20140270 Preliminary Stormwater Site Plan 10202014 HATTON GODA �' PANTI ER
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ENGINEERS AND SURVEYORS
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YELM PRAIRIE CHRISTIAN FOOD BANK
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Preliminary
� STORMWATER SITE PLAN
� Prepared for: Yelm Prairie Christian Church
501 103rd Avenue NE
Yelm, WA, 98597
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(360)458-7564
� October 20, 2014
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Prepared by: David W Spiller, PE
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Reviewed by Steven D. Hatton, PE
HATTON GODAT PANTIER
� 3910 Martin Way E, Suite B
a Olympia, WA 98506
'° (360) 943-1599
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Project No: 13-100
,�u Project Name: YELM PRAIRIE CHRISTIAN FOOD BANK
E:lofficelJOBS12013113-100 Yelm Prairie Christian CenterlRPT-Stormwater Site Plan-FOOD
� BANK-10.20.14.doc
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I hereby certify that this Preliminary Stormwater Site Plan for YELM PRAIRIE CHRISTIAN '
FOOD
BANK, 501 - 103RD AVENUE NE, Yelm,Washington, has been prepared by me or under my
direct supervision and meets minimum standards of THE CITY OF YELM and normal standards of
engineering practice. I hereby acknowledge and agree that THE CITY OF YELM does not and will
not assume liability for the sufFiciency, suitability or performance of drainage facilities designed by
me.
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.14 PAGE 2
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TABLE OF CONTENTS
I. PROJECT OVERVIEW AND MAPS..................................................................... 4
� Ii. EXISTING CONDITIONS SUMMARY .................................................................. 5
Iil. SUMMARY OF MINIMUM REQUIREMENTS....................................................... 9
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IV. PERMANENT STORMWATER CONTROL PLAN ............................................. 11
� V. CONSTRUCTION STORMWATER POLULUTION PREVENTION PLAN
(C-SWPPP) ....................................................................................................... 13
Section 1 Mark Clearing Limits...........................................................................13
� Section 2 Establish Construction Access...........................................................13
Section 3 Control Flow Rates.............................................................................13
Section 4 Install Sediment Controls....................................................................13
� Section 5 Stabilize Soils :....................................................................................14
Section6 Protect Slopes ....................................................................................14
Section 7 Protect Drain Inlets.............................................................................15
Section 8 Stabilize Channels and Outlets ..........................................................15
� Section 9 Control Pollutants...............................................................................16
Section 10 Control De-Watering...........................................................................16
Section11 Maintain BMPs....................................................................................
� Section 12 Manage the Project............................................................................16
VI. POLLUTION SOURCE CONTROL PROGRAM ......................................19
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� VII. APPENDICES
Appendix A Special Reports and Studies......................................................A-1
� Appendix B Drainage Maps...........................................................................B-1
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 3
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I. PROJECT OVERVIEW AND MAPS �
The Yelm Prairie Christian Church is proposing revisions to their church site at 501 - 103rd Avenue
NE to better operate a Food Bank Ministry at the Church. The site is currently developed as a �
church with a parking lot, as well as a food storage building. The building was previously permitted
and is used as a distribution point for the food bank ministry.
An existing concrete loading dock and gravel surface was also added but was not permitted. The �
impervious area of the loading dock is therefore, treated as new impervious surface.
Proposed revisions include adding a concrete pad behind the food storage building, removing �
some gravel, and placing two refrigeration trailers behind the storage food storage building. Total
new and replaced impervious area is 4,592 SF. The removed gravel area, 11,538 SF, will be
reseeded. �
The project is located within the City of Yelm, Section 19, Township 17 North, Range 2 East, W.M.
in Thurston County, Washington (see the Preliminary Site Plan in Appendix B). Tax Parcel �
Number is 64303601802. Zoning is C1 -Commercial which allows the proposed use with an
approved site.
The parcel is currently a mix of developed and undevelo ed land. Th �
p e developed portion is located
generally in the south and west areas of the parcel. The remainder of the site is undeveloped with
a mix of ineadow and treed areas. Currently runoff from the impervious surfaces is conveyed to �
storm facilities located on site. The pervious and natural areas either infiltrate or sheet flow across
the site to the northeast. The project will create less than 5,000 SF of new impervious area.
Drainage Manual's Minimum Requirements 1 through 5 apply to the NEW/REPLACED
IMPERVIOUS. �
The existing vegetation in the proposed parking addition consists of ineadow with some trees. The �
site borders Yelm Creek on the east and existing homes on the north and west. 103rd Avenue
occupies the south boundary
The site is adjacent to the Yelm Creek and its 100-year flood zone as identified by FEMA flood ~�
insurance maps. No other critical areas have been identified within the set backs of the site. No
erosion or drainage issues were visible during site visits.
The new and replaced impervious surtaces will be dispersed across meadow rassed areas. �
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 4
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II. EXISTING CONDITIONS SUMMARY
The site vegetation in the un-developed portion of the site consists of ineadow and trees. The
�` adjacent parcels are developed as single family homes. North and west of the site are single
family homes. Yelm Creek lies along the northeast side of the site. The existing developed
� portions of the site consist of a church, parking lot, and food storage building. The site lies within
the Yelm Creek Basin.
� The existing and proposed improvement areas lie between elevations 338 and 340. The area
generally slopes towards the east to Yelm Creek.
� The site includes part of the 100-year flood zone and riparian buffer for Yelm Creek. No other
critical areas have been located adjacent to the project site. No erosion downstream of the site is
Ianticipated as a result of these modifications.
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Utilities are available in the public streets and onsite including power, sewer, water, and gas.
A Soil Resource Report prepared by the National Soil Survey Joint Effort discusses the onsite soils
� characteristics (located in Appendix A). This report notes that onsite soils are mostly Spanaway
sandy gravel which are conducive to onsite infiltration.
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 5
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IIi. SUMMARY OF MINIMUM REQUIREMENTS ''
��
The drainage manual classifies this project as a Re-development project. The majority of the site is �
currently un-developed and only a small portion developed. ,r
Based on a review of the Flow Chart for Determining Requirements for New Development (figure
2.3 (b)from the Drainage Manual) Minimum Requirements 1-5 apply to the project. "�
• The project has less than 5,000 SF of new impervious area. '�
• The project does NOT exceed 50% of existing impervious area. R
• The project does NOT exceed 25% of the assessed value of the site. J
Minimum Requirements 1 through 5 apply to the new impervious and converted landscape
areas. �
�
� -..�I'`%•,� a- (
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Dcac d�e l��3::nc6-:ic:_an•cc.a:?.l1GJ c�ia:a?__�'or��zt=_x.' `II
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— -- - —- --
�Yes po�
.__� _._ I �
i _;_ _ - .-,e._� __ _��__.__���.�u_
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Le z�3 i?FL, 3 L.�d .�+'a�e.�d�e L;¢3 � �
I 3.zLbed i
� Ne=t Ques[ion
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Nert
Question - -�
$.3l b�Tiuimnm R,eq•�em.EUt_apgly t,die � I �_:a� �..
. ncac hbd auiace,auc'�e con!-Fated _� 1v d F:�ct' �
I
re=etatiuu arezs. � Yes
- t�o
i L7a��eFrajeM ada S,OOG s�iare feet er mnr ofu�c hard vL�ace;:' j �
Yes NO ,
_,,.__.._. _ _.�. _. _-____ . __._.____L
Do�c�ard:tu�cE;add`O;u or I;-e cc-a:af_�x:r:ii;_a?aced lia_a ar=a:a: �
nxn�e to tl�e esistine l�aed vrfa�x :i'G:�:T.i�:�f�t or�•,_z.-_7 coe_tLe •al_:e
�� t�itL'!utl�pinject luuts°. �+tliz pr:�pc_a:.i^i�rc�.'sueu::-�::i•a:�
I L"tc?:.7 Lj1CJ:'2'_ell::—.?':icE_:'i�°<�.2'3c
].�."?_:"r_L"FI'.:c(�S?�2�_x;a�_sr�3!.la��._���
NO Y@S
E:_st_ue:ite uuc:er—__t:'. �
\o addicic�al �
tea�Ements � No__
�--------- Yes r . —�
- -- I Ido adcia�ua. I
LL241TC?'_?_-� I �
� ��1��'R1b1IlA�2CjL17IC117E9C5 2�1}:�.O[11217.Q44 3rid
� rEplaced hard sucfac�an�e�•:�ied.�geiation��e�.
I
Fig�re 2,4.2-Flow Char�for�e4ermining Reqvirememts for Redevetopment �
YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 9
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TABLE 4.1 THRESHOLD DISCHARGE AREA
(All areas measured in SF)
Total New and Replaced Non-Pollution �
Generating Impervious Surface (NPGIS)
Total New and Repiaced Pollution
Generating Impervious 4,592
Surface (PGIS)
Total Pollution Generating Pervious Surface 11,538
(PGPS)
Native Vegetation Converted to 0
� Lawn/Landscape
, Total Effective Impervious Surface 4,592
�
Discharge Point East Property Line
� TABLE 4.2 TREATMENT REQUIREMENTS BY THRESHOLD DISCHARGE AREA
, <'/.Acres of >'/<Acres of <5,000 ftz of >5,000 ftz of
PGPS PGPS PGIS PGIS
' Treatment Facilities X X
, On-site Stormwater BMPs X X X X
' TABLE 4.3 FLOW CONTROL REQUIREMENTS BY THRESHOLD DISCHARGE AREA
' FLOW CONTROL ONSITE STORMWATER
`
FACILITIES MANAGEMENT BMPS
<3/ acres conversion to lawn/landscape or X
� <2.5 acres to pasture.
+ > 3/acres conversion to lawn/landscape or X X
> 2.5 acres to pasture.
,.
< 10,000 ft2 of effective impervious area. X
> 10,000 ft2 of effective impervious area. X X
> 0.1 cfs increase in the 100-year return
'� frequency flow. X X
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.202014 PAGE 1�
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IV. PERMANENT STORMWATER CONTROL PLAN Y"
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There are ten minimum requirements for stormwater management within the City of Yelm. The
minimum requirements are: ,�
1. Preparation of Stormwater Site Plan �j
2. Construction Stormwater Pollution Prevention
�
3. Source Control of Pollution
,�
4. Preservation of Natural Drainage Systems and Outfalls
5. Onsite Stormwater Management "'�
6. Runoff Treatment '�
7. Flow Control ,�
8. Wetlands Protection a�
9. Basin/Watershed Planning
10. Operation and Maintenance �
,�
Minimum Requirements 1-5 apply to this project's new impervious and converted landscape areas.
Addressing these five requirements, it is anticipated that the proposed project will have little or no �
adverse effects on the downstream and surrounding hydrology. Each of the minimum
requirements is discussed below.
Minimum Requirement#1: Preparation of Stormwater Site Plan �!
This Stormwater Site Plan is submitted as part of the project to meet this requirement. �
Minimum Requirement#2: Construction Stormwater Pollution Prevention �
A Construction Stormwater Pollution Prevention Plan (C-SWPPP) is provided in Section XIII. The
CSWPP addresses erosion and sediment control anticipated during construction. �
Minimum Requirement#3: Source Control of Pollution `�
The catch basins located in the new parking area will have"No Dumping" stenciled adjacent to the �
structure. Site management will also receive a copy of the Pollution Source Control Program as
found in Section VI. The Source Control Program describes Best Management Practices (BMPs)
for household products, automotive maintenance, pesticides, fertilizers and remodeling.
Minimum Requirement#4: Preservation of Natural Drainage Systems and �
Outfalls
No revisions to the existing discharge points are proposed. No modifications are being made to the �
existing stormwater system. The new and replaced impervious surfaces will either drain to the
existing storm system for the parking lot or be dispersed into vegetation.
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 11
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Minimum Requirement#5: Onsite Stormwater Management, Including
Easements and Setbacks
The new and replaced impervious surfaces located behind the food storage building will be
dispersed thru meadow grass; BMP BMP T5.11: Concentrated Flow Dispersion. Flow dispersion
Dispersion from driveways or other pavement through a vegetated pervious area attenuates peak
flows by slowing entry of the runoff into the conveyance system, allowing for some infiltration, and
providing some water quality benefits.
No revisions are planned for the existing on-site stormwater system. Based on the soil type and
, relatively small size of the project, the project will have little or no effect on the natural hydrologic
characteristics of the site.
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YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 12
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V. CONSTRUCTION STORMWATER POLULUTION R
PREVENTION PLAN (C-SWPPP) r
�
Projects in which the new, replaced, or new plus replaced impervious surfaces total 2,000 square �
feet or more, or disturb 7,000 square feet or more of land must prepare a Construction Stormwater
Pollution Prevention Plan (GSWPPP). The GSWPPP is a separate document and must address ,�
each of the twelve elements unless site conditions render the element unnecessary and the
exemption from the element is clearly justified in the narrative of the GSWPPP. °'�
Section 1 Mark Clearing Limits "�
�
a. Prior to land disturbing activities, including clearing and grading, all clearing limits, sensitive
areas and their buffers and trees that are to be preserved within the construction area shall �
be clearly marked, both in the field and on the plans, to prevent damage and offsite �
impacts.
b. Plastic, metal or stake wire fence may be used to mark the clearing limits. �
c. The duff layer, native topsoil and natural vegetation shall be retained in an undisturbed
state to the maximum extent practicable. �
Section 2 Establish Construction Access
a. Construction vehicle access and exit shall be limited to one route, if possible. �
b. Access points shall be stabilized with quarry spall or crushed rock to minimize the tracking
of sediment onto public roads.
c. Public roads shall be cleaned thoroughly as needed to protect stormwater infrastructure �
and downstream water resources. Sediment shall be removed from roads by shoveling or
pickup sweeping and shall be transported to a controlled sediment disposal area. Street �
washing shall be ailowed only after sediment is removed in this manner.
d. Street wash wastewater shall be controlled by pumping back onsite, or otherwise be
prevented from discharging untreated into systems tributary to state surface waters. �
Section 3 Control Flow Rates
a. Properties and waterways downstream from the site shall be protected from erosion due to �
increases in the volume, velocity and peak flow rate of stormwater runoff from the project
site.
b. Downstream analysis is necessary if changes in flows could impair or alter conveyance �
systems, streambanks, bed sediment or aquatic habitat.
Section 4 Install Sediment Controls �
a. Prior to leaving a construction site, or prior to discharge to an infiltration facility, stormwater
runoff from disturbed areas shall pass through a sediment pond or other appropriate �
sediment removal BMP. Runoff from fully stabilized areas may be discharged without a
YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 13
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sediment removal BMP, but must meet the flow control performance standard of Element.
Full stabilization means concrete or asphalt paving; quarry spalls used as ditch lining; or
the use of rolled erosion products, a bonded fiber matrix product, or vegetation cover in a
manner that will fully prevent soil erosion. The local permitting authority should inspect and
approve areas stabilized by means other than pavement or quarry spalls.
b. Sediment barriers or filters, dikes, and other BMPs intended to trap sediment onsite shali
be constructed as one of the first steps in grading. These BMPs shall be functional before
, other land disturbing activities take place.
' Section 5 Stabilize Soils
a. Soils shall be stabilized as outlined below, where downstream water resources or
, stormwater infrastructure may be negatively affected by sediments (i.e., runoff discharges
off the development site).
b. From October 15 through April 1, no soils shall remain exposed and unworked for more
than 2 days. From April 2 through October 14, no soils shall remain exposed and
unworked for more than 7 days. From November 1 through February 28 soil disturbing
activities shall be prohibited. No soil disturbing activities shall occur within Green Cove,
, Percival, Woodard, and Ellis Creek watersheds from October 15 through April 1. This
condition applies to all onsite soils, whether at final grade or not.
c. Applicable practices include but are not limited to compost addition, temporary and
'' permanent seeding, sodding, mulching, plastic covering, soil application of polyacrylamide
(PAM), early application of gravel base on areas to be paved and dust control.
�
d. Soil stabilization measures selected should be appropriate for the time of year, site
conditions, estimated duration of use and potential water quality impacts that stabilization
� agents may have on downstream waters or groundwater.
,. e. Soil stockpiles must be stabilized from erosion, protected with sediment-trapping
measures, and located away from storm drains, waterways, or drainage channels.
.
f. Work on linear construction sites and activities, including right-of-way and easement
y° clearing, roadway development, pipelines, and trenching for utilities, shall not exceed the
capability of the individual contractor for his portion of the project to install the bedding
materials, roadbeds, structures, pipelines, and/or utilities, and to re-stabilize the disturbed
" soils, in compliance with the applicable 2-day or 7-day criterion listed above.
' Section 6 Protect Slopes
�
a. Cut and fill slopes shall be designed and constructed in a manner that will minimize
� erosion.
a b. Consider soil type and its potential for erosion.
c. Reduce slope runoff velocities by reducing the continuous length of slope with terracing
and diversions, reduce slope steepness, and roughen slope surfaces.
w
d. Offsite stormwater run-on shall be diverted away from slopes and disturbed areas with
,< interceptor dikes and swales. Offsite stormwater should be managed separately from
W,
stormwater water generated onsite.
YELM PRAIRIE CHRISTIAN FOOD BANK 10.20.2014 PAGE 14
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e. Stabilize soils on slopes, as specified in Element#5.
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Section 7 Protect Drain Inlets �
a. As needed to protect stormwater infrastructure and downstream water resources, all storm ,�
drain inlets made operable during construction shall be protected so that stormwater runoff
shall not enter the conveyance system without first being filtered or treated to remove W
sediment.
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b. All approach roads shall be kept clean, and all sediment and street wash water shall not be �
allowed to enter storm drains without prior and adequate treatment, unless treatment is
provided before the storm drain discharges to waters of the state. �
Section 8 Stabilize Channels and Outlets
a. All temporary onsite conveyance channels shall be designed, constructed and stabilized to �
prevent erosion from the peak 10-minute flow velocity from a Type 1A 10-year, 24-hour
frequency storm for the developed condition. �
b. Stabilization, including armoring material, adequate to prevent erosion of outlets, adjacent '�
streambanks, slopes and downstream reaches shall be provided at the outlets of all ,�
conveyance systems.
Section 9 Control Poliutants �
a. All pollutants, including waste materials and demolition debris, that occur onsite shall be
handled and disposed of in a manner that does not cause contamination of stormwater. �
b. Cover, containment and protection from vandalism shall be provided for all chemicals,
liquid products, petroleum products and non-inert wastes present on the site (see Chapter
173-304 WAC for the definition of inert waste). Onsite fueling tanks shall include �
secondary containment.
c. Maintenance and repair of heavy equipment and vehicles involving oil changes, hydraulic �
system drain down, solvent and de-greasing cleaning operations, fuel tank drain down and
removal, and other activities which may result in discharge or spillage of pollutants to the
ground or into stormwater runoff must be conducted using spiil prevention measures, such -�
as drip pans. Contaminated surfaces shall be cleaned immediately following any
discharge or spill incident. Report ali spills to 911. Emergency repairs may be performed
onsite using temporary plastic placed beneath, and if raining, over the vehicle. �
d. Wheel wash or tire bath wastewater shall be discharged to a separate onsite treatment
system or to the sanitary sewer if allowed by the local wastewater authority.
e. Appiication of agricultural chemicals, including fertilizers and pesticides, shall be conducted �
in a manner and at appiication rates that will not result in loss of chemical to stormwater
runoff. Manufacturers' label recommendations shall be followed for application rates and
procedures. '�
f. Management of pH-modifying sources shall prevent contamination of runoff and
stormwater collected on the site. These sources include, but are not limited to, bulk �
cement, cement kiln dust, fly ash, new concrete washing and curing waters, waste streams
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generated from concrete grinding and sawing, exposed aggregate processes, and
' concrete pumping and mixer washout waters.
Section 10 Control De-Watering
a. All foundation, vault, and trench de-watering water, which have similar characteristics to
a stormwater runoff at the site, shall be discharged into a controlled conveyance system,
prior to discharge to a sediment trap or sediment pond. Channels must be stabilized, as
specified in Element#8.
� b. Clean, non-turbid de-watering water, such as well-point groundwater, can be discharged to
systems tributary to state surface waters, as specified in Element#8, provided the de-
" watering flow does not cause erosion or flooding of the receiving waters. These clean
� waters should not be routed through sediment ponds with water.
M c. Highly turbid or otherwise contaminated de-watering water, such as from construction
equipment operation, clamshell digging, concrete tremie pour, or work inside a cofferdam,
� shall be handled separately from stormwater at the site.
� d. Other disposal options, depending on site constraints, may include:
w° 1. Infiltration
� 2. Transport offsite in vehicle, such as a vacuum flush truck, for legal disposal in a
w manner that does not pollute state waters
3. Onsite treatment using chemical treatment or other suitable treatment technologies
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4. Sanitary sewer discharge with local sewer district approval
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,, Section 11 Maintain BMPs
� a. All temporary and permanent erosion and sediment control BMPs shall be maintained and
repaired as needed to assure continued performance of their intended function. All
,� maintenance and repair shall be conducted in accordance with BMPs.
w b. Sediment control BMPs shall be inspected weekly or after a runoff-producing storm event
during the dry season and daily during the wet season.
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c. All temporary erosion and sediment control BMPs shall be removed within 30 days after
'' final site stabilization is achieved or after the temporary BMPs are no longer needed.
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Trapped sediment shall be removed or stabilized onsite. Disturbed soil areas resulting
from removal of BMPs or vegetation shall be permanently stabilized.
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Section 12 Manage the Project
a. Phasing of Construction — Development projects shall be phased where feasible in order to
�" prevent, to maximum extent practicable, the transport of sediment from the project site
during construction. Re-vegetation of exposed areas and maintenance of that vegetation
'y shall be an integral part of the clearing activities for any phase.
� b. Clearing and grading activities for developments shall be permitted only if conducted
,; pursuant to an approved site development plan that establishes permitted areas of
� clearing, grading, cutting and filling. When establishing these permitted clearing and
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grading areas, consideration should be given to minimizing removal of existing trees and
minimizing disturbance/compaction of native soils except as needed for building purposes. `'�
These permitted clearing and grading areas and any other areas required to preserve �
native growth protection easements or tree retention, as may be required by local
jurisdictions, shall be delineated on the site plans and the development site. "�
c. Site development shall include building-specific grading plans, including information ��
specified by the local permitting authority such as finished grades, finished floor elevations,
buildable areas, and identified drainage outlets. This information would normally be �
submitted with the construction drawings, but may be required prior to preliminary plat
approval.
d. Seasonal Work Limitations— From October 1 through April 30, clearing, grading and other �
soil disturbing activities shall only be permitted if shown to the satisfaction of the local
permitting authority that silt-laden runoff will be prevented from leaving the construction site �
through a combination of the following:
1. Site condition including existing vegetative coverage, slope, soil type and proximity to
� receiving waters �
2. Limitations on activities and the extent of disturbed areas
3. Proposed erosion and sediment control measures �
Based on the information provided, and/or local weather conditions, the local permitting
authority may expand or restrict the seasonal limitation on site disturbance. If, during the
course of any construction activity or soil disturbance during the seasonal limitation period, �
silt-laden runoff leaving the site causes a violation of the surface water quality standard or if
clearing and grading limits or erosion and sediment control measures shown in the
approved plan are not maintained, the local permitting authority may take enforcement
action, including but not limited to, a notice of violation, administrative order, fine/penalty, �
stop-work order, or correction notice.
Local government may restrict clearing and grading activities where site conditions may
present a significant risk of impact to property or critical areas. Contact the local permitting �
authority for information on specific site restrictions. In Olympia, except where approved
chemical treatment, full dispersion or infiltration is practiced, clearing, grading and other soil
disturbing activities are prohibited in all watersheds November through February, and in �
Green Cove, Percival, Woodard, and Ellis Creek watershed between October through April.
e. Coordination with Utilities and Other Contractors—The primary project proponent shall
evaluate, with input from utilities and other contractors, the stormwater management �
requirements for the entire project, including the utilities, when preparing the Construction
SWPPP.
f. Inspection and Monitoring �
1. All BMPs shall be inspected, maintained, and repaired as needed to assure continued
performance of their intended function. Site inspections shall be conducted by a �
person who is knowledgeable in the principles and practices of erosion and sediment �
control. The person shall have the skills to (1) assess site conditions and construction
activities that could impact stormwater runoff quality, and (2) assess erosion and
sediment control measure effectiveness. �
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2. Certified Erosion and Sediment Control Specialist(CESCS)—A CESCS shall be
� identified in the Construction SWPPP and shall be onsite or on-call at all times.
� Certification may be obtained an approved training program that meets the erosion and
sediment control training program that meets the erosion and sediment training criteria
� established by Ecology. If a pre-construction meeting is held, this person shall attend.
� 3. Sampling and analysis of the stormwater discharges from a construction site may be
necessary on a case-by-case basis to ensure compliance with standards. Monitoring
' and reporting requirements may be established by the local permitting authority when
� necessary. Sampling shall be per Volume I, Section 2.5.2 Element#12 of the City of
Olympia Stormwater Manual.
4. Whenever inspection and/or monitoring reveals that the BMPs identified in the
` C-SWPPP are inadequate, due to the actual discharge of, or potential to discharge, a
r significant amount of any pollutant, appropriate BMPs or design changes shall be
implemented as soon as possible.
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g. Maintaining an Updated Construction SWPPP
` 1. The GSWPPP shall be retained onsite or within reasonable access to the site.
`� 2. The C-SWPPP shall be updated within 7 days to reflect any significant changes in the
^ design, construction, operation, or maintenance at the construction site that have, or
could have, a significant effect on the discharge of pollutants to waters of the state.
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3. The C-SWPPP shall be updated within 7 days if during inspections or investigations by
site staff or local or state officials, it is determined that the C-SWPPP is ineffective in
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controlling pollutants such that applicable discharge or surface water standards
violations are apparent.
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VI. POLLUTION SOURCE CONTROL PROGRAM �
Purpose ��
Pollution source controls are actions taken by a person or business to reduce the amount of "�
pollution reaching surface and ground waters. Controls, also called "best management practices"
(BMPs) include: �
• Altering the activity (e.g., substitute non-toxic products, recycle used oil, route floor drains
to sanitary sewer rather than storm sewer)
• Enclosing or covering the activity (e.g., building a roof) �
• Segregating the activity (e.g., diverting runoff away from an area that is contaminated)
• Routing runoff from the activity to a treatment alternative (e.g., a wastewater treatment �
facility, sanitary sewer, or stormwater treatment area)
Recommended Pollution Control Practices For Business Owners �
Pollution source controls are needed because of the contamination found in runoff from commercial
areas and the effect of this contamination on aquatic life and human health. Research on urban
runoff in the Puget Sound area and elsewhere has found oil and grease, nutrients, organic �
substances, toxic metals, bacteria, viruses and sediments at unacceptable levels. Effects of
contaminated runoff include closure of shelifish harvesting areas and swimming areas, mortality of
young fish and other aquatic organisms, tumors on fish and impairment of fish reproduction.
Materials Used and Wastes Generated �
Of particular concern are drives and parking areas. Because of heavy vehicle usage, the
concentration of oil and grease in stormwater may exceed the Ecology guidelines of 10 mg/1. �
Although there are no local data to confirm this view, limited research in the San Francisco Bay
area found the mean concentration of oil and grease in stormwater to exceed 10 mg/1.
Required Actions �
The following actions shall be taken to ensure that pollution generated on site shall be minimized:
1. Warning signs (e.g., "Dump No Waste— Drains to Stream") shall be painted or embossed on or �
adjacent to all storm drain inlets. They shall be repainted as needed. Materiais needed to
undertake this task can be purchased or may be available from the Public Involvement
Coordinator for the Department of Public Works. `�
2. Sediment removed from basins, ponds and swales shall be disposed of in a proper manner.
Contact the local governing jurisdiction for inspection prior to completing this task.
3. No activities shall be conducted on site that are likely to result in short-term, highly �
concentrated discharge of pollution to the stormwater system. Such activities may include, but
are not limited to, heavy vehicle maintenance and cleaning of equipment used in the periodic
maintenance of buildings and paved surfaces. �
4. Use of pesticides and fertilizers shall be minimized.
5. Do not dump paint, solvents, oils, or other such substances, including landscape waste, into �
storm drains or ponds. A local automotive service center may recycle oil and oil filters.
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, APPENDIX A — Soil Survey Information
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FOOD DISTRIBUTION WAREHOUSE 10.20.2014 PAGE A-1
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A USDA United States A product ofthe National Custom Soil Resource
, = Department of Cooperative Soil Survey,
Agriculture a joint effort of the United Report for
•• (' States Department of
I V R�J Agriculture and other T h u rs to n C o u n ty
' Federal agencies, State
Natural agencies including the .
' Resources Agricultural Experiment A rea, Was h i n g to n
, Conservation Stations, and local
Service participants
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Preface
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Soil surveys contain information that affects land use planning in survey areas. They �
highlight soil limitations that affect various land uses and provide information about
the properties of the soils in the survey areas. Soil surveys are designed for many
different users, including farmers, ranchers, foresters, agronomists, urban planners,
community officials, engineers, developers, builders, and home buyers.Also, �
conservationists, teachers, students, and specialists in recreation,waste disposal,
and pollution control can use the surveys to help them understand,protect,or enhance
the environment.
Various land use regulations of Federal, State, and local governments may impose �
special restrictions on land use or land treatment. Soil surveys identify soil properties
that are used in making various land use or land treatment decisions.The information
is intended to help the land users identify and reduce the effects of soil limitations on �
various land uses.The landowner or user is responsible for identifying and complying
with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area �
planning,onsite investigation is needed to supplement this information in some cases.
Examples include soii quality assessments (http://www.nres.usda.gov/wps/portal/
nres/main/soils/healthn and certain conservation and engineering applications. For �
more detailed information, contact your local USDA Service Center(http://
offices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist(http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951). �
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads.Clayey or wet soils are poorly suited to use as septic �
tank absorption fields.A high water table makes a soil poorly suited to basements or
underground installations.
The National Cooperative Soil Survey is a joint effort of the United States Department �
of Agriculture and other Federal agencies, State agencies including the Agricultural
Experiment Stations, and local agencies. The Naturai Resources Conservation
Service (NRCS) has leadership for the Federal part of the National Cooperative Soil
Survey.
Information about soils is updated periodically. Updated information is available "'�
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture(USDA)prohibits discrimination in all its programs �
and activities on the basis of race, color, national origin, age, disability, and where
applicable, sex, marital status,familial status, parental status, religion, sexual
orientation,genetic information, political beliefs, reprisal,or because all or a part of an "�
individual's income is derived from any public assistance program. (Not all prohibited
bases apply to all programs.) Persons with disabilities who require alternative means
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, for communication of program information(Braille, large print, audiotape, etc.)should
contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a
+° complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400
Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272
' (voice) or(202)720-6382 (TDD). USDA is an equal opportunity provider and
M employer.
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Contents
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Preface....................................................................................................................2
HowSoil Surveys Are Made..................................................................................5 �
SoilMap..................................................................................................................7
SoilMap................................................................................................................8
Legend..................................................................................................................9 �
MapUnit Legend................................................................................................10
MapUnit Descriptions........................................................................................10
Thurston County Area, Washington................................................................12
65—McKenna gravelly silt loam, 0 to 5 percent slopes...............................12 �
110—Spanaway gravelly sandy loam, 0 to 3 percent slopes......................13
112—Spanaway stony sandy loam, 0 to 3 percent slopes..........................14
References............................................................................................................15
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How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous areas
in a specific area.They include a description of the soils and miscellaneous areas and
� their location on the landscape and tables that show soil properties and limitations
affecting various uses. Soil scientists observed the steepness, length, and shape of
the slopes; the general pattern of drainage; the kinds of crops and native plants; and
the kinds of bedrock.They observed and described many soil profiles.A soil profile is
Y the sequence of natural layers, or horizons, in a soil. The profile extends from the
surtace down into the unconsolidated material in which the soil formed or from the
surface down to bedrock.The unconsolidated material is devoid of roots and other
„ living organisms and has not been changed by other biological activity.
Currently,soils are mapped according to the boundaries of major land resource areas
(MLRAs). MLRAs are geographically associated land resource units that share
,„ common characteristics related to physiography, geology, climate,water resources,
soiis, biological resources, and land uses (USDA, 2006). Soil survey areas typically
consist of parts of one or more MLRA.
,� The soils and miscellaneous areas in a survey area occur in an orderly pattern that is
related to the geology, landforms, relief, climate, and natural vegetation of the area.
Each kind of soil and miscellaneous area is associated with a particular kind of
landform or with a segment of the landform. By observing the soils and miscellaneous
� areas in the survey area and relating their position to specific segments of the
landform,a soil scientist develops a concept,or model,of howthey were formed.Thus,
during mapping, this model enables the soil scientist to predict with a considerable
degree of accuracy the kind of soil or miscellaneous area at a specific location on the
` landscape.
� Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
�' scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented by
' an understanding of the soil-vegetation-landscape relationship, are sufficient to verify
,r predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
" noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
� fragments,distribution of plant roots, reaction, and other features that enable them to
identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
� characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically.Soil taxonomy, the system of taxonomic
� classification used in the United States, is based mainly on the kind and character of
� soil properties and the arrangement of horizons within the profile.After the soil
scientists classified and named the soils in the survey area, they compared the
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Custom Soil Resource Report �
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and �
research.
The objective of soil mapping is not to delineate pure map unit components; the ,�
objective is to separate the landscape into landforms or landform segments that have �
similar use and management requirements. Each map unit is defined by a unique
combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components of �
the map unit. The presence of minor components in a map unit in no way diminishes
the usefulness or accuracy of the data. The delineation of such landforms and
landform segments on the map provides sufficient information for the development of
resource plans. If intensive use of small areas is planned, onsite investigation is �
needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of �
mapping, intensity of mapping, design of map units, complexity of the landscape,and
experience of the soil scientist. Observations are made to test and refine the soil-
landscape model and predictions and to verify the classification of the soils at specific �
locations. Once the soil-landscape model is refined, a significantly smaller number of
measurements of individual soil properties are made and recorded. These
measurements may include field measurements, such as those for color, depth to
bedrock, and texture, and laboratory measurements, such as those for content of �
sand, siit, clay, salt,and other components. Properties of each soil typically vary from
one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of �
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties. e�
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests.Soil scientists interpret
the data from these analyses and tests as well as the field-observed characteristics �
and the soil properties to determine the expected behavior of the soils under different
uses. Interpretations for all of the soils are field tested through observation of the soils
in different uses and under different levels of management. Some interpretations are �
modified to fit local conditions, and some new interpretations are developed to meet
local needs. Data are assembled from other sources, such as research information,
production records, and field experience of specialists. For example, data on crop
yields under defined levels of management are assembled from farm records and from �
field or plot experiments on the same kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on such
variables as climate and biological activity. Soil conditions are predictable over long '�
periods of time, but they are not predictable from year to year. For example, soil
scientists can predict with a fairly high degree of accuracy that a given soil will have
a high water table within certain depths in most years, but they cannot predict that a
high water table will always be at a specific level in the soil on a specific date. �
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
identified each as a specific map unit.Aerial photographs show trees,buildings,fields, �
roads, and rivers, all of which help in locating boundaries accurately.
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Soil Map
The soil map section includes the soil map for the defined area of interest,a list of soil
map units on the map and extent of each map unit, and cartographic symbols
displayed on the map.Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
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• Custom Soil Resource Report
M
� Map Unit Legend
.
Thurston County Area,Washington(WA667)
�,.
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
^ 65 McKenna gravelly silt loam,0 to 7.1 34.2%
5 percent slopes
�a
110 Spanaway gravelly sandy loam, 8.6 41.8%
0 to 3 percent slopes ,
P
112 Spanaway stony sandy loam,0 5.0 24.0%
�, to 3 percent slopes
Totals for Area of interest 20.6 100.0%
P'
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soii survey represent the soils
or miscellaneous areas in the survey area. The map unit descriptions, along with the
maps, can be used to determine the composition and properties of a unit.
k,
A map unit delineation on a soil map represents an area dominated by one or more
�
major kinds of soil or miscellaneous areas.A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
�. class there are precisely defined limits for the properties ofthe soils.On the landscape,
however,the soils are natural phenomena,and they have the characteristic variability
p of ail natural phenomena. Thus, the range of some observed properties may extend
beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic
'� class rarely, if ever, can be mapped without including areas of other taxonomic
classes.Consequently,every map unit is made up of the soils or miscellaneous areas
for which it is named and some minor components that belong to taxonomic classes
� other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
� map unit, and thus they do not affect use and management. These are called
�„ noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
„ and behavioral characteristics divergent enough to affect use or to require different
management.These are called contrasting,or dissimilar,components.They generally
� are in small areas and could not be mapped separately because of the scale used.
Some small areas of strongly contrasting soils or miscellaneous areas are identified
�� by a special symbol on the maps. If induded in the database for a given area,the
� contrasting minor components are identified in the map unit descriptions along with
_ some characteristics of each.A few areas of minor components may not have been
observed, and consequently they are not mentioned in the descriptions, especially
�� where the pattern was so complex that itwas impractical to make enough observations
y� to identify all the soils and miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the usefulness
" or accuracy of the data. The objective of mapping is not to delineate pure taxonomic
� classes but ratherto separate the landscape into landforms or landform segments that
have similar use and management requirements. The delineation of such segments
„
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Custom Soil Resource Report �
on the map provides sufficient information for the development of resource plans. If �
intensive use of small areas is planned, however, onsite investigation is needed to
define and locate the soils and miscellaneous areas.
An identifying symbol precedes the map unit name in the map unit descriptions. Each �
description includes general facts about the unit and gives important soil properties
and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major horizons �
that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity,
degree of erosion,and other characteristics that affect their use. On the basis of such �
differences, a soil series is divided into soil phases. Most of the areas shown on the
detailed soil maps are phases of soil series. The name of a soil phase commonly
indicates a feature that affects use or management. For example, Alpha silt loam, 0 �
to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups. �
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.The
pattern and proportion of the soils or miscellaneous areas are somewhat similar in all ,�
areas. Alpha-Beta complex, 0 to 6 percent slopes, is an exampie.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present or
anticipated uses of the map units in the survey area, it was not considered practical
or necessary to map the soils or miscellaneous areas separately. The pattern and r�
relative proportion of the soils or miscellaneous areas are somewhat similar.Alpha-
Beta association, 0 to 2 percent slopes, is an example. �
An undifferentiated group is made up of two or more soils or miscellaneous areas that
could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion of �
the soils or miscellaneous areas in a mapped area are not uniform.An area can be
made up of only one of the major soils or miscellaneous areas, or it can be made up
of all of them.Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil material r
and support little or no vegetation. Rock outcrop is an example. �
�
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� Custom Soil Resource Report
�, Thurston County Area, Washington
�
65—McKenna gravelly silt loam, 0 to 5 percent siopes
r�
Map Unit Setting
� National map unit symbol: 2nd9g
Elevation: 50 to 500 feet
'" Mean annual precip+tation: 30 to 60 inches
� Mean annual air temperature: 48 to 52 degrees F
Frost-free period: 150 to 180 days
F
Farmland classification: Prime farmland if drained
� Map Unit Composition
Mckenna and similar soi/s: 85 percent
�- Minor components: 8 percent
�.
Estimates are based on observations, descriptions, and transects of the mapunit.
,
Description of Mckenna
Setting
�" Landform: Depressions, drainageways
,
Parent material: Glacial drift
� Typical profile
H9 -0 to 9 inches: gravelly silt loam
H2-9 to 13 inches: gravelly silt loam
"` H3- 13 to 36 inches: very gravelly loam
4 H4-36 to 40 inches: very gravelly loam
Properties and qualities
" Slope: 0 to 5 percent
y Depth to restrictive feature: 20 to 40 inches to densic material
Natural drainage class: Poorly drained
�, Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately
low(0.00 to 0.06 in/hr)
� Depth to water table: About 0 inches
Frequency of flooding: None
w Frequency of ponding: Frequent
�
Available water storage in profile: Low(about 5.4 inches)
Interpretive groups
� Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
y° Hydrologic Soil Group: D
Other vegetative classification: Wet Soils (G002XS101 WA)
a Minor Components
Bellingham
Percent of map unit: 3 percent
�
Landform: Depressions
Norma
Percent of map unit: 3 percent
�w
Landform: Depressions
,:
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Skipopa �
Percent of map unit: 2 percent
,
110—S anawa ravell san I
p y g y dy loam, 0 to 3 percent slopes �
Map Unit Setting �
National map unit symbol: 2ndb6
Mean annual precipitation: 35 to 65 inches
Mean annual air temperature: 50 degrees F
Frost-free period: 150 to 200 days �
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Spanaway and similar soi/s: 100 percent �
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Spanaway .�
Setting
Landform: Terraces, outwash plains
Parent material: Volcanic ash over gravelly outwash
Typical profile �
H9 -0 to 15 inches: gravelly sandy loam
H2- 95 to 20 inches: very gravelly loam �
H3-20 to 60 inches: extremely gravelly sand
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches �
Natural drainage c/ass: Somewhat excessively drained
Capacity of the most limiting layer to transmit water(Ksat): High (1.98 to 5.95 in/hr)
Depth to watertable: More than 80 inches �
Frequencyofflooding: None
Frequency of ponding.� None
Available waterstorage in profile: Low(about 3.8 inches)
Interpretive groups �
Land capability classification (irrigated): 3s
Land capability classification (nonirrigated): 3s
Hydrologic Soil Group: A �
Other vegetative classification: Droughty Soils (G002XS401 WA)
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� Custom Soil Resource Report
�r,
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�
112—Spanaway stony sandy loam, 0 to 3 percent slopes
Map Unit Setting
'� National map unit symbol: 2ndb8
� Mean annual precipitation: 35 to 65 inches
Mean annual air temperature: 50 degrees F
�, Frost-iree period.� 150 to 200 days
Farmland classification: Farmland of statewide importance
�
Map Unit Composition
* Spanaway and similarsoils: 100 percent
� Estimates are based on observations, descriptions, and transects of the mapunit.
�, Description of Spanaway
` Setting
Landform: Outwash plains, terraces
r
Parent material: Volcanic ash over gravelly outwash
� Typical profile
H1 -0 to 16 inches: stony sandy loam
H2- 16 to 22 inches: very gravelly sandy loam
fi H3-22 to 60 inches: extremely gravelly sand
v Properties and qualities
S/ope: 0 to 3 percent
' Depth to restrictive feature: More than 80 inches
� Natural drainage c/ass: Somewhat excessively drained
Capacity of the most limiting layer to transmit water(Ksat): High (1.98 to 5.95 in/hr)
�, Depth to water table: More than 80 inches
Frequency of flooding: None
V Frequency of ponding: None
Available water storage in profile: Low(about 4.0 inches)
r
Interpretive groups
� Land capability classification(irrigated): None specified
Land capability classification (nonirrigated): 4s
P Hydrologic Soil Group: A
� Other vegetative classification: Droughty Soils (G002XS401 WA)
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Refe re n ces
�.
American Association of State Highway and Transportation Officials(AASHTO).2004.
Standard specifications for transportation materials and methods of sampling and �
testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of ,.�
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service
FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States. °�
Federal Register. September 18, 2002. Hydric soils of the United States. �
Hurt,G.W.,and L.M.Vasilas,editors.Version 6.0,2006.Field indicators of hydric soils
in the United S#ates.
National Research Council. 1995. Wetlands: Characteristics and boundaries. �
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S.
Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/nres/
detail/national/soils/?cid=nres 142p2_054262 �
Soil Survey Staff. 1999.Soil taxonomy:A basic system of soil classification for making
and interpreting soil surveys.2nd edition. Natural Resources Conservation Service,
U.S. Department of Agriculture Handbook 436. http://www.nres.usda.gov/wps/portal/ �
nres/detail/national/soils/?cid=nres 142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of ,
Agriculture,Natural Resources Conservation Service. http://www.nres.usda.gov/wps/ � I�
portal/nres/detail/national/soils/?cid=nres 142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands �
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical �
Report Y-87-1.
United States Department of Agriculture, Naturai Resources Conservation Service.
National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soiis/ �
home/?cid=nres 142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
, detailinational/landuse/rangepasture/?cid=stelprdb1043084 �
� �
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�" Custom Soil Resource Report
W�
�, United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal!
� nres/detail/soils/scientists/?cid=nres142p2_054242
�, United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,the
i� Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296.
http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
� cid=nres142p2_053624
w United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
� www.nres.usda.gov/Internet/FSE_DOCUMENTS/nres142p2_052290.pdf
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APPENDIX B — Drainage Map �
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FOOD DISTRIBUTION WAREHOUSE 10.20.2014 PAGE B-1
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� Description sf Area(ac)
Concrete Ramp 2,080 0.048
P' concrete pad and refrigeration 2,512 0.058
�, sub total new replace impervious area 4,592 0.105
�° existing gravel to be removed 11,538 0.265
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