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GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT
108 Eighth Street, Suite 201
Glenwood Springs, Coloradof 81601
Phone (970) 945-8212
INDIVIDUAL SEWAGE DISPOSAL PERMIT
PROPERTY
Owner's Name, ,n
System Location
Jc�hn�SQ�dra
Legal Description of Assessor's Parcel No
SYSTEM DESIGN
S
Permit
4008
Assessor's Parcel No.
Present Address IC. -..r `CA l
40
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r9/R7-a93-oo -nag'
Septic Tank Capacity (gallon) Other
Percolation Rate (minutes/inch) Number of Bedrooms (or other)
Required Absorption Area - See Attached
Special Setback Requirements:
Date
This does not constitute
e building or use permit.
9LA5-sant
Phone r R4
9-3
X143` 5 --PO
Inspector
FINAL SYSTEM INSPECTION AND APPROVAL (as installed)
Call for Inspection (24 hours notice) Before Covering Installation
System Installer
Septic Tank Capacity
Septic Tank Manufacturer or Trade Name
Septic Tank Access within 8" of surface
Absorption Area
Absorption Area Type and/or Manufacturer or Trade Name
Adequate compliance with County and State regulations/requirements
Other [[//))►► �/ f
Date at 6' — 7110 / Inspector 9,0.021 4-tg
RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE
*CONDITIONS:
1. All installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapter
25, Article 10 C.R.S. 1973, Revised 1984.
2. This permit is valid only for connection to structures which have fully complied with County zoning and building requirements. Con-
nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automatically be a violation or a
requirement of the permit and cause for both legal action and revocation of the permit.
3. Any person who constructs,alters, or installs an individual sewage disposal system in a manner which involves a knowing and material
variation from the terms or specifications contained in the application of permit commits a Class I, Petty Offense ($500.00 fine —6
months in jail or both).
White - APPLICANT Vakw - nFPARTtarn r
INDIVIDUAL SEWAGE. DISPOSAL SYSTEM APPLICATION
OWNER J Oyth Sa-, 24., i n 44„ /Lc nA—
ADDRESS 133n. kncfl1I Neu? G x add PHONE gy.Ss' ,(
CONTRACTOR UV.S�ItR�-
ADDRESS PHONE
PERMIT REQUEST FOR' ( NEW INSTALLATION ( ) ALTERATION ( ) REPAIR
Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable
building, location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4).
LOCATION OF PROPOSED FACILITY: n ^ A
Near what City of Town G fen.w o od -WO h Size of Lot /S , PI VS A4i�e%�-_
Legal Description or Address 13 3 t� k inoC.Q,! ! a R. 1 ! 9 6-! e auxnX 3 CO SI& U/
WASTES TYPE: b4 DWELLING
( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES
( ) OTHER—DESCRIBE
( ) TRANSIENT USE
BUILDING OR SERVICE TYPE: 5) f ho e l << &5' — ` ` D `-C
Number of Bedrooms 3 111 Number of Persons
( ) Garbage Grinder (4 -Automatic Washer ( ) Dishwasher
SOURCE AND TYPE OF WATER SUPPLY: (►WELL ( ) SPRING ( ) STREAM OR CREEK
If supplied by Community Water, give name of supplier:
DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: alr{"._ a m 11 yes
Was an effort made to connect to the Community System? Nib
b
A site plan is required to be submitted that indicates the following MINIMUM distances:
Leach Field to Well: 100 feet
Septic Tank to Well: 50 feet
Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet
Septic System (septic tank & disposal field) to Property Lines: 10 feet
YOUR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE ISSUED WITHOUT
A SITE PLAN.
GROUND CONDITIONS:
Depth to first Ground Water Table
Percent Ground Slope
TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED:
( V SEPTIC TANK ( ) AERATION PLANT ( ) VAULT
( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE
( ) PIT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE
( ) CHEMICAL TOILET( ) OTHER -DESCRIBE
FINAL DISPOSAL BY:
( "f ABSORPTION TRENCH, BED OR PIT ( ) EVAPOTRANSPIRATION
( ) UNDERGROUND DISPERSAL ( ) SAND FILTER
( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND
( ) OTHER -DESCRIBE
WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? N c
PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the
Percolation Test)
Minutes per inch in hole No. 1 Minutes per inch in hole No. 3
Minutes per inch in hole No. 2 Minutes per inch in hole No. _
Name, address and telephone of RPE who made soil absorption tests:
Name, address and telephone of RPE responsible for design of the system.
Applicant acknowledges that the completeness of the application is conditional upon such further mandatory and
additional tests and reports as may be required by the local health department to be made and furnished by the applicant
or by the local health department for purposed of the evaluation of the application; and the issuance of the permit is
subject to such terms and conditions as deemed necessary to insure compliance with rules and regulations made,
information and reports submitted herewith and required to be submitted by the applicant are or will be represented to
be true and correct to the best of my knowledge and belief and are designed to be relied on by the local department of
health in evaluating the same for purposes of issuing the permit applied for herein. I further understand that any
falsification or misrepresentation may result in the denial of the application or revocation of any permit granted based
upon said application and in legal action for perjury as provided by law.
Signed
PLEASE DRAW
Date 07
A CURATE MAP TO YOUR PROPERTY!!
September 7, 2004
John Anderson
1332 Kindall County Road 119
Glenwood Springs, CO 81601-9313
RE: Anderson Residence ADU — Proposed OWS System, 1332 Kindall (County Road 119),
Spring Valley, Garfield County, CO
SE Job No. 24129.01
Dear John
Pursuant to your request this letter/report presents our findings in regard to the feasibility and design of an
engineered Onsite Wastewater System (OWS) for the above referenced Site. This design is based on our
evaluation of the site conditions with information provided by others for use in supporting your Special
Use Permit and Septic Permit Applications to Garfield County. Our recommendations are in accordance
with Garfield County and the State of Colorado ISDS Regulations. Garfield County must permit any
proposed improvement to the site. We have reviewed the information forwarded to us, conducted a site
visit, formulated an OWS design and created a site plan with construction details as part of our scope of
work.
Conclusions
Based on our findings we believe that the design and installation of an approved OWS system is feasible in
accordance with the Regulations of Garfield County and the State of Colorado. We recommend that a
new 1000 gallon septic tank be installed that will discharge effluent to a 400 square foot soil absorption
trench system. The soil absorption system can be installed in natural soils and will be located within the
required setbacks cross gradient to the proposed house, as delineated on the attached plan. The system will
meet all required setbacks and be installed within the general boundaries indicated on the plan. Our
Design is outlined below and delineated on the attached site plan.
Site Location and Existing Conditions
The subject site is located in Spring Valley, at 1332 Kindall Road (County Road 119), in Garfield County,
Colorado. The site is situated in Section 29, T 6 S, R 88 W of the 6`h P.M. The Site comprises
approximately 5.75 acres. The site is bounded on the north, east and south by agricultural lands with
scattered single-family homes and out buildings. The site is bounded on the east by County Road 119.
The site is located on agricultural land. The site has a gentle slope (3%-5%) westward toward the Spring
Valley drainage. The existing ground surface in the proposed septic area has an approximate slope of 4%.
The site is covered with pasture grasses. Domestic water will be supplied by a new onsite well. The
general vicinity of the absorption field will be at least a 100' from the well.
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-03114 Fax (970) 704-0313
SorRIs ENGINEERING LLC
civil consultants
John Anderson
SE Job No. 24129.01
September 7, 2004
Page 2
Proposed Site Conditions
It is our understanding that you intend to construct a 1500 S.F. 3 -bedroom. The maximum number of
rooms to be utilized as bedrooms in the structure is 3. The proposed improvements will include a new
OWS system with appropriate site grading. The new structure is to be generally located as shown on the
plan sketch.
Subsurface Conditions
Sopris Engineering has observed recent excavations on the site. The subsoil encountered at the site consists
of 1/2 foot of topsoil overlying 3-6 feet of silty to sandy clay and/or sandy silt overlying calcareous silty
sand and gravel and cobbles to an observed depth of 8 feet. The soils are consistent in the excavations
observed. Groundwater was not encountered in the excavations. Based on the observed site and soil
conditions we assume that the seasonal high ground water may be approximately 6- 8 feet below the
surface.
Sopris Engineering has recommended that percolation testing be performed during the excavation of the
absorption field. Based on our observations and the soil structure we assume a percolation rate between
30-40 minutes per inch. We are using 45 minutes per inch for design purposes. The soils are suitable for a
conventional absorption system.
Additional geotechnical evaluations and inspections by the engineer will be performed during initial stages
of construction to verify assumptions made for the OWS design. The evaluations and inspections may
result in modifications to the design that may include field size revisions.
Design Criteria
The design flow is calculated as follows:
Single family home — equivalent 3 bedroom population @ 2 person /bedroom = 6 persons.
From the Garfield County I. S. D. S. Regulation:
Max. Design flow (Qd) = # of people x (avg. flow) x 1.5 gal/person/day.
Gallons per day per person for the subject house = 75 gal/person/day
Assume 6 -person population
Qd = 6*75*1.5* =675 gal/day
Septic Tank Design
Based on Design Flow Qd.
Qd = 675 gal/day
Volume (V) of tank = Design Flow * 1.25
(30 hour retention time)
V = 675 gal/day * 1.25 days = 844 gallons
Use one 1000 -gallon dual compartment concrete septic tank
John Anderson
SE Job No. 24129.01
September 7, 2004
Page 3
Soil Absorption System Design
The field is sized by using the standard absorption area equation. A soil absorption trench system,
utilizing gravelless chambers is recommended. The State allows a 50% area reduction for the use of
gravelless infiltration chambers in a trench configuration. The chamber units may be installed in native
soils. Soil replacement with sand may be used in select locations if any scattered cobbles or rocks are
encountered. We are using 40 minutes/inch for design to account for permeability through the biomat.
Based upon the design percolation rate, the standard absorption area equation is:
A (SF) = Qd *(t)'1
: where A = Area; Qd = Design flow (gal/day)
5 t = time in minutes
This design calculation results in a recommended minimum absorption area:
A = 675 *(45) '1 = 905 sq. ft.
5
Apply a 50% reduction for utilizing gravelless infiltration chambers in a trench configuration.
905 x 0.5 = 452 sq. ft.
Use trenches with gravelless leaching chambers: Assume 3 -foot wide trenches with 6.25 -foot long chamber
units.
Assume 15.5 square feet per chamber: 452 sq.ft. = 29chambers Use 30 chambers
15.5 sq.ft/chamber(50%)
We recommend using a trench system composed of 2 trenches 94 feet long and 3 foot wide, containing 15
standard leaching chamber units in each trench. Or 3 trenches 63 feet long and 3 foot wide, containing
10 standard leaching chamber units in each trench. Excavate absorption trenches to accommodate a
minimum 465 SF of interior surface area.
Effluent Distribution System
A gravity distribution system will be utilized to transport effluent from the new concrete septic tank to a
distribution box and to the head chamber of each trench via an individual distribution line. An effluent
filter will be installed in the secondary compartment of the septic tank to reduce suspended solid loading to
the absorption trenches and extend the life of the treatment media in the trenches. A 4" PVC effluent line
will discharge effluent to a distribution box installed level, up gradient and adjacent to the trenches. The
4" PVC line will be installed with a minimum 2% slope. The effluent will be equally distributed from the
distribution box through individual distribution pipes to each trench in the system. The inlet in the
distribution box should have a tee or a built in baffle to dissipate the influent velocity and insure equal
distribution into each outlet discharge pipe. The discharge pipes will connect to the head of each chamber
row. Appropriate chamber end plates shall be installed on the inlet ends to prevent scouring of the trench
bottom surface. An inspection port should be installed on the top mid -point cut out at the end chamber in
each trench. This will allow for checking the performance of the system over time.
John Anderson
SE Job No. 24129.01
September 7, 2004
Page 4
OWS Operation and Maintenance
The engineered system shall be inspected on a regular basis and be properly maintained. The
responsibility for repair and maintenance of the system will remain with the Lot Owner. The owner shall
inspect the OWS and perform maintenance and repairs necessary to ensure that the system is operating
properly. The effluent filter shall be maintained when the tank is pumped or as needed. Suitable
component handles and extensions on the filter assembly will be installed to provide easy maintenance.
We recommend a periodic inspection be performed every 6 months.
The OWS system should require minimal maintenance. Several factors influencing the need for
maintenance include: actual wastewater flows versus design flows, the volume of kitchen/domestic waste
(excluding human waste and toilet paper), excessive household chemicals and other toxic liquids. The
tank, dispersal field and other applicable treatment system components should be visually inspected bi-
annually for debris, wear, damage, leaks, or other potential problems. In general, for a properly utilized
system, septic tanks should be pumped and inspected every 2 - 4 years. The effluent filters should be
cleaned every six months and at the time of pumping. Absorption fields should be maintained with
suitable cover and kept free of root invasive plants. Positive surface drainage away from the absorption
field should be maintained.
Construction and Inspections
Prior to construction of the permitted system the engineer should be contacted by the contractor and owner
well in advance to provide adequate time to discuss the system components with the contractor, answer
questions, resolve any conflict issues and schedule inspection site visits based on construction progress.
County Regulations require that the Design Engineers of record perform site inspections of the permitted
system during construction and provide "As -Built" documentation of the installed system to the County
after construction is complete.
General Notes
1) All materials and installation practices shall conform to the Garfield County Individual Sewage
Disposal Regulation.
2) All sewer lines and distribution lines in the system shall be 4" Schedule 40 or SDR -35 PVC unless
specified otherwise on the plans.
3) Add a two-way clean out on the service lines from the house and detached bam.
4) The system shall be plumbed to distribution effluent into the trenches with equal distribution.
5) The contractor shall ensure that the concrete septic tank and sewer lines are watertight.
6) The trench area must be protected to prevent damage from vehicular or livestock traffic and must be
crowned to divert drainage runoff away from the trenches to minimize surface infiltration.
7) The leaching chambers shall be installed level in each trench. A splash plate shall be installed on the
trench bottom surface below the inlet in each trench to prevent scouring from the effluent. The top of
the backfill over the chambers shall be covered with filter fabric or other suitable pervious material to
prevent the migration of fines from the overlying topsoil layer.
1
John Anderson
SE Job No. 24129.01
September 7, 2004
Page 5
8) The trenches must have a minimum cover of 12 inches. A final cover of topsoil suitable for vegetation,
a minimum 4" deep, shall be placed from the top of the pervious cover layer to the finished surface
grade.
9) The absorption trenches must be sodded or covered with vegetative ground cover.
Our design and recommendations are based upon data supplied to us by others. If subsurface or site
conditions are found to be different from those presented in this report, we should be notified to evaluate
the effect it may have on the proposed OWS.
If you have any question or need any additional information, please call.
Sincerely,
SOPRIS ENGINEERING, LLC
Projec gger