Yelm DayCare Drainage Report~rr~ ~~- r
~~, v~~~~~~t~~
~~ra~tYge deport
1.~a~~ h, 2 (} ~ 1
r~~ar~d For:
Pv~ar%~ke D~utsc~r
1 ~{~ X rvir~ d
L~a~ 9~ I
~r~p~r~ fir:
lea parr Jell
~rar~d~; ~,. J~1~nson, P.E..
~~. arri~ Dr 'VV, Bid ~-~
lrnpi~, '~ ~5~}2
3~.. X45
H E ~ I~ 1 ~ ~1 E`'~ ~ ~ I_
CERTIFICATE OF, E111~~NEEFt
PROJECT EMGFNiEERS CEFt~'IFCAT~~N: I hereby ce
for the Yelrn Day ire 'rn 'yelm, }Nashington, has beer
supervision ar+d meets the rr~inirrrum standards of the
~torrnw~ter ~'~lanagement ~+~lanua~ for the Pu~~t Sound E
er<gafle~ring practice. ~ ur~derstar~d thak ti~~ jurisdictfor~
9iability for the suf#icien+cy, suitadilfky, ~r performance
by tee.
_ ~,
~' y
~ JPP '1f~~ ~~
Q ~ { ~
Prepared ~ hitr~~y L. ~caab, E.I.T.
~~ --
Approwed by S~ar~dan L. Jahnsor~, P.E.
r
1
r
y that this f~rain~ge Repr~rt
spared by me Or ~r~der my
39~ Department of Ecalo9Y
Fin and n~rrnal standards of
yes rkot and wiil not ass~rne
drainac~~ Facilities desf,~ned
1•.... .... .ate f -}~
TABLE OF ~C?IVTENTS
1. TClI~M b~t~NA~E REPORT ......................................................... 1
i.1 ~'R~C}I~(JED PR~]EGT DESCE~IPTI~N ...................................................... 1
1.~ E~CISTIN~ ~Of~1E~I'FIC7N~ ............................ ......................................... ~
i.~ INFILTRATION RATi=S/S~}IL5 RE~C?RT ............................. . . ................. 3
1.4 WELLS AND ~ERT~~ SYSTEMS ................... ......................................... 3
i.5 FUEL TANK~ .......................... .....................................................~.. ~
1.6 ~t.IB~EASIN QESORIPTI~N .................................................................. 4
i,7 AfV,~LYSIS OF COQ YEAR FLO~DD ........................................................... ~
~.9. AE~THFTIO ~C~NSTDERATIDIVS FQR, FA~ZLI`t IE~ ..................................... 4
1.'~ DC71~fNSTi~EA~+'I ANAL`fSiS .......................... . ..................................... ~
.ip ~Q~JEiVANT D~[JiATI~}NS~ E~kSEl~IENTS ...................... ... ................ 4
i.12 pIROPERTY C]1NNER'S ASS~]~IATIDN ..................................................... 4
~. EFt~TC?N ~C~NT~DL DEPORT ....................................................... 5
~.1 ~NSTi~UCTIQN SEQCIENCE AND PR~CEDiJRE ...................................... 5
TRAPPINCa SE~INIE1'1T ............................. ........................................... 5
,3 PEE~i~ANENT EF~C]SI{]IV G(]NT9~OE< AND SIDE RESTQRATIQN ..................... 6
~.~ GEDTE~FJNI~~1L AiVAL~`STS AN[] i~EPd]i~T .............................. ................ 6
~.5 I~1SPE~TiOiV SEQUENCE ..... ............................ ................................. b
~.6 CC]NTRDL OF POLLUTANTS OTkiER THAN SEDIMf=l~T ................. ....... 6
3. MAIf~TENI#~VCf PLAf~f ...........................................................
3.1 ki<C~UiRED MAIf~TE~I'AI~~E .................................................................. ~
Appendices
Apper~di~c A-i -Drainage Calculations
Appendix A-~ - Preifrrtiinary Plans
Appendi~c A-3 -Vicinity Map
Aq~pendi ~-4 - I=EMA Map
Appondi ~4~5 -Sails i~e~ort artd SAS Soils Map
Apper~da A-6 - Aquairl Data
1 ^ry^~ ~ ,~iy ~ryy .~a y~
Tire format of this report fellows the outilne pr~vlded in the Drainage C?~sign and Erosion
~vntrol ManuaC ~D~I=C) for Thurston ~~unt}r, 199 Edition and meets khe res~uirements
of the 1~'~~ Department of Ecalagy SkQrmwater Management Manual For the Pugek Sound
Basin.
~.1 P~{~P~~ED ~R~!]ECT aE3~R~~TION
Project Propor~er«t: iwl~rijk~ Deukscher
14Q1 Marvin l~c~adF Snits 307-~~~
i_~ceY~ 1A 9~351f;
~ Far~e~ Number: ].24131001 and Right-of-V'd'ay
i_egal Description: Section ~, Tawnship 18 fVortE~, Range 1 Er
.h'1, f Thurston ~DUntyr A
Total Site Area: ~.8~ acres
honed: C-1
Site Address: Unkr~o+~n
~ro~ec# (]w~rvF~w:
The Yelm pay Fare site is located in lfelm, Vl+ashingkon an€~ is berdered on the rtorkhe5t
by TaYrpma Blvd., an the south by berry Valley Road an~# on the northeast by vacant lots.
~~ Tire development of the 3.t#4 acre site will be cornpieted in kwv phases.Phase ~ Includes
the constr~,ctlvn of an 850[7 F daycare vuikh the associated parking en 1.7~ acres of the
silo, as wall as the required Berry Valley Rd frontage irr7prnvements along the entire
p~r~el, The remaining ~.1~ acres of tt~e site will be developed at a Eater date.
The Phase i improvements have been divided into two drains a basins.
slrr ,i
5tarmwaker from the north half of Berry Valley Rd and the orr-site improvements will be
eollected in a retch basin and pipe conveyance system and directed to err ,4quaSvulrl Fear
treatment prier to being inf`ritrated in an open pond located In khe s+~utheast corner ~rf the
parcel.
The starmwater From the south half of Berry -r`~Nley Rc~, ~sas~rr ~} rrlll be conveyed to a
ternpo~rary roadside diteh: for 'rrrfiltrat"ron, Once the pro{~erty on the south side of ferry
'Valley I~oael deveic~ps, drainage will be coff~ect~ed and handled by tfrat development.
Shia L'arr 1e~rveff
f~4arch. ~~1 ~ ~ag~ l
t
1
Y]
i
r
1
1
1
Table ~
[]evelapt~rent Coy~rape 5ummar~
basin 1 Bain
n- ite off-site Off-site
Imperviaus Ares (Acres) 0.7~ a.~~ C~.14
Disturbed Pervi[r'us Ares (Acres 1~~0 p.I}~ C1
Total ,area {.Acres} 1.2 (1,~~ C~.14
The proposed starrnw~ter facilities have rrot been sized ko Y~~ndle runraFF from Phase ~.
When Phase ~ develops, that develc,prnent will require a separate, st~ndal+~ne, stormwater
Facility.
#armwr~ter Tre~tm~n#:
Per ~ecti~rr I~2.8 vF the 199 DDS Manuals the requir~eti storrnwater !kreatment flaw is
based on the ~ rrtont~-~~# hour 51;~rm event. This event is computed as 54°lo of tfie ~ yeaf
e-rent. According to the isvpluvial maps in A.p,pendi AIII-1.1 of the €?0~ stormwater
manuals the Yelrrr aria f~as e ~ year-~4 hour ~kerm of ~ inches uuhich yields a 6 rr>;onth
errant of i..~8 Inches. StorrrtherE software was user! ko determine a ~ month treatrrrerft
flow of (].~.~~ cfs. See ~ppenrlices for ~torrrt~hed model output shouving this ~e~lcul~ted
f3nv~.
torrnwater tre~trnent wrill be pfo~vided by an ApuaSirl !Model }~S-~ Stormater
TreatrrterGt system, This rnradel wlll kreak ~ v,~~ter duality flow of 1.1 cfs, which is four
times the required treatment rapacity.
Basin
Treatment is nt~t proposed far basin ~ but a redu+ctlon of pc~llutlorr generating surFace area
mill be aecornplished with the proposed development. Currently 7,3~i~ f ~1f~ of the
1~,7~4 sF existing r~adu+ay) of impervlous area sheet flows untreated onto khe property to
the south. The proposed improvements. will reduce the amount of impervious area to
6,0~ 5F {~.~~ acres] antf cl~~~t r~tr~crFP to a ro~~srcfe ~rtch. Tie €#~t~h ~-'~~d ~rr~~ric~e sc~rr~~e
traatm~nt prior to infiltration.
S#~3rrtiuw~+#~r Storage:
~tvrrnvvater wlll be conveyed from the Aqua~irl to an open infiltration pored. Tyre
infiltration pone! will also he located in the southeast. portion. of the site and has been sized
to provide a minimum 1` of freeboard d+~ring khe 1~L yr - ~4 hr event (4.5t] inches}.
Shea Carr Jewed~
~Oarch, ~~31 Page ~
Per the r~carnrreendaticrns of tl~e ~ad~oy-Nntxte geotenr~at r~~rc~t~t see ap~re+rrdices}, err
irtfii!tration rate of Z[~ inches per hour was used for design. The infiltration ~orrd will have
a ~l]'~c5'30° triangular bvttt~rr~, u~rith ~ bc~ftom surface area of ~St} sf at elevation 3~4 and
atop surface area of 3,55 sF~t el~vatlon 335. This provides a kotal available 5tor~g~ of
appro~cimateiy ~,~50 cubic feat. StormShed software +uvas used to model and 5i~~ i;he
infiltration p~~and, Per khe model, a ta~tal volume of ~r~$6 c~rbic feet (akef Surface
Elevaticrr~ = 33~.f}1) is required to provide storage for the 1~~ year skc~rrn. See the r~raclel
o~utpu~ ire thc~ appendices.
~.~ E]CISTINO +C~N~L7ITI~~S
The on-site area is undev~fs~ped and ~s co~rered bye grass, shrubs, ar&d some tree- r€~~irT~~r
Douglas Fir. Mock the kre~~ mill be removed for khe project. ~urrerrkly the land stapes ak a
grade of less than three laer~~nt from the south to the north.. Flo starmwater tributary flaw
~ntcrs the site ire significant quantity. Thy current snip. on site has enough infiltrati~rti
c~pabiliky to easily abs€rrb~ khe existing site runoff from s~torrn events.
The existing roa+duuay is ~Q' wide v~rith no curb, gukiverf sldevu~lk or stormwater
irnprovecnen#s. The roadway is crca+~rned in the center an,~ the storm+r~ater generated by
the roadway Sheet flaws undetained and err~treated onto the adjacent properties.
1,3 IihlF~~Y`RAT~~II~ RATES/SOILS REPORT
The foil Conservation Service ~C) foil purvey ol= Thurston +roonky ~iassifi~s on-site soils
as X1~.- Sp~naway gravelly sand I+aam, Q to 3 percent SlepoS, A typical soil i5 des~rib~d lay
~S as follows:
"This very deep, somewhat excessivei~ drained soil is vn terraces, tt
formed in sandy glacial oukwasY~ anck volcanic ash. The native vec~etatien i~
mainly grasses, Corns, anal few conifers"
"Typicaliy~ the Surface layer as black gravelly sandy ioarny~ 15 inches thick.
Tt~e subsoil is ~darlc yellowish bro+~r~ very grav~ily sandy I~oarr~ about S inches
thick. The sul35tr~turra t+a a depth of 6i] inches or mare is dark yellou~rish
brawn extremely gravelly Sdnd,"
"Permeability is mnderakeiy rapid in the ~ubsvil of the Spanav~r~y soil and
very rapid in the substratum. Available watee [apa[ity is love. E=ffectiv~
rooting depth is 6~ inches car mare. RunotF is slow and the hazard of water
erosion is slighte__"
"Disturbance of kF~e prckective layer of duff can be minimized by khe careful
use of wheeled and traced equipmont__."
.Svi! te~kfnc~ was ~erforrned on-site to establish the expected in~ltratior~ rates of the soils.
According to dais r~portr on-site soils have infiltration rates of ~~ inches per hour. See
appendix far khe Bradl~y~Ncable irrfiltratian report.
i.~ 1NEl.LS ANO SEPTIC S'1f5TEMS
~J~e~ Carr,~e:ve+~
Marsh, ~~II Pege 3
Researctn nF VtifSt~Q~'s Jeff Logs shc~w5 no erstrrr~ ~et~s ors td~e site. ~~t~rtr~rr~~~Yt ttre
project. engineer wailced the site artd Found no si+~n of nay abandoned or exi5tir~g ~!re11s ar
septic systems.
1.5 FIiEL ~'AfVS
No fuel tanks are knovwn ko be on the adjacent silo. A review of fine DepartEnent of
~co€agy's ~eakir~g Underground storage Tanks ~~,iJST~ list did not i~,cklcate any eisking or
abandvr~ed fuel tanks on the pra~ect site.
i.f SiJB-BASIN !]ESCF~I~TI{7N
There is rro off-site drainage tributary to this roadway.
1.7 ANALYSIS ~F IIQQ YEAR FLO(}D
~f~is project has trot been identified as a 104-year ~uod hazard area. A FNMA FIRM flap €s
included in the appendices.
1.$ AESTHETIC ~QNSIDERi4TT{?NS ~4R FA~IL.ITIES
All disturbed pervious aria wlll be vegetated errd €andscaped, The storrn+vw~ter f~~iliiGy vuill
be landscaped with hydr~~e~d or socl.
1.J [)C91Nf+~STREAM ANALYSIS
All stvrrnwater generated will be staved and infiltrake~i pn-site. All retention facilities have
Yaeen d~sign~tl t~o retain end infiltrate the 10~}-dear storm event. ThereF[tre, downstream
facilities ~ri11 nok be aFtected try this project.
~.iO CC]VEMANTS, D~p~CAXI~I~IS, EASEME~FTS
On-site drainage facilities will require routine maintenance. A draft maintenance
agreement between the ovalrb~?r and pity is attaChec9 in tl~e appendices that +~.~ill ai€~w the
City to access the fodiit~s. The owner is responsible for performing regular maintenance
of the storm dralnage facilities,
i.it PRCIPERT1f ~7V~ifNEFt' ASSOCZATIQN
For this praject~ no speoiai pity requirements or covenants covering landscape,
maintenance, signage~ stormwoter and slte rrtainten~nee will be applicable. The owner
will gerfarm maintenance of the lan~is~ape end storm drainage facilities.
i
Slte~ Ce~r~ .Jewefl
March, 2~p11 Page 4
~. Ei~~~N t~~1fiR~~ EP~t.T
~.1 C~iV~YUCT~[]M S~+Ql1~NCE AN1~ PRCE[~U~tE
The proposed road ir~pfoverr3~nts urill Include grading and erosion conkrol measures
desigrsed to contain silt an[i sail v~ithin the project IimGts during cvnStructiorl until
p~rrr~aner~t vegetation and sits Irnpr+~vements ,are in place. ErcS{anfsct~lr'n~nt~tlon
conkr+ol shall be achieved by a combination of structuralJv~getative cover m,eas~res
and construction practices tailored to Fit the sike,
i3csk Management r~racti~~s (B~1P's~ ~rlll be emplayecl t~ pr+~perly clear and grade the
sit2 and to schedule corG~tr~ctivn activities. Sefore ar}y ~:c~r~stt~c~ctrorr ~7egrrrs errs~t~,
erasion contra! facilities shall first kre installed, The planned construction sequence is
fvl Sows;
1. schedule precvnstructiorr eonferenc~ avltl~ khe City" contractor, prc~~ct
engineer and canstructivn staking surveyor.
~.. Install rack ~or<stru~tion er~trarrce. ~#se ~" to $" diamel~er quarry spells with
1~" rr,nimum depth.
3. Install filter fabric fencing in the locations s#~owr~ an khe plans.
4. Prvv~~e inlet ~rotectic~n around existing catch basins.
~ 5. dear site (asphalt r~rnr~val, grubbing and rough grading}.
E~. Maintain equipment and waken supply for dust conkroi,
7. Designate an area fir ~uashing concrete tr~clcs to sr~ntral tine runoff and
eliminate entry in tt~e storm drainage system.
8. Inst~ir underground utilities,
9. Provide inlet protecti~an arc~unci all new catch basirr~.
Y0. i'~Fair3tairr e~i erx~sra~ C:4f#{'fY1+ facif~tr~s t.rrrtr~ t#r~ errt+re ~rt~ ~s 5t~bii~~ed c'~J'1~ ,silt
runoff ceases-
~.~. f~P~ING ~EDI['+l~NT
According to SAS nrG-site soils belong to 15~panaway gravelly sand laorr`u" 0-~°Yo
sivpes'" and ha+~e a slight erasion potential. Astable eonskruetion entrance is at the
western entrance to the site, The ecnstructinn entrance mill prevent vehicles frorr~
traclcir~g soil away frcrn disturbed areas, If sedimenk i5 traCk~d off site seclirnent
will, an a daily basis, Ise sv~~ept or shoueled from paved surfaces and net waasherJ Into
the storm system.
Shea Farr Jews!!
rWarrh, ~~11 Page 5
w
defter f~~ar~e Per~~ing av~~! tae ~r~sta~l 1`a itra~ sediment bel=~re runnfl= exits t[~e site. In
adrkition, inket protectiran gill be installed around akl e~cisting and new catckn baskns to
filter out sediment before runoff enters tine storm 5ysteen.
r~ kh rain season fr r~ r 1 khrou i1 N1ar r rrkust
[~u ing e y om Na efnbe g ~~ 31, the carktractc
cover any disturbed areas greater than 5,0~~ 5f in sire if they will be unyvcriced for
mire than i~ hours. ~lukch, Bedding, or plastic ~~veritlg shall be used to prevent
erasion i~ these arias.
~".'J PERMA>PdEI'+IT ~RI~S~UN ~iw1Tl~OL ANU SITE RESTORATY()it+l
All dist+~rb~d areas will be paved ar landscaped with grass, shrubberyf or trees per
1=e land~ca~ing Mans.
T ~.~ GE~T>E~Hi1iICAL ANALYSIS APV[] REi~~7RT
done of the storm drainage facilities are le~cated near the top of a steep slope.
Therefore a geokechnical ~r~alysis Fc~r slope ar sail stabiiit}o uvas oat necessary.
2,5 INSPECTION SEIIEN~E
In addition to required pity inspections, the pru~ect ~ragiineer urlll inspect facilities
related to stnrm~vat~r tre~tmentr erosion control, Btvrage+ and c€~n~reyar~ce during
corrstruci~ic~n. At a minirnurr~, the follov~ing items shall be inspected at tl,e time
specified:
~. The erosion control facilities sha61 fie inspected bel+~re the start of clearing and
grading to ensure the following structures are irr place:
a. ~cnstructio~ Entrance
b, Filter Fabric Fence
c. Inlet proteetic~n r~F existing catch basins.
~. The ~anveyance systems Wilk be inspected af=ter c~n5truct9on of the Facilities,
but befr,re project campletic~n to ensure ki~e fpll~win[~ Items are ire v~rorkir~g
nrd~r:
a. Pavement Qrainage
b. Catch basins
a. ~ rye racii
from sec
~. Tk~e permarkent
is cvmpl~ted,
~atrnent and storage s~sterrfis ~f~a~~ ~e rrr~~ected ~r~rir~r~ ar~~
ko ensure;
is constructed t+~ design specifleatians and that protection
ants in place.
e festvrakian measures shall be inspected after kandscaping
,~ final inspection shall kre performed to verify final grades settings oaf control
structures and all neeesB~ry information to complete the En+~ineer's Construction
Inspection Report Form. This form must be c~mpl~ete~l prior to final public works
construction ~pprnval,
~.6 Cr~NTROL F POLLUTANTS OT~iER THAN 5~D~iw1E[VTS
The cnnkractor wall be rwquiretl ~+~ designate a ~rashdcwn area far concrete trucks a.;
~vekC as a i:~rnporary stockpile area for con.~kructi~n de~r15. Vehicle Fuelingf washing,
~r rna~ntenance shall occur in designated areas csniy.
rhea f ~7C( ,~P4VPff
~rr}a, ~~1I Page 6
1
a MA3N~ENAf+~~ ~LIV
3.i IFtEiJIREIC~ MAI+~TEi11Af~CE
~~ fc~llc~wving pages c~ontairk rnair~tenance needy fvr most of the uomponent~ that are
part oi: the project's drair~ag~e system, as well a~ fvr 5vme components thak the
projeck rr~ay not have. The checklist should he competed fvr all system compvnent~
ors the fc~llo~wing schedule:
M. Monthly frtm November through ~~rs!
Q0.. QrrCe in lets summer ~preferak~l}~ epternber}.
S. ~fiter any mayor storm e~rent fuse ~" in ~4 hours as a guideline} ikerns rr~ariced
,.'° only.
Using photocopies Of the~~ pagesf check off the problems investigated each time pan
inspection vas performed. Add comments on problems Fund afl~l actiur~s taken.
Keep these "Checked" sheets in the files as they vui~l be ~~e~d t~ rite an annum report
(due in Mays. om~ items do not need to be lamed at every item air inspection is
dune. Use the suggested 1=repuency at tFre ~eFt o~ each item as a guideline For the
Inspection.
The j~rrlsciiction may b~ called fnr kethnical a~si~tanc2. f'fea~e do not 1'resltate to call,
especially IF ilk is unclear wvhekl~er a parklcul~r ~ituatipn may be a problem.
S~°~' C~rrJewel~
~9'arrh, ZC711 ~~ge ?
A']'~I"~'I.~~1T "r~": ?4r1~1f~1TE]AiV~'L. PR.C7R..A
co~.~~ ~~~~ r-~~-:T
]ns~eetic~n Pcrioil:
~l~~it~E~e~~ ~t Sheets ;'lttac~Y~;d;
Date lnspecte~ :
name of Lnspccior:
lnspce[~ar's S~i~~~Leore
f'a~e I{ - 13
ATT~{HMENT „": ~+IAJNTENAN~E PROGRAM
Mairrte~~nce ~Ie~klist ft~~ Gfosed Detention] ~st~rr~s ~Pip~slTal~ks}
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rhst LLny jxpini w'icll tiehq'`.g and ~L'slirlenL Nluggad
usnt can t 14150 $~.1181a'C iLTC.'1 LO C{}~`~~j~r:
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sedament di~lvr f~9mFle:7?-lnchsG7rs~c~nl~'.+~uCd ~ L:~nLLLtiCi-ltyPuhll€VFprkg€argtliJcuJC:
tekLlire wCrunin@ when sedinJCnr :zaches Lleplh c}i on secEimcnt rr[lrn,xl atPld i]"s5pu5uC.
] ~ ruches.
rk ~u LiL': ,4ny craC k al lowing nl~L~w1 to leak intn fBCal ily A1C JUJ[LES be¢n+el:'n luJlk.~711rG scc#14~IS all@ SeAJ~d.
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heist p~Lt 1}f
sly ~JrapG Colstact n ~~F~SSC+~tml el~r. inexs for evul untion
~5 h9mahu~ C=nvcrrut In ~4wV@C ri mJaa}ng nr nnly ~rriallw In pCx4:e. Ao~~ \9flnllnlp ly e~pgpi
Ian ~penJnanJ_~}Ie ulrcsmaill[enaJxe.
A L.utkine S7ee~lbn}41}~ cAlsl:{7[ ape}xLl 64~ e}nc ~'ldriJnuTrJ cpeJ9x N~ItI] 3+Trl~+=r mnlc
mrcF.anism nl®Ilrmnor~.V }~r~aus walh propurtpnlc, Bolts
not u+nr'~.in~ is'$o 44'assac krara Gs_ss mall 1??-ands oI t~uza~C
fmtl++ nL~t ~ ,z+^ m sa?I f-I{scklrJ [ed5'I
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9},ry11k 11~y kit} puwwis aF l l ft. f nrc7Ll ~S i~r I.cep CiY'•'G`T CJ3lL hC Tpkl{M"r~ Ail{] 1 Cu53I,~]CksS h}' U1NE
rnuin~r~tlce 15o}L
f1~JJ:0~'a! raver l i'[trn sfiulRn aff e5s Ln n!~Jn[cnulxc
~ Ladder h+CB]n[el;alrLCe ~rsan judges t}75t I~t is unsrJfe I.a~er mc, da°.rti$IS SC9LL{jLL71]Jj and nlCnws
rungs LIlti8f6 dlac lu missing r{u:gg, m I~~I IgJLren~ Jl.LSLr or m~ Inr~;LBt]a:C prrsuns sale ncce94
tra~rkc.
Jf you .Qe Imaurc vrheLller n pmi~lcm ik IRti, I1~~34ir CLSLJtACI ~]¢~ j41! Li(EI{:llu9'J and LSiC firfr tCC~lnlfiq~ ~,j+ J+~La]rEf.
Cummerlls:
=Annual (h1uicll ar A]mi ]arctomcd}
~i = ~i~+ntllh~ {sec ~cCreciuCa:l
5 ' rLlter m~l;or sLOmis
1
}'~l~,l: - ~ ~
J
i~
ATTA~HNIENT ",4" ((~f~fTINUEC])
h~aFnbenclnce checklist #~r etch Bairns end Inlets
i~
1
S)i i2LR>:
S}'slem + G]nJi~uoa'1'u Cundirsuns I ha[
!'' •urnco' Feature ~ P7nhlem Checfc i~ur Should E~sist
M.S [;metal i-ra,Rh, d,:l<.rng„ Tca~bor;3e6ru in !'rant of"ihe cat€I~ I]~h3 No trJSh ur debris Ixatcd rmm4d"yl[Cly In Iruul
Add 9P~1l1Lertl openusg is hlccking capacity by mGrr Lhun 10'SG. of catch has in npCnil~g il`ate i9 kept Crt7anzus!
ul U[ UCL b71ti7R p llnws NlAler I ri eY~[~~
M Se.Jsltac;ol I of Jebru d.m tha L~asrn~ rhar ~ rC~e~t4i ~Vo sexlurcenl nr drhnv in the catch ha~iu, f-~tcl+
1%3 [he JopLh 1'mm tY,e horhim ni h~sut to itaVr~ L basin is ;1u6 ouc xod clan,
crf the luu~vr i ~m,s of r~t11 t+f LJx halm.
?.~`a' T[~~zft ud Debris 3h any ~n€:! nr ~rirc hl~+,Jrl9'i~ ItlScf and pullet lnpcs fret of wish nr dChr[g.
mur~ shun 1,~3 oi'rtx hC! ht.
.~+1 S tru~hual C'oRS~t of frAlll~ e~cieoJ3 more than 31~f inch ~~ Flarne is e4en au[h curb.
damn~,c tJ7 Curb Cx~ into IJrc srrert {it' apPl icaha~)
~[ 9[fl~ ~tL[Utfr
slob
ht `Tap slab has lwle9 Inrger dean ~ 5,}Lands 1nChr~ cu '['op s lob i9 ffre oFhnlcs and ~rgck8
crocks wfdor NraR I}q IliCrl (likf~rli is to mukn
sure oll mo-tcriaf IS r~1t411i11 ihL4lhe 6usm
M Fr~tne rLOi ~iLVng !]uah~ cM Ind ~leh, I e, finsmc ~ s~tLne flush on to-p slab
8eparmhnn of mnrc than .~14 tl}~ aI Ikte ~ramr
from thi m ~l~h
.4 CrsCks u~ Ctarks u~h9w' lhun 9 ~' posh and I~nfpC[ 6kl;hu 3 lius in rep9ace~' ~ rcpaircd fm dcgipn .Sfdi1~~,9Sd5.
I}asbL fee~anreuidrnccoP~nil~rriClCSenfrrlhgcukh CnntnrraPrntC:vinlw~CllgilfC~rf~e~4'97u3[eon.
wulln~~tfxrm basin rhraaugh CiaCR.. U[ Itlain[enunce person
+1 CS thti6 s~11 Lecfare is unsound.
r1 L'mck€ ~~~d1c: ion I .z inch ~~d I(~neer Lhun L ttiR cra~kv mnrc rl5nas I?~ lush v.ic6e xt lheauurt
Font at I}+e j+dirrk 64 8[74 oh4r,~ L}u1~oL pype or any ~f l ole4'oufle:: p[pc
~uirlcnp„ ~ef;gJ p~rtix:]ew etme~n~ cnSCl~ ha~ln
t]kIUU x[:74:149.
1l SeuJe~mnL~ 13u4sn hay ~cta:d mare U1n.r1 I in4;h ur has rnrntcd FI3Ri[7 [e]lls4etl [iC re~iur41 L~ Jesidn standordk.
muuli mmr m+~rcthlul.'II1ChC5ou!oCul~ nment CuJ:l~ctd rufc~sLOnulen Weer [nreue4luatiRn.
41,5 F~rC h7?ard rtl Pt~es~rkr ui chemn=nls ssch a4 notul74l ~'ts, u11, Nor color. odpr. ur s3~~d~c Rxyin 15 Jug ouL ans!
uikLel soil Rr~l5line. {]b~oxaous culpr, oJu~, ur alucrgr cl€an
Jluu4ln noted.
49,5 Cjutlct Pipe. 49 ~'e~ ration Ur Rxals growing m inlUlvu[[ei pipe No vr~:te~s~on or mot ~nut14 pTC:xertS.
cl~};~~~~I ~.'irh ~uuv.s ihuL is more t!ivn Rr*€ inclv~; ul I! and less
x'g ~kat141S lhwi 7ix mr5e& aaarL.
1Fy+~u are uns~lrewhtshera probrtstl eal.isis, ~leaxe cort[a::[ i1Le 1ur4~iLa:uoo and ask for technical a~sistA~xr.
CammenLS:
A = Annual i March rrr A~1 ~r¢ferrrdJ
fw1 =M4ndl~a {5oe sCheYftir~.)
S - r141fer n>afnr storms
~'ag€ - 18
1
~'i' I~C4k.+~1~~ 1 ulAe' ~La4J LY I ~'i~S,J ~~„!~
f+aint~n~lr~c~ checklist for l~filt~~fit~~l yst~rns
C;~niiit,ona i~at Sk,ould 1-~igt~
32e ~9~inldnanr:~ C,6ecklssL fur Pcmdv.
See °~Lemle,xurxa ~"heckii~ :i,r Pnrrls.
5~ Mainlell~lx~e C~ckli}l i'ur I-~on~iv.
5es1 I~aih6k7Letl5W CCteuk~ist Cur Purxis.
rl `~dsra~c urea Srdnrr~ot huild,q,
+n
stem A :rsll td\[LILU test irulit~~es !'uc;l ity ,s ,x,t
w
rk
1
r
d
i
~
h
li
~ 5LriirrlCirt ~s relnax~ed ~5otlloo L~:.lih~ is
l
d
'
w
sy p
l bg ~t
O
s
rs
~rir
cupu
i
s,es nr a
u:c
inc~rrtrtlc•d~si~
~~d e
can~
.~ [I13t Iflfilh
8iiuu 5;+~[rm
urks
ucaordm~~,dr
~i*
n R9q
~ill3ent[[~
ltl
, .
,
.
pp
g
urra is irst,l l ed rn rcducv srx9irnc,rt
Lrans Ufl ihLi} !u[r[[;+lsUrr ale~°
A $#QI ale BYea h vm: h^.cLLms u;.xt tindrq[es fa~.l i[±' is +:i}L AcLdi~unel vs+l umc as added thrp,agh
dl'~~rSS slowa+~ xx~+r&ir~ ut its d~ig,xcd Cb~:+~ri3iues ur ~x'u5 euuvaiarn m~xoV,dc necde,3 s#axra~;t
{n,ssrfi t~a:~ xR
hu~.usbar
o+'Caflu+vs ;~1Lx1rcC9l}~ cles,gnexi Soil ~ uem[eai :ieul r;}Le~ul led tt~ im{amve
dra~na~c Con[ac+11r. Cit}~ fu,
irEonnatfan an its
rc
uirs•n4nrs re
itidlr
.
q
g
~,
rxcuva~un.
1'wl `~ea.lunrnL rITIV' SC+~IlYl~nr,~iLt~ Behr i3 Fillu,@ a+gea to 1 V'.~ nf' {-1csn nu[ 5,111)p't+? ~'x'Si~jL rl~p[h..
tr8pprog 8teot doplJ: frt+m surn~r hrr~*pm 4d b4l[i in uC vu[Evl
jlrpe ur uhs[rtu.-Lrr~ tlrnv irtn'hr, cnnnt~rt
i~
~NC'Timo BPdlmeat
9t'~
il,
au'r7inut 5tormvaLe= erners infrltr~fiiq~L ales direcLi}'
wiLhuudtrtatmcm :~rJrl a lrugprnQ area by cnnsLnxting a
F
li
f
nlid
5
pp
g
Srese~,t s,:np
arsett
nco
s
:~.
8ate
Ll
l
l'la
li
C
~ el
uigusek
rtamre~LU
cr
tu
n~toct
{" i~~ fnr ~i liri; in4e
M Rnck fl~k~is ,`,cdiment a~ L!v w+suul rnsprc_~Mm Ii:J: nr nro- tk.~sur rlgwe kLepLuc:e 6rati~et «x rocJc filter
dehn~ iflin~ l ,ll ~r[eY ~.lr:i in hrsvu rsin smnrk,
Il'yuu axe arisurr whe[hGr a prublom exas[~, plesx~e cuntui:£ t~ lurisciict~on and ask far tachni~ai dss IS[87o[e,
t=nmmrnts:
A=Ao-nual thiorch ~ .~~ril I,rGFCrftd~
f41 - MunihJti~ {see st2urdule}
ATT,4~i~NT "A" (~NTIf~~ED}
~~ N1~inten~nce ~~recklist fc~e ~nv~y~ns;e y~t~ms ~Pip~~, Dit~he~, anct ales
Freque~-y T3iain~gC
.Svsi®ra Featiuc ~+ Pr~111sm ~nlydYtions :[Y ('I1CC]c f ur Camdabnns Thal 5ltiould Fx 151
M.S Pepe >c;?nnent ~ r~ccurssulaar:J sediment {fine exceeds ,n~ oE11ue ['tpe S:I~ared at Lall s~iYmeast and cicbrs.
dKbeis daumeer_r of 111p I
M Ve~er~4lon VeeclaLitYn that redncr~ tig4 11501'~1i5last UI
woiee khrou ah i All wrgetutinn ecmrtved sn vst4r ilowg
Free ifcrn Rh pi s
A L}~mukeil ~n~ud,
h
r
a
~
b
d P7necetlv~ :011tu ~ aS ;lnma~;ed, rust is caucinp,
h
5[7;
P
' Pipe t~pui.locl or repfafual.
wl i
, t
l s
l us
~
~M rnurc l
an
+~ c
ct~rloieti0is 1a an}° part uE
i .
I
j
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Anu dmt thRt 9igLIY~4Aalily enipecks tluu° (i c ,
[
kh
h
'
I
1
pip4 rgpRlYa?3 4f lCplaC~xl.
_ c
eu~c7srs
c ~sg gCC
~311 ~tCJ U
]}
~i~
make lhnei _'LI"fa ~.
i
-~1 Pilla k18S PL,IJU] CY~cks ur Ir~rs ikllnwrng
LIndS'+Hta71C81rA ~ PI}+C repal[ed U7 fGpLaC~d.
[W,S {Jpera dltrhes trash r!t dchei t rttllisp7ri~ oC} Lrcl w~ia su~Il 2~ ~ra9g
clip~i+I a,3 an Ihlurl~s cnLU t,a:,in W.Insi$$fitly ~~muue Ir•.ash and rlrbns and diasprsc as
ppn'~'4'ilsed b4 ~14w 1Aras~ ~°]aalca{~emcrat
accuenulatao-n [Yf nnn jCVr~7al}l~ Irirterua[5 ash Suzan.
IL5 ^ IlL-i9. ~95tIC n7Ct~F~ Igy~itt, .illi~ iA]II.Led 47.
M Sc+taanenthui:dylro ACelemul~x! seeLment diet exceeds YI:.S~ nfllle DilGhclcaned of all srdirraent and dehri9
dr~i n do h. ;n drat it rna>:c]ses dr-5i
~~ ~VtgfltSLOh Ve etaLi[m t c ~ , vsxC~Y' slsrtll>s OY S3plYnk?,s) khoL
fL'JbY9 li ec muvemrniv +Yf-water t11r{Y5L~f5 1Vuter E7nu'y fr;clY' tl'IfOwElt d ItChui.
111 ~ v~~LULiuu ~hrrutd he ]e[t alone
dit
F .
c
lcc
M ~e~;~inp damage Sar k'unds ~Jrccklrst See f'aaule CkceklYSL
m, sl n .
:'4 L'{txk ~aod uUi
~f plaa= nr h~inineenanr.G p~r;pls C7ua ser uaLi+e wLl 6enealh
the rutJc limeag Replat~ rxacl€~'p deSigts ~ilrhLC38Yd.
missan~ if
a , licao e~
Yanee Catch h~avina Sce C'afs`ls 1~38itu~ Cllec6Jast. See Calt}Y D~3uax L`hcrld isi
M,S SwoJes 'FracJs & debris S.^e ahnve For T)itch~t ties akaos'e foe i]ii4.he~.
i4! Sc,fimtni huildup Sae 3buka lur 1}eich~. VegewLion aan}' meal m he rcllfant~d atY~r
a:Jeenioar•.
ld~
ekll1nn nUt Liras CSSVCr 19 9
Lg~
15+
1
1 ~
' l
t
i
~
'
:
J
l
h b
g
Rrmlinp or
~ ~
i}r arras are
a1
14
ee1
UVerdeuwrac wF~iiti ups-++;d4~ veg~~tlm5 r
er~Y
c ~faY
j ~:Yj l4
f~Se6
S
an
mu
e:
are
urx°as. ARamtam rags hci33llr se e.
overgrct
vn IS]IJFLitLUlls UC5 iris Ear 6r4 stnrmu°nttr
treatnxnt 1~Ci71{1wY2 w~u~xJy grcrwLb,
rccontrYlPr and C~seecC .3S neU;a~auy
T~i,S l:ro5it n ~lrunugc
to si o Sec Pnnds L'lieekl is[ 5cc Pnnd~ Che4lcl inl
M {'3nw°era~rrn }~y+
Jaumem~merto
IrLCOr~i
%i4ib~e use Slva~le has 6eo~ tilled en aer hln¢k~d Ir4° gJa~,
umodPlle,slullLr~iy,etrs 1!'passehfc, sllcair u°iqh h~1~;p~er NLd
I~giY~-1LFwLyu'aleurrnhercst}.ired.
C
Ci
°
~ amta[t
n
t+.7 rg~siarl. pfub~eral ilnoL
rceteh°°cd vtaCunisri w
14 S~.~ale does aout
drain 14'aLer stnr~ds in gu°~Ec uY R+rw wclacuy ir. veru
sluly. S4agnatinn rc~ti~ A Buis°~ 4' :r48y he nr~ded L~f tihrc5: eradcv.
CiregJes nee: tr+ 1)e in I -3°/n rnug~ lr
~a4xsl~Ie. Iat~c es less than 1'Sw
wu5eFr}rs4n,9 maW Is4ed [U lat in~Llttled.
Tf}°ou aie ueLYUYt s+,~[Ixee ~ pra+bleah racists, please cuurart LJIr luEia~iction and ask tar e~ehnii:~l 35SIS&i~:G
-
{~nmmen?v
:k =Annua[;ARarch+ar rkrml prefeared}
M = SiemilaJv [sec scheeulc)
$ -}4fief 141:9~ur auarra
1
1
1
A~P~fI~[~I3f ,A-1 -
pRAFNAG~ CALCULATI~kV~
=~ppen~ed on: ~~~Y+~~n~la}~, I~Iarc#~ ~~. ?[P11 i{r:i]?:~1 ~~~1
Z,~"~~~,~y~'~~~~~~'~+ ~,~'-~~r~l .~~.~~+'~:~'f.]~ 115111 ~ll1S~ ~~ DIY ~'#IFC~I ~k~~f1~
Start cif dive s#.oeage:140 ft
~'Ia~ch ! ~ea~C ~ f~1~~ I}eptl~ -
Event ~ 4~'0l (~t'
'
~ Vol `l-tee to Empty
s} ? {~fs~ ~ eft}
(cl [~cft~ ~hr)
'4i~fTH ~.`?7~ t).? l`~? (7.,797 151.53 L ~ U,C}(135 ~-Ci~1~r3
~ I{}0 dear l.Fi{}1 [7.75~~ ~~3.1~_3 ~~3r~,~59 (1,t~69 a~.0~.~59 i
11111II1A1'~ R~por~ of ~~I Det~errtiorl fond C)ata
Fro,~eci l're~+ips
Event IPrecip {in)
BAS.IT2
[P~o] ~r~~~~ [TYrlE ~ ~..~~] ,~~ [ ~~i~rT~~] [~~.~~
[PJ~.C~] Usioig [T~c"~'Elr'.,f~.+~.~".] r [C~ O1TH~ ~~~,Q]
[PR(~] Usi,~g I'T~"PE1.+'~,R.~~'] sal{7{}ye~r] [~'~.{-1]
~PRC]] ilsin~ [TYPE ~ ,~-r~C] As j I t~~} }+~ear] [?4,~]
L"~i;~ID
- Pes~k {~ Pc~k T P~a~k Vol ~ :~r~a
asn~l3 ~ve~t cfs) i (hrs .~~ etlriadJL~ss i l~~Entyp~
( } {ac-eft (- ~)
~ -_. -_.
r'~t(~ ' ~' ~ t~.74 ~,~J1 x.1{7 .-_~ t19 I ~~S T~~'PE1~-'.RAC.
1~40~lTH ~ - - -
~, ~ ~
PF~O l~i~TH ~ 0.?74 R.fll ~ ~-I()~8 ~~ x.09 TYFEl,~2AC:
;PRC] If}~ year 1.b~tl r #~-C}1 ~0-;54 x..09 I SAS IT~r"~1~1,~AC~ I
I~r~~ ~ t{~]eae Z.C~t]l $,41 ~(1,5~if~~ ?.~4 ~ SAS jZ'~r'PE1,~-~C~
~ ._ .. _ _~
13;hLiT
~P fl~
GSTEi}
r
f
~ie~~a~d ~d: P~!C~
f)csi~n l~~Iethucl - SCS - `,R~iinf~ll tw~pc _i . --- TY_PI=1 f~,.I2r'1~' _
~~'~~ ~fF~V 1f~,'C1~) !"T~lj3 (Peaking Factor ~ 48~.+~0
tarrri Durat_ian --_ ~.(lf1 his ~~hstr~etar~r~ ~:o_eff - (}-'?~
(Pervious ~irea ~ I.I~~ ac CIA ~ 1,01 as
~Pervinus ~=i~ ~7~.t~U - ;DC C' -- _-~~.~3+J .-.---
~Perv~aus TC' i (1.Cll~ rrnn .DC' TC' ~,(~C1 min
T'erviaus ~ +Cu1c - - .. - - -
Description ~ubArcu Suix ~n
I PERL~~'IC3L`S I i.D~ ac ~ ---
7~,0~
l~et-~ious ~nmpo~ste~i ~"~ (A~iC ?} ~ 7.04 `
--- . _ - pervious TC Calc - - - -
T~p~ Ilescriptiau Leah I Inge ~ ~C`oeff ~ N~is~ TT
,i,~- - i_.. ~-{}0 ft I.. +~,~J~`1~, 10.{} ~0.~)(~ in II~.~C1 ~~in
~ E~ervious TC' 1~.~{l ~nin
1
DC~j - Cdr ~.alC
D~SCt`i~ti~n I--- U~?r~r@~
~_ lid°11~ER~~"~C~L~ I i.f}1 ac
- D!C Gr~ropsited ~ (A_'1~IC } --- -
Tree ~ De~criirtioa
hee#
~r Sub cn
+~~.UO
Dcr - TC' ~~~ - --~--~
ilcngth I.+~p~ Cae#f IYlisc T'F
t~.~1~? ft ~ ~.I~°1`~ ~ 5,[1 ~ 0.~(l ~n ~ ~.Oll min
Per~%ious TC' - - - - 5.~~ tniti
)<[Yl}LIT ~U1~~11~~L-itR~r"
[~ '~i~)N'1"H au#] [ill{} year c~tirt]
L5TE1tiD
~!y~ID Yea~C (~ {cl's} ;Peak T (hrs) ~Pealti ~fol {~e-ft~ Cant t'~reu (a~)'
] {}f~ year ae~t f1.74? 8,~ ~~~i4 ~~
~ TC1~ R [,li '~'
~ PC}i~ Q->~}~ D~
i-~TE:~iil
l.ccord i~l; ~(~~I}-)E~["}r~L1
~D~sc-ri~: IT'f~tc~~ype l~ec~rd ~Increi~~r~t U. ] U
tart EL iEf9U.c~0 ft ~~~ax ~I, ~
~~'oid Ratio ~ [ 00-(}[~
.
C1-(~(} I
~ ~.t~Ct
~ t .(D{l ~ i5~5.C~~1
4.00 ?? 57.{}x}
~.~}~~ 3U{~R~.{?0
~t~a~-tc~ra~e Type ~l~d~ .
DI1=iLlST'
[~T»>~ ~
lnfiitrati~n - _ _ .. _-
Dcsrrip: °Prototy~p~ Strlicturi~ iner~nYent ~ ~ 0.10 f~
Mart El. ~ 1 U0.{}0 ~t ~~las Ei. J 06.0 tt
f nfiltratlan ra#o - . ---- ._ ?C~.C~O inrhr ~~'P >4~ultiplier 1.f]i} ..
Lic~ns~:d to: ~ng~~rti4)u~ y~teu~s, ln~.
r
t
1
1
[l
1
C
1
Id1PREAIDIJ~C A.--
DRAINAC,E PL,AP!
+en~sx a
- - ~*aswsrn+w+vu ~.: _.ow,.-~ h01911'H{ih'A 11'[i4 L h\'~
i~~iSt~~400 ~ +~`b ~ 13 r
S
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~ ~ ~ ;~ ~ 4 ~ ss Syi
a+iO'O~~ ~' ] R f l
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fl~
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~~ ~ ~.r ~ ~ ~ ~~~
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ti4' 2acr 1 .. 1:'JeS i tCl~'m~
+m~YV..711IM5vW.1C ll Alit •n 11~_io~a~u Sri f{_k~~'~l "+~i
v. ~~r-r~a~~-'DNS l=~~~$''$ ~ ~ ~ $ ~ E
r~na~us~nm~,n~d ~ a a I s
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3411 Ma~Tlluf~k,3[1 County, 4L'aShirtgkora
~~~} ~fll~ L~BFIC~
'°:' ~ Thu
7~ ~Jla~ua Ily laar;~y tiny sand, 3 l0 2,g
15 percent slopQg
1 t 0 Spa~awax~ gravelly sandy loam. 91.0
0 E4 3 pac`t~nt ~opea
111 ~ Spar~aw ray r, rava~y sarsdy 3aam, 2.b
3 fa 7$ pereen# siapas
iii `- - ; Spena~rfy starryr sandy loam, fl :.2.5
is 3 percenk glcpe~
t 13 .3panaway strsny sandy epam, 3 ~ _g
Eo 1 c pen:ent slopes
I ois~s fear r~re~ of Inae~es; f~~ll I 1 1g,9
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SUiS ~lakurAl RQSOUrcea V4'e'~ Soil Sunray ~,4 fis'16+~E1G8
'°~° Canserwa!#on garvloQ htaii4rlal Cncperaklue S4-al Surwe~ Pa9~ 3 of 3
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1
"sprinklers can be used, burl, a slow application rate Is needed
fs~ n-,I~ilmiza runoff. The amounl vF water applied should tpe
sutTrcient to wet the toot zone bu# small enough to minirnlzs
If'oe leactring o{punt nutrients. The application rate should be
adjus9?~ Co the available water capa+~ily, ll7e'~!aker IiyL'~ke
rafe,.arrd_t~p Heads of the GtOp, Animal manure can he
appEied perlndically ~i~rring ii;e grouting season, Areas that
receivr~ heavy applications should be harrowed ak least once
a year.
TlMis urtat is tivBil suikvd #o harnesikes. Pebbles and
eghbles should he remoued, p3+YlCUtarly in areas treed for
lawns. In summer, drrlg3tion is neede€i tar latvn gasses,
shrubs, vines, shady tries, and ornar~tental trees. Hulett,
fertlllzer, and irrigation are needed ko establish Ra~+n
grasses any other small-seeded pkants,
'i-he main llmltetlort af#ectirrg sepki~ tank at~sarpU,~n fields
Is a poet filtering capacity. If lire vensety of housang~ Is
moderate or high, community seyvaga s}+s9~ms are needed
toy pre~~en; the eantaminatian a# water su~rplies Mused kay
seepage from ~nske se'~~ge disposal syckerrrs, Cu#banks
are trot stable and ere &ubject tv toughing,
f~ouylas-fit is the main woodland species on t#tis unit..
rlmrng the trees of IirnCte+;l extent am Or~gorr white oak,
lodgep:~le pine, and red eider. Clauglas-fir and Swokdl pails
are Brawn on Cnristrnas trees plankakl~ns, ~n the t~asis 4t a
i(}Q-year site ~crnre, the r7~Ean site iri~ex fvr flr3uglas-fir=s
f ~f]. Qn the basis of a 5fi3-year site cures, it i s 108: Tl7e
hrgiiest average gr^vrkh :ate of ire unmanaged, even-aged
starsd of ppuglas~fir is 1 d5 eul]ic feet per ap-$ per year at b5
years ~# age.
This soil is suftea to year-round Itsgging, Unsur<aced
roads and skid trails are slippery when wet. l.ar~ging roads
requre sellable surfacing material fort yertr-round use
f~,~r.rndacf p~trbles and r:obbkes fcr read constru~ipn ale
readily av$iloble on ibis unit, Distur€yan~e aF the protective
layrer aF sluff earl be minirnizecf by the careful use of wheeled
acrd tracked eGufpmsnt.
5eadting establ~shinenk 2nd 5r3edling rnortali'y are one
main concerns In the production cf timber, f~eforestaticn can
t5e accomplished by planting C}artglas-fir seedlings. If the
stand inclus;es seed la'ees_ natural reforestation by Douglss-
Fir: C7regon whin oak, and la~igeps3te pine occurs
periodically in cukGVet dress Oraugtrtiness in the srsrface
layer reduc-es khe seedling sur+riwai rate, 4c~n vpening~ ire
made in the canopy, Invading brushy plants can delay the
estebtlshrnent o1 p3anled ~ou~~las-flr see€611ttgs
Gomrnan f4r~sk urtders#ory plants are cascade
~regaiggrape, salal,we~tern brackenfein, western
swordfern, laidlatt plum, end Scotch-hraom_
Fitly mad unif Is In capability sutru6ass. IVY
it1-Spana'u+ray gr~~+ellyf s.ancly IC~4Tt, 3 t4 is #~er'cant
slopes, Thls +rery deep, somewhat excessively drained snit
is u~3 terraces, I# forrtled in g€acial ~utvaash end vnltanoc
ash- Xhe native ve~etatlon Is rrtalniv grasses, Ferns, and a
fev~ centers. Elevsti^n is 1 UO to 4~'J feet The averas~R
arrnu~l precipitation is 45 ko ~5 inches, the aw~erage anruai
air tdmpereture Is ebnuti 5'k degrees F, and khe average
Trask-free period is 150 tv 2~0 days
Typically, the surface layer is lalacic gre~~elly sanctyr Icam
ai*out is Inches tltlck. The subsaii fa dark yellowish brr~r,vn
Very gravelly sandy foam ahcut 5 inches thick- The
substra#urn to a depth pF {~0 inches or mare is dark yvl.uwish
brawn extremely gravelly Bend:
kncluded an lilts Ur1it ere st7tafl d.r~aS r7T Alderwaad soils an
till plains and ~vt~r[~tl, Indianola, and Nistiually yolks an
terraces. P~Isc Insiuded are small areas of 5panaway sails
kltat have a stony sandy learn ss~rFace layer and small area
nt S~anativay grauelly sandy Iflsrn Thal. have slopes of 4 Ise 3
percent. Ineludecl areas mane up about ~~ percent ~; the total
acreage,
PerrrGeabiilCy is tnoderakeiy ra~fd In kl7e 5uts5all of the
Spanawray soil and very rapid in Iha substraturrr_ A,vailab+.a
wakt~r ryapacity is Icur. ~#fective tooling depth ks ~~ inr:hes
cr more. f2unoff is slow, acid the hazard of water erosion is
sl_gFrt_
This unit is r_rsed mainly as haytand or pasture,. as a
site Ter horses, tie as a source of gra'~el, it is also used as
vdoodlaind,
Trte main limitation af;ec:InQ tt&y and pestUre Is tfte ioav
awallatale mater capacity during ills growlrg season, Rroper
grazJtie~ practices, weed confr~l, and fertilizer are needed to
ensure maximum ~rrality of forage. f~r]tation grazing helps
ko maintain the quality of fsttae, Perl~dlc rnoaving helps try
rnalntaln uni#~rm growth, di:,courages selective grazing, end
GQntrOlg weeds- Animal manure reap be applied periosl;lcell:;r
during the growin{~ sEass)n, Arses tk~at re~~eiue heavy
applications should ba harrowed al least once t3 year, In
summer, Irrigation is needed Far maxirnurrs producttart of
most forage crops. Sprlnk[efi irrfg3lic~n is khe best melhad of
applying water- The amflunt of water applied shoulsi be
sufficient In vrat file rook xcne but 6t7ralt gnaugh to minimize
the leae#ring of plant nutrients.
Tftls unit is suited CG hornesrtes. Thy riaain timitaLion is khe
slope.. Culbanic~ ire nok stable and are suhje~ to slougl~ing,
A plant cover can be eskabllslted and maintained through
proper fertilizing, s$ading, mulching, and slraping of khe
slopes. Pebbles anti c:~bbles should b? removed,
particularly in areas used for E~wna_ In
1
1
InclJdc~i areas make uts about 1~~ gerwent ~€111 total
acreage.
I~~rrneahiiity is rnc~derate?y rapf4 In th°_ Spans go+l.
AwaifaL~le °raater ~paci±y i5 maderatF_ Effecti~de rooting depth
is 2?~ !s 4U inches. Fti se$sonal hJgh water CaWI~ s at ~ depth
at about 1~ to 3 inches frorrr fJowemfirer to April, f~ur7aff is
stow, end the hazard of auatar ~rosian is slight.
Mvsi arias are used as ftieyland end pasture- Trls uni[
I; suited to hay and pasture- The main limitations are t[~e
sensanal hlrh water;~hle and the m+~derate awallahle auat~r
capacihy Frper stocking rotes, pasture rotatl~ai~, anc#
restrict2ti gr3Lli}y du~~fib+~ wet periods help tc keep the
pasture in r~+~od Condition and protect Il7? sail fr€~m eroslfln.
Rcrkaalcn gazing f+vlps Io rnaintairl the qualify of frarage.
f'eri4dio n'iuwl+~y helps ka~ [Heinlein uniform gro+nrt~,
disc.^~urages se€ectiue grr3zing, and cortirols tih1~~dS, lr1 mast
years irrigation Is needed for tneximurn prr~~fuction, Sprinkler
Jrrlgatlon 15 khe tS~JSt method of applying water 7Fre amount of
water dppl:ed ghouid b~ suitiraer+t to wel the root. zone taut
small enough to minlrr7liv the laechit7~ of pfaaik rukrier;ts,
A few areas are ~.ISed es woodland- Qn the t}aSls ra a 1 r}t]-
year Slte cure, the estimated sit8 ind~r for J'Jo~.~g€as-#Ir:s
144. ~r< the basis of a 50•year site ~,rve, It is 114, Tl~e
es:lrr7~t,ed grC~y~11h ratQ of err unmanaged, e~ren-aged stand of
~ouglag-nr is 15t} cubic feet per efts per year at ~g years ei
age.
t hg main Ilmi4atian affecting the ha:vasting~ ~f timber is
the muddiness caused Icy seasonal weknesg_ lase rf
whaled and tracked equipment when ll~e soil is vast results
+n ruts ®rd soil compaction, IJnsurfaced rt~ads ant gk€d
bells are s.aft srkd can be impassable. when wet- Lc~~ging
roads require suitab€e surfaoing materiaA for year-rcaursd use.
bounded pebblos and cobbles for road ronstructlon e.re
readily awallahle on this unit- T#~e seasonal high water table
llartlts the use of equipment ka dry periods. C}istubbanr.e o1' the
prvtectiv4 layer of dull can be rnrnlrnizett by tRe careful use of
wheeled and tracked equiprnrrnt.
5eedlir~g establishment i3 the main cancem In tilts
produc[ton of timber f~eforestatio+~ car! be accornp[ished by
planting Claugleg-fir s$udJ€ns~g. ff the stand in,:ludes seed
trees, natural refaraskatl+~n by red alder occurs perlcdlca.lly ill
tt~to~+eP arena, The saas~nal high water table ir~hiteits root
respirati~an and thus results in sort1~ see~iing mor?alidy.
V'~Itien +ape~tikngs a,cg made in the canopy, invading brushy
plants can prey®nt the establishment of planed Uougla5-tlr
seedlingse
Common fr~rggt rrnderstary plants are cascade
C]regongrape, safal, vine maple, western brar•,kersfem, end
flreon white ~ak_
TY+fs n°i3p unit is in ~apabila[y sui~o`sass II Iwo,
710-Spartaway gravelly sandy loam. 4 to ~ percent
slopes. Tftis +rery deep- 3om~what exGessiv~ly drain~~3 sail
is ors ke:race5. It formed in gla::ial outwash ~nrl volcanic
ash. The natiue uecfekacon is mainly clrasses_ terns, end a
few ccnifers_ Elevation sg 1 [}4 to 40G feet. The average
atnnuaJ praolpilation Is 45 to ~~ inches. the average annual
air terrperatura is about ~1 degrees r, and the average
frost-free penod Is ~~Cl tc BOA days,
Fyplcally, Che surFa layer l~ black gravelly sandy barn
ah~art 15 ii~ohes kJ~lck. Tl~e subsoil is dark. yeflpwigh bravm
very gravelly I~am about 5 inches thick, ~h9 subgtraturn to a
depth of ~0 inches ur more Js dark yelicwlah brawn
axtramQly grace;ly sand.
tnaludetl in this unit are small areas of AFderwood soils an
till plains; Everett, Indianola, and Nlsqualty sons on o~aiv~as~h
terraces, arrd Spann goals in dcpr~gsiong- Alga irtclud~d are
small areas r}f Spanavrey soils that have a stony sandy loam
su~ace layer and small areas of ~panaway gravelly sandy
1^am than havs~ slopes a(~ kc 1 ~ percenk, Included areas
make tip abaul 2t7 percent of the total awnaags.
f'errneabitlty Is ~~toderately rapid in the subsoil of the
Span3way sc'tl and very rapid "sn the srtGstratum. P,vailable
waken capacity is lava. ~ftective routing depth Is ~4 knches or
mere Runaf ig ~ieav, and ttte hazard pi water err~sipn is
salgJtil,
This unit ig used ma€nly as nayland~ pasture, or
cropland, as a site far harnes, ar as a source of gravel- IC is
also used es woodland,
The main limatasian affecting hay and pasture is the IasN
a~raflabla water capatit}. ?roper grazing} pracl3ces, weed
c~sntrol, and fertilizer are needed to eatsura rnaxlrnum
quaGky ei forage, Rextatia~i graasrr~ frelpg ;o rrainkain the
quality a! €orage faLriodic m~awing helps to maintain ~~nifurrn
grawekiy, dlscouragcs selecti~'e graying, and cantr~ls weeds,
F~nimal manure can ba applied p+~riodically during #ha
gnawing season J~reas that rer.:eiue hea~r~ apptltotions
3hvuld be harrc~+,tiaed aI least once a year, In summer,
fn-igation is headed for maximum prnduotign of must forage
craps, S~prlrlkler Irrlgetlc~n Is the f~e~t method of applying
water. ~'hB amount ai water applied should be sufficient to
4+fet the tool zone out small enough to minimize the leaching
of plank nr+lrients.
T#tis unt 15 sui[ed to stops. Wheat, ~&ts; strawberrl~s,
raspberries, blarfktkerrieg, and Sweet ~~rn era cr,mmonly
groa+~n. The main tlmJtatian is the Jew available wa;ar
ua~,asi[y, In surnrner. frrir~atiari is needed far rrra~:imurH
procluciaon of mast caps.
1
A ~iv~s'tort o~ The ~ra~tl~y ~~'~~p, Ins.
PO Box 122b7 - O~y~mpia INA '~8~{]8 - ~6C1-357-7883
~3r~d~e-~+lat~l~e ev~~chni~al ~e~vices
,4 ~ivisi~+n cif 1"h~ Bradley Gr~rup, Inc,
P~ Fix 3~2~7, ~I+/r~}~~~ lNA 9$~OB-~~67
Rhar~~ ~6~-35 J'-?$$3 F=A}{ 36~-8~1-93u7
501L If~E~TIGTII~! I~EPFkT
E~}R TF~E ~~I~TS~I~I~ h~IMER~C~AL ~1E11~L~Of'~{VT
~Ef~RI' `~4LLEY R~~ ANC TA~H~7 BLILEARD
This. r~po~`t presents the results of oar subsur'faee inve~~igat~:on fc~r she proposed
1'arijlc~e Det~tseher Y~Im Daycare development of three Commercial build7r~g to be
constructed an a triar~gvlar Iot of abo~ ,~.~,~ acres a~ the ~n~-theast ~ar,~er of 7ahorrEa
Boulevard ar~d Berry Malley Road. in the City rf 1f'elm# V~l~shington, fur ~urpc~ses ire
explorirrg the subsurface soil conditions -~rere to evakuat~ ~ 5it~ ~+~ils far infiltr-atiar~ of
storm vrate~° f~vm tM~ devekoPment, co evaluate the bearing capacity of the size sails. to
present r~c~mmendations fof sate prep~r2~tian, to present recammertdati~ns fc~r
foundation desigry, and to address other geote~el~nical ~vnsaderatior<s far' ~e prvjent.
- ~r~or~ rho ~r~farrnation ~rc~vided to~ us, a understand tE~~t the first phase of [he project
will be the construction of a l 4,400 square #ooz daycare #acilEty in the eastern area oi`
the Iot T+nro additional commercial bui~~dir~gs are Prapa~e~d i:n the r~ort#~west corner of
the property and frar~ting onto Taho€na l3oulevafci. These ~r~slldings walk have a faotprin
of B,OOQ~ square feet, each will ~e the second pE~ase ref site t3e~relc~pment~ lr~cluded in the
'~ project is Hero asphaltic concrete pavement, on-site storm water infiltration facilities,
and new landscape areas. V'Ve expect. that the e~keri€~r vwails wilt lie supported by
continuous perimeter footings. lnteriar v~ralls will be supported by strip footings.
Colurnri lands wik~ be supported !~ isolated footings. The ~a~or system for the buikdir~gs
will be either` eor~crete slake ors-grade or ~opst support ~oo~°s with a craw! space. 'csrlc
was ~~thorixed on bek~alf of d7e project derreloper by I`~r. J. Chris ~eel}~, P.E., Project
- E.ng3r~eer of MC S~uaretf incorporated, the projects cavil ,design consultant
SITE +CC~kVl~kTI~~JS
surface +t;: onditior~s
The prc~~ect site is of ka relief and nearly level. 1~'9a~~r vegetation of ~e site is f7ouglas
- firs., l.n rowing -re~etatior~ is Scotch broom, }-iirrralayan I~lackherri~s and Oregon
r`ae along with low growing grasses in open areas.
i~~~} 170
Page I of ~
r
~8~9I7~1
Rage ~ of 7
Subsurface onditir~ns
Subsur{ace conditions were explored by five test pkts excavated ~rrith ~ rubber-tracked
excavator c~e~ t2 Hu~ust ~~+08. ill test pits rver~e laosely tra~kfilled prier tc~ out' I~saving
tl~e site. D~rinig site devekoprne~nt worts, these cast pits €nust t reexca~eated anal
back€i11ed as controlled fill. This is ~to prevent "soft" areas bekr~g under pavement,
footings, and slabs on-grad+a hici~ would affect the perf~rrrtanc~ oi` the structures.
The project sites Is located can the ashon reeessional outw+ash plain. ~t th"ts site, two
sadl units are found. Tl~e surface soil unit Is assoeiated with tf~e Soil anservation
Ser+~lces ~SC~ $par~avaay series of soils. These are dark brawn gravelly silty sands with
finely disseminated organic rria~terial artd varying v+ol~ume of roots. t the project site,
these soils are thin, less than tvva {yet in k'hicCe~ess including the organic topsnia layer.
~r~derly3ng the Spanaway soils are the coarse sands anti gavels cif the ashcsn
redsi~onal c-utash, t thin site, these are poorly sorted mi~ctures of coarse sa~tds arad
gra~rels witF~ cobbles ar~d boulders with few fines. These sails were i~u~rlally deposited
recesskanal and progla~ial stratified pebble, cobble, an~i boulder gravel deposits [R
meltv~ater sta•eams and deltas s~urirrg the retreat cif the ~sfron lobe of the ~C+~rdil~eran
glacier northward during the Fraser glaciation in late V~lisconsinan time. In the eo~ogac
lad of the ~er~tru~#e :~adrang~e, Y~shingtorr oom~iled b}r Henry's. S~b~.sse, ~p~e~ Fide
Deport 8J-I l arc! published by the Washington division of eoCogy and Earth
t~esources, C987, the pro~ert site is mapped as dog, ashon ournrash grar+el.
Thy depth of excavatiorro of the test pits owes limited by the rapid sloughing of the test pit
'~ walls. Test pits were terminated when ~e volufne of material sloughing into the test pit
e~c~eeded the rate that the excavatpr could remtxv~ r~,aterial,
o ground a#.er or seepage Jere#oQed in the test flits. e da riot e~€pect that high
s~sona~l ground wader lerre~s would have ar~y ad+ree af€e ors xhe sire de~reloprnent
work. lni~ltrati+on caf storm wader will be sapid Into tine c,uarse sands and graveks.
D~S~l~fC~T~! 3I] RE~~i*'1FNDATfh15
Site Pre~aratit~n
'~Ve e~cp~ct that minirna~ site grading and fling will be rewired t~ de+reCop thks pro~~ct.
You shouCd expect a ,~ener~.1 reduction in surface ~leuation of about one foot by the
sa•`appir and grub~kr~g operation. The Spanaay soil series does contai~t fines along witdi
fine organic rnaxerial and roots. Ef site development vvc~rk is conducted during the rainy
season, a recornmen~l that this soil eanit tie stripped to expose the non-rrkoisture
r
~8~91741
Fage 3 of 7
sensitive coarse sands and gavels. Tl7e e~ccavated pan~a series if screened tc~
remove oversize material would be su~tahle for use as t+~psoii far the landstap~ leas of
the project. The ~~ana+rra~r series- is prone to sheet erosion when exposed to rain.
Erasion control measures will ae required tv confine sllx {aden water ger~eraxed From
this soil unit orr site.
The underlying coarse sands and gravels vtirith cobbles and bauld+~rs offers goad
infiltration potential far st~rrn water infiltration. This soil unit also offers hl,~lt allowable
bearing valves for standard spread f+~atings. 1~+Je also expect that this sail unit. will act as
a natural capl'llary break material under slabs. Goad support far flexible pavern~nt
sedans is also provided ~~+ this svkl unit. Ve expect t~rat the gradation of this ma~trial
would meet the gr2~vel base requirement of the 1SQ4TIAP~A Standard pecificatic~ns
for pavement sections. Tl~ls material is also suitable for use as an-:size structural fiill and
trench ba[I'iJl~ Re~mavaJ al` aversizecl material, rnat,eri2] greater ~~n ~-inch ie diameter,
will be required during the paavement of this sail as str~ctUra~ fill ar ~-er~cr'~ backfill
material.
,III e~ccavation and trencE9ing is to canforr~ x[~ rye C3eps~-tment of L;abat` and Indus~tr-ies
Chapter 29fi- 15S 1~VA~, ~ortstruction 1+1~ork, part , Excavation, Trenching and
Shoring_ e recomrmend a soil type ~ be used fcsr cantrolq The truxash sands and
gravels are eohes'ranfess and will fail by sloughing rapidly frorr~ vertical fakes. Slopes
must be constructed or shored as specified ire xhe regulaxians.
e do nc~t expect chat ground wateM", even during heavy r'~in events, w111 have any
ativerse effect on site c~r~C. V~f~ t!o nc~t expect that tre~,ching ar other deep excav~tf[~n
will eneountar ground v~rater.
l<aundatl+~ns
Foundations founded can the ouovash soils after being pr+~of-rol>!ed or foundati~r~s
founded an structural fl?I con5tr[~cfed using these sails and placed in canfarrr~ance with
the recommendati~sns of this repay ofFer 'high bearing c~p~city_ Fcrr cE~is prc~je~ e
recornrr~end a design hearing value of 3Q~fl ~.s.f. ~ one-third increase in t~1iS Value is
permissible f'ar shc~rz-term wind ar seisrnxc loading.
~x~terior fnc~tings should be founded a minimum of 1.5 feet t~elovv planned finish grade
for frtast protection anti c~r~finement_ a recamrner~d that eontinua+~s and strip
#ootings have a minlmur~ widt4~ of 16 Inches.. isolated f+a~tl€~gs supporting column Dads
should have a minimum dirnensian aF 3.t1 by 3.~ feet s~a~ared.
Serrlamer,t of s~€ructtares designed to tk~e recc~mrnencfed beas-ing value and placed on soil
prepared according to the recommendations of this report sh,~t~ld not be siignifcant"
f}809 17~ C
Rage ~ of 7
generally, a eacpect combined toxaa and differential setd~ments cif one inei, or less will
~accur. This settl2rnent gill occur rapidly as loads are imposed. ~oorl compaon
control during ~lacerr~ent of struur2~l 1311 and during Che ~roaf roilEng tc~ der~sify the site
soils is required to ensure than this estimate is not eacceeded.
Lateral Soil pressure
Vie understand that no retaining rvalEs car Foundation walls ire eacc~ess of four feet in
#~eight and restraining saiC are Included In the design solutlvn fcar this pra~ect. ll' walls
rrMeeting this criterion are includes, a should be consulted for a~ppropr~ate soil, design
vaJu~.
Lateral loads may be resisted eit]-~er !~y passi~-e soil pressure or by friction between
footings and natjve soils. Lateral loads fr~r Foratings found in tFte cautrv~s'h sands 2nd
gavels and backfilled tt~ ~e mintrr~um specified density c+f this. report, ~ passive soil
pressure of 3~O~Q p.c.f. rna.y be used. f~ coeffCcfent of Friction ~# Q.5 is per-Fnissible
between footings ar~d r~ut+aash sesils.
Ivor Slabs
'~+Ye effect that ~loar sCa#as will be supported Cry eit~ier proof-rolled outash soils car by
structural fill sections constructed using the ~n-~i: auEiwash soils. TFre ouch sands
an+~ gravels will act as ~ natural ~pillary break material due to the 1'aclt of fines. In that
these soiCs arecoarse, a have no abjection to the placement and compaction of a lift
of 5J8-inch minus crushed rock tca facilitate fine grading operations for casting of the
sEab.
Where exterior walkway slams abut [h~ structures, the four~~daciv~r hackfiil rrtiust be
. ctarnpaeted to the minimum specified density of this report. W~ also rec~mrnertd that e
thin lift of compacted X18-inch crushed tocic ~~ placed b~:twe+en the autwash sails and
.~ rvallcay slabs to faciGt~ tine grading ~+perations.
'e expect that slabs will be subjected to light commercial type of loading. The
concrete slabs should be de~ineti to the current edirior~ of tl~e ~tein~rrring Steed institute°s
Deslg~r ara~+m~ l`or e ~expect~d fla~ar Ivads.
paving Sectian
We expect that the paving section itl be placed on the densified outvrask~ sobs. We
alsc+ expect xhat this material will meet the requirements of ~ravei 8a~e. used ors soil
classificacior~, a recommend a design ~~[~ rral~ue of 3Q. Use of this value re~urre that
t#~e subrade be compacted to ~ uniform mnarrtum density of 959E of 1ST D b$. ~n
i~
08~9I7~,
~~~
the densified autwash st~ils, we recommend t'he paacemer~t of two inches of ~~~-inch
rnifl~5 crushed ~c~clc fc?r the leveling course and two caflnpac~ed ia~ches oi: Mass B
as{~#~altic concrete pavemer~~.
All material used for the pacing secxic~n rnu~ canforrn the requirements cal tote „
current edixi~n cr# the 1+~15C~T~P'~~I Standard Specifl~~xiicans for Roa€f and Bridge
~onst~-uction. The project's civil e~rgi~eer sl~aui'd review ~e recomrnende[I rrtinJmum
paving section to 2nse~re t#aat tfle section meets the mini~mu,,, design requrernent~ based
ran she project's expecre~d Traffic loads.
The site earthwork contractor must ensure cornpactian of trenches crossing the travel
ar~d parltlr~g areas to pt`eve~t fuxur~ settlement ar pavement fallurg. lsa, axtenxion to
eo~npaetit}n around rt~anholes and ca~ch basins is required to prerrent settlement of
pav~rnent and pavement failure around these stru+c[~res. IJse of select, irrkporxed
structut-al fill material far backfill arrrun~d these str~c~res ar+d #~r trench baeicfill is
*ecvme~ended to fac~llxace ~ompacti;re effort, Use of screened ~on site a€~tvvash ma~kerial
would be an acceptable alternative.
Seisrrtie Siee. Periad
The project area is In a ~c~ne o~F high spe~traN response acceleration. .Figure I ~ I ~.5~~~ iin
tC~e 2~Q~b rntcrnoti~nai i3ufic~xt~g C~cfe ~l$~) has a site response of Q.~g of ! .0-second
spectral response for a Site Mass ~. Table I bE3.5.2 Site Mass C}efinitln~as would place
thfis site into ~ sail slte class ~ used on site ge~s~ogy, The site is underlain to a depth of
more than i ~~ feet with dense granular material with hl~values greater than 5~~.
e4ctuaN grau~rel m~ation during a seismic event is influenced ~y the disxanee from the
focus, tl3e tNepth to (~edrock under the site, and conditions (degree of cor~so~itilation and
saturaxitrn~ of the 5qi{s supporting the strr~cture. Ye do not believe that tNtie underiying
soils are prone to sponcar~ous li~uefaceivn under ~easrrric leading.
Infiltration Potential
The ontash sails found under the Spanaay tapsoit unit are cdars~ g~nular materials.
These sods are considered to be free dra>nlrig as the site c~utv~rasln soils are permeable
and porous as they a~`e coarse grained and lack fines. Ewen ~+~rith the localized reduction
in porasity due co k~ig9~ volumes of cobbles and baulders, the infiltratian rate into these
soils is in excess of ~[I inches per h~rur.
1
4}i3~9 ~ 7~ I
Page ~ of 7
~arthorl~ ~riter~ia
Ire areas under structure, paving sections, and sadewrall~cs, strip a!~ topsoil and organic
material. I-c~r struttu~-a,~ fill in areas under fac~tings and slab can-grade, Moe recommend
that all soils he compacted zo a minimum d~rrsit of 9S percent of ~AT'M ~-~ ~5?. All
coifs exposed in the bottom of the excavation will be proof-rolled tc~ a firm and non-
}~ielding surface before placing fill. Materials under tl~e paving section should also be
eompacted tc~ the minimum densir speci#ied ire the paving section of tl7.is report by
proof rolling be#ore placing the paving section. This Jncludes proof ra~lling in-~la~ce souls,
soils t4~at have been disturbed during constr~€ctic~n, and all strucrural #ill rrra~terials.
reeomrrrend that a clean six-inch minus well- railed
~c~r ~rnported structural fill, e g
gavel r~r gravelly sand classifying as ~1 or 1hf as determined b}+ AI~lSl~A5Th1 test
method ~-X487}, eanforrning CO }~,1~'~1~1A specification ~-~3. I ~ far gravel borrow, be
used. 1~ also recomrr~end t}vat nca rnr~re than 7 percenz~ by vrreight pass the r~umher
~Q~O sereen as tested by AI~51~,4~T1`*I f?- I I4Q test procedure.
~~I fill should be placed in ur~fl`orm k~€~ri~ontal lifts of six- to eight-inch Loose thickness.
path lift should hrs contlitiorred to tl~e optimum nrroistzar~ cor~~kent and ccsmp~cted tta the
specified minimum dar~5ity hef~re placing the r~e~ct lift. ~h+'e furtkter recommend that all
utillLy p~ench bacltf'ill be carrrpacted as speciFi~tl ab[~ve, Ear-tilVVt~r shnultl Ike p~rforrr~ed
under the continuous supervision and testing of an approred testing agency to ensure
~omplianee with ~e campactiafl requirements.
'Placem~nc +~f fil section an slopes greater tE~an S:1 ~horezontal to v~rticai} will be
benched as directed into the t]~tive sails. Height and width of the bench will be
determined in ~e feefd b the soils en~in~er or ~ngirrrir}g geologist.
Unrestricted slo es chalk not e~cceed it horizancal to vertical for fill emE~anlcrnenrs
p ~ )
and €t~ts that expose native sails. AEI fill slopes rviil lae rolled. T}~e project"s ~civii
engineer a~ res,ponsihle i:r~r the protection a# the instructed fill .slopes from uncallecved
runoff. Ode recommend that all rut~artd-fill slopes be seeded as sac~n as possible after
ec~nstructit,n, sc, thac vegetation can protect the slopes from sheet washing.
~Vo fill is to be laced Burin erlods ca# e3nfavorable weather ar while the fill is frozen ar
R ~P
curving. l~fhen wor'Ic is stcpp~d by rain, placement of fill r~vill not resume until the sails
engineer car er~gineerir7g g+~~ofogist deterr~ir~e~ thaC the ~oistur-e ~ntet~t is suEtable for
co¢npattlve efForz and that the pr~aviously placed fill has not been loosened. The
cc~ntra~tor will tal~ce appropriate measures during unfavorable weather to protect ~e fill
already placed. Measures that may be required include IFmiting wheeled traffic and
grading to provide tefnporary drainage of the fill. t tFro direction of the soils engineer
f~
u
~809I1QI
Page 7 of
or engineering geologist, the ~or~xr'~~tor will Eye re~p+~nsibfe fir the rerr~c~val and
rev^re~rlcing ~f flll ~aat laas sa~ftenec~ car has less tha~r the required e~mac~ion.
Limits of Liability
B~AIr}LE`f-~~L~E E~~~CHI~AL EF~b'IES l~ responsible for the o~is~i~ns and
cor~clusic~~ns conta~r~ed In this report These are based an the data relating only to tl~e
spe~clfc project and locaQOr~s discussed herein.
This report +was prepared v,~itli tf~e standard and a~c~pted pr~ctfees of cur industry. In
the. event ~onclusirans grad recomrraendatons #~ased on these data are made ~y others
such conclusions and recoma~~r~tlatlons are not the respansrl~ility oi'' the sails engineet-
c~r engineeri~rg geologist unless he has ~e~n liven an ~pportun~y to r~evievv hem end
c+nncurs in such conclusions or recorrarner~~atic~ns i~ writing.
the anal~rsis and rec~mrner~daz~ons submitted in tJ,~s re~rort are Lased upon the data
~obr~in~f in the expla~rations at the locatio~rs indicated ern the attached pCan. This repart
does not reftect and rarl~tians that may oceur between t~-iese epl:c~ratic~ns. Tl~o nature
and- tent of variations between explaratians rn~r not become evident until
carrsrruction is underway.
~radle}~-hJoble is too ~ given the ngpor~unt to review the fins! plays anal spec~ficat~o~s
for soils worl~. This is to verify than e,ur geotechnical recomrnendatir~ns ha~re been
correctly interpreted and implemented in the final design ar~d specificatic~~,s.
BR~LE1f-fV~BLE GE~3TE+CF~iVIAL ~ERI~]~E
Report prepared by;
~~ ~ ~ ~~ 2 t ~ ~~
..+~ ~~~y
- ~}.~ • ti5
David trong, I._.E_i3. '~~ ~
~~-
25 5ep~emher ~Q4$ ~ ~~,~~~:;.:~,
~' rs
t7~4tiffrJ ~. SCR
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`irET PIT LADS
Test pits excavated, lagged, ar}d backfilled an I ~ a~~ug~t ~F7~8
Test >~iz C]r~e;.
(~ to -~. feet ~ariC brown silty gravellyy sand with a large vv~ume of roots,
partaa~ Topsoi#.
-~.3 tcs -7.~ feet Yellow-brawn ~c~ar~se sand gavel v~rlth few lines and cobbles.
Test Pit Tc~:
0 ro - f .8 feet Uaric brawn silty gravely sand with ~ ~arg~ volume of roots,
pan~ay Topsail.
-1.8 to -~.~ feet 'Yellow-brown ~~arse sandy gravers v,rit~ ~obbfies and acca~FOnal
boulders.
Test Fit Three:
~} to -1,3 feet C9arfc brr~-,~r~ grapy silty sand with a large volume of raves,
5panaway To~ssoil.
-1,3 to ~.~b feet 1~e~la-brov~rn coarse sandy gravels wltC~ cobbles and o~casiranal
ho~rlciers,
~"est felt Faur:
0 to -I.~ Feet E]ark brawn gravelly silty sand with a large v~l~rrxe of roots,
Spanavuay Topsail.
- l.~ to -8.3 feet 'ells-I~rvn coarse sandy gavel with cobbles.
Test Pit Five:
to -1.8 feet I~arlc brown gravelly silty sand with cats, ~par~av~'ay Topsoil.
- I ,8 to -6.5 feet Yerlo~v-brawn ca~rse sandy gravels wish ~vE~bles.
No grourtid uvater ar~ Inck~c~t~ar5 of seasonal high grand water levels were ~aE~served in
the tort pits. Test pit depth was IEmited by the rapid s~ougi~Er~g of tha t~-er~ch walls as the
test pits were b~ir~g ~ravated.
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the chair.
Th+e Aqua-Swir9Tmr with ~ ~~nveyan~e flow diversion system, provides full
treatment tar the most con~rnin~ted "Fiat #~ush", +~rhlie hie leaner peak sto~n
Aow is diverted ar~d channeled th~augh the main ~anveyance ~Epe. Many
ragula~ory agenaes a~ in lire pra~cess of eskablis#~ln~ "'w~t~r duality kreas:ment
Now rate" for specific areas based on 6i~e inii?al r€~i~r~bon of pallu~an ir~ly the
storm drainage sysk.
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Tie I~eatment operation beg~r<.~
UVh~f1 storrrNV~rater eaters t~l
Aqua-twirl"" througk~ ~ ~" -.~
tangential Inlet pk~e khat
oduce~ a ~irc+~lar (or ~+t~rkex~ _
how pattern that causes ~ ~~ ~°~
eantaminat~es to se~le to d~~
tias~ of the unit. Skr~c~ =
yy~ f ~ 4
storm~k~r ijaw is intermittent F#
r .T L
ray r~atufe, the Aqua-~virl`°"`
ret~iri5 v,~atet' bekn storm ~~~~_ :.
ever~t~ ~rovldir~g both "dyr~arnic ~'~+- - t`~~.; r '~~
and quies[2t~k" set~~ng of ~oiir~s. ~;;' - - ;,~.~,'~ _ .
the dynamic 5e~ilnt~ caccurs .,~ -, ~ _ • f
* ~ -. ,
t~l~~ifl~ e~Gh SGO+~ event while Floata~~e ;te#r~s n tic x~u~-9wu1'"
the quiescent settlCng tal~e~ gkace
t~eteen successive storms. A contibinat3~n of gr`avltational ar~d hydrodynamic
drag forces encourages tfie ~alids to drop out of kY~e flow ar~d migrate to tl~e
cenr of tie chamber w~er~ ~e~r~dkies are the I~west, a~ shown Pram exter~s~+e
~~D rrtiod~ling. 5'ee "?eo~rmarrc~ acrd ~es#rx~"frr more
c~~ils.
karge percentage o~ settlea~Ce
s~allds In stormat2r are
repartet! to k~e small and
h~rre 1ov~r sattllrtg
~+elor_ities. ---
Therefore,
tl~e volurr~e
of wa~ar ~~~~
rived In
kll~ Aqua-S~ulrirM
prOV#d~5 t~?{', yUfe5C~~1t settling
that kncreases perforrrta~ce.
i^urthermore, due tia Firer
sedirne~nl< adhering onto larger
~xar#ides ( than ~~~
mi[:rOr~~, khe larger particles
settle, rather than staying
su~pe~n~~Cl In the water.
Inlet
1`he treated r~~w kY~en ~scit~ khe A+aua~~iri~~, behlr~d kl~!~ arr~ted outer baFile. "fire
tai of tine baFfle is saaied acrn~s tae treatmenk channel, thereby ~Ilmlr~a~ng
floatable peliub;-4ts ~^r~ r;{:aping kl~e system. A gent pipe is eactenriatl ~p khe
riser k~ ~~}0~~ kkt~ backside ot= the i~aft7e ~~ atmp~edt: ~ondi~ansf preventing ~
iphvn from Frafit-eing ak ~e b~~t011~1 of the bade,
As re~omrnended by khe Center For ~Natershed Preter~on aad seve~-a1
rru.~~ricipalitiesr khe Aqua-SwiriTh' ran also operate in an ~V~lin~ cvnFiguratian
provi~lir~g full krafirrrenk of khe "hrsk flush." I-iowe+~er, this arierRkation requires kt~e
ir~s#~ilat~on a# additional manhole structures. to dE~+erge kho ~ovu to the Aqua-
irls" Far treatment ~r~d carG~+eyan~€~ b~ kt~ khe existing main r~veyartce
;form drainage s-~Stern.
y
custom pplia~>w~n
-~
,~: ,.~
.~ ~y.j
5
Qroducts to adapt to a variety of appliCaklons.
ll~e Aqua-Swirl F"' System carp
be modified ko Fit ~ vani=ty of
pur~os~s ire ki~e held, and khe
angles Fear inlet an~i ~utlek lines
~a+~ be modified ko fit mask
eppJicalSOns. The photo an the
ieft +~emonstrates kl~e Flexibility
nF Aqua-Swirir"' installakiar~s,
'8i `fo Ar{Ua-Swir!"" units were
placid side #~y side in order to
treat. a high volume of water
~t~lle otcupyrng a small am~ur~t
of space,. This ~o~figuration is
~n example of Cho manor uvays
A~~,aShleldT"` C3fk +~se our
trofit Il~ti[3r>~s
The Aqua~~~rirl~' system i5 rlesigr7ed so yak it ~ar~ easily b+e used For r~trpfit
applicadon~, 1Mth the invert of tl~e inlet artd o~rklet pipe at khe same eievad~r~,
the Aqua-~~rjrlr'" can easily be connected t~ire[tly to tie existing skorrn
tonveyarkce tlrainage sy5kem. FUrthermare, because of khe lightweight nature
and small Fo~kprjnt of ttre Aqua-~irlT"', existing in~str~cture Utilities ~i.e,r
wires, pales Creel) would he unai"Fected by installation,
Cu5t4rn ~esi+aned A~4 TwFn, Aqua-Swirl"'
i~
1
i~
Lt~~~~l~i~i~~
1°k~+~ Aqua-Sirlg`" sy5~em is desi~necl and fat~ricake~d as a rr~odular unit with no
moving ~~ ~~ t~~t nor assemi~ly is requlre[I ors site. 'This f~cifit~tes are easy
inskalleGor~ of ~e system.
~6n all ~q~aahkeldT"' ~ysterns are f~~ricated frnm
high perForrr~~nce rnakerials, khe ~4qua-Swiri="' Is
3rgfnteight~ ar~d can inst~l4ecl +~ikhouk ire use of
heav]r liRirrg equipment. Uf~ng suppc~r~s or cables
are ~rr~^ridec~ t+~ aGlov~ easy ~affl~atJlnq ar~d
instel~kion wtith a tr-aclc compared ke concrete
syskems, using art Agin-+r~ir~'"' carp si~nrr=icar~kly
In addikior~, manuf~~kur~d stub-opts far khe inlet
anal cutlet are pruvi~dee9. This allr~s ttre cantra~tcr
t~ sim~iy akta~ the ~kqua-Sir's'"' direc-ki~r ko the
main c~n~+eyant~ sCOrrn pipe ~v3th rubber coupfiings,
Typlc~lly, an AquaSl~i~eld'~"' reprpsenk~tive is pr~enk
on~tte ion a55i~t in khe inskailatJon process.
~uoyar~cy
„~ .
i
III A~~ua~S~virl~"' S'~rr15 are supp~lir~d with an octagonal ba52 piste t#~at extends
a minimum of fi ir~~hes b~eyor~d the outside diameter o~ khe swirl charr~i~r, The
~ur~c~vrti of khe e~t#en~i~r~ o~n this base pl~ie is k~ provide ad~itko~al surface area
k+~ counl:er any but~~+ant forca exerts on tine sy~kem, `rhe farces created ors thy.
l~as~e plate by the tinreight of the surrOUndi~lr~ Fill material offsets the huoy~nt force
generated within the system, Ii' need concrete can be poured drreci;iy ofttt~ khe
base plate to prn+nde addib~anal resisrlve force. Thy A~quaShieldr"' engineering
~taFf can provide LuryancY oalculaticar~~ for your ~'st~-;~peclflc C~fi~itld3r1s5.
1
t
i~
r
her« instakled in traffic arias, tf+e system ~wifl
be d~sir~r~ed to withstand F•k-?~ kaadng. In
~rr~er t~ ac~an'iplisl~ ~ksd a reknFa~rced crrcr~t~
pad shadk ~~ pa~r~e~ in ~#ace aba~+e the
system .
.S !a`ra "{rxs~atiadra~ a~~ +rl~:arr" secG+~rr~
tpr ~arnple c~r~~rete pad des and f~+rt~rer
+L~~15 c7n basted}a~a~+x
}
~I'1 ~~~ fl[~ ~~~1L~I"I~J3~.
1
t
a
t
traffic Landing
4. ~~~
ir.- e
5 -
5edra~nt ln~pa~ctlan
u~~g a stadia rud
~nspe~tican ar~+~ clearr~acit ~f the Aqua-uuirl;"' is slmpV~, The
clamber can ~~ insp~~ted aril mairitaini cv~npletely
from the sur~ac~. Frei-~~atina ail and fkGakab~? ~IPksn~ can
be directly ohserveci ar~d rernov~cl t~ira~gh the provided
sertirice access.
~JeaiYa~t cif acc,~~r~tialatetl soklds is needed ti~t~era tle u~abke
storage +~nl~i~me las been occupied, The de~t~a crf solids
czi~ easiky be cic~teririined using a stadia rid ar tap€~
rneasure khe to{~ of khe solids pkle grid cakcukate tree
dis~nce to thr~ w~,t~~3 surFace,
A vacuum tr~ac~ can be used to re~o+~e tha ac~cumulatec#
sediment and debris. f1i~k ~f lie materkal is +cakl~y
treated In the same manner as c~tci~ basin ckeana~rts.
~0.quahi+~kdr"' recnrnmen[Js That aki rrxateriaks rerrio~ed be
handled and dFSpas~d cif kn a~e.~rr~anc+e with. f+~a~ and skate
requkrerrier~ts.
~vr ftrrr cl~~dr7s rnsp+ec~ianr ar~~ ~'l~~rt~u!`,~'~r~5,
~le~ = ~e ~ "A9airrt~r~arrc'' ~ e~ticar~.
r~
Crete pad protests it+~ ~{ILia-Swlr'I'"
fe+~rn i~npa~# igaging
VE9tha1lm tFLI[~ ~ieaMS CFA
Ai7ua-Swiri'"
qua~~ii:~ ws~rkshe~ are prc~rr7c~~d ~s an exa~`npre of d`a~ inFormad~n khak
At~u~S#~~~ldr~ wiMl ne~ci t+a ~u~k~rrM~z2 an ~4q~ea~v~rirl'°" k~ a ~ei~ic wark sits.
1 corr~~fet ~ ample
• ? blank rkeet~
7
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~~ `` . j'~ AlquaSi~ieldn".
L.# ~ ~ ~ Lr I ~ '{ ~7~3 ~{8n~s$ka Drive, Suite ~ ~ Cl~tt~noay~, T~ 373
Phtwr~~: ($88} 344-904+4 + .Fax: ~4~3} ~~{~r-~1~
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±A~~-9 ~.OtD ~~ 4$ ~4.~ ~iD 14~
AS-~~ 1(x.0 ~~} Il.~ 13.~U 1$[3
AS-f~ ~.~,~ ~~ ~5,~ i~a~8 ~7U
- C~~barn _- -- ~~6 -- --
'ItigM~r ,ur~ipr ge~ali~ kankmf~kk flaw ~a~s pan he de~l¢netl eul L!G rnuillr~n Rwfrs.
~} The ,Aura-Suvfrfrt` ~rnveyan~v ~t~w pr,+e,rsion {~F~]) ~r~vides fr~1! ~r~afm~r~x of ~ha
`First ~`~ush. " w~rfe fare peak rlesigri storm rs div~rtad and ctrarrr?e~~d thro~g~t tie mart
ccr~va;rance f~+P~e, P`f~ase reFer to your 1a~ai re~ores~rrr~~w~ for more ~n,Sarrrra~iora_
2} ~ar~y ragu~alory e~~rrciss are vslab+is~rtRg "w~lBr ~~~e~dy ~ra~trner~f f~~w rates" r'or ttrc~r
arias based orr fih~e arl~t{a~ mo~r~rraerlr ~i~al~er~ar~ts trrto Phe starrrr tfrarna~~ 5yst~m, Pete
tr6atrrt~nP how rite ofi the Aqua-Swfirf""" sys~am is ar~cdrrreerecf fo meat or exceed 1F~a
~i7ca~ w~~~r q~+2~tty tr68tmsrrP Cr~f~r~a. ~fi~s "walar quality fr4~tlri~l~t ~F+7w r~#e"
~yq~~:2i1y rd~'rese.nr5 ap~lrvx~rrrat~y 9+~i+o fo ~ °~ o~~he dofs! air~e~aJrt,r.~,`~ o-rarurr7o
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A-~ 75~ ?~~ 30~ 3i 1~0 ~l,~g
A~-3 991 2 ~5 51 41.6 x.57'
A~-4 125 ~#~S X57 ~~ 719 ~"~i
~ .f5~4 305 61I~ 125 i~?.~ ~.~?
AS-5 189 ~5 7~~ i78 176 1.
A5-7 21 #[l ~ Lei X43 ~~]da4 2.55
#15=8 2#38 X57 107 317 26$7 3,2.6
lkr5~g 27$3 50~ 1~1~ ~ 3444 x.11
1~ 3 S5~ 13T2 495 47'7 5,:10
ASwi~ 355 X10 ~~19 713 X27 7.~i5
AS-l Custot~n -- -- ~7~.3 .. __
-rwpe wev_r ~G~~si~r~ =rnq%in v..s ~imr rives ~n ve ab iyuei7 wnn m~cr., il? t. "GIs
~~ The Aquawirlr'" C~xrrvmy~rr~a Ffow ~lvers#on ~~F€J) provides fuH h^eatmer7f ~! tf~e
"frs~t dl~Sh, . wttil~ fh+~ beak design storm r3 ~trer;ed and c~rarrrref dhro~gh ~f7e mare
cor~veyan~~ pr'xse d'~leasa refer rc y~a~r lracad r~,eresentadave tLv rYror~ trat4]rrr~at:or~.
~) ~4iaray regr~la#t~ry ager~r~ss are esfiabllshin~ tivater gtratity dreatmar~d flow rc~dQS" 1~0+' fJ~
err; es l~ssarJ' on tt~e fnttiel rrrovea~ant of ~oltrrtants grata tfre st~rrrr drairtag~ syslerra T
tresdmerrd ~9ow rate Rf the A,gr~a-SGvrr'lx'* SVSd~~rr is engineered dv rr+eet or exceed dhe ~;a
wafer c~~~adtty freadrrrand cr+t+3ri~, ~f~ts "1~--ater quaJ#fy lreafm~rrf fdo~v rats"' tY,ptct
reenfs a~~`axkrrefet{ ~09F, try +J5°I aF the rafa~i anrar~al runr~Ff ~}of+~rrrre.
~~ design ar~d erter~i~han of kks~ Aqua-Filter" eralky ent~its same degree of custar~~akaan, Far
assRStaro~ in design end specife sl~ing using historMq t`al~n~ell ~lat~, please refer ko 2~n Ar~~aSk~ieid~""
FepFE5ECl~b'!~ or Visit nur wBk~Sita ai w~nrgW A~tia;~hieldknC.~aFn, C~f~ d9k~lJs Ord speCIFc3lions are
a~rai~ahle u~an rr3que;~t,
~ ~~~i~~T~ arr~ l tail ~r2~vrrir~ ~
~~m~~~ Aqua~w~~lm, d~~ail ~t~~,gs ire p~avid~d as exam~tes oP ~e type ~~
3y~terns ~i,at Aq+~~~~ieidr"' c3r~ ~}f~~~ Por ~ £pecific work sits,
_ _
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A~~~irl~' e~~fi~a~i~n
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`T`his spe~ilii~ti~n shalt govern I:he ~e~arm,~nc~, materials and fafarication
~f ~~ ~t~rrn~ter °~reatment 'system.
S~{}~E ~lF OEtIi
The ,aqua-~hrlCirfTM' shall be ~eta~+~ieci by Aq~a~hield"'. ir+c., X733 ICanasi
pnv~, at~n~a, Ted {888-344-'~044~, a€~d shaGl adhere ~o drt~ Follc~i~g
rr;aterlak and ~~rForrnance spectFi~~ar~.s at the spe~caFied tf~ign flews artd
skarage ~apecities,
M ~ItERI~465
A. Starmw~~t~ 7reatmer~t ys~t~~, shall be made fF`orn High-~er~siky
I~olye'kl~yi~r~e ~HDPI=} resans meetir,y khe Foil~wir~g regs~irements,
~) HDPE Mate~i~l - T'he F+~PE mak~rial suppiiad under khi~
spe~ifcatiprr 5ha3C b~ high density, hig#~ rrtolecular uuel~]h[ as
suppai~~ b~ rr~anulackufier. The F+~P~ rnat~rial shall t~nforrrk
t~ RAM D3~~D-{~~ with rninlmum ~eEl ~t~ssi~iti~n vale ~F
3~5~.
2} PHY)'.CAL PROPERTIES ~F F#{~P~ ~CON~POUNI~
a} [7~rtsity - e density s#~all be na less fan x.955 gfcm3 as
referenced ire M D l~l?,~.
b~ Belt index -the melt i~tcl~e~c shall h~ n~ g~~eaker than {1.15
~I1D rrrir~,~t~s wf~2r~ t~ste~ Irx accordance +~rki~ ASTM D
1~3$, r~diGo~ 19~~~-16,
c~ ~e Modul~rs - flexurat modulus shall be 11,000 Tess
kF~an 160,000 psi as reFe-renc~d in Ml ~ 790,
d~ Tens~i~e ~treng~ at lfiefd - tenslie strength shall b~ 3,OQ~]
kv I~ss than 3,50 {psi as referenced i~r ASTT~1 D ~~8.
~} S~a,~ Crack Growth Ftstanc~ shall be gfeak~r ti~art 10I1
hours (PENT Testy as reFereflced ter A~STM F 14~'~ ~~
greater khan Sr00~ hours ~~Cf~) as rel`erenced in ~STIf+~
~ 1693 condition C).
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~kl required S~f~tS~' ~r~~aul:iarrs Fur tl~e to~rmal•~r ~rr~atrner3t t~st~rrr
rnsifap~n ire rye re~;~on~lt}II1L~~ oaf ~~~ nLr~r.
B. ~aelcfiFf Regtl~rements
6aclctill rn~ter~al~ shall b~ Class ~ or I7 ;tone r~~ateri~ls ~eN gr~~ked
c~ra+#~Is, ~ra~clRy s~~;~st c~ntaifli~i~ little ~r n~ Finest as ~eFini by
A7M ~ ~3~1, ~ecticrr 5, I~aterials, and compacted try ~~~ proctor
density. Class I rn~tei`ials are pa-eFerrer~. ~ackfll ~rrd k~~cldkng
rnateriel~ shill b~ Free ol= ~ief~ris. Baclcfilll~g sl~akl cunforrrl ko ~,h~
G x.759, Section ~#.?, ti,F]esign ~4~s~~'t~L`kbr~s,°' Backfill stt~ll extend at
least ~.5 feel- b~ycrnct ~e ~ck~e of tk~e ~tannwater Tr°a~rnr System
l•or tie dull I~~i+~Ftk to stab grade ~rtci extend la~ar~lky inta
+arclisrf~ed soils.
~ ~. #'i~e ~Cou~lirgs
Pipe couplings k[r and fram k:he Storm+nrat~t' Tr~atrnent Systern shall
hc~ FornCO`~, ~'~1551~n7"' or an equal l~+~e Ciexihle tact with stainless
Meek ke~~sien l~arrd~. A rr7~i;al steer t~uarci Khali be us~~ t~ prota~t
tR~re flexible l~oc~l`.
[9~ll~S~i~ Olr F~E~S~{~#4Id3IL~T'~
A. Skasm~a~~r fr~~trnent S+~s~~rr~ ~#an~rP~c~~r~r
the rr3an€~Factur~r sd~all fie respansi!~le tsar delfverinc~ the
St;crrr~u~aler T reakrrrerrt System to the sits. Trte syste~-n {ncl~udes the
tre~krrtent c;~a~rnber with ckeklris k~~Fle, 1~71ek ar~d outlet stub-o~ksr
~fFting ~~tpports, 3~]-i~~cR~ fii~ s~:rvice access riser{;} k:o grebe witl~
tern,~t~r~ry co5~t~r(s~, c~nd rt7ar7l~ole frame{s) ar~d cv~er~~),
~. ~~ixtractnr
Tdie contractor chalk b~ G'~sponsil~:e ror prep~rin~ ts~e sllee R=c~r the
~yst~m ir+stall~i~~n lncl+adingr birt Trot limi~etl i:o, ternporar~r si~ori~~,
~C~~+dklon, ctiatbng ar~d A emvvin~ {~ip~e, new pipe, ber.~rJing, ert~
~cop~cti+~r7. jhe contractor sha;l he responsible ~cr P~rrr3ishir~g the
m~~ns to li#t tfie system c~rrrponer~ts oFF the del`s5~rery trucks. T~~
~~rMtr~r=tor shall k~e respa~si~le Fir provi~inq any carr~r~te ~ri~,
Flo~tatlor~/anti~reep restrain, ~t~Chors, c~li~rsr eke. v~1Mk17 er-y
~tra~s or corrna~ctior~ devices r~r~ulfed. T"r~e cortikractor shall ~e
respor~sib[e f€~r l:<eiAd tui;tin~, it necessary, ~n~ HDPE s~rv~~e acees5
risers to ~r~de. l"h~ corMkracior shall b~ re~por~skk~le for sealkrrg the
pipe conr~ectlons l:c kkre Stcrrmvtirater Treatrrrei~t System, R~~cl<flllirrg
and Furnisl7inc~ a91 k~b~.+~r, tools, and rrrLteri~ls ~~e~~led.
I
1
~~1~'~#~a.,.~
~`he ~.ontr~~t~r shall Ise pru~lded ikh cl~rn~nslt~n~l c~r~x~irtgs~ and whey
s~~citi~d, u~€~GZ~ kl;~ese dra~nrir;~s as t~~ ~}~~i5 for ~rreparati~~7 ~~ sha~~
'ra4~ri~~w~ s~n~' ~~t~r~3 r'tr• earrstr-rr~ ~~~ re~ra~`or~xr~. ~}~s,~ ~lr~;~~!i~gs
shall ~e ar<r~a~aterl to in~Ii~tti all rr~a~tarials t~ i~~ LIS~Ci a~ek all a~plica€~le
standards for rila~~ril5, required tuts aF ~later'lafs, and d~si~ra
~ssu~n~t~ons for ~tsuct~ra3 ~r,al,,~sis. 5h~~ dr~~~r€r~gs shall lie p~'epred at a
scaf~ ~} r~c~t less t~rarr ;'~ ir~~r~ per fort. Three ~~) hard c~~le~ of said sl7o~
~i~~~+~r~gs shail b~ staf~mitted t~ the s~~~CFysng er~gfneer fir r~:viie~~v ar~d
atp~rov~i,
~. ~at~ri~ls
The q~allt~~ rF rnateria~s, the process o~ rn~nrrFac:urin9, arr~ tl-~
F~rni~i~eri seckl~~r~s shall €~e su~jeck ko ins~eetion by ds~ s~eclf~na
~r~~ir~ees, S~sch ir~spect~n may be made at klye ~~~~~ ~~
COitS~~l.ICt~~r1, on the orl~ ~It2 after delivery, or ~k bath p€a~es. ~~e
~ectio~°:.s shall ~e s4~#~jett to re~jectiior~ ak any tlr~ne if ~at~rE~~
c~~dfG~r~s fail k~ meet any of tF~e specafcataor~ regu€r~rr~en, even
thr~u4~h sarr«ple sectian~ may have E~een accepted as satis'a~t~,r5~ at
the ~sla~e oaf mar;u~~~cr~~se, Sactio~s rj~ct~~l ~Ftar delivery to the
site sha~€ iae ma~~~~rl For idenkifi~Laki~n and shal€ #~ rer~tov ~rC~
the ;its ak o€~c~:, ~~I sections, hi~k~ are da;~aged ~~yon~ repair
aF~:er delivery +nrll€ be r~~ecteda ~ncl, if alryady ~rt~ta€~e€~, sf~ail de
re~a~ired k~ tl~e s~~~i~yi~y e~tr~ir~eer's acceptance bevel, if €aermitteci,
ur rernaverJ at~d replaced entirely at kh~ cbnt~actt~r`s expense.
~. Irsspee~~ra
d~l~ sectirsns sha11 b~ i~s~ectec~ Far t~ener~€ a~~ear~nc~, dimerrs€c~s,
sa+ar~rEness, etc,
Structural defects may be ~epaire~ (sub~~tt to the acce~tanc~ o~
the s,pecifyn~ e~ineer~ after dprnor~shrati~n ~~,~ the rsiar~uFa~,t~r~;
that strong and ~ermaner~t repairs gill tie made, The sp~~if'~~
engineer, kr~for-~ final acce~rtance ol` t~~ ~o~onertts, shall c~r~Fu~ly
inspect r~palrs,
~~