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GENERAL NOTES:
1. THE REPLACEMENTDWTS A5 SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRI5
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ENGINEERING.
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1060 Gallon - ZCP
2. THE PROPOSED LOTCONDITIONS BY SOPRIS ENGINEERING AND OWNERS.
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lt*MCIMD80-ZCP InfiItratorO PoI Tank
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3. THE EXISTING LOT CONDITIONS PER COUNTY G15 DATA BASE, AERIAL MAPPING, LIDAR TOPOGRAPHY,
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Existing subdivision Plat AND owner provided sketches.
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4. OWNER NAME & ADDRESS: RICHARD A & VICKY L NASH
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965 WESTBANK RD,
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GLENWOOD SPRINGS, CO. 81601.
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5. LEGAL SUMMARY: GLENWOOD SPRINGS, CO. 81601.
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6. SITE ADDRESS: 965 WESTBANK RD, GLENWOOD SPRINGS, CO 81601
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7. Parcel Number: 218535301015
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Mid -Height Seam
PROPERTY LINE
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S. EXISTING GARFIELD COUNTY PERMIT #5EPT-05-216880, ISSUED 08/02/21
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Design Calculations OWTS
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EX 2" SEWER SERVICE PRESSURE PIPE
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STA CHAMBER TRENCH FIELD
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EX SUB FLOOR EJECTOR PUMP
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The site has an existing 3- bedroom residence served by an OWTS constructed in 2001. The new addition will
add an additional bedroom and full bath to be served by additional OWTS components. The proposed onsite
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INSTALLED 15 QUICK-4 PLUS CHAMBERS IN 3 TRENCHES 22' STex
LENGTH WITH 5 CHAMBERS PER TRENCH PLUS END CAPS
BASIN FOR' SHOP BATHROOM
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wastewater treatment system (OWTS) is being installed to serve a small apartment and and existing bath in
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FOR A TOTAL ABSORPTION AREA OF 180 S.F
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homeowner garage shop facility.
The design flaw treatment capacity is calculated as follows for a minimum equivalent 1-bedroom single family
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INSTALLED 4" INSPECTION PORT RISERS W/
INSTALLED 4" 2-WAY CLEANDUT
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residence. The additional OWTS improvements will be complimentthe existing 3- bedroom residence.
DATE:
08-04-25
PUSH ON CAP SET 3" BELOW FINISH GRADE &
INV.
EL. 1.5' BELOW EX GRADE
EX 2" EJECTOR PUMP TRANSPORT PIPE TO BE�f
From the Regulation 43 usage table
COVERED WITH 6" DIA. VALVE BOX SET WITH
INSTALLED 4" SCHD-40 PVC SEWER
CONNECTED TO NEW 4" SEWER SERVICE
- Carnpllanl with LSA and IAPfrD SE-d-de HOW
rn-latad lid.
Minimum population based on 1 bedroom = 2 persons.
JOB NO.
30177.01
LID 1" ABOVE FINISH GRADE
SERVICE PIPE @ 1.3%
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Maximum bur al depth le 4a' rnmm1mw
Gallons erda per person =75gal/person/day,Na eakin factor
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DESIGNED BY
PER
07/23/25
Mlnlmum burlier depth Is V
(TYP. EACH TRENCH CHAMBER END CAP) . Tank E. not rated far vehicular truffrc loading up. a w Max. Design flow (Qd)gallons/day of people) x (avg. flaw}gal/person/day.
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*l INSTALLED CHAMBER END CAP
INSTALLED
4"X4"X2" FULL BODY -
• E.terlor of manhole cam includes Lh• following {nWNN4
,Nanning: %ANCER oa NOT ENTB: POISON End
Design flow Qd = 2*75=150 gpd
DRAWN BY
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04 21 25
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ON ALL ENQ CHAMBERS
WYE PIPE CONNECTION FITTINGS
600 S.F. ADU
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CHECKED BY
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08/04/25
VARIABLE TRENCH EXCAVATION DEPTHS.
EACH TRENCH SURFACE ABSORPTIVE SURFACE
1-BEDROOM
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Digging Specs Invert Ulmensrvns Not weight
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Septic Tank Design
APPROX, 2'-3' BELOW EXISTING GRADE J 12' Long x 7' Wide Inlet Outlet Length MAdth Height: Use a 1000 gallon, two compartment plastic septic tank with an effluent filter outlet sanitary tee in the second
47' 44' 127' 62.2' 54.7' 1n4 32fl lb..
gal
chamber. Tank shall be installed with sealed plastic risers and lids to the finish grade surface.
4" PVC DISTRIBUTION PIPE, INSTALLED INTO
UPPER END PENETRATION OF END CAP (TYP.)
Phone: 719.395-8784
Preliminary Sub Surface Conditions and Testing
' VALLEY FSX: 719-395-37Z7
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L PRECAST IsiC. Webaiba: www.valleyprecastoom
A subsurface soil investigation and site assessments were performed by Sopris Engineering on May 1, 2021 and
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Email: frontdwk@vallaypreeast=n
guano Vista, CDIo:RdD
June 7 2021. The shallow soils in the previously excavated chamber trench field, excavation for the
replacement tank and soils observed in the deep crawl space area were sampled and characterized by
DISTRIBUTION
INSTALLED PLASTICIBUTION BOX ON COMPACTED
DIETSERS
BASE
application of the USDA visual/tactile soil texture method analysis. Soils were observed in the 2-3 feet deep
INSTALLED W/ LID SET 3" ABOVE SURFACE
GRADE
trenches excavated for the original replacement field. A 2.5 shallow hand dug profile hole was dug in the
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REINFORCED PLASTIC SEPTIC TANK DETAIL
vicinity of the field and the approximately 6 feet deep vertical foundation excavation walls were observed and
foot
EX-2" SEWER PIPE RECOVERED, SEVERED
AND
sampled at 3 and 6 depths. The soils below 6 inches of topsoil consist of medium dense slightly sandy silt
INSTALLED ORENCO EFFLUENT FILTER OUTLET SANITARY TEE
ABANDONED IN PLACE
N.T.S.
loam texture soil with slightly blocky to granular structure to a depth of 6 feet. The soil profile contained less
than 35% scattered gravel or rock content to the 6-feet depth observed below the surface grades. No evidence
of free water was encountered in the excavations. Seasonal high Groundwater levels are expected to be below
INSTALLED A 2-COMPARTMENT 1060-GALLON PLASTIC
SEPTIC TANK
10 feet from the existing surface grades on the relatively flat terrain.
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INSTALLED INLET SANITARY TEE & OUTLET EFFLUENT
INSTALLED WITH (2) 24" DIA. BY 12" DEEP PLASTIC RISERS
FILTER ASSEMBLY.
WITH LIDS.
TOP OF LIDS INSTALLED 2" ABOVE FINISH GRADE.
The native soils sampled from 2-3 feet below the surface, in the vicinity of the proposed field and foundation,
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INSTALLED 45 QUICK-4 CHAMBERS IN 3 TRENCHES WITH 15 CHAMBERS UNITS PER
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are characterized as a soil type 2 consisting of silt loam texture with slightly blocky granular structure. This soil
has an effective loading rate for conventional soil treatment of 0.6 Gal/S.F./day for a level 1 conventional
TRENCH FOR A TOTAL ABSORPTION AREA OF 525 S.F. THE SYSTEM 15 PLUMBED FOR
EQUAL GRAVITY DISTRIBUTION. THE BOTTOM OF EACH TRENCH WAS EXCAVATED TO A
treatment system. The equivalent percolation rate is assumed to be 20-30 minutes per inch. The sails are
MAXIMUM AVERAGE DEPTH OF 24INCHES BELOW THE EXISTING SURFACE GRADES WITH /
suitable far a shallow conventional shallow absorption field consisting of gravelless infiltration chamber units.
A MINIMUM 10-INCHES OF COVER OVER THE CHAMBERS. /
INSTALLED CHAMBER ENDCAP5
Additional sail evaluations were performed during construction to verify the soils in the entire field excavation.
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The sails in the tank, pipline and STA trench excavations were observed and found to have consistent relatively
dense silt loam soils with fine structure shape of moderate
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INSTALLED 4" RISER PIPE PORT
granular grade.
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INSPECTION
Soil Treatment Unit/ Absorption System Design
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EXTEND RISER W/ CAP MIN. V ABOVE FINISH
GRADE (TYP. EACH CHAMBER END CAP) �
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The treatment/absorption field is designed based on utilizing the effective Lang Term Acceptance Rate (LTAR)
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4" PVC DISTRIBUTION PIPES (TYP.)
for the native soils and the application of appropriate loading factors for a sail treatment unit system utilizing
gravity distribution to gravelless chamber trenches.
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TO HEAD OF EACH TRENCH END CAP
PLASTIC 5-PORT OUTLET DISTRIBUTION BOX
Lang Term Acceptance Rate (LIAR)
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INSTALLED LEVEL ON COMPACTED
BASE. INSTALLED RISERS & LID TO SURFACE GRADE
Receiving Wastewater Treatment Level 1;
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INSTALLED 4" 2-WAY CLEANOUT
4" SDR-35 PVC EFFLUENT MIN. 196,
INV. 1.5' BELOW EX GRADEf
LTAR; (Table 10-1 Soil type 2 loading rate for a silt loam is (0.6 gal./S.F./day);
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Design Flaw; Qd = flaw (gal/day) =150 gpd
Loading factors; 10-2, Gravity trenches, L.F.1 = 1.0)
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INSTALLED ROTH 1060 GALLON 2-COMPARTMENT REINFORCED PLASTIC SEPTIC
(Table application
(Table 10-3, Gravelless chambers, L.F.2 = 0.7)
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TANK WITH SEALED RISERS & LIDS INSTALLED AT THE FINISHED GRADE SURFACE.
INSTALLED INLETSANITARY TEE AND OUTLET EFFLUENT FILTER SANITARY TEE.
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STA absorption treatment area; A = Area S.F.;
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DEPTH TO TOP OF TANK FROM GRADE 15 APPROXIMATELY 12".
A(sf) = Qd x L.F.1 x L.F.2 .: A(sf) = 150 gpd x 1.0 x 0.7 = 175 S.F.
LTAR 0.6 Gal/S.F./day
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4" SCHD 40 PVC SEWER PIPE @ 2°%,
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Number of quick-4 Infiltrator chambers 4'x3'x12"chambers:
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175 S.F. = 14.583 chambers; Installed 15 chambers
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12 S.F./Chamber
Installed 15 Quick-4 Infiltrator chambers in 3 trenches 22' long by 3' wide with 5 chambers units per trench plus
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two end caps as delineated on the plan. The septic tank effluent is gravity distributed to the head of each
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chamber raw via individual distribution pipes from a plastic concrete distribution box with riser and lid set at
RAPHIC SCALE
the surface grade.
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OWTS DESIGN
PLAN
IN FEET j
=
1 inch = 20 ft.
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CONNECT JNDIVI DUAL 4" DISTRIBUTION PIPE
TO HEAD OF EACH CHAMBER TRENCH (TYPICAL
EACH TRENCH).
INSTALL CONNECTION AS NEEDED FROM END OR SIDE INLET
EXTEND 4" RISER PIPE
PORT OF EACH INFILTRATOR CHAMBER END CAP.
MIN. 3" THROUGH END
CAP OR CHAMBER PRE DISTRIBUTION BOX LID
FORMED PENETRATION
CHAMBER END CAP
ATGROUNDSURFACE
6" VALVE BOX 6" VALVE BOX SECURE WITH SCREWS
THROUGH PENETRATION
RISER SECTION
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CAP FLANGE INTO PIPE
BAFFLE
4" DISTRIBUTION
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4" INSPECTION PORT RISER GRAVITY LINE
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4 EFFLUENT PIPE FROM FROM SEPTIC TANK
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DISTRIBUTION BOX Q Q Q
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CHAMBER END CAP CONNECTION DETAIL
4" SOLID PVC GRAVITY
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t!h Vy�STBANK RANCH PI+.P+PIiVED DE �I"'V1 .. aq
N.T.S.
PIPES (TYP.)
TO
TD ABSORPTION FEiLD INVERT IN
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DATE
REVISION
8" AGREGATE BASE COURSE
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QUICK-4 INFILTRATOR COMPACTED SU BGRADE
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QUICK 41NFILTRATOR OR EQUAL BIO DIFFUSER
END CAP CHAMBER DISTRIBUTION BOX DETAIL
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INSPECTION PORT CrONNECTION DETAIL
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DIVERT SURFACE WATER
4" PVC INLET PORT
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BACKFILL WITH SCREENED
ONSITE SOILS FREE OF ROCKS !N EXCESS TOP5QIL LAYS
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OF 3" DIAMETER OR USE 3/4" TO 1.5' � 12"-36"
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TO90°%STANDARD PROC70R FILTER FABRIC LEACHING ��'r
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CHAMBER
BACKFILL LAYER !NATURAL OIIISITE
SOILS FREE OF ROCKS
TITLE
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21853530100
4N. BED EARTH 5AN TY 5
SILTLDANi5C1IL.
OWTS
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SUITABLE BACKFILL DR SCARIFY TILL BOTTOM SURFACE TO A DEPTH
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CLASS 6 ROAD BASE OF 3" AND PLACE MIN, 3" OF A5TM-33
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RECORD
DRAWING
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SAND LEVELING COURSE. NOTE: ALL CHAMBERS IN ERCF! TRENCH MUST BE INSTALLED ON LEVEL
COMPACTED 5UBGRADE
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a18535423007
GRADE OVER 3" ASTM-33 FILTER SAND LEVELING COURSE.
MAXIMUM DEPTH OF TRENCHES NOT TO EXCEED 36" BELOW PROPOSED
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TRENCH CROSS-SECTION FOR SilRFACE GRADES. INLET AND END CAPS ARE TO BE INSTALLED ON EACH
END CHAMBER ROW. IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE
Know what's below.
DRAWING NO.
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SDR-35.26 OR SCHD-40 PIPES ENCOUNTERED IN ANY PART OF THE EXCAVATION, OVER EXCVATE AND
Call before dig.
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218530100
BACKFILL WITH SAND OR SUITABLE SCREENED NATIVE SOILS.
CALL 2-BUSINESS DAYS ADVANCE
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SITE FEATURE AERIAL
MAP
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BEFORE YOU CIIG, GRADE, OR EXCAVATE
DIG,
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PREVIOUS SUB-DIV PLAT
CHAMBER TRENCH CROSS SECTION DETAIL
FORTHEMARKINGOFUN6ERGRl7UNs7
MEMBER UTILITIES
N.T.S.