HomeMy WebLinkAboutOWTS Design 08.10.2022l(trt Kumar & Associates, lnc.@
Geotechnical and Materials Engineers
and Environmental Scientists 5020 County Road 154
Glenwood Springs, CO 8160'1
phone: (970) 945-7988
fax: (970)945-8454
email : kaglenwood@kumarusa.com
An Employcc Owncd Compony www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Gollins, Glenwood Springs, and Summit County, Colorado
ONSITE WASTE\ryATER TREATMENT SYSTEM DESIGN
EXISTING RESIDENCE
HOMESTEAD 49, PANORAMA RANCH
335 ELK RANGE ROAD
GARFIELD COUNTY, COLORADO
PROJECT NO. 22-7-103
AUGUST 10,2022
PREPARED FOR:
ASHLEY BEAN AND JERRY DOUGHTY, JR.
P. O. BOX 1087
CARBONDALE, COLORADO 81623
@
TABLE OF CONTENTS
INTRODUCTION
PROPOSED CONSTRUCTION
SITE CONDITIONS.
SUBSURFACE CONDITIONS
OV/TS ANALYSIS
DESIGN RECOMMENDATIONS ....
SOIL TREATMENT AREA............
OWTS COMPONENTS ........
OV/TS OPERATION AND MAINTENANCE.....
OWTS HOUSEHOLD OPERATION
OWTS MAINTENANCE
OWTS CONSTRUCTION OBSERVATION
LIMITATIONS..
FIGURES
FIGURE 1 _ OWTS SITE PLAN
FIGURE 2 _ USDA GRADATION TEST RESULTS
FIGURE 3 _ SOIL TREATMENT AREA CALCULATIONS
FIGURE 4 _ SOIL TREATMENT AREA PLAN VIEW
FIGURE 5 - SOIL TREATMENT AREA CROSS SECTION
ATTACHMENTS
VALLEY PRECAST I,OOO GALLON, TWO-CHAMBER SEPTIC TANK DETAIL
TUF-TITE 4-HOLE DISTRIBUTION BOX
1
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1
1
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4
7
7
8
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Kumar & Associates, lnc.Project No. 22-7-103
INTRODUCTION
This report provides the results of an onsite wastewater treatment system (OWTS) design for the
existing residence located at Homestead 49, Panorama Ranch, 335 Elk Range Road, Garfield
County, Colorado. The purpose of the report is to provide design details for the OWTS in
accordance with the Garfield County Environmental Health Department Onsite Wastewater
Treatment System Regulations and the Colorado Department of Public Health and
Environmental Regulation#43. The services were performed in accordance with our agreement
for professional services to Ashley Bean and Jerry Doughty, Jr. dated January 4,2022.
PROPOSED CONSTRUCTION
The existing residence is a single-family structure located on the lot as shown on Figure 1. The
residence will be remodeled. The new OWTS for the residence will be designed for a total of
three bedrooms. The soil treatment area (STA) for the OV/TS will be located to the south of the
residence as shown on Figure 1. Water service is provided to the residence by a public source
from Elk Range Road, north of the residence.
If proposed construction is different than that described, we should be contacted to re-evaluate
our design recommendations.
SITE CONDITIONS
The site is occupied by a single family, two-story residence located as shown on Figure 1. The
terrain is generally moderately to strongly sloping down to the southwest. The existing STA was
not able to be located and the type, size and condition are unknown. An irrigation ditch is
located to the south of the proposed STA, see Figure 1. Vegetation consists of sage brush, oak
brush, grass and weeds.
SUBSURFACE CONDITIONS
The field exploration for the OWTS was conducted on May 3, 2022. Two profile pits (Profile
Pits 1 and2) were excavated with a backhoe at the approximate locations shown on Figure 1 to
evaluate the subsurface conditions for the planned new soil treatment area for the OWTS. The
pits were logged by a representative of Kumar & Associates. Logs of the profile pits are
provided below.
Kumar & Associates, lnc,Project No.22'7-103
Depth USDA Classification
0-2'TOPSOIL; organic Loam, firm, moist, dark brown.
2',-\',SANDY LOAM; gravelly, rnoderately blocky structure, very stiff, moist, pale
brown.
o
o
a
Disturbed bulk sample obtained"from 3 to 4.þet depth.
Bottom of pit @ I feet.
No groundwater or redoximorphic features observed at time of pit excavation
a
Log of Profile Pit 1
Log of Profile Pit 2
The soils encountered in profile pits, below about 2 to 2'/z feet of organic topsoil, consisted of
gravelly Sandy Loam down to the pit depths of 8 feet. Hydrometer and gradation analyses were
performed on a disturbed bulk sample of the soils from Profile Pit 1 from 3 to 4 feet depth with
the results provided on Figure 2. The tested sample (minus No.10 size sieve fraction) classifies
as Loamy Sand per the USDA system. No free water was encountered in the pits nor indications
of seasonal high groundwater were observed at the time of the pit excavations.
Based on the subsurface conditions and laboratory testing, the soils at the STA have been
classified as Type 2 per State regulations, which equates to a long-term acceptance rate (LTAR)
of 0.60 gallons per square foot per day.
DISCUSSION
The existing OV/TS for the residence appears to be installed in about 2005 and is undersized for
the additional bedroorns based on current regulations. The existing septic tank should be
inspected to determine if suitable for re-use in the new system. If the septic tank is replaced, the
existing tank should be removed or abandoned per County regulations, and all existing sewer and
effluent lines should also be abandoned with the lines removed or capped at each end.
OWTS ANALYSIS
Based on the sitc conditions and profile pit evaluations, the evaluated area should be suitable for
a conventional infiltration disposal system. There is adequate elevation difference from the
basement level ground floor of the residence down to the STA for gravity flow of the sewer
Depth USDA Classification
0-2Y2'TOPSOIL; organic Loam, firm, moist, dark brown.
2/2'-8'SANDY LOAM: gravelly, moderately blocky structure, very stiff, slightly moist,
pale brown.
a
a
Bottom of pit @ 8 feet.
No grounù,vater or redoximorphic.features observed at time of pit excavation.
Kumar & Associates, lnc,Project No.22-7-103
-3-
effluent. The STA will consist of chambers in a trench configuration based in the Sandy Loam
soils. The STA will be sized for three bedrooms (six persons) and an average daily flow of
75 gallons per person, and an LTAR of 0.60 gallons per square foot per day for the natural Loam
soils.
The effluent will gravity flow from the residence to the septic tank for primary treatment and
then gravity flow to the STA for dispersal and f,rnal treatment. The STA will consist of three
trenches with Infiltrator Quick 4 Plus Standard chambers. Equal distribution will be provided to
the chambers and trenches by a distribution box.
There are no known water supply lines in the vicinity of the proposed STA. The required
setback to the water supply line from the septic tank is 10 feet, 5 feet for sewer and effluent lines,
and25 feet from the STA. We should be notified for additional recommendations if the water
supply line is within these minimum setbacks. The setback for the STA to the inigation ditch is
50 feet.
DESIGN RECOMMENDATIONS
The design recommendations presented below are based on the proposed construction, the site
and subsurface conditions encountered and our experience in the area. A layout of the proposed
OWTS components is provided on Figure 1. If conditions encountered during construction are
different than those that are described in this report, we should be contacted to re-evaluate our
design recommendations.
SOIL TREATMENT AREA
o The STA will consist of three trenches with 15 Infiltrator Quick 4 Plus Standard
chambers placed in each trench (45 chambers total) in the native soils. Equal distribution
will be provided to the trenches by a distribution box.
o The STA was sized based on an LTAR of 0.60 gallons per square feet per day.
o Each chamber was allowed 12 square feet of area. A30% reduction of the STA size was
applied for use of Infiltrator chambers in a trench configuration. The total STA design
size is 540 square feet. Soil treatment area calculations are shown on Figure 3.
o A minimum of four feet of undisturbed soil between trenches is required.
o Trench cut depths should be a maximum of 3 feet deep.
o The trenches should be oriented along ground contours to minimize soil cut and cover.
o The base and sidewalls of the trench excavations should be scarified prior to the chamber
placement.
Kumar & Associates, lnc.Project No. 22-7-103
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o A minimum of 12 inches and a maximum of 24 inches of cover soil should be placed
over the chambers.
o Backfill should be graded to deflect surface water away from the STA and should be
sloped at3 horizontal to 1 vertical or flatter. A swale to divert surface water flow away
from the STA may be needed along the upslope side.
o Disturbed soil should be re-vegetated as soon as possible with a native grass mix. No
trees, shrubs or other plants with deep roots should be planted on or near the STA as this
may damage the system piping.
. Four-inch diameter inspection ports should be installed vertically into the knockouts
provided in the chamber end caps. Install ports at each end of the trench. The inspection
port piping should be screwed into the top to the chambers and should not extend down to
the ground surface inside the chambers. The inspection ports should extend at least
8 inches above the finished ground surface or be protected in a valve box at finished
grade.
o The STA must be a minimum of 25 feet from any potable water supply lines.
o The STA must be a minimum of 50 feet from the irrigation ditch.
o The STA must be a minimum of 5 feet from the septic tank.
o A plan view of the STA is presented on Figure 4 and a cross section of the STA is
presented on Figure 5.
o If during the construction of the new STA, the existing STA is located, we should be
contacted for additional recommendations.
OWTS COMPONENTS
Recommended OWTS components provided below are based on our design details and our
experience with the specific component manufacturers. Equivalent components may be feasible
but need to be approved by us prior to construction.
Septic Tank
o The existing septic tank should be inspected to determine if it should be replaced.
o A Valley Precast 1,000 gallon, two-chamber septic tank should be used for primary
treatment. A detail of the tank is provided as an attachment.
o An equivalent poly/plastic tank may be used. We should be contacted for approval of an
altemate tank prior to installation.
o An effluent filter should be installed in the tank outlet tee.
o The tank must be a minimum of 5 feet from the residence.
o The tank must be a minimum of 10 feet from any potable water supply lines.
Kumar & Associates, lnc,Project No. 22-7-103
5
o The tank must be set level. The excavation bottom must be free of large rocks or other
objects that could damage the tank during placement. A road base or gravel bedding
material may be needed to prevent tank damage during placement and act as a leveling
course.
o The tank lids must extend to final surface grade and made to be easily located.
o Install the tank with2 feet minimum cover soil for frost protection. Maximum tank soil
cover is 4 feet.
o If the septic tank is replaced, the existing septic tank should be abandoned per Garfield
County regulations.
Sewer Pipe
o The location and condition of the existing sewer line to the tank should be evaluated at
the time of construction and replaced as needed.
o The sewer line to the septic tank should not be less than the diameter of the building
drains and not less than 4 inches in diameter.
o The sewer pipe should have a rating of SDR35 or stronger. Schedule 40 PVC pipe is
required beneath any driveway surfaces.
o The sewer pipe should be sloped between 2Yo to 4o/o to help limit disturbance of solids in
the tank and potential sewage bypass of the first chamber of the tank. If a steeper slope is
needed, this can be accomplished with vertical step-downs in the sewer line.
o A minimum 24 inches of cover soil should be provided over the sewer pipe. Paved areas,
patios or other areas without vegetative cover may be more susceptible to frost and we
recommend 48 inches of soil cover over the sewer pipe in these areas, and the pipe be
insulated on top and sides with 2-inch-thick blue foam insulation board. If adequate soil
cover is not possible, we should be contacted for re-evaluation prior to installation.
o The sewer pipe should be bedded in compacted3/o-inchroad base or native soils provided
that the native soils contain no angular rocks or rocks larger than2lz-inches in diameter
to help prevent settlement of the pipe. Sags in the pipe could cause standing effluent to
freeze and damage the piping.
o Install cleanout pipes within 5 feet of the building foundation, where the sewer pipes
bend 90 degrees or more and every 100 feet of sewer pipe.
. All 90-degree bends should be installed using a 90-degree long-sweep or by using two
45-degree elbows.
o The sewer line location shown on Figure 1 is considered conceptual. 'We assume that
there will be only one sewer line exiting the residence. It is the responsibility of the
Kumar & Associates, lnc.Project No. 22-7-103
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owner/contractors to locate all sewer line exit locations and connections to the septic
tank. V/e should be notified if there are other sewer lines exiting the building.
Effluent Transport Piping
o The effluent transport pipe should be 4-inch diameter SDR35 piping sloped at a2o/o
minimum to flow from the septic tank to the distribution box and from the distribution
box to each trench. Piping should extend at least 6 inches into the top knockout provided
in the Infiltrator end caps and be screwed in place. Splash plates should be installed
beneath the inlet piping to help limit scouring of the infiltrative soil surface in the
chambers.
o The effluent transport pipe should be bedded in compacted34-inch road base or native
soils provided that the native soils contain no angular rocks or rocks larger than
2/z inches in diameter to help prevent settlement of the pipe. Sags could cause standing
effluent to freeze and damage to the piping.
o A minimum 18 inches of cover soil should be provided over the effluent transport pipe.
Paved areas, patios or other areas without vegetative cover may be more susceptible to
frost. We recommend 48 inches of soil cover over the effluent pipe and insulation with at
least2 inches of rigid foam insulation in these areas. If adequate cover soil is not
possible, we should re-evaluate the condition prior to installation.
o Schedule 40 PVC pipe is required underneath driveway surfaces and should be provided
with at least 48 inches of soil cover, and be insulated on top and sides with 2-inch-thick
rigid foam insulation board.
o All 9O-degree bends should be installed using a 90 degree long-sweep or by using two
45-degree elbows.
Distribution Box
o The distribution box will be used to equally divide effluent flow between the trenches.
We recommend the Tuf-Tite 4-Hole Distribution Box since it is easily accessible from
ground surface for maintenance. A copy of the distribution box detail is provided as an
attachment to this report.
. The dístribution box outlet pipes should be equipped with Tuf-Tite speed levelers for ease
of initial setup and adjustment over time.
o The distribution box should be a minimum of 18 inches below grade with risers and an
access lid at or above grade.
. The distribution box must be accessible from ground surface for inspection and
maintenance per the State guidelines.
Kumar & Associates, lnc.Project No.22-7-103
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a The effluent line from the septic tank should be directed downward into the distribution
box with a 90-degree elbow inside the box.
The distribution box must be installed level on a compacted road base subgrade to ensure
equal effluent distribution. If settlement of the distribution box occurs, unequal effluent
distribution may take place which could cause hydraulic overload of one of the trenches
and potential failure. The distribution box should be monitored periodically, and the
speed levelers should be adjusted as necessary for levelling.
The ground surface above and around the distribution box should be graded to drain away
surface water to prevent standing water near the distribution box which could freeze or
cause settlement.
a
O\ilTS OPERATION AND MAINTENANCE
The OV/TS will require periodic inspection and maintenance to function properly. A properly
designed, installed and maintained system can greatly increase its lifespan. The level of
maintenance will vary depending on the complexity of the system and water use habits of the
residents. We recommend that an O'WTS Operation and Maintenance (O&M) Manual be
developed. Depending on the complexity of the system, a contract with an OWTS maintenance
provider may be prudent. Below are some basic recommendations for the OWTS O&M.
OWTS HOUSEHOLD OPERATION
o Use of high efficiency water fixtures is recommended to decrease the hydraulic load on
the OWTS system.
o Fix plumbing leaks immediately as this may cause a hydraulic overload of the soil
absorption system.
o Do not irrigate the arca on top of or directly upgradient of the soil absorption field as this
may cause a hydraulic overload.
o Do not dispose of household waste down drains as this may clog or damage OV/TS
components. Examples of household waste includes: dental floss, cotton swabs, coffee
grounds, paper towels, feminine products and many other kitchen and bath items.
o Use of kitchen garbage disposals is not recommended. If a garbage disposal is utilized,
kitchen wastewater should be screened thoroughly. Many kitchen solids are not
decomposed in the septic tank and may cause increased tank pumping frequency.
o Do not dispose of household chemicals, greases, oils, paints, hot tub water or water
softener backwash in household drains. A separate drywell, if feasible, may be necessary
for hot tub water or water softener backwash disposal.
Kumar & Associates, lnc.Project No. 22-7-103
-8-
Limit the use of bleach as this may harm useful bacteria in the septic tank and soil
absorption system.
Liquid dishwasher and clothes washer detergent is recommended for households served
by an OV/TS. Clay substances used as fillers in powder detergents may result in
clogging of the soils absorption system.
OWTS MAINTENANCE
Inspect the septic tank, distribution box and STA at least annually for problems or signs
of failure.
The effluent filter for the tank should be cleaned at least annually by spray washing solids
into the first chamber of the septic tank.
The septic tank should be pumped and cleaned every 3 to 5 years depending on use.
Longer pumping intervals may increase the amount of solids that reach the STA, which
may shorten its life span.
Pumping of the septic tank should take place when the level of the sludge and scum
layers combined take up 25 to 33Yo of the capacity of the f,rrst chamber of the tank.
o
a
o
a
a
O\ryTS CONSTRUCTION OBSERVATION
The Garfîeld County Environmental Health Department requires that the designer of the system
provide a record drawing and certification of the OWTS construction (As-Built inspection).
We should be provided with at least 48-hour notice prior to the installer needing the inspections.
Prior to issuance of our certification letter, we require observation of all system components
prior to backfill. The number of site visits required for the inspection will depend on the
installer's construction schedule.
LIMITATIONS
V/e have conducted this design in accordance with generally accepted engineering principles and
practices in this area atthis time. 'We make no warranty either expressed or implied. The
recommendations provided in this report are based on the site conditions, profile pit evaluations
and soil texture analysis, the proposed construction and our experience in the area. Variations in
the subsurface conditions may not become evident until excavation is performed. If conditions
encountered during construction appear different from those described in this report, we should
be notified so that re-evaluation of the recommendations may be made.
This report has been prepared for the exclusive use by our client for design purposes. We are not
responsible for technical interpretations by others of our information. As the project evolves, we
Kumar & Associates, lnc.Project No.22-7-103
-9-
should provide continued consultation and field services during construction to review and
monitor the implementation of our recommendations, and to veriff that the recommendations
have been appropriately interpreted. Significant design changes may require additional analysis
or modifications to our design.
It is our opinion that the designed location of the OWTS components does not violate any
setback requirements of the current Garfield County Regulations. Below is a table of common
minimum horizontal setbacks to OWTS components. Refer to the Garfield County Regulations
for a complete list of required setbacks. 'we recommend the owTS component locations be
surveyed by a Professional Colorado Land Surveyor'
Table 1 - Common Minimum Horizontal Setbacks from OWTS
please contact us for any necessary revisions or discussion after review of this report by Garfield
County. If you have any questions, or if we may be of further assistance, please let us know'
Respectfully Submitted,
Kumar & Associateso [nc.
Shane M. Mello, Staff Engineer
Reviewed bY:- -_l
David A. Young,
SMM/kac
Cc: Peak
Septic
Tank
Dry
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Irrigation
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25',t550'10'20'25',100'STA
10'50'10'l0')550'Septic Tank
l0'50'10'0'50'5',Building
Sewer
Kumar & Associates, lnc'
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Project No. 22-7-103
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PROPOSED SOIL TREATMENT AREA
(srA) coNSrsTrNG 0F 3 ROWS OF5 INFILTRATOR QUICK4 PLUS
STANDARD CHAMBERS 50.0'
SETBACK
IRRIGATION
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Fig. 1Kumar & Associates OWTS SITT PLAN22-7 -103
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ro0
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60
50
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to
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30
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50
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.005 .oo9
DIAMETER OF PARTICLES IN MILLIMETERS
CLAY COEBLES
.002 mm .02 .05 .l
SAMPLE OF: GRAVELLY LOAMY SAND
FRoM: PROFILE PIT 1 AT 3 TO 4 FEET
,5 1 2mm 20 76
ENTIRE SAMPLE
PARTICLE SIZE DISTRIBUTION %
COBBLES 0
GRAVEL 29
SAND 55
SILT 16
CLAY 2
PORTION OF SAMPLE
PASSING #10 SIEVE
PARTICLE SIZE DISTRIBUTION %
SAND 75
SILT 22
CLAY 5
TOTAL SAMPLE RETAINED ON ¡fl0 SIEVE: 29%
GRAIN SIZE
(..n')
TIME PASSED
(min)% FINER
0.057 18
0.019 4 12
0.009 19 6
0.005 60 5
0.002 455 2
0.001 1 545 2
PERCENT OF MATERIAL RETAINED ON #10 SIEVE
PASSING 3/4" SIEVE: 38%
NOTE: Hydromeler Anolysis wos performed on o
bulk sompls following screenlng of oll moteriol
lorger lhon the f10 sieve (2.0 mm) per USDA
guidelines,
Thsss losl rssulls opply only lo lhe
somplos which w€r6 l€sl€d, Ths
l€sllng roporl sholl noi bo reproduced,
6xc6pl l¡ full, wllhoul lh€ wrlllonqpprovql of Kumqr & Assoclql€s, lnc.
slov€ onolysls l€sllñg ls performed ln
qccordqnoe with ASTM 0,122, ASTM C156
ond/or ASÍM 01140.
HYDROMETER ANALYSIS SIEVE ÂNÁLYSIS
U.S. STANDARD SERIES CLEAR SQUARE OPENINGS
. /en 1/^ô 1 I /tn24 HRS 7 HRS
lMIN¡i
fIME READINGS
6ôUlN rEV|N 4MtN
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SAND GRAVELSILI
V, FINE FINE N4EDIUIV co v co.FINE MFDIJM COARSFFINEco.
GRAIN SIZE
(,.n.)SIEVE SIZE % FINER
127.00 5"100
76.00 3"100
58.1 0 1-1 /2"91
19.05 s/4"8Z
9.50 3/8"7A
4,75 *4 75
2.O0 *10 71
1.00 #18 65
0.50 #35 57
0.25 #60 47
0.1 06 li1 40 34
0.053 *270 1E
22-7 -103 Kumar & Associates USDA GRADATION TEST RISULTS fig. 2
OWTS SOIL TREATMENT AREA CALCULATIONS
In accordance with the Garfield County OWTS Regulations and the Cobrado Depaftment of Publb Health
and Environment's Regulation #43, the soiltreatment area was cabulated as follor¡s:
CALCULATION OF OWTS DESIGN FLOW:
Q = (FXN)
N = 2 PERSONS PER BEDROOM FOR FIRST 3 BEDROOMS
WHERE:
Q = DESIGN FLOW
F = AVERAGE FLOW PER PERSON PER DAY
B = NUMBER OF BEDROOMS
N = NUMBER OF PERSONS
þ=
$=
J\=
Q=
75 GALLONS PER DAY
3 BEDROOMS
6 PERSONS
450 GALLONSPERDAY
CALCULATION OF OWTS SOIL TREATMENT AREA:
M¡NIUMUM TREATMENT AREA = g + LTAR
WHERE:
Q=
LTAR (SOIL TYPE 2) =
450 GALLONS PER DAY
0.6 GALLONS/FTTDAY
MINIMUM SOIL TREATMENTAREA =750.0 SQUARE FEET
REDUCTION FACTOR FOR CHAMBERS =0.70
MINIMUM SOIL TREATMENT AREA WITH REDUCTION =525 SQUARE FEET
AREA PER INFILTRATOR QUTCK 4 STANDARD CHAMBER =
TOTAL CHAMBERS NEEDED =
12 SQUARE FEET
44 CHAMBERS
NUMBER OF TRENCHES =
CHAMBERS PERTRENCH =
TOTAL NUMBER OF CHAMBERS AS DESIGNED =
3 TRENCHES
15 CHAMBERS
45 CHAMBERS
TOTAT SOII TREATMENTAREA =s40 SQUARE FEET
22-7-103 Kumar & Associates SOIL TREATMTNT ARIA CALCULATIONS Fig. 3
4INCH DIAMETER
NON-PERFORATED
SDR55 TRANSPORT
PIPE SLOPED AT
A 2% MIN. DOWN
TO DISTRIBUTION
BOX,
TRANSPORT PIPING SHOULD BE
INSERTED AT LEAST 6 INCHES
INTO THE UPPER KNOCKOUT IN
THE END CAP. INSTALL SPLASH
PLATES BENEATH INLET PIPING
TO HELP LIMIT SCOURING OF THE
INFILTRATIVE SURFACE.
TUF-TITE 4-HOLE
DISTRIBUTION BOX
4INCH DIAMETER
NON - PERFORATED
SDR55 TRANSPORT
INFILTRATOR QUICK4 PLUS
STANDARD CHAMBERS IN 3
TRENCHES. 1 5 CHAMBERS
PER TRENCH (45 TOTAL).PIPE SLOPED A
A 2% MIN. DOWN
TO TRENCH.
INFILTRATOR QU¡CK4 PLUS STANDARD
END CAP.
4 INCH DIAMETER PVC OBSERVATION
INSTALLED VERTICALLY INTO THE KNOCKO
PROVIDED IN END CAPS. INSTALL PORÏS AT
EACH END OF EACH TRENCH. REMOVABLE
LID TO BE PLACED ON TOP OF PIPE. PIPE
MUST STICK UP AT LEAST 8 INCHES ABOVE
FINISHED GRADE OR BE PLACED AT GRADE IN
AN ACCESSIBLE VALVE BOX. PIPES SHOULD
NOT EXTEND TO SOIL SURFACE AND SHOULD
BE SECURED TO CHAMBER WITH SCREWS OR
COUPLINGS TO PREVENT SLIDING DOWNWARD.
1 10 20
SCALE_ FEET
Notes:
1. Chambers should be installed level on a scarified ground surface, Concrete sand may be used as a leveling course if
necessary,
2. Care should be taken by the contractor to avoid compaction of the native soils in the trench areas, The base and side walls of
trench excavations should be scarified prior to chamber installation.
3. All piping should have a rating of SDR35 or stronger.
4. Changes to this design should not be made without consultation and approval by Kumar & Associates.
5, Refer to the Garfield County Onsite Wastewater System Regulations for other applìcable specifications.
22-7 -103 Kumar & Associates SOIL TREATMENT AREA PLAN VIEW Fig. 4
Native Soil
4 rn
ndistu
Tren
Soil
Between
12" min. 24" max.
Cover Soil Graded
to Deflect Surface
Excavate 36"
Wide Trench
lnfiltrator Quick 4 Plus
Standard Chamber
lnstalled Level
Water
Approx.Existing Ground Surf ace
Scarify ground surface prior
to chamber placement,
Notes
1 Chambers should be installed level on a scarified ground surface, Concrete
sand may be used as a leveling course if necessary.
Care should be taken by the contractor to avoid compaction of the native soils in
the trench areas. The base and side walls of trench excavations should be
scarified prior to chamber ¡nstallation.
Changes to this design should not be made without consultation and approval
by Kumar & Associates.
2.
2.5 0 2.5
SCALE_ FEET
Ã
J
22-7 -103 Kumar & Associates SOIL TREATMENT AREA CROSS SECTION Fig. 5
IOOO Gallon Top Seam -zCPlbm #
looor-2cP
11 Top
View
DESIGN NOTES¡ Design per performonce test per
ASTì/ C1227
. Top surfoce oreo 46.25 ft2o fc @ 28 do)æ; concrete : 6,000 PSI
Min.
lnstollotion:o Tonk to be set on 5" min. sond
bed or peo grovelo Tonk to be bockfìlled uniformly on
oll sides in lifts less thon 24' ond
mechonicolly compocted¡ Excovoted moteriol moy be used for
bockfill, provided lorge stones ore
removed¡ Excovotìon should be dewotered ond
tonk filled with woter prior to being
put in service for instollotion with
woter toble less thon 2' below grode¡ Meets C1644-06 for resilient
connectors¡ lnlet ond Outlet identifìed obove pipe¡ Delivered complete with internol
piping¡ 4' Moximum bury depth
f -.-1.-'J '.---i,¡-:.'
ClcerAccæ
TAI{K
ID
:¡
b Gnade
Fle¡dble Rubber
Sealant
.l
1':
in
Section
View
Digging Specs
11' Long x 7' Wide
56" below inlet
ilnl
vert Dimensions Net Weight
Tonk
bsl
:
et,Width ' Height Totol
l
Totol
68"687 gol 323 soli
:
1010 9ol ; 2620 lbs 9380 12000 I
ALLOWABLE BURY
(Bosed on Woter Toble)
WATER TABLE ALLOWAtsLE
FÂRTI.{ FII I
0'-0"2'- 0'
't' - 0"3'- 0'
2'-O"3'- 0"
3'-0"4'- O'
DRY 4'-O'
1
Phone: 719€956764
Faxz 719-3W37Zl
Webclb: wìr,vt .vallê)Dr€castærn
Ennll : fronUeok@n¡alleyprccastæmBuen¡ Vlrta, Colorado
PRTCASI¡Inc.
Tough Problem
Providing a simple, reliable, and
permanent means for dividing septic
tank effluent flow.
TUF-TITE Solution
A shong, stable, permanent,
non-conosive Tuf-Tite Distribution
Box, with a Tuf-ïite Speed Leveler
in each outlet.
I lnjection molded HDPE
I Non-corrosive
I Simple to install
I Easy to level
ln a septic environment, no other
material can match High Density
Polyethylene in delivering a lifetime
of trouble-free service. Tuf-Tite
Distribution Boxes are injection
molded, using only premium HDPE
which contains no fillers or foam.
Snap-in p¡pe seals
They're patented. Simply insert your
PVC pipe and push it through the
flexible, polyethylene Tuf-Tite seal,
Pipes fit watertight, lnstallation couldn't
be easier.
They're permanent
Unlike cement-based pipe grout,
Tuf-Tite seals will not crack or corrode
in septic conditions. They stay pliable
and watertight permanently.
.TUITITE^ 4-Hole D¡stribution Box 4HD2
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INSTALLATION IS
JUST THIS SIMPLE
1. Position the Distribution Box
on level virgin soil.
Do not p¡ace box on a
concrete slab.
2. lnstallthe inlet pipe and
outlet pipes. Be sure the
bottoms of all pipes rest on
virgin soil.
3. Levelthe Distribution Box
and all pipes as needed.
4. Backfill the pipes to within
two feet of the Distribution
Box. Recheck the level of the
box, then backfill up to the
top lid ridge.
5. lnstall and adjust Tuf-Tite
Speed Levelers.
6. Place lid on the Distribution
Box and finish backfilling.
Choice of Fittings
S-35 Pipe Seal, for:
I Sewer and Drain
r SDR 35 T ASTM 3034
I Thin Wall I 1500 Lb. Crush
S-40 Pipe Seal, for:
I Schedule 40
I 4" Corrugated
P-10 Plug, for unused holes
Ghoice of Lids
Regular Lid. Molded of rugged
HDPE.
lnspection Port Lid. For easy
access and inspection. Models
available to accept either 4" or
6" extension pipes.
Tuf-Tite Speed LevelersTM
Control the flow of effluent from
the Distribution Box. Simply
insert a Speed Leveler into each
outlet pipe. Rotate each Speed
Leveler so the flow is distributed
as desired. Available for 3" or 4"
PVC pipe.
.TUF.TITE"
Drainage and Septic Products
Tuf-Tite@ Goryoration
1200 Flex Court
Lake Zurich, lllinois 60047
o1 999 Tuf-Tite@ corporation
A full line ot
innovations for
betterseptic
systerns
Form 4HD2-3. Pr¡nled in USA