HomeMy WebLinkAboutApplication- PermitGARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT Permit
109 8th Street Suite 303
Glenwood Springs, Colorado 81601
Phone (303) 945-8212
INDIVIDUAL SEWAGE DISPOSAL PERMIT
PROPERTY
t
Owner's Name Wu, tt n
I
System Location
Legal Description of Assessor's arcel No.
SYSTEM DESIGN
Present Address
N° - - 3998
Assessor's Parcel No.
This does not constitute
a building or use permit.
Septic Tank Capacity (gallon)
Percolation Rate (minutes/inch)
Required Absorption Area - See Attached
Special Setback Requirements:
Date
Other
Number of Bedrooms (or other)
374- q91 4
Lipo (07Lit°
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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
Date Inspector
RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE P
isckatit
CONDITIONS:
1 All installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapte
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 Yellow - DEPARTMENT
OWNER
INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION
WOO/ YvUo s —
ADDRESS T 4-3 ge PHONE q y oo'y
CONTRACTOR KP N1.),12
CZA-0-frac_ a LT b
ADDRESS 02-I 14 oM e PL_ &- r ) s
PHONE V741 y q q,2 q
PERMIT REQUEST FOR (V)<EW 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:
Near what City of Town (' A r F10,-) c(A-te Size of Lot ICI AcveS
Legal Description or Address li ear r _ 03 a q (,J ;, i VY\'1- t3 . i2a', I
WASTES TYPE: (V/4DWELLING ( ) TRANSIENT USE
( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES
( ) OTHER—DESCRIBE
fa•C
BUILDING OR SERVICE TYPE:
Number of Bedrooms
(Garbage Grinder
1t
thAtilo
Number of Persons
(✓Automatic Washer
a
(hwasher
SOURCE AND TYPE OF WATER SUPPLY: (1/) WELL ( ) SPRING ( ) STREAM OR CREEK
If supplied by Community Water, give name of supplier:
DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: 300D
Was an effort made to connect to the Community System? e-5
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 F INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED:
( SEPTIC TANK ( ) AERATION PLANT ( ) VAULT
( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE
( ) PIT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE
( ) CHEMICAL TOILET( ) OTHER -DESCRIBE
FI 4 'DISPOSAL BY:
(S/)) 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? P 0
PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the
Percolation Test)
Minutes t per inch in hole No. 1 Minutes 1 3 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: 1-( P GesTerl, CO A ^ (4114nc( r.)
Name, address and telephone of RPE responsible for design of the system: p r, S E r metv5 ?NJ/ e)T ( pc
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
PT PASF DRAW AN ACCURATE
Date 76 ) (o
TO YOUR PROPERTY!!
June 10, 2004
Steve Kennedy
Kennedy Construction
0233 Homeplace
Glenwood Springs, CO 81601
RE: Proposed OWS System, Lot 36, River Valley Ranch, Garfield County, CO
SE Job No. 24092.01
Dear Steve:
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 application
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 2000 gallon septic tank be installed that will discharge effluent to a 651 square foot soil absorption
trench system. The soil absorption system can be installed in natural soils and will be located within the
required setbacks down gradient of 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 on Lot 36 in the River Valley Ranch in Garfield County, Colorado. The site is
situated in Section 4, T 8 S, R 88 W of the 6th P.M. The Site comprises approximately 170 acres. The site
is bounded on the north, South and west by agricultural and range lands with scattered single-family homes
to the east. The Building envelope on the site has gentle slopes (3%-12%) toward the north. The site is
covered with pasture grasses, weeds, sagebrush, juniper and pinon trees. Domestic water will be supplied
by the Town of Carbondale.
Proposed Site Conditions
It is our understanding that you intend to construct a 4 -bedroom home. The maximum number of rooms in
the proposed home that could be utilized as bedrooms is 6. 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.
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311• Fax (970) 704-0313
SOPRIS ENGINEERING LLC
civil consultants
Steve Kennedy
SE Job No. 24092.01
June 10, 2004
Page 2
Subsurface Conditions
A subsurface investigation and percolation test was conducted in April 15, 2004 by Hepworth-Pawlak
Geotechnical, Inc (HP). The subsoil encountered at the site consists of 1 foot of topsoil overlying 3 feet of
sandy, silt and clay overlying sandy gravel with cobbles to an observed depth of 8 feet. Groundwater was
not encountered in the profile pit excavation.
Percolation testing utilized three test holes, which yielded similar absorption rates. The fastest measured
rate was 8 minutes per inch and the slowest measured rate was 16 minutes per inch. The average
percolation rate is 12 minutes per inch and should be suitable for a conventional absorption system.
Design Criteria
The design flow is calculated as follows:
Single family home — equivalent 6 bedroom population @ 2 person /bedroom = 12 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.
Gallonsr day per person for the subject house = 75 gal/person/day
AssumedSLperson population
Qd = 12*75*1.5* =1350 gal/day
Septic Tank Design
Based on Design Flow Qd.
Qd = 1350 gal/day
Volume (V) of tank = Design Flow * 1.25
(30 hour retention time)
V = 1350 gal/day * 1.25 days = 1688 gallons
Use one 2000 -gallon dual compartment concrete septic tank
Steve Kennedy
SE Job No. 24092.01
June 10, 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 20 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) 1/2 : where A = Area; Qd = Design flow (gal/day)
5 t = time in minutes
This design calculation results in a reconunended minimum absorption area:
A = 1350 *(20) 1 = 1207 sq. ft.
5
Apply a 50% reduction for utilizing gravelless infiltration chambers in a trench configuration.
1207 x 0.5 = 604 sq. ft.
Assume 15.5 square feet per chamber: 470 sq.ft. = 39 chambers Use 42 chambers
15.5 sq.ft/chamber(50%)
Use 651 SF of trench with gravelless chambers: Assume 3 -foot wide trenches with 6.25 -foot long chamber
units.
We recommend using a trench system composed of three 88 feet long and 3 foot wide trenches, containing
14 standard leaching chamber units in each trench. Excavate absorption trenches to accommodate a
minimum 651 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 corner trench. This will mark the field and allow for checking the performance of the system over
time.
Steve Kennedy
SE Job No. 24092.01
June 10, 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 perforin 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 barn.
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.
4
Steve Kennedy
SE Job No. 24092.01
June 10, 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
Paul E. Rutledge
Design Engineer
Yancy Nichol, P.E.
Project Engineer
September 21, 2004
Steve Kennedy
Kennedy Construction
0233 Homeplace
Glenwood Springs, CO 81601
RE: As -Built OWS System, Lot 36, River Valley Ranch, Garfield County, CO
SE Job No. 24092.01
Dear Steve:
Pursuant to County Regulations, this letter provides documentation that the new OWS system recently installed is in general
compliance with the permitted design. Sopris Engineering has performed site visits to measure, inspect, and document the as
built conditions of the constructed system. The system was inspected prior to backfilling and after all installations were
completed. The as -built conditions and installation of the new OWS components is in compliance with the permitted design
specifications for the system.
The septic tank, distribution pipe, and absorption field installations are in accordance with Garfield County Regulations, the
design presented in the Sopris Engineering Report and the design drawing, dated June 10, 2004. A 2000 gallon dual
compartment septic tank was installed with 4" tee baffles and an effluent filter.
The absorption field was constructed with a total of 42 standard leaching chambers in a trench configuration with (3) 88'long
trenches containing 14 chambers each. The chambers were backfilled with native soil. Each trench was installed level.
Inspection ports were installed on each corner end chamber. The chambers were installed in suitable soils consistent across the
field. The field has individual distribution lines to each trench from a concrete distribution box. The distribution box was
installed level on compacted ground and is marked with a buried piece of rebar. The minimum setback distances have been
maintained. Additional observations of the soils within the field were performed during construction indicating that the soils are
consistent with the description in the geotechnical report. No ground water was encountered to a depth of 10 feet.
OWS Operation and Maintenance
All components of the engineered OWS shall be inspected on a regular basis and be properly maintained. The re establishment
of vegetative cover over the field and responsibility for inspection and maintenance of the system will remain with the Lot
Owner or the owners representative. The owner shall periodically inspect the OWS and to perform all maintenance and repairs
as necessary to ensure that the system is in good operating condition and performing as designed.
The OWS 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, sanitary tees and effluent filter should be visually inspected bi-annually for
clogging debris, 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 filter should be cleaned every six months and at the time of pumping.
Absorption fields should be maintained with suitable vegetative cover and kept free of root invasive plants. Positive surface
drainage away from the absorption field should be maintained.
If you have any question or need any additional information, please call.
Sincerely,
SOPRIS ENGINEERING. LLC
au l E. Ruti
Design Engineer
oe
502 Main Street • Suite A3 • Carbondale, CO 81623
• (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERING LLC
civil r..nnsuitants