HomeMy WebLinkAboutPlansRegrade above leach field to direct all.
surface flow away from field.
Proposed .._.
Infiltration Area
INSPECTION PORT (TYP)
Well with
100' Radius
48 QUICK4
INFILTRATOR UNITS
SCR
SEWER PPE •
Water Line
New force main sewer, 1 Purecor or HDPE SDR17
continuos, 3 ft bury depth, encase in 4" sewer pipe
1 O'each side of water line crossing from well. Provide
positive slope from pump to distribution box
Approx Property Boundary
New Concrete pump pit with lift pump
Existing
Septic Tank
1
Existing
Leach Field, unknown
extents, disconnect from
septic tank, leave for
future exploration
ti
QRAF131C SCALE DI FEET
1
Site Pian
SCALE,: 1 " 100'
Double or Bidirectional Clean—Out
w/Removable Cap as per local code.
8"tyP•_
4" SDR 35 Sewer Pipe
(min. Slope = 2Z)
6" Cl. 6 Bedding
Graded Level Compact
Base to 95% Modified
Proctor Density
Note; Tank is existing, volume to be
verified that 1250 gallons exists, this
detail is provided in the event new
tank is required or secondary tank is
used as pump vault
4.00
Finish Grade
Conc. Cover (Typ)
20"0 Riser Sections
Inlet Invert shall be
at least 3" Higher than
the Outlet Invert
(Typ)
4" SDR 35 Sewer Pipe_
To Distribution Box
(min. Slope = 2%)
These drawings have been prepared for the then
identified on the design sheet titleblock. Unless
these drawings bear a signed engineers seal,
they may be used only at owners sole risk.
Electric by others, recommend
high level alarm float with
7 -
alarm on box or in house
r
Stub old 4"
line to old
leach field
into pi, cap
14" min.
Zabel Outlet Filtr
or approved equ'l
Concrete vault, optional manhole or secondary septic tank
can be used, install same as septic tank details
Plumbing details for connection type and service
aspect to be determined between owner and
contractor
ypical Concrete --Detail
SCALE: N.T.S.
D
High
level
alarm
3' Min
.5' Min
Force main, continuous
piece of HOPE or Pure
cor, 1" minimum
48" Concrete Manhole
Cone Supported on
Concrete Block
Concrete Block
as necessary
4' SDR 35 Sewer
Pipe to Trenches
6'
Concrete
Distribution Box
-may■��1.=f
24" Approx
8 Hole Conc. Distribution Box
w/ Baffle. Bed on 6" Cl. 6 Base Course
Compact Base to 95% Modified Proctor.
Standard 48" MH Section
w/Cover supported on
concrete blocks.
5 1.f. 4" SDR 35 Pipe,
or SCH 40, adapt to
force main
From Pump Tank
cap
Install Tracer
Pipe.
Wire with
Install Polylok
Equalizer at Inlet of
Each Feeder Pipe.
4" SDR 35
Sewer Pipe
Quick4 Infiltrator
Units (typ)
Stub Pipe Into Infiltrator Unit
and secure with screws
Quick4 End Cap
Unit (typ)
6' min.
(tyP)
To Last Infiltrator Trench
Distribution Box Plumbing Detail
SCALE: 1" = 2'
Quick4 Infiltrator Trenches
Shall be 1 Unit Wide x 12 Units Long in
4 Trenches for a Total of 48 Units
Stub 4" SDR 35 Sewer Pipe
into Infiltrator Unit and
secure with screws.
/\ /..//ice` ,%.
.a
This ISDS design is proposed to serve a single family residence with up
to 4 bedrooms.
Wastewater demands are based on a residence with up to 4 bedrooms
serving up to 1.5 occupants per bedroom for a maximum occupancy of 6.
Assuming an average daily residential sewage demand of 70 gpd per
resident.
The calculated Average Daily Waste Flows are as follows:
Residence Average Daily Waste Flow: 6 occupants x 70 gpd/occupant
= 420 gpd
Total Design Average Daily Waste Flow = 1.50 x Total Average Daily
Waste Flow: 1.5 x 420 gpd = 630 gpd
Minimum recommended concrete septic tank size Residence = 1250
gallons
Percolation testing was performed by Colorado River Engineering Inc. as
follows:
Percolation Rate 1: 51 min/inch
Percolation Rate 2: 33 min/inch
Percolation Rate 3: 29 min/inch
Use Worst case (conservative planning) = 51 min/inch
The required absorption area (A) for a normal gravel type leach area is
calculated using the following formula:
A = Design flow x -"Ave. Percolation Rate
5
Therefore, A = 630 x V38
5
A = 831 sf
Garfield County allows a maximum reduction of 50% of the required
leaching area for a graveless type design in a Trench configuration. This
is a Trench configuration,
Therefore the required Area = 831 sf x 0.5 = 415 sf
Required number of Infiltrator Units = 4151 15.5 = 27 units
Required number of Infiltrator Quick4 Units = 27 x 1.5625 = 41.8 units
The Trench configuration shall be 4 Trenches, each being 12 units long
for a total of 48 units (12% factor of safety).
Minimum Horizontal Setbacks:
Setback from Wells: 100 ft
Setback from Creek: 50 ft
The above designed ISDS shall be installed satisfying all minimum
setbacks and design stanuards as aescribed by Garfield County ISDS
regulations and according to all manufacturers specifications and
recommendations.
The contractor shall notify the engineer of construction time schedule and
will be required to have engineer inspect prior to burying underground
improvements.
All structures are served by private water well.
NOTE:
The Septic Tank shall be inspected on an annual basis to monitor the solids
loading within the tank.
Finished Grace
existing Grade
Backfill with Exccvated Soils
(See Infiltrator irstallation instructions)
1. • w
-
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The Outlet Filter should be removed and cleaned each time the tank is pumped.
The installation of plumbing shall also be subject to the corresponding building
codes.
Construct at 2' depth below existing ground
Scarify Excavated Leaching Surface (Keep Heavy
Equipment Out of Excavated Area). Entire Leaching
Bed Surface to be Level Within 0., feet.
10 gpm min Pumps, float switch on
when within 6" of inlet pipe, low level
float within 1—foot of floor
This Drawing Not Valid Unless Latest Revision Initials Are Hdwritten
Typical Infiltrator® Side Section Detail
Original Drawing Preparation
De' rriptio
Ry
rate
Approved
Date
By
Date
Drawn
CM
5-29-09
Checked
Approved
Client Appd,
SCALE: N.T.S.
4" PVC Inspection Port
Install in Irrigation Valve Box.
4" Notch to be Cut Infiltrator
and secured with screws
(Locations as per Site Plan)
COLORAD
41/F
ENGINEERING
11CORPORATrn
PO Box 1301
Rifle, CO 81650
Tel 970-625-4933
Fax 970-625-4564
CLIENT
Blair Residence
407 Groff Lane
SILT, CO
PROJECT Blair Residence ISDS
SHEET TITLE
ISDS
FILE
M:1CREjobliiles\797- Blair\ISDS.dwg
SHEET NO.
1
Revision