9.11.2011-liu & assoc-geo-lambrecht.pdf................ . ....... .........
N,lr scow scirr idcl
DEVELOPMENT SERVICE
11L'':$gii<Lt A.1
L,&,-A IobNab. 71-(41
INTRODUCTION
At your rr;rlr.rt st, We 113VC conipleted tr gtcJtecl-rr-rh�al f)i� The proposcd 4.hot-r
plat, locawdi at tht Ea w e Erg dro_h in L-Artlonds. %ashi gton, to address two gcoicchnicaa
iSSUCS: 1 ) setback fioni the st-cer Slope it) t11.l :so ti1ollst corner ireat of the plat si.tc- attldl -2..r
easibiliry o onsitc stoz`r iw.,itcr disposat. The ger`rcral locl-ttiun of1he plat sick k ,,,;ho r1 bang
Plate f %kink-�, Map, ,ittac9' ed ftwreto. Presewed. in this rq )olt are our filild.,119 1,
PROJFCT DESCRIPTION
Wt Understand that the propostd developnneni for the shy is to plat it into two sill=i le-
tamih 1 Wl ing to suic ed 'n i north -south orient rfirr. � it11 a rrc.w sir�fa
resl&nce cobs€.r°u.cied ur1 each of t.hc lots, .For otir tzsc iri this investigation. you provided
its with 2, topographic ,urvty phrrl oftht pha silo, A,, shown on il1i� pian, prQwntcd o;-,
19213 lake Place NE° Kenmore, Wasshington
Phoner l - - Fax486-2746
S, C' 1.) ; e! '1 hc 1. 1 1 0 1
lonsrubt Shon Pha
I hot jobNo. 11061
Page
Mme 1. mi am %�4h sloj'w ol'40`�, or n'iorc is nappcd at th.c souufiQasL corn�,.i:
1iris we slope hare", exwnds inn, the pim Am IN sobAck 0 propiNed
devell!"mun? 11(ml this Sleep �;4)pcd al'T",i r-IONS ILO he Mermined. Onshe My& A
morm runotT "ills $cd mnpervious surlhcog t0he
.;Cd
Planned,
RaMly of Mizing inhimmim uenches, i0cated. in the KAYAg area m die nmh trid
of dh�" i,, To hc L,valumcd,
SOME
To achme die Am purvos,°. vvc prorme a mWe o1sawkcs ckjmprkm! spc6fically the
Rdluxvinq
1. Revic�v gco'lomic and A! cond1uns at mut hi the vublity of' the Sul�ject props rt�'
bused Im a InItAkhed gcMng& map.
2 T',\P1(31'Q SLJhsiirf4ce fsofl and grvindivater con�dition.s in e.!-Le ant a; of pvopos't
in filtration trenches o' thesite �� A baukhou Ust PA to dePAS Awre a Soil Spaum-1
suitable i,(-)r stol-rnwawr infiftymicin is c.ncowsond or M the ii-mximuii-i dt!pth fabout
10 capablo by the backhoc used in test 10 txcavhun, �Oiichcvcr occurs first.
I Cmiduct laboyaloty gradation tcsts, in accordancc -vOth ASTNA. D422, on trio soil
s
4amplcs obtained hym a mqued As t natucs m in the test pits. The it remit , ire
to
be used in deteminirig, die design inGavvion ran of the target soil stratum Or K
accordance ��,jth USDA Texture rfianKle- pt'r Washington Slaic DQpartment of
Ecolou�y --)0 )5 Stormwaler De, 'ip-il \Maiulal f Western Was
4, Prepare a �v-HL!en repon to presem our findings, conchlsioand gcotcchnical
recanmenda6ons for tfic design of infiltration 0-caches,
LIU, &. ASSOCIAXES, INC,
I ,& <,k ., .)i lN,, k. S, I. 1 '<06
Pap 3,
SITE CONDITIONS
Surface Condition
IN AW W ittla!Cd Olr d1 €'zriC m E1t %. of it mswdy to zit.°€:& t'titer ly WON, 17??:f3i'raic hi
p %ate road) to The eam a Qvwse l:aval Mew, to the "m and a§d3W:d hsty'€f4'le-
Tia d" i°a.' iLie,nc;e>s to lht' nonh i€1 d soa.3.:I.t..
- vuwlng to tihc Wpo�yrlphjc Map of Se silt` pn)-% €deb tta us. the iia°3'f' in within the .`s€l4`
gkrm,ally :ilojoc s down gently westerly rly ill Kim ? io IN 3 eic ti gmdo l€} the not6: hemi.
comer area of thc s4er the ground Opes down n;bnh";:°qtNy at Alt pemm or nowe Am
Of the tiitd w about 2 to 3 feet itlsi€ L tJie siLc, then r"3d)dcr ic, to aI`goi_rt 18 to 33 peid.mt as,
it +i'L _;sa�l.rrrl.€e #:�]�.�rs��lar r.rt o the 4stttn�ra5�gIn gthe north cri , t�rca eft the site, the ,.;round descends
out 15 to 29
% house and a detached garap currtmly Occlwy the control side art' tilt .site. We
wWnst;-nd these. Wsthq structures Erg: tc- be demolished to make way for thQ proposed
dco , clt#pniem o the sin Me e gamgc 1s accessed. $ r t a gravelym Awed t %"WWQY onvOng
the bite at its aowl. wes comer, Thc open arez amund the lunt e and the �garagc is mostly
covered by, lavn grass. T)c,)tting tktl-t`tzgitma the site art € ature, very large and tall.
c v ct-rgeett ind dtciditous trees. UKrush covers the ground ahm the nonh a n cast
. HU& ASSOCIATES, INC,
GCOlgic Selling
The Gieolovic Nfav tad
3 �l 3 to Pl. i" °l; lutes P. Mark I';tPt31i41 eLl f6§ 17, Oeok' 8cd `ui-\!� in 19,83, i4si
i lia sl '�a:l fuv llw a'ci71E}gk and W conditions iq A, *ae_ "According, to this
e
mill" iicavi'n= tlta° silt is ial ;soot twhs a and in tht. vicinity lit '' o �,�.lhjc(_t plat P- 13i11��� � $
AWr4;ilicnad H((ds (Qttj,; ,oil unit t:srrdcc Main by an, 01 mq)ia Gr"i\ k,l It ��,r, � _soi( undm t,
The tm1P'iIt163ni1 beds W unk ii composed oF gI.twhd and ?:&i.ny liachl deposhs t:ElPi_.7°s hig
isM, of massive. thick or tin beds and 12t1Tl6Plltt; vF grq IP) ";Jrk grzi io
1 h fine-grained. riitl" ed. tick€rsrtltanal bcds s6i i cvc dicp sio�d. in aall°.cs w st.)rno..
Wir ee twat' t[" rn the ice kont and in fftM11 s'4'mons p!'Aw to fl-t a( sn.ec of dic glacPll
icll , V C Si;dt lerjts vvert� rnostly depot ,iled dUring thc transi.ti:.rnal pl�;Iiod neat 11I.0 Of
pre-l:=rascx iotcrghchl Oyi pits lnterglticiat.it ir) Anc and into earls Fraser ghiviaj tines,
f`I7 tr.rrrr itior7f l beds depahs generallyi re �titl (s 17{ttr_i at d kit exlreni ll 1���;<
psi°rr r:xrl�ili( in its natural, undistrr bed main lids soil anit, larrwov r, was not
etrarr_tnrned in the vM pits excavayd on the sitz
The 01l� pic grax l soil tt.riit is composed, of stratihed sand anti gray .1 with. vcrvs, minor
arric:runt of gilt and play, dcposited during the 01ty spirt intr,i-glaciation. Late to their
generally granular con1positi n, the depo;sks of this IOil Unit M't OF t oderalelt high
perntcabiiit) and drains Nvell, The tiepcask had been gJaci illy overridden and are
generally e°;lSe (r_r vtn-y-den c in their natural, undivir bed stato except the Geis Ow On of
soils � hich al-r- normally wQathered to a loose to state. 'Fhe widerl) ing
IJU & ASSOCIATES, INC,
1.,.., ii i1'1[=N'M _``='ill::: Pim
e,&A ?l'sb "o, i.;.-()6
Pace 5
U;l1 Olympic mpic g6-i:wl dsrollosks in diAr nrtCiw R.ndimsa cd st ac can t'tii ide vtwd
b3!L1 da?don NupINY1 svhh 14-d'_ st''L(lemT ml. c-\p '-t»? d for i gAl w it1LbC er'° i�.`ly 1. c i\
uH Undilion
Srib:}tii"ib ce cotislrtkns in the <ai° a at We ili}nh 't-Id of ii1;� sits' vvcl-C` ::X[t'.aw: d ,N it[) iv"-) Imst
pim. .dies€` test pis a:'ere i': c a1'il ed on ?it,i`."l1m 2Y. 201 F w4h ;a t"il ;'Saw€,"iced backhoe to
td )3t[l ;1 .i,t and.' l ,t, it t ?'t?�iiii'@t I()�` ttltlil 0 .:1C t%'."+i �is� >l1-V �1l#_P%it1 € ii Me 2
- Site and Expit)1'eldmi I.C`Mon pl,n. vie est p, were located -,vith tither a tape
ni(:il Cii".' fi.3?' bv ;,'i.:iit ii Abi''iii > eximb" tc�[ t1 t'4a} 1d)e' ;3I111 ti €n ilia' 1€i ltW ttilzi ;�tl Ell
topi)W,iad3h,iv' 4,tivq nmp. ztattl tkla,ir loa,mk}ii:s should be
111;',astlring method t. td,
/k gemechnIal tangbiecr Cron-i our ofrm 1,1 a s prCsLmt during sllbsurthce cxplt?r ation- i1, o
examined thy: W and geologic Condiiiilals etin3ti.imm! mid 4'i'ti ly1tted logs of rol ?&
Soil samples obtabcd Rum twch sail [ Ytr in the test ltit,� ,�Qre visually Clt$4MMA in
genera a���€�tti$�i� � j�'itdi. i_�riitl cd Soil Cla".si is atiom System. Li Copy cal' which i5 preserml
on d'law 3, DMW ds°-nY'tpt1:ms of soils exiC:t intemil ±ile cxp[6 rafi n Fed"e
rt:.sented hi test pit logs on Plate 4,
Both IML pits ivavot►ratawd a Jaycr of loose catg-poic topsoiI f-rom 12 to 19 inches thick.
U,ndt lyiaig the tsilsoil is a layer of weathered sail of low to mcdium_dense, sligditl
iltyiMe tst1110L 'Ni h za OMCC Of'Ac gnuM and st,m, roots, aNym 2,0 to `?.9 feet thick. Tht
weatii ,red sail is un dMMin to the dq)ths explored by a dark -fit-€ -wn but clean t;posit tax
Hw�
Page b
UCSISe., MWdiM-11 10 LIMSO Sand, vvidi it Iface oV nne grmTL TO kposh is imnMracd as
11-w- ()Iympic grz'lvel soH un'it.
Groundwatel, condition
GrowdwaLcr Pas n(A encounlered by ci-ther im phs excumed (m the W 10 topal
vveathurcel soil mul MY vaiderlying. Olympic gnwcl dcpo, it salty all of moderately high
permcabiliq and mmid alknv sturvivalm to wep thimigh cu)d\Vflizr iy.-d-,1(Yxii1g into
the ground %\ Ould per(I" on the surAcc, of a 4�m -ptrmeahil A, One-glyined deposs at AUVII
ftp�h thai ii `;hould nii�,,imal or no mipict on We WOKUnIp. of W, proposed
WSCUSSION, AND RECOTHMENI)ATtONS
ONISITE STORNINN ATER I)ISPOSAL
General
Based on the ,sod C.tMd"j0n etivoun.tered tie test pits cxcavatod on the plat it is' our
opinion that flan fi,tsh (.)I,\mpic WwvO dcpcs,�it of clean mMiwn to coar.-ie sand soil undcr
the nonh. crid of the sjLtat shuflov,- depth should be abic to support the proposed
illfillralion trcn'Olos for disposing onsilt. Construction (if -,JIQ infiltration
uTnches should be monitor cd by a gcotechnical engiriLer.
Particle Size Distribution Tests
'rwo s6l smapics, olitained lion-.i Test ]'it. I at 5,0 rtel iref. erred to as Soil Saniple 'I) and
Fest lit 2 at 4,5 fiw (rcl'erred roas Soil Sampit, 2li(do-w grade, we NeIccted Rw Ptji.'J.p
HU', & ASSOCIA'YES, INC.-,
I_.&,,A ,h' , No, 1 1 iits.]
Pago
Qlupk gravel dy0sh. Ise e 1"qxWS of these lees :.:3"e on Plawi `..A- l un V,2, i?-i
the auached.APPENDIX,
As sho"n LM We MOR SAC D+aa'1binion test re.'l',' irm NO Ei:rl sample"-, %� elm co 1po` vY,
of ,�:`Ya cfly line 10 coaNe S'slM Odi .t ?.3:.y �:ont rnl and g-ravQl sand QOI-it�-DL of
91 .0yti for "Sod E'aaniple 1. 1did cla.l t'onte)-o of Ws and gravel sand : t`ilsent of WON Or
Sod Samptc 2. Acowdkg to die t ISIM 11mv l t krtngle Worn U.S. DepAftmem A
r gricultur } clyin.shown tyr t'l:jte A-3 in the mWed A°p n&Nl boll! soil 'sanlplkn, cm
lei Qlassiflc as '�'knd _ ,
Design Infiltration Rate for Intittration Treuches
Ile slonim"ater.. i � �t� t� It � a 1 1or cslern ashingwn., ` 00 Edition, t ublisn"cd
by Wai.slltnul:on State Dq-,arinicnl of Tko1+ gy, is used io Mum the duA n r:rr.lrltmdun
nae (4 the tti get ,�o l for inf-iltt-adon trendws to be constructed at th nwih end of the
yOme site. According to Clio table o ����t�r����t��l�t� _ rl�tlt� €t9���r_._ ;rt�5 B_asyd on US_I
Sgt. lap stzov n on. fllat.Q A-J, the short -tern; infiltration rate is
estirnated io lie 9, i b (inches per hour,) and thc, longqcmi inf1hralion rate 2 iph On NO
soil samples Oassified as -Sand,
As shown on the I arliclt� Size WANOTT test reporti, the j size ate size off 101v
passing') is tiM24 inch for Soil Sam.plc t and l`rO790 inn f-Err Soil Saniple 2, According.
to the table €s1 Alternative Rectmi-inie,tided hillIft rtion Rates Bused On �`�,`st' .._�.rr t �gio�z.
l.:i:t.mhrccll.t l=.E.lrt'1 31
l ..& AJ olh No.. 1 l -00 I
Page
l G tltl a l-°Ia-.`e—tried m Saw zN- ,. 111C �'Stim lted lt7ng-l4'a`in injilvation Tole is ISR illh ,1t ,
�So l "°F,_mnpie I and 1 49 i'ph I -try- Soil 2.
Based s.$Il [he c€bo:.`t. ;0.'e wLtmar emi a design i. 11 t atl.3. n me o 1.5 iph €1C.- use 10- the
design of tJIQ infilti'i:Oon' Lvei a h,,. "o he E:t'1$'1Ole I1orill emd Edl si ol. 3he ziilt',
FnAhr uon1"UncltWSWUc°ti01'1
The trcnnh.es Sold he salt w Writ. 6 inches into t1ic tmdcd) ink cican sand. of 01y3 pia:
Cj31'€ vel 1h1 osh, 1
1, ren€ i IE"l mrt� t ' o l layer the lilsilt.it1. on "Lf-c'i"clws �%ould 'have a A
€ xcai ate . at least 15 No de, The
W t.ink w lis,jmn o 1ttt ltrt Lion ti°cncha,s should €l�f
The iiffliti ation tr;;nclics should 'he set back at lea m r Met froni $31Y. peri.�, litws, c1t least 8
Ftet iruni nearby building 1'oundationn and at ]cast 20 ieet J.'ron-i the iop ofthe steep
of 40SK or nme. Vic .soil uNt and tmndi €m hnnk sralflity _simuld be verified b� a
geow,chnical engineer during, cy,cavalion.
The schcrfi is presentation ar a n hl iiltration tr unch a siggj dispk� rsiw l-'i 'Q
on Plate I The infiltt'at Un wendi should bk at least 24 v�idc, ['he schematic
rc-se ntatim ofan iiltiltrattio�n trentJ xvith ii-iuldple dispersion pipes is sbov n on "latc 6,
multipic a ispe lion p4pok if used in a n Wiiltmtion tTench, should e plactA at least ? hei:
W the tr nsh Yvalls and s a ctd at no closer than 4 t et on celi 's,
Lamt
page 9
Pie lido Nval1s of the i€'enchm should be lined 00's a la.Nwr o n;;innt'4mn Wy 15hrin
(Ji a. MRAI-'.1 140NS , .T"hQ t;`ektches are then Ned &I c1t �n 4 -1 to 1 1 _ h16-t
ag: Nel Or LIUsh d iock ttiiWhin about 10 {Fhihes ( the 101sh `yrLade, llwdi-,'r.cn3ion Qw—
s1 .mAd be L.oFhshsac € d of Qnch rlt? 1 PVC t.ti'ta s and Ea:ikG level in tht, gnia i' of k;a`u` hccl
a'ock fiflcti Irenches at. about W bclkm' thy. top Hw top ot'010 o.,
cru.;l'ic rock- €i11 shoa. d So A L4ov ri;d with the lilt r Fabric ita1 r, Pic remain hg,
tre ch.:,�5 should then use h,Ea.Med w tlh Mlla Ckd tail-itt= �`lftN.fft -,0flS �qa€sr'th��� atit a
;mpg taed twee paved dKe"ays sih;ndd he rort ed irate a t;m h NO eq,.t t pcd AT mi oil-
V Uter ,,tlial`alot" ;0b?e 1a� 114 g. mlo th.L: €nfittrf")trail trenche".,
SETBACK FROM STEEP SLOPE
A�:COUi.t1�, ter tile tc� k)'�E akp hic. niq pro idcd Io U..J a Std?ep s0pe :is ma pj-%d £t. and to the
ceaam of the wi:uthcast k`orateia� gal, the site. 1,11i's SICC? slops dtt� :a a1C1: I'lorthwe—Sterly at
gra,des Of 401',�'u or tr orc: from olf the silt to Mthin about 2 to 3 In inside the eam
h41wnkiaur� of the flwn ticcr a,:; s To abota IV,, to 3 Pa as it �xmtiial cs f4rthQr into the
sits:. According to tiie abovc-t-cferenced geologic map and [he soils encouaat: d by the
jflvi e\ avaaled oil tlls' thl') �"Itc .j�; underlain at ,,J)al1ow depth b\. dense sand s.1cposit
of the 4:: lym. sic jYrit�el soil, unit. 'l'ltis ticposit is of modera le to high shear stfeng1h and is
gaits stable, it is ail�o ofmodi roi ly higit erne abihi and widd atl1m sa rm runoff tea
;� t into tlh ag tar it .1..1h �-ei��tF�, d li �itm h� iza rd,-;, such a s crosi €t, l nd.Ai e and
sci.s.mic damage shOUICI bt 111irhiltltal within t11�, site", it: is our opitljon that the lvopost:d
developmcm for the siw t-a-aaay be yet back at da horizontal distance of no less than 10 ficef
from the to (,-)f 1t"3% m more slops ill the area of I.he southe"I'St. CornCr of the °site.
..AU &ASSOCA . INC.
E.
Page 10
TO €'><,11m! ha ,s been piel'til'ed Ar the sptff:E' �1pplaL,aplon 10 dos ptje l Ar die CXC'JrlS ;:
use l'y W, Sa lr7s'bcr atld hiv tnsi_.i-oa ies, I'k'pn:serlwlk C-- wnsulf an' '� iInfi
recommend alma[ this Ii"1 It a '3€1i 'lt'. be 1t1dttt.lez.l in Q pPq€ C amraci tAst
£ €. rien;
to :iki', [%t ��,l3a lli�t;. of 111e ProspecT..1tie l:mla:aC.'[iys Ar Flit: r 'emallPtittllaa.;; and 1"7t'diling
pmpmen andt6t' c }€�iplia c ) hti the rC~CLMY1lTli:?`IdMltMS ill
1C f:a'n u"'i.ons and €nIl`,rpreCillions in ihis 1`t``pin , laoe'C'.ven should nix be t-+.9t�;�al"l7tt� as I
Wain"'111* of [lie s1.lbstll'fh C`,ielidl[Ion , The sk,,o t of ijjis S[Udf d0t? ! MA i.l'lciUdi; vlCc'
rclaated to ccriglruction ,MY, pmE,`mlli€ ns mid our ret' t11711'?'ai'.rulutkns are :ata in;,ctli:j'&' d to
illl-t c flit ti t�r1[Y ti t: 3a`' Il1 .F1'1t5 Eti" techl)iques. sequences o.r pi.-od.'c€"u1- ', '1 z—xc pt as
spe{ ..ally described i€'1 rlii:� r°tpmt. A ckgg[a a w:onddui$1iims_
t_Alr ar:t.d C7011CIUSiOnS am based on ifie geologic and soO Condition;
enciaunteI:S A [lie t€-st pits. and our experjanec alma en in.cering judunicat, Ili
Cone=liltiions and recoannendaliow, are professionil opinions deri%,ed in a ma,ili.11e
consistent %vith dic level of care arxi s iYi ok- inatr"ily exercised by odwj- TJ-Iernhei' of the
prolission curyently Im-E€c:tic.irtg under similar conditions in this area. No w-arranty.
cxpresseri or irnplicd, is made..
Thc actual subs lrts€c°e conditions of the site may v ar• ar•om those encomilered by tie test
pity. The n awe and extant or such watons nmq mit beconic Q idcw until constru(nion
starts, If wM<atiow, a pp a r tl IL We AM be rmained to rc-evaluatethe,
L�lmbrt'uhl Sdho��-1 Nat
Ammomm
Wt last to bk� of scl-OCQ to yot.1 on fllproj'�'Ct. Ple.'Tse 1"ltIfi-ee it) kx'T-Mot k15 ilf.voll
h,n t aw, ques6ions ri-,gardimL thl"; llcPolli Of, Cm-01c"r
Six PlMe,� ilnd
Yours
A FFS,
S, 111uhani Litz. Phl) PJ"
LIU & ASSOCIATES, INC.
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VIC
I N ITY MAP
L MBRECHT SHORT PLAT
SITE AND EXPLORATION LOCATION PLAN
LIU & ASSOCIATES, INC. LAMBRECH,r SHORT PLAT
9441 OLYMPIC VIE01 DRIVE
... .. .... .. .... .. . .. ..... ..
EDMONDS, �NASHINGTDN
87i U.") I A
.. ...... .........
W&UP NAM.:
...... ..... ... ....... . ... .............. . ..... . ........ .. .. .. ... . ......... ..... ....... .. .. .. .. . .. ... . .. - -------
GRAM
57 E (I R A On. Gp
.. ..... ....
G RA ON E 1) GRAVEL M& i GNI MTV VQAQ�.
F i
. .. ....... .. ........... .......... .. .. .. .. .. .. .. .. .. .. ..
CLEAN WELL ��2DHQ of'
.......... ..
AMR&E FPA�AA SAND WUH swl so 11 YON L:
mmNo N2 4 vlws ONES
VLA 0 V
FIN& VAT ANU UAY
GRAINED LJQ,
. . ......... ....... .... ........ ....... .. ....
L
MIGAIM f OL
'IL
PAO R E -�A N 00 Q 1 Y At -if) M
chi
OR G.A N'l C OH
HIGHLY ORGANMU SOILS PT
SOH._ hAUST'MyEl
c3S,C Al ! c1t; MI 1.4 - DR e - ARMIME OF MUSS -U MY EN
Cl U
1"AHM MUM 710K VC57YE No!
A�IMJ W ±81 33 Fk D_ANP,
--� , F 'QUN7 DAM VQUAL BA"ET o - ViS,1�1: ',,ATL Cf. ELL
ANID, OA J,7�1_�A_.L.Ly SCI3L r�> I-
WATUR TABLE
U dk A S S C 1 ATIGS, I N C. IGNIFIED SO,'L (A-ASSiFICA"PON SYSTBA
PLATE 21
TEST C PIT NOa 1
L..�...�.........r..�.W.r._....._,.-,W _..�._.. � ....._. .._.......
i
9
r.
l
Grga f - �r-lv fille "H".4. e.,. "vit ? 'I,-. C!(';+ .w...,. ...�..��.....,,�....,..�„�-m,..,.,.m.,.�„_.-..
_.
3 i''Esau . i:b yeti ICT-i-onP qt`i -,It
e w,lh dry
Y
W
SA- SE.4.':ie€€_.i fE_ ...., -
3
qi s^ 3
f I I
� W
E ,wry i i
i� _ E
i -,5t Ja; .ZuYI?i.�ic2wd at 8ft. p;3sjnd,,t'clef 3iot a}is.,all?Eed'ed
E 3 `
1 3 F
`BEST PIT
r .:
- �.�; -i rs -a .
uti `,.,,j
„
E
0L
Dark, -brow:), ct,se, argranx-, P>oty =-e `SAND, wah roofs, dry
�TO SOU
mm�
J
I
sp
Brown, Ico�;e to reefer€-denEe, s4ty, f ne SAND, ,race
on ta
L`g�-av `izz , with Ss,- dfj I
i
E
F
i
- -.. -- .- ..- - -.. -. _ -
i
F
i
grAvel.. Ino, st i
I
£
j
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F
1
;
3
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F
Test p3'tari mated ca? 7.& ft. gtou 1dti0c` ier not encouritered,
i
LIU & ASSOC 1A.'FES, INC,
Geoc ., s":C"ei ram' .v ,i (-'-iy inem Io -- lJh L—etsce
TEST PIT LOGS-
LAMRE HT SHORT PLAT
EDMOND- -- — —
............
A
j
7z 0
iy
4 'A
Q
Xz
INFfLTRATION. TRENCH - SINGLE DISPERSION PIPE
LIU & ASSOCIATES, INC. LAMBRECHT SHORT PLAT
9441 OLYMPIC VIEW DR.JVE
.... .. ....
'Gleoiov
EDMONDS, VVASHINGTON
� €1
I
1�
t_
LE ..
6,
_
-.2 kr"
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ffi to
1,'4
1
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INFILTRATION TRENCH - MULTIPLE DISPERSION FIFES
ASSOCIATES, INC, LAMBRECHT SHORT PLAT
9441 OLYMPIC VIEW DRIVE
-'( .cx3. Ems? °a'� i�3DaS, ASHIN�7Tt,. N
.... ................ ................... ..... ...,......... .........- k"',�... .__ .. .
APPENDtX
Particle Size (Jrad�wion T�-,si Report,
1 -1 Wht Sh011 PliA L—Illbt 1
Q44 1 OilvmpiQ Vi,,�,�k t
L&-A Job No, 11 -f)61
IJU & ASSOCIATES, INC.
'.�'FLVE
PE-RCFNT SPEC! PASS?
SIZE
FINER PERCENT
r
.12
9jjj
175 im
1 9
().".1316 nun,
O'TM rcw7, I
mm"
wilt.,
-mm.
3j)
FFF
auii Description-
Atterber-a Uff �its
GG'dfidentz
D i. '1- I 6
D'.
I - D5()
D
Usics� sil-'Sm
AASHTO� A
Remarks
I -, : M -= U 0 --:
Sample No-, Source of saniple. L--A�n�dhl �hun p"m 4"
Location-
. .. .. ... . .....
.. .... ....... -. .
1m, 4
Date,
Robert Alkman
ASTM C117/136 Particle Size Distribution Report
GRAIN S17F rnm
14 GRAVCL R sAND
CRB FINE CRS. R
J I
FINDS
611 -T CLAY
PERCENT: SPEC �" PASSI
s -211 �D�--scemt�ow
HNER
371!; in.
0
i
V)
I
PL= LIZ
-
pli.
I t
0'0.,06 Vim-
D&j=
D, Ij Di!-- u,l-'-7
,
D,
', �) .6
0,00-5
'j.0iJ f
00
U S AASHTO=
-I -h
Sam.*� No., rAI,7 Source of Sample; I-wnbiv,,b Shc,,ii Mai Date,
Location: LIOWDepth! 4, V
. .. .. .. .............. . . ..... .. .. ............ .. .. .. . ..
Client & Project
...... ....
,i
=O„ ImamIF
s v'
t.I 1�1
USDA Soil Textural Triangle
Table Recommended InfiltratiOn Rates
based on USDA Soil Textural Cla sification:,
}a3tr "i�€aa E.56m.11rd Lo -Timn
Sa rl �`¢=c1 ('l €sa+�feEa�aaz4 f tkc� _� [€�fat�=ieite
Loam 0,5
. ttt6
y
a. 'rnr 1'aIT SC U. 199-4,
Wavoka i A cup!" tihan loon Mal W Tdhk 3A On odd bi:
won sidural ;or Owmim I M hoe -,i;! ,bc, dt'i,",i'-,I..ak.
ILK! 01 Yj PWIMIUUM! is nmQawd, vF " hurn si---
condAW, an MyNy vw WAQ or uncowl. Thne iwak"s kquk W.,
wc of W, InaksmiuBal j udgnaem by dw sho wTkea and 1c ummnal A'
die loom! ,%?t Qum% and N41nonaine 11wi mid a Bawl!
honing p0i may be PqVmd by Me hwal jukWcQ),,,
Z,AIIN4 (hadmigm I JAW n� Full " -�Aj,�JEi i
As an aheandve T�&,�c 3,7, rt�ucw M,wdiQs by \:I, -I ---,In,- lmt ainJ,
WO) wua und to dwKep ke cwWon pRoddsi A laW 18.
jniIftra�ion
to gmdmln dMa cKekiped Ung We AS EM procedure
;ASTNI D4221 i be phinwy d141 b%Ui,�',Iixw� a,'Id
Bk19tNWHOuwkwl was aniW(981"oWW hfihrwo)n
:,IW uno on 71hormon Cbunty sjits- 1 lo-wev-r, Ma"":111ann x1d
Aso included United data ffioni and CIrk Cotmy in TI-v"ir
wwboh. This tablu providu rocomumcnd'-d laws
havve bFC3 'n cornzlal�:d Io suil j-,radat% pammatm uArg Vie AN I Y-I
soil gradadwi priweduro.
1154 IS can he Lned to eahnaw long-temi deign WhAwd,n nw,
A h"Cib, Rm SOR �-rlda*an :Lfllj�-Ct €kl the app-rov,-"I" :A' " ",": "',
j u WISH. As is trua 411% 3 3., ihc ralt� inTa'blc
IS apinswu average far[ dhions i-egarrding she vahaWliq` the depre of
maintenanct and preircali.ocnl Rr TSS cNmoL lie hngwn�-j
Wltmtion rates in IAW 31 may nwd to hc dccroase' ifd--�C sitc, $5
if Ujd jltffij�
wounHA The data that Comis Cho basis fo.,, Tabh�r 3.9 wos frow, -soks thal,
L lc l la
led w -iaads, ur `�indy gravels, No daia avaintblv ]�)r
flintr soills at the 0111e. the toffiltwas 1,8 qhoulcl
lit WCd for.qods wRh a dw SW (10% sizc- I i SlCd) lcs"han,
(U-S- Szawdard-,icv��),
Alternative Recommarided Inf-Iftraliou
RHkaS Dasad on ASTNI Gradat3an TG�Ainfl.
D,,r, Stze frorn AST11 D422 QH
Gradation TPM (mm) Infliftraflon RMe
0.3
K,,kg w MCA ftlAW',4s finf .,ZamcnLo�ptqblfi?y
i-,abrzjsq 2005 Vol wje Ul -- Hydgt)logic Arzwysis and Fk)w COPIODi WVWS
A
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