HomeMy WebLinkAboutEngineer's OWTS Design PlanK-CROAT/(P.0. Bo:r- rJo
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April 16,2024
Ted White
Garfield County Public Health
2014 Blake Ave.
Glenwood Springs, CO 81601
970-945-6614
RE: Onsite Wastewater Treatment System Tank Replacement for Behlow Project located at 89
Fairway Ln., Glenwood Springs, CO 81601
On April 11,2024, K-Cronk Engineering, Inc. had a meeting with the owner of the property
mentioned above to discuss the Onsite Wastewater Treatment System servicing the existing five-
bedroom residence. According to the records obtained from Garfield County, the system consists
of a 1,250-gallon aeration tank, followed by a 15'x15' seepage pit. The owner advised K-Cronk
Engineering, Inc. that the existing tank shows signs of damage and has been leaking over time and
requires replacement.
The existing tank must be pumped to remove as much waste as possible. The bottom, top, and
sides must be crushed in to ensure the tank neither floats nor fills with water, and the remaining
void must be filled with gravel, sand, or compacted soil.
The owner may wish to add up to three bedrooms to their existing residence in the future. The
owner would like to plan for this expansion now and size the replacement tank so it may
accommodate the eightbedrooms. The exiqti+e.sqqpFee nit is not lar,se enough to accommodate
a4v eloansion and will need tp be repl?cpd i+ full ryhep the additiq4 is construc,ted.
To accommodate both the existing and future bedrooms, the following tank configuration is
proposed:
A 1,S0O-gallon, single compartment septic tank will be used as a settling tank for all solids. A non-
corrodible Orenco filter (model # FTW0436-28, or equivalent) shall be installed at the outlet tee
of the septic tank to limit the size of solids and sludge passing through. The filter must be accessible
for cleaning and replacement from the ground surface. A 1,O00-gatlon, single compartment septic
tank will be placed down-gradient of the 1,500-gallon tank. The combined volume of these two
tanks will provide a minimum of 48-hours retention time for sewage generated by the proposed
project.
The tanks are shown in the enclosed graphic. Iqstallgr may a.djuqt the locltion ?nd/o{ or,ientation
Cs nqeded to +cpommodatp existiqg site conditions and offsets, The elevafions of the existing septic
tank and effluent lines are currently unknown. Should existing conditions limit the feasibility of
replacing the tank while still maintaining gravity flow to the seepage pit, a nreqsgrized svstem
rqav be requifpd. It is the owner's/installer's responsibility to inform this office of any issues
once the elevations have been determined.
LIMITS:
This letter is a site-specific design for installation of a replacement tank and is applicable only for
the client forwhom ourworkwas performed.
The recommendations and design guidelines outlined in this letter are based on: 1) the proposed
site development and plot plan as fumished to K-Cronk Engineering, Inc. by the client, and 2) the
site conditions disclosed at the specific time of the site investigation of reference. K-Cronk
Engineering, Inc. assumes no liability for the accuracy or completeness of information fumished
by the client. Site conditions are subject to extemal environmental eflects and may change over
time. Use of this plan under different site conditions is inappropriate. If it becomes apparent that
current site conditions vary from those anticipated, the design engineer and Garfield County should
be contacted to develop any required design modifications. K-Cronk Engineering, Inc. is not
responsible and accepts no liability for any variation in assumed design parameters.
The construction of all OWTS components rnust be done according to the currently adopted
OWTS regulations for Garfield County
K-Cronk Engineering, Inc. represents this lettor has been prepared within the limits prescribed by
the owner and in accordance with the current accepted practice of professional engineering in the
area. No warranty or representation, either expressed or implied, is included or intended in this
report or in any ofour contracts.
sed
Ka*iz-//e E O-rrZ
xacUayt{h.. Cronk, P. E.
P.O, Box 140
Mack, CO 81525
970-250-0572
Enc:
Tank Replacement Plan
Garfield County Record
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t0ilAL
Nt]TE
THE FOLLDVING SETBACKS MUST BE MAINTAINEDI
SEPTICTANK ITA
SPR]N6S,/VELLS
LAKE/STREAMIIRRIG. DITCH
-
50'
INTERMITTENT IRRIG. DITCH-10'
SI]LiD PIPE/LINED DITCH
BIMESTIC VATER CISTERN _50,
DUMESTIC VATER LINE
-
10/
STRUCTURE V/CRAVLSPACE
-5'STRUCTURE V/I]CRAVLSPACE_5'
PRBPERTY LINE
-
10r
100'
50'
e5'
a5'
t0'
100'
25',
?D'
10,
10,
10'GATED PIPE
oreq of--\ z"""'"::>t'
\
\
n
____
opprox. Iocotion
exlsting seepoge(not lnctuded inof deslgn)
of
plt
scope
1,000 golton, singte
cor.lportnent
septlc tank
opprox. tocotbn of
exlsting tonk (to be
obondoned ln ptace)
5,
,!,ln,
0r
ol
,(_ {,' nin.1-
NT]TE
INSTALLER |,lAY CHANGE
T]RIENTATII]N,/LDCAT]BN NF
TANKS AS NEEI}ED TT]
I.IAINTAIN ELEVATIBN ANI)
iIFFSETS.
Ni]TE
THE EXISTING TANK MIJST BE
PUMPED TB REMflVE AS MUCH
VASTE AS PT]SSIBLE. THE BOTTEM,
TEP, AND SIDES MI,JST BE
CRUSHED IN Ti] ENSURE THE TANK
NEITHER FLI]ATS NNR FILLS VITH
VATER, AND THE REMAINiNG VtrID
IVITJST IE FILLED VITH GRAVEL,
SAND, NR CIMPACTE! SE]L,
1.500 gotton, singte
conpontnent
septic tonk r/
efFtuent fltter
existlng
resldence
ctean
out
NOTE
CALL 8II FOR UTILITY LTICATES
LAYEUT PLAN
rc, ea?4
7'=?0'
{
n
NORT{
PRtrJECT
FAIRVAY LANE
-02-032
s
o f,'*#This doot not
or ure pcrmit.',
i
CARFIELD COUNTY DEPARTMENT OF ENVIRONMENTAL HEAITH
20tt gtrt<e Avanue
€lenwood Sirdngs, Colorado ElO0l
PErcHAIUEO .FEg OI{LY
INDIVIDUAL SEWAGE DISPOSAL PERMIT H" TS'
Ken ilalbyOwnsr
.{
it'. I
!
,l:
..ir,-
Systsm Location 32
Licanrsd Contractor orntr
I Conditional Construction rpproval is hereby granted lorl l.e$0 gallon
Septic Tank or X Aerated treatmsnt unit.
Abcorption area {or diapersal erea) computed as followr:
P6rc rato of ons inch in-J- minuto$ requirer a minimum of J15 rq. ft. ol absorptiqrlnrea per bedroom.
Therefore the no. of bcdrooms 5 . l?5 .q. ft- minimum requtrement - a totat ",
jL ;ft. of absorption aroa.
Mayunsussest: 14' squue lnd 15' deop DEEP FIELD (l?' of aggFega te und leach llne),
Date Aprll 22,1976 lnrpactor
EINAL APPBOVAL OF SY$TEM:
No syrtern shdl b0 deemsd to bo in compliance with ttre Scwrge Dlrposal Lawr until th6 rrssmHod $ystem ir approved prior to covcr.
ing any prrt.
%-ffi*rcleanout to within 12" of finel grade or aerated accers ports above grade.
Proper mat€rial$ and assembly.#-
4re"-*Trade name of septic tank C.r*-e..
&/
Adequate abrorption {or dispersel} area.
Adcquatc compliance with permit rcqulroments
Adequate compliance with County and $tatc rogulations/requiremenr.
Other
%.
' ,.!
I:i
n
i
:i
r
'q
lnspector
RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE
*CONDITIONS:
l. All installation murt comply wlth all requirementc of the County lndivldual Sawage Dlsposal Regulatiom, adoptod pursusnt to au.
thority grantcd ln86-*4-4, CnS tg8& amerdsd 60-3-14, CRS 1963.
2, Thls pcimh is volid only for connsction to structursr which haro fully complied wlth Counry Zoning ond building requiremeng. ,
Connoction to or usa with rny dwelling or itruciuroi not rpptovcd by tha building and Zoning office ghall automatically be r vlola.
tlon of a roqulrcmsnt of tha pcrmit rnd causs for both hgal rction and revocation of the permlt.
3. Soction lll. 3.24 requirer any prrron who conrtruc$, iltsru, or instrlls rn individual rgwaoe dhposrl ryst€m in a manner whidr ln.
volves a knowing and mrterirl variltion lrom the terml or speci{icrtions contained in the applicotion of permit commits o Class l, l
Pctty Offenm {$500.00 fine - 6 month: in iail or both. i :'
asrated trottrnsnt un
A',iaAita (llliaial
- Oa.mlr Ullriaa l'*n.r Aanliaa*r t:,aa^ ata^r,
-9Fees Pald $-?S'%
Date -;r:- *7bII{DIVIDUAL SEI.IAGE D ISPOSAL . SYSTEMS APPL I CATION
'" NoiiFrcATroN 0F pRoposED DrscHARcE T0 r,rATERs 0F THE srATE
INDIVIDUAL HOME SE}IAGE TREATI'IEilT SYSTEI,I
Attach separate sheets or report showlng entire
topographJ of area, habitable buildings, locati
tion test holes, soil proflles in test holes.
with- respect to surrounding areasrpotable water wells, soll percola-
O+ner:
I'lall Address:Clty;
INFORMATION REGARDING PROJECT SUBI'IITTED FOR REVIEI,I
Phone: fsq'f-
on Unlt Capacity QfL
area
on of
pl
i ty or Town
Si ze
I
6.
Locatlon of facil
Legal Description
Itv:
llo. of Bedrooms P Septic Ta Capac.i2 t
3, Source of Dornestic Water: Public (name)l
#Prlvate: l,lell
--
Depth other io first ground water table
4. Is facility withln boundaries of a city/totn or sanitation district?A4: /.V -
5. Distance to nearest sewer system:a
Have you attempted to amange a connectlon wlth the system?
If rejectedi what was the reason?
Rate of absorption {n test holes shsy{n on the location nap, tn minutes per inch ofdrop ln water level after holes have been soaked for ?4 hburs:
7 Name, address, and telephone of person who nade soil absorption tests:
8. l{ame'dress, and telephone of person responslble for deslgn of the system:
9. Express ssion is hereby granted for the lns tion of the above rty by any
member the Garfleld County Environmental Heal partment and/or persons asDe
they may desi
acknowl edged
9na
by
te, Any wlthdrawal of this
the County Envi ronrrental Hea rtrnnt.
permissiIth Depa
on shall be ln writing and recelpt
pec
th
prope
such
10. I have been given an
Garfield County and I
lncluded thereln.
opportunlty to read the Indivldual Dlsposal systems Regulailons ofhereby agree to comply with all terms, conditions and-requfrements
//rt/tt
gDate/ /
PLEASE DRA}I AN ACCURATE I4AP TO YOUR PROPERTY
a
",
tr iLI
l.-'l:"#"k flro
{lrn F f"fr/t f
lilr,fl"n
I
,
frl-
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L D t 3L
I BELOI{ THE r0t{ 0F BUILDINGS SUPPLY AND DISTRI.
DRA
EST 20t I
VCISKIJIL. C'PEFIATICINB.
Scope of Work - Septic Tank Replacement
Address: 89 Fairway Lane Glenwood Springs, CO 81601 - Garfield County
Overview/History: Existing 1250 gallon aeration tank shows signs of damage and is no longer water tight and requires
replacernent.
Anticipated Excavation Start Date: Tonks srrive May 7j, 2024
1. Pump and wash down existing old concrete tank. Based on soils and site conditions, we may proceed with the
following:
a. Crush tank properly, fill any voids with gravel, sand, compacted soil and abandon in place OR
b. Remove existing tank
2. Remove any saturated, contaminated/unsuitable soils from excavation area and dispose of properly.
3. Excavate at the exterior foundation wall of the residence to expose sewer line and install exterior cleanout.
Excavate and expose sewer line at soiltreatment area (STA) in order to confirm proper slope and grade in order
to perform the following engineered plan of installing 2 tanks as designed by Kachayla Cronk, PE. lncreasing
tank capacity allows homeowner to add 2 bedrooms in the future.
a. 1530 gallon single compartment lnfiltrator septic tank and
b. 1060 gallon lnfiltrator dual compartment septic tank
c. lnstall bio filter at end of system discharging to STA
4. Backfill and compact evenly around the tanks in 1 foot lifts to approximately 6 inches below the influent and
effluent sewer lines. Make connections and install inlet tee as well as effluent filter.
5. Schedule Garfield County lnspection and inspection with engineer, Kachayla Cronk.
6. Complete backfilland compaction. Site clean up.
Thank you,
Jorden Voskuil, CWP
NAWT lnspector lD:rTc
NAWT lnstaller lD: 17085INS
Voskuil Operations, LLC
PO Box 312 New Castle, CO
970-384-2487
jordenvoskuil @ rocketma i l.com
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lnflltrator@ Poly Tanklbmt
rm ltSG2GP
TAI.IKTOP
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ELASTOMETRIC
175.6'TANK
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(86)TOP VIEW
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DOIIEL(1eI TAT.TKBOTTOM
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@ MTDHETGHTSEAM sEcnol.r DETATL
24'ACCESIIFORT
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SEAMCIP
r Compliont with CSA ond IAPMO Stondordsr lnsuloted lids ovoiloble
e Moximum buriol depth is 48-r Minimum buriol depth is 6"e Tonk is not roted for vehiculor troffic
LIFIINGSIRAP
GYPTCAT)
El{D VtEl'V
loodingo Exterior of monhole cover includes the
following worning: 'DANGER DO NoT
ENTER: POISON GASES"ffir,**1**'
tit n'illrG
Digglng Specs lnvert Dimensions Net
Woight
Net
fsf Oomp.otol
16' Long x 7' Mde
43" below inlet
lnlet Outlet Length wdth Height
47"44"175.6"61.7"54.5"501 lbs.10OG 9ol 503 gol 1509 9ol
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Phono: 719€e5{704
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lnflltrator@ TankItffir tIt loco.i2@
tz7 Top
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AGCEsAFffT Ssctsr
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r Compllont with CSA ond IAPMO Stondordso lnsuloted lids ovoiloble
r Moximum burSol depth is 48"
r Minimum buriol depth is 6"r Tonk is not roted for vehiculor troffic loodingr Exterior of monhole cover includes the following
worning: "DANGER DO NOT ENTER: POISON
GASES"
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EXTEROR
HEIOHT
8Eil(IP
flrtcAD
LFIUFgrilP
0r"rc^l)
End
Mew
Digging Specs lnvert Dimensions Net Weight
ffirr,rr5ilgn'
rt*ntwrG
Copocity
2' Long x 7' Wide lnlet
+7"
Outlet
44"
Length
127"1094 gol 320 lbs
Phone: t19€0C{?04
Fac 719€05€'fZl
$fsEclb: rvruw.vdeypmmt@rn
EndlBucrs Vltte, Colondo
PRECASIIrnc.
Double Walled PVC Rlser & Lld Optlona
Poly Lid
($tatic load bsbd b 5(Xt0 bo). Skid msisfiance surhceo Avallable in grcen. Hlgheet levelof UV Pt$cfron indudod. lnduda a fuam gasket br alrtght and
wabrtght applications. lndudes squam drlve scrgws b disccruragp
unauhodzed erilry. lnsulaton panels acfiieve R-tO inndaton ratng
2"ot
Standard
Orenco o DunaFiberu Amss Lids (FLD)
i'lot recommerded br vehlcular ffic
2{ aN30'Diamebls. Solid, rceln-infused fibergfss mnsfucilion. 20,flX1{b breaking sfr€ngh. Stardatd grcen or brown oololg. Available wffir orwliltout urcfiane lid gmket. AvallaUe wih cafton frlffion. 4 steinless sbd f,athead socketcap scr€lrs & hel(
keyurrcncfro lnsulatsd lids avallaHe -t q 4'
:
2f of lnsulalionDouble Walled PVC Riser
. AvailaHe ln24i and 30' Diam$r. Cutb lsrgfrt. Sold in +h t lrrcrsnents. Mugt bo cut betrueen dbs
Phonc: fl9€96ff0a
Fm 719€0$07?/
W&lb: rYrw.trdbyplffi.om
EmlhBucre Vbtq Colorado
ffi1Ine.
Effiuent Flltenrttrln I
FT
BlOhtbe0 Junlor Efllucnt Fllbr
BlotubdJunbr Ellluent Filtatg arc h{eal brsmall€r
frons or urhere seilc tank hebht lim!ffionr plwent
the uee of our full-oEe frfror. Eacfi filtsr comee
compHe wlfi Bbtub€O fi]br cartldgB, P\/C ltoslng,
and exbndablo WC handle.
4'Ilamder
18'ln L€ng0l
FlltorAr€a ln CarflQp: 2.4 sq. fi.
Blotube0 Efnucnt Fllbtr
Blofrrb$ effiuent frlbtt arc uscd ln new or odsdrq
tanks, furboft rasldenfral and commeldal
appllcafone. Each filter omee wlth a Blotubo0llltor
cartldge (ln 4 and 8 in. dlam$p), WC horslng,
and exbndarble WC handlo. Opfrmd ahrm b
slgnal a bnk hhlrlevel @ndlflqt, u,l{ch may lndicab
a nead b deanfiefrlter.
4" DhrffirorS'Dlarffir
36'in Longfi
FtiorArsa ln CailidgB:
4ln. = 5.2 sq. fr.
8 in. = 14.9sq. ft
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Example
of Tank
lnstallation
EflttantFl]tlco So[ds grcetsrttran /o'mmein h tank. GafiSgoeel$ytumovedanddsned
- drply hoce dlwfienovsrtho tlnk
needrpumphgo GdonrstsedanHablebrlaqeflow
applloatlons (12 atd 15 h.)o ExtsnddraffioHHbbyptsvenfng
solds liun lewhg fie eep$c bnlro Conmlorrpodooncfrucdonbemute
long [bo Llfoltnemmanty
Avarrmrp- hetbnf chag
NOTlO
SCAIE
qttp
EIryeidboufanhr
Phonc: 7{9€Sia?0f
Fu: 719.ffi€1?/
Webslb: wuw.rdlrypr€etornffi:Bucne Vlrte, Golorado
PRtCAStlhc.