HomeMy WebLinkAboutDesign Report and Drawing 11.30.2020November 30, 2020
Craig Wilcox
0188 County Rd 226
Rifle Co 81650
RE: Design Report—Onsite Wastewater Treatment System (OWTS), Wilcox Residence, 0188 C.R. 211, A Parcel
in Sections 9 & 11 T5S R92w 6th PM, M/B, Garfield County, Colorado
SE Job No. 30211.01 Parcel No: 2727-091-00-018, Previous Garfield County ISDS Permits: 4419
Dear Craig:
This letter report presents the applicable findings in regard to the design and construction of a upgrade/replacement
Onsite Wastewater Treatment System (OWTS) at the above referenced Site, in support of a OWTS upgrade permit
application to Garfield County. The existing previously permitted ISDS absorption system is severely compromised
and needs to be replaced. The OWTS design is based on recent site assessment observations by Sopris Engineering
of existing physical site features, conditions and geotechnical soils evaluation with respect to the proposed
residential usage and applicable regulatory design criteria in accordance with State and County OWTS Regulations.
The design recommendations, specifications and construction details are delineated on the attached OWTS
permit/construction plan that was prepared with GIS, Survey Plat information and aerial mapping. The design
criteria and system sizing information is summarized below.
Summary Existing System Conditions
The waste flow from the existing residence has been served by an OWTS permitted at the time of County permit in
2008, under County ISDS permit No. 1419 to serve a 2-bedroom residence. The existing property is developed with
a multiple utility structures and the existing residential structure that replaced a previous historic residential
structure that was demolished in 2008. The subject residential structure was constructed with associated site
improvements within the footprint of the older structure and included a new OWTS, under, County ISDS permit No.
4419 to serve a total 2-bedroom equivalent capacity usage. The existing residence has two active bedrooms and two
rooms that could be utilized as bedrooms. The existing 12 year old permitted system consist of a two -compartment
Copeland 1000-gallon concrete septic tank and two 62.5' by 3' standard chamber gravity absorption trenches that
were installed at an excessive depth at 6'-7' below surface grades. The chamber trenches are water logged and
exhibit minimal recovery capacity, being in need of replacement. The failed condition of the absorption system has
resulting in the septic tank being pumped frequently during the last two months. The two existing deep chamber will
be abandoned in place. The existing septic tank has 24-inch concrete risers with lids at the surface and is equipped
with sanitary tees and effluent filter. Based on the existing observed system conditions, the owners have decided to
replace the system with a new regulatory compliant system with adequate capacity to serve an equivalent 4-
bedroom residence. This design provides for an increase in septic tank volume, addition of pressurized dosing and
replacement STU based on treatment for a 4-bedroom capacity single family residence onsite wastewater treatment
system (OWTS).
Summary Design Criteria
The replacement OWTS is designed for a treatment capacity of 525 gallons per day based on the design wastewater
flow to serve a 4-bedroom residence in accordance with Table 6-2 values, Section 43.6, A.4. The replacement
OWTS will utilize the existing 1,000 gallon single compartment concrete septic tank and a new 1,000 gallon 2-
compartment concrete or reinforced plastic septic tank installed in series adjacent to the existing tank within the
lawn area east of the dwelling structure. The existing backfill over the 1,000 gallon septic tank outlet pipewill be
excavated to below the outlet pipe invert as necessary to install a new pipe connection to the new septic/dosing
tank. New with fiber lids will be installed on the existing septic tank along with appropriate pipe connection to the
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERING • LLC
civil consultants
Wilcox Residence
OWTS, 0188 C.R. 226
SE Job No. 30211.01
November 30, 2020
Page2
new tank in series. The new 1,000 gallon 2-compartment septic/dosing tank will be installed with ribbed PVC risers
with fiber lids at the surface, inlet sanitary tee, an Orenco biotube high head effluent pump assembly. The existing
gravity sewer pipe will be maintained from the residential structures to the inlet of the existing tank.
A 1.5-inch schedule-40 effluent transport pipe from the discharge assembly in the 2nd compartment of the new
septic/dosing tank will be installed to an automatic distribution valve (ADV) adjacent to the new replacement STU
absorption field with individual 1.5-inch schedule-40 distribution pipes installed to the head of each new chamber
trench.
The new replacement soil treatment unit (STU) will consist of leaching chamber trenches that provide 840 S.F. of
total absorption area to be installed at shallow depths not to exceed 30" below existing surface grades. The septic
tank effluent will be pressure discharged through the ADV for alternative dosing of 4 full pressure dosed trenches.
The effluent will be equally distributed along the length of each trench via a custom perforated 1.5-inch schedule-40
distribution lateral installed on the absorptive surface from the head to the terminal end cap of each trench.
Observation ports with caps will be installed on each end chamber unit. Each terminal end of the distribution lateral
will be capped with a 1.5-inch ball valve centered under the inspection port. The design is in compliance with the
current County regulations with design calculations based on the soil type, texture and structure with an appropriate
long term acceptance rate (LTAR). The designed system meets all required setbacks and will be installed within the
general location indicated on the plan. The existing well serving the residence, (Permit No. ) is located
over 100 feet Northwest of the proposed field area. Our design is outlined below and delineated on the attached C-1
OWTS plan.
Design Flow
The design flow is calculated as follows for the total current and design waste flows of the existing single family
dwelling. The replacement OWTS is designed for a treatment capacity of 525 gallons per day based on the design
wastewater flow to serve a 4-bedroom capacity residence in accordance with Table 6-2 values, Section 43.6, A.4.
Regulation 43:
Minimum population based on 2 person per bedroom for the first 3 bedrooms = 6 persons and 1 person per
bedroom for each additional bedroom = 1 persons for a total of 7 persons at 75 gal/person/day.
Design flow (Qd)gallons/day = (# of people) x (avg. flow)gal/person/day.
Design flow Qd = 7*75=525 gpd
Septic Tank Design
The septic tank capacity required for a minimum 48 hour retention time is calculated as follows:
V = 525 gal/day * 2 = 1050 gallons. Use the existing 1,000 gallon, single compartment concrete tank and a new
1,000 gallon 2-compartment concrete or reinforced plastic septic tank installed in series for a total tank capacity of
2,000 gallons including a minimum 300 gallons in the second compartment of the new septic/dosing tank equipped
with a biotube effluent pump vault.
Sub Surface Conditions and Observation
A subsurface soil investigation and site assessment was performed by Sopris Engineering on November 19, 2020.
The soils from two profile pits, in the vicinity of the proposed STU field envelope area were sampled and
characterized by application of the USDA visual/tactile soil texture method analysis. The soils below 12 inches of
topsoil consist of medium dense clay loam soil with less than 2% scattered gravel or rock content to7 feet below the
surface grades. The soils appear to be consistent across the site from observations in the excavated profile pits.
Wilcox Residence
OWTS, 0188 C.R. 226
SE Job No. 30211.01
November 30, 2020
Page3
The native soils sampled from 2-3 feet below the surface are characterized as a soil type3 consisting of clay loam
texture with slightly blocky granular structure. This soil has an effective loading rate for conventional soil treatment
of 0.35 Gal/S.F./day for a level 1 STU system. The equivalent percolation rate is assumed to be 40-60 minutes per
inch. No free water was encountered in excavations on site. Seasonal high Groundwater levels are expected to be
below 10 feet from the existing surface grades. The soils are suitable for a conventional shallow absorption field
consisting of pressure dosed gravelless infiltration chamber units in a trench configuration.
Treatment -Soil Treatment Unit/ Absorption System Design
The treatment/absorption field is designed based on utilizing the effective Long Term Acceptance Rate (LTAR) for
the native soils and the application of appropriate loading factors for a soil treatment unit system utilizing pressure
distribution to full pressure dosed gravelless chamber trenches. The new treatment system and absorption field will
consist of pressure dosed distribution of septic tank effluent from a biotube high head pump assembly vault to an
automatic disturbing valve with individual distribution pipes routed to each chamber trench installed with custom
perforated distribution laterals. Each of the four trenches will be alternately dosed with equal distribution across the
native soil absorptive surface.
The shallow STU trenches shall be installed with a maximum depth to the absorptive surface of 30" inches from
finish surface grades and backfilled with approximately 3-inches of final grading topsoil over the trenches placed to
allow positive drainage away from the surface. Chambers shall be installed level in native soil over an approximate
3-inch layer of concrete sand utilized for a leveling course over the scarified absorptive surface at the bottom of
each trench excavation. This sand levelling course will serve to protect and preserve the native soil architecture.
Each trench will be constructed level with minimum exaction depths. The trenches will generally be placed very
shallow on the west end and slightly deeper toward the east end based on the slight surface gradient observed.
grades A minimum separation distance of 4 feet will be maintained between the individual trench sidewalls.
The engineer, prior to installation shall inspect the trench excavation to confirm soil conditions and installation
procedures. For colder weather installation, all excavation, component placement and initial backfill should be
performed in dry weather conditions and any segments of trenching should be substantially completed prior to any
precipitation event. It is recommended that exposed chambers be backfilled as soon as possible to prevent any
rain/snow from accumulating in the open trenches. Terminals ends should be left exposed for final inspection by
engineer. Thermal blankets may be used to protect any exposed terminal ends. The installer shall photo document
the installation of trench components prior to backfill of any trench segment. All septic system components and
trench installations are to be approved by the Engineer prior to backfilling.
Field Sizing:
Based onLong Term Acceptance Rate (LTAR) for Receiving Wastewater Treatment Level 1;
Soil type 3 loading rate for clay loam with blocky to granular structure is (0.35 gal./S.F./day) utilizing applicable
loading factors for full pressure dosed gravelless chamber trenches.
A(sf) = Qd x L.F.1 x L.F.2 .: A = Area;
LTAR LTAR = 0.35 Gal/S.F./day for clay loam
Qd = flow (gal/day) = 525 gpd
L.F.1=0.8 (Table 10-2, Pressure dosed trenches distribution)
L.F.2=0.7 (Table 10-3, gravelless chambers Category 3)
A(sf) = 525 gpd x 0.8 x 0.7 = 840 S.F. absorption treatment area required
0.35 Gal/S.F./day
Wilcox Residence
OWTS, 0188 C.R. 226
SE Job No. 30211.01
November 30, 2020
Page4
Number of Quick-4 Infiltrator chambers 4'x3'x12"chambers:
840 S.F = 70 chambers; Use 72 chambers
12 S.F./Chamber
STU Layout
Use 72 Quick-4 Infiltrator chambers in four trenches 74' long by 3' wide with 18 chamber units per trench plus two
end caps as delineated on the plan or equivalent Arc/Bio-Diffuser chamber trenches. The septic tank effluent will be
pressure distributed to the head of each chamber trench via individual distribution pipes from an automatic
distribution valve.
Excavate each 74' by 3' trench to a maximum 36"depth below finish grade. The native soil absorptive surface shall
be scarified by a final single pass of the excavator bucket teeth and initially covered with a 3" levelling course of
concrete sand, prior to placement of chambers and perforated distribution laterals. Chamber shall be placed level in
each trench and backfilled with non -frozen excavated material. Install each of the 4 trenches with the specified
custom perforated 1.5-inch distribution lateral on top of levelling course/absorptive surface and place the chambers
with end caps, as delineated on the plan. Filter fabric shall be placed over the chambers and backfilled with a
minimum 12-inch depth of cover including a minimum 3-inch topsoil /recovered sod layer placed over the trench to
approximately 2" above existing surface grades.
Effluent Distribution System
The OWTS field shall be fully pressure dosed along the entire length of each trench. An Orenco Systems Bio Tube
pump vault system will be installed with an effluent screen in the second compai lruent of the septic/dosing tank.
The pump system shall incorporate a single high head pump. The simplex pump assembly will demand dose
effluent through a single 1.5-inch diameter PVC transport pipe from the pump assembly and connect to a four outlet
ADU (Model 6404) valve housed in a ribbed PVC riser. The ADU must be installed with the inlet pipe at a high
point relative to the discharge assembly outlet and the individual distribution pipe connections at the head of each
trench. The 1.5" discharge transport pipe shall be installed with a minimum 2.5% continuous slope to allow for
drainage of the pipe back to the pump vault.
The effluent will be alternately equally pressure dosed through each 1.5-inch custom perforated distribution lateral
running the length of the trench installed on the absorptive surface centered below the chambers. The distribution
laterals will have 5/32-inch orifices drilled every 2.0 feet oriented upward to spray against the interior chamber
units. The first and last orifice will be drilled and oriented downward with an orifice shield to allow drainage of the
line. Individual 1.5-inch 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. A vertical 4-inch
inspection port will be installed from an end cap inspection port penetration at the terminal end of each trench and
one 4-inch inspection port will be installed from a end cap penetration at the head of each trench. All inspection
ports shall extend a minimum 2-inches above the finish grade and be topped with a treaded cap.
Pump operations shall be controlled by a pedestal mounted exterior control panel in close proximity with 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.
Construction and Inspections
Prior to construction of the permitted system, the engineer should be contacted by the contractor and owner to
discuss the system components with the contractor, answer questions, resolve any conflict issues and schedule
Wilcox Residence
OWTS, 0188 C.R. 226
SE Job No. 30211.01
November 30, 2020
Pages
inspection site visits based on construction progress. A pre-OWTS construction meeting is essential and required
prior to installation of the OWTS. All septic system components shall be staked in the field for approval by the
Engineer prior to excavation.
During construction the engineer will consult with installer regarding installation procedures and schedules, review
photographs and attempt to perform timely inspections daily to allow for backfilling during cold weather conditions.
All septic system components and trench installations are to be approved by the Engineer prior to backfilling. All
installation will be inspected, field measured, reported and delineated in the Certification letter and record drawing.
The contractor needs to photo document all OWTS construction phases and supply photos to the Engineer on a
daily basis.
County Regulations require that the Engineers 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. With respect to cold weather and/or winter conditions efforts to allow county inspection of installed
component prior to final backfill shall be coordinated to the extent possible.
OWS Operation and Maintenance
Ownership of the system and responsibility for maintenance and repair will remain with the property Owner. The
Owner is encouraged to retain the services of qualified personnel to inspect the OWTS dosing and distribution
systems and to perform all maintenance and repairs necessary to ensure that the system components are maintained
in good operating condition. The tanks and field system should be inspected and maintained as needed. Suitable
vegetative cover should be re-established in the field area. The components of the OWTS system should inspected
within 14 days of being placed into operation, again in early spring and thereafter should be inspected and
maintained bi-annually. The tank, absorption field and other system components should be visually inspected bi-
annually for debris, damage, leaks, or other potential problems. In general, for a properly utilized system, septic
tanks should be pumped every 3 - 5years. The effluent filter and pump floats should be cleaned every six months
and at the time of tank 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
p4vr
Paul E. Rutledge
Design Engineer
G:\2020\30211-WILCOX\CIVIL\CIVIL DWGS\DE\30211-DE-OWTS PLANDWG.DWG - Dec 01, 2020 - 7:18am
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lc I Design Calculations OWTS GENERAL NOTES:
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NATIVE, YARD OR LANDSCAPED SURFACE 1. THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS ENGINEERIN .
II The design flow is calculated as follows for the total waste flows of the from the existing single
familyresidence. The waste flow from the existingresidence has been served byan OWTS
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2. THE PROPOSED LOT CONDITIONS BY SOPRIS ENGINEERING AND OWNERS.
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1 permitted at the time of county permit in 2008, under County ISDS permit No. 4419 to serve
! the existing 2-bedroom residence. This design is for the replacement of the older chamber 3. THE EXISITNG LOT CONDITIONS PER COUNTY GIS DATA BASE, AERIAL MAPPING, LIDAR
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\�/ \� trench system that is currentlycompromised due to assumed partiallyclogged soils. The system TOPOGRAPHY AND SURVEY INFORMATION BY BOOK CLIFFS SURVEY SERVICES, INC.
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%/ is exhibiting slower infiltrative capacity and reduced recovery, therefore in need of replacement.
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t / The existing functioning 1000 gallon two compartment concrete septic tank has been pumped a 4. PRIMARY OWNER NAME & ADDRESS: CRAIG WILCOX
EXCAVATED MATERIAL COMPACTED4inefew in is lids
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times recent years and equipped with sanitary tees and concrete risers with 0188 COUNTY RD 226
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TO 90% STANDARD PROCTOR installed at the surface. The upgrade design utilizes the existing tank with the addition of new RIFLE CO 81650
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1000 gallon septic/dosing tank with High head pump biotube vault assembly toe discharge to
new full pressure dosed chamber trenches sized for 4 bedroom capacity usage. The two 5. LEGAL SUMMARY: A PARCEL IN SEC 9 & 11 T5S R92W 6TH PM, M/B
existing chamber trenches were installed approximately 6 feet below the surface and will be
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/�\-t-w-t\ �/ SUITABLE NATIVE BACKFILL abandoned in place. 6. SITE ADDRESS: 0188 COUNTY RD 226, RIFLE, CO 81650
The treatment capacity for the replacement system is designed for a minimum 3-bedroom 7. PARCEL NUMBER: 212709100018
COMPACTED SUBGRADE residence adequate for the existing2-bedroom single familyhome that willprovide additional
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capacity for additional usage as needed. 8. GARFIELD COUNTY PERMIT #: ISSUED
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TRENCH CROSS-SECTION FOR From the Regulation 43 usage table PREVIOUS CURRENT ISDS PERMIT NUMBER 4419 ISSUED 10 09 08
PREVIOUS CONTRACTOR, WALTERS EXCAVATION
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..........' SDR-35.26 OR SCHD-40 PIPES total of 6 persons usage.
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1 N.T.S. 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.
OWTS SYSTEM NOTES
CONNECT 1.5" TRANSPORT PIPE FROM ADV Design flow Qd = 6*75=450 gpd
TO INDIVIDUAL 1.5" PRESSURE DISTRIBUTION PIPE. TRANSPORT 1. ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY ONSITE
PIPE INVERT MIN. 2 HIGHER THAN INVERT OF PRESSURE Septic/Dosing Tank Design: WASTEWATER TREATMENT SYSTEM (OWTS) REGULATIONS.
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DISTRIBUTION LATERAL CONNECTION.
The septic tank capacity required for a minimum 48 hour retention time is calculated as follows: 2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL UTILITY COMPANIES FOR
1.5" CUSTOM PERFORATED PVA PRESSURE DISTRIBUTIONTIOLATERALPIPE PIPEO 1.5" V = 450 al da * 2 = 900 gallons. Continue use of the 1 000 gallon, two compartment concrete FIELD LOCATIONS OF UTILITIES PRIOR TO CONSTRUCTION AND EXCAVATION.
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septic tank with an inlet/outlet sanitary tees and existing riser/lids. Install an effluent filter in
the outlet sanitary tee in the second chamber. Intall a 500 gallon effluent dosing in series 3. ALL SEWER LINES TO BE SDR-35 OR SCHEDULE 40 P.V.C. PIPE UNLESS NOTED OTHERWISE.
outlet pipe invert. Tank shall be installed with with a PVC ribbed riser and fiber lid a the finish
grade surface. 4. INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE AND AN
0%� CHAMBER END CAP adjacent to the existing septic tank and set with inlet approximately 4" lower then existing tank
= ADDITIONAL CLEANOUT WITHIN 100' SECTION OF EFFLUENT DISCHARGE PIPE
Sub Surface Conditions and Testin 5. THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL WATERTIGHT
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A subsurface soil investigation and site assessment was performed by Sopris Engineering in on RISERS AS NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THE FINISHED SURFACE
� `1 %% GRADE. BACKFILL WITH SUITABLE NATIVE SOIL FREE OF BOULDER AND ROCK IN EXCESS OF 3"
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/ I lNovember 19, 2020. The soils in the proposed field envelope area were sampled and
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�� characterized by application of the USDA visual/tactile soil texture method analysis. The soils
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below 12 inches of topsoil/fill material consist of medium dense clay loam soil with less than 2% 6. A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OUTLET. INSTALL THE
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' .:. scattered ravel or rock content to 7 feet below the surface grades. The soils appear to be INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTION AND
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consistent across the site observations the excavated profile pits.
N.T.S. MAINTENANCE OF TANK FROM THE TANK RISERS.
The native soils sampled from 2-3 feet below the surface are characterized as a soil type 3 7. INSTALL A 4" EFFLUENT FILTER ON THE 4" OUTLET TEE OF THE SEPTIC TANK. THE FILTER
consisting of clay loam texture with fine granular structure. This soil has an effective loading SHOULD BE INSPECTED EVERY SIX MONTHS. THE EFFLUENT FILTER SHALL BE MAINTAINED
rate for conventional soil treatment of 0.35 Gal/S.F./day for a level 1 conventional treatment AND CLEANED WHEN THE TANK IS PERIODICALLY PUMPED OR AS NECESSARY. INSTALL A
system. The equivalent percolation rate is assumed to be 40-60 minutes per inch. No free water SUITABLE EXTENSION ON THE FILTER WITH A HANDLE TO BE WITHIN 6"BELOW THE ACCESS
was encountered in excavations on site. Seasonal high Groundwater levls are expected to be LID
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below 10 feet from the existing surface grades. The soils are suitable for a conventional shallow
absorption field consisting of pressure dosed ravelless infiltration chamber units in a trench 8. THE CONTRACTOR SHALL ENSURE THAT THE SEWER LINES SEPTIC TANK AND RISERS ARE
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configuration. ALL PLUMBING FIXTURES AND OWTS COMPONENTS SHALL BE INSTALLED AND
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Treatment -Sol Treatment Unit/Absorption System Design. PREVENT LEAKAGE FROM THE SYSTEM. IN-HOUSE PLUMBING FIXTURES SHALL BE
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The treatment/absorption field is designed based on utilizing the effective Long Term
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9. THE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE MINIMUM AREA, LENGTH,
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chamber trenches. The new treatment system and absorption field will consist of FIELD.
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10. THE ABSORPTION TRENCHES SHALL BE EXCAVATED TO LEVEL GRADE IN NATIVE EARTH. THE
trench custom perforated distribution laterals with treatment across the native soil absorptive
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below the leaching TRENCH BOTTOM AND SIDEWALLS SHALL BE SCARIFIED AND/OR RACKED IF SMEARING
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OCCURS. IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PART OF
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Long Term Acceptance Rate (LTAR) THE EXCAVATION OVER 6" FROM THE PROPOSED TRENCH BOTTOM SURFACE, OVER
CID
C
Horne
PLACE ON THE TOP OF THE ABSORPTIVE SURFACE. USE WIRE STAPLES TO
r';m°°r°tq ;^°°a zef'°°° q
m"°°o, a,araasPa°zPPa 9Pm
EXCAVATE AND BACKFILL WITH SAND.
1
;''Log .,
1.5' SCHD-40 DISTRIBUTION PIPES SECURE PRESSURE PIPE TO SURFACE. ORIENT ORIFICES BETWEEN THE FIRST
r
Considering the application of the state regulation 43:
..
N
& LAST TO SPRAY UPWARD (12 O'CLOCK) TOWARD TOP INTERIOR OF
T,aa=oaayalla lr;eere awe"® 4., o=
Receiving Wastewater Treatment Level 1; Soil type 3 loading rate for a clay loam is (0.35
DATE
10-02-2019
F)" %1
INSTALL AT MIN. 1% TO END CAP �
per °e
11. THE LEACHING CHAMBERS SHALL BE INSTALLED LEVEL WITH A MINIMUM COVER OF 10
gal./S.F./day).; Loading factors; (Table 10 2, pressured dosed trenches = 0.8) and
J�31
CONNECTION FROM ADU HP (TYP) CHAMBERS. DRILL FIRST & LAST 5/32" ORIFICES ORIENTED DOWNWARD
PdcflanalHeadL°•aes
INCHES NOT TO EXCEED 24 INCHES.
,
C G 4.4
•'
WITH SNAP ON SPRAY SHIELDS AT BOTH ENDS OF DISTRIBUTION LATERAL
055'"`°°9"°'eC"efae 9
'""°m"'Va
\
(Table 10-3, Chambers Category 3 = 0.7)
EXISTING 4"PVC GRAVITY SEWER PIPE\
a
f
, `
-Ia
\
aP^^ as
00
12 LEACHING CHAMBERS WILL BE PLACED IN THE EXCAVATION OVER THE NATIVE SOIL OR
/
1 -
SCHD 40 TRANSPORT PIPE
,g�= a ,•°t
a°r°^soasaa
�SELECT
A(sf) - Qd x LF.1 x LF.2 .: A -Area; G COURSE. END CAPS SHALL BE
SOIL REPLACEMENT OR ASTM-33 SAND LEVELING
�' :..:..:.:.
,:
/
�'
�--�� ��
$
La55 ewme,er
as e=;
for loam
/
W 2 0' MIN.DEPTH OF BURY
APPROXIMATE LOCATION OF (Z) 62.5 X 3' FAILING \
aaP
�\
, ",
LTAR 0.35 GaI/S.F./day
LTAR = clay INSTALLED ON THE END CHAMBERS IN EACH TRENCH
+
1 g. Y D
EXISTING4
STD GRAVITY CHAMBER TRENCHES IN PLACE 6'
Ppe V°lames
Qd = flow (al/day) = 450 gpd
}
w
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CLEANOUTS •
INSTALL AT MIN. 2.5% FOR DRAINBACK
°ala,Tr„°=oa„LI°e a`°`� e"e zs 'ala
-
L.F.1=0.8 full dosed Distribution
o_
y
_�
$
DEEP TO BE ABANDONED IN PLACE.
�_
pressure trenches
p 13. VERTICAL INSPECTION PORTS SHALL BE INSTALLED FROM THE PRE MARKED HOLE ON THE
/
`31.4
gals
,ramF„
L.F.2=0.7 Chambers Category 23
00 ;i
i
0
0
`
t,
24'
,
Total 1 gals
°,°Iv°I�er l�ele °z
m
g y TOP OF EACH END CHAMBER CAP . (TYP. BOTH ENDS OF EACH ROW) THE PORTS MAY HAVE
,
--f-f-
�h
Neap°^vaetaw°h
THREADED CAPS AT GRADE.
f°
�'•.
l_
A,in mum Pump Requirements
A(sf) = 525 0.8 0.7 = 840 S.F.
w �+ =
DA DA
n
,
gpd x x
'
'
-
°0,311o,^lamla�'=ao 160 eet
fr✓ ti
i
a
0.35 Gal/S.F./day 14. THE CHAMBERS WILL BE BACKFILLED WITH EXCAVATED MATERIAL VOID OF ROCKS, THE
REVISION
/
EX 1000 GAL, 2-COMP CONC TANK
+ r.a
BACKFILL MATERIAL SHALL NOT EXCEED 2 1/2" DIAMETER AND SHALL BE PLACED TO AT
1
9.5 - ''
...'SiOne y,�, APPROXIMATE LOCATION
Pita ::: .::
1.5" SCHD 40 PERFORATED PVC Number of Quick-4 Infiltrator chambers 4'x3'x12"chambers: LEAST 6 INCHES ABOVE THE TOP OF THE CHAMBERS. THE TOP OF THE PLACED BACKFILL
��
•:": ':
`
rr
DISTRIBUTION LATERAL PIPE = Infiltrator Quick-4 chambe 72 chambers DEPTH OF TOPSOIL IS
840 S F 70 chambers; UseSHALL BE COVERED WITH A LAYER OF FILTER FABRIC A MINIMUM 4"
.� CROWN FIELD TRENCH TO°
l��
1
INSTALL UNDERGROUND ELECTRICAL WIRES
� �
` INSTALL 4" RISER PIPE INSPECTION PORT AT EACH W/ BALLVALVE @ CAP TERMINAL END 12 S.F./Chamber TO BE PLACED ABOVE THE BACKFILL TO THE SURFACE & RE VEGETATED.
-., DIVERT SURFACE WATER
AUTOMATIC DISTRIBUTING VALVE x
:...
FROM HOUSE
ATSERVICE M ELECTRIC DISCONNECT
AT PEDESTAL MOUNT CONTROL PANEL
r••. + END CHAMBER W/ CAP 2" ABOVE SURFACE (TYP.)
_
4-PORT 1.5" TALL ) ORENCO15"
PVC ININSTALL FLUSH BALL VALVE ON END OF EACH
30" DIA, 24" TALL RIBBED PVC DISTRIBUTION LATERAL BELOW EACH INSPECTION REVEGATATION
TOPSOIL LAYER
4' MIN
Number of 5'x3' Bio Diffuser chambers: 15. INSTALLATION OF LEACHING CHAMBERS SHALL BE IN CONFORMANCE WITH THE
700 S.F = 48 chambers; Use 48 chambers MANUFACTURES INSTALLATION INSTRUCTIONS.
l
INSTALL UV 12 GAUGE DIRECT BURY ELECTRICAL/CONTROL
y` RISER W/ LID. INLET SET AT HP. PORT (TYP. END EA. ROW)
'
3' MIN
�
15 S.F./Chamber
INSTALL CHAMBER END CAP
16. THE ABSORPTION TRENCHES/BED OR MOUND MUST BE GENERALLY MARKED AT THE FOUR
WIRES FROM PEDESTAL MOUNT CONTROL PANEL TO
EXTERIOR SPICE BOX ON VAULT RISER.
INSTALL 2-COMPARTMENT 1,000 GALLON CONCRETE SEPTIC/DOSING TANK ON ALL END CHAMBERS BACKFILL LAYERWARM
ONSITE SOILS
,��\//
Use 72 Quick-4 Infiltrator chambers in four trenches 74' long by 3' wide with 18 chambers CORNERS WITH INSPECTION PORTS AND/OR BURIED REBAR. THE FIELDS MUST BE PROTECTED
Jam•
®
t.
RECOMMENDED LOCATION OF CONTROL PANEL BOX. ,
(VALLEY PRECAST ITEM # 1000t 2CP HH) OR ALT. REINFORCED PLASTIC TANK NATIVE
INSTALL WITH (2) 24" DIA. BY 30" DEEP RIBBED PVC RISERS W/ LID AT THE
SURFACE. INSTALL ORENCO BIDTUBE SIMPLEX EFFLUENT PUMP ASSEMBLY. FILTER FABRIC
units per trench plus two end caps as delineated on the plan or equivalent Bio Diffuser chamber FROM VEHICULAR AND LIVESTOCK TRAFFIC.
' 12" MIN. 24" MAX. trenches. The septic tank effluent will be pressure distributed to the head of each chamber row
\ via individual distribution pipes from an ADU pressurized by a head head pump biotube 17. THE ABSORPTION FIELD SURFACES MUST BE SLOPED OR SLIGHTLY MOUNDED TO DIVERT
discharge in dosing 1000 SURFACE DRAINAGE AWAY FROM THE FIELD.
--.N. r
lino what's below.
IN LINE OF SITE W/ TANK. ELECTRICIAN TO INSTALL CIRCUITRY & SET
PANEL IN COORDINATION MANUFACTURER SPECS AND INSTALLER.
(PVU57 1819 L) W/P300511 PUMP), W/ 1.5" DISCHARGE ASSEMBLY.
DEPTH TO TOP OF TANK FROM PROPOSED GRADE IS APPROX. 2.5'.
BACKFILL WITH SCREENED
ONSITE SOILS FREE OF ROCKS
P11411;
assembly a the comparment of the gallon tank.
\\.
LEACHING 18. THE ENTIRE ABSORPTION FIELD SURFACE MUST BE RE VEGETATED.
CHAMBER
19. THE ABSORPTION FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES: 10
feetfrom line.
II before you dig.
-
6^
,i..1 Y �• .e,•'
•" ,5'' + -
any property
25 feet from any potable water supply line.
20 feet from anyoccupied dwelling.
p
CALL 2- USINESS DAYS IN ADVANCE
BEFORE Y DIG, GRADE, OR EXCAVATE
FOR THEM ING OF UNDERGRO
%on' *""C1-
�{� ,
�(` r i' s
k158 •, •
222
page i�
• SCARIFY/TILL BOTTOM SURFACE
TO 3" DEPTH, PLACE 3" SAND &
\ ' \ ' \\• ��
X/\\/\\/ / /�// //� '„ f
/\/\// / /\�\�N
/\\/ 3" CONCRETE SAND
N//\/ //\//\//\//\//\ �.i LEVELING COURSE
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i ' _ • _ '� • r -
_
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+ . �- . .
100 feet from any well, spring or cistern.
100 feet from any stream or water course.
DISTRIBUTION SYSTEM NOTES:
OWTS
„ 20 END PLATE INLET PORT
DESIGN PLAN =;- '. �� ; �� RAKE LEVEL
' CHAMBER UNDISTURBED EARTH
'�_ 1. FILTERED EFFLUENT WILL DISCHARGE VIA A HIGH HEAD PUMP BIDTUBE DISCHARGE
r • . r - ASSEMBLY TO AN AUTOMATIC DISTRIBUTION VALVE BETWEEN THE SEPTIC/DOSING TANK
o
C]r,'•• , l�, LEACHING TRENCH (TYP.)
•'•r • •et \ : CLAY LOAM
_ t AND THE HEAD OF THE CHAMBER TRENCHES.
+ +
z
ash `s' ONAL c�,''�~ CHAMBER TRENCH CROSS SECTION DETAIL
i, r•�r; ' , t }�
2. THE DISTRIBUTION SYSTEM WILL BE INSTALLED TO ALLOW FOR EFFLUENT TO BE(---
+t1ttrr►xl+.`�•i N.T.S.
, • .e
W -
'� r -"�f '• `w ~ 19 ALTERNATELY AND EQUALLY DISTRIBUTED ACROSS THE ABSORPTION SURFACE IN EACH
rw,
0
U
!ENT
7 Dd� Gallon
Top Seam - 2CP
•
-
.� CHAMBER ROW VIA INDIVIDUAL CUSTOM PERFORATED FULL PRESSURE DOSING
?I, '
Z
z
1_
1D00T-2CP-14N with High
Head Pump
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,�`.I�
!I"it"
E IST� G C�IVDI�'�a 5 SUR�TEY
y r DISTRIBUTION LATERALS CONNECTED TO THE HEAD OF EACH CHAMBER ROW INSTALLED
4
1 r + • ON THE SURFACE ALONG THE ENTIRE LENGTH OF THE INDIVIDUAL TRENCH. A BALL VALVE
l r WILL BE INSTALLED ON THE TERMINAL END OF EACH DISTRIBUTION LATERAL CENTERED
Q
J
argil
ail
,e
a
_ 1 BELOW A 4" INSPECTION PORT.
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• Design per performance test per
AST/11 C1227
• Tap surface area acres n°
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View
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III
1111L
-
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• 3. THE MINIMUM SLOPE OF THE TRANSPORT PIPE FROM THE TANK'S DOSING
*
G �_ -y . COMPARTMENT TO THE ADV SHALL BE INSTALLED AT MINIMUM 2.5% UPWARD SLOPE
IL - X...7.TO ALLOW FOR DRAINBACK TO THE TANK. THE INDIVIDUAL DISTRIBUTION PIPES FROM
DX, RE
0 816
10
SYSTEM
ON DOCU
t'c tl 28 days; concrete = 6,000 P51
d
Min.
- Midi Ammo � I.
�
�
.
i
�-..-,•
�
�;, R A 1 � t;.
'L THE ADV WILL CONNECT TO THE DISTRIBUTION LATERAL AT THE HEAD OF EACH TRENCH.
Installation;
. Tank to be set on 5" min. sand
bed or pea gravel
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f
aiiii
r
+.� f , �•!�‘
TESTING, INSPECTIONS AND CONSTRUCTION MANAGEMENT:
• Tank to be hgck}lled uniformly a
all alder In lifts leas than 24" and
Ir.,
' •�-.- ` -r•. �--�1
t-; r..""
To View-V
r
, 1 GRAPHIC SCALE
1 pi, I
'� I I 1 �1
•`
•` (' I {13q{��'ty.
,
�`�k '•'2 12I 1 00,i �i
r chvnic°Ily compacted
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tv
1. ADDITIONAL GEOTECHNICAL EVALUATIONS AND INSPECTIONS BY THE ENGINEER SHOULD BE
J
w
• £rcavoted „taterlal may be used for
SackHll, prowded large manes are 2d'R, Minimum
,-„
. MI.....
-- - �'
i a mil'
l d r,
# ■ I
- +
removed Riser Heigh
• EKcovation should he dewatered and
tank Sled fce water prior to tieing
In l for installation Oink
PVC Enclosure
60a0 5enes
111 '3Q" Diameter Only
1r •
-_- : .--�
�_ -
e t ....r
___
• -- -
� Yam'
' �� ¢ ��•-.
r..n _ ,.
, f I
j �/I
_ +i
g
ply
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k S. le.4 ' l . '[
`. _- . , j -
,t
- -
PERFORMED DURING INITIAL STAGES OF CONSTRUCTION TO VERIFY SOIL CONDITIONS AND
OWTS DESIGN. SUFFICIENT NOTICE TO THE ENGINEER BY THE PROJECT
MANAGER/CONTRACTOR NEEDS TO BE MADE IN ORDER TO SCHEDULE THE SITE
0
L� J
-
Z
w
('
-)
P
CC
pat erwit with
water table lees than 2' below grade
• Meets C1644-06 for rea:1.r t
wrasrora
Vef.o
Stainless
Steel Bolts ..r] inlet & outlet
' w„
~
-�` ,
�J• •
r' a
C
. _ -
a i INSPECTIONS.
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O
C
C
ION CONSTI
_
• net and r Outlet identified chose pipe 000r
Delivered internal
n
, 1.-
"'
h,e 74
and ))methane
Gasket 15
- '100 gpm flowrate
i
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+`'
1 4
.
r g§
+ t,7 I
�I.
a ik_
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r 2. PRIOR TO CONSTRUCTION OF THE PERMITTED SYSTEM THE ENGINEER SHOULD BE
,
U
H
Q
• complete with
•
':Il_:..;- r
_ r
'I
f } •'
>
piping-ignirailMagiter•II
• Control Panpt to be mounted in sight
line of tank
• 4' Maximum bury depth
rl
a
M��
' II
_
Po,pher
alRaa
Recommended Installation
f�
. Hose
Height Varies
/ i Ill
`
, t .'� l 1
:,� . ' ��_: -;
' t ' t,` '
�
t
Ilkf
1 _
i CONTACTED BY THE OWER AND/OR 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
U
Z
N
N z
L�
~
Air Release Valve
---
mi 111'�:
. :I:1,I�
�"'
`
... { ,Dario OF wulrswra�uts Rnerxr
i i '' 1!
`�
�• �• INSPECTION SITE VISITS BASED ON CONSTRUCTION PROGRESS.
Q
Q O
ie•
PVC Enclosure
`++
ALLOWABLE SLAY
t
JY
I
- 7r._p�
�
,
L`11
Mused on Water Table)
LIm
F�i,RI pump
p
lti� `...
_'gal r +l • \1• , •'�,;
t
�y _ 3. COUNTY REGULATIONS REQUIRE THAT THE DESIGN ENGINEER OF RECORD PERFORM SITE
'•
Q
l..l_l
U
WATER TAME
-�
Section
■ �+
^�
1 \ + •• • morns
INSPECTIONS OF THE PERMITTED SYSTEM DURING CONSTRUCTION AND PROVIDE
(�
fl' - or
E
EARTH nu_
s' - fl'
'
View
'�
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1
`'
,..
�� ``'
_ , +' \ �, - -\ t.�curscwsr�RarRrwnseuRrxxaroa.
"AS -CONSTRUCTED" DOCUMENTATION OF THE INSTALLED SYSTEM TO THE COUNTY AFTER
J
J
I- LEI
Q
Or
Gravel Base
Side View �"'�
I •P
,
- --� + ,,n„ ro w w,�„�, SURVEY s„�„r.
y -
.r
CONSTRUCTION IS COMPLETE. THE ENGINEER SHOULD BE CONTACTED AND NOTIFIED OF
J
r^�
1'-9•
3'-9"
I: :'. 41
. •,
1 ' , },
_
L
Z IL
CI-
1
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+\ r" aryea'
\+l '5)PLENo
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fe't
THE CONSTRUCTION SCHEDULE. THE COUNTY ENVIRONMENTAL HEALTH DEPARTMENT
Q
2' - D'
3' - a
,
\ PSSpal,
1 COMER n!°s a"r
`;
l' t +� •`
SHALL CONTACTED
L1J
e Lows end
r
1' �'
s \ �rOP
%_
BE WITHIN 48 HOURS PRIOR TO FINAL BACKFILL TO PERFORM FINAL
DRY
+' - o'
q„
Distributing Valve Assembly !I� , _
t
! I """" i w \ s/ f1NOEROROI11tAw.1TERLOCR1'RDSYOTR665
i1 1 �.- _ ,,
; •. j ;.� ' -t 1 ...r .
�� -
INSPECTION OF INSTALLED COMPONENTS.
RIFLE f
188 CO
Gi
1NSITE WAST
OWTS PERMI.
a CiompleteInrinInion�yiling.,,rlria6
..
l !• r s,nests�snRoe6rrtamorcsswtvsrWAS rRsrvwaawrrxcan-aevePrr
I S'?. OP CVRkeA7[1�MaR7AfF:ATM1R7 rrLe'.. ROT 1aEPkaiM1 ma s,•aRcr+
1
-- �•-' „ ,�,+
' ,• ' 't•,�
mouit0itpanda�ntgploaed►aasy
e 1�to
,�l Discharge Laterals
' : Rl'T1RS ''OR°tz.o°'raPP `•""•`°•M o."�
1 Ir a ' sxw'sxrs•srowx rot�vxnarEowxmeatnr, cuuunrmunramr
r r
- - - y•�
4. OUR DESIGN AND RECOMMENDATIONS ARE BASED OUR SITE ASSESSMENT, SOIL
'Smite on�actsawlMiwlbrmearMiwto�•
-- -----
; _ _
avn
1 •. '. M1 + P -S^ ^E� �
AFAF.C'IYN6 MIS FARCES
y
1' / . iL - -. •'.
,�
EVALUATION AND UPON INFORMATION SUPPLIED TO US BY OTHERS. IF SUBSURFACE OR
Digging Specs Imwrt Dimensions Net Capacity N.t weight
�' ;1
I.
1 seat, ". W. a
O. SITE CONDITIONS ARE FOUND TO BE DIFFERENT FROM CONDITIONS ASSUMED OR
W ACCOR rA'o roCOLUAIp° taw. KW MM. COMMENCE ANY LEGAL
. r ra
urn.
11' Long . 7' Dime Inlet Outlet Length width Height inlet Side Outlet Total Lid Tank Total
■ ■
TransportLine
J` 11
AFTER at1En!MEW AN EFECTRli1RCTINP TURES MARS
'w+•"•a AFTER ronsmsr cw+.rovax !VCR t�ssacr. In PO LYFxr xnrM1rrYAcraa.
ti } R-�t.70.6ANT St:rDATSt ISSURVEYEt r,a^..N-enrae>arr+1.1+
. • - ia. INDICATED, WE SHOULD BE NOTIFIED TO EVALUATE ANY EFFECT ON THE PROPOSED OWTS.
+ ` IF THE COUNTY REQUESTS CHANGES OR MODIFICATIONS TO THIS DESIGN, WE SHOULD BE
5S' bald. inlet 5S" Secr73" fir 50• 92" Bel gal 323 gal 1010 col 2820 Iba 0350 Ibs inoa IL=_
I
1
_ E0J
I .-. ` MN YEARS FROM MEns'+s Or•LEFRFIG1 rraA•slmwv lSFltSON
`�-•
4'
Q
"•-_ L `, CONTACTED TO EVALUATE AND RESPOND TO THE REQUEST.
•� ' L �'r •� 11
-; ..
-
1,_., ' sunv�roessrAren+sm
$
R041 33'50 - Rrt: 5. CONTRACTOR SHOULD REVIEW ANY CONDITIONS ON THE ISSUED PERMIT AND COORDINATE
r
21.2( I-1-1tlil;{'i - , F WITH THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM.
Phone: 71a• 67U
{ l VALLEY »ern
fl PRECAST inc. Minn.: y aw.
t, J. a,$. tF6, ;i:. � r r;> 1
DoSi Dosing k rr�uwsarlrissnravP•
srlawxrrerraoa+weS...:. n sner>:_
(IP,1¢0R amen Yr„.5 .T.. •,;,eRM1,yn vom I1 rxernasrwtsA
\ i,.. TRUERRIRRBRATAVON • . Sr
&J
g °
r
�' - 1 6. IF YOU HAVE ANY QUESTION OR NEED ANY ADDITIONAL INFORMATION, PLEASE CALL PAUL
J
O
frafildeskiteialoyprecaeLcarri
Buena Vista, Colorado motfigure
-_
4:
rQCHA6LJ. '.' r: CAxCw.ar]RRW3lR4naa NO. 3e572
y. _- RUTLEDGE AT SOPRIS ENGINEERING, 704 0311.
, ..
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r a a a t'''''' ! r'4y3EIPVECEa MC.
PER -w
VA'
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Ifiat
.
_/,,••�' -
DATE: 11 - 30 - 2020
aa• •e
',''- '
6000 SERIES AUTOMATIC DISTRIBUTION VALVE
Dale }>
DOSING TANK PUMP ASSEMBLY DETAIL
�a..a
a1�,o-a
JOB NO. 30211.01
N.T.S.
VINCINITY AERIAL MAP
ALTERNATIVE: USE PLASTIC ROTH TANK
N.T.S. PREVIOUS SURVEY PLAT G:\2020\30211-WILCOX\CIVIL\CIVIL DWGS\DE\30211-DE-OWTS PLANDW&FO R U3Iei E, 2020 - 7:18am
SHEET C-1