HomeMy WebLinkAboutOWTS Report 06.19.17MOUNTåIN CROSS
ENGINEERING. INE.
Civil and Environmental Consulting and Design
June 19,2017
Red Barn Guest Ranch
C/O Mr. Larry Halonen
26432 F,l Mar Drive
Mission Viejo, CA9269l
RE: Red Barn Guest Ranch,345 Mid Valley Lane, Newcastle, CO - OWTS Report
DearLarry:
The purpose of this correspondence is to inform you about the onsite wastewater treatment system
(OV/TS) designed for the Red Barn Guest Ranch. The project proposes to construct a reception
center for events serving up to 300 people. The project is located in Peach Valley, to the east of
Silt and to the west of New Castle, at 345 Mid Valley Lane. This will be a gravity system from
the events center to a conventional septic tank where a siphon doses to a leach field comprised of
infiltration chambers. The event center will be served by well water. The OWTS is not within the
1O0-year flood plain boundary. There are practical constraints that you should be aware of when
considering the proper design, construction, and operation of the OWTS.
Subsurface
The LTAR value was approximated as 0.60 gallons per day per square foot (GPD/sq.ft.) from soil
evaluations as a sandy loam, silt loam and also from percolation test results performed by this
office on June 14,2017. These percolation tests results yield a value of 24.7 minutes per inch. An
8' deep profile hole was excavated and an inspection revealed that no bedrock or high groundwater
table is within the leaching area.
Desisn Calculations
The water use is based on a flow rate of 5 gallons per person per day. Using Garfield County
Table 6-2,this equates 1,500 gallons per day (GPD) total. The design calculations for sizing of
the septic system and the leach field follow:
. Red Barn Guest Ranch: 300 Person Capacity * 5 GPD per person : 1,500 GPD
o Based on soil evaluation and percolation tests results, LTAR: 0.60
. Minimum absorption area: 1,500 GPD / 0.60:2,500 sq. ft.
o Reduction in soil treatment areas for chamber/trench treatment with dosing
:2,500 sq. ft. * 0.7 * 0.9 :1,575 sq.ft leach area
o Required chambers : (1,575 sq.ft)l(12.34 sq.ff/chamber): 127 .6 chambers, Use seven rows of 19 chambers, 133 chambers
¡ Required septic tank volume:2,000 gallons per Garfield County Table 9-1
S26lzGrand Avenue, Glenwood Springs, CO 8'1601
P: 970.945.5544 F : 97O.945.5558 www.mountaincross-eng.com
Red Barn Guest Ranch
Jwe,2017
Page 2 of3
The components manufacturers are typical for the area. Alternatives may be considered by
contacting this office. Construction must be in accordance with the specifications of Garfield
County Environmental Health, the OWTS permit, and this design.
Topsoil should be placed over the OWTS and planted with native grassss. No large vegetation
and/or plants with taproots should be planted over the absorption area nor grasses that require
excessive irrigation.
Setbacks
The location for the septic and dosing tanks are limited by setback requirements per Garfield
County and the State of Colorado. These include:
o 50' FROM WELL
o l0' FROM WATER SUPPLY LINE
. 5' FROM BUILDING
¡ l0' FROM PROPERTY LINE
o IO, FROM LINED DITCH OR STREAM
. 50'FROM STREAM
o 5o FROM LEACH FIELD
The leach fielcl setback reqnirements are:
o 140' FROM WELL
o 25'FROM WATER SUPPLY LINE
o 20'FROM BUILDING
o l0' FROM PROPERTY LINE
o 10, FROM LINED DITCH OR STREAM
¡ 90, FROM UNLINED DITCH OR STREAM
. 5,FROM SEPTIC TANK
The setback requirements deal primarily with buildings and potential contamination from the
septic tank, dosing tank, and leach field to either culinary water or surface water. These setbacks
have been included on the plans for reference.
There is a proposed pond that will need to be either lined or the shape of the pond modified to
conform to the required setbacks. Additionally, the Ware and Hinds ditch is an unlined ditch. The
leach field will need to be located out of the required setback distance.
Operation Information and Maintenance
The Owner will need to be responsible for the operation and management of the OWTS. Geo-
fabrics or plastics should not be used over the absorption area. No heavy equipment, parking of
machinery, or materials should be placed on the absorption area. Livestock should not graze on
the absorption area. Plumbing fixtures should be checked to ensure that no additional water is
Mountain Cross Enqineerinq. lnc.
Civil and Environmental Consulting and Design
8261/zGrand Avenue, Glenwood Springs, CO 81601
P: 970.945.554/. F: 970.945.5558 www.mountaincross-eng.com
Red Barn Guest Ranch
Jme,2017
Page 3 of3
being discharged to OWTS; for example, running toilets or leaky faucets can discharge hundreds
of gallons of water a day and harm the absorption area.
Garbage disposal use should be minimized, and non-biodegradable materials should not be placed
into the OWTS. Grease should not be placed in drains and grease traps should be installed
upstream of the septic tank but downstream from any kitchen. Loading from a water softener
should not be discharged into the OWTS. No hazardous wastes should be directed into the OWTS.
The OWTS is engineered for domestic waste only.
The Owner will likely need to contract with a septic system cleaner to clean the septic tank every
two years, or as needed gauged by measurement of solids in the tank. The standards of
performance for the septic system cleaner are recommended to be the following, at a minimum:
1. The Systems Cleaner shall be licensed.
2. The Systems Cleaner, when cleaning a septic tank, shall remove the liquid, sludge, and
scum, leaving no more than three (3) inches depth of sewage in a septic tank.
3. The Systems Cleaner shall maintain his equipment so as to ensure that no spillage of
sewage will occur during transportation, and that its employees are not subject to undue
health hazards.
4. The Systems Cleaner shall dispose of the collected sewage only at a designated site
recognized by the Board of Health.
Construction Observation
Prior to being backfilled, the construction of the OWTS and all of the components will need to be
observed by representatives of Mountain Cross Engineering, Inc.
The conclusions and opinions that are expressed above are based on the information available at
the time of preparation of this report. Any additional information presented afterward may require
that these opinions and the design be modified.
Thank you for the opportunity to provide this report. Feel free to call if you have any questions,
concerns, or comments.
Sincerely,
Mountain Cross Engineering, Inc.
Chris Hale, PE
Mountain Cross Enqineerinq. lnc.
Civil and Environmental Consulting and Design
8261/Grand Avenue, Glenwood Springs, CO 81601
P: 970.945.5544 F : 97O.945.5558 www.mountaincross-eng.com
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Tãck Shed
PASTURE-2
Existing Fence (typ.)
PASTURE-3140' WELL
Ex. Well
I
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EXISTING DRIVËWAY
fack Shêd
I
86.F
NEW PARKTNG AREA (109 SPACES)
Exist'g Grass Surface
Ex¡st'g Lawn
ând Spr¡ng
:.1.
COUNTY ROAD 214
Tack Sh€d
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PASTTJRE.l
Exist'g Rear Access Dr¡ve
PASTT}R8.4
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MAIN
GUEST
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SMALL STABLE
WARE & HINDS ÐITCH
ÊXIST'G GARAGT TO BE
CoNVERTED TO WEDDTNq HALL
New
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SITE PLAN:
MAIN STABLE
HAY BARN
GUESÏ HOUSE.2
SEPTC
DIS'IRIBUfION
NFW POND
SEPNC & DOSING TANK
SElBACKS:
-
POND IO AE IINEO
N 87'
Fzf,o(J
TANK,
DETAILS
BOX, SEE OEIAILS
50'FROM $,EtI
IO' FROM WA'IER SUPPLY LINE
5'FROM BUII.OING
10' FROM PROPERTY UNE
50'FROM SÌREAM
5'FROM L.EACH FIELD LAWN
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CLEANOUT AND'IIE fO 4: PVC
SEWER PIPE FOR E\€NÎ CENÍËR
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CH I..EACH FIELO, SÊE DETAILS
BARN I
EVENTS
LEACH FIEI."D SEIBACKS:
1,lO FRoM 'ÆLI25' FROM WAIER SUPPLY UNE
20,FRÕM EUII.OING
10' FROM PROPERTY UNE
10'FROM UNED DITCH
90.FROM UNUNEO DIICH, PONO OR SIREAM
5,FROM SEP'NC TANK $
SCALEtu250tu
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Callbefore you dig,
s 87'48', 14'DÍCh lS UNLINEo: BCH
FIELO TO BE SflBACK 90'
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CONCRM MANHOTE RISERS
NEEDEO (MNÀ)4-INCH SOR]5 PVC StrER AT
MrN. 1/4'PER FOOI SLOPE (m)
NOIES:
1. EXCAVAE NENCHES TO PROPER HDil, AND PROPER DEPff AS
REÒUINEO 8Y SÍÀIE AND LÒCAL CODES,
2. SOOfr IRREGULARIÏES IN ffE EXCAVAÏON. A EWL ruAT
SURFACE IS NECESSARY
3. AEEEMBU EIODIFU8ER LEACHINC CHAMBERS AND UNIWR5AL
ENOPUTES IOGEfrER rN nENCH(ES).
4. BE UNIWRSAL END PUE IS CONSNUCTED UT TAAS SO
TAT ilE EARil NLL ON ONE SIDE ULL HOLD IT SECURELY
IN PLACE AGAINST BE AIODIFruSER.
5. PUNCH OUT PIPE HOLE OPENINGS IN ilE END PLAES AS
NEEDED ANO CONNECT INLET PIPES,
6. FLL SIDEWAI AREA TO TOP CHNBERS HT NANW SOIL <2 1/2.
7. 'WALK IN' FÌLL IO COMPACI SOIL ALONC SIÞES OF CHAMBER.BIS IS WRY IHPORTANT TO ACHIEW FUI EIGHT RAINC.
A. COWR CHAMSERS IO A MINIMUM OF 12" AffiR CONSOUDATON
FOR H_10 APPUCATONS ANO 18- MINIMUM COWR AMR
CONSOUDATON FOR H_20 APPLICAIONS. AVOID URGE ROCKS
OR DEBRIS IN COWR MAERIAL. A ÆLL GRADED, CRUSHED
CRAWL AND CAREruL CilPACNON IS RECOMMENDED FOR H_20
INSÍALLAIONS.
PRÚPÚ5EÚ
FINI DING
cffow
ñLER V MDLE
FLEXIBLE COUPLING12'MrN.€" M^X.
___sElÐE (l4¡lq_Ð INSPEMON POtr
INSPECION PORT
4-INCH SDR35 PVC SSER AT
LæH RED CHAMBERYffiM, SEE DÍAIß
MrN. r /4" PER FOOI SLOPE (m)OOSING fNK
V SIPHON IN
PRECSWHO[
4't x ô' ruL
OWTS PROFILE
36'
OWTS DESIGN CALCULATIONS SECTION A_A
BRASS OR CASÍ IRON
CAP AND COER
VENÍED MANHOLE COVER
6" ÀBOVE FINISHED GRADE
OR FLUSH WITH PÀVEDRED &RN GUEÍ NCH: DESIGN FLOW PER NFELD COUñ lÆLE 6-2 - 1.500 gpd
sDY LoN, slLT LoÆ LIAR = 0.60. PERCoUIoN ilTE vERlflED AI 2+.7 ñii.lî.
MTNTMUM ssoRPnoN ffiü = 1,500 qpd / 0.6 - 2.500 sq,ft.
UsE LruH FELD Æa = 2,500 sq.ft. wffi A 0.7 ND 0.9 REDUCTIoN (FoR cuMBERs
ND DOSING RESPEqWLY) - 2,500 sq.ft. 1 O.7 ' O.9 = 1.575 3q. lt. ASSUMED BCHÆ4
ÆSUMED CWBERS - (1,575 3q.tt.)/(12Ja sq.ft.,/chombcr) = 127.6 chombÉrs,sMN Rors 0F 19 CHfrBERS = 133 chomb.ß
REOUIRED SEnC TNK VOLUME = 2.000 spd PER GßflEU COUNÌ TÆE 9-1
PROUDE ADEOUAE
SUPPffif FOR PIPE BEFORE
AND DURING EACKFILLING
FRAME ANÞ LID
CONCRETE RISER
CONCREE
SUPPORT
RINGS AS ECCENTRIC CONE
OR CONCRETE LID4_INCH SOLID WC PIPE AÍ 2Z
ilIN, SLOPE MOU DOSING TNK
4" SÐR35 PVC SEWER @ 2.02
MIN. FROM SEPTIC TANK
DtsfRBnoN 8ox v WFLE:ru IMffi OW TO BE AT
IDENTIru EWAÏONS
ÏBE IMRT IN TO BE
6' ÆOW rNVEm ouf
ENCASE M IN INVERT IN TO BE ABOVE
SIPHON OPERAIION LEVELS.
PER MANUFACTURER'S
RECOMMENDATION.
CLEANOUT DETAIL 4'OIA. CONCRETE
MANHOLE, WATERÍIGHT
OR APPROVED EOUALNot to Scolo
CONSTRUCTION SPECIFICATIONS
1. Topsoil Eholl b. 3kípp.d, dockpíl.d ond réploc.d ov.r oll
dlslurb6d 01608. Exi8t¡nq kGo ond snrubo sholl r6mo¡n unló!8
othoßisô opprov€d by th6 Ow¡6r; €x¡.t¡ôq wE.tolion lhcll notb. diduÈ.d brynd th€ noc.ssory l¡n¡t6 of lhs coÉìrudion.
2. Àl disturbod or6.s 3holl b. r6v€9.tot€d by th6 O*n.i
5. Thè 6il. shotl b. grod.d 3o thot runof w6t.r do6 not
droin onto th€ l6och li.ld 3udoco.4. Coñ3truct¡on Bholl co¡fom to Coñíold Couñty Rôgulat¡o¡3.
5. Chrìs Hol6, Mountoin CrGB Ên9¡n6árín9, l.c. sh.ll b6
not¡ri6d of th. coßtructio¡ progrcBs 30 th6 syst.m m.y bo
irupsctod. Do not bocHll ov€r oñy ryd€m compononts until
th6y hovo b.ð¡ iñsFcl6d.
6. S6w.r p¡p¡¡g sholl b6 boddèd o¡d inillolly b.cH¡ll.d eith
q.nv.l 4 inchái xnd.r piFiq rñd fi ìnchai on lop ol plping.
B.cklill sholl b. rh€€l-roll conÞoct.d. P¡pìnq sholl b!
insto¡l€d wot.dfght ond to prtânt t€oz¡ng.
7. fté *pìic tonk sholl b6 pr€cost concr€t€, B.t lry.l on o
hrd ñf Crñv.l lnlñll ìhi tnnr iñ ...ôdrn.6 r¡th th6
monuf octurer'3 rêcoñm.ndotìons,
8. fto sôptic tônk côpocity must b¡ ot re$t the s¡26
9. Th! slptic t nk ¡nld ñ$t b6 ot l.oEt J ¡ñcbos n¡gh..
tho. th6 outl.t. Æ inlet t6! or boílè mßt €*ðnd obd6 th€
sùlocá of thc l¡quid to rithin 1 lnch of the bottom of th.
tonl top ðnd must sdend ot leæt 14 ¡nch$ b6lô, th€ ln¡6t.
lo. A fittêr ¡3 r.quk6d o. th! linol outl.t tæ or ot 3om6
pôiñt bltwé6n thé s€pt¡c tont ohd obloet¡o¡ l¡.ld 3o thot
only th! l¡quld cflluent Ìill be d¡schoru.d, qhor outld te6s
or bolflcs must .xtend obovè the sudocê ol thc liqu¡d to
rith¡ñ ons incn of ths und€ßid6 ôl thê tont toP. Ts mßt
éxtónd ot l.od 14 irch.s Þôlôr th6 oüll.t.
11. ft€ distonc€ í.om th6 sopt¡c tont outl.t to th6 undeßid€
of thc tonk top FUst bs dl lêo* 10 ¡ncncs.
12. üquid dspth mßt bè ol láıst JO ¡nch6s oñd müst not
6xc€€d th. 8.ptic toñk l6n9th or 60 inch.E, ,h¡ch.v6r i. l@3.
13. A B€ptic tonk mud hov! two or hore compodm!.b (or
morð thon on6 tdnk ¡n s€rì$ lo providê lh6 n€cüBory
copoc¡ty). ftê fiBt .ohpodh6nt must b6 ot lôo.t 6 lorgô
o. tho s.coñd compodm€ñt.
14. fr. Uonsl6r of liqu¡d írom lhe fiEt compôdmênt to th.
second or succ.æ¡vê compodñent must bê ñod¿ ot ô liquìd
d€pth of ot lêost 14 ìnchss below th€ oullot inv6d, but not
in th. 3ludgé zon.,
15. At lôost on. .cc$s no læB thon 20 iñchos ocross ñud
be prcv¡dcd in eoch compodment ot q toñk.
16. Th€ op€ning covsr of o sspt¡c tonk, ¡ßp6ct¡on pod, or
sompl¡ng occ.B5 pod mGt b. mod.d ond must b6 no
moro thon I iñch$ bolow ìhå f¡nþhod grod.. lt mßt b.
modo of motorìols rG¡utqnl to dågrodot¡on lrcm moì3turc or
5
FLUID DYNAMIC SIPHON,
MODEL 4I7 INSTALLED PER
4" SDR35 PVC
SEWER @ 2% MIN
TO DISRIAUTION BOX
4_INCH SOLID M PIPES ÁT
2.02 MtN. sLoPE Ofr TO
MANUFACÍURER'S
RECOMMENDATIONS
SMN ROÆ OF INFILÍMTORS REMOWABE
SET SIPHON SUMP IN
CONCRETE PER
MANUFAC'TURER'S
RECOMMENDATIONS
SET THE MANHOLE LEVEL ON A GRAVEL BASE
DISTRIBUTION BOX
Not to Scolc 4" SOLID PIPÊ
-
VËNT HÚLES DOSING TANK _ ELEVATION,f r MrN.
FROM DOSING TNK
DISTRIBNiON BOX
Nôt to Scole
AOS CHAMBER
AIR VtrNT Á/ lNSPtrlîTlôN Wtrl I ntrTAll
Not to Scol6
ryc sDR35
O 2U MIN. SLOPE
95'
A
A AtR WM & INSPECION WELL
NSTru VO CWBER POffiS
oNE ON ACH END OF ROW (frP)
6, ff UNDISruRBED EARil BEMEN NENCB WALLS
17.JOJ4 prop€ily 7 ROWS OF 19 LrcHING
CHAMBERS 60"X34.5'X1J"
ilCH ROW ìNSAUD Lil€LA
compotibl6 pip€, bondiñg og.¡t, ond ffttings. ft6 follorirg
moy b. us6d: plGtic p¡p. ond lün93 e¡th d m¡nimuñ roll
thictn$s of ñM Stondord J0J4, SDRJ5, or €quivol€nt,
Þ€dorot6d disldbulion p¡ps suround€d by rock rithin o soil
dboryt¡ôñ ryBtêm w¡th o minímum roll th¡cknæs conform¡ng
to ñH Stoñdord 2729i o. cotrugoLd Polyôthyl.nô PiP6 v¡th
3ñooth ¡nt€dor mætlng ffi Fæ5 qnd Æ[O M252
Bp€cifrcot¡ono or equivolsñt. ï16, op6n-joiñt pipâ, ord cost
iroñ p¡p6 moy .ot b. uB.d ¡ñ Orc's.
19. Al compon6¡16, ro*. €quipm€nt. oñd mot6dol ñu3t b6
dcsigncd, operol€d ond hointoined so 03 to comply with thc
miniñum rêqufcmcñts ol the opplicoble ond cur.nt
Plumbing, El.ctdcol, Bu¡ldi¡g or olh6r cod6 i¡ forc6 or tho
dol. of th6 OffiS P6mit Applicotioñ.
20. Mojor compononb not conÉtrud€d on th. 8it. whoro
instoll.d must hove o permon€ñt plot. or othêr indeliblc
moû¡ng, eo3¡ly r€od ond vislbls, lor tho puryos€ of
¡Np6ct¡on, to ìnclud€ rom6 of ñonufaduE., mod€l or 36dol
ñumbôr d8ìgnotlon, ond ñoximum dðs¡En ctpdcìty ol tho
un¡t.
21. Grûv.l .h6ll bo clcon, sc.ccñcd tock V t6 2-yr' iî 3iL.
22. Tonk, tâôtm€nt unìts, ond pipíng motoriol mßt b.
*ot€díght o.d mBt b. c6dìfiod by lhe wol.r Ouolit, Coñkot
D¡vilion of th6 Colorcdo D€podms¡t of PuÈl¡c H6olth o.d
EnvÌonmônt, U¡de. cedo¡n cLcumdonc€s, thé D.podm.nt
ñoy rêqulo th. tonk bc fill.d sith woter pdor to bdcH¡ll to
ch6ck for l€ob.
2J. ñ. g.ound ov.r ony pod ol tho OW muot ba rootdotod
to oci¡vity or 6€ thot rlll ollor thé 3yd6m to funct¡on os
d.siEnêd ond thol *¡ll îot co¡lñbute lo cohpoct¡on of th6
sðll ór to thé Btucturor locdlñg dóùlm6ñLðl to lhÉ copoblllty
of th. coñpon.nt to funct¡o¡ ot d.!igñ.d. o.¡v6*6ys.
porkiñg .r6G, slo.og€ buildin$. lorgs oó¡ñol êonr¡ñ.m.¡t
or.os ond other slmllor usès moy ôot bê ploc.d on or obovc
oñ oW disposol ficld.
24. Môchin. tompíng, .olling, or hydroulic coñpoctlon of finol
covôr is not p.rmi(!d, hoe.v.., hond loñping moy b€
ollorad wh6¡6 .6cqBory to stobilízs lh. loìl to prd.nt
erosion or tho lntrus¡on of 6dron€ôus yot6r.
25. Sìphon to bo modðl 4JO by Flrid Dynomic Síphon8, l¡c.
,EoO.EE6.5ı3 or opprovod 6quol. lndoll prr hodulôctur..'s
A
6' OF UNDISruRBED EARB AETffiEN MENCH WALLS
A
A
LEACH FIELD SYSTEM
SEPTIC TANK,
SIZE PERPW SHEÚS
fI
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I
o
o
T
3'
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o
Not to Scole
6, OF UNDISruREED EARff BEMEN NENCH WAL6
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REDBARN
264-005
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