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Wirkler-Design Calculations OWTS
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j 401111100._ The existing OWTS is being upgraded with a replacement absorption field to
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treatment system (OWTS) is designed based on the design flow for a
3 -bedroom residencial capacity with expansion potential.
• From the Regulation 43 usage table :
11 Minimum population based on 3 bedrooms = 6 persons.
Additional population based on bedrooms assuming 1 person per bedroom.
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.
6® Design flow Qd = 6*75=450 gpd
Septic Tank Design:
Use a 1,500 gallon, two compartment concrete septic tank with an effluent
filter outlet sanitary tee in the second chamber. Tank shall be installed with
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sealed concrete risers and lids to the finish grade surface. Continue use of
existing septic tonk to serve as a raw sewage pump station to lift sewage to
the the new septic tank.
Sub Surface Conditions and Testing:
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Subsurface soil investigations and USDA soil texture method tests were
performed by Sopris Engineering. The soils in the area of the proposed
INSTALL CHAMBER absorption field were sampled and characterized by application of the USDA
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END CAP ON ALL END soil texture method analysis. The soils were tested to determine the hydraulic
ABSORPTION/TREATMENT FIELD 54 CHAMBERS (TYP)10 loading rate and the appropriate absorptive surface depth in the native soils.
0-4 CHAMBERS W/ END CAPS .� The soils below 6 to 8 inches of topsoil consist of medium dense silt loam
... �S�► - with moderate blocky to granular structure overlying deep cobbles and gravel
-GARAGE/BARN Pin a sandy clay loam matrix to the 7 foot depth explored. These soils appear
. to consist of outwash materials consisting of sand, silt, clay,
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Pie glacial gravels,
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UNDERGROUNDs°�cobbles and small boulders.
c-1- INSTALLED 4"RISER PIPEINSPECT
s\ -s � 'o ®• .•® O. EACH ENION PORTS AT
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TD CHAMBER (TYP) ahe soil tnative ils consisting ed of�omt 1-21nfet X below e withemodeaatece are block characterized to ran aas
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structure. This soil haan effective loading rate for conventionalsoil
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. treatment of 0.60 gal/S.F./day for a level 1 conventional treatment system.
. . `. The equivalent percolation rate is approximately 16-25 minutes per inch.
ABSORPTION/TREATMENT FIELD, INSTALLED`3 GRAVITY CHAMBER TRENCHES Increased quantities of cobbles and gravel are encountered at depths below 5
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•� 4„ PVC +� . .• WITH 18 CHAMBERS PER TRENCH FOR A TOTAL ABSORPTION AREA OF 648 SF� feet. No free water was encountered in excavations on site. Groundwater levels
DISTRIBUTION PIPES (525 SF REQUIRED). THE SYSTEM IS PLUMBED FOR EQUAL GRAVITY are expected to be well below 10 feet below the existing surface grades. The
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EXISTIING LEACH FIELD DISTRIBUTION. THE CHAMBERS ARE INSTALLED ON LEVEL GRADE IN EACH soils appear suitable for a conventional shallow absorption field consisting of
ABONDONED IN PLACE • O. TRENCH. THE BOTTOM OF EACH TRENCH WAS EXCAVATED TO A MAX DEPTH gravelless infiltration chamber units.
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OF 3 FT WITHIN THE NATIVE LOAM. INSTALLED WITH A MIN 12" NATIVE
N BACKFILL COVER OVER TOP OF THE CHAMBERS. SEPTIC FIELD FINISH Treatment -Soil Treatment Unit/ Absorption System Design:
'RIS E NGINEERING, LLC.
CIVIL CONSULTANTS
502 MAIN STREET
CARBONDALE, CO 81623
(970) 704-0311
FAX: (970)-704-0313
LIFT
SURFACE APPROX. 3" ABOVE ADJACENT GRADES.
INSTALLED ' SCHD-40 SEWAGE PRESSURE PIPE AT The treatment/absorption field is designed based on utilizing the effective
2.5%SLETOINSURE DRAINBACKTOPUMP TANK -_-=- Long Term Acceptance Rate (LTAR) for the native soils and the application of
SEWAGE PUMP BASIN. -GARAGE `\ appropriate loading factors for a soil treatment unit (STU) system utilizing
INSTALLED SIMPLEX SEWAGE PUMP ASSEMBLY TO " PVC GRAVITY SEWER LINE gravity distribution to gravelless infiltrative chamber units in a trench
RAW SEWAGE TO NEW PRIMARY SEPTIC TANK / ' STUBOUT AT 2% SLOPE ± � confirguration, for treatment across the native soil absorptive surface. The new
,•---- / DISTRIBUTION BOX WITH BAFFLE treatment system will consist of sewage collection and conveyance via a
ik INSTALLED LEVEL ON COMPACTED BASE. sewage pump station that will transport raw sewage to a new septic tank for
INSTALLED 48" DIA. ECCENTRIC CONCRETE INSTALLED RISERS AND LID TO SURFACE detention and gravity distribution to the new STU via a distribution box.
MH RISER W/ IRON RING/LID, STEPS . Long Term Acceptance Rate (LTAR)
W/HDPE RISERS AND LIDS INSTALLED AT THE FINISHED GRADE
litir.--1114 = INSTALLED 2 -COMPARTMENT 1250 -GALLON RIBBED PLASTI SEPTIC TANKConsidering the application of the new state regulation 43:
T ,INSTALLED
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EXISTING
SEPTIC
SURFACE. Receiving Wastewater Treatment Level 1; loading rate for silt loam is (0.60
INLET SANITARY TEE AND OUTLET EFFLUENT FILTER SANITARYgal./S.F./day) for soil type 2.;
SINGLE COMPARTMENT 1250 GALLON CONCRETE TEE. DEPTH TO TOP OF TANK FROM PROPOSED GRADE IS APPROXIMATLEY Loadingfactors; (Table 10-2, Gravityapplication trenches = 1.0 and
TANK WITH LID APPROX. 6" BELOW SURFACE GRADE t� 1 2" SCHED 40 PVC PIPE 1.5'. PP )
(Table 10-3, gravelless chambers = 0.7)
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HIGH POINT TRANSITION 2" TRANSPORT A(sf) = �: A = Area;
INSTALLED PUMP SYSTEM CONTROL
( C9 \ PIPE TO 4" GRAVITY TANK INFLUENT PIPE LTAR LTAR = 0.60 Gal/S.F./day for soil type 2, silt loam
PANEL ON EXTERIOR WALL
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Qd = flow (gal/day) = 450 gpd
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L.F.1=1.0 Gravity Distribution
\L.F.2=0.7 Chambers
25 '= A(sf) = 450 gpd x 1.0 x 0.7 = 525 S.F.
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0.60 Gal/S.F./day
■ Number of quick -4 chambers:U
525 S.F = 44 chambers Use 54 chambers
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EXISTING
12 S.F./Chamber
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RESIDENCE
54 chambers x 12 S.F./chamber provides 648 S.F. of absorption/treatment
area that equates to a Design Capacity of 555 gpd.suitable for an additional
(� 80 bedroom on the the existing residence or to be used as paritial capactiy for a future dwelling up to a 3 bedroom capacity with the addition of 2 additional
' d trenches and tank.
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° Use 54 Quick -4 chambers in three trenches 74' long by 3' wide with 18
, d chambers units per trench plus two end caps as delineated on the plan. The
d ° - .. ° septic tank effluent will be gravity distributed to the head of each chamber
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. 10°
, ° row via individual distribution pipes from a distribution box. Additional soil
. evaluation will be performed during construction to verify the soils in the
excavations.
GRAPHIC SCALE ,
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OWTS SYSTEM AS CONSTRUCTED NOTES
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GENERAL NOTES
1. ALL MATERIALS AND INSTALLATION CONFORMS TO STATE AND COUNTY
ONSITE WASTEWATER TREATMENT SYSTEM (OWTS) REGULATIONS.
( 2. ALL SEWER LINES INSTALLED WERE SCH 40 PVC PIPE AND INSPECTION
PORTS USE WERE SDR -35.
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3. THE SEPTIC TANK WAS INSTALLED LEVEL ON COMPACTED CLASS 6 BASE
MATERIAL OVERLYING NATIVE COMPACTED SOIL. INSTALLED WATERTIGHT
RISERS WITH ACCESS LIDS AT THE FINISHED SURFACE GRADE. TANK WAS
FLIPPED SITE REVISION:
BACKFILLED WITH SUITABLE NATIVE SOIL FREE OF BOULDERS & ROCK IN
1. THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS EXCESS OF 3" DIA.
ENGINEERING.
2. THE EXISTING CONDITIONS AND PLAT INFORMATION BY THE SEXTON SURVEY 4. SANITARY BAFFLE TEE INSTALLED ON THE SEPTIC TANK INLET AND OUTLET
COMPANY. PLUMB IN POSITION TO ALLOW EASY INSPECTION AND MAINTENANCE OF
3. PRIMARY OWNER NAME & ADDRESS: WIRKLER, NORMAN E & MARGARET & CHRIS TANK FROM THE TANK ACCESSES.
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PO BOX 1030
CARBONDALE, CO, 81623 5. INSTALLED A 4" EFFLUENT FILTER ON THE 4" BAFFLE OUTLET TEE OF THE
NWIRKLER@YAHOO.COM SEPTIC TANK. THE FILTER SHOULD BE INSPECTED EVERY SIX MONTHS. THE
OWTS RETROFIT AND UPGRADE AB -SYSTEM PLAN 4. PROPERTY ADDRESS: 9663 STATE HIGHWAY 82, GARFIELD COUNTY, CO EFFLUENT FILTER SHALL BE MAINTAINED AND CLEANED WHEN THE TANK IS
EM PLAN
PERIODICALLY PUMPED OR AS NECESSARY.
5. LEGAL DESCRIPTION: LOTS 4 & 5 OF THE MARTIN PARCEL IN SECTION: 20
TOWNSHIP: 7 RANGE: 88 OF THE 6TH P.M., GARFIELD COUNTY, CO 6. THE CONTRACTOR INSTALLED SEWER LINES, SEPTIC TANK AND RISERS
6. PARCEL ID #:2393-202-00-111 WATERTIGHT. ALL PLUMBING FIXTURES AND OWTS COMPONENTS SHALL BE
Pump Selection fora Non-PressurizedSystem- singleramllyhesldenceProiect ��� 7. GARFIELD COUNTY OWTS CONSTRUCTION PERMIT #: SEPT -04-18-5184 MAINTAINED TO AVOID SURFACE OR GROUNDWATER FROM ENTERING THE
18020-WIRKLER1 SEWAGE PUMP 1250 TANK TO FIELD aik��� 8. SIZE OF LOT: 7.1 ACRES SYSTEM AND TO PREVENT LEAKAGE FROM THE SYSTEM. IN-HOUSE
,e 9. CONTRACTOR: GREAT LAKES CONSTRUCTION. PLUMBING FIXTURES SHALL BE MAINTAINED TO PREVENT EXCESS WATER
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Parameters
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CONTACT: CHRIS LAKE00
FROM ENTERING THE SEPTIC SYSTEM.
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Discharge Assembly Size 2.00 inches
ADDRESS: POB 313, NEW CASTLE 81647
Transport Length 100 feet
Transport Pipe Class 40
CELL: 970 618 2813
Orenco Systems' 7. THE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE GENERAL
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Transport Line Size 2.00 inches
Incorporated EM: GLCCHRIS@YAHOO.COM AND DIMENSIONS OF OWTS COMPONENTS.
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DistrbutngValveModel None
Max Lift 12 feet
aangthg the Way the
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6080
Elevation 00
Design Flow Rate 10 gpm
_LOCATION
Meld Darr Wastewater' 8. THE ABSORPTION TRENCHES WERE EXCAVATED TO LEVEL GRADE IN NATIVE
RESIDENCE
.ARBONDALE
)UNTY, COLOI
TREATMENT
ZECORD DRAWINC
Flow Meter None inches
•Add-on•FridionLosses
CROWN FIELD TRENCH TO 4" PVC INLET PORT EARTH. THE TRENCH BOTTOM AND SIDEWALLS WERE SCARIFIED.
INSTALLED
24" IRON RING & COVER
0 feet
DIVERT SURFACE WATER IN END CAP
REVEGATATION
4' DIA
MH ACCESS KISER USE
Calculations
9. THE LEACHING CHAMBERS WERE INSTALLED LEVEL WITH A MINIMUM COVER
MAIN LEVEL FLOOR
4' CONCRETE
BARREL SECTION
Transport velocity os fps
TOPSOIL LAYER
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OF 12 TO 36 INCHES.
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& 2' ECCENTRIC
CONIC SECTION
Frictional Head Losses
BACKFILL WITH SCREENED
' 10. END CAPS WITH INSPECTION PORTS WERE INSTALLED ON THE END
Loss through Discharge 0.2
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6070
feet
ONSITE SOILS FREE OF ROCKS IN / / \\\\\ \\ \\ \\ \ CHAMBERS IN EACH TRENCH.
Loss in Transport o.2 feet
Loss
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EXCESS OF 3" DIAMETER OR USE =' 4= :`_ ,:n2.'-;'_:=: ///
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2' HDPE DR 9 OR SCHED-40 PVC
through Valve 0.0 feet
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PRESSURE TRANSPORT PIPE
Loss through Flowmeter 0.0 feet
•Add onFrdonLosses 0.0 feet x
3/4" TO 1.5' SCREENED ROCK _` �`t �,;.'-:\//� 11. VERTICAL INSPECTION PORTS WERE INSTALLED FROM THE PRE MARKED HOLE
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-'<-M.:-. s':~.':<'< ' ,-...- <-_\\N ON THE TOP OF EACH END CHAMBER END CAP. (TYP. BOTH ENDS OF
BASEMENT LEVEL FLOOR
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LEACHING
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Pipe Volumes c
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EACH ROW)THE PORTS HAVE PIPE CAPS INSTALLED ABOVE GRADE.
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CHAMBER
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SIMPLEX 2 SOLIDS HANDLING
Volt7ranspotune 17.4 gals m
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LEACHING / L
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SEWAGE PUMP HP
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FILTER FABRIC 12. THE CHAMBERS WERE BACKFILLED WITH EXCAVATED MATERIAL VOID OF 3"
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6060
Minimum Pum Requirements
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CHAMBER /// PLUS ROCKS TO AT LEAST 12 INCHES ABOVE THE TOP OF THE CHAMBERS.
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Design Flow Rate 10.0
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BACKFILL LAYER NATURAL
OFF FLOAT EL=
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Total Dynamic Head 12.4 feet//\
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ONSITE SOILS FREE OF ROCKS �jAA�j VAS ,, 13. INSTALLATION OF LEACHING CHAMBERS IS IN CONFORMANCE WITH THE
DATUM ELEVLL
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MANUFACTURES INSTALLATION INSTRUCTIONS.
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EXISTING CONCRETE
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SEPTIC TANK N
SELECTtSOIL REPLACEMENT 14 ARE R D THE FOUR
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FIELDS MUSTALLY
CORNERS WITHE TH NSPECTIONSPORTS. THE BET PROTECTED FROM
SCARIFY/TILL BOTTOM SURFACE TO AS NEEDED IF EXCESSIVE
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VEHICULAR AND LIVESTOCK TRAFFIC.
A DEPTH OF 3" AND RAKE LEVEL COBBLES OR BOULDERS ARE
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ENCOUNTERED. USE 4" FILTER
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15. THE ABSORPTION FIELD SURFACES WERE SLIGHTLY MOUNDED TO DIVERT
NOTE: ALL CHAMBERS IN EACH TRENCH MUST BE INSTALLED
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SAND LEVELLING COURSE. SURFACE DRAINAGE AWAY FROM THE FIELD.
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ON LEVEL GRADE. MAINTAIN 6' OF UNDISTURBED SOIL is,r,,,,f
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UNDISTURBED EARTH SILT ',•,
BETWEEN TRENCHES. THE ELEVATION OF ADJACENT TRENCHES ����� RE 16. THE ENTIRE ABSORPTION FIELD SURFACES HAVE BEEN SEEDED AND
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LOAM SOIL. t .e"'•,
MAY VARY. MAXIMUM DEPTH OF TRENCHES NOT TO EXCEED T '; MULCHED TO RE ESTABLISH VEGETATED COVER.
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Pump Optimal Rarge:-
30" BELOW PROPOSED SURFACE GRADES. INLET AND END .%� GX Ni' '
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OWTS PROFILE
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CAPS ARE TO BE INSTALLED ON EACH END CHAMBER ROW. e -ti�..,'. 4 f 17. THE ABSORPTION FIELD WERE INSTALLED PER THE REQUIRED SETBACK
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40
Net Discharge
80
20
100
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• DISTANCES:
10 FEET FROM ANY PROPERTY LINE.
28377 ;tr ` 25 FEET FROM ANY POTABLE WATER SUPPLY LINE.
IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED "PIP.//84.4•
IN ANY PART OF THE EXCAVATION, OVER EXCVATE AND BACKFILL , 20 FEET FROM ANY OCCUPIED DWELLING. 100 FEET FROM ANY WELL, SPRING OR CISTERN.
DATE: 10-18-2018
WITH SAND OR SUITABLE SCREENED NATIVE SOILS. (�'
S'SiONAI. E����•'50 FEET FROM ANY STREAM OR WATER COURSE.
SEWAGE PUMP CURVE ' r'1
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JOB NO. 18020.01
CHAMBER TRENCH CROSS SECTION DETAIL n "
N.T.S. M:\3800dwgs\18020\18020-AB-OWTS-Record2.dwg
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