. RECC941 5NUATIONS: AiaWng geed pefWation Iasi -CompGetgcl M 72" bar the
exlwJr* grao. ylewlw m �rimrakiCwi We -of 72 in;hr. Use a design lntllti�Mon rale of 2-0 inf-hr or bass for
Mm draina2e irrfiltr0on facalibes looted in the C3, C4 and �,$ horizon WI&
Soils Strata a-ps-criptibn
TRA
4r- 24-
10 WO 1
s1satm
24'- W
1IM'J'3
SISbLM
3W- 4T
10YRW
CdtiMSi
46'- bra'
1OYR4I6
VGr$CrbCSa
56 --IDT
1DYFWI
VGr$C4bCZa
10'.1215'
1 DY R - U2
WrSa W h
�4
-dd5
1w am
ja"t
12T-$44'
I OYR5;1
VGAQ3b2Sa
14414",
ffftR
r*): it •e wHrt
Irvin ML
jaaela
Soils Strata a-ps-criptibn
MOT IND CEM ROO
:�29 }4D
- - :-2D }dD
x2 - rt65 SG - _ - }24 PAD
i4 , C-95 - - - - }z4 X40
rlzo
Gr
X12
-c3D
Gr
- X36
SC
�5:5
5C
rt54
SG
�4
-dd5
SG
MOT IND CEM ROO
:�29 }4D
- - :-2D }dD
x2 - rt65 SG - _ - }24 PAD
i4 , C-95 - - - - }z4 X40
SOIL EVALUATION REPORT
FORM 2; 5 QJ L LOG IN FORMATro N
F KUJtt: I I I I Lt=: Hitler UNice; F- etail !Development SHEET: 2 OF $
PROJECT NO.: 01512D DATE.- 7J7=
PREPALR-2v 8Y: VVilliigrn Pamell, P.M.
SAIL LOG' #2
LOCATION. 430 ft. souilh and 220ft. Feet of Me N.W. propeiyy vrner
1. TYMS OF TEST DONE:
2- H RCS SOI LS SERlES:
$. SAND FORM:
Failing Mead peroolmon
SpenEmyr StonSandy errs
Terrace
€KGrc&3
{15
45 0310 iG.-
4. DEPOSI IUN HISTORY:
5. HYDROLOGIC SOIL
LFPt F� OF SEASONAL HW:
a3�Gl uAwash
OR0I,112:
UnKgcwn
rtl
B
7. CLlRREtdT WATFR
I Q. DEPTH TO IIVIPEAVIOU1
S. MISCELLANEOM
DEPTH:
LAYER:
"Bady I%eVel
Grwlei than but4m aff I -Ole
Great -pr lhart bollorn. of hole
*Qpw stom
14. POTENTIAL FOR:
ER05101,1
RkiNOFF
PM[NhrG
5ligdlt
8Iow
Minirrml
11 SOIL TRf%TA DESCRIPTION, Se-RrcllowipV #orf
12 SITE PERCOLATION RATE: 1�P
13- FINDINGS & IRECOMMENDATIONG. A falling head perecdabon b"t oo�pletwf ad 72" 1�eIur1he
axidhig grade *Icred an irlf lllf on rale greeter lhpn 104 In?hr. Ost -a design inliltralm fate of 20 iaft
or less for st-Drrn drainage lKiiltration farAities kac%ed In the C hcfizon sails.
$oils Strata Qcscrrpclorn
f�Ipr
7g8x-re
A
T. 17,
1 O%fRwz
515sLni
c1
f7'• 39`
1OYR3f6
€KGrc&3
{15
45 0310 iG.-
f' m
s tm*
C2
35r- "I
IOYR4x
rhe. sarft
rtl
;5,t` 5
sw ne S
C3
44,-R,
10YRI&
Ev3r&Q p,
:go SG
*Qpw stom
i�A
W-1 Do,
1 OYR wl
E)rbr&Cob
G5a, dew
iMmncs
1€ .1!mr
10YR5f1
E�GrS6, Frey
3L ms
$oils Strata Qcscrrpclorn
Soil I-Qg
K L
{ F STIP FJI�
±!Q LE!4 RQQ LX2
E"
{15
45 0310 iG.-
f' m
2
-Q
ego sc.,
X20
}243
rtl
;5,t` 5
qq
eesi;
:go SG
x
-35 S-�
}�U
SOIL EVALUATION REPORT
FORM 2: 80�L LOG INFORMATION
PI T TCTL E: Rfbl 00im?Rstpil opr n! — - '
SKEET- OF 3
PRCUEC-F FSO_: 0812(
DATE: T�{Jip1B
PREPARES BY: Wilfiam Farmll. P.E
SOIL LOG: JL3
LOCATJOI+I: 260 fi. Soulh of 1he N W Properly �drnt .
1. TYPES Of= TE:�,T DONE:42.
NRS$ SOILS SERIES:
�LAND FORM-
Failing Head Percal�1i�G$riawey
StonySandy Loigm
Terr�oe4_
a PO 171Df�1 HIST FAYDEPTH
OF SEASOHAL HVU:
lacial 0s Wash
ROUP;
Unknown
7. CURJENTINATER
;5DEPTH TG Ih1t}EI V10tIS
9. MI$CELLANEOUS-
DEPTH;
LAYEFk;
fvl��rly L�
Grader khap b*Hfm of hole
G malef Man hoi[om -of f'iole
��. TENTIAL FOR:
ERO51? hp
RVROFF FICHDIN
igFrl
Slaw Mirrornal
�
11. SOIL STRATA VESCRIPTEW- See FvilahMn� chart
12. SITE P'ERCOI�ATION RAT.E; See FSP
13. FINDINGS & kECOfd MENDATKWB: A lin ing hezo p on test Gompdekt[I ai J4' helaw tyre
ex.Jsling ora de yielded an inflirradonr-2itegreatertImn ipQ a15Ru. U} e e derign infilkraklrm rale O irlrhr
.�0
k*�, for Morra praMagtt, infiMrallon faoiWiez loomed in the C horizon %Oils.
So115 Strata QescriFption
Solt Log 4�
1: l0rr Thi 1 {; : ° QTR mOT !ND C�U Zoo
A
QF- 20` 10M1'R $1C*Lm -75 t �3b [#� f�
2-6 2
3fr 1CYROfYi 1+11`$,C' 3 v2 KBS SG
e ones
C2
87' iOYP.& s r=Aar !30 x1 SG .
] =40
C11
97'-t18' 14VRV2 aGresa- -<3 -egj 56 _
k24 4i]
xiLh Thin sill
ilbt*bt5
WNW Exl3rC5o. -Cl COD SG -
A21) =44
Abbraviatio s
Textu re I Cl ass
Textu r$
Struc;tu re
G riades of Structure
Cobbh
JSTIR
-Cob
ranular
- Qr
Modeyale -2—
Weak - 1
Stoney - St Blocky Blky.
Gravelly
raaell - Gr pl—iRty pi
Sanoy a Massage - — -
Loarny Lrn Bingle Grained -So
-silty
C lam
Si
CI
Sub -Angular Block � SOK
-
L.
VM v
Extremely
- Ex
Fine --F
1 lkadium
- fel
Ind oration & Cem a nWi-On
_veak Wk —
Moder�_-ic -Mod _ ..
Strong - Str
Mottles NOT
I Letter Abundance
Fe F
Common - C,
NES n� - IVI
R-oots (F OO)
_1 st Letter Abu nuance
F -f
Common - c
Many - rn
1 at Number Size
Firms - 1
ium .2
Coarse -3
2rn d Letter Contrast
Fa Int - F
Disfin - D
Prominent - R
2nd Letter Size
Fine - I
Medium -rn
wase -c
<A> - uenerwizea range of intiltratiorn rates from c soil survey (.<x;,)
FSP - EstImaled Field Saturated Percolation rate hasW -arr horizon spw fic
factors-
FaJ I Eng Head Percolation Test
Ritter OfficelRetall Deve lopimant
Test Date - 7842005
Completed By: William Parnell, PS
PF Job - #D8120
Tesl Hale # 1 (wrnpleted 72" Below OX-16ting gTound surface)
start
Stop
Elapwd Time
Total Drop Infiltralign Rate
Mirr ?
(Min)
( Min
{ Inches Ir7Mr
D: 00' 00"
0: 52' 00"
5: 02' O0"
6
a: 02' 15"
0: 04' 45"
()a' 4511.
0: 02` 35"
D3' 1V"
6
6
09'00"
12' 301,
6
�0:
�0:
�3(Yl
0:30, 00"
D. 39' .20"
uoakin ri
Peod
�
01 32'W"
�y jQ �]J'j
V. 36' 3D"
0. ' 3G'
0: 45'09'
'
D: 46 301
S: OT 30"
. 45' OD".
0-49-45"
0.04' 45"
720
1- OD' Ou,
1: 05' 0D*
oaks Pa - d
0: 95'00" 1
$
Soerkl g Period
1= 1;Y OT
1: To, 0OF
00"
712
Test Hale# 2 {Completed 9 72" b4o'w exFsting clraund Surface I
Star#
!o
ala s@d Tim
Taal Drop Infiltration Rete
mirk }
Min }
Pilin
Inches I NHr
0�
0. OD' 15"
0-.001 is"
0
D: 00' 30"
0: 01' 00''
0; 00' 45"
D. 01 1!5"
0: 00" 15"
1 D.
6
-SoakingPeriod
0: 15'0011
D. 16 20"
0:30, 00"
D. 39' .20"
Sna-kingPer-Od
D; 07 20"
�
ciinkI it PeNod
0: 45'09'
'
D: 46 301
S: OT 30"
1-0010--1
100' 30"
Soakl-ng Period
Cr DO'
720
Hole, All tests + erq? comp lelad with :9 6" pVC solid walled pipe to pr TA sr'dewa I€ ❑Dllap .
Falling Head Pereolntkm Tsst
RIM Off irPJR-eteiI Development
Test Date :7f712008
complaled By; mmem Pameli, P.E.
PE Job : #08120
Test Hole # I (coiner a @ 84" below exiting ground space
Start
Stop
EIS sed Time
70l:ar Drop Infiitralip.rk Rate
Miry)
Min
(Min)
InGbes ln;Hr
0: W W,
0' 01'
0: 01' 3Y"
: U3' 15"
0: , 0
0' OT 00"
-D: 04' 45"
0'Q"
01' $06
G: 01' 3cr
0: 01' 3c'
-Soaki; I Pere-od
:6
-
6
0: 16
O; 16' 30.
G: 01' 31y,
6
SOalfGjj Pe-Ti-od
.0: 45' 00+"
O: 4700"
-Soaking-SDaking Period
0:.02' -D0Y'
6
W o
,�oa}kiJr�a jPSeri �d
G
Note: All testa were complebm with a 6" PVC !SQlid walled pipe to preve rit side wall ml.lapse
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APPENDIX A-$ -
DRAFT MAI NTAN ENCE AGREEMENT
I
COMMERCIAL W)USTRIAL j
AGREEMENT TO MAINTAIN!
5TORIVIWATER FACILITIES AND TO IMVLEMENT A
i POL LUTIO N SOB CE G 0 AIT ROL PLAN
BY AND BETWEEN I
ITS HEIRS. SUCCESSORS, OR "SIGNS
(HEREINAFTER 22 ")
The upkeep and maintenance of skerrnwater facilities and lh,e implementAti4rn of
j pallution &oures oontml gest management pw*e:5. (€3MPs) is essential to the protec.lor1
j of water resources. All prop6rly Qwners are expected to ooradwrl bu6rm s in a m$rwner
t t pr vte!E�environrnenlal protection. This Ag mi-, ment cx-ntains speeiific prowi-si-on5
with respect to mairi,eri a nre of stc rr nwamr facilltle$ and U se of poll utio n source oantrol
Bf�1Ps.
LEGAL DE CRIP'TION:
i Wherem, Susinesrs NaireJQwgiertt.a;5 Pvn$Iructed improvernenK ineWing but
not limited to, buildi"s., pavement, and storm water facilities on the grope y described
i aboDye. la order to furtF r the goals of ftJurisdiction to ensure the protection ar+d
enFvancamenr of ,luriwiction's water resources, the JurlsdicUori end Qusiness
NameiOwner hereby anier into chis Agreement. The resp'onsibiUties of each parry to;1 is
Agreement are identified below.
BUSINESS NAAIII=?C3Pjr-R SHALL
Ian plemeat the storrrywaket facility maintenance, program included herein as
Attachment ..A „
Implernerrt the poll rition sore control program lncludi2d herMrl M AttaChlft6rNt j
11 13. A
r
r
t
P) Maintain a record (In ft form of a log book) of slepe taken to irnplemeM IIS
programs re eFenced to (i) and (2) above- The log box* shall be avakIlable for
�...... . ......_.._...._._............._.._._....--- -
! inwection by Jurisdiction staff at 04dEpas during normal business
hours. The log book rholl �-,atatog the acion taker,, who took it, when it was
Ow, how Gt was done, and arcy Mblems encountered or foHow{,n acticPas
recommended. Maintenance iterns ("problems") listed in Attachfrnent `A'' shall be I
! insp ted on a monthly or more fr$quent basis as rreoessary. B usirwss
NaraeJO ner is a Coulaged tD photocopy the ifiiWidual r1hecklisis in Attachment
i A and use therm to complete its rnonihly inspecii m. Ther@ completed checklists
would #hen, in combination, cornprise the morttbly fog took.
(4) Submit an an n ual repot tb the Jurisdiction regard ing implernenlaVon of tl�e
programs referenced in (1) and (2) above. The report must be submitted on Or
before May 15 of each calemlar year and shall contain, at a minimum, the
following=
I (a) Name. addram ar+0 telephone number of the business. the person. or the
firm responsible for plan impleinontatiorf, and the person completing the
report,
M Time perm covered by the report.
(o) A -�h ronolggiva I summary of aclivities Gonducled to im plerrie r� the programs I
referan d in f 1 ? and (2� at e. A photocopy of the a pplicabla seri ions 1�f
the ft book, with any additional explanative needed. shawl normally suffice.
FOT any a-ctivili;es -conducted by paid parties not affillatE)d wi:th.Qy5iT&ss
Nlamef nar, include i� copy of the invoice for servioas-
' (d) An outlirre of planned activilies for the naxL year.
'THE J U R I SDI CTION S HALL:
(1) Provitdo teohnical assistance to Business Narne0wrker in suppocl of its, opereticm
and mainte nanca actiaitle6 conducted pursuant to its mai rftenan-ce and source
centro] programs. Said assi:5tance aall be prodded upon request, and as
Jurisdiction time and resources permil, at no charge t4 Brisoness Kelme rrner.
(2) Rei ifuw the annual re pDrL and cor'W O -a minimum of one (1) site 4isrt per year to
discuss performance and problems with Business fdamelO wner. =
(3) Raviaw this aqr r ono with loess Name +ner and modify it as ne sary at
bast once every throe ) years.
I R F_ 41EDIE:5:
(1) If the Jurisdiction determines that mainlerfance. or repair week is required to be
dine to the -9torr-cwater facility existing on the Gutsiness N ameiOwner property.
the Amisdicliarl shell give the owner of the prdpedy within which the drairiage
fa614 iS IOC2ted. and the p01`8or ageril in =Aril of said prep41y, nclice of the
...... -.....__._._.._._._._._._._._._._._._.__._._._.__-.__._._._.._..._._._.
............................ --.,_.....,.e,....,.....,..,.,�,_.. .... -- - -- -
:gpacrfc rnalnlenance andfor repair required The ,Jurisdiction shall Set $
reasonable time in which !uch work is to he cornpbeted by the persons who were
given nohice. If the above MgWred maintenance andlor repair is not ownpleled
within the time set by the J urisdiction, written notice will be saint to the persons
who were given nch�ce stating the ,Jurisdiclion's intention to perform such
maintenance and hill the Owner for all incurred expenses. 'The Jurisdiction may
also revoke stormwater util!ily rate credits fPr the quality component or invoke
suri�tar les to querdityr component of the Business ma! oy ieT hill if
required maintenance is not perforated.
(2� If at any time the Jurisdiction determines lhart the existing sys.1 Wn cmate!5 any
Imminent threat to public health or welfare, th E� JWFiAwdirtico may take immediate i
measures Mo rernlyr said think. No natice to the persona listed iri �1), above,
shall be required under such circumstances.
(3) 71 -be owner grants u nresifficted authority to the Jurisdidion for aocess to any and
all sbrmwater system features foT the purpc of perfDrming maintenan-ce or
mpalr as may t�ewme necessary under Remedies (1) arwVor
(4) The persons Eisted in (1), abova, sham eesvme all responsibility for the cost cf any .
1`11einteri rmru and fgT repairs 11:9 the stormwater facility}. Such respon:sjUlity shail
include reimbursement lo the Judsdictiori within 3i} days of the reoeipt of the
Moine for aAy+ such work performed. Overdue pL"menl,5 uviFl require payment of
interest at the auTrent legal rate for Itquidated judgments. If legal action ertsues,
any oasts or fees incurred by the Jurisdielborr will be borne by the parties
resportstble for said reimbursements.
(5) The owner hersby -grants to the JurisdIatiorl 81 lien against the above•descri ted
property in art arnount equal to the cost inourfed I the J uriiudicbon to per m
the m aintenanae or repair work desnibed hemin.
This Agnaejyent is in%nded to pr*te the venae and desirability of the real properly
described above and to benefit all the citiaerks of the J urisdrelron. ll ahell run with the
land Brut be binding on eIF parties having or acquiring from Business NamelOwner or
their sa_eccessors any right, title, ar Inlemst in the property or any part thereof, as well as
ftp lr WIC, or irntereal rrr the pfapeTty or any part thereof. as wall as their hairs,
successors, and assigns. T yr thol I inure to the benefit of each preseryt or future
successor in interest of said property or any part thti ef, & int-amgt thtiernin. and to th i�
benefit of sill oitizens of the Jurisdiction.
Owner
I
I
Owner
f1
_............. _......... ................ ...... ......... ............
,.�r.,..,..�.—
STATE OF WASHINGTON
C OUNTY OF T H U RSTON �
Orr thin day and year above PE�ir:5-onuilly appeared before rr7e_
and kn�mn to be th-9 1-ndiv'idwa1(5) desQri bed, and who executed
the Eomg6nq instrument and acknowledge that they signed the same as their free and
'woEuntary act anti deed For the uses and purpo5e!3 therein Twntiorw�a
Given under rnp hand and official seal this day -of , 20
a
Notary Public in :and for the
i
Stale of Washingwn. rewding in ;
i Mir CcirnmMsiop expires -
S -'ATF: OF WASHINGTON �
C 0 UHTY OF 7 HURSTON j
On chis day and year above personally appeared bei me.
who-emculed the foregaing instrum@n4 arid edriow"e the said
instrurnerit to be the free and volunlary &Ct and deed oP said Municipal CorporaOon Eer
the uses and purposes kheFei n mentioned and on -oath 'akeles he is authorized to execute
the said inslrurnent.
3
Given Under rnti hand ar,d AwW seal this day of 20
a
Notary Public in and for lin$
i Stale of WashirLgton_ residing in
My commission expires:
I APPROVED AS TO FORM,
i
THE M?.MENANCE AURETMINT
I. Select the cOIT&; t 4yp-r ofMaiiltewkwc Agraemcnl (residentijil or em m rrcbal).
2_ h1clude the "Inst uctim Fx)r hereon mo -o la -ring SLOrmwater Sy tem" sheet.
_ liYelndo 1 -he Attaolima t "A" Qoya
sheer-
. Include artEy tlsDrnai3LcuawE �]iats that aI PIY (e.g., if�t#rmwXer system includes a
pond, pmvide pond checklist)_
Foy resiitcn6a,l projects, include a copy -of''R.esidential Best Managenjant prookm," fram
the Slormmwer Program Garth nceuqd, ����rrre f!, DeparfrrEent al' Foology, July
L 992_ This provides �ourc� coab-�o�_
.'FOr camr�imtallindustrial proaectq t„ dude the aP n)PTiatc scarce-Cmtrol langane fry,
kaJcrxm IG, Urban Land UAL- BMTs, Stomvvatv, managanwog majTzrajfor jh&puget
Srju cC Dcpartmea of CWtogy, Fehruar� 1992,
NOTE. The folbwing is :an gaample of what the VIlutia,t SUurce zontrol pmgrain fall- a
retail Nture would look like. Yoii are req ulrW to develoR va-uY awn rn ra n9.
failored to your [Mlle of bushiest, using the informatlart available in Vulu tile LSF Uf
the DepaFtmep,t of `Ecology Storm Power A4an md-
POLL TION SOMCE CONTRO 1, PRS GP AkM
HAT ARE POLLUTION SOURCE CONTROLS, AND WHY ARE THEY NUDED?
P01 utiOn sOurov Matuls arc actions laken by A persm or business w reduce the arrml2t of
poHution ruck 0.9 Surface and ground waters. Contmisti al.z Wlupi "best i=gm"t practices"
(RmpI )F inuludc:
A ltet'ing the activi ty (c_Z,, substidste non-toxic products, recused oil, mwic flog
drains 10 sarntary sewer kOrn stUEM sewer)
# EndOsdAg of Uvea-ing thr activity { - ., bVilding a roof)
5;e.9t ti tk ar-tMty {e.g., divcrfliug runoff away from an arra that is contfflrrinated)
ROLA629 TUnOfi'' ini-om the actiVity to a treatment al LeMti vC (G -g-, t4 s wastC'Watef treatment
fk6lity, sinitar'} sewer, or SGOrmwaMr treatm,ertt area)
Po] lution source centrals am rwc-dc d because or the omaminatilan found in nmotT from
commercial areas and ft effect Df this costa-minatic n an aquatic fife and humaA health. Rescarch
on urban runMt irx tic Pugct Sound area and c€scwhem has found oil and gn-wr, nutrients,
organic, s+tbstances, toxic metals cteriaF viruws, and sediTrwOb at kirwkmptable level. E.ff is
of corvtaminawd runoi); is ju& closure of shel €fi and sup itntning arrab, Multality
of ycutg fL-,h and other Nwtic organisms tumom on fish, and impair ent of fish wprDductiojti,
JV -2.3A RETAIL GENEPSL MERCHANDISE
OENERAL DE CR1PTlUK This roup in,cWes general mcrc�hadising stores such as
deprtmentswm, sh ping malls, variety stores4 24-hotrr ci)rnvenienm stares, and general mail
atvres that focus on a few produce types such as clotharg end shacs. Ir also includes furniture and
appliance stages_
1VIM-HRIA1 USW AND WA,91FS GBIERATED: Of lxarticular conoartt oro the parking lGts
of shopping malls and 24-h= oonvzm-enx stores. Baca uw of hcwvy vehicle usage, thz
Cmcentratico of €ril and grease i n stmwrater mAy exceed tTie Ecology guidelines of 10 rn jgf 1 _
Although there are no focal &1a to confum this vier, limiters re tamtk in the. SMn Franc -IME) Bay
arca f0ufli the TN m) 071"n"tiGn 4f oil and mast? tui stortttwMOT 0 oxcdcd 10 mgt 1: LargeT
INSTRUCTFOI
Th -c following pages conmin "iniamnce needs for most of -the a nponents d'00re part of y-jur
drainage system, as well as fur some compuncnts that u may riot h Let LL� knave iftbcrz are
ahy-WMpor)enTs That aro rnissiit4 from these pages_ �gnxc� the r-cquir ats that do tint $pp1� to
y0or system. You should plan to oomptete a ch khst fbr all sy&tem eorap-anats ga The follywirtg
schedule-.
M MonthlY from Novemhcr through April -
(2) Once in 12ta r'ummcr (preferably Septrznnber),
(3) Aft any major sT fuzee 1 -inch in 24 houm as a guidellnc), imm mark6d "S" only_
Using PhotMPIM Of lhvse paw z, chew MT the problems yL?Le lookmi fw each timo you di -d an
impeetion- Add wmrneuts on prablems f;)urd and actions bktn. Keep these "chrw d" sleet$ in
Our files, .Ar, they wall be used to w itc yow annual report (Ac in May). Some itcrm do not ne-od
t# bO 100kPd at every time an IPP-pcc#icLa ir. done- U trio suggested frogaenq at the ]ell of each
item as a gwdetinae for your iaspection-
You mayr cali theaudsdictii)tL for k hnioal assLstaiec, Plcasc do not imitate to calL especially if
you am unsure whether a si#tiation u nava d6mvcmd may be a Mblu,
ATTACHMENT "A"; MAINTENANCE PROGRAM
CCVFR SHBET
Nwnbor of Sh,cts Attached-.
Date trspezted, —
Name o€' Inspector_
InspwEoes Signature
ATTACHMENT "A"' MAINTENANCE- PROGRAM
Mai nt-enance Checklist fQT Closed aelention Systems (Pipes,+Tanks)
A-Annwl (VmrchwApilr+reayro*
M ■ N1crah;Y Cim sclred,,lt)
$�Mwmajorsiorrr&
b, x3s3�ge
F
na7�
FrwmG
Prohlem
174rv-'kiuns•Lo
Cksk Tor
CA)Wians Flue
ShOl Rxisl
H
w
I'luued sir
0-1141d aPiku and rua of a uerx is Uoc:ked,I
ve•rm fray oddebw'+ed Ndirnu�
WC4
wt3x�,
any pmuwirll ddUiswA3rdirr&m. fhjiWpj
(i^Jr Ill
(cmdl ISPV
3xnl Zan «uss slorapr arca to ci:llap*-
�al
,:tam+x I s
smith 4osirt
Lo sbxarp
I
L?clx +IKI
l�r+eurr bltd �:GdiffKw cieprh 15% of
u.i detris r' lI11"u-i i m siao�!
rs :nl
�,7nis9Cr Z5curi,I�'n-inthgsgyfipe Iwkwnol:l
4rc3L CMMICilp hK:c Wojks fb¢rui-uncc
r"iry-Jcaning Wkfl * F1mm reachcszlgmb of
N$ m mart rern0YjI rrgl dw.:M1.
I � indwz.
A
Juinls
Any crxdkOwing muerirl Ip ICA inla rn¢ib.ty
All Jpupsbetwmn Lu&; R-4iunsarc setled.
btilwees7
1 {c Opc
9[ ti iM
A
l'iuikfpip:
ArryP-Lr:Yr,nkip i" i5T"im_ab5wNrf WRuf
Tank-pgx,rmIr-tuareepI2crd rn:l:•: :i
hciil 0111 orf
zhLpt
C'ar.I:acr.^. p0Fk ssiunal cnginam k:o ...: I���I..:•
ziu r
1.S
-fanho.e
l'ejvzr rrc4 in
C-l-,-aaissingflron:yraniarbraplacs r17r}'
NI—Fulu:c{lucd.
o K n m4irhole xecp m! c-6 macrrknwcc.
Loa:nr
Rn!Udsm carryx ix VP; by one
Mmlrbnism urns uuh pcpl�_ Iuals.
Kr-La.�.;4e&
m2icke7AnccperWwirbpnupmlvol5. Iso-!is
- K 1kinl:
inln framcLiaeIria Own 12•irwiof ihread
f F AMY 10ulfk<ki lids).
Co— em h* unwed and mimiollol by Lilr
Colvr
ikvC M;jiulsnamx pu*m c*rr:# rqxratie .i5 afhcr
di Ifrculr iso
applying &d peer it AMR. Intern is Io "p
Au:Nrmnm 7rsan
1!121fiC
cOyCr*E91 Lrrea 9Q1: arcim to mainIenenet.
ls;xr `dairrlrwrrce pereoc jt rhen IwIgW is unsafe LA11-os mr d Llcailm sier.c�3rdr .-gvd anllu5
rLr.F Lr--%:kk 4ae la missing rung, "lrMr.rnr7rl. rte{ or 111WI;mnu -croons safe: nccts-
crau�c�
I' y ---Age wmlhcj st rAOwxIn -mixM plrsazc orrnubcl Ihr 1;;rHis;ion and ask rbr Ixhrrit.! m"iN�z:e.
4't�r• �cuLs:
A-Annwl (VmrchwApilr+reayro*
M ■ N1crah;Y Cim sclred,,lt)
$�Mwmajorsiorrr&
ATTACHMENT nAn 'CONTINUED)
Maintenance Cheddiat for Confrol Structureflow RaWrictor
(str ctu re that contmis rate at which wat-er exits favi lrky)
2ryw ire LYcWe ir1icavT * pabirm eaisu. plsyst annurcl the NiWiulian ar,d ast fnr Dxhnk{$L xmWmpp u
1.b1INMnu:
Kuy
A ^ Anmp l {MWL-lh or April preferred?
WxfWy W%2 schedrft)
`�� idlernyajorb�+7❑
r]ninW
S?sh rs
condilimrs r -n
F L' •Kr4�'
�2i�Ve
roAvu:
cua I frr
Wfuld ramal
:%I
I]i— WAT%m dchrx hu[ Rmp &rrd boakm d
All rr&th and aI-bni rm n%-g'il.
duhrs
t ifdcplprl; If kh than 3 L feel.
�cdlmmS�
wrnuLcnl
$huctwe is mx wwrCIp rqa ImLL lu Inonhnk
4#ruehrre wcvrclk d+mChvj W W all and oxc1-[
�r+rt!F
—II and whir pips; uuKrrc shmjld supprnl .q
pipe.
_rte 1,0 11 inLU 43FLLp or dawn prrLwlt,
L
5+nvMm is not invpHShi 3-M iIiun (:3 uP 4a
Sorukft s ;-ncarmi pcmninfi
—
10% rrom 6
1a1�H4I i*M 4oauliel pipe arcs" u lwbih1 wA
t%lnwGoas to - ullol pipe arc wol!niw:
ih0y� ii um ornut
910—n1 re, repaired -nr rrplao2d .:ro w4�Iki as
Any halr�whrr *— Asaipvd holm -in Ac
5h1wourr has W hj-53c9 (WIi-r IIiPo drSigF{&
s=cum.
10!3%
m L�
or
(1)"now plG u nrl --atarliglf. or o. rr.iinny;
Gate is nu -rd PJII W m*rk# 43 dmi�rcc.
Dale
}
[gin-wumIba Irmedupand 1,,}'uN
Gott -o% ulptrid doanmn*andis
m ++-ft nanrc VW.
nroI
Clizim le3ding h, Luicz;Vnimin tafain 1
d,:hwck aia pkrze and %wksai&:xi bind
CUhe4nlsWOir9(r%ofilssurfxe yes.
Qdles[ red or
['p�I [ r4 n;c:2 -Lk-y:4r,
sC.indxr3s.
kf.5
CbmrWiG%
MYftzah.&bnk4 7i:tid_ur+rg0Aion
P10:e1sT1t=uiAIr udb[msandWMhM
hIockin n the rg roe.
4-�i ;nrlL
'kf-S
S7V[rlhow
DbATuclions
A -W -W1 ov06ris bkrr"gforh[Ati *p;
hiprisfroeoffal! WW mvkS*G
1imll ufb!DckinSj the rncrllriw lLmq,
dpi
2ryw ire LYcWe ir1icavT * pabirm eaisu. plsyst annurcl the NiWiulian ar,d ast fnr Dxhnk{$L xmWmpp u
1.b1INMnu:
Kuy
A ^ Anmp l {MWL-lh or April preferred?
WxfWy W%2 schedrft)
`�� idlernyajorb�+7❑
ATTACH MENT IIA" (CONTINUED)
Malmenance Chw,%list for Ca€ch Basins and rnlets
rFy u we umpt ubflher u problem exit pimst canhrc, Iht hx;wli tW And ask bf mkrmal �csi#rte
crmsWeAd:
Ka
A - Amml tfF7r+rrb Gf..1 ri1 PmFemA)
M "Mr nnihlp (%Le srhu:uft)
S-AlkrGnajorsaerli
❑rt�s�c
f �fi• ��
eatlne
Ffablmm
tb:rrlu,v�'1'
i~h&& Rw
�andilr..4 Thx
MOM aist
i'd.S
Cw-mral
Ymsh. debrle.
l•,ash cr aeG:it in aunt of atisc wua4
Nj 1wh or dehrii IuraleC =aredimiry in. Aaru
-AWi;hwL
Opmmh--�b1mkF%T :Ay�yfrt2ol rham:D%
Gfca: h Main operYct 1�1ie53iacpirlcsmw1d
in or on home
rllo-r.a -0t to cmc,
&Ahn¢d a 4OWiaa (in Lhr: hnsin) dni ex�zfi
v0:mlim:ne & &&js; in ih- b,icb twin, f'MP•h
I ]the depulroomrhebottomoPWiA9dirvct
It— isdll-eemjr.dGlean.
8f the I pub i nio n r out od il= baci r.
.i rah of debris in an i
Yn�eI 4r FRG bkxkins
Inier and alp, pipet Frrc of trash or u•��::k
ry:N=lhrmWofits hci r.
Uvct�l
Cumerof &arm emmi% rYrb d an -w wch p�"•
Front is O h %-iih curb
danlr_gt Io
M6 farairdnih. # iiiapplrcabl4
frank an :fir
nxa f'sh
I'r# sob hp�- W.:s larger iron I "ri; irrrhes ar
700 tbl- is face Oeltcl- a-rI -www.
erect . uioer dun lid -ia{h (mlzmI itr to fab!
sultiallmmr ri.aI �9dyAnir v,iretalhe basin).
M
Fi.,n42"�LtlingGushqmgapSLG, i,&,
Fripw is•siltingflrr hcrI slab
sepmAirm of font dm 3A7 iftih of Khe Eww
rrovn 4 b I ppsld�
A
�'t+ck} +
CmrJa xiduff man P2 im h and longer f4pn }
8 m I&N2- pd m repxi:M m das10r, bWnd;mis.
hiisin
fix r. ary Cvilmr4 -Prsoil paRYIes I!nwih2 arc&
Com7CI a gorm kymr rrgirx IV 0'*11.. ion
w.!.%�)
basin I1 -W er*kr,orTnKD cnusot pow n
UriR stn�Fvrt if mscun1l
ft
C'j--ki-idcrLhan W indhond k:frr'34n Y
NO crud mutt (hart No irel:,e-mk#i :ct ;miji
ivas u rt joinL dant' inreuaudoq pip:&qyr any
of Inl;e r pipt•
M*4?v. vr"I) Fa rr1cICS _1 ni'S riR G*Isk b�
&-u licm ks.
Seak:rr :::
Eosin hu stnlo more Ihxn t inch or bus fsjuiW
basin mpleani or aNireh Io dC.y�p sa7nd"
+rlfJ =-rnl
marc Ih-': #CIw•s ou[ ad al' _ nL
Comma oAmwmal en ineer far cuclulirmr.
M.S
Virc hamxd ar
Fr"nzc or thein uL Ram k nXrMl jos, rri1.
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ctkr
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alai.
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rK&-d_
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90 vtAgmif:n os mK. :Vumh psecem.
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_.
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M "Mr nnihlp (%Le srhu:uft)
S-AlkrGnajorsaerli
ATTACHMENT "AIF (CONTINUED)
P,t';DIWPn-9m:e, : reckli!�t for InfMration Systerns
frsgl,tae}
G_aiuxy,K
S sx 1i11%Jnr
PrfiGk���
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klisl far Pmt
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"get3lion
rds
i.S
I:ire KPUM OF
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154
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srnhn r bum msluffu!IiFy lnl
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J
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ByMisual 1=rpr6m2iIiMarn0v6nI
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&
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If yaa art unsurt %hc tr a pr nhkm aL�sik pkax ovaijem 1Ii Ju+d+diGi m and ask Prx IechOital 2ssishmo-
A-+5nnual�MUreh-�r AyTi lRrtfrm�-d3
hl - WoLdily (zee sr].I¢]
S - after mem ,roans
ATTACHMENT "A" (CONTINUED)
Maintenance Ch ecklist for Canvoyance System (Pipes. Ditches, and Swal es)
F7711
Drainage
yslrr 3%t: I
Uhlr�
Cend9iaus Io �.�LF-A
��xr�JatirQuTkal SMuld Fxir1
X1,5
2' o
diAiiri J4
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chleo EA ¢fall sedinrtrc arrJ icbrrs
dkbris
dimm�rfq of1he pi
V
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lin!I rCauutiIed so WM= P;+hs
�x I
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pralcclin ewin u is d. myisd, nul is tao Kl r
more 1W M%&-1MixaXiDn MA" pmL yr
MPt rep ir A ft wrluxd.
hrw dmW ohu s fl,eH!oy Avmm now fie..
r1r1; mired or repls::,al
dcmw s & brxA StrLa #a1.Vr pia by
Iiwrc Ih*h 1.
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y�br{m
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Smlion.
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A
Rock lining out
M•rh6c F ,r,: n can scc nad-,r soiJ bu tnh
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rpwwi Ihu 6waIr area ht 2eswmed.
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umud Ci to rcpcA p ubWm ,Pr1r.1
mimed w�u►saril .
•
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drain
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A SIIr51ey riby Wi}bWcA ap en# L:�% rk•,
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ibk. Iff iEIMftn
6a $a; w rrw neod 4o bc; inalRfl-d
b YCO *x cure nre whyh fi, a pmblvm exi!J:L please roman the Juripdiclmn rp¢ wk for kdTrL"l esisieerae.
A m ArLnurL iierch Dr hpri,] prre4ft4]
M =ir MU6Y rMt Vehed,llr.]
S -Ana ft6i ilararrE
Eagle Plaza
Preliminary Drainage Report
Urban Olympia, LLC.
November 2023 │ 217-7257-011 13
Appendix C
Construction Stormwater
Pollution Prevention Plan
Eagle Plaza
Preliminary Drainage Report
Urban Olympia, LLC.
14 November 2023 │ 217-7257-011
Appendix D
Operations & Maintenance
Legal Agreement
Return Address
City of Yelm
Tami Merriman
105 Yelm Avenue West
Yelm,WA 98597
Document title(s)(or transactions contained therein):
1.Commercial/IndustrialAgreement to Maintain Stormwater Facilities
Reference Number(s)of Documents assigned or released:
(on page of documents(s))
Grantor(s)(Last name,firstname,middle initial)
1.Yelm Medical Office Building,LLC
2.Ritter,Scott L,Manager
Grantee(s)(Last name,firstname,middle initial)
1.City of Yelm
2.
Legal Description (abbreviated:i.e.lot,block,plat or section,township,range)
TR A of BLA080344YL,TR B OF BLA080344YL &TR C OF BLA080344YL,
Section24,Township 17,Range 1E
Assessors Property Tax Parcel/Account Number:
21724130600,21724130500,&21724130602
4212928 Pages:29
05/31/201111.08AM Agreement
ThurstonCountyWashington
YELMMEDICA..OFFICEBUILDING,LLC
5111II'l'GFDIPM #,7.14WWW4 W ill
COMMERCIAL/INDUSTRIAL
AGREEMENT TO MAINTAIN
STORMWATER FACILITIES AND TO IMPLEMENT A
POLLUTION SOUCE CONTROL PLAN
BY AND BETWEEN
EAGLE PLAZA OWNERS ASSOCIATION
ITS HEIRS,SUCCESSORS,OR ASSIGNS
(HEREINAFTER "THE EAGLE PLAZA OWNERS ASSOCIATION")
AND
CITY OF YELM
(HEREINAFTER "JURISDICTION")
The upkeep and maintenance of stormwater facilitiesand the implementation of
pollutionsource controlbest management practices(BMPs)isessentialto the protection
of water resources.AIIpropertyowners are expected to conduct business in a manner
thatpromotes environmental protection.This Agreement contains specificprovisions
with respect to maintenance of stormwater facilitiesand use of pollutionsource control
BMPs.I
I
ILEGAL DESCRIPTION:
BLAO80344YL TR A,BLAO80344YL TR B,&BLAO80344YL TR C,Section24,Township 17
Range IE
Whereas,THE EAGLE PLAZA OWNERS ASSOCIATION has constructed
improvements,includingbut not limitedto,buildings,pavement,and stormwater facilities
on the propertydescribed above.In order to furtherthe goals of the Jurisdictionto
ensure the protectionand enhancement of Jurisdiction'swater resources,the
Jurisdictionand THE EAGLE PLAZA OWNERS ASSOCIATION hereby enter intothis
Agreement.The responsibilitiesof each partyto thisAgreement are identifiedbelow.
I
THE EAGLE PLAZA OWNERS ASSOCIATION SHALL:
(1)Implement the stormwater facilitymaintenance program included herein as
Attachment "A."
(2)Implement the pollutionsource controlprogram included herein as Attachment
"B."I
(3)Maintain a record (inthe form of a log book)of steps taken to implement the
programs referenced in (1)and (2)above.The log book shallbe availablefor
inspectionby Jurisdictionstaffat 201 TAHOMA BLVD SE YELM,WA 98597 J
during normal business hours.The log book shallcatalogthe actiontaken,who
took it,when itwas done,how itwas done,and any problems encountered or
follow-onactions recommended.Maintenance items ("problems")listedin
Attachment "A"shallbe inspected on a monthly or more frequent basis as
necessary.THE EAGLE PLAZA OWNERS ASSOCIATION isencouraged to
photocopy the individualchecklistsinAttachment A and use them to complete its
monthly inspections.These completed checklistswould then,in combination,
comprise the monthly log book.
(4)Submit an annual reportto the Jurisdictionregarding implementation of the
programs referenced in (1)and (2)above.The reportmust be submitted on or
before May 15 of each calendar year and shallcontain,at a minimum,the
following:
(a)Name,address,and telephone number of the business,the person,or the
firmresponsiblefor plan implementation,and the person completing the
report.
(b)Time period covered by the report.
(c)A chronologicalsummary of activitiesconducted to implement the programs
referenced in (1)and (2)above.A photocopy of the applicablesections of
the log book,with any additionalexplanationneeded,shallnormally suffice.
For any activitiesconducted by paid partiesnot affiliatedwith THE EAGLE
PLAZA OWNERS ASSOCIATION,includea copy of the invoiceforservices.
(d)An outlineof planned activitiesforthe next year.
THE JURISDICTION SHALL:
(1)Provide technicalassistance to THE EAGLE PLAZA OWNERS ASSOCIATION
in support of itsoperationand maintenance activitiesconducted pursuant to its
maintenance and source controlprograms.Said assistance shallbe provided
upon request,and as Jurisdictiontime and resources permit,at-FnvehargMe
(2)Review the annual reportand conduct a minimum of one (1)sitevisitper year to
discuss performance and problems with THE EAGLE PLAZA OWNERS
ASSOCIATION.
I
(3)Review thisagreement THE EAGLE PLAZA OWNERS ASSOCIATION and
modify itas necessary at leastonce every three (3)years.
IREMEDIES:1
(1)ifthe Jurisdictiondetermines thatmaintenance or repairwork isrequiredto be
done to the stormwater facilityexistingon THE EAGLE PLAZA OWNERS
ASSOCIATION property,the Jurisdictionshallgive the owner of the propertyI
withinwhich the drainage facilityis located,and the person or agent in controlof
said property,noticeof the specificmaintenance and/or repairrequired.The
Jurisdictionshallset a reasonable time inwhich such work isto be completed by
the persons who were given notice.Ifthe above required maintenance and/or
repairis not completed withinthe time set by the Jurisdiction,writtennoticewill
be sent to the persons who were given noticestatingthe Jurisdiction'sintention
to perform such maintenance and billthe owner forallincurredexpenses.The
Jurisdictionmay also revoke stormwater utilityratecreditsforthe quality
component or invoke surcharges to the quantitycomponent of THE EAGLE
PLAZA OWNERS ASSOCIATION billifrequiredmaintenance isnot performed.
(2)Ifat any time the Jurisdictiondetermines thatthe existingsystem creates any
imminent threatto publichealth or welfare,the Jurisdictionmay take immediate
measures to remedy said threat.No noticeto the persons listedin (1),above,
shallbe required under such circumstances.
(3)The owner grants unrestrictedauthorityto the Jurisdictionforaccess to any and
allstormwater system featuresforthe purpose of performing maintenance or
repairas may become necessary under Remedies (1)and/or (2).
I
(4)The persons listedin(1),above,shallassume allresponsibilityforthe cost of any
maintenance and forrepairsto the stormwater facility.Such responsibilityshall
includereimbursement to the Jurisdictionwithin30 days of the receiptof the
invoiceforany such work performed.Overdue payments willrequirepayment of
interestat the currentlegalrateforliquidatedjudgments.Iflegalactionensues,
any costs or fees incurredby the Jurisdictionwillbe borne by the parties
responsibleforsaid reimbursements.
(5)The owner hereby grants to the Jurisdictionalien againstthe above-described
propertyin an amount equal to the cost incurredby the Jurisdictionto perform
the maintenance or repairwork described herein.
This Agreement is intended to protectthe value and desirabilityof the realproperty
described above and to benefitallthe citizensof the Jurisdiction.Itshallrun with the
land and be bindingon allpartieshaving or acquiringfrom THE EAGLE PLAZA
OWNERS ASSOCIATION or theirsuccessors any right,title,or interestin the property
or any partthereof,as well as theirtitle,or interestinthe propertyor any partthereof,as
well as theirheirs,successors,and assigns.They shallinure to the benefitof each
present or futuresuccessor in interestof said propertyor any part reof,or interest
therein,and to the benefitof allcitizensof the Jurisdi
Owner
Owner
STATE OF WASHINGTON )
)ss
COUNTY OF THURSTON )
On thisda and year above personallyappeared before me (Efl E
and Idit LO fff'known to be the individual(s)described,and who executed
the foregoing instrumentand acknowledge thatthey signed the same as theirfree and
voluntaryact and deed forthe uses and purposes thereinmentioned.
Given under my hand and officialseal this 19m day of 1 ,20 //
NOTARY PUBUC Notary Public in and forthe
STATE OF WASHINGTON State of Washington,residingin
COMMISSION EXPIRES
9 ),y 4
,,,,........My commission expires:0/29 13
II
STATE OF WASHINGTON )
)as
COUNTY OF THURSTON )
On thisday and year above personallyappeared before me,
,who executed the foregoing instrument and acknowledge the said
instrumentto be the free and voluntaryact and deed of said Municipal Corporation for
the uses and purposes thereinmentioned and on oath stateshe isauthorizedto execute
Ithe said instrument.II
Given under my hand and officialseal this day of ,20
Notary Publicin and forthe
State of Washington,residingin
My commission expires:
I
IAPPROVED AS TO FORM:I
I
Attachment 'A'
MAINTENANCE PLAN
REQUIRED MAINTENANCE
The following pages contain maintenance needs for most of the components that are part of
the project'sdrainage system,as well as for some components that the project may not
have.The checklistshould be competed for allsystem components on the following
schedule:
M.Monthly from November through April
A.Once in latesummer (preferablySeptember).
S.After any major storm event (use 1"in 24 hours as a guideline)items marked "S"
only.
Using photocopies of these pages,check offthe problems investigatedeach time an
inspectionwas performed.Add comments on problems found and actions taken.Keep
these "Checked"sheets in the filesas they willbe used to ritean annual report (due in
May).Some items do not need to be looked at every item an inspectionisdone.Use the
suggested frequency at the leftof each item as a guidelInefor the inspection.
The jurisdictionmay be calledfor technicalassistance.Please do not hesitateto call,
especiallyifitis unclear whether a particularsituationmay be a problem.
ATTACHMENT "A"(CONTINUED)
MaintenanceChecklistforInfiltratiorSystems
Drainage
System ConditionsTo ConditionsThat
Frequency Feature /Problem Check For ShouldExist
M,S General Trash&See Maintenance See Maintenance
debrisinpond ChecklistforPonds.Checklistfor
Ponds.
M Poisonous See Maintenance See Maintenance
vegetation ChecklistforPonds.Checklistfor
Ponds.
M,S Firehazardor See Maintenance See Maintenance
pollution ChecklistforPonds.Checklistfor
Ponds.
M Vegetation See Maintenance See Maintenance
ChecklistforPonds.Checklistfor
Ponds.
M Rodent holes See Maintenance See Maintenance
ChecklistforPonds.Checklistfor
Ponds.
M Insects See Maintenance See Maintenance
ChecklistforPonds.Checklistfor
Ponds.
A Storage Sediment A soiltexturetest Sediment
area buildupin indicatesfacilityisnot removed and
system workingatitsdesigned facilitycleanedso
capabilitiesorwas inflltrallonsystem
incorrectlydesigned.works.Sediment
trappingarea
installedtoreduce
sedimenttransport
A Storagearea A soiltexturetest Additionalvolume
drainsslowly indicatesfacilityisnot isadded through
(morethan48 workingatitsdesigned excavationto
hours)or capabilitiesorwas provideneeded
overflows incorrectlydesigned.storage.Soilis
aeratedand
rototilledto
improvedrainage.
ContacttheCity
forinformationon
itsrequirements
regarding
excavation.
M Sediment Any sedimentand debris Cleanoutsump to
trappingarea fillingareato 10%pf designdepth.
depthfromsump bottom
tobottomofoutletpipe
orobstructingflowinto
theconnectorpipe.
One Time Sediment Stormwaterenters Constructa sump
trappingarea infiltrationareadirectly forsettlingof
notpresent wlthouttreatment.solids.Segregate
ATTACHMENT "A"(CONTINUED)
settlingareafrom
restoffacility.
M Rock Sedimentand By visualinspectionIlttleReplacegravelIn
filters debris or no waterflows rockfilter.
throughfilterduring
heavy ralnstorms.
Ifyou areunsurewhethera problemexists,pleasecontacttheJurisdictionand ask fortechnicalassistance.
A=Annual(MarchorAprilpreferred)
M =Monthly(seeschedule)
S =Aftermajorstorms
ATTACHMENT "A'(CONTINUED)
M sintenanceChc:ckllstforCatcI Ba insand Inlets
Drainage
Systems ConditionsTo ConditionsThat
Frequency Feature /Problem Check For ShouldExist
M,S General Trash,debris,Trashordebrisinfrontof No trashor
and sediment thecatchbasinopeningis debrislocated
Inor on basin blockingcapacityby more immediatelyin
than10%.frontofcatch
basinopening.
Grateiskept
cleanand
allowswaterto
enter.
M Sedimentor debris(inthe No sedimentor
basin)thatexceeds 1/3the debrisinthe
depthfromthebottomof catchbasin.
basintoinvertofthelowest Catch basinis
pipeintooroutofthe dug outand
basIn.clean.
M.S Trashordebrisinany inlet Inletand outlet
orpipeblockingmore than pipesfreeof
1/3ofitsheight.trashordebris.
M Structural Cornerofframeextends Frame iseven
damage to more than%inchpastcurb withcurb.
frameand/or faceintothestreet(if
topslab applicable).
M Top slabhas holeslarger Top slabisfree
than2 squareinchesor ofholesand
crackswiderthan%inch cracks.
(intentistomake sureall
materialisrunningintothe
basin).
M Frame notsIttingflushon Frame issitting
topslab,i.e.,separationof flushon topslab
more than%inchofthe
framefromthetopslab.
A Cracksin Crackswiderthan%inch Basinreplaced
basin and longerthan3 feet,any orrepairedto
walls/bottom evidenceofsoilparticles design
enteringcatchbasin standards,
throughcracks,or Contacta
maintenanceperson professlonal
judgesthatstructureis engineerfor
unsound.evaluation.
A Crackswiderthan%inch No cracksmore
and longerthan1 footat than%inch
theJointofany iniet/outletwide atthejoint
pipeorany evidenceofsoil ofinlet/outlet
particlesenteringcatch pipe.
basinthroughcracks.
A Settlement/Basinhas settledmore Basinreplaced
misalignment than1 inchor has rotated orrepairedto
ATTACHMENT "A"(CONTINUED)
more than2 inchesoutof design
allgnment.standards.
Contacta
professional
engineerfor
evaluation.
M,S Firehazardor Presenceofchemicals No color,odor,
otherpollutionsuch as naturalgas,oil,orsludge.
and gasoline.Obnoxious Basinisdug out
color,odor,or sludge and clean.
noted.
M,S Outletpipeis Vegetationor roots No vegetationor
cloggedwith growingininlet/outletpipe rootgrowth
vegetation jointsthatismore thansix present.
inchestalland lessthan
sixinchesapart.
Ifyou areunsurewhethera problemexists,pleasecontacttheJurlsdictIonand ask ortechnicalassistance.
A =Annual(MarchorAprilpreferred)
M =Monthly(seeschedule)
S =Aftermajorstorms
ATTACHMENT "A"(CONTINUED)
MaintenanceChec distforConveyar.ceSystems (Pipas,Ditches,and Swales)
Drainage
System ConditionsTo ConditionsThat
Frequency Feature /Problem Check For ShouldExist
M.S Pipes Sediment&Accumulatedsediment Pipecleanedofall
debris thatexceeds20%ofthe sedimentand
diameterofthepipe.debris.
M Vegetation Vegetationthatreduces Allvegetation
freemovement ofwater removed so water
throughpipes,flowsfreely
throughpipes.
A Damaged Protectivecoatingis Piperepairedor
(rusted,bent,damaged:rustiscausing replaced.
or crushed)more than50%
deteriorationtoany part
ofpipe.
M Any dentthat Piperepairedor
significantlyimpedes replaced.
flow(i.e.,decreasesthe
crosssectionareaof
Pipeby more than20%).
M Pipehas majorcracksor Piperepairedor
tearsallowing replaced,
groundwaterleakage.
M,S Open Trash&Dumping ofyardwastes Remove trashand
ditches debris such as grassclippings debrisand
and branchesintobasin.disposeas
Unsightlyaccumulation prescribedby City
ofnon-degradable Waste
materialssuch as glass,Management
plastic,metal,foam,and Section.
coatedpaper.
M Sediment Accumulatedsediment Ditchcleanedof
buildup thatexceeds20%ofthe allsedimentand
designdepth.debrisso thatit
matches design.
A Vegetation Vegetation(e.g.,weedy Water flowsfreely
shrubsorsaplings)that throughditches.
reducesfreemovements Grassyvegetation
ofwaterthroughditches.shouldbe left
alone.
M Erosion See Ponds Checklist.See Ponds
damage to Checklist.
slopes
A Rock lining Maintenancepersoncan Replacerocksto
outofplaceor see nativesoilbeneath designstandard.
missing(if the rocklining,
applicable)
Varies Catch See CatchBasins See Catch Basins
basins Checklist.Checklist.
ATTACHMENT "A"(CONTINUED)
M.S Swales Trash&See above forDitches.See above for
debris Ditches.
M Sediment See above forDitches.Vegetationmay
buildup need tobe
replantedafter
cleaning.
M Vegetation Grass coverissparse Aeratesoilsand
notgrowingor and weedy orareasare reseedand mulch
overgrown overgrownwithwoody bareareas.
vegetation.Maintaingrass
heightata
minimum of6
Inchesforbest
stormwater
treatment.
Remove woody
growth,recontour,
and reseedas
necessary.
M,S Erosion See Ponds Checklist.See Ponds
damage to Checklist.
slopes
M Conversionby Swale has been filledin ifpossible,speak
homeowner to orblockedby shed,withhomeowner
incompatible woodpile,shrubbery,etc.and requestthat
use swaleareabe
restored.Contact
Citytoreport
problemifnot
rectified
voluntarily.
A Swale does Water standsinswaleor A surveymay be
notdrain flowvelocityisveryslow.needed tocheck
Stagnationoccurs.grades.Grades
need tobe in1-
5%rangeif
possible.Ifgrade
islessthan1%,
underdrainsmay
need tobe
installed.
Ifyou areunsurewhethera problemexists,pleasecontacttheJurisdictionand ask fortechnicalassistance.
Comments:
A =Annual(MarchorAprilpreferred)
M =Monthly(seeschedule)
S =Aftermajorstorms
ATTACHMENT "A"(CONTINUED)
M lintenanceChec tlistforGrou ids Landscaping)
Drainage
System ConditionsTo ConditionsThat
Frequency Feature /Problem Check For Should Exist
M General Weeds (non-Weeds growinginmore Weeds presentin
poisonous)than20%ofthe lessthan5%of
landscapedarea(trees thelandscaped
and shrubsonly).area.
M Safetyhazard Any presenceofpoison No poisonous
ivyorotherpoisonous vegetationor
vegetationorinsect insectnests
nests.presentin
landscapedarea.
M,S Trashor litter See Ponds Checklist.See Ponds
Checklist.
M,S Erosionof Noticeablerillsareseen Causes oferosion
Ground inlandscapedareas.areidentifiedand
Surface stepstakento
slowdown/spread
outthewater.
Eroded areasare
filled,contoured,
and seeded.
A Treesand Damage Limbs orpartsoftreesor Trimtrees/shrubs
shrubs shrubsthataresplitor torestoreshape.
brokenwhichaffectmore Replace
than25%ofthetotal trees/shrubswith
foliageofthetreeor severedamage.
shrub.
M Treesorshrubsthat Replanttree,
have been blowndown inspectingfor
or knockedover,injurytostem or
roots.Replaceif
severely
damaged.
A Treesor shrubswhich Placestakesand
are notadequately rubber-coatedties
supportedor areleaning aroundyoung
over,causingexposure trees/shrubsfor
oftheroots.support.
Ifyou areunsurewhethera problemexists,pleasecontacttheJurisdictIonand askfortechnicalassistance.
Comments.
A =Annual(MarchorAprilpreferred)
M =Monthly(seqschedule)
ATTACHMENT "A"(CONTINUED)
S =Aftermajorstorms
ATTACHMENT "A"(CONTINUED)
MaintenanceChec:IistforFencing#brubberyScreen/OtherLandscaping
Drainage
Systems ConditionsTo ConditionsThat
Frequency Feature /Problem Check For Should Exist
M General Missingor Any defectinthefence Fence ismended or
broken or screenthatpermits shrubsreplacedto
parts/dead easy entrytoa facility.forma solidbarrier
shrubbery toentry.
M,S Erosion Erosionhas resultedin Replacesoilunder
an openingundera fenceso thatno
fencethatallowsentry openingexceeds4
by peopleor pets.Inchesinheight.
M Unruly Shrubberyisgrowing Shrubberyis
vegetation outofcontrolor is trimmedand
infestedwithweeds.weeded toprovide
appealing
aesthetics.Do not
use chemicalsto
controlweeds.
A Wire Damaged Postsoutofplumb Postsplumb to
Fences parts more than6 inches,within1 %inchesof
Plumb.
A Top railsbentmore Top railfreeof
than6 inches.bends greaterthan 1
inch.
A Any partoffence Fence isalignedand
(includingposts,top meets design
rails,and fabric)more standards,
than1 footoutof
designalignment.
A MissIngor loose Tensionwirein
tensionwire.placeand holding
fabric.
A Missingorloose Barbedwireinplace
barbedwirethatis withlessthan%-
saggingmore than2%inchsag between
inchesbetween posts.posts.
A Extensionarm Extensionarm in
missing,broken,or placewithno bends
bentoutofshape largerthan%inch.
more than1 %Inches.
A Deteriorated Partorpartsthathave Structurally
palntor a rustingor scaling adequatepostsor
protective conditionthathas partswitha uniform
coating affectedstructural protectivecoating,
adequacy.
M Openingsin Openingsinfabricare No openingsin
fabric such thatan 8-inch fabric.
diameterballcouldfit
through.
Ifye 3 areunsurewhethera problemexists,pleasecontacttheJurisdictionand ask fortechnicalassistnce.
ATTACHMENT "A"(CONTINUED)
A =Annual (MarchorAprilpreferred)
M =Monthly(seeschedule)
S =Aftermajorstorms
EAGLE PLAZA
SOURCE CONTROL PLAN
The purpose of thisplanisto providea sourcecontrolpollutionpreventionplanforthe owners and
operatorsof EaglePlazato followduringordinaryoperationsof theirproject.Thisplanwillidentify
potentialsourcecontrolbest management practices(BMP's)thatcould be used at thissiteto provide
sourcecontrolpollutionpreventionfortheseexpected everyday operations.
EaglePlazaisa commercial development consistingof both medicalofficeand retailbuildingsinthe City
ofYelm,WA.Based on the proposed use ofthe site,itisexpectedthatthe followingsourcesof
pollutionwould expectedto be presentand need a controlplan:
Landscapingand Lawn/VegetationManagement
Maintenance of Stormwater Drainageand Treatment Systems
Roof/BuildingDrainsat Manufacturingand Commercial Buildings
Washing and Steam CleaningVehicles/Equipment/BuildingStructures
Landscapingand Lawn/VeKetation ManaRement:
An integratedpestmanagement planhas been preparedforthisprojectand isattached.Alsoattached
isthe recommended BMP per volume IVofthe CityofOlympia Stormwater Manual.Both shallbe
followedto limitthe introductionof sediments,pesticides,and fertilizerinto the storm drainsystem.
Maintenance of Stormwater Drainageand Treatment Systems:
Stormwater facilitieson-siteincludecatchbasins,conveyance pipe,roofdraintightlines,and the two
StormFilterVaults.AIIof thesesystems willrequiremaintenance and cleaning.Attached isthe
recommended BMP per Volume IV of the Cityof Olympia Stormwater Manual regardingthese activities.
Roof/BuildingDrainsand Manufacturingand Commercial Building:
Roof draindownspouts willbe connected to a roofdraintightlineand connected to the on-site
stormwater conveyance and treatmentsystem.Roof runoffcan be sourcesof pollutantscaused by
leachingroofmaterials,buildingvents,and otherairemissionsources.Attached isthe recommended
BMP per Volume IVof the Cityof Olympia Stormwater Manual regardingtheseactivities.
Washing and Steam CleaningVehicles/EquipmentfBuildingStructures
Any washing of buildingsshallimplement the sourcecontrolmethods as describedinthe attachedBMP
perVolume IVof the Cityof Olympia Stormwater Manual regardingthese activities.
I
BMPs for Descriptionof PollutantSources:Landscaping can includegrading,soil
Landscaping transfer,vegetationremoval,pesticideand fertilizerapplications,and
and Lawn/watering.Stormwater contaminantsincludetoxicorganiccompounds,
Vegetation heavy metals,oils,totalsuspended solids,coliformbacteria,fertilizers,and
Management pesticides.
Lawn and vegetationmanagement can includecontrolof objectionable
weeds,insects,mold,bacteriaand otherpestswith chemical pesticidesand
isconducted commercially at commercial,industrial,and residentialsites.
Examples includeweed controlon golfcourselawns,accessroads,and
utilitycorridorsand during landscaping;sap stainand insectcontrolon
lumber and logs;rooftopmoss removal;killingnuisancerodents;
fungicideapplicationto patiodecks,and residentiallawn/plantcare.
Toxic pesticidessuch as pentachlorophenol,carbamates,and
organometallicscan be releasedto the environment by leachingand
drippingfrom treatedparts,containerleaks,productmisuse,and outside
storageof pesticidecontaminatedmaterialsand equipment.Poor
management of the vegetationand poor applicationof pesticidesor
fertilizerscan cause appreciablestormwatercontamination.
PollutantControl Approach:Controlof fertilizerand pesticide
applications,soilerosion,and sitedebristo preventcontaminationof
stormwater.
Develop and implement an IntegratedPestManagement Plan (IPM)and
use pesticidesonly as a lastresort.Ifpesticides/herbicidesareused they
must be carefullyappliedin accordancewith labelinstructionson U.S.
EnvironmentalProtectionAgency (EPA)registeredmaterials.Maintain
appropriatevegetation,with properfertilizerapplicationwhere
practicable,to controlerosionand thedischargeof stormwaterpollutants.
Where practicablegrow plantspeciesappropriateforthe site,or adjustthe
soilpropertiesof the subjectsiteto grow desiredplantspecies.
Applicable Operational BMPs for Landscaping:
*Installengineeredsoil/landscapesystems to improve the infiltration
and regulationof stormwater in landscapedareas.
*Do not disposeof collectedvegetationintowaterways or storm
drainagesystems.
Recommended Additional Operational BMPs for Landscaping:
*Conduct mulch-mowing whenever practicable
*Dispose of grassclippings,leaves,sticks,or othercollectedvegetation,
by composting,iffeasible.
*Use mulch or othererosioncontrolmeasures when soilsare exposed
formore than one week duringthe dry season or two days duringthe
ramy season.
*Ifoilor otherchemicals are handled,storeand maintainappropriateoil
and chemical spillcleanup materialsinreadilyaccessiblelocations.
Ensure thatemployees are familiarwith proper spillcleanup
procedures.
*Tillfertilizersintothe soilratherthan dumping or broadcastingonto
the surface.Determine the proper fertilizerapplicationforthe typesof
soiland vegetationencountered.
*Tilla topsoilmix or composted organicmaterialintothe soilto create
a well-mixed transitionlayerthatencouragesdeeper rootsystems and
drought-resistantplants.
*Use manual and/ormechanical methods of vegetationremoval rather
than applyingherbicides,where practical.
Applicable Operational BMPs for the Use of Pesticides:
*Develop and implement an IPM (See sectionon IPM at end of BMP)
and use pesticidesonly as a lastresort.
*Implement a pesticide-useplan and includeat a minimum:a listof
selectedpesticidesand theirspecificuses;brands,formulations,
applicationmethods and quantitiesto be used;equipment use and
maintenance procedures;safety,storage,and disposalmethods;and
monitoring,recordkeeping,and publicnoticeprocedures.All
proceduresshallconform to therequirementsof Chapter 17.21RCW
and Chapter 16-228 WAC (Appendix IV-D R.7).
*Choose the leasttoxicpesticideavailablethatiscapableof reducing
the infestationto acceptablelevels.The pesticideshould readily
degrade in the environment and/orhave propertiesthatstronglybind it
to the soil.Any pestcontrolused shouldbe conducted atthe lifestage
when the pestismost vulnerable.For example,ifitisnecessarytouse
a Bacillusthuringiensisapplicationto controltentcaterpillars,itmust
be appliedbeforethe caterpillarscocoon or itwillbe ineffective.Any
method used should be site-specificand not used wholesaleover a
wide area.
*Apply thepesticideaccordingto labeldirections.Under no conditions
shallpesticidesbe appliedin quantitiesthatexceed manufacturer's
mstructions.
*Mix the pesticidesand cleanthe applicationequipment in an area
where accidentalspillswillnot entersurfaceor ground waters,and
willnot contaminatethe soil.
*Storepesticidesin enclosedareasor in covered impervious
containment.Ensure thatpesticidecontaminatedstormwateror
spills/leaksof pesticidesare not dischargedto storm drains.Do not
hose down thepaved areasto a storm drainor conveyance ditch.Store
and maintainappropriatespillcleanupmaterialsin a locationknown to
allnear the storagearea.
*Clean up any spilledpesticidesand ensurethatthepesticide
contaminatedwaste materialsarekept in designatedcovered and
containedareas.
*The pesticideapplicationequipment must be capableof immediate
shutoffin theeventof an emergency.
*Do not spraypesticideswithin 100 feetof open waters including
wetlands,ponds,and streams,sloughsand any drainageditchor
channel thatleadsto open water exceptwhen approved by Ecology or
the localjurisdiction.All sensitiveareasincludingwells,creeksand
wetlandsmust be flaggedpriorto spraying.
*As requiredby the localgovernment or by Ecology,complete public
postingof the areato be sprayed priorto the application.
*Spray applicationsshould only be conducted during weather
conditionsas specifiedin the labeldirectionand applicablelocaland
stateregulations.Do not apply duringrainor immediatelybefore
expectedrain.
Recommended Additional Operational BMPs for the use of pesticides:
*Consider alternativesto the use of pesticidessuch as coveringor
harvestingweeds,substitutevegetativegrowth,and manual weed
control/mossremoval.
*Consider the use of soilamendments,such as compost,thatareknown
to controlsome common diseasesinplants,such as Pythium rootrot,
ashy stem blight,and parasiticnematodes.The followingarethree
possiblemechanisms fordiseasecontrolby compost addition(USEPA
Publication530-F-9-044):
1.Successfulcompetitionfornutrientsby antibioticproduction;
2.Successfulpredationagainstpathogens by beneficial
microorganism;and
3.Activationof disease-resistantgenes in plantsby composts.
Installingan amended soil//andscapesystem can preserve both theplant
system and thesoilsystem more effectively.This typeof approach
provides a soil/landscapesystem with adequate depth,permeability,and
organic mattertosustainitselfand continueworking as an effective
stormwater infiltrationsystem and a sustainablenutrientcycle.
*Once a pesticideisapplied,itseffectivenessshouldbe evaluatedfor
possibleimprovement.Records should be kept showing the
applicabilityand inapplicabilityof thepesticidesconsidered.
*An annual evaluationprocedure should be developed includinga
review of the effectivenessof pesticideapplications,impact on buffers
and sensitiveareas(includingpotablewells),publicconcerns,and
recenttoxicologicalinformationon pesticidesused/pmposed foruse.
Ifindividualor publicpotablewellsarelocatedin theproximityof
commercial pesticideapplicationscontacttheregionalEcology
hydrogeologistto determine ifadditionalpesticideapplicationcontrol
measures arenecessary.
*Rinseatefrom equipment cleaningand/ortriple-rinsingofpesticide
containersshould be used as product or recycledintoproduct.
*The applicationequipment used should be capableof immediate
shutoffin the event of an emergency.
For more information,contactthe WSUExtension Home-Assist Program,
(253)445-4556,or Bio-IntegralResource Center (BIRC),P.O.Box 7414,
Berkeley,CA.94707,or the Washington Department ofEcology to obtain
"Hazardous Waste Pesticides"(Publication#89-41);and/or EPA to
obtaina publicationentitled"Suspended,Canceled and Restricted
Pesticides"which listsallrestrictedpesticidesand thespecificuses that
are allowed.Vaheableinformationfrom thesesourcesmay also be
availableon the internet.
Applicable Operational BMPs for Vegetation Management:
*Use atleastan eight-inch"topsoil"layerwith at least8 percentorganic
matterto providea sufficientvegetation-growingmedium.Amending
existinglandscapesand turfsystems by increasingthepercentorganic
matterand depth of topsoilcan substantiallyimprove thepermeability
of the soil,the diseaseand drought resistanceof the vegetation,and
reduce fertilizerdemand.This reducesthedemand forfertilizers,
herbicides,and pesticides.Organic matteristheleastwater-soluble
form of nutrientsthatcan be added to the soil.Composted organic
mattergenerallyreleasesonly between 2 and 10 percentof itstotal
nitrogenannually,and thisreleasecorrespondscloselyto theplant
growth cycle.Ifnaturalplantdebrisand mulch arereturnedto the
soil,thissystem can continuerecyclingnutrientsindefinitely.
*Selectthe appropriateturfgrassmixture foryour climateand soiltype.
Certaintallfescuesand rye grassesresistinsectattackbecause the
symbioticendophyticfungi found naturallyin theirtissuesrepelor kill
common leafand stem-eatinglawn insects.They do not,however,
repelroot-feedinglawn pestssuch as Crane Fly larvae,and aretoxicto
ruminantssuch as cattleand sheep.The fungus causesno known
adverse effectsto thehost plantor to humans.Endophytic grassesare
commercially availableand can be used in areassuch as parks or golf
courseswhere grazingdoes not occur.The localCooperative
Extension once can offeradviceon which typesof grassarebest
suitedto the areaand soiltype.
*Use the followingseedingand plantingBMPs,or equivalentBMPs to
obtaininformationon grassmixtures,temporary and permanent
seedingprocedures,maintenance of a recentlyplantedarea,and
fertilizerapplicationrates:Temporary Seeding,Mulching and Matting,
Clear PlasticCovering,Permanent Seeding and Planting,and Sodding
as describedinVolume II).
*Selectionof desiredplantspeciescan be made by adjustingthe soil
propertiesof the subjectsite.For example,a constructedwetland can
be designedto resistthe invasionof reed canary grassby layering
specificstrataof organicmatters(e.g.,compost forestproduct
residuals)and creatinga mildly acidicpH and carbon-richsoil
medium.Consult a soilrestorationspecialistforsite-specific
conditions.
*Aerate lawns regularlyin areasof heavy use where the soiltends to
become compacted.Aerationshould be conducted while the grasses
in the lawn are growing most vigorously.Remove layersof thatch
greaterthan %-inch deep.
*Mowing isa stress-creatingactivityforturfgrass.When grassis
mowed too shortitsproductivityisdecreasedand thereislessgrowth
of rootsand rhizomes.The turfbecomes lesstolerantof
environmentalstresses,more diseaseprone and more relianton outside
means such as pesticides,fertilizersand irrigationto remain healthy.
Set themowing heightatthehighestacceptableleveland mow at
times and intervalsdesigned to minimize stresson the turf.Generally
mowing only 1/3 of the grassbladeheightwillpreventstressingthe
turf.
Irrigation:
*The depth from which a plantnormally extractswater depends on the
rootingdepth of the plant.Appropriatelyirrigatedlawn grasses
normally rootin the top 6 to I2 inchesof soil;lawns irrigatedon a
dailybasisoftenrootonly in thetop 1 inch of soil.Improper irrigation
can encourage pestproblems,leachnutrients,and make a lawn
completelydependent on artificialwatering.The amount of water
applieddepends on the normal rootingdepth of the turfgrassspecies
used,the availablewater holdingcapacityof the soil,and the
efficiencyof the irrigationsystem.Consultwith the localwater utility,
ConservationDistrict,or CooperativeExtensionofficeto help
determineoptimum irrigationpractices.
FertilizerManagement:
*Turfgrassismost responsiveto nitrogenfertilization,followedby
potassium and phosphorus.Fertilizationneeds vary by sitedepending
on plant,soiland climaticconditions.Evaluationof soilnutrient
levelsthroughregulartestingensuresthebestpossibleefficiencyand
economy of fertilization.For detailson soilstesting,contactthe local
ConservationDistrictor CooperativeExtensionService.
*Fertilizersshould be appliedin amounts appropriatefor the target
vegetationand atthe time of year thatminimizes lossesto surfaceand
ground waters.Do not fertilizeduring a drought or when the soilis
dry.Alternatively,do not apply fertilizerswithinthreedays priorto
predictedrainfall.The longerthe periodbetween fertilizerapplication
and eitherrainfallor irrigation,thelessfertilizerrunoffoccurs.
*Use slow releasefertilizerssuch as methylene urea,IDBU,or resin
coated fertilizerswhen appropriate,generallyin the spring.Use of
slow releasefertilizersisespeciallyimportantin areaswith sandy or
gravellysoils.
*Time the fertilizerapplicationto periodsof maximum plantuptake.
Generallyfalland springapplicationsare recommended,although
WSU turfspecialistsrecommend fourfertilizerapplicationsper year.
*Properlytrainedpersonsshould apply allfertilizers.At commercial
and industrialfacilitiesfertilizersshould not be appliedto grass
swales,filterstrips,or bufferareasthatdrainto sensitivewater bodies
unlessapproved by the localjurisdiction.
IntegratedPest Management
An IPM program might consistof the followingsteps:
Step 1:Correctlyidentifyproblem pestsand understandtheirlifecycle
Step 2:Establishtolerancethresholdsforpests.
Step 3:Monitor to detectand preventpestproblems.
Step 4:Modify the maintenance program to promote healthyplantsand
discouragepests.
Step 5:Use cultural,physical,mechanical,or biologicalcontrolsfirstif
pestsexceed the tolerancethresholds.
Step 6:Evaluateand recordthe effectivenessof thecontroland modify
maintenance practicesto supportlawn or landscaperecoveryand prevent
recurrence.
For an elaborationof thesestepsreferto Appendix IV-F.
7
BMPs for Descriptionof PollutantSources:Facilitiesincluderoadsidecatch
Maintenance of basinson arterialsand withinresidentialareas,conveyance systems,
Stormwater detentionfacilitiessuch as ponds and vaults,oiland water separators,
Drainage and biofilters,settlingbasins,infiltrationsystems,and allothertypesof
Treatment stormwatertreatmentsystems presentedin Volume V.Roadside catch
Systems basinscan remove from 5 to 15 percentof the pollutantspresentin
stormwater.When catchbasinsare about 60 percentfullof sediment,they
cease removing sediments.Oil and grease,hydrocarbons,debris,heavy
metals,sedimentsand contaminatedwater are found in catchbasins,oil
and water separators,settlingbasins,etc.
PollutantControl Approach:Provide maintenance and cleaningof
debris,sediments,and oilfrom stormwater collection,conveyance,and
treatmentsystems to obtainproper operation.
Applicable Operational BMPs:
Maintain stormwatertreatmentfacilitiesaccordingto the O &M
procedurespresentedin Section4.6 of Volume V in additionto the
followingBMPs:
*Inspectand cleantreatmentBMPs,conveyance systems,and catch
basinsas needed,and determinewhether improvements in O &M are
needed.
*Promptly repairany deteriorationthreateningthe structuralintegrityof
the facilities.These includereplacementof clean-outgates,catch
basinlids,and rock in emergency spillways.
*Ensure thatstorm sewer capacitiesarenot exceeded and thatheavy
sediment dischargesto the sewer system areprevented.
*Regularlyremove debrisand sludge from BMPs used forpeak-rate
control,treatment,etc.and dischargeto a sanitarysewer ifapproved
by the sewer authority,or truckto a localor stategovermnent
approved disposalsite.
*Clean catchbasinswhen the depth of depositsreaches60 percentof
the sump depth as measured from the bottom of basinto the invertof
the lowestpipe intoor out of the basin.However,in no case should
therebe lessthan sixinchesclearancefrom thedebrissurfaceto the
invertof the lowestpipe.Some catchbasins(forexample,WSDOT
Type IL basins)may have as littleas 12 inchessediment storage
below the invert.These catchbasinswillneed more frequent
inspectionand cleaningto preventscouring.Where thesecatchbasins
are partof a stormwatercollectionand treatmentsystem,the system
ownerloperatormay choose to concentratemaintenance effortson
downstream controldevicesas partof a systems approach.
*Clean woody debrisin a catchbasinas frequentlyas needed to ensure
proper operationof the catchbasin.
*Post warning signs;"Dump No Waste -Drains to Ground Water,"
"Streams,""Lakes,"or emboss on or adjacentto allstorm draininlets
where practical.
*Disposal of sedimentsand liquidsfrom thecatchbasinsmust comply
with "Recommendations forManagement of StreetWastes"described
in Appendix IV-G of thisvolume.
Additional Applicable BMPs:SelectadditionalapplicableBMPs from
thischapterdepending on the pollutantsourcesand activitiesconducted at
the facility.Those BMPs include:
*BMPs forSoilErosion and Sediment ControlatIndustrialSites
*BMPs forStorageof Liquid,Food Waste,or Dangerous Waste
Containers
*BMPs for Spillsof Oil and Hazardous Substances
*BMPs forIllicitConnectionsto Storm Drains
*BMPs forUrban Streets.
BMPs for Roof/Description of PollutantSources:Stormwater runofffrom roofsand
Building Drains sidesof manufacturingand commercial buildingscan be sourcesof
at Manufacturing pollutantscaused by leachingof roofingmaterials,buildingvents,and
and Commercial otherairemissionsources.Vapors and entrainedliquidand solid
Buildings droplets/particleshave been identifiedas potentialpollutantsin
roof7buildingrunoff.Metals,solvents,acidic/alkalinepH,BOD,and
organics,are some of the pollutantconstituentsidentified.
PollutantControl Approach:Evaluatethepotentialsourcesof
stormwaterpollutantsand apply source controlBMPs where feasible.
Applicable Operational Source Control BMPs:
*Ifleachatesand/oremissionsfrom buildingsaresuspectedsourcesof
stormwaterpollutants,then sample and analyzethe stormwater
drainingfrom the building.
*Ifa roof/buildingstormwaterpollutantsourceisidentified,implement
appropriatesourcecontrolmeasures such as airpollutioncontrol
equipment,selectionof materials,operationalchanges,material
recycle,processchanges,etc.
BMPs for Description of PollutantSources:Vehicles,aircraft,vessels,and
Washing and transportation,restaurantcooking,carpetcleaning,and industrial
Steam Cleaning equipment,and largebuildingsmay be commercially cleanedwith low or
Vehicles/high pressurewater or steam.This includesfrequent"charity"car washes
Equipmentl atgas stationsand commercial parkinglots.The cleaningcan include
Building hand washing,scrubbing,sanding,etc.Washwater from cleaning
Structures activitiescan containoiland grease,suspended solids,heavy metals,
solubleorganics,soaps,and detergentsthatcan contaminatestormwater.
PollutantControl Approach:The preferredapproach isto cover and/or
containthe cleaningactivity,or conduct the activityinsidea building,to
separatethe uncontaminatedstormwater from thepollutantsources.
Washwater must be conveyed to a sanitarysewer afterapprovalby the
localsewer authority,temporarilystoredbeforeproperdisposal,or
recycled,with no dischargeto the ground,to a storm drain,or to surface
water.Washwater may be dischargedto the ground afterproper treatment
in accordance with Ecology guid<mce WQ-95-056,"Vehicleand
Equipment Wash water Discharges,
"June 1995.The qualityof any
dischargeto the ground afterproper treatmentmust comply with
Ecology's Ground Water QualityStandards,Chapter 173-200 WAC.
Contact the localEcology Regional Officeforan NPDES Permit
applicationfordischargeof washwater to surfacewater or to a storm drain
afteron-sitetreatment.
Applicable StructuralSource Control BMPs:Conduct vehicle/
equipment washing in one of the followinglocations:
*At a commercial washing facilityin which the washing occurs in an
enclosureand drainsto the sanitarysewer,or
*In a buildingconstructedspecificallyforwashing of vehiclesand
equipment,which drainsto a sanitarysewer.
Conduct outsidewashing operationin a designatedwash areawith the
followingfeatures:
*In a paved area,constructedas a spillcontainmentpad to preventthe
run-on of stormwaterfrom adjacentareas.Slope the spillcontainment
areaso thatwashwater iscollectedin a containmentpad drainsystem
with perimeterdrains,trenchdrainsor catchment drains.Size the
containmentpad to extend out a minimum of fourfeeton allsidesof
the vehiclesand/orequipment being washed.
*Convey the washwater to a sump (likea gritseparator)and then to a
sanitarysewer (ifallowed by the localSewer Authority),or other
appropriatewastewatertreatmentor recyclesystem.An NPDES
permit may be requiredforany washwater dischargeto a storm drain
or receivingwater aftertreatment.Contact theEcology regionaloffice
forNPDES Permit requirements.
*The containmentsump must have a positivecontroloutletvalve for
spillcontrolwith livecontainmentvolume,and oil/waterseparation.
Size the minimum livestoragevolume to containthemaximum
expected dailywashwater flow plus the sludge storagevolume below
the outletpipe.The outletvalve willbe shut duringthewashing cycle
to collectthe washwater in the sump.The valve shouldremain shut
foratleasttwo hours followingthe washing operationto allow the oil
Note thatthe and solidsto separatebeforedischargeto a sanitarysewer.(See
purpose of the Ecology PublicationWQ-95-056)
valveisto convey *The inletvalve in the dischargepipe should be closedwhen washing is
only washwater
not occurring,therebypreventingthe entryof uncontaminated
and contaminated
stormwater intothepretreatment/treatmentsystem.The stormwater
stormwater to a
can then drainintothe conveyance/dischargesystem outsideof the
treatmentsystem'wash pad (essentiallybypassesthe washwater treatment/conveyance
system).Post signsto inform people of the operationand purpose of
the valve.Clean the concretepad thoroughlyuntilthereisno foam or
visiblesheen in the washwater priorto closingthe inletvalve and
allowinguncontaminatedstormwater to overflow and drainoff the
pad.(See Figure2.15)
*Collectthe washwater from buildingstructuresand convey itto
appropriatetreatmentsuch as a sanitarysewer system ifitcontains
oils,soaps,or detergents,where feasible.Ifthewashwater does not
containoils,soaps,or detergentsthen itcould drainto soilsthathave
sumcient naturalattenuationcapacityfordust and sediment.
Recommended Additional BMPs:
*The wash area shouldbe well marked at gas stations,multi-family
residencesand any otherbusinesswhere non-employees wash
vehicles.
*For uncovered wash pads,the positivecontroloutletvalve may be
manually operated,but a pneumatic or electricvalvesystem is
preferable.The valve may be on a timercircuitwhere itisopened
upon completionof a wash cycle.The timerwould then closethe
valve afterthe sump or separatorisdrained(Figure2.15).
*Use phosphate-freebiodegradabledetergentswhen practicable.
*Consider recyclingthe washwater.
To sanitarysewer,
No processtreatment
Oil or a dead-end sump
Changes
Valve
Figure2.15-Uncovered Wash Area
*Because soluble/emulsifiabledetergentscan be used in thewash
medium,the selectionof soaps and detergentsand treatmentBMPs
should be consideredcarefully.Oil/waterseparatorsare ineffectivein
removing emulsifiedor water solubledetergents.
Exceptions
*At gas stations(forcharitycar washes)or commercial parking lots,
where itisnot possibleto dischargethe washwater to a sanitarysewer,
a temporary plug or a temporary sump pump can be used atthe storm
drainto collectthe washwater foroff-sitedisposalsuch as to a nearby
sanitarysewer.
*New and used car dealershipsmay wash vehiclesin theparkingstalls
as long as a temporary plug system isused to collectthe washwater for
disposalas statedabove,or an approved treatmentsystem forthe
washwater is inplace.
At industrialsitescontactthe localEcology Regional OfficeforNPDES
Permit requirementseven ifsoaps,detergents,and/orotherchemical
cleanersare not used in washing trucks.