HomeMy WebLinkAbout1919 Cedar Dr - 246704304001EAGLE 7UNTY DEPARTMENT OF ENVIRONMf,_ --tiTAL HEALTH
Box 811 6th & Broadway
Eagle, Colorado 81631
PERMIT a 45 (this does not constitute
• a building or use permit)
Owner JEROME OSENTOWSKI
System Location Tract 44, Section 4 & 5, T8S, Range 86 - Basalt Mountain
Licensed Contractor . Self q1 �el&r N_
* Conditional Construction approval is hereby granted for a 1000 gallon
x Septic Tank or Aerated treatment unit. NOTE: Lost on property.
Call for final inspection.
Absorption area (or dispersal area) computed as follows:
Perc rate 1 inches in 30 minutes 600 sq. ft.
absorption area per bedroom 200 sq. ft.
# of bedrooms 3 x 200 sq. ft. minimum requirement
May we suggest a minimum of 600 sq. ft. leach fi61d. OR a 10' x 10' x 10'
dry well. f' ,
Date a„e»st 14, 1975 Inspector (�(J
Erik W. Edeen, R.P.
FINAL APPROVAL OF SYSTEM:
No system shall be deemed to be in compliance with the Sewage Disposal Laws until the assembled system
is approved prior to covering any part.
Septic Tank cleanout to within 12" of final grade or aer
Proper materials and assembly.
Adequate absorption (or dispersal) area.
Adequate compliance with permit requirements.
Adequate compliance with County and State lations/re
Date f a J 25 v 7_ Inspector
access ports above grade.
RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE
* CONDITIONS:
1. All .installation must comply with all requirements of the County Individual Sewage Disposal Regulations,
adopted pursuant to authority granted in 25-10-104, CRS 1973 amended 25-1-614, CRS 1973
2. This permit is valid only for connection to structures which have fully complied with County Zoning and
building requirements. Connection to or use with any dwelling or structures not approved by the building
and Zoning office shall automatically be a violation of a requirement of the permit and cause for both
legal action and revocation of the permit.
3. Section III, 3.24 requires any person who constructs, alters, or installs an individual sewage. disposal
system in a manner which involves a knowing and material variation from the terms or specifications con-
tained in the application of permit commits a Class I, Petty Offense ($500.00 fine - 6 months in jail or
both.
ENVIRONMENTAL HEALTF.
P.O. BOX 811
PERMIT NO. EAGLE, COLORADO 81631 PERMIT FEE $25.00
APPLICATIONN
FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT Q 166
c�,
Y Name of Owner: V_ 0 IV-, <, - l 1 '!� 6 E ►-L—T 0 i��' � � � Phone: �(L jv e-lv
Address of Owner: 8 K 39 6 2_ � , P, Z ) G % r
Is facility within boundaries of a city/town or sanitation district? v
Distance to nearest sewer system: 2 + � ,e S
Location of Proposed System:_l
IN Pik e 1 0 -F
Legal Discription: e-- S �1 Zt '-,
T a
Type of Structure: Single Family Dwelling ( ) Other: No. Bed1-1 rooms— I y �^� i3e d ►, v 0 -i
Water Supply: Private Well ( s) Lo at on: � � ����' Distance From leach field: a ,A,'40ve_
Size of Lot: 6 1. b Fl er -e-S . Public Water Supply: O
PP Y�
An appropriate plat plan must accompany site inspection for this application showing required information. (See
attached sheet.) The individual sewage disposal system will be constructed and installed in accordance with the
regulations governing individual sewage systems within Eagle County, and shall comply with House Bill 1553 CRS
66-14, 1973. Payment shall be made to the Eagle County Treasurer. Permit, upon approval of this application, may be
obtained at the Eagle County sanitarian's office.
Appointment for final inspection must be made prior to construction by contacting the inspecting sanitarian. [Phone
328-7718 between 8:30 and 9:00 AM.] Refer to permit number. No approval will be given on any system without final
inspection.
Name, address, and telephone of person responsible for design of system: 0 L-" 1'-k t Y
The undersigned acknowledge that the above information is true and that false information will invalidate the
application or subsequent p r iY.
SIGNATURE OF APPLICANT: Date:__ U i
(This application becomes invalid 6 months from above date.)
HEALTH DEPARTMENT USE ONLY
�4a �,z- c7 7 �a
Percolation Information: Permit No. �P
Tank Capacity: ® al. (minimum) Fee Receipt:
Absorption Area:— xsS70 Sq. ft. (minimum) File:
Gz /a x to >1(i Oaf- kve�i
REMARKS:
APPLICATION IS: APPROVED
DENIED ( )
The above individual sewage disposal system was installed by
AND HAS BEEN INSPECTED AND APPROVED BY A REPRESENTATIVE OF THE EAGLE COUNTY HEALTH DEPT.
Date: Sanitarian:
LE
•7 r' •7'+!� i• sir.• 11 -• •f ' f� SITE
T: T'TC r 7/� T / 1` L•...+ • li
l.ES' AUD SI E L�. :� j�J IO�'i F- v0 n /
PE;?' -IT i`l7••�^-�`\.�,�1-�%✓') �� y P r
'�� v a Ci iri L� 1 t-, ) 'f <:.: { Ti
Street Address or LeG,-il Description: 'idovov"C:=/Y7
Tj?. E O L'.�^ll _i1:: ( o "�t� \•-k'l l 3r L °=7 �' t�✓'�1. PiT-. :� of
Cii 00•=:::: �� t
DO I OT 13 :I T, a"LCi ` T T?S LINE
Date of Test. %— 7V�� Depth of hole:Diw,,leter: Typ of
_ � / _/�lJ yf, soiI
Location of Test Role:
Test hole was presoaked from: To:
(Tine) (Date) (Time) Date
T TP.'r.
1 i.r�i..- ;Fi>•D { H
--
IiT1: *'C 9T,T.
...: car r_ .
T.]
tt
1 2
3
1
2
3
g
N 1
2
3
1.
3
Z'
06
2-10�
1
a3
L2
12'
► .
!
C
Percolation Rate: ld 2''I n/o
Site has been reviewed and tested for percolation rate.
We rer_oi-nend: A21P2,0VIkL ( I3ISiiP.P1:017AL ( ) Date:
NOTE: Plot plan s`to:•:in- 1)oundary lines, lOC2tion of proposed building or builcliilC,s
and deli-n of septic syst(-,^i must be submitted with Apt lication for perms-t t0 COt.$tYLCt.
The back of this form may be used to silos) plot an and cest-n of system•
By.
Sanitarian
P. 0•
Telephone (303) 3%8-7710 rtiCo a
a ^
r.aole, Colorado z,1631
06/30/92 14:35 $ 3039273467 EPSRLT PRINTING P.02
Jere Hiduskey and Ghc-r l a Carlton
777 CC-tdar Drive
13ar:alt, CO 131F,21
June 30, i 992
Joe aricd Cuter I a,
To addros . yr:,ur concorr;4 rdL,c,i+t the sef,tiC system an my property, 1
have done t ho f c,l l owi r;g .
1. Regarding tF-Q lwcatifrr Of tl',e dry well, I have probed with 51 rrds
and have determi nLe d that thLs dry wey11 is "cot located on your prctporty.
2. I cal l0d ar, Eag) e Co4ar,t.y 11tti ldi ng 111uPe17tOr and Ray Merry,
Eagle County head 5arri t,aris{n - 1,tzey informed me tF•,at, when the Syt,tcm
was, installed there were? no scAback rerduirement�. the dry well system
On my property is riot in vi c:rl at i can c+f Eagl E? County taui 1 fii rig c;r sarii tar y
cOdc-S_ Since the tank il:, Over 1 , a40 feat f roff, your wpl 1 r and showF, no
signs Of t.rc_ir,g cipfec-tive, Ray Mc,rry saw ncr Ptrciblem witF'r thw current
system.
Jwst as 9r�4161:21-a1 !it 1 .rrr1&tirrs' l would like to (liittic�
hir,tory abnrjt the tare: e-wirl t�VPt:ii :4y5t.edve You a 1 t. TF,r� t,arlk and City itl
syst&fl1 was insi.eAllErcl i.r, 1975 a,trl i,asa fUl-Actir_rr,t=d Without failurfa to
this paint. 5;i><; yec-ir: ct,4U, fcrr cjE,i,era] fr,tAintenance I,urpoSE-,, the E+Ealrti c tank: wa-,; punip4: d. At. t. i rne, it st; i l l WAS riot full. I Ftavti
maintained a very ticlltt mairit4;rnarice schodule cif t6',e-y5t@*m ; bact:E'ri�c
to aid in rJi eJristi c-,, of matcrr i ail. 3 s, added every six frionths. Signs arc
persted in both t.cr inform users that n' toilet Paper, sanitary
nQPk:i Mi, or anything el ,e c•f thi „htar.rre i.c, t.ZP be fluahed. All toi let
paper i:; Collected in a contctir,Ef� r'E'r_EpLr1�]& to beberrrred on a ra-clLrIaY
basic, i n a wood t,ur i,.i ny s..i;crv4.. I da rrcrt have= a wut.xhi riy machine and
use water saving (IE? v' c. V L; c+n .? ). l i ar..rr_ et s arid shower hEiad s . No g ar t,agc,
dispersal is used and all S;it�:Ftf�r, W"',tE• i--1 fed to the chid, -ens. 'ft•Zesr_}
practices have L+een prr_•rvE,r, tK� e_>:tr-!rr�1 the I i fe of �;ny :erti c system.
Regarding the c0r1( rr i, You hove- for the civerl,oad of the syste
ofm,
in terms, Of the number cif pec,F,le u:>inF4 it., there F;ave been an avtrragE
f four pecyhlE• to ai r,y i t. U�': ri yE�t,r-rUur,tl ba;ri s for the last seven years.
This Apr 5 n9r for fnontFr: , there wE,r a 10 pecrp7 a heir, but there are now
1r_vt,r1 and several arc. plt-ir,r,inc. trl It-ave at the enrl of August;, 1832.
.�'CrtnF' Lrf thE'SH pF.'+ rpl c ar u not al 4,ri:ys jr, r E'i-.]. derIC F�- . Thi v1 should not tjt!
(onsideare:d an overload fo), meat i or,ed above. ea 1,C1pC1 t(soi tarsi; given thefrraeticPw
1)"r3ny the:' r]c.'yt Pc-rn,ack.rl-LLir•4• lic•sig„ lretI c�c.crsf? tr. tat held in l.atr� c�bE'r, �Cr- tl p[�trpl E will t,4� in r E,.idt-ncc' for P weei-ra. I willr c'nt i ng a pc�r't ahl a toilet t�ef yin adds-d prc:c, aL t i ran. be
1 dsl.bCr had. clirscr.,5�-ic,r'jE wilt, r.ay Mc�r-ry rF�4ardiriq ttiP xnstall,ri,ic,n
4_'F A legal +cowl;-rti toilet ;mid c!rt,yw�ktt.7r system. Flans; are �ir,al ),Fit
t.rs Piave #Irfys systems i n oporai i c.wi thi 1, a short i:i frtF-. Wi t.h tF• v
nr crywatHr system i-ir,cl c-c,mllu;,t tcr3 .11
i in c pE?r Eit i On, tliE i; X1 St i nr1 hr,i,t. i r
..yC:.teni will have uti.rria,�il. uirE•.
06/30/92 14134 2t 3039273467 BASALT PRINTING P.01
LL I , V,-\ -4, *1-*VK
Na"=.- "—ijevt . L"-Nam� K 0�\
Fax #—.J0J-9g-?7-34f67 Fax # '
Phone call Basalt PrInfing.
Phone # - D� :L at 303/927.4705
Tlkf- bariols of jili-Ai.c.,yi
the I-sc-1 e has, bet?,, a' "'or" Ll-lc-� Pit tr-d3i.-A hlvu, bE-ppl, re(nove(.1 a,-jcj
Orr -a. I Y 'F-f' 13 " with mvilcl-i and dirt fron, t['ju! rtty-ye--unding
plave PIZAI-Itt--d m p1tin Lreur ill the fi jjH(j 1-1
RceWardlog thf- qrAr(a ,CJ
j US*.t L)"c)w thEl tPuice) i no tf-,A has
:� F- 'r r e hi bepsi removed and
With carpet: tO c t
.4 r ea qF th a P t AS the-,- area has been Y F'iPF!-dc -d wj t h rye i-And clovery mujcIjE?d
WAL-red to tielp in V&gf_ttijt,QFj. , attid will be
I hoptv t1ijtj ajjFwc-.,yS, jt1l Yf YOU I-j;LjVt, any
r;rill Pay Murry, I-leac; far Lagjr nty at
Dox 179, Fap).F.-Y N'l LA
ter (-I y t
1 A ov
40 �L- V. - e It 0 W I s; It% J.
091 rudar Drive
P0 Box 631
L30--..a I t ca 8
cc: Ray Mprry# E-:qje County Hpacj Ui4,Tsi.t&rid;Fi
Jim Hunt Dr afid TRI'vry Gw3inr-Ai4, neic lhhoy-
PERSONCALLED:
DATE: (o�Bn
TIME: :P'30 Q,vm.
ACTION:
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csap oat sc .�.�,�u�t NOiLTN of 1
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�i sPrr�ni� 1, GERARt:D H. PESMAN , CERTI FY THAT THIS PLAT
1� ml c1TT=ram cc?f1M Ftc*i n NnTFc,- ew & NAonTr t%wnpSQ
.
0045-Tract 44
Sec 4&5
T8S Range 86
JOB NAIV—
0091 E. Cedar
Drive
Osentowski
lle72"_111
r0
BILL TO
DATE STARTED
DATE COMPLETED
DATE BILLED
L111 741 V&
— ,2 1
PERMIT # 45 C Gyut p
OWNER: Jerome Osentowski
LOCATION: Tract 44 - Section 4 & 5, T8S, Range 86
Basalt Mountain (8.6 acres)
INSTALLER: Owner
SIZE OF TANK: 1,000 gallons
DWELLING: Single family - 3 bedrooms x 200 sq.ft. = 600 sq.ft.
PERC RATE: one inch/30 minutes (600 sq.ft.)
(suggest a minimum of 600 sq.ft. leach field, or a 10' x 10' x
10' dry well)
Finalized 10-23-75 By: Erik Edeen
L �, -fc
JOB COST SUMMARY
TOTAL SELLING PRICE
TOTAL MATERIAL
TOTAL LABOR
INSURANCE
SALES TAX
MISC. COSTS
TOTAL JOB COST
GROSS PROFIT
LESS OVERHEAD COSTS
% OF SELLING PRICE
NET PROFIT
JOB FOLDER Product 277 @ NEW E4IGLAND BUSINESS SERVICE, INC., GROTON, MASS. 01471 JOB FOLDER Printed In U.S.A.
Inspection Result
Eagle County, Colorado
P.O. Box 179 500 Broadway Eagle, CO
Phone: (970) 328-8730 Fax: (970) 328-7185
IVR Phone: 1-866-701-3307
Inspection Number: Basalt - 1919 Cedar -
525989
Permit Number: OWTS-016127-2019
Inspection Date: 10/03/2023
Inspector:
Permit Type: OWTS Permit
Inspection Type: OWTS Final Inspection
Work Classification: NewOwner:Central Rocky Mountain Permaculture
Insitute
Job Address:1919 Cedar DR IVR Pin Number:187618
Basalt, CO 81621 Project:<NONE>
Parcel Number:246704300007
Contractor:Phone: (970) 945-2851 / Cell: (970) 379-5737Walters Company, Inc
Inspection Status: Approved
Inspection Notes
Inspector Comments
Added Item: Septic Tank
A 1,250 gallon two compartment septic tank (item #1250T-2CP-HH), with an Orenco PF300511 high
head pump and pump assembly, and effluent filter in the outlet tee of the third compartment was
installed.
Added Item: Record Drawing
Received 9/29/2023 from Sopris Engineering.
Added Item: Record Photos
Received 10/3/2023.
Added Item: Site and Soil
Received 3/19/2019.
Added Item: Final Certification Letter
Received 9/29/2023 from Sopris Engineering.
Added Item: General Plan
Received 3/19/2019.
Added Item: Soil Treatment Area (STA)
The STA consists of a 8' by 47' bed equipped two rows of 11 Infiltrator Quick4 Plus Standard
chambers set atop two feet of secondary sand media, for a total of 22 chambers.
Tuesday, October 3, 2023
For more information visit: http://www.eaglecounty.us
Page 1 of 2
Added Item: Identification of Systems Contractor
Walters Company Inc was the licensed installer.
Tuesday, October 3, 2023
For more information visit: http://www.eaglecounty.us
Page 2 of 2
Claire Lewandowski <claire.lewandowski@eaglecounty.us>
Inconsistencies for 1919 Cedar Dr- OWTS Design
3 messages
Claire Lewandowski <claire.lewandowski@eaglecounty.us>Fri, Apr 5, 2019 at 4:20 PM
To: paulr@sopriseng.com, ynichol@sopriseng.com
Cc: environment@eaglecounty.us
Hi,
I am reviewing the OWTS design for 1919 Cedar Dr, and there a re a few inconsistencies that must be addressed including the following:
First, the design calls for 300 sqft of STA, then calls for 36 chambers, then calls for 2 rows of 8 chambers (16 chambers total), the site plan also shows only 16 chambers in a 38'x8' bed. By my calculations, a
300 square foot STA bed would require 25 chambers minimum (12' per chamber).
\
Second, The notes call for an effluent filter on the outlet tee, but the design calls for the pump to be install in a biotube vault, are both even feasible in one compartment?
Third, the distribution notes call for a three-compartment tank, but the specs and design call for a two-compartment tank.
Fourth, I don't see where on the design the recommendations are for dose volume and/or frequency, and the float settings.
Last, I just wanted to point out that with the final certification, and sand gradation analysis that was completed within 30 days of purchase must be provided that meets the requirements for "preferred sand". If
preferred sand can not be located, a redesign will be required for secondary sand using a 0.80 LTAR.
I will make a note in the file that the design was sent back for revisions and the permit review due date will be updated according to when those revisions are received.
Please don't hesitate to reach out if you have any questions.
Thank you,
Claire
--
Claire Lewandowski, REHS
Environmental Health Specialist III
970-328-8747
www.eaglecounty.us
Mail Delivery Subsystem <mailer-daemon@googlemail.com>Fri, Apr 5, 2019 at 4:20 PM
To: claire.lewandowski@eaglecounty.us
Address not found
Your message wasn't delivered to paulr@sopriseng.com
because the address couldn't be found, or is unable to receive
mail.
The response from the remote server was:
550 5.1.1 <paulr@sopriseng.com>: Recipient address rejected: sopriseng.com
Final-Recipient: rfc822; paulr@sopriseng.com
Action: failed
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Remote-MTA: dns; mail.sopriseng.com. (50.235.37.196, the server for the domain sopriseng.com.)
Diagnostic-Code: smtp; 550 5.1.1 <paulr@sopriseng.com>: Recipient address rejected: sopriseng.com
Last-Attempt-Date: Fri, 05 Apr 2019 15:20:47 -0700 (PDT)
---------- Forwarded message ----------
From: Claire Lewandowski <claire.lewandowski@eaglecounty.us>
To: paulr@sopriseng.com, ynichol@sopriseng.com
Cc: environment@eaglecounty.us
Bcc:
Date: Fri, 5 Apr 2019 16:20:27 -0600
Subject: Inconsistencies for 1919 Cedar Dr- OWTS Design
Hi,
I am reviewing the OWTS design for 1919 Cedar Dr, and there a re a few inconsistencies that must be addressed including the following:
First, the design calls for 300 sqft of STA, then calls for 36 chambers, then calls for 2 rows of 8 chambers (16 chambers total), the site plan also shows only 16 chambers in a 38'x8' bed. By my calculations, a
300 square foot STA bed would require 25 chambers minimum (12' per chamber).
image.png\
Second, The notes call for an effluent filter on the outlet tee, but the design calls for the pump to be install in a biotube vault, are both even feasible in one compartment?
image.png
Third, the distribution notes call for a three-compartment tank, but the specs and design call for a two-compartment tank.
image.png
Fourth, I don't see where on the design the recommendations are for dose volume and/or frequency, and the float settings.
Last, I just wanted to point out that with the final certification, and sand gradation analysis that was completed within 30 days of purchase must be provided that meets the requirements for "preferred sand". If
preferred sand can not be located, a redesign will be required for secondary sand using a 0.80 LTAR.
I will make a note in the file that the design was sent back for revisions and the permit review due date will be updated according to when those revisions are received.
Please don't hesitate to reach out if you have any questions.
Thank you,
Claire
--
<div dir="ltr" class="gmail_signature" data-smartmail----- Message truncated -----
Claire Lewandowski <claire.lewandowski@eaglecounty.us>Fri, Apr 5, 2019 at 4:24 PM
To: Paul Rutledge <prutledge@sopriseng.com>, YNICHOL@sopriseng.com
Cc: environment@eaglecounty.us
Paul, I had the wrong email for you, please see the below email.
Thanks
[Quoted text hidden]
April 10, 2019
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704 -0311 • Fax (970) 704 -0313
S OPRIS E NGINEERING • LLC civil consultants
Jerome Osentowski
Colorado Rocky Mountain Permaculture Institute (CRMPI)
Po Box 631
Basalt, Co 81621-0631
"Jerome Osentowski" <Jerome@crmpi.org>
RE: Revised Design Site Engineering Report, On-site Wastewater Treatment System (OWTS), CRMPI,
Dwelling Unit, 1919 Cedar Drive, Parcel 1 & 2, Basalt, Eagle County, CO
SE Job No. 18192, Parcel No: 2467-043-00-007.
Dear Jerome:
This letter report presents the applicable findings in regard to the design and construction of an Onsite
Wastewater Treatment System (OWTS) and residential site improvements at the above referenced Site, in
support of your building permit application to Eagle County. The proposed improvements include minor
grading and drainage, OWTS, existing driveway upgrades and propane gas service to serve the Existing
historic cabin addition dwelling unit shown on the Site Plan prepared by SE in coordination with the
property owner.
The OWTS design is based on our evaluation of the site conditions with information provided by others for
use in obtaining an Eagle County OWTS construction permit. We have evaluated the existing and
proposed site conditions with respect to the operation and installation of a new OWTS in accordance with
the latest Eagle County OWTS Regulations and State of Colorado Regulation 43. The proposed site
specific improvements have been designed in accordance with County Regulations and general engineering
guidelines regarding grading, drainage, utilities and construction best management practices. Based on the
physical site features, soils, and existing building layout, we have prepared civil site and OWTS design
plans with construction details for building permit approval. The design and construction recommendations
with specifications are delineated on the civil design plans, C1-Site Plan C1 - Survey Information.
C2 - Driveway P & P & Fire Truck Vehicular Access, C3 - Site, Utility, Grading, Drainage Plan, dated 12-07-2018
and C4 - Onsite Wastewater Treatment System Plan, Revised dated 04-10-2019, by Sopris Engineering.
Existing & Proposed Site Conditions
The site is located at 1919 Cedar Drive, Basalt, on Parcels 1 & 2 being a part of Tract 44, in Section: 4
Township: 8 Range: 86, Bk-0218, Pg-0214 WD, and Bk-0239, Pg-0954 WD, Eagle County, Colorado. The
existing site improvements include: a historic cabin, with attached greenhouse an attached 200 S.F. dwelling
addition currently under construction, existing access driveway, and native landscape features. The proposed site
improvements include: minor grading around the 200 S.F. dwelling addition to the cabin, installation of an OWTS
to serve the 1 bedroom cabin, minor upgrades to the existing access driveway with respect to emergency vehicle
access/maneuverability and minor utilities improvements. The total Parcel 1 & 2 site comprises 8.4 acres. The
subject development envelope on Parcel 2 and the northern portion of Parcel 1 comprises approximately 0.5 acres
and is accessed from Cedar drive from the North, approximately 1.6 miles northeast of the Town of Basalt.
The site is situated on a mountainous ridge in a pinion/Juniper forested terrain with variable slope grades of 3% to
16%. The existing driveway from Cedar Drive follows a 30’ wide access easement along on the western boundary
of Tract 44 to the northerly corner of Parcel 2 and continues South down gradient to the improved building site on
Revised OWTS Design and Construction Report
CRMPI Accessory Building Unit
SE Job No. 18192.01
April 10, 2019
Page 2
Parcel 1. The site vegetation consists of cedar, juniper and juniper trees with a variety of grasses, and scattered
shrubs. Meadowlands exist down gradient to the west of the broad ridge. The site dwelling is served by an existing
developed spring and water distribution system. Propane gas service will be installed. No phone, cable or electric
service will be installed. The Cabin and addition utilize solar for electric needs.
Grading and Drainage
On site improvements include very limited grading primarily associated with specific driveway upgrades
and minor excavation with backfill associated with the OWTS and building construction. Best
management practices will be utilized to manage onsite drainage that will include maintenance of driveway
drainage swale and natural native landscaped areas. The existing site has vegetated areas, over very porous
southern exposed terrain. The existing conditions provide for natural storm water attenuation with
infiltration. The proposed site will be landscaped to improve the existing vegetation conditions to provide
continued attenuation and management of onsite drainage. Appropriate best management practices will be
installed and utilized during construction and maintained as needed until minor disturbed areas are
stabilized and/or recovered with established vegetation.
OWTS Design Criteria and Sizing
Based on our findings the design and installation of an engineered OWTS with enhanced treatment is feasible in
accordance with applicable County and the State of Colorado Regulation 43. The building improvements will
include a small 1-bedroom dwelling with a single full bath, without a kitchen to be served by the new OWTS
system. The system is designed based on the current County design criteria and the design criteria approved for the
use of a pressure dosed sand filter (SF) system. The design is in compliance with the current County Regulation
No. 43 with area calculations based on the LTAR loading rate for secondary sand media (ASTM-C33 concrete
sand) per a minimum equivalent 2-bedroom design flow capacity.
Design recommendations include the installation of a 1,250 gallon 2-compartment concrete septic tank that will be
equipped with an Orenco Systems simplex high head pump in a Biotube vault installed in the secondary chamber
with associated piping and controls. We recommend the use of a full pressure dosed Sand Filter (SF) system to
provide good secondary treatment performance in the relatively rocky soils. The SF field will consist of a single bed
installed to provide for equal pressure distribution of effluent across a 375 S.F. treatment/absorption SF field with
24-inches of sand media, distribution laterals and gravelless chamber spray shield units. The effluent will be dosed
across the two distribution rows via individual custom perforated pressure distribution pipe running the length of
the 47 feet by 8 feet sand filter bed.
OWTS Design Flow Calculations:
Installation of an OWTS with a minimum 2-bedroom capacity.
From County adopted State Regulation 43:
Minimum population based on 2 bedrooms = 4 persons.
Gallons per day per person =75 gal/person/day, No peaking factor
Max. Design flow (Qd)gallons/day = (# of people) x (avg. flow)gal/person/day.
Design flow Qd = 6*75=450 gpd
Septic Tank Design: 450 gpd x 2 days = 900 gallons detention required plus 250 gal for dosing = 1,150 gal. Use a
1,250 gallon, two compartment septic tank with a bio-tube dosing assembly in the second chamber.
Revised OWTS Design and Construction Report
CRMPI Accessory Building Unit
SE Job No. 18192.01
April 10, 2019
Page 3
Sub Surface Conditions and Testing
Subsurface soil investigations and USDA soil texture method tests were performed by Sopris Engineering. The soils
in the area of the proposed absorption field were sampled and characterized by application of the USDA soil texture
method test. The soils were tested to determine the hydraulic loading rate and to confirm the appropriate absorptive
surface level suitable for an intermittent sand filter treatment system in native soils. The soils below nil to 3 inches
of topsoil consist of medium dense gravelly sandy loam material to 1.5 to 6 feet below the surface. The soil appears
to be consistent across the site.
The native soils sampled from 2-3 feet below the surface are characterized as a soil type 2 consisting of sandy silt
loam texture with moderate granular structure. This soil has an effective loading rate for conventional soil treatment
of 0.6 Gal/S.F./day for a level 1 conventional treatment system. Due to limited area and to provide optimal
treatment an intermittent sand filter is recommended to provide for a treatment level TL3 system (43.11.C.2.a.) No
free water was encountered in excavations on site. Groundwater levels are expected to be below 10 feet from the
existing surface grades. The soils are suitable for the installation of the sand filter treatment bed system consisting
of a minimum 24" depth of sand Media that will be fully pressure dosed meeting the Requirements under sections
(43.10.E.3.a & 43.11.C.b.c.d.1&d.3).
An additional soil evaluation will be performed during construction to verify the soils in the actual field excavation.
Intermittent Sand Filter Treatment Unit/ Absorption System Design:
The treatment/absorption field is designed based on utilizing the effective Long Term Acceptance Rate (LTAR) for
an intermittent sand filter treatment system utilizing pressure dosed distribution laterals and gravelless chamber
units as "spray shields". The new treatment system will consist of a fully pressure dosed sand filter Treatment bed
System with a 24-inch layer of secondary filter sand (ASTM-C33, "Concrete sand"), in accordance with section
(43.11.C.d.1&d.3).
Long Term Acceptance Rate (LTAR)
Considering the allowable application of the County OWTS regulation 43:
Receiving septic tank effluent, the treatment level for intermittent sand filters is considered TL3 for the minimum
24" depth of treatment media with the upper infiltrative surface being at least 3-feet above a limiting layer
(43.11.A.3.c);
Maximum hydraulic loading rate for TL1 effluent applied to “Secondary Sand Media” in an unlined sand filter is
0.8 gal./sq.ft./day, or the long term acceptance rate of the receiving soil Type 2 for TL3 (1.1 gal./S.F./day) (Table
10-1) whichever results in the larger area (43.11.A.3.b.(2).
The maximum Loading rate is therefore 0.8 gal./sq.ft./day
Loading factors; (Table 10-2, pressure dosed application bed = 1.0 )
A(sf) = Qd .: A = Area;
LTAR LTAR = 0.8 Gal/S.F./day for secondary sand media
ASTM-C33, "Concrete sand"
Qd = flow (gal/day) = 300 gpd
L.F.1=1.0 pressure dosing
A(sf) = 300 gpd x 1.0 = 375 S.F.
0.8 Gal/S.F./day
Revised OWTS Design and Construction Report
CRMPI Accessory Building Unit
SE Job No. 18192.01
April 10, 2019
Page 4
Excavate the the 47.0' by 8' bed to a minimum 3.0 depth below finish grade. Scarify surface and backfill with 24-
inches of ASTM-C33, "Concrete sand". Install 2 runs of custom perforated distribution laterals on top of sand
media and cover with 22 Quick-4 chambers in 2 rows with 11 chamber units per row for use as pressure dose spray
shields, as delineated on the plan. The bed will be dosed from the simplex high head distribution pump system
installed in the second compartment of the septic tank.
The standard Quick 4 chamber spray shields shall be installed over the top of the sand on 4-foot centers and
backfilled with a minimum 12-inch depth of cover. Filter fabric shall be placed over the chambers and the entire
extents of the sand filter bed. The slightly mounded field shall be constructed with final surface grading at a
minimum 6-inches above the up gradient surface grades with a minimum 3-inch topsoil layer placed over the field
surface.
The chamber rows shall be completed with standard end caps installed at both ends. A piezometer monitoring well
pipe riser with threaded cap will be installed near a corner of the field and be extended down to the excavated
surface depth at the bottom of the placed sand.
Effluent Distribution System
The OWTS field shall be fully pressure dosed along the entire length of the distribution rows. An Orenco Systems
Bio Tube pump vault system will be installed with an effluent cartridge filter in the second compartment of the
septic tank. The pump system shall incorporate a single high head pump. The simplex pump assembly will demand
dose effluent through a single 1.25-inch diameter PVC transport pipe from the pump assembly and connect to
manifold pipe that connects to the two custom perforated pipes at the head of the bed. The 1.25” discharge
transport pipe shall be installed with a minimum 2.5% continuous slope to allow for drainage of the pipe.
The effluent will be equally pressure dosed through each 1.25-inch custom perforated distribution lateral running
the length of the treatment bed installed on top of the sand filter layer. The pipe will have 5/32-inch orifices drilled
every 2.0 feet oriented upward to spray against the interior chamber unit that will broadcast the effluent onto the
sand surface. The first and last orifice will be drilled and oriented downward with an orifice shield to allow
drainage of the line.
Individual 1.25” ball valves will be installed at the end of each perforated distribution lateral centered below one of
the pair of end cap vertical inspection port penetrations at the terminal end of the field. Two vertical 4-inch
inspection ports will be installed from the pair of end cap inspection port penetrations at the terminal end of the
field and one 4-inch inspection port will be installed from either end cap penetration at the head of the field. All
inspection ports shall extend a minimum 6-inches above the finish grade and be topped with a treaded cap.
Pump operations shall be controlled by a wall mounted exterior control panel in direct line of site with the tank.
Automatic float switches for on, off and high water with alarm activation shall be installed on a dedicated PVC float
tree. Two separate circuits from the electrical circuit panel and/or junction box shall be routed to the control panel
for separate power to the controls and pump. The control panel is equipped with time and cycle counters to allow
for future evaluation of the system and adjustments to dosing as needed.
The proposed dosing volume is sized to account for the daily flow and the dosing frequency based on 0.25-1.0
gallons/orifice/dose or 3-5 times the distribution pipe volume. The minimum target dose cycles per day is 4.
Revised OWTS Design and Construction Report
CRMPI Accessory Building Unit
SE Job No. 18192.01
April 10, 2019
Page 5
The dosing cycles, volumes and pump float s settings have been calculated based on an adjusted Daily flow as
summarized in the table below.
OWTS DEMAND DOSING CALCULATIONS
CYCLE, VOLUME AND PUMP FLOAT SETTINGS
DESIGN FLOW Q 300 GPD
ADJUSTMENT FACTOR 0.5
METERED OR ASSUMED Q 150 GPD
TARGET DOSING CYCLES/DAY 4 DOSES/D
DOSE VOLUME /CYCLE 37.5 GAL
DISTRIBUTION LATERAL PIPES VOL 6.8 GAL
DOSE VOL / LATERAL PIPES VOL 5.5 TIMES
TRANSPORT PIPE VOLUME 1.9 GAL
SUM TOTAL DOSE VOL/CYCLE 39.4 GAL
DOSING COMPARTMENT STAGE VOL 9.2 GAL/IN
ON/OFF FLOAT SPREAD SETTING 4.3 IN
DESIGN PUMP DISCHARGE RATE 22.3 GPM
PUMP RUN TIME 1.8 MIN
FLOW RATE PER ORIFICE 0.48 GPM
GAL/ORIFICE/DOSE 0.85 GAL
Construction and Inspections
Prior to construction of the permitted system, the engineer should be contacted by the contractor and construction
project manager well in advance to provide adequate time to discuss the system components with the contractor,
answer questions, resolve any conflict issues and schedule inspection site visits based on construction progress. A
pre-OWTS construction meeting and calls are essential and required prior to installation of the OWTS.
The engineer, prior to excavation shall inspect the staked location, of the proposed treatment/absorption bed and
tank. All septic system components shall be staked in the field for approval by the Engineer prior to excavation.
During initial construction the engineer will evaluate the soils in the location of the absorption treatment field to
confirm design assumptions made and existing conditions. The engineer will provide construction recommendations
and make adjustments to the field layout and sizing if needed with discussion of construction procedures.
As necessary a revised Construction document drawing will be submitted to the County as needed if changes are
required. All installations shall be inspected, surveyed, documented and reported/delineated in the Certification
letter and As-built drawing.
County Regulations require that the Design Engineer of record perform site inspections of the permitted system
during construction and provide “As-Built” documentation of the installed system to the County after construction
is complete. Photo documentation during construction and site system inspections is required to be performed by
the contractor and Engineer. System component installation inspection and review of photo documentation is
required of the exposed system components prior to backfilling. Photo documentation will be included with the As-
Built Record drawing submittal package to finalize the OWTS permit. Therefore the Engineer should be contacted
as needed and notified of the construction progress and scheduling to allow time to schedule specific inspection
times.
Revised OWTS Design and Construction Report
CRMPI Accessory Building Unit
SE Job No. 18192.01
April 10, 2019
Page 6
OWTS Operation and Maintenance
All components of the engineered OWTS shall be inspected on a regular basis and be properly maintained. The
responsibility for repair and maintenance of the system will remain with the property Owner. The owner shall
retain the services of qualified personnel to inspect the OWTS and to perform all maintenance and repairs necessary
to ensure that the system is in good operating condition and is in compliance with the manufacturer’s performance
requirements. The operating components of the OWTS shall be inspected by the engineer within 30 days of being
placed into operation and thereafter every six months by the owner or qualified service provider. In general, for a
properly utilized system, septic tanks should be pumped every 3 - 5 years. The effluent filter should be cleaned
every six months and at the time of pumping. Absorption fields should be maintained with suitable vegetative cover
and kept free of root invasive plants. Positive surface drainage away from the absorption field should be
maintained.
If you have any question or need any additional information, please call.
Sincerely,
SOPRIS ENGINEERING, LLC
Paul E. Rutledge Yancy Nichol, PE
Design Engineer Principal
SSSSSSSSSSSSSSSS SSSSSS SSSS SSSS SSSS SS8.0'37.5'0.5'1.0'FFE: 7345.8±PROPOSED1-BEDROOMDWELLINGEXISTINGGREENHOUSEEXISTINGHISTORICLOG CABIN2-WAY CLEAN OUT4" GRAVITY SEWER PIPEINSTALL @ 2%INSTALL 2-COMPARTMENT 1250-GALLON CONCRETE SEPTIC TANK(VALLEY PRECAST ITEM # 1250t-2CP-HH)INSTALL WITH (2) 24" DIA. BY 24" DEEP RIBBED PVC RISERS W/ LIDS AT THESURFACE. INSTALL ORENCO SIMPLEX EFFLUENT PUMP ASSEMBLY.(PVU57-1819-L) W/P300511 PUMP), W/ 1.25" DISCHARGE ASSEMBLIES.DEPTH TO TOP OF TANK FROM PROPOSED GRADE IS APPROX. 2'.INSTALL UNDERGROUND ELECTRICALAND CONTROL WIRES IN CONDUIT WITHINSEWER PIPE TRENCH.PROVIDE WIRES FOR PUMPS AND CONTROLSELECTRICIAN CONFIRM WIRE GAUGE SIZE WITHPUMP SUPPLIER & COORDINATE WITH INSTALLER.INSTALL 4" RISER PIPE INSPECTION PORT ATEACH END CHAMBER (TYP.)1.25" FLUSH BALL VALVE ON END OF EACHDISTRIBUTION LATERAL.INSTALL ASSEMBLY BELOW EACH INSPECTIONPORT (TYP. END EA. ROW)RECOMMENDED LOCATION OF CONTROL BOXINSTALL PUMP CONTROL BOX IN LINE OF SITEELECTRICIAN TO PROVIDE CIRCUITS AND WIRES FORPUMPS & CONTROLS TO CONTROL PANEL.ELECTRICIAN TO COORDINATE W/ INSTALLER1.25" PRESSURIZEDMANIFOLD PIPE.PRESSURE DOSE TRANSPORT PIPE. USE 1.25 SCHD-40W/ 24" MIN. DEPTH OF BURY. BED PIPE W/ CL-6ROAD BASE. INSTALL AT MIN. 2.5% TO ALLOW DRAINBACK TO TANK.1 1/4" PVC SCHD-40 CUSTOM PERFORATED PIPE DISTRIBUTION LATERALS. DRILL 3/16-INCHDIA. ORIFICES EVERY 2.0-FEET ALONG THE PIPE & PLACE ON THE TOP OF THE ABSORPTIVESAND SURFACE. USE WIRE STAPLES TO SECURE PRESSURE PIPE TO SAND SURFACE.ORIENT ORIFICES BETWEEN THE FIRST AND LAST TO SPRAY UPWARD (12 O'CLOCK) AGAINSTINTERIOR OF CHAMBERS. DRILL FIRST AND LAST 3/16" ORIFICES ORIENTED DOWNWARD ATBOTH ENDS OF DISTRIBUTION LATERAL TO ALLOW DRAINAGE OF OUT OF PIPE.ABSORPTION/TREATMENT FIELD W/ PRESSURE DOSED BEDUSE USE 16 QUICK-4 IN 2ROWS WITH 8 CHAMBERS PER ROW FOR A TOTAL ABSORPTIONAREA OF 300 S.F. THE CHAMBERS SHALL BE INSTALLED AT LEVEL GRADE. THE BOTTOMOF THE BED TO BE EXCAVATED TO MIN. DEPTH OF 4.0 FEET WITHIN THE NATIVEGRAVELY SANDY LOAM & BACKFILLED WITH A MINIMUM 36-INCH SAND FILTER LAYER.INSTALL WITH A MIN. 12" NATIVE BACKFILL COVER OVER TOP OF CHAMBERS. SEPTICFIELD FINISH SURFACE APPROX. 12" ABOVE ADJACENT GRADES.uetcuetc INSTALL CHAMBER END CAPON ALL END CHAMBERS735373527351
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±Know what'sbelow.before you dig.CallRG:\2018\18192\18192-DE ACCESS-3.DWG - Dec 10, 2018 - 9:03am NORTH1 inch = ft.( IN FEET )GRAPHIC SCALE010102010405TYPICAL YARD LANSCAPED SURFACEOR AGGREATE PAVED SURFACE6" MIN.4" MIN.4"N.T.S.4"TO 90% STANDARD PROCTORSUITABLE BACKFILL OR CLASS 6 ROAD BASEEXCAVATED MATERIAL COMPACTED4" SDR353" DIA 4" SCH404" SCH404" SDR353" DIA 1.25" SCHD-40 PVC PRESSURE MANIFOLD W/ INDIVIDUAL1.25" TEES OR ELBOWS TO 1.25" CUSTOM PERFORATEDDISTRIBUTION PIPECHAMBER END CAPCONNECT 1.25" TRANSPORT LINETO 1.25" PRESSURE MANIFOLD. TRANSPORT PIPE INVERT A MIN.2" HIGHER THAN INVERT OF MANIFOLD TEE CONNECTION. USE45°OR 22.5° FITTINGS.OWTS SYSTEM NOTES1.ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY ONSITEWASTEWATER TREATMENT SYSTEM (OWTS) REGULATIONS.2.IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL UTILITY COMPANIESFOR FIELD LOCATIONS OF UTILITIES PRIOR TO CONSTRUCTION AND EXCAVATION.3.ALL SEWER LINES TO BE SDR-35 BEDDED IN CLASS 6, SDR-26 BEDDED IN SCREENEDNATIVE OR SCHEDULE 40 P.V.C. PIPE BEDDED IN SCREENED NATIVE MATERIAL UNLESSNOTED OTHERWISE.4.INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE.5.THE CONTRACTOR SHALL ENSURE ALL SEWER LINES AND SEPTIC TANKS AREWATERTIGHT. ANY POTENTIAL PLUMBING LEAKS SHALL BE REPAIRED TO AVOIDEXCESSIVE WATER ENTERING THE SEPTIC SYSTEM.6.THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALLWATERTIGHT RISERS AS NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THEFINISHED SURFACE GRADE.7.A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OUTLET. INSTALLTHE INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTIONAND MAINTENANCE OF TANK FROM THE TANK RISERS.8.AN EFFLUENT FILTER IS REQUIRED. INSTALL A 4" EFFLUENT FILTER WITH THE TANKOUTLET SANITARY TEE OF THE SEPTIC TANK OR APPROPRIATE FILTER SYSTEM WITH ADISCHARGE PUMP ASSEMBLY. THE GRAVITY OR PUMP SYSTEM FILTER SHOULD BEINSPECTED EVERY SIX MONTHS. THE EFFLUENT FILTER SHALL BE MAINTAINED ANDCLEANED WHEN THE TANK IS PERIODICALLY PUMPED OR AS NECESSARY. INSTALL ASUITABLE EXTENSION ON THE FILTER WITH A HANDLE TO BE WITHIN 6" BELOW THEACCESS LID.9.THE TREATMENT BED MUST BE MARKED AND PROTECTED TO PREVENT DAMAGE FROMVEHICULAR AND LIVESTOCK TRAFFIC.10.THE ENTIRE TREATMENT BED SURFACE MUST BE SODDED OR RE-VEGETATED WITHGROUND COVER.11.THE TREATMENT BED SURFACE MUST BE CROWNED TO DIVERT SURFACE DRAINAGEAWAY FROM THE BED.12.THE DIMENSIONS SHOWN ON THE PLAN INDICATE MINIMUM AREA AND SEPARATIONDISTANCES FOR THE OWS COMPONENTS.13.THE BED SHALL BE LEVEL WITH DISTRIBUTION PIPES INSTALLED FOR EQUAL PRESSUREDISTRIBUTION.14.THE BED SHALL BE OVER EXCAVATED TO ALLOW PLACEMENT OF THE SPECIFIED SANDFILTER TREATMENT MEDIA LAYER. THE BOTTOM SURFACE AND SIDEWALLS OF THETRENCH TO BE SCARIFIED AND RAKED AS NECESSARY PRIOR TO PLACEMENT OF THELEVELING SAND.15.THE TREATMENT BED SHALL BE CONSTRUCTED WITH CHAMBER UNITS PLACED OVER THESPECIFIED SAND LAYER FOR USE AS SPRAY SHEILDS. THE CHAMBERS, SAND ANDDISTRIBUTION PIPES SHALL BE COVERED WITH FILTER FABRIC TO THE SIDES OF THEEXCAVATION.16.THE MINIMUM COVER OVER THE TOP OF THE CHAMBER SPRAY SHIELD UNITS SHALL BE12 INCHES NOT TO EXCEED 18".17.THE BED CHAMBERS WILL BE BACKFILLED TO THE SURFACE WITH EXCAVATED MATERIALVOID OF ROCKS. THE BACKFILL MATERIAL SHALL NOT EXCEED 3" DIAMETER. A MINIMUM4" DEPTH OF TOPSOIL IS TO BE PLACED ABOVE THE BACKFILL TO THE FINISH SURFACEGRADE.18.BALL VALVES (SIZE PER PLAN) SHALL BE INSTALLED ON THE TERMINAL ENDS OF THEPERFORATED DISTRIBUTION PIPE JUST BELOW THE 4" INSPECTION PORTS.19.ALL INSTALLATION OF THE CHAMBER UNITS SHALL BE IN CONFORMANCE WITH THEMANUFACTURES INSTALLATION INSTRUCTIONS.THE ABSORPTION FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES:10 feet from any property line.25 feet from any potable water supply line.20 feet from any occupied dwelling.100 feet from any well, spring or cistern.25 feet from drainage swale or ditchesDISTRIBUTION SYSTEM NOTES:1.EFFLUENT FROM THE SECONDARY SEPTIC TANK COMPARTMENT WILL FLOW TO THETHIRD COMPARTMENT THAT HAS A BIO TUBE DOSING BASIN WITH A SIMPLEX HIGHHEAD EFFLUENT PUMP ASSEMBLY. EFFLUENT WILL BE EQUALLY DISTRIBUTED TO THETREATMENT BED VIA THE SPECIFIED INDIVIDUAL TRANSPORT LINE TO THE PRESSUREMANIFOLD AT THE HEAD OF THE BED. (SEE PLAN CALLOUTS NOTES)2.THE SPECIFIED CUSTOM PERFORATED PRESSURE DISTRIBUTION LATERALS WILL BEINSTALLED BELOW THE CENTER OF THE SPRAY SHEILD CHAMBER ROWS ON THE SANDLAYER SURFACE. THE DISTRIBUTION PIPES WILL HAVE 3/16" ORIFICES DRILLED ASSPECIFIED AT EQUAL INCREMENTS ALONG THE PIPE. (SEE PLAN CALLOUTS)3.THE DISTRIBUTION SYSTEM SHALL DISTRIBUTE FLOW EVENLY ACROSS THE INTERMITTENTSAND FILTER BED. THE MINIMUM SLOPE OF THE TRANSPORT PIPE FROM THE DOSINGTANK TO THE PRESSURE MANIFOLD SHALL SHALL BE A MINIMUM 2.5% TO ALLOW FORDRAIN BACK. ALL DISTRIBUTION PIPING, CONNECTIONS AND FITTINGS SHALL BEWATERTIGHT AND INSTALLED TO INSURE EQUAL DISTRIBUTION THROUGH THE SYSTEM.TESTING, INSPECTIONS AND CONSTRUCTION MANAGEMENT1.ADDITIONAL INSPECTIONS AND RECOMMENDATION WILL BE MADE BY THE ENGINEERDURING CONSTRUCTION TO APPROVE THE LAYOUT OF THE TREATMENT FIELD SYSTEM,VERIFY INSTALLATION OF SPECIFIED MATERIALS AND OWTS COMPONENTS.2.PRIOR TO CONSTRUCTION OF THE PERMITTED SYSTEM THE ENGINEER SHOULD BECONTACTED BY THE PROJECT MANAGER/CONTRACTOR WELL IN ADVANCE TO PROVIDEADEQUATE TIME TO DISCUSS THE SYSTEM COMPONENTS WITH THE CONTRACTOR,ANSWER QUESTIONS, RESOLVE ANY CONFLICT ISSUES AND SCHEDULE INSPECTION SITEVISITS BASED ON CONSTRUCTION PROGRESS. A PRE-OWS CONSTRUCTION MEETING WITHTHE ENGINEER, THE CONTRACTOR, ELECTRICIAN AND THE QUALIFIED INSTALLER ISREQUIRED PRIOR TO INSTALLATION OF THE OWTS COMPONENTS.3.REGULATIONS REQUIRE THAT THE DESIGN ENGINEER OF RECORD PERFORM SITEINSPECTIONS OF THE PERMITTED SYSTEM DURING CONSTRUCTION AND PROVIDE"AS-BUILT" DOCUMENTATION OF THE INSTALLED SYSTEM TO THE THE COUNTY AFTERCONSTRUCTION IS COMPLETE. WE RECOMMEND THAT INSTALLED OWS COMPONENTS BESURVEYED TO OBTAIN REQUIRED AS-BUILT INFORMATION.4.CONTRACTOR SHOULD DISCUSS ISSUES REGARDING SPECIFICATIONS, INSTALLATION ANDOPERATION OF OWTS MECHANICAL SYSTEMS AND CONTROLS WITH THESUPPLIER/INSTALLER AND/OR THE ENGINEER.5.OUR DESIGN AND RECOMMENDATIONS ARE BASED UPON OUR EVALUATION OF THEEXISTING AND PROPOSED SITE CONDITIONS AND INFORMATION SUPPLIED TO US BYOTHERS. IF SITE CONDITIONS ARE FOUND TO BE DIFFERENT FROM CONDITIONSASSUMED OR INDICATED, WE SHOULD BE NOTIFIED TO EVALUATE ANY EFFECT ON THEPROPOSED OWTS.ELECTRICAL NOTES1.AN ORENCO SYSTEMS CONTROL PANEL SHALL BE INSTALLED BY A QUALIFIED INSTALLERIN COORDINATION WITH THE ELECTRICIAN. WE RECOMMEND 110 VOLT ELECTRICSERVICE BE PROVIDED TO THE PUMP. THE POWER SUPPLY FOR THE PUMPS ANDCONTROLS SHALL CONSIST OF (1) 20 AMP DOUBLE POLE CIRCUITS FOR THE PUMP AND10 AMP SINGLE POLE CIRCUITS FOR CONTROLS. PANELS TO BE INSTALLED IN LINE OFSITE WITH TANK AND OR PUMP BASINS.2.THE CONTRACTOR SHALL INSTALL ELECTRICAL SUPPLY WIRE IN CONDUIT FROM THESERVICE PANEL TO THE WALL MOUNTED CONTROL PANEL.3.THE SYSTEM QUALIFIED INSTALLER SHALL INSTALL ELECTRICAL DIRECT BURY WIRES ORWIRES IN CONDUIT FROM THE CONTROL PANEL(S) TO THE DISCHARGE PUMPASSEMBLY'S JUNCTION BOX ON THE RESPECTIVE RISERS OVER THE TANK OR BASINS.INSTALL CODED WIRES PER CONTROL PANEL DIAGRAM. INSTALL ALL WIRES FOR PUMPAND CONTROLS WITH CONDUIT SEAL NEAR SPLICE BOX. ELECTRICIAN TO COORDINATEW/ SYSTEM INSTALLER. INSTALLATION CONSULTATION BY VALLEY PRECAST, INC.Design Calculations OWTSInstallation of an OWTS with a minimum 2-bedroom capacity.From the State Regulation 43:Minimum population based on 2 bedrooms = 4 persons.Gallons per day per person =75 gal/person/day, No peaking factorMax. Design flow (Qd)gallons/day = (# of people) x (avg. flow)gal/person/day.Design flow Qd = 2*75=300 gpdSeptic Tank Design: Use a 1250 gallon, two compartment septic tank with a bio-tube dosingassembly in the second chamber.Sub Surface Conditions and Testing:Subsurface soil investigations and USDA soil texture method tests were performed by SoprisEngineering. The soils in the area of the proposed absorption field were sampled andcharacterized by application of the USDA soil texture method test. The soils were tested todetermine the hydraulic loading rate and to confirm the appropriate absorptive surface levelsuitable for an intermittent sand filter treatment system in native soils. The soils below nil to3 inches of topsoil consist of medium dense gravelly sandy loam material to 1.5 to 6 feetbelow the surface. The soil appears to be consistent across the site.The native soils sampled from 2-3 feet below the surface are characterized as a soil type 2consisting of sandy silt loam texture with moderate granular structure. This soil has aneffective loading rate for conventional soil treatment of 0.0.6 Gal/S.F./day for a level 1conventional treatment system. Due to limited area and to provide optimal treatment anintermittent sand filter is recommended. No free water was encountered in excavations onsite. Groundwater levels are expected to be below 10 feet from the existing surface grades.The soils are suitable for the installation of the sand filter treatment bed system that will befully pressure dosed..An additional soil evaluation will be performed during construction to verify the soils in theproposed field excavation.Intermittent Sand Filter Treatment Unit/ Absorption System Design:The treatment/absorption field is designed based on utilizing the effective Long TermAcceptance Rate (LTAR) for an intermittent sand filter treatment system utilizing pressuredosed distribution laterals and gravelless chamber units as spray shields.. The new treatmentsystem will consist of a fully pressure dosed sand filter Treatment bed System with a 36-inchlayer of filter sand (ASTM-33, "Concrete sand").Long Term Acceptance Rate (LTAR)Considering the application of the new state regulation 43:Receiving Wastewater Treatment Level 1; loading rate for sand filter is (1.0 gal./S.F./day) forthe minimum 36" depth of treatment media;Loading factors; (Table 10-2, pressure dosed application bed = 1.0 ) A(sf) = Qd .: A = Area; LTAR LTAR = 1.0 Gal/S.F./day for ASTM-33, "Concrete sand"Qd = flow (gal/day) = 300 gpdL.F.1=1.0 pressure dosing A(sf) = 300 gpd x 1.0 = 300 S.F. 1.0 Gal/S.F./dayExcavate the the 37.5' by 8' bed to a minimum 4.0 depth below finish grade. Scarify surfaceand backfill with 36-inches of ASTM-33, "Concrete sand"Install 2 runs of custom perforated distribution laterals on top of sand layer and cover with36 Quick-4 chambers in 2 rows with 8 chamber units per row for use as pressure dose sprayshields, as delineated on the plan. The bed will be dosed from the simplex high headdistribution pump system installed in the third compartment of the septic tank.GENERAL NOTES:1.THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRISENGINEERING.2.THE PROPOSED LOT CONDITIONS AND SURVEY INFORMATION BY SOPRIS ENGINEERING.3.PRIMARY OWNER NAME AND ADDRESS: OSENTOWSKI, JEROMEPO BOX 631, BASALT, CO 81621-06314.LEGAL SUMMARY QUARTER: TRACT: 44 SECTION: 4 TOWNSHIP: 8 RANGE: 86 BK-0218 PG-0214 WD , 07-06-70, BK-0239 PG-0954 WD 05-13-755.SITE ADDRESS: 1919 CEDAR DRIVE, BASALT, CO 816216.PARCEL NUMBER: 2467-043-00-0077.EAGLE COUNTY PERMIT #: ____________ ISSUED __________8.CONTRACTOR: ______________________________________________________INTERMITTENT SAND FILTER LAYER EFFECTIVE SIZE0.25-0.6 MM, WITH UNIFORM. COEF.=<4.0 USECONCRETE SAND-ASTM-33MACHINE COMPACT AND LEVEL TOP SURFACE'24"NOTE:THE INTERMITTENT SAND FILTER BED MUST BE LEVEL. INSTALL CHAMBERS WITH INLET ANDEND CAPS OVER SAND LAYERT FOR USE AS SPRAY SHEILDS. INSTALL INDIVIDUALDISTRIBUTION LATERALS TO THE HEAD OF EACH CHAMBER ROW FROM A MAINIFOLDCONNECTING EACH CHAMBER ROW. CUSTOM PERFORATED PIPE TO BE LAID ON TOP OFTHE SAND LAYER WITH ORIFICES ORIENTED UPWARD EXCEPT THE FIRST AND LAST ORIFICESTO BE ORIENTED DOWNWARD. INSTALL A 4" VERTICAL INSPECTION RISER FROM THEMOLDED END CAP CUT OUT ON THE LAST CHAMBER IN EACH ROW. INSTALL A BALL VALVEAT THE END OF THE DISTRIBUTION LINE ACCESSIBLE FROM THE INSPECTION PORT TOALLOW FLUSHING OF THE LINE. THE VALVE IS CLOSED FOR NORMAL OPERATION.8'-MIN.12" - 18"MIN. MAX. PRESSURE DISTRIBUTIONPIPE CONNECTED THROUGH END CAPTO CUSTOM PERFORATED DISTRIBUTIONLATERAL PIPENATIVE GRAVELLY LOAMY SAND SOILWITH COBBLESEXISTING GRADECUSTUME PERFORATED PRESSURE PIPE WITHORIFICES AT 12 O'CLOCK. SECURE PIPE WITHPUSH IN STAPLESSCARIFY/TILL BOTTOM SURFACE ANDEXCAVATION SIDE WALLSQUICK-4 INFILTRATOROR EQUAL BIO DIFFUSERSPRAY SHIELDSSCREENED BACKFILLNATIVE SOILUNDISTURBED EARTHCROWN FIELD TRENCH TODIVERT SURFACE WATER36"1.25" TEE CONNECTIONSEED AND MULCH FINISH SURFACEMAINTAIN SUITABLE VEGETATIVE COVER1.25" SCHD-40 PVCDISTRIBUTION MANIFOLDTOPSOILPRESSURE DOSED INTERMITTENT SAND FILTER SYSTEMWITH CHAMBER SPRAY SHEILDS0.5' (TYP.)1.0'(TYP.)OPRIS ES NGINEERING, LLC.
CIVIL CONSULTANTSJOB NO.SHEETDATE:NO.REVISION BY DATE
502 MAIN STREET
CARBONDALE, CO 81623
(970) 704-0311
FAX: (970)-704-0313
DESIGNED BY
DRAWN BY
CHECKED BY
DATEINITIALS
18192C-4G:\2018\18192\18192-DE ACCESS-2.DWGDEC 7, 2018OWTS PERMIT APPLICATION - BUILDING PERMIT APPLICATION
COLORADO ROCKY MOUNTAIN PERMACULTURE INSTITUTE
Tract 44 S4,T8,R86W, 1919 CEDAR DR, BASALT,
ONSITE WASTEWATER TREATMENT SYSTEM
8.0'
47.0'
0.5'
FFE: 7345.8±
PROPOSED
1-BEDROOM
DWELLING
EXISTING
GREENHOUSE
EXISTING
HISTORIC
LOG CABIN
2-WAY CLEAN OUT
4" GRAVITY SEWER PIPE
INSTALL @ 2%
INSTALL 2-COMPARTMENT 1250-GALLON CONCRETE SEPTIC TANK
(VALLEY PRECAST ITEM # 1250t-2CP-HH)
INSTALL WITH (2) 24" DIA. BY 24" DEEP RIBBED PVC RISERS W/ LIDS AT THE
SURFACE. INSTALL ORENCO SIMPLEX EFFLUENT PUMP ASSEMBLY.
(PVU57-1819-L) W/P300511 PUMP), W/ 1.25" DISCHARGE ASSEMBLIES.
DEPTH TO TOP OF TANK FROM PROPOSED GRADE IS APPROX. 2'.
TOP SEPTIC TANK EL.=7338±
TANK SEWER PIPE INVERT IN EL.=7337.25±
INSTALL UNDERGROUND ELECTRICAL
AND CONTROL WIRES IN CONDUIT WITHIN
SEWER PIPE TRENCH.
PROVIDE WIRES FOR PUMPS AND CONTROLS
ELECTRICIAN CONFIRM WIRE GAUGE SIZE WITH
PUMP SUPPLIER & COORDINATE WITH INSTALLER.
INSTALL 4" RISER PIPE INSPECTION PORT AT
EACH END CHAMBER (TYP.)
1.25" FLUSH BALL VALVE ON END OF EACH
DISTRIBUTION LATERAL.
INSTALL ASSEMBLY BELOW EACH INSPECTION
PORT (TYP. END EA. ROW)
RECOMMENDED LOCATION OF CONTROL BOX
INSTALL PUMP CONTROL BOX IN LINE OF SITE
ELECTRICIAN TO PROVIDE CIRCUITS AND WIRES FOR
PUMPS & CONTROLS TO CONTROL PANEL.
ELECTRICIAN TO COORDINATE W/ INSTALLER
1.25" PRESSURIZED
MANIFOLD PIPE.
PRESSURE DOSE TRANSPORT PIPE. USE 1.25 SCHD-40
W/ 24" MIN. DEPTH OF BURY. BED PIPE W/ CL-6
ROAD BASE. INSTALL AT MIN. 2.5% TO ALLOW DRAIN
BACK TO TANK.
1 1/4" PVC SCHD-40 CUSTOM PERFORATED PIPE DISTRIBUTION LATERALS. DRILL 3/16-INCH
DIA. ORIFICES EVERY 2.0-FEET ALONG THE PIPE & PLACE ON THE TOP OF THE ABSORPTIVE
SAND SURFACE. USE WIRE STAPLES TO SECURE PRESSURE PIPE TO SAND SURFACE.
ORIENT ORIFICES BETWEEN THE FIRST AND LAST TO SPRAY UPWARD (12 O'CLOCK) AGAINST
INTERIOR OF CHAMBERS. DRILL FIRST AND LAST 5/32" ORIFICES ORIENTED DOWNWARD AT
BOTH ENDS OF DISTRIBUTION LATERAL TO ALLOW DRAINAGE OF OUT OF PIPE.
ABSORPTION/TREATMENT FIELD W/ PRESSURE DOSED BED
USE 22 QUICK-4 CHAMBERS IN 2ROWS WITH 11 PER ROW FOR USE AS SPRAY SHEILDS
OVER A TOTAL SAND MEDIA INFILTRATIVE SURFACE AREA OF 375 S.F. THE SAND SHALL BE
INSTALLED AT LEVEL GRADE. THE BOTTOM OF THE BED TO BE EXCAVATED TO MIN. DEPTH
OF 3.0 FEET WITHIN THE NATIVE GRAVELY SANDY LOAM & BACKFILLED WITH A MINIMUM
24-INCH SAND FILTER LAYER. INSTALL WITH A MIN. 12" NATIVE BACKFILL COVER OVER
TOP OF CHAMBERS. SEPTIC FIELD FINISH SURFACE APPROX. 12" ABOVE ADJACENT GRADES.uetcuetcINSTALL CHAMBER END CAP
ON ALL END CHAMBERS 735373527351735073497348734773467345734473437342
7341
7340
735
1
735
07
3
4
9
7
3
4
8
73
4
6
7
3
4
7
7
3
45
7
3
44
FINISH
FLOOR
EL=7345.8±
FINISH
FLOOR
EL=7341.5±
CSF:7339.8±EG:7342.8±EG:7339.3±EG:
7
3
3
8
.
2
±EG:7342.0±EG:7338.2±AUTOCOURT
OWTS FEILD
W
L
SV
C
PARCEL 1
EG:7338.7±4.0'1.0'
BOTTOM EXCAVATION EL.=7338±
TOP SAND MEDIA SURFACEEL.+7340±
DISTRIBUTION LATERAL INV EL.+7340±
TOP SPRAY SHEILD CHAMBEREL.+7341±
MIN. FINISH GRADE EL.+7343±SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSKnow what's below.
before you dig.Call
R
G:\2018\18192\18192-DE ACCESS-3.DWG - Apr 10, 2019 - 4:00pmNORTH1 inch = ft.
( IN FEET )
GRAPHIC SCALE
010 10 20
10
405
TYPICAL YARD LANSCAPED SURFACE
OR AGGREATE PAVED SURFACE
6" MIN.
4" MIN.
4"
N.T.S.
4"
TO 90% STANDARD PROCTOR
SUITABLE BACKFILL OR CLASS 6 ROAD BASE
EXCAVATED MATERIAL COMPACTED
4" SDR35
3" DIA
4" SCH40
4" SCH404" SDR35
3" DIA
1.25" SCHD-40 PVC PRESSURE MANIFOLD W/ INDIVIDUAL
1.25" TEES OR ELBOWS TO 1.25" CUSTOM PERFORATED
DISTRIBUTION PIPE
CHAMBER END CAP
CONNECT 1.25" TRANSPORT LINE
TO 1.25" PRESSURE MANIFOLD. TRANSPORT PIPE INVERT A MIN.
2" HIGHER THAN INVERT OF MANIFOLD TEE CONNECTION. USE
45°OR 22.5° FITTINGS.
OWTS SYSTEM NOTES
1.ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY ONSITE
WASTEWATER TREATMENT SYSTEM (OWTS) REGULATIONS.
2.IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL UTILITY COMPANIES FOR
FIELD LOCATIONS OF UTILITIES PRIOR TO CONSTRUCTION AND EXCAVATION.
3.ALL SEWER LINES TO BE SDR-35 BEDDED IN CLASS 6, SDR-26 BEDDED IN SCREENED NATIVE OR
SCHEDULE 40 P.V.C. PIPE BEDDED IN SCREENED NATIVE MATERIAL UNLESS NOTED OTHERWISE.
4.INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE.
5.THE CONTRACTOR SHALL ENSURE ALL SEWER LINES AND SEPTIC TANKS ARE WATERTIGHT. ANY
POTENTIAL PLUMBING LEAKS SHALL BE REPAIRED TO AVOID EXCESSIVE WATER ENTERING THE
SEPTIC SYSTEM.
6.THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL WATERTIGHT
RISERS AS NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THE FINISHED SURFACE
GRADE.
7.A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OUTLET. INSTALL THE
INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTION AND
MAINTENANCE OF TANK FROM THE TANK RISERS.
8.AN EFFLUENT FILTER IS REQUIRED. INSTALL AN ORENCO SYSTEMS BIO TUBE VAULT WITH
INCLUDED EFFLUENT FILTER CARTRIDGE INCORPORATED WITH THE SPECIFIED DISCHARGE PUMP
ASSEMBLY. THE PUMP SYSTEM FILTER SHOULD BE INSPECTED EVERY SIX MONTHS. THE
EFFLUENT FILTER SHALL BE MAINTAINED AND CLEANED WHEN THE TANK IS PERIODICALLY
PUMPED OR AS NECESSARY. INSTALL A SUITABLE EXTENSION ON THE FILTER WITH A HANDLE
TO BE WITHIN 6" BELOW THE ACCESS LID.
9.THE TREATMENT BED MUST BE MARKED AND PROTECTED TO PREVENT DAMAGE FROM
VEHICULAR AND LIVESTOCK TRAFFIC.
10.THE ENTIRE TREATMENT BED SURFACE MUST BE SODDED OR RE-VEGETATED WITH GROUND
COVER.
11.THE TREATMENT BED SURFACE MUST BE CROWNED TO DIVERT SURFACE DRAINAGE AWAY
FROM THE BED.
12.THE DIMENSIONS SHOWN ON THE PLAN INDICATE MINIMUM AREA AND SEPARATION
DISTANCES FOR THE OWS COMPONENTS.
13.THE BED SHALL BE LEVEL WITH DISTRIBUTION PIPES INSTALLED FOR EQUAL PRESSURE
DISTRIBUTION.
14.THE BED SHALL BE OVER EXCAVATED TO ALLOW PLACEMENT OF THE SPECIFIED SAND FILTER
TREATMENT MEDIA LAYER. THE BOTTOM SURFACE AND SIDEWALLS OF THE TRENCH TO BE
SCARIFIED AND RAKED AS NECESSARY PRIOR TO PLACEMENT OF THE LEVELING SAND.
15.THE TREATMENT BED SHALL BE CONSTRUCTED WITH CHAMBER UNITS PLACED OVER THE
SPECIFIED SAND LAYER FOR USE AS SPRAY SHEILDS. THE CHAMBERS, SAND AND DISTRIBUTION
PIPES SHALL BE COVERED WITH FILTER FABRIC TO THE SIDES OF THE EXCAVATION.
16.THE MINIMUM COVER OVER THE TOP OF THE CHAMBER SPRAY SHIELD UNITS SHALL BE 12
INCHES NOT TO EXCEED 18".
17.THE BED CHAMBERS WILL BE BACKFILLED TO THE SURFACE WITH EXCAVATED MATERIAL VOID
OF ROCKS. THE BACKFILL MATERIAL SHALL NOT EXCEED 3" DIAMETER. A MINIMUM 4" DEPTH
OF TOPSOIL IS TO BE PLACED ABOVE THE BACKFILL TO THE FINISH SURFACE GRADE.
18.BALL VALVES (SIZE PER PLAN) SHALL BE INSTALLED ON THE TERMINAL ENDS OF THE
PERFORATED DISTRIBUTION PIPE JUST BELOW THE 4" INSPECTION PORTS.
19.ALL INSTALLATION OF THE CHAMBER UNITS SHALL BE IN CONFORMANCE WITH THE
MANUFACTURES INSTALLATION INSTRUCTIONS.
THE ABSORPTION FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES:
10 feet from any property line.
25 feet from any potable water supply line.
20 feet from any occupied dwelling.
100 feet from any well, spring or cistern.
25 feet from drainage swale or ditches
DISTRIBUTION SYSTEM NOTES:
1.EFFLUENT FROM THE SECONDARY SEPTIC TANK COMPARTMENT WILL FLOW TO THE SECOND
COMPARTMENT THAT HAS A BIO TUBE VAULT DOSING BASIN WITH A SIMPLEX HIGH HEAD
EFFLUENT PUMP ASSEMBLY. EFFLUENT WILL BE EQUALLY DISTRIBUTED TO THE TREATMENT
BED VIA THE SPECIFIED INDIVIDUAL TRANSPORT LINE TO THE PRESSURE MANIFOLD AT THE
HEAD OF THE BED. (SEE PLAN CALLOUTS NOTES)
2.THE SPECIFIED CUSTOM PERFORATED PRESSURE DISTRIBUTION LATERALS WILL BE INSTALLED
BELOW THE CENTER OF THE SPRAY SHEILD CHAMBER ROWS ON THE SAND LAYER SURFACE.
THE DISTRIBUTION PIPES WILL HAVE SPECIFIC DIAMETER ORIFICES DRILLED AS SPECIFIED AT
EQUAL INCREMENTS ALONG THE PIPE. (SEE PLAN CALLOUTS & PUMP CURVE NOTES)
3.THE DISTRIBUTION SYSTEM SHALL DISTRIBUTE FLOW EVENLY ACROSS THE INTERMITTENT SAND
FILTER BED. THE MINIMUM SLOPE OF THE TRANSPORT PIPE FROM THE DOSING TANK TO THE
PRESSURE MANIFOLD SHALL SHALL BE A MINIMUM 2.5% TO ALLOW FOR DRAIN BACK. ALL
DISTRIBUTION PIPING, CONNECTIONS AND FITTINGS SHALL BE WATERTIGHT AND INSTALLED TO
INSURE EQUAL DISTRIBUTION THROUGH THE SYSTEM.
4.THE PROPOSED DOSING VOLUME MUST BE SIZED TO ACCOUNT FOR THE DAILY FLOW AND THE
DOSING FREQUENCY BASED ON 0.25-1.0 GALLONS/ORIFICE/DOSE OR 3-5 TIMES THE
DISTRIBUTION PIPE VOLUME. MINIMUM TARGET DOSE CYCLES PER DAY IS 3-4.
TESTING, INSPECTIONS AND CONSTRUCTION MANAGEMENT
1.ADDITIONAL INSPECTIONS AND RECOMMENDATION WILL BE MADE BY THE ENGINEER DURING
CONSTRUCTION TO APPROVE THE LAYOUT OF THE TREATMENT FIELD SYSTEM, VERIFY
INSTALLATION OF SPECIFIED MATERIALS AND OWTS COMPONENTS.
2.PRIOR TO CONSTRUCTION OF THE PERMITTED SYSTEM THE ENGINEER SHOULD BE CONTACTED
BY THE PROJECT MANAGER/CONTRACTOR WELL IN ADVANCE TO PROVIDE ADEQUATE TIME TO
DISCUSS THE SYSTEM COMPONENTS WITH THE CONTRACTOR, ANSWER QUESTIONS, RESOLVE
ANY CONFLICT ISSUES AND SCHEDULE INSPECTION SITE VISITS BASED ON CONSTRUCTION
PROGRESS. A PRE-OWS CONSTRUCTION MEETING WITH THE ENGINEER, THE CONTRACTOR,
ELECTRICIAN AND THE QUALIFIED INSTALLER IS REQUIRED PRIOR TO INSTALLATION OF THE
OWTS COMPONENTS.
3.REGULATIONS REQUIRE THAT THE DESIGN ENGINEER OF RECORD PERFORM SITE INSPECTIONS
OF THE PERMITTED SYSTEM DURING CONSTRUCTION AND PROVIDE "AS-BUILT"
DOCUMENTATION OF THE INSTALLED SYSTEM TO THE THE COUNTY AFTER CONSTRUCTION IS
COMPLETE. WE RECOMMEND THAT INSTALLED OWS COMPONENTS BE SURVEYED TO OBTAIN
REQUIRED AS-BUILT INFORMATION.
4.CONTRACTOR SHOULD DISCUSS ISSUES REGARDING SPECIFICATIONS, INSTALLATION AND
OPERATION OF OWTS MECHANICAL SYSTEMS AND CONTROLS WITH THE SUPPLIER/INSTALLER
AND/OR THE ENGINEER.
5.OUR DESIGN AND RECOMMENDATIONS ARE BASED UPON OUR EVALUATION OF THE EXISTING
AND PROPOSED SITE CONDITIONS AND INFORMATION SUPPLIED TO US BY OTHERS. IF SITE
CONDITIONS ARE FOUND TO BE DIFFERENT FROM CONDITIONS ASSUMED OR INDICATED, WE
SHOULD BE NOTIFIED TO EVALUATE ANY EFFECT ON THE PROPOSED OWTS.
ELECTRICAL NOTES
1.AN ORENCO SYSTEMS CONTROL PANEL SHALL BE INSTALLED BY A QUALIFIED INSTALLER IN
COORDINATION WITH THE ELECTRICIAN. WE RECOMMEND 110 VOLT ELECTRIC SERVICE BE
PROVIDED TO THE PUMP. THE POWER SUPPLY FOR THE PUMPS AND CONTROLS SHALL CONSIST
OF (1) 20 AMP DOUBLE POLE CIRCUITS FOR THE PUMP AND 10 AMP SINGLE POLE CIRCUITS
FOR CONTROLS. PANELS TO BE INSTALLED IN LINE OF SITE WITH TANK AND OR PUMP BASINS.
2.THE CONTRACTOR SHALL INSTALL ELECTRICAL SUPPLY WIRE IN CONDUIT FROM THE SERVICE
PANEL TO THE WALL MOUNTED CONTROL PANEL.
3.THE SYSTEM QUALIFIED INSTALLER SHALL INSTALL ELECTRICAL DIRECT BURY WIRES OR WIRES IN
CONDUIT FROM THE CONTROL PANEL(S) TO THE DISCHARGE PUMP ASSEMBLY'S JUNCTION BOX
ON THE RESPECTIVE RISERS OVER THE TANK OR BASINS. INSTALL CODED WIRES PER CONTROL
PANEL DIAGRAM. INSTALL ALL WIRES FOR PUMP AND CONTROLS WITH CONDUIT SEAL NEAR
SPLICE BOX. ELECTRICIAN TO COORDINATE W/ SYSTEM INSTALLER. INSTALLATION
CONSULTATION BY VALLEY PRECAST, INC.
Design Calculations OWTS
Installation of an OWTS with a minimum 2-bedroom capacity.
From the State Regulation 43:
Minimum population based on 2 bedrooms = 4 persons.
Gallons per day per person =75 gal/person/day, No peaking factor
Max. Design flow (Qd)gallons/day = (# of people) x (avg. flow)gal/person/day.
Design flow Qd = 2*75=300 gpd
Septic Tank Design: Use a 1250 gallon, two compartment septic tank with a bio-tube dosing
assembly in the second chamber.
Sub Surface Conditions and Testing:
Subsurface soil investigations and USDA soil texture method tests were performed by Sopris
Engineering. The soils in the area of the proposed absorption field were sampled and
characterized by application of the USDA soil texture method test. The soils were tested to
determine the hydraulic loading rate and to confirm the appropriate absorptive surface level
suitable for an intermittent sand filter treatment system in native soils. The soils below nil to
3 inches of topsoil consist of medium dense gravelly sandy loam material to 1.5 to 6 feet
below the surface. The soil appears to be consistent across the site.
The native soils sampled from 2-3 feet below the surface are characterized as a soil type 2
consisting of sandy silt loam texture with moderate granular structure. This soil has an
effective loading rate for conventional soil treatment of 0.6 Gal/S.F./day for a level 1
conventional treatment system. Due to limited area and to provide optimal treatment an
intermittent sand filter is recommended to provide for a treatment level TL3 system
(43.11.C.2.a.) No free water was encountered in excavations on site. Groundwater levels are
expected to be below 10 feet from the existing surface grades.
The soils are suitable for the installation of the sand filter treatment bed system consisting of
a minimum 24" depth of sand Media that will be fully pressure dosed meeting the
Requirments under sections (43.10.E.3.a & 43.11.C.b.c.d.1&d.3).
An additional soil evaluation will be performed during construction to verify the soils in the
actual field excavation.
Intermittent Sand Filter Treatment Unit/ Absorption System Design:
The treatment/absorption field is designed based on utilizing the effective Long Term
Acceptance Rate (LTAR) for an intermittent sand filter treatment system utilizing pressure
dosed distribution laterals and gravelless chamber units as "spray shields". The new
treatment system will consist of a fully pressure dosed sand filter Treatment bed System with
a 24-inch layer of secondary filter sand (ASTM-C33, "Concrete sand"), in accordance with
section (43.11.C.d.1&d.3).
Long Term Acceptance Rate (LTAR)
Considering the allowable application of the County OWTS regulation 43:
Receiving septic tank effluent, the treatment level for intermittent sand filters is considered
TL3 for the minimum 24" depth of treatment media with the upper infiltrative surface being
at least 3-feet above a limiting layer (43.11.A.3.c);
Maximum hydraulic loading rate for TL1 effluent applied to “Secondary Sand Media” in an
unlined sand filter is 0.8 gal./sq.ft./day, or the long term acceptance rate of the receiving soil
Type 2 for TL3 (1.1 gal./S.F./day) (Table 10-1) whichever results in the larger area
(43.11.A.3.b.(2).
The maximum Loading rate is therefore 0.8 gal./sq.ft./day
Loading factors; (Table 10-2, pressure dosed application bed = 1.0 )
A(sf) = Qd .: A = Area;
LTAR LTAR = 0.8 Gal/S.F./day for secondary sand media
ASTM-C33, "Concrete sand"
Qd = flow (gal/day) = 300 gpd
L.F.1=1.0 pressure dosing
A(sf) = 300 gpd x 1.0 = 375 S.F.
0.8 Gal/S.F./day
Excavate the the 47.0' by 8' bed to a minimum 3.0 depth below finish grade. Scarify surface
and backfill with 24-inches of ASTM-C33, "Concrete sand"
Install 2 runs of custom perforated distribution laterals on top of sand media and cover with
22 Quick-4 chambers in 2 rows with 11 chamber units per row for use as pressure dose spray
shields, as delineated on the plan. The bed will be dosed from the simplex high head
distribution pump system installed in the second compartment of the septic tank.
GENERAL NOTES:
1.THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS
ENGINEERING.
2.THE PROPOSED LOT CONDITIONS AND SURVEY INFORMATION BY SOPRIS ENGINEERING.
3.PRIMARY OWNER NAME AND ADDRESS: OSENTOWSKI, JEROME
PO BOX 631, BASALT, CO 81621-0631
4.LEGAL SUMMARY QUARTER: TRACT: 44 SECTION: 4 TOWNSHIP: 8 RANGE: 86 BK-0218
PG-0214 WD , 07-06-70, BK-0239 PG-0954 WD 05-13-75
5.SITE ADDRESS: 1919 CEDAR DRIVE, BASALT, CO 81621
6.PARCEL NUMBER: 2467-043-00-007
7.EAGLE COUNTY PERMIT #: ____________ ISSUED __________
8.CONTRACTOR: ______________________________________________________
INTERMITTENT SAND FILTER LAYER EFFECTIVE SIZE
0.25-0.6 MM, WITH UNIFORM. COEF.=<4.0 USE
CONCRETE SAND-ASTM-33
MACHINE COMPACT AND LEVEL TOP SURFACE'24"
NOTE:
THE INTERMITTENT SAND FILTER BED MUST BE LEVEL. INSTALL CHAMBERS WITH INLET AND
END CAPS OVER SAND LAYERT FOR USE AS SPRAY SHEILDS. INSTALL INDIVIDUAL
DISTRIBUTION LATERALS TO THE HEAD OF EACH CHAMBER ROW FROM A MAINIFOLD
CONNECTING EACH CHAMBER ROW. CUSTOM PERFORATED PIPE TO BE LAID ON TOP OF
THE SAND LAYER WITH ORIFICES ORIENTED UPWARD EXCEPT THE FIRST AND LAST ORIFICES
TO BE ORIENTED DOWNWARD. INSTALL A 4" VERTICAL INSPECTION RISER FROM THE
MOLDED END CAP CUT OUT ON THE LAST CHAMBER IN EACH ROW. INSTALL A BALL VALVE
AT THE END OF THE DISTRIBUTION LINE ACCESSIBLE FROM THE INSPECTION PORT TO
ALLOW FLUSHING OF THE LINE. THE VALVE IS CLOSED FOR NORMAL OPERATION.
8'-MIN.
12" - 18"
MIN. MAX.
PRESSURE DISTRIBUTION
PIPE CONNECTED THROUGH END CAP
TO CUSTOM PERFORATED DISTRIBUTION
LATERAL PIPE NATIVE GRAVELLY LOAMY SAND SOIL
WITH COBBLES
EXISTING GRADE
CUSTUME PERFORATED PRESSURE PIPE WITH
ORIFICES AT 12 O'CLOCK. SECURE PIPE WITH
PUSH IN STAPLES
SCARIFY/TILL BOTTOM SURFACE AND
EXCAVATION SIDE WALLS
QUICK-4 INFILTRATOR
OR EQUAL BIO DIFFUSER
SPRAY SHIELDS
SCREENED BACKFILL
NATIVE SOIL
UNDISTURBED EARTH
CROWN FIELD TRENCH TO
DIVERT SURFACE WATER
24"
1.25" TEE CONNECTION
SEED AND MULCH FINISH SURFACE
MAINTAIN SUITABLE VEGETATIVE COVER
1.25" SCHD-40 PVC
DISTRIBUTION MANIFOLDTOPSOIL
PRESSURE DOSED INTERMITTENT SAND FILTER SYSTEM
WITH CHAMBER SPRAY SHEILDS
0.5' (TYP.)
1.0'(TYP.)OPRISESNGINEERING, LLC.CIVIL CONSULTANTSJOB NO.
SHEET
DATE:NO.REVISIONBYDATE502 MAIN STREETCARBONDALE, CO 81623(970) 704-0311FAX: (970)-704-0313DESIGNED BYDRAWN BYCHECKED BYDATEINITIALS18192
C-4G:\2018\18192\18192-DE ACCESS-2.DWG
DEC 7, 2018 OWTS CONSTRUCTION DOCUMENT - PERMIT APPLICATIONCOLORADO ROCKY MOUNTAIN PERMACULTURE INSTITUTETract 44 S4,T8,R86W, 1919 CEDAR DR, BASALT,ONSITE WASTEWATER TREATMENT SYSTEMPLAN AND DETAILSO1.REVISE DESIGN PER UPDATED REGULATIONS & County CommentsPER04-10-19
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