HomeMy WebLinkAbout2500 Cedar Dr - 246704401001INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT
EAGLE COUNTY ENVIRONMENTAL HEALTH DIVISION
P.O. Box 179 - 500 Broadway • Eagle, CO 81631
Telephone: (970) 328-8755
COPY OF PERMIT MUST BE POSTED AT INSTALLATION SITE. PERMIT NO. 2147A-01 BP NO. 13907
OWNER: TIM EVEN PHONE: 970-927-2481
MAILING ADDRESS: P.O. BOX 872, BASALT, CO 81621
APPLICANT: SAME PHONE:
SYSTEM LOCATION: 2500 CEDAR DRIVE, BASALT, CO 81621 TAX PARCEL NO. 2467-044-00-012
LICENSED INSTALLER: TIM EVEN MASONRY, TIM EVEN LICENSE NO. 72-01 PHONE: 970-927-2481
DESIGN ENGINEER: CRONK CONSTRUCTION INC., THOMAS A. CRONK PHONE NO. 970-245-0577
INSTALLATION HEREBY GRANTED FOR THE FOLLOWING: MINIMUM REQUIREMENTS FOR A 2 BEDROOM RESIDENCE
1000 GALLON SEPTIC TANK 775 SQUARE FEET OF ABSORPTION AREA CREDIT, VIA 25 INFILTRATOR UNITS. AS PER ENGINEER'S DESIGN.
SPECIAL REQUIREMENTS: INSTALL AS PER ENGINEER'S DESIGN REVISIONS DATED 11-06-01, IN SERIAL DISTRIBUTION WITH A CLEANOUT BE-
TWEEN THE TANK AND THE HOUSE, AND INSPECTION PORTALS IN EACH TRENCH. RAKE ALL TRENCH SURFACES TO PREVENT THE SMEARING OF
SOILS, AND DO NOT INSTALL IN WET WEATHER. THE EXISTING TANK MUST BE PUMPED OUT AND FILLED WITH DIRT, OR REMOVED FROM THE
PREMISES. CALL EAGLE COUNTY ENVIRONMENTAL HEALTH AND THE DESIGN ENGINEER FOR FINAL INSPECTION PRIOR TO BACK FILLING
ANY PART OF THE INSTALLATION, OR WITH ANY QUESTIONS. THE BUILDING CERTIFICATE OF OCCUPANCY WILL NOT BE ISSUED UNTIL
THE SEPTIC SYSTEM HAS BEEN INSPECTED AND APPROVED.
ENVIRONMENTAL HEALTH APPROVAL: LAURA FAWCETT DATE: NOVEMBER 16.2001
CONDITIONS:
1. ALL INSTALLATIONS MUST COMPLY WITH ALL REQUIREMENTS OF THE EAGLE COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM REGULATIONS,
ADOPTED PURSUANT TO AUTHORITY GRANTED IN 25-10-104, 1973, AS AMENDED.
2. THIS PERMIT IS VALID ONLY FOR CONNECTION TO STRUCTURES WHICH HAVE FULLY COMPLIED WITH COUNTY ZONING AND BUILDING
REQUIREMENTS. CONNECTION TO, OR USE WITH ANY DWELLING OR STRUCTURE NOT APPROVED BY THE ZONING AND BUILDING DEPARTMENTS SHALL
AUTOMATICALLY BE A VIOLATION OF A REQUIREMENT OF THE PERMIT, AND WILL RESULT IN BOTH LEGAL ACTION AND REVOCATION OF THE PERMIT.
3. CHAPTER IV, SECTION 4.03.29 REQUIRES ANY PERSON WHO CONSTRUCTS, ALTERS OR INSTALLS AN INDIVIDUAL SEWAGE DISPOSAL SYSTEM TO
BE LICENSED.
FINAL APPROVAL OF SYSTEM (TO BE COMPLETED BY INSPECTOR):
NO SYSTEM SHALL BE DEEMED TO BE IN COMPLIANCE WITH THE EAGLE COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM REGULATIONS UNTIL THE SYSTEM
IS APPROVED PRIOR TO COVERING ANY PORTION OF THE SYSTEM.
INSTALLED ABSORPTION OR DISPERSAL AREA: 400 SQUARE FEET OF ACTUAL ABSORPTION AREA VIA TWO (2) ROWS OF 20 EACH QUICK-4
INFILTRATOR UNITS IN A TRENCH CONFIGURATION.
INSTALLED 1,000 GALLON, TWO -COMPARTMENT PRE -CAST CONCRETE TANK IS LOCATED 90 DEGREES NORTH 7 FEET 0 INCHES
FROM CLEAN -OUT FROM HOUSE.
COMMENTS: RECEIVED ENGINEER'S CERTIFICATION AND AS-BUILTS STAMPED, SIGNED AND DATED JULY 6 2005
ANY ITEM NOT MEETING REQUIREMENTS WILL BE CORRECTED BEFORE FINAL APPROVAL OF SYSTEM IS MADE. ARRANGE A RE -INSPECTION WHEN WORK IS
COMPLETED.
ENVIRONMENTAL HEALTH APPROVAL DATE: JULY 6, 2005
Incomplete Applications Will NOT Be Accepted
(Si:te Plan MUST be attached)
ISDS Permit # JA --
Building Permit # !
APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT
ENVIRONMENTAL HEALTH OFFICE - EAGLE COUNTY
P. O. BOX 179
EAGLE, CO 81631
Eagle (970)328-8755, Fax (970)328-0349, E1 Jebel (970)927-3823
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* FEE SCHEDULE
* PERMIT APPLICATION FEE $150.00
* PERCOLATION TEST/SOIL PROFILE AND SITE EVALUATION FEE $200.00
* SITE VISIT/CONSULTATION FEE $85.00
* REINSPECTION FEE $47.00
* MAKE ALL REMITTANCE PAYABLE TO: "EAGLE COUNTY TREASURER"
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PROPERTY OWNER:
MAILING ADDRESS: iE 0. 6o K O 7 Z IgAs; o1f Kim I. Y W-k PHONE: -AqL j
APPLICANT/CONTACT PERSON: PHONE:
LICENSED SYSTEMS CONTRACTOR: d{/ I r,� &C54Y PHONE:
COMPANY/DBA:
ADDRESS:
PERMIT APPLICATION IS FOR: ( ) NEW INSTALLATION (X) ALTERATION ( ) REPAIR
LOCATION OF PROPOSED INDIVIDUAL SEWAGE DISPOSAL SYSTEM:
Legal Description: Sr-c-f %vJn ?NC, Ygl1-0?3�
0—a0-Dl- f.2�5 �1C��
Tax Parcel umber: - 1 _ Lot Size: _
Physical Address: �� 56 a <e `f' jSp+-,,Ar 4
BUILDING TYPE: (Check applicable category)
(A Residential/Single Family
( ) Residential/Multi-Family*
( ) Commercial/Industrial*
Number
Number
Type _
of Bedrooms 2 ?
of Bedroors oe
*These systems require design by a Registered Professional Engineer
TYPE OF WATER SUPPLY: (Check applicable category)
( ) Well Spring ( ) Surface
Name ( ) Public of Supplier:
APPLICANT SIGNATURE: Date: IZ26 4
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AMOUNT PAID : # 3 �� e� RECEIPT #: UAL � DATE: G 4 f7
CHECK #: l y .� CASHIER-' I,ii�ln !/rim
DEPARTMENT OF
ENVIRONMENTAL HEALTH
(970)328-8755
FAX: (970) 328-8788
TOLL FREE:800-225-6136
www.eaglecounty.us
August 3, 2005
Mr. Tim Even
P. O. Box 872
Basalt, Colorado 81621-0872
EAGLE COUNTY
RAYMOND P. MERRY, REHS
Director
RE: Final approval of Individual Sewage Disposal System Permit #: IS-2147A-01;
Tax parcel #: 2467-044-000-12; Property location 2500 Cedar Drive, Basalt
Dear Mr. Even:
This letter is to inform you that the above referenced ISDS Permit has been inspected and
finalized. Your septic system has been sized to accommodate (2) bedrooms. Enclosed is a copy
to retain for your records along with a brochure regarding the care of your septic system.
Additional information about the maintenance of your septic system as well as information about
private wells can be accessed through our web site links we've provided in the Environmental
Health Department's page, http://www.ea-glecogpiy.us/envHealth/
Be aware that changes in the use of your property or alterations of your building may require
commensurate changes to, or relocation of, your septic system. Landscape features, trees with
tap roots, irrigation systems and parking areas above the drain field can cause premature system
failure. It is equally important that you notice and immediately repair dripping faucets and
hissing toilets as this will certainly cause the system to fail. By following a few simple
guidelines, like avoiding grease or other additives down the drain and making sure your septic
tank is on a pumping schedule, you system has been designed to last for many years.
If you have any questions regarding this information, please contact us at (970) 328-8755.
Sincerely,
Lori Siefers, A inistrative Technician IV
cc: ISDS permit folders
Chronological folder
Cronk Construction, Inc.
Eagle County Building Department
Encl: Final ISDS Permit
Informative materials
Copies of pertinent photos from the final inspection
Copy of engineer design and as -built drawings
500 Broadway, P.O. Box 179, Eagle, Colorado 81631-0179
DEPARTMENT
ENVIRONMENTAL HEALTH
970)328-8755
FAX 970) 328-8788
TDD! (970) 328-8797
}� .�LL FREE 80_725-8 € 36
vvo'v".eagle-cOunty.cam
EAGLE C t lid I . � CAL , - D
Date: Noveniber 16, 20()1
TO: Tien Even IN'lasonry, Inc.
T °!-Tiond P. Karrv, REHS
FR0_NI: Environmental Health Division
RE: Issuance of Individual Sewage Disposal System ,alteration Permit No.215 7 A-f)1.
Tax Parcelµ 46711-044-(l{_)-01?. Property Location: 2 )00 Cedar Drive, Basalt,
CO., E�ren residence.
Enclosed is your ISDS Alteration Permit No. ? 15 . A-(_)1 and a field copy orthe engineer design
stipulated on the permit. It is \`alid for 120 dais, or for the duration of your current buildinu
permit for this property. The enclosed copy of the pennit must be posted at the installation site.
Any changes in plans or specifications invalidates the hermit unless otherwise approved.
Please note any special requirements that may have been added to the design by this
department.
Systems designed by a Registered Professional Engineer must be certifiers by the Enoineer
indicating that the system was installed as specified. Eagle County Environinental Health
must also view the installation prior- to back ftllin(j. Please calf well in advance for your
final inspection. Your TCO will not be issued until our office receives this certification
from the engineer, and views the installation.
Permit specifications are minilnrRm requirements only, and should he hrou ht to the property
owner's attention.
'I'his permit does not indicate conformance with other Eagle Count- requirements. Please
notify this office if you have not been contracted to perform this installation.
Ifvou have any questons, please feel free to contact the Env- Health i>>�'ision at t?
cc: tl1cs
Cronit C011-Strrtction Incorporated. Thomas A. C'ronl
OLD COURTHOUSE EJ([_.DIINC. 5I L y P -. R ,,
;4 179. Ea' ,'- lu. i—_ ',6�. . .
Hepworth-Pawlak Geotechnical, Inc.
5020 County Road 154
Glenwood Springs, Colorado 81601
Phone: 970-945-7988
Fax: 970-945-8454
hpgeo@hpgeotech.com
September 20, 2001
Tim Even
P.O. Box 872
Basalt, Colorado 81621 Job No. 101 556
Subject: Subsoil Study for Foundation Design, Proposed Residence, 2500 Cedar
Drive, Northeast of Basalt, Eagle County, Colorado
Dear Mr. Even:
As requested, Hepworth-Pawlak Geotechnical, Inc. performed a subsoil study for
design of foundations at the subject site. The study was conducted in accordance with
our agreement for geotechnical engineering services to you dated August 1, 2001. The
data obtained and our recommendations based on the proposed construction and
subsurface conditions encountered are presented in this report.
Proposed Construction: The proposed residence will be single story plus a loft and
located next to the existing residence. Ground floor will be slab -on -grade. Cut depths
are expected to be minor, between about 2 to 3 feet, due to the hard rock in the.
subsurface. Foundation loadings for this type of construction are assumed to be
relatively light and typical of the proposed type of construction.
If building conditions or foundation loadings are significantly different from those
described above, we should be notified to re-evaluate the recommendations presented in
this report.
Site Conditions: The proposed building site is located on a broad ridge to the west of
the existing house. There was about 6 feet of elevation difference between the pit
locations. Vegetation consists of scattered brush and trees.
Subsurface Conditions: The subsurface conditions at the site were evaluated by
excavating 3 exploratory pits at the approximate locations shown on Fig. 1. The logs of
the pits are presented on Fig. 2. The subsoils encountered, below about 1 to 11/2 feet of
topsoil, consist of 1/2 to l .foot of loose to medium dense silt and sand overlying hard to
very hard siltstone/sandstone bedrock. Digging was very difficult after about 1 foot
into the formation rock. No free water was observed in the pits at the time of
excavation and the soils and rock were slightly moist.
Foundation Recommendations: Considering the subsurface conditions encountered in
the exploratory pits and the nature of the proposed construction, we recommend spread
footings placed on the undisturbed bedrock and designed for an allowable bearing
pressure of 4,000 psf for support of the proposed residence. The upper soils and
Tire Even
September 20, 2001
Page 2
disturbed rock in the foundation bearing areas should be removed to expose the hard
bedrock. Exterior footings should be provided with adequate cover above their bearing
elevations for frost protection. Placement of footings at least 42 inches below the
exterior grade is typically used in this area. The frost depth can be reduced to about 2
feet where bearing is on the very hard formation rock. Continuous foundation walls
should be reinforced top and bottom to span local anomalies such as by assuming an
unsupported length of at least 10 feet. Foundation walls acting as retaining structures
(if any) should be designed to resist a lateral earth pressure based on an equivalent fluid
unit weight of at least 45 pcf for the on -site soil as backfill.
Floor Slabs: The natural on -site soils and the bedrock, exclusive of topsoil, are
suitable to support lightly loaded slab -on -grade construction. To reduce the effects of
some differential movement, non-structural floor slabs should be separated from all
bearing walls and columns with expansion joints which allow unrestrained vertical
movement. Floor slab control joints should be used to reduce damage due to shrinkage
cracking. The requirements for joint spacing and slab reinforcement should be
established by the designer based on experience and the intended slab use. A minimum
4 inch layer of free -draining gravel should be placed beneath basement level slabs to
facilitate drainage. This material should consist of minus 2 inch aggregate with less
than 50% passing the No. 4 sieve and less than 2% passing the No. 200 sieve.
All fill materials for support of floor slabs should be compacted to at least 95 % of
maximum standard Proctor density at a moisture content near optimum. Required fill
can consist of the on -site soils devoid of vegetation, topsoil and oversized rock or
imported granular soils such as road base.
Surface Drainage: The following drainage precautions should be observed during
construction and maintained at all times after the residence has been completed:
1) Inundation of the foundation excavations and underslab areas should be
avoided during construction.
2) Exterior backfill should be adjusted to near optimum moisture and
compacted to at least 95 % of the maximum standard Proctor density in
pavement and slab areas and to at least 90 % of the maximum standard
Proctor density in landscape areas.
3) The ground surface surrounding the exterior of the building should be
sloped to drain away from the foundation in all directions. We
recommend a minimum slope of 12 inches in the first 10 feet in unpaved
areas and a minimum slope of 3 inches in the first 10 feet in pavement
and walkway areas.
4) Roof downspouts and drains should discharge well beyond the limits of
all backfill.
H-P GEOTECH
Tim Even
September 20, 2001
Page 3
Limitations: This study has been conducted in accordance with generally accepted
geotechnical engineering principles and practices in this area at this time. We make no
warranty either expressed or implied. The conclusions and recommendations submitted
in this report are based upon the data obtained from the exploratory pits excavated at the
locations indicated on Fig. 1 and to the depths shown on Fig. 2, the proposed type of
construction, and our experience in the area. Our findings include interpolation and
extrapolation of the subsurface conditions identified at the exploratory pits and
variations in the subsurface conditions may not become evident until excavation is
performed. If conditions encountered during construction appear different from those
described in this report, we should be notified at once so re-evaluation of the
recommendations may be made.
This report has been prepared for the exclusive use by our client for design purposes.
We are not responsible for technical interpretations by others of our information. As
the project evolves, we should provide continued consultation and field services during
construction to review and monitor the implementation of our recommendations, and to
verify that the recommendations have been appropriately interpreted. Significant design
changes may require additional analysis or modifications to the recommendations
presented herein. We recommend on -site observation of excavations and foundation
bearing strata and testing of structural fill by a representative of the geotechnical
engineer.
If you have.any questions or if we may be of further assistance, please let us know.
Sincerely,
'.v- P
HEPWORTH - PA
Steven L. Pawlak, PA
Reviewed by: `''
f
Daniel E. Hardin, P.E.
SLP/ksw
attachments
, INC.
H-P GEOTECH
PIT 2
NOT TO SCALE
HAND SKETCH PREPARED
IN THE FIELD
101 556 1 GEOWEORTH-PLW AK I LOCATION OF EXPLORATORY PITS I Fig. 1 i
PIT 1 PIT 2 PIT 3
ELEV.= 90.8' ELEV.= 87.4' ELEV.= 84.3'
0 0
0-71
WC=4.2 _
F, DD=95
_ j200=63 m
ti
I 5 5 1
s
a 41
a� a
0
10 10
LEGEND:
TOPSOIL; organic silty sandy clay with rock fragments, slightly moist, brown.
SILT AND SAND (ML—SM); rock fragments, loose to medium dense, slightly moist, red —brown.
SILTSTONE—SANDSTONE BEDROCK; hard to very hard. weathered and fractured to very
competent with depth. red —brown, moderate dip down to south.
2" Diameter hand driven liner sample.
Disturbed bulk sample.
_J
NOTES:
1. Exploratory pits were excavated on August 8, 2001 with a backhoe.
2. Exploratory pits were located by client in proposed building area.
3. Elevations of exploratory pits were measured by instrument level and refer to the Bench Mark shown
shown on Fig. 1.
4. The exploratory pit locations and elevations should be considered accurate only to the degree implied
by the method used.
5. The lines between materials shown on the exploratory pit logs represent the approximate boundaries
between material types and transitions may be gradual.
6. No free water was encountered in the pits at the time of excavating. Fluctuations in water level may
occur with time.
7. Laboratory Testing Results:
WC = Water Content ( % )
DD = Dry Density ( pcf )
—200 = Percent passing No. 200 sieve
F
556 HEPWORTH—PAWLAK LOGS OF EXPLORATORY PITS Fig. 2
GEOTECHNICAL, INC.
7T'
C RO N K 1129.24- Road
CONSTRUCTION 0 Grand Junction, CO 81505
INCORPORATED 970-245.0577, 970-257.7453 (fax)
July 6, 2005
CERTIFICATE OF INSPECTION AND ACCEPTANCE
Individual Sewage Disposal System
Even Residence DECEIVED
2500 Cedar
Basalt, CO 81621 JUL 1 4: 2005
2467-044-00-012
ENVIRONMENTAL
HEALTH DEPARTMENT
The individual sewage disposal system of reference was inspected on July 6, 2005. The system was
found to conform with the plans and specifications set forth in the engineered sewage disposal
system design for the aforementioned property prepared on October 16, 2001 and revised on
November 6, 2001 with the following modification approved by the design engineer: forty (40)
Quick 4 Infiltrator units were used instead of twenty-five (25) H-10 Infiltrator units. Copies of the
engineered plan may be obtained from the undersigned design engineer.
Seal
Thomas A. Cronk, P.E.
1129 -24- Road
Grand Junction, CO 81505
970-245-0577
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CRONK 1129.24- Road
CONSTRUCTION 0 Grand Junction, CO 81505
INCORPORATED 970-245.0577, 970.257.7453 (fax)
INDIVIDUAL SEWAGE DISPOSAL SYSTEM DESIGN
Date: October 16, 2001
Revised November 6, 2001
Prepared by: Thomas A. Cronk, P.E.
Cronk Construction Inc.
1129 -24- Road
Grand Junction, CO 81505
245-0577
Type of Design: Repair ISDS Design
Owner: Tim Even
PO Box 872
Basalt, CO 81621
970-927-2481
Property address: 2500 Cedar, Basalt, CO 81621
Tax schedule No.: 2467-044-00-012
Legal Description:
Page 1 of 9
Fol 1.e CoH
1.0 Site History
The site consists of approximately 12.5 acres of uncultivated native soils. Natural drainage in the area of
concern is approximately 8.0% to the south. A perc test/soils evaluation was conducted at the site on
10/04/01 by Tom A. Cronk, registered professional engineer (R.P.E.). A soils observation excavation and
three perc excavations (referred to as excavations A, B, and Q were prepared on the site. The locations of the
soils observation/perc excavations are shown on the attached plot plan.
r The 10/04/01 investigation was intended to develop subsurface design parameters for a repair individual
sewage disposal system (ISDS) to serve a new residence at the property. As based on results from the site
investigation, an engineered ISDS design has been prepared. Results of the perc test/soils evaluation are
attached for reference as Appendix A. A discussion of developed subsurface design parameters and the
engineered ISDS design follows.
2.0 Development of Design Parameters
A soils observation excavation was extended to a depth of 60" below ground surface (BGS). There was no
evidence of ground water or high seasonal water table in the open excavation to a depth of 60" BGS. The soils
evaluation indicates two distinct soil horizons underlie the site. A lithological description follows:
depth in description
0" - 18" sandy silt to silty sand, light red
18" - 60" silty sand with some weathered sandstone, light tan
As based on the results of the perc test (Appendix A), a design perc rate of 30 min/in. is chosen for overall
sizing of a shallow trench absorption field.
Page 2 of 9
3.0 Svstem Desi
A INFILTRATOR trench absorption field is proposed for discharge of septic effluent at the site. Natural
drainage in the area of the proposed absorption trench is approximately 8% to the south. The absorption
trench will be oriented with its length perpendicular to the existing slope as shown on the attached septic layout
plan. Construction of the system will consist of excavating a level trench in the area comprising the absorption
field. The initial excavation shall be continued to a minimum depth of 12" BGS at the downhill side of the
absorption trench (see absorption field cross-section). Because of the slope topography, the trench depth at
the uphill side of the absorption trench will be approximately 15".
Following completion of the initial trench excavation, INFILTRATORS will be used to construct a septic
effluent distribution system in the open excavation. The INFILTRATOR effluent distribution system will be
installed in accordance with the "Infiltrator Technical Manual", available from Infiltrator Systems Inc., 123
Elm Street, Suite 12, Old Saybrook, Connecticut 06475. Adjacent INFILTRATORS shall be fastened with a
minimum of four (4) 3/4" x 48 self -tapping sheet metal or bright brass deck screws to prevent movement and
separation during backfilling. As shown in the Construction Detail, the bottom of the INFILTRATOR seepage
trench will be located 12" below ground level.
Because of the sloping site topography, the absorption trenches must be terraced down the hill side as shown
in the attached septic layout plan. Adjacent infiltrator trenches must be separated by a minimum of 6' (10'-12'
recommended for ease of installation) of undisturbed soil. Septic effluent will be transferred from the upper
trench to the adjacent downhill trench through a serial distribution network as shown in the attached
construction details. The serial distribution connections between adjacent trenches will facilitate the saturation
of the up hill trench before septic effluent is allowed to flow to the adjacent downhill trench.
After installation of the INFILTRATOR trenches has been completed, the absorption field will be covered with
a soil cap. The soil cap will consist of a minimum of 10" of native soil (18" recommended) mounded 5% to
promote surface run off away from the absorption field.
The installer should confirm the feasibility of gravity discharge of sewage effluent from the residence to the
absorption field by field verification of assumed design parameters. Assumed design parameters with respect
to gravity discharge include:
distance from the sewage pipe at exit from the foundation line to the absorption field - 60' or
less,
• elevation of the ground surface at entry to the absorption field shall be at least 10" below the
invert elevation of the sewage pipe at exit from the foundation line.
If field measurements do not confirm these design assumptions, gravity discharge of sewage effluent from the
existing residence to the absorption field can not be assured and a lift pump may be required. Please contact
the design engineer to address any design modifications necessary for effective operation of the ISDS if the
above design assumptions are not upheld.
The installer must also confirm the setbacks from property lines, building envelopes, and existing easements
shown in the attached graphics are maintained. Additionally, any unknown utility lines, easements, or other
adverse conditions disclosed during construction must maintain the required setbacks listed on page 6 of this
Page 3 of 9
document. A minimum of 18" of soil cover is recommended (10" required) for all ISDS elements (excepting
maximum 8" soil cover over septic access ports). Maintaining the required cover may require berm cover over
ISDS components.
An existing ISDS currently serves a residence at the site. The existing residence is to be torn down and the
existing ISDS will be abandoned. Abandonment of the absorption field shall consist of capping the influent
piping followed by abandoning the gravel absorption field in -place. The existing septic tank shall be drained
of residual fluids by pumping and either: 1) physically removed, or 2) filling with structural fill (e.g., gravel,
flowable fill, compacted soil, or concrete) and abandoned in -place.
The new ISDS will serve a two bedroom home with a clothes washer. A 750 gallon (1000 gallon
recommended) septic tank is required for retention of sewage effluent for the proposed two bedroom home.
A non -corrodible filter shall be installed at the final outlet Tee of the septic tank or in the effluent line between
the septic tank and the absorption field to limit the size of solids and sludge passing into the absorption field.
The filter must be accessible for cleaning and replacement from the ground surfacel _
As discussed above, INFILTRATOR absorption trenches are proposed to discharge septic effluent to the
underlying sub -soils. As shown in the attached graphics, the absorption trenches will consist of three (3)
trenches 3' wide x 1' deep. The first trench will be 75' long and contain twelve (12) standard infiltrator units.
The two down gradient trenches will be 68.75' lone and contain eleven (11) standard infiltrator units each for
a total of thirty four (34) INFILTRATORS. The absorption field will encompass a gross area of 637.50 square
feet with an effective area (31 sq. ft. allowed area/INFILTRATOR) of 1,054 sq. ft.
Calculations and design parameters used to size the absorption field follow.
em 0 n- a_k - _ z O Yr�,'
�5o iOft-
Page 4 of 9
DESIGN CALCULATIONS
AVERAGE FLOW FOR 2 BEDROOM HOME @ 150 GAL.IBEDROOM-DAY
2 X 150 = 300 GAL.IDAY
PEAK FLOW = 150% OF AVERAGE = 450 GAL./DAY
DESIGN PERCOLATION RATE = 30.0 MIN.IINCH
LONG TERM APPLICATION RATE = 0.6 GALLONS PER DAYI SQ. FT.
A = Q , WHERE;
LTAR
A = ABSORPTION AREA,
Q = PEAK FLOW,
LTAR = LONG TERM APPLICATION RATE
ABSORPTION AREA (A) = U 66 = 750 SQ. FT.
0
INCREASE ABSORPTION AREA BY 40% FOR CLOTHES WASHER
ADJUSTED ABSORPTION AREA = 750.00 x 1.4 = 1050.00 SQ. FT.
SIZE ADJUSTMENT FACTOR OF 0.5 FOR INFILTRATOR TRENCH SYSTEM
ADJUSTED AREA = 1050.00 X 0.5 = 525.00 SQUARE FEET
USE 34 STANDARD (H-10) INFILTRATORS @ 15.50 SQ. FT. EACH
FOR TOTAL ABSORPTIVE AREA OF 34 X 15.50 = 527 SQUARE FEET
- ABSORPTION FIELD SIZED AT THREE (3) TRENCHES 3 FT. x 212.5 FT. TOTAL
- LENGTH FOR OVERALL TRENCH AREA OF 637.5 SQUARE FEET
Page 5 of 9
4.0 Site Svecific Installation/Operation Requirements
The owner and system contractor shall be aware and comply with the following installation and system
operation requirements.
4.1 Installation - Setbacks, Notifications, and Inspections
All installation activities shall be conducted in accordance with current Eagle County
Environmental Health Department (ECEHD) ISDS Regulations. If at any time during
construction, subsurface site conditions are encountered which differ from the design
parameters developed in Section 2.0. construction activities will stop and the design engineer
will be contacted to address any necessary design modifications.
• installation procedures including grade, location, setbacks, septic tank size, and absorption
field size shall conform with the attached graphic details. Construction activities and system
components will not encroach upon existing easements or utility corridors. A minimum of 10'
of undisturbed soil shall be maintained between individual absorption elements and the septic
tank. Adjacent absorption elements shall maintain a minimum separation of 6'. Minimum
site specific setbacks for system components are:
Source Septic Tank Absorption Field Building Sewer
water line 10' 25' 10'
dwelling 5' 20'
property lines 10' 10'
domestic wells 50' 100' 50'
irrigation ditch
open 50' 50'
lined/gated 25 25'
solid pipe 10' 10'
• To avoid surface flow infiltration and saturation of the new absorption system, abandonment
of flood irrigation within 50' of any ISDS element is required.
• A non -corrodible filter shall be installed at the final outlet Tee of the septic tank or in the
effluent line between the septic tank and the absorption field to limit the size of solids and
sludge passing into the absorption field. The filter must be accessible for cleaning and
replacement from the ground surfaced.
0 All sewer lines and effluent distribution piping shall be 4 inches in diameter and have glued
joints. INFILTRATORS shall be placed level in the absorption field. All lines discharging
sewage from the residence to the septic tank shall maintain fail of between 1 /8 in. and 1 /4 in.
per foot and shall employ sweep 90's or 2-45's at all turns. Sewer lines from the dwelling to
the septic tank and at least 6 ft from the septic tank outlet must meet minimum standard
ASTM-3034. Sewer lines under driveways shall always meet minimum Schedule 40 PVC
standards and shall be encased with corrugated metal pipe when covered with less than 12"
of soil.
Page 6 of 9
• A minimum of 10" of soil cover (18" recommended) shall be maintained over all ISDS
components (excepting maximum 8" cover over septic access ports).
• The installer shall not backfill the open excavation until inspected and approved by the design
engineer. Additionally, the final cover shall not be placed on sewer lines, septic tank, or the
absorption area until the system has been inspected and approved by the design engineer and
as required by the Eagle County Environmental Health Department.
• The installer shall provide 48 hour notice to the engineer and the ECEHD for all required
inspections.
• The effluent distribution system shall be constructed in accordance with the "Infiltrator
Technical Manual' available from Infiltrator Systems Inc., 123 Elm Street, Suite 12, Old
Saybrook, Connecticut 06475.
• Adjacent absorption trenches shall be connected by a serial distribution system to assure the
saturation of up gradient trenches before septic effluent is transferred to down gradient
trenches.
• The surface cap shall be mounded 5% over the absorption field to promote surface runoff.
• The system contractor shall be aware of the potential for construction activities to reduce soil
permeabilities at the site through compaction, smearing, and shearing. The following
precautions and construction procedures should be employed during installation to minimize
disturbance to native soils:
i. Excavation should proceed only when the moisture content of the soil is below the
plastic limit. If a sample of soil forms a rope instead of crumbling when rolled
between the hands it is too wet and should be allowed to dry before excavation
continues.
ii. Excavation and backfill equipment should work from the surface where at all
practical to avoid compaction of the soils at depth.
iii. The bottom and sidewalls of the excavation should be left with a rough, open
surface. The appearance should be that of broken or ripped soil as opposed to a
sheared, smeared, or troweled surface. Any smoothed or smeared surfaces should be
removed with a toothed rake or shallow ripper taking care to remove loose residues
from the bottom of the excavation by hand if necessary.
iv. Care should be taken in placing fill materials in the excavation to avoid damaging the
exposed soil surfaces.
Page 7 of 9
4.2 Operation - Maintenance and Inspections
• The owner shall install a structural barrier if necessary and take precautions to prevent
vehicular traffic, excessive surface watering, accidental flooding, or other activities in the
vicinity of the absorption field which may compact, saturate, or otherwise alter the
subsurface soil parameters used in designing the septic system.
The owner will plant and maintain grass or other shallow rooted cover crop to prevent erosion
and promote evapotranspiration over the absorption field.
0 The owner will inspect and maintain the required mounding and drainage away from the
absorption field to prevent saturation from precipitation and surface flows.
• To mitigate the generation of preferential flow channels which may compromise the operation
of the system, the owner will inspect and prevent intrusion of burrowing animals and deep
rooted plants into the absorption field.
• The owner will conduct periodic maintenance and cleaning of the septic system in accordance
with the following schedule at a minimum:
Type of Component
Inspection and
Cleaned or Pumped
Effluent Testing
Maintenance
septic tank
every 4 years
every 4 years
experimental or
none
vaults, privies
every 4 years
every 4 years
aeration plant
every 6 months
every 8 years
as per WQCC
(state waters)
aeration plant
every 6 months
every 8 years
every 6 months
(surface discharge)
aeration plants
every 6 months
every 8 years
every 6 months
(subsurface dispersal)
aeration plants
every 6 months
every 8 years
every year
(filter trench or bed)
aeration plants
every year
every 8 years
every 2 years
(non -discharge)
filter trenches
every 6 months
every 8 years
experimental or
none
absorption beds
every 6 months
every 8 years
ET beds
every 3 months
every 8 years
pumps, pumping
every 6 months
every 4 years
chambers
Page 8 of 9
5.0 Limitations
This report is a site specific design for installation of an individual sewage disposal system and is applicable
only for the client for whom our work was performed. Use of this report under other circumstances is not an
appropriate application of this document. This report is a product of Cronk Construction Incorporated and
is to be taken in its entirety. Excerpts from this report may be taken out of context and may not convey the
true intent of the report. It is the owner's and owner's agents responsibility to read this report and become
familiar with the recommendations and design guidelines contained herein.
The recommendations and design guidelines outlined in this report are based on: 1) the proposed site
development and plot plan as furnished to Cronk Construction Incorporated by the client, and 2) the site
conditions disclosed at the specific time of the site investigation of reference. Cronk Construction Incorporated
assumes no liability for the accuracy or completeness of information furnished by the client. Site conditions
are subject to external environmental effects and may change over time. Use of this plan under different site
conditions is inappropriate. If it becomes apparent that current site conditions vary from those anticipated, the
design engineer and ECEHD should be contacted to develop any required design modifications. Cronk
Construction Incorporated is not responsible and accepts no liability for any variation in assumed design
parameters.
Cronk Construction Incorporated represents this report has been prepared within the limits prescribed by the
owner and in accordance with the current accepted practice of the civil engineering profession in the area. No
J warranty or representation either expressed or implied is included or intended in this report or in any of our
contracts.
SEAL
Thomas A. Cronk, P.E.
n QP
Date AJA�,,--, 6)
NOTE: This individual sewage disposal plan is meant to include the following four pages of graphics
including:1) plot plan, 2) septic layout plan, 3) absorption field plan view, and 4) absorption field cross
section. The plan is not to be implemented in the absence of these related graphics. In addition, results
from the percolation test and soils evaluation are included for reference as Appendix A.
Page 9 of 9
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APPENDIX A
SOILS AND PERCOLATION REPORT
CRONK CONSTRUCTION INCORPORATED
CRONK 1129.24- Road
CONSTRUCTION Grand Junction, CO 81505
INCORPORATED 970-245.0577, 970.257.7453 (fax)
SOILS AND PERCOLATION REPORT
Date: October 4, 2001
Prepared by: Thomas A. Cronk, P.E.
1129 -24- Road
Grand Junction, CO 81505
245-0577
Client: Tim Even
PO Box 872
Basalt, CO 81621
(970) 927-2481
Property address: 2500 Cedar, Basalt, CO 81621
Tax schedule No.: 2467-044-00-012
Legal Descript.:
1.0 Soils Evaluation
The site consists of approximately 12.5 acres of uncultivated native soil. Drainage is approximately 8% to the
south in the area of reference. A percolation test/soils evaluation was conducted on the property of reference
on 10/04/01 by Tom A. Cronk, registered professional engineer (R.P.E.).
A soils observation excavation was extended to a depth of 60" below ground surface (BGS). There was no
evidence of ground water or high seasonal water table in the open excavation to a depth of 60" BGS. The soils
evaluation indicates two distinct soil horizons underlie the site. A lithological description follows:
depth in. description
0" - 18" sandy silt to silty sand, light red
18" - 60" silty sand with some weathered sandstone, light tan
Perc holes were constructed in excavation A at the surface and at a depth of approximately 26 in. Additional
pert holes were constructed in excavation B at the surface and at a depth of 30 in.; and in excavation C at the
surface and at a depth of 24 in. The holes appeared to be well saturated at the time of the test. Results of the
percolation test are shown in Table 1.
Page A-1 of A-3
TABLE 1
Percolation Test Results
2500 Cedar, Basalt
Depth
Time. on 10104/01
Time.
Drop
Perc
Rate
1 min/in
13:28
14:06
14:28
A 0" - 26"
4.375
11.625
14.0
60/9.625
6
A 26" - 38"
2.5
4.375
5.0
60/2.5
24
B 0" - 24"
5.0
10,75
13.375
60/8.375
7
30" - 40"
2.5
3.75
1 4.5
60/2.0
30
5.5
12.375
14.375
60/8.875
7
3.875
5.5
6.0
60/2.125
28
2.0 Conclusions and Recommendations
Soils at the site appear acceptable for implementation of an individual sewage disposal system (ISDS). The
following site -specific considerations should be observed during implementation of the ISDS:
s The bottom of the ISDS absorption field should be located no deeper than 12" BGS to
maintain 4' of usable infiltration soil above the bedrock subsoils located at 60" BGS. A
design pert rate of 30 min/in. is recommended for overall system sizing.
• Care should be taken during construction to avoid compaction and smearing of the exposed
infiltrative surfaces and preserve the natural permeability of the native soils.
Page A-2 of A-3
3.0 Limitations
This report provides a professional assessment ofthe feasibility of implementing an individual sewage disposal
system on the property of reference. The design parameters developed in this document are representative of
the site conditions disclosed at the specific time of the site investigation. Site conditions are subject to change
from external events both manmade (irrigation or pond construction) and naturally occurring (flooding or
excessive precipitation). Cronk Construction Incorporated is not responsible and accepts no liability for any
variation in assumed design parameters caused by external events.
Crank Construction Incorporated represents this report has been prepared within the limits prescribed by the
owner and in accordance with the current accepted practice of the civil engineering profession in the area. No
warranty or representation either expressed or implied is included or intended in this report or in any of our
contracts.
SEAL
Thomas A. Cronk, P.E. rj
zfz)
s8 A.~i,•s•..cy Date '
Page A-3 of A-3
Post -it" Fax Note 7671
Date
1014
PesTo K
pages
om C ro-yJ<_
From C Cq_" (-& caw
Co./Dept.
Co. &CA co
Phone #
I Phone # 328-87S6.
j777T10,;t'57--7q,S-5j"
328-87F�8
Aq I/?-
0 4 0 0 - o uSeptic Inspection Report
Customer
Address �2 zn
City, State, Zip
6P '7
Phone 2
Contact
Tank Size: ZAW = Not Available
Job Site Address,X,' /,-"
City, State, Zip
t
Phone
Contact.
Count
P.O. Box 1800
Glenwood Springs, CO 81602
Office: 0324 Coryell Ridge Rd.
Glenwood Springs, Co 81601
970.945.5519
970.925.1833
970.945.5547 Fax
Lids Exposed: �es No How many
Tank Construction: L A oncrete Poly = Fiberglass 0 Steel Other
Baffles Intact: 0 Yes O;Nlo
Solid Levels: 0 High Med UeLow
Able to determine C 3 3'Y/e s
Approximate location,
of field:
Does probing reveal 0 Yes
Any seepage:
Overall condition of [�-�od
Tank and leachfield:
E::] No
= Fair = Poor = Non functioning
Signature Date
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ISDS Permit # L4 '7 A- a Inspector Date -7-
ISDS Final Inspection
Completeness Form
Tank is I-,�al. Tank Material + ,w, -7y 0 oa,%�A r M z e c G s 4 Q oA--�c r e
Tank is located _7 ft. and degrees from G e G N Uy ^� V c) j S
Tank is located ft. and degrees from
V/ Tank set level. ✓ Tank lids within 8" of finished grade.
Size of field ft2L4 0 units lineal ft. Technology 4,) P
�Cleanout is installed in between tank and house(+ 1/100ft).
"T" that goes down 14 inches in the inlet and outlet of the tank. Effluent filter on outlet- Yes or No
—"let and outlet is sealed with tar tape, rubber. gasket etc.
V/ Tank has two compartments with the larger compartment closest to the house.
Measure distance and relative direction to field, 2
Depth of field ft.
/U A Soil interface raked.
Inspection portals at the end of each trench.
Proper distance to setbacks.
Chambers properly installed as per manufacturers specifications. (Chambers latched, end plates prop
installed, rocks removed from trenches, etc.)
Splash plate(s) installed at least in first trench inlet.
Type of pipe used for building sewer line 5 oft leach field Q - Lt a '
Other .
Inspection meets requirements.
Copy form to installer's file if recommendations for improvement were suggested.
ACTION TAKEN:
Setbacks
Well
Potable
House
Property
Lake
Dry
Tank Drain Field
Water Lines
line
Stream
Gulch
100
25
20
10
50
25
10
�y
�/ i 50
10
5
10
50
10
* 10
Q. , '�IIH�,III
00 -.- - -
NE
J110,gallon,'
PI
r r, ?I;
07--06-05 final
isds 2147A-01 T. Even
2500 Ceder Drive Basalt CO
r
I
{ filtrators
07=06-05 final
a
isds 2147A-01 T. Even
2500 Ceder Drive Basalt CO
At
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kw \
South trenO of 20 Q-4 infiltrators
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2147A-01 Tax#246704400012
JOB NAME_2500 Cedar Drive EVEN
Basalt
JOB NO. L 11-- ,�) lC�
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BILL TO
/
DATE ST7RTED
DATE COMPLETED
DATE BILLED
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