HomeMy WebLinkAboutOWTS Design & Site PlanOWTS DESIGN CALCULATIONS 2020:
5-BEDROOM RESIDENCE:
• (75 GAL/PERSON/DAY x 2 PERSONS/BEDROOM for first 3 and 1 person above 3 BR
8 persons)
• DESIGN FLOW = Q = 600 GALLONS
TANK SIZING:
• 5-BR BY REGULATION IS A 1500 GALLON TANK
• USE EXISTING 1,250 AND ADD 500 GALLON DOSING TANK WITH DOSING PUMP.
ABSORPTION AREA SIZING:
• LTAR RATE = 0.30 GAL/SF (USDA LOAM VIA Kumar & Assoc. report 19-7-575)
• TRENCH AND PRESSURE DOSING REDUCTIONS
• CALCULATED ABSORPTION AREA = A=(Qd/LTAR)=(600/0.35)
•• Qd = DESIGN FLOW = GAL/DAY
ABSORPTION AREA = 1714 SF
10% REDUCTION FOR PRESSURE DOSING
30% REDUCTION FOR CHAMBERS IN TRENCH
••
••
••
TOTAL AREA REQUIRED FOR 4 BEDROOMS = 1260 SF
HANGING 1.5" DOSING PIPE IN ARC CHAMBERED TRENCH SYSTEM:
• ABSORPTION AREA PER DESIGN 1260 SF.
• EACH ADS CHAMBER ACCOUNTS FOR 15SF OF AREA.
84 CHAMBERS REQUIRED.
4 ROWS OF CHAMBERS (21 CHAMBERS EACH) SPACED 6' APART EDGE TO
EDGE FOR REQUIRED AREA.
••
••
SITE CONSTRAINTS/SETBACKS:
• WATER SUPPLY LINE LOCATION.
• LOCATION OF HOUSE.
• EAST PROPERTY LINE
1. ABSORPTION LATERALS SHALL NOT EXCEED 150-FEET IN LENGTH WITH USE OF PRESSURE DOSING.
2. THE BOTTOM OF EACH ABSORPTION TRENCH SHALL BE LEVEL.
3. DRAINAGE SWALES ARE TO BE PROVIDED ABOVE AND AROUND TRENCHES, AS NECESSARY, TO PREVENT SURFACE RUNOFF FROM
ENTERING ABSORPTION AREA.
4. TRENCH LATERALS SHALL FOLLOW CONTOURS IF POSSIBLE.
5. INSTALL ARC UNITS IN ACCORDANCE WITH MANUFACTURER'S RECOMMENDATIONS.
6. TRENCH BOTTOM AND SIDEWALLS MUST BE RAKED TO REMOVE SOIL SMEARS INCURRED DURING EXCAVATION.
7. NO EXCAVATION OF ABSORPTION FIELD IS TO BE DONE DURING WET WEATHER AND USE OF RUBBER TIRE VEHICLES OVER ABSORPTION
AREA IS PROHIBITED
8. BOULDERS EXISTING WITHIN THE TRENCH SHALL BE EXCAVATED AND BACKFILL SHALL CONSIST OF ONSITE SELECT MATERIAL.
9. SUBMIT SHOP DRAWINGS FOR REVIEW PRIOR TO ORDERING SYSTEM PARTS.
10. THE CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING THE LOCATIONS AND DEPTHS OF ALL EXISTING BURIED UTILITIES.
11. CLEAN OUTS ARE REQUIRED WITHIN 5 FEET OF THE HOUSE FOUNDATION, AT ALL BENDS AND A MAXIMUM OF 100 LF SEPARATION
ALONG THE SEWER LINE RUN FROM THE HOUSE TO THE TANK.
12. THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ALL WATERTIGHT COMPONENTS, PRIOR TO THE ABSORPTION AREA, TO
PREVENT INFILTRATION.
13. TOPSOIL COVER MAY BE VARIED (WITH 6" MINIMUM) TO ALLOW FOR NON -INTRUSIVE LANDSCAPING, MAXIMUM BURY DEPTH OF 3' IN
DEPTH.
14. INSTALL RISERS AS NECESSARY TO BRING ALL ACCESS POINTS TO ONE-HALF FOOT ABOVE FINAL GRADE.
15. LOCATIONS OF ALL COMPONENTS MAY BE VARIED AS NECESSARY AS LONG AS ALL MINIMUM DISTANCES AND SLOPES MEET THOSE
REQUIRED.
16. THIS DRAWING DOES NOT CONSTITUTE AN OWTS PERMIT. PERMIT MUST BE OBTAINED FROM APPROPRIATE COUNTY OFFICIALS.
ENGINEER MUST OBSERVE CONSTRUCTED SYSTEM BEFORE BACKFILL AND PROVIDE REPORT TO COUNTY.
17. THIS SYSTEM IS SIZED FOR TYPICAL DOMESTIC WASTES ONLY. BACKWASH OR FLUSHING FLOWS FOR REVERSE OSMOSIS UNITS OR
WATER SOFTENERS OR FILTERS SHOULD NOT BE INTRODUCED INTO THIS SYSTEM. GARBAGE DISPOSAL INSTALLATION AND USE IS ALSO
DISCOURAGED.
18. INSTALL BLUEBOARD INSULATION OVER SEWER PIPE WHEREVER DEPTH IS LESS THAN FROST DEPTH.
19. IF GROUND WATER IS ENCOUNTERED, THE OWTS TANK MUST BE ANCHORED PER MANUFACTURERS RECOMMENDATIONS TO KEEP TANK
FROM FLOATING.
20. SITE PLAN INFORMATION, NUMBER OF BEDROOMS, SIZE OF HOUSE PROVIDED BY PROJECT ARCHITECT OR OWNER.
21. LEACH FIELD MUST BE SURVEYED AFTER INSTALLATION FOR ACCURATE LOCATION FOR FINAL FIELD INSPECTION, AS-BUILTS AND
WRITE-OFF.
22. NO IRRIGATION DITCH FACILITIES ARE TO BE CONSTRUCTED ON THE SITE. ONSITE LANDSCAPE IRRIGATION WILL NOT BE APPLIED TO THE
OWTS SYSTEM AREA EXCEPTING TEMPORARY FACILITIES TO ENCOURAGE GRASS GROWTH FOR THE FIRST YEAR.
23. DOMESTIC WATER IS TO BE PROVIDED BY PUBLIC SYSTEM.
24. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE GARFIELD COUNTY REGULATIONS FOR ONSITE WASTEWATER TREATMENT
SYSTEM DESIGNS. THE CONTRACTOR SHALL BE RESPONSIBLE FOR SUCH SPECIFIC DETAILS AS REFERRED TO IN THE ABOVE MENTIONED
REGULATIONS.
25. CONCRETE SEPTIC TANK SHALL COMPLY WITH THE STRUCTURAL DESIGN CRITERIA OF ASTM C1227-12 (STANDARD SPECIFICATIONS FOR
PRECAST SEPTIC TANKS).
26. ALL NEW TANK INSTALLATIONS REQUIRE AN EFFLUENT FILTER TO BE PLACED DIRECTLY WITHIN THE OUTLET TEE OR INLET SCREEN IF
PUMPED. THE INLET OF THE TEE MUST BE PLACED WITHIN THE CLEAN WATER ZONE IN THE TANK, BELOW THE SCUM LAYER AND ABOVE THE
SLUDGE LAYER. FILTER SHALL EXTEND INTO THE LIQUID A DISTANCE EQUAL TO APPROXIMATELY 40% OF THE LIQUID DEPTH POTENTIAL
27. TOPOGRAPHY PROVIDED BY USGS LIDAR DATA FROM 2016.
28. BOUNDARY INFORMATION PROVIDED BY OWNER. SYSTEM MUST BE SURVEY LOCATED WHEN BUILT TO VERIFY MINIMUM SETBACKS.
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5 ROWS OF 17 TOTAL
85 CHAMBERS
FIELD WITH MIN. 4'
EDGE TO EDGE
TRENCH SPACING.
/'
II
/
I
/ / I I /
/ / / /
(
FLUSHING
VALVE TO BE
LOCATED AT END
OF EACH ROW
INSPECTION
PORT TO BE
LOCATED ON
EACH END OF
EVERY ROW
5-WAY AUTOMATIC
DISTRIBUTION VALVE W
AIR RELEASE
LINES TO CHAMBERS
MUST HAVE POSITIVE
SLOPE TO DRAIN TO
CHAMBERS
MINIMUM 20FT BUILDING
1
NEW 500 GALLON DOSING
TANK- LINE TO ADV
MUST DRAIN BACK TO -
TANK, DOSE SHALL BE
SET FOR 150 GALLONS,
PUMP SHALL BE MINIMUM
20 GPM AT 25' TDH
)
EXISTING 1250
GALLON SEPTIC TANK
TO REMAIN
WALL TO SIDEWALL
\ /
/ /
/ /
/
/
/ /
MINIMUM 10'
SETBACK TO
LPROPERTY LINE.
/
20
0
GRAPHIC SCALE
20
40
80
7
1 inch = 20 ft.
"07 ,Th
1
144,
ZCtO
HO
OF
REVISION
Co-
CHECKED BY:
0
03
u;
to
0
PROJECT NO.
t Wilt.
TOP SOILS AND "�la 0 L. i %t,
CODE OF COLORADO REGULATION 5 CCR 1002-45
Water Duality Control Commission
S
NATURAL BA
ESILL.14%
REMOVABLE PVC CAP A. 0 �le
OVER INSTALL MARKER IF CAP
12" MIN. COVER � { (5
IS TO BE BURIED.
Table 7-1 Minimum Horizontal Distances in Feet Between Components of an On -Site Waste;rater Treatment System Installed After
November 15, 1973 and Water. Physical and Health Impact Features
-_—
48" MAX. COVER
{ 7
I.)
''
FINISH GRADE
Spring,
Potable
Structure
Structure
rtv
Property
Subsurface
Lake,
DrySeptic
_
III
Via
Well,'
Water
w/basement.without
p
Lines,
Drain,
Water
Gulch,
p
Tank,
_
_
/
_i��
Suction
Supply
crawl space
basement,
Piped or
Intermittent
Course,
Cut
Higher level
DOSING PIPE PER -
I
/
/
III
II,-.'
!
Line,
Line2
or footing
crawl
Lined
Irrigation
Irrigation
Bank,
treatment
-
Potable
drains
Irrigation
Lateral,
Ditch,
Fill
Unit,
MANUFACTURER'S
/
—
— o 0 0 0 o L` r - , , ,
space or
o-�°�
o° r'
Water
footing
Ditch,
Drywell,
Stream,
Area
Dosing
RECOMMENDATIONS WITH
I—
�,
III
—I
°
I o o°
_
. ..ra."�"
oo ° ' •;-
Supply
drains
upslope
Stormwater
Wetland
(fmm
Tank, Vault
I HOLES DRILLED EVERY
4' ALONG PIPE POINTING
71111
I
IIII-
Cistern°
curtain
drain
Structure
Crest)
or Privy
UP IN THE CHAMBERS.
I=/�
/
I
—III
Septic Tank,
502
102
5
10
10
10
_
DRILL 1 HOLE ON EACH
=
1-
I I
/
I I
—III
Higher Level
END POINTING DOWN TO
I
I I
—III-
_
�\
Treatment Unit,
Dosing Tank,
ALLOW DRAINING AFTER
I I
I I III
I I
—
—
I I
—I
DOSE.
_
_
_
_
I
_
I I I
_
I I I
_
I I
Vault or Vault
-
I I —III
—I
I —I
--_—
I
I
—
II
Privy
I
—III
—III
—I
I
—I
I—
I I
I
I—
Building Sewer
50 2
5 6
0
0
10 2
10 2
50 =
10 2
_
or
-II
III
—II
—I
I
—II
Effluent Lines
I
_
_
—III
—III
—I
I
—1
_—
—II—
I I
STANDARD ARC 36 UNIT
STA Trench, STA
1003
252
20
10
10
25
50'
25
5
4" COUPLING
Bed, Unlined
I
—III
—II
—I
—_—_—
I —II—
AND END CAP.
4" RISER
NATURAL
Sand Filter, Sub -
GROUND
III
I
I
I I
—
I
I
surface Dispersal
—I
I
—
I
I I
—
I
I
—
—
—
—
—
—
IT
System, Seepage
—III—III—I
1 I
—I
I I —I
I I
—III
—III
—I
°
Pit
4'' 45 SWEEP BEND
Lined Sand Filter
60
102
15
10
10
10
4" SEWER LINE
Lined Evapo-
TRENCH
AND
36"
ROUGHENED
TRENCH
BOTTOM
LEVEL
transpiration Field
or outside of
Berm of Lined
Wastewater Pond
FLOW
CODE OF COLORADO REGULATION 5 CCR 1002-43
Water Quality Control Commission
TRH
\
C
CROSS
SH
CT
O
\
.
T.
S.
��
��
Spring,
Well,'
Potable
Water
Structure
wibasement,
Structure
without
Property
Lines,
Subsurface
Drain,
Lake,
Water
Dry
Gulch,
Septic
Tank,
REMOVABLE
PVC
CAP
4" x 4" x 4"
Suction
Supply
crawl space
basement,
Piped or
Intermittent
Course,
Cut
Higher level
PVC WYE
Line,
Potable
Water
Line
or footing
drains
crawl
space or
footing
Lined
Irrigation
Ditch,
Irrigation
Lateral,
Drywell,
Irrigation
Ditch.
Stream.
Bank,
Fill
Area
treatment
Unit,
Dosing
CLEAN OUT
DRILL
4 —
1
/2"0 AIR HOLES
Supply
Cistem4
drains
upslope
curtain
Storwater
m
Structure
Wetland(fromTank,
Crest)
Vault
or Privy
Z
IN
EXPOSED
PIPE
ASSEMBLY
) 0 (
OPEN
HOLE IN
TOP OF SEWER CLEAN
OUT DETAIL
Unlined SandF
100
252
15
15
10
25
15
10
4" 0
SOLID
\/ \/\\
SIDES
/
\ \
'�\ /\\ \ RO
/� OUP
PIPE
/
GHEN�b
G
/
ARC
FOR
OF
INSPECTION
UNIT AT
INSTALLATION
/
\\
END
N.T.S.
WELL PIPE
\� \
\\ \
/
ith
allPercolatioter in Soiln�Rate
Slowerthan60
Unutesperinch,
Unlined or
Partially Lined
Evapotrans-
piration System,
•
\\
��
\\\
/
0
/
/
/
/
�
/
Outside of Berm
of Unlined
Wastewater Pond,
or System Not
Relying on STA
for Treatment
Other than
Aerosol
O > ;o GARFIELD COUNTY, COLORADO �O, GOv��'A HIGH COUNTRY ENGINEERING, INC.
`1.I �' �� 1517 BLAKE AVENUE, STE 101,
LOT 22 OAK MEADOWS F2 C H CAE GLENWOOD SPRINGS, CO 81601
N 0 —I ONSITE WASTEWATER l'it}:
PHONE (970) 945-8676 - FAX (970) 945-2555
P TREATMENT SYSTEM iNEER`WWW•HCENG.COM
/\
i
/\/
4" 0 PERFORATED PIPE
SET BOTTOM ON CONC.
Slit Trench
Latrine, Pit Privy
100
502
25
25
25
25
l:=1
25
N/A
/ '/
\//A\//�\//�\//�\//�\//�\//�\/
/////'//'//'//'/
'BURIED
BELOW BOTTOM LEVEL
System Not
Relying on STA
for Dispersal
1003
102
125
1255
10
0
25:
10
10
\SPECTIO\
INFILTRATOR
WELL
UNIT
j
I- TA
L
NOTE: The minimum distances shown above must be maintained between the OWTS components and the features described_ Where soil, geological or other conditions warrant,
greater distances may be required by the local board of health or by the Water Quality Control Commission pursuant to section 25-8-266, C.R.S. and applicable regulations. For repair
or upgrading of existing OWTS where the size of lot precludes adherence to these distances. a repaired OWTS must not be closer to setback features than the existing OWTS, as
reviewed and approved by the local public health agency. Components that are not watertight should not extend into areas of the root system of nearby trees.
1 Includes potable wells, irrigation wells and monitoring wells set within a potable aquifer and infiltration galleries permitted as wells by the Division of Water Resources.
N.T.s.
STATE SETBAC<
GUIDELINES
NOTES:
Table 6-1 Single -Family Residential Design Flows _
1. CONCRETE TANK MUST MEET ASTM C1227-12
2. ADDITION OF A CHARCOAL FILTER VENT
STANDARDS.
LINE FROM TANK CHAMBERS WILL
PROLONG
THE
LIFE OF
THE
TANK CONCRETE, NOT REQUIRED.
# Bedrooms
Occupancy
(# of Persons)
Wastewater Flow Per
Person (gallons/day)
Design Flow
(gallons/day)
3. FILTER REQUIRED ON OUTLET OF TANK..
2
4
75
300
r ----N,
1CP
=
67
7575
50
Automatic
Distributing
Vaives
,,500
lam
Gallon Top
Seam
-
4
525
soovicr4ei
with High
Head
Pump1
85
75
boa
i-.
I-,
l-J
6
9
75
675
Pt
Top
__
r-
DESIGN NOTES
1,
Pi
•
■ design per performance test
per AST1M•
I
Table 9-1 Minimum Septic Tank Size Based on Number of Bedrooms
'I
L:j1.1
C1227
Top 23.4 fir
34-5�IIIIr'I.
I
L__i _ i
'
i
'I
■ surface area
Pc
4
Cleir Access
1CVA
�,
Number of Bedrooms
Tank Capacity (gallons)
i
I I °
:
o I.
• 0 28 days: concrete = 6,000
PSI
r,iiii
a
Installation.
illlit
ri .
I,00[]
�"i `+'
Tank to be set an 5' min. sand
111
�-,
—
Ei r
flu + 11111 — �, m'•
,--.
■>• '
bed or pea gravel
• Tank to be 4aekf lied uniformly
el0 sides in lifts less than 24-
an
and
,aJ
4
I ,"_ U
I M
. .
.
mechanically compacted
• Excavated material may be used
for
'- •
".-•
i'"
:••
II
III
I
1
Each Additional tic11 l�� l
250
Top Vllow4402 Top ViawvV8400
Top VTisiw—V13444
bockfill, provided large stones
removed
• tnkfilledn should bsdexrtto
ore
and
.
■�y +
w
tarok filled with water prior to
being
�' **�Pg��''
(�lJ"
J I r
�1 ■'-1 r ■--' , ■
put in service for installation
table Tess Inert 2° beta.
with Wb'
. _ '
_
40
eater
• Meets C1644-06 for resilient
calnnect+xa
grade
,
6111ti_
�
�.
yti
l�i
T
_ �I
..,0„, .'�'i r I'=..
■ Inlet and Gullet Identified above
pipe RUINSBo
..• .
• Delivered complete with Internal
• Control Panel to be mounted
piping
in sight
H4yjil7�'
t$•
_
_
I _
--
line of tank
-.
`. >`• , ,Iiityl
—
;"' j
■ 4' Maximum bury depth
Rubber
_
K
!r 9
1 t
1
T 1
. 1
I
IWIFICIOW
Top V 6l0MM Top ViOW-VBBOS
-1
ALLOWABLE BURY
(Based on Writer Table)
.....„..
7" DIA VALVESeries
WATER TABLE
EARTHIl
WITH SECURED LID
In 3D" Mender orgy
SIminiass Steel Bolds -.... 1.5" inlet & outlet
o. - ce
x' - lr
L
1• - a^
4' - o-
1,5"PVCSLIPXMALE
anld �Gle t �'_ 1 I- 1 mflovvrate
��
2'_0-4'-0"
1
U +
PIPE THREAD
_IVIFF-
y
View
•_
-
FINAL 1 , -T— ADAPTOR W/CAPII
m
1--
GRADE �'r l•
� l� I !
DRY
4' - a"
p
I
I— —_
i- L
-.1; I 1 -- 1, 5" DIA BALL
Height Vedas +►
• Lamm TS$ sled
Improves efduetitt
/� �}
I
L`� VALVE
_ __
Air Release Valve ' I I l_'
"
y
q ity to field
i
PVC Erldosue rh':,
�'•�
• Compleabi elii$on
(wiling, pelf,
1,5" DIA PVC LONG
Free yj = :• i rli
e■. !
��
'SW= contracts `�'y� for
. molure and
propedw$a)
..
. .. ��.# . .j.� .. .. SWEEP 90" BEND
Gravel Bin owe" point
• Complete warmly
`��ii■'�: ■l��r J
*
Side Mow t"
END CAP END CAP �1r��t.
r � .,�,�
mpinillni
Specs
invert
Dimensions
Net
Net ltfeight
FRONT VIEW SIDE VIEW
' 1� �42
•�I �+� le , #
_Digging
Win.
Capacity
Ltd Tank
Total
END CAP
' # • `• `0� "'L on O ` IN -SITU SOIL
Y:
7" Long x 7' Wide
Inlet
Outlet
Length
Width
Hat.
REAR/TOPVIEW 1 RENAMED
TX
02i19r16
:� ►4 in► ►•t w
, v
56" below inlet
56"
54"or73"
58"
58"
92"
522 gala
1.340 Ib•_ 4,100
Has 5.640 Ibs
_
0NHS ADS, iu
RE'•` DESCRIPTION
EY
M 1 D.r'r
Cii£D
PROVIDED TO STHIS
ADVANCED DRAINAGE SYSTEMS. INC- IN PROVIDED
ET C
lirALLEY
D NGIS MENDED TO DEPICT THE COMPRASED
COMPONENTS AS REQUESTED. ADS HAS NOT PERFORMED ENGINEERING ORDES4N
5ERw10Es FOR THI5 PROJECT, NOR HAS A75 INDEPENDENTLY VERIFIED THE INFC'RNATION SUPPLIED. THE INSTALLATION oETA.LS
ARC 30 HC CHAMBER
a
s �cT
Phone,: F1� 4
Pho : 71'�714
PROtADED HEREIN ARE GENERAL RECJMNEHDA11CHS AND ARE NUT SPECIFIC FOR THIS PROJECT, TOE DESIGN ENGINEER S-01U-Int
O FLUSHING DETAILIIFoIt:
T1G-306-37r27
•7+f
Fax: �I�iif
s
THESE DETAILS PRIOR TO' CONSTRUCTIDN. ri IS THE DESIGN ENGINEERS RE5P0','SISIJTY TD ENSURE THE DETNLSAND
END CAP LS
MO7
N I'i
rroT ro cnLFREYIE41f
PRECAST"
-lid .aOff1lirVALLEY
inc.c
PROVIDED HEREIN MEETS OR EXCEEDS THE APPLICNBLE NAT1r�NNA1, STATE, OR LOCAL REOUIREUENTS NID TO ENSURE THAT THE
sow•
W`, www.
DETAILS PROVIDED HEREIN ARE ACCEPTABLE FOR THIS PROJECT.
DRAM NGNUMBER STD-904
OF 1
Exist frontdoel.elleypreceethernj
Vista,
Buena Vista,
Corrado Eel edl:
c rrt
TYPICAL
500 GALLO\
TWO
COVPARTVENT
SEPTIC TA\<
ABC
CHAN/3E
DETAIL
WITH HIGH HEAD DOSING
PUVP