HomeMy WebLinkAboutpitkin.eh.264504302009 (2000)A- a/Pitkin Environmental Health Depar)nt
Permit for an Individual Sewage Disposal bystem
130 S. Galena St. Aspen, Colorado 81611
Phone 970-920-5070 / FAX 970-920-5074
Permit # 00019 Parcel ID # 2645-043-02-009
Type of permit New( ) Repair( x ) Addition to House( x )
Name of Owner Shane Harvey
Street Address 51 Driskell Lane
Property legal description Lot 8 Block 2 Little Elk Creek
Size of lot 1.3 acres Total square footage of the house 2000
Water source Little Elk Creek Community Water System
# of bedrooms in house 3 # of offices, lofts & similar sized rooms in house 0
Caretaker unit No
# of bedrooms in caretaker unit
Designed for what # rooms (list)
Designed by
Mailing Address
Perc rate 15
Septic tank capacity
Total square footage of the caretaker unit
# of offices, lofts & similar sized rooms in caretaker unit
4
Permit information
Church and Associates
4501 Wadsworth Boulvd., Wheat Ridge, CO 80033
Profile hole depth 6.5 ft Depth to groundwater or bedrock
2200gallons Absorption area 1085 sq ft
Comments
3.5 ft
Septic permit approved per compliance with the engineer design and specifications dated April 26, 2000. Any changes
must be approved by this department and the design engineer prior to them being made.
Minimum horizontal distances between components of the system and physical features shall conform to the Pitkin County
ISDS regulations. A minirnum setback of 10 feet must be maintained from the existing ETA bed to the new mound field.
The engineer has made comments in the design criteria that the required setback of 82 feet from the absorption field to the
irrigation ditches can be reduced to 50 feet with no chance of contaminating the water in the ditches.
The system design will consist of adding a 1000 gallon two-compartment tank with a pump in a Biotube vault following the
existing 1200 gallon tank. A diverter valve is to be installed for access to the existing field. The new field will consist of 1
foot of imported sand filter material. The bed will be 7 rows of 10 chambers. This department does not endorse any brand
of oducts.
A foot profile hole must be dug as a condition of approval BEFORE installation of the system. The engineer must do a
final inspection of the installation and submit an as -built letter to this department. This department must also be called for
an inspection with a minimum of 48 hours advanced notice.
Permit approved by: rar(n PIOC�. Date: 0112160,
Plans and specifications of the proposed individual sewage disposal system have been reviewed and are considered
satisfactory. Permission is hereby granted to the owner or the agent to perform the work indicated in accordance with the Pitkin
County ISDS Regulation in effect at the time of issue. This permit becomes invalid 6 months from the date that the permit was
issued unless system construction has commenced or an extension has been approved in writing by the Department.
As -built drawings must be included with this permit before the final approval will be issued.
Installer:
,c
Final inspection approval:
Date:
ASPEN%O,TKIN ENVIRONMENTAL HEALTH D ARTMENT
APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM
130 S. Galena St., Aspen Colorado 81611
Phone 970-920-5070/Fax 970-920-5074
Name of OWNER 5kAl" '({a' ky. y
Owner's Mailing Address -S-( p()-1 S (c6 l✓ L -?'\N6
Business Phone: "( XO — 10 11 Home Phone: 0 C)l
Primary Contact Person (all communication regarding this permit will go through this person)
Name c
Company (,LC'' PE-U,-Ika(N(T H AC � Ascc--3
Contact Mailing Address CA ,bsp ` b Le fdt 4,,-- 5-
Business Phone : 6 Cell Phone: 61g —,L19 - -SS03 Fax: 025-c6-�2-j
Parcel ID # (available from assessor's office
at 920-5160 or at www.;aspen.com/assessor/)
Street address of property 51 � "S
Legal Description: Lot ,Block Filing
Size of lot: 1.3 acres. Type of proposed structure:
,Subdivision
Size of bldg. envelope:
Total square feet of house ?0bQ # of bedrooms in house
# of offices, lofts & similar sized rooms in house
Caretaker Unit: Attached ( ) Detached ( ) Total area(sq. ft.) of caretaker unit
# of bedrooms in caretaker unit
EC
# of offices, lofts and similar size rooms of caretaker unit
Permit is for: New Home ( ) Repair due to failure ( K ) Remodel/Addition ( ) Emergency use ( )
Water: Private well ( ) Spring ( ) Stream ( ) Community/Public Water System K)
If community system: Name of system
The fee for a ISDS application is $330 for a permit that takes 6 hours or less for the department to approve. If approval takes
longer than 6 hours, a rate of $55 per hour will be charged. The maximum fee is $1000. The basic fee of $330 is due at the time
of application. The remainder, if any, will be due in two stages: first, at the time of issuance of the ISDS permit; second, before
final approval of the ISDS permit.
Application for an individual sewage disposal system is hereby submitted. I hereby certify that the above information is true and
accurate and that I have provided true and accurate information on locations of all existing and proposed wells, contour
intervals, buildings, property lines, ditches, slopes, waterlines, springs, suction or irrigation lines, drinking water cisterns, drain
tiles, irrigation ditches, lakes, water courses, streams, floodplains, dry gulches, and existing septic systems. I hereby certify
that any such features not shown on attached site map are not present. Issuance of the permit does not imply the approval of
any other permit required for construction pursuant to Pitkin County codes. No construction may be undertaken until all
approvals and permits have been obtained.
The Aspen/Pitkin Environmental Health Department, Pitkin County and employees of these agencies will be held harmless
should the individual sewage disposal system fail or malfunction. The permit to construct is issued on information submitted by
the applicant or his/her representatives. The owner assumes full responsibility in case of failure of the system.
Signature of applicant
Date 5-
6 0
Received by I \Tl Receipt # C -?/a 3 Date S nil
G:\eh\isds\isdsapp.doc
Aspen / Pitkin Environmental Health Departmeiit
Contact Log Sheet
Name:
Parcel ID#: v2 2- ' -D - no7 Address: / 5 5 % - 3
Date Person SpokeCo Comments / Action to be Taken Initials Time
1 d 11 1 V `
C�*
county.Env.Health, 09:05 AM 06/04/2001 , 51 Driskell Lane
To: county. Env. Health
From: Tom Dunlop <tomd@ci.aspen.co.us>
Subject: 51 Driskell Lane
Cc:
Bcc:
Attached:
Nancy, Carla, Maddy,
I was called by Charlie Brooks who used to own the house at 0051 Driskell Lane in Little Elk
Creek Subdivision. I returned his call today. Charlie sold the house to Shane Harvey in 1998.
Shane is evidently threatening a law suit against Charlie because the ISDS failed. Our dept
issued a permit for a new ISDS system in 2000, designed by Ed Church. Charlie wanted to
know if our dept ever declared the ISDS failed between 1990 and 1998, the time Charlie owned
the house.
In reviewing the file (parcel ID 2645-043-02-009) 1 can find no written statement by our dept that
the system that was in place when Charlie bought it had failed. I did, however, find a statement
in a letter from Michael Gamba to Bob Nelson that our office (probably Bob) stated the system
had partially failed and a mound type system should be installed to augment the ET bed. Bob
may have made a verbal statement to the effect the system had partially failed, but I have no
personal knowledge of that claim.
I suggested that Charlie call Bob and ask him if he remembers making such a statement.
Charlie said Shane has called Bob. According to Charlie, one time Bob remembered the case,
the next time Bob did not remember the case.
Charlie is going to request Perry Harvey (no relation to Shane) visit our office to copy our files.
Perry evidently was involved in sale of the house.
This is FYI, Thank you, TSD
Printed for Tom Dunlop <tomd@ci.aspen.co.us>
E9
1—.
AC'-gr)r_iatrn_q
ENGINEERS & GEOLOGISTS
WY 12, 2000
Shane Harvey
51 Driskell Lane
Snowmass, CO 81654
Subject: Installation Observation, Proposed Harvey Remodel
51 Driskell Lane
Lot 8, Block 2, Little Elk Creek Subdivision
Pitkin County, Colorado
Job No. 12298
Mr. Harvey,
As requested, we observed the installation of the replacement onsite wastewater system (OWS) for the
subject site on June 13, 2000 and June 27, 2000. The system was designed under our Job No. 12298,
dated April 26, 2000.
The original OWS consisted of a septic tank and lined ETA bed, which were abandoned. The replacement
system includes installation of a 1000 -gallon, two-compartment, precast concrete septic tank with an
effluent filter at the outlet followed by a 1250 -gallon two-compartment precast concrete septic tank with
a pump. One mounded, pressure distributed drain field with infiltrators and 4 feet of imported sand filter
material was installed. The total infiltrative area of the mound is 1085 SF. Seven rows of 10 chambers
were placed on the mound. A concrete pad was placed on the septic tanks to prevent floating of the tanks.
An as -built drawing is included as Figure 1.
The pump and effluent filter were in place at the time of our second site visit. The OWS installer, Sam
Gerrod, with Valley Plumbing, may activate pumping system at his discretion. The components of the
OWS were installed in conformance with our plans and specifications.
If there are any questions, or if we may be of further service, please call.
CHURCH and Associates,
Dlot�
n;V
Edward O. Church, P.E. 13172
kv ? - It -
EOC/trp c�KaNm��
2 copies sent
copy to APEHD, Attn: Nancy MacKenzie
fax copy to Valley Plumbing, Attn: Sam Gerrod, 970-928-8427
DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 CASTLE ROCK 303.660.4358
303.463.9317 Fax: 303.463.9321 EVERGREEN 303.816.1455
1.5 ACRES
51 DRISKELL LANE
LOT 8, BLOCK 2, LITTLE ELK CREEK SUBDIVISION
SNOWMASS, COLORADO
PON
1085 SF OF PRESSURE
DISTRIBUTED
MOUND DRAIN FIELD WITH
IMPORTED
SAND FILTER MATERIAL.
BED HAS 7 ROWS OF 10
CHAMBERS
I
ONE 1000 -GALLON
TWO-COMPARTMENT
PRECAST CONCRETE SEPTIC. -----
TANK WITH
A PUMP
ONE 1250 -GALLON
TWO-COMPARTMENT
PRECAST CONCRETE SEPTIC
TANK WITH
AN EFFLUENT FILTER ON THE
OUTLET
RESIDENCE TO BE
REMODELED TO A FOUR -BE
RESIDENCE
TOPOGRAPHIC LINES PROVIDED BY
TOPOQUADS, INC.
� � •100
\1
PROFILE
P-3 PIT P -I
. ' 50' MINS o
• .EXTENT OF 50MIN 102•
SAND '
FILTER
MATERI L T%ti
AND FI L • �i>♦
,� 9s S� (r
� l�ij SFO Qc
ti
4,9q uo /ON "o"
�
tND
O EXISTING ,
1200 -GALLON
CLEANOUT - SEPTIC TANK
ABANDON
DRIVE
\0000� 00
OWS AS -BUILT DRAWING
SCALE
1 " = 40'
NOTES:
NO WELLS WITHIN 132' OF
DRAIN FIELD
A 50 FOOT SETBACK IS MAINTAINED
BETWEEN PROPOSED DRAIN FIELD AND
THE IRRIGATION DITCHES AND
THE PONDS.
A 10 FOOT SETBACK IS
MAINTAINED BETWEEN
PROPOSED AND EXISTING
DRAIN FIELDS
THE LOCATION OF EXISTING AND PROPOSED IMPROVEMENTS
SHOWN HEREIN; AND THE WELL AND/OR DRAIN FIELD LOCATIONS
STAKED AT THE SITE; ARE NOT THE RESULT OF A PROPERTY
SURVEY. IMPROVEMENT LOCATIONS ARE APPROXIMATE. IT IS
THE PROPERTY OWNER'S RESPONSIBILITY TO DEFINE PROPERTY
BOUNDARIES AND ENSURE ALL ONSITE IMPROVEMENTS ARE
LOCATED W.'THIN THE PLATTED SITE AND OUT OF INAPPROPRIATE
EASEMENTS. ALL SEPARATION DISTANCES ARE TO BE VERIFIED
PRIOR TO EXCAVATION.
JOB NO. 12298 FIGURE 1
t
A
1.5 ACRES
51 DRISKELL LANE
LOT 8, BLOCK 2, LITTLE ELK CREEK SUBDIVISION
SNOWMASS, COLORADO
PON
1085 SF OF PRESSURE
DISTRIBUTED
MOUND DRAIN FIELD WITH
IMPORTED
SAND FILTER MATERIAL.
BED HAS 7 ROWS OF 10
CHAMBERS
I
ONE 1000 -GALLON
TWO-COMPARTMENT
PRECAST CONCRETE SEPTIC. -----
TANK WITH
A PUMP
ONE 1250 -GALLON
TWO-COMPARTMENT
PRECAST CONCRETE SEPTIC
TANK WITH
AN EFFLUENT FILTER ON THE
OUTLET
RESIDENCE TO BE
REMODELED TO A FOUR -BE
RESIDENCE
TOPOGRAPHIC LINES PROVIDED BY
TOPOQUADS, INC.
� � •100
\1
PROFILE
P-3 PIT P -I
. ' 50' MINS o
• .EXTENT OF 50MIN 102•
SAND '
FILTER
MATERI L T%ti
AND FI L • �i>♦
,� 9s S� (r
� l�ij SFO Qc
ti
4,9q uo /ON "o"
�
tND
O EXISTING ,
1200 -GALLON
CLEANOUT - SEPTIC TANK
ABANDON
DRIVE
\0000� 00
OWS AS -BUILT DRAWING
SCALE
1 " = 40'
NOTES:
NO WELLS WITHIN 132' OF
DRAIN FIELD
A 50 FOOT SETBACK IS MAINTAINED
BETWEEN PROPOSED DRAIN FIELD AND
THE IRRIGATION DITCHES AND
THE PONDS.
A 10 FOOT SETBACK IS
MAINTAINED BETWEEN
PROPOSED AND EXISTING
DRAIN FIELDS
THE LOCATION OF EXISTING AND PROPOSED IMPROVEMENTS
SHOWN HEREIN; AND THE WELL AND/OR DRAIN FIELD LOCATIONS
STAKED AT THE SITE; ARE NOT THE RESULT OF A PROPERTY
SURVEY. IMPROVEMENT LOCATIONS ARE APPROXIMATE. IT IS
THE PROPERTY OWNER'S RESPONSIBILITY TO DEFINE PROPERTY
BOUNDARIES AND ENSURE ALL ONSITE IMPROVEMENTS ARE
LOCATED W.'THIN THE PLATTED SITE AND OUT OF INAPPROPRIATE
EASEMENTS. ALL SEPARATION DISTANCES ARE TO BE VERIFIED
PRIOR TO EXCAVATION.
JOB NO. 12298 FIGURE 1
�1
{
41 '*,\,., CH U RCH & Associates, Inc.
ENGINEERS & GEOLOGISTS
April 26, 2000
Shane Harvey
51 Driskell Lane
Snowmass, Colorado 81654
Subject: Subsurface investigation and OWS Repair and Upgrade Design, Proposed Harvey Remodel
51 Driskell Lane
Lot 8, Block 2, Little Elk Creek Subdivision
Pitkin County, Colorado
Job No. 12298
Dear Mr. Harvey,
As requested, we; have evaluated subsurface conditions at the site and designed an upgrade onsite
wastewater system (OWS) for the proposed residence remodel. Our firm investigated subsurface condi-
tions on April 19, 2000.
SITE CONDITIONS
The property is located in a rural residential area in Pitkin County, where OWS are required. The proposed
drain field area is relatively flat, and has a cover of native grass with a few scattered trees. The existing
OWS was designed for a two-bedroom residence and was installed in 1976. The homeowner has requested
a complete OWS repair design due to seasonal surfacing of effluent from the existing drain field. The
existing system consists of a 1200 -gallon septic tank and 2695 square feet (SF) of ETA drain field. The
residence is served water by the community well, located 250+ feet from proposed OWS.
PROPOSED CONSTRUCTION
The existing residence will be remodeled to have a total of four bedrooms and within a living area of 2000-
6000 SF. We have sized the OWS based on 4 bedrooms and 800 Gallons Per Day (GPD) using Aspen/
Pitkin Environmental Health Department (APEHD) loading of 100 gallons per day per person. The sewage
loading with a peaking factor of 1.75 is 1400 GPD. This loading includes washing machines and a garbage
grinder.
SUBSURFACE CONDITIONS
A subsurface investigation was performed by digging one profile pit 6.5 feet deep and 3 percolation holes,
31 to 44 inches deep, at the locations indicated on Figure 1. Subsurface conditions encountered in the
profile pit consisted of 1 foot of topsoil, underlain by sandy, silty, clay to 3.5 feet, underlain by sand with
gravel and cobble to the maximum depth explored of 6.5 feet. Ground water was encountered at 3.5 feet.
Percolation tests indicate percolation rates of 6 to 27 minutes per inch (MPI). The average percolation rate
is 15 MPI. Percolation data is presented in Table 1.
DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 CASTLE ROCK 303.660.4358
303.463.9317 Fax: 303.463.9321 EVERGREEN 303.816.1455
! OWS Repair and Upgrade Design
�I Job No. 12298
Page 2
RECOMMENDATIONS
The installation of a septic tank, a pump, and one mound chamber -type drain field with imported sand filter
material is proposed at the locations presented on Figure 1. The OWS design is based on an average sewage
load of 800 GPD and a percolation rate of 15 MPI. We recommend the installation of one 1000 -gallon two-
compartment, pre -cast concrete septic tank with a pump in a Biotube vault to follow the existing 1200-
gallon tank. A diverter valve should be installed to access the existing drain field in the future. One pressure
distributed, mounded drain field bed using chambers with 1 feet of imported sand filter material should be
installed, as indicated on Figure 1. With the percolation rate of the underlying soil being more rapid than the
sand filter material, which results in the calculated basal area being less than the application area, we are
proposing a 1:1 horizontal to vertical (H:V) slope of the sand filter material from the application surface.
The bed must have 7 rows of 10 chambers with 1.25 -inch PVC laterals suspended from the chambers, as
indicated on Figure 2. The laterals should have 1/8 holes drilled on 4 -foot centers facing upward, with
every fifth hole facing downward. The pump should be capable of a total flow rate of 43.5 gallons per
minute, and a total dynamic head of 22.4 feet.
If the owner would like to change the layout of the drain field to accommodate water bodies, landscaping or
other issues, our firm must be contacted to confirm the changes.
�U Based on subsurface conditions, topographic positioning of the drain field and irrigation ditches, we believe
the setback distance to the irrigation ditches can be reduced from 82 feet to 50 feet. The resultant flow from
the drain field will be away from the water in the irrigation ditches, and contamination of the ditches by the
OWS will be prevented.
An eight -foot test pit will be required by the county and by our firm prior to OWS installation to
i confirm ground water conditions.
'� in field bed area during construction should be kept at a minimum to
�a � Vehicle movement over the drain g
C� prevent compaction of the receiving soils. The bottom of the bed should be scarified with a pick,
shovel, or backhoe bucket teeth prior to the addition of dispersal gravel.
The surface of the field should be seeded after installation of the fields. We recommend using a native seed
mix available at seed stores. These mixes do not require irrigation and develop a growth 10 to 15 inches
high. No automatic sprinkler system should be installed over the fields.
OPERATION AND MAINTENANCE
The owner must realize an OWS is different from public sewer service. The owner must be aware of,
and assume responsibility for maintenance of the system. In the absence of a monitoring program, we
recommend the septic tank be pumped every two years. Effluent filter and screened vaults, as
applicable, are to be cleaned during pumping. There are daily considerations such as not putting plastic
or other nonbiodegradable materials into the septic system. Garbage disposal use should be minimized.
The backwash of a water softener may be harmful to the OWS. A separate drywell should be constructed
for the backwash waste, if a softener is installed. Chemically treated water from a swimming pool or spas
should not be introduced to the OWS.
W
OWS Repair and Upgrade Design
Job No. 12298
Page 3
LIMITATIONS
An OWS design should be installed by a contractor who is experienced in its installation. Our investigation,
layout, design and recommendations are based on data submitted. If subsurface conditions considerably
different from those described in this report are encountered, we should be notified to evaluate the effect on
the proposed OWS. If the health department makes modifications to this design, we should be contacted to
evaluate the impact on the performance of the OWS. The county and our firm must be contacted upon
completion of the OWS
All construction is to be in accordance with the ISDS regulations. Pipe type and size, burial requirements,
septic tank construction, and other specifications, which are not depicted in our report, are to conform to
the requirements of the ISDS regulations. The installer of the system is to have demonstrated knowledge of
the APEHD ISDS regulations and requirements.
Sincerely,
CHURCH & Associates
Edward O. Church, P. t, 13 Z
Z
O•1�,4L E� 1
EOC/trp
3 copies sent
fax Figures 1 and 2 QWY: ATTN: Sam Gerrod, 970-928-8427
ASPEN/PITKIN ENVIRONMENTAL HEALTH DEPAIIENT
ISDS DESIGN CALCULATIONS
Owner's Name HARVEY ' Parcel ID #
House Size (sq. ft.) 2000-6000 (75 gpd, 100 gpd, or 130 gpd) 100
Number of Bedrooms in Main House `I_
Number of Offices, Libraries, Studies, Similar -sized Rooms in Main House 0
Number of Bedrooms in Detached Caretaker unit 0
Number of Offices, Studies, Similar -sized Rooms in Caretaker Unit 0
(If the caretaker unit is ATTACHED, treat as if part of main house.)
Average Daily Waste Flow 800
State Review Required? no
Perc Rate 1.5 (T) - Design based on 0.95 gals/ft/day application rate.
Design Flow (Q) = # potential bedrooms X 2 people/bedroom X gpd X 1.75
Q= 1400
Absorption Area (A= Q/5 X SART)
A = ft. of absorption area required Ro du_�
i filtrator units without reduction
A maximum 30% duction i allowed for use of deep gravel or gravelless chambered system,
only if the tot size and soil conditions are optimal.
If a reduction is being proposed, describe: why lot size and soil conditions are optinud:
SAND FILTER MATERIAL AND PRESSURE DOSING
A = 11WF7Sq.ft. with reduction
op infiltrator units with reduction
Type of system: []Absorption trenches []Absorption bed [x] Gravelless chambers
[]Dry well []Seepage Pit []Other
Minimum tank capacity 1750 gallons
SETBACK FROM WELL
# of feet = 132
SETBACK FROM POND, STREAM OR IRRIGATION DITCH
# of feet = 82 REDUCTION PERMITS 50' SETBACK
SETBACK FROM DRY GULCH
# of feet = 57
FINAL INSPECTION BY: DATE:
.5 ACRES
51 DRISKELL LANE
_OT 8, BLOCK 2, LITTLE ELK CREEK SUBDIVISION
;NOWMASS, COLORADO
1
NOTES:
�0 NO WELLS WITHIN 132' OF
���� • • PROPOSED DRAIN FIELD
A 50 FOOT SETBACK MUST
BE MAINTAINED BETWEEN
PROFILE PROPOSED DRAIN FIELD AND
P-3 PIT P-1 THE IRRIGATION DITCHES AND
' 50' MINS=3THE PONDS.
POND 50' MIN G`
• EXTENT' OF A 10 FOOT SETBACK MUST
SAND� BE MAINTAINED BETWEEN
FILTER y PROPOSED AND EXISTING
T% DRAIN FIELDS
SCALE
1"=40'
'00000
TOPOGRAPHIC LINES PROVIDED BY
TOPOOUADS, INC.
EXISTING CONDITIONS, LOCATION OF
PERCOLATION HOLES, AND LOCATION
OF PROPOSED OWS
FIGURE 1
JOB NO. 12298
MATERI L
AND F1 L
ti
1085 SF OF PRESSURE
• ti♦
DISTRIBUTED
MOUND DRAIN FIELD WITH
IMPORTED
FILTER MATERIAL. ,
2
i
SAND
10
S
69S /VG
,
BED MUST HAVE 7 ROWS OF
CHAMBERS
�617q Fp
„ r
ONE 1000 -GALLON
TWO-COMPARTMENT
DIVERTER
BALL VALVE
POND
EXISTING
PRECAST CONCRETE SEPTIC%
TANK WITH
1200 -GALLON
PUMP IN BIOTUBE VAULT
-
\ SEPTIC TANK
CLEANOUT-"--
�00
DRIVE
THE LOCATION OF EXISTING AND PROPOSED IMPROVEMENTS
SHOWN HEREIN; AND THE WELL AND/OR DRAIN FIELD LOCATIONS
STAKED AT THE SITE; ARE NOT THE RESULT OF A PROPERTY
I
SURVEY. IMPROVEMENT LOCATIONS ARE APPROXIMATE. IT IS
RESIDENCE TO BE
'
THE PROPERTY OWNER'S RESPONSIBILITY TO DEFINE PROPERTY
REMODELED TO A FOUR-BEDROOM
BOUNDARIES AND ENSURE ALL ONSITE IMPROVEMENTS ARE
LOCATED WITHIN THE PLATTED SITE AND OUT OF INAPPROPRIATE
RESIDENCE
,
EASEMENTS. ALL SEPARATION DISTANCES ARE TO BE VERIFIED
PRIOR TO EXCAVATION.
'00000
TOPOGRAPHIC LINES PROVIDED BY
TOPOOUADS, INC.
EXISTING CONDITIONS, LOCATION OF
PERCOLATION HOLES, AND LOCATION
OF PROPOSED OWS
FIGURE 1
JOB NO. 12298
t
- - - - - - - - - - - - - - - - - - - - - - - - - - - EXTENT DF- FILL- - - - - - - - - - - - - - -
rYPICAL PLAN VIEW — '`I T c , _ _ _ _ _ _ _ _ _ _ _ -
_
FILL TO BE
SLOP
AT 2:1
L
SAND TO BE
SLOPED
AT
TO PUMP
CHAMBER
INFILTRATOR
CHAMBER
3' X 6.25'
rNDS CAPPED
1.25' PVC LATERAL WITH 1/8' HOLES EVERY 4 FEET FACING UPWARD
(EVERY 5TH HOLE FACING DOWNWARD)
TYPICAL CROSS—SECTION — N.T.S.
CALCULATIONS AND SPECIFICATIONS
DESIGN CRITERIA
RESIDENCE - 4 BEDROOMS, 2000-6000 SF, 100 GALS/DAY/PERSON
AVERAGE RESIDENCE LOADING = q = 800 GPD
PERCOLATION RATE = 15 MPI
TOP OF MOUND
AREA = ((800*1.75)/•95) = 1474 SF
REDUCTION BY 30% = 1032 SF
PROPOSED AREA = 1085 SF, 70 CHAMBERS
BASAL AREA
DESIGN LOADING = ((1.75)*800) = 1400 GPD
AREA = (1400 * SORT 15)/5 = 1084
DUE TO PERCOLATION RATE OF UNDERLYING SOIL AND THE
CALCULATED BASAL AREA BEING LESS THAN APPLICATION
AREA WE ARE PROPOSING A 1:1 SLOPE OF SAND FILTER
MATERIAL FROM APPLICATION SURFACE
BED SPECIFICATIONS
NUMBER OF BEDS - 1
LENGTH OF CHAMBERS - 62.5 FEET, 10 CHAMBERS
WIDTH OF CHAMBERS - 21 FEET, 7 CHAMBERS
TOTAL NUMBER OF CHAMBERS - 70 CHAMBERS
TREATMENT UNIT SPECIFICATIONS
TOTAL CAPACITY - 1.75 X 0 X (30 HOURS/24 HOURS) = 1750 GALLONS
RECOMMENDATION - ONE 1000 GALLON TWO-COMPARTMENT PRECAST CONCRETE
SEPTIC TANK WITH PUMP IN SECOND COMPARTMENT TO FOLLOW EXISTING 1200
GALLON TANK
JO
GROUND
SURFACE
VELLESS CHAMBER
3' BY 6.25'
3SERVAIION PIPE
PRESSURE DISTRIBUTED BED
1.25" SCHEDULE 40 PVC PIPE WITH 1/8" HOLES
ON 4' CENTERS FACING UPWARD.
(EVERY 5TH HOLE FACING DOWNWARD)
ONSITE BACKFILL
1' MIN
DRAIN FIELD DETAILS
6 INCHES OF TOPSOIL TO BE REMOVED AND
REPLACED ON TOP OF MOUND.
2
1
GROUND
SURFACE
GURE 2
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TABLE 1 - PERCOLATION TEST RETS
)RISKELL LANE
KIN COUNTY, COLORADO
DATE
6GL ucs.�v
)-1' TOPSOIL
- 3.5' CLAY, SANDY, SILTY,MEDIUM STIFF, MOIST, BROWN/LIGHT BROV1
- 6.5' SAND WITH GRAVEL AND COBBLES, DENSE, MOIST TO WE]
RED/BROWN/TAN
GROUND WATER AT 3.5'
--PTH TIME DEPTH
HOLE, INTERVAL START,
:HES) (MINUTES) (INCHES)
AVG.
DEPTH CHANGE, INTERVAL HOLE
END, (INCHES) PERC PERC.
(INCHES) RATE (MPI) RATE,
/MPI►
44
31
3.00
4.50 1.50
7
6
10
to
4.50
5.00 0.50
20
5.00 1.25
8
2.50
5.00
5.50 0.50
20
5.00
6.25 1.25
10
2.50
3.25 0.75
13
10
3.00
10
3.25
3.75 0.50
20
10
10
3.75
4.12 0.37
27
27
w
2
31
10
2.00
3.75 1.75
6
10
6.00
8.00
10
3.75
5.00 1.25
8
2.50
5.50
3.00
10
5.00
6.25 1.25
8
7.25
1.75
6
10
3.00
4.50 1.50
7
1.75
6
10
4.50
5.50 1.00
10
5
5
10
5.50
6.50 1.00
10
10
3 33 10
3.00
6.00
3.00
3
10
6.00
8.00
2.00
5
10
2.50
5.50
3.00
3
10
5.50
7.25
1.75
6
7.25
9.00
1.75
6
--1-7EEE10
10
3.50
5.50
2.00
5
5
NUMBER OF HOLES: 3
AVG PERCOLATION RATE (MPI): 15
Job No. 12298
?'^
Engineer's Submittal for Septic Permit in Pitkin County
Owner's Last Name: HARVEY Location: 51 DRISKELL LANE
Summary of information regarding new septic system:
Type of system being proposed: SEPTIC TANK AND MOUND GRAVELLESS CHAMBERS
Other treatment processes being used: NONE
Does the system use any mechanical parts? (Prohibited unless there is no alternative)YES
If yes, explain why there are no alternatives A PUMP IS REQUIRED DUE TO MOUND DRAIN
FIELD AND PRESSURE DISTRIBUTED SYSTEM
Does the system require any maintenance other than routine pumping? YES
If yes, who will do the maintenance? CLEAN FILTER WHEN SEPTIC TANK IS PUMPED
Are any reductions being proposed? YES
If yes, what makes the lot and soil conditions optimal?
GOOD PERCOLATION RATE AND PRESSURE DOSING MOUND SAND BED
Which of the following are on the site or within setbacks?
Closest distance of septic system to each feature
[] 100 year floodplain N/A
[] well(s) >132 FEET
[] irrigation ditches >82 FEET, 50 FEET WITH REDUCTION
[] streams >82 FEET
(] ponds >82 FEET, 50 FEET WITH REDUCTION
[] other features N/A
What was the profile hole depth? 6.5 FEET
What is the depth to groundwater? 3.5 FEET
What is the depth to bedrock? NLA
What assumptions, if any, were made in system sizing and design? (Include any local, site-
specific data, such as months without snow cover, ratio of evaporation to absorption, etc. that are
relevant.) AN 8 FOOT TEST PIT SHOULD BE EXCAVATED PRIOR TO INSTALLATION TO
CONFIRM GROUND WATER CONDITIONS
If there are any variations from normal design, please explain how they can be demonstrated to
improve treatment and protect water quality. NONE
JEROME GAMBA & ASSOCIATES, INC.
CONSULTING ENGINEERS & LAND SURVEYORS
201 CENTENNIAL, SUITE 306D
P.O. BOX 1458
GLENWOOD SPRINGS, COLORADO 81602-1458
PHONE (303) 945-2550 FAX: (303) 945-1410
Bob Nelson
Pitkin County Health Dept.
130 South Galena Street
Aspen, Colorado 81611
Dear Bob:
At the request of Jerry Martin, 0051 Driskell Lane, in the Little
Elk Creek Village Subdivision, we have prepared the enclosed septic
system improvement design to augment his existing system. The
current system is a septic tank with effluent disposal through an
evapotranspiration field. According to your department, the
evapotranspiration field has partially failed and a mound type
leach field is necessary to augment the effluent disposal. As we
discussed with your office on the phone, the sizing of the leach
field is to be such that in the event of total failure by the ET
field, the leach field will be able to accommodate the entire flow.
The calculations for the sizing of the leach field are shown on the
enclosed sheet 1 of 2.
The new system will use a pump chamber to alternate the flow
between the ET field and the mound. This pump chamber is sized so
that in the event of pump failure, the chamber will be able to
accommodate a full day's sewage flow. In order to alternate the
flow between the ET field and the mound a Toro Vision 2
programmable pump controller with a pump starter relay can be used
to program the delivery of water to either disposal field. We
recommend the pump starter, relay be wired with a manual bypass
switch in the event that only the mound disposal field is to be
used. When the system is alternating between both fields, the high
water alarm switch in the pump chamber, should be raised or
deactivated.
If there are any questions regarding this design or the operation
of this system, please call.
Sincerely,
J
s, Inc.
Michael Gamba, Design Engineer
MJG/pf
cc: Jerry Martin
_
� u)
q.2-0 Ell- - r
3' MIN.
SCALE: I INCH 2 FEET
TANK ALERT MODEL 101HW ALARM
SYSTEM OR EQUAL MOUNTED ON POLE
NOTE'
THE INVERT AT THE 22-1/2' BEND IS TO BE EXACTLY 1"
ABOVE THE INVERT OF THE EXISTING 4" PVC DISTRIBUTION
LINE IN THE EVAPOTRANSPIRATION FIELD. THIS WILL ALLOW
1" OF STANDING WATER IN THE ET -FIELD DISTRIBUTION
PIPE SYSTEM BEFORE OVERFLOWING INTO THE PUMP CHAMBER.
2' 22-1/2' PVC BENDS
Z1"
4" PVC SEWER PIPE
2 MONITORING WELLS
4" DIA. PVC PIPE CAPPED
4" X 4" PVC TEE /
60" I.D. HEAVY WALL �
PUMPING CHAMBER
- \�li _'.
HIGH WATER ALARM SWITCH
7 LEVEL CONTROL SWITCHES
/ HYDROMA11C SW25-At PUMP OR EQUAL
CROSS SECTION OF PUMP CHAMBER
SCALE: 1 INCH = 2 FEET
/ 1-1/2" PVC DISTRIBUTION PIPE \ INFILTRATOR LEACHING CHAMBERS OR EQUAL
LEACHING BED COMPOSED OF 3 UNITS LONG
CLAY FILL OR TOPSOIL y-1 FINISHED GROUND SURFACE BYl���TS WIDE.
\MUM SLOPE 6" MIN, TOPSOIL COVER -- ----- 1' MIN. -��`\ M SL OPE,
M\N ----1' IN,------- -- --- - ------ - ------ ---------------- - --
--------- _
--- \
SURF PCE
GROUNO M\p1. AQP �'� APPROX ELEV.
0 1' ABOVE EXISTING GROUND rOpSOq COIF �NlSye0
`_�� Rte— GROU
MA'"ONRY SAND FILL—� �= ND SUR
_
�V' EXISTING GROUND SURFACE -� OR APPROVED EQUAL
-- — _ _ _ _ _ o _ _ _ e — — _ _ _ — s — _ _. _�qcf
a.
EXCAVATE A MINIMUM OF 1.5 FEET �X/
OR TO THE BOTTOM OF THE TOPSOIL N \
vy
Li
v /i /i /i
IL
N
CLAY FILL OR TOPSOIL
M\a\MUM-'�� �
3_
1-1/2" PVC TEE
V CO�Ri'
FRONT VIEW CROSS SECTION OF MOUND TYPE LEACH FIELD
SCALE: 1 INCH = 2 FEET
6 - 1-1/2" PVC FEEDER PIPES HUNG INSIDE LEACH CHAMBERS.
DRILL 3/8- HOLE ® 12 O'CLOCK EVERY 2 FEET
ALONG PIPE INSIDE CHAMBERS. DRILL ONE 3/8" HOLE O
INFILTRATOR LEACHING CHAMBERS OR EQUAL
6 O'CLOCK AT THE END OF EACH LEACH CHAMBER TO ALLOW
LEACHING BED COMPOSED OF 3 UNITS LONG CLAY FILL OR TOPSOIL
PIPES TO DRAIN AFTER PUMPING. 2 MONITORING WELLS
BY 6 UNITS WIDE.
FINISHED GROUND SURFACE
4" DIA. PVC PIPE CAPPED
__L
6" MIN. TOPSOIL COVER ---r1 Ml�l MUM SLOpf
----....--------------------------------�-- - - - - - - - - - - - - - - - - - - - - - - - - ------------------------- 3:)
F P(£ SOpSOt APPROX. ELEV.
co
OROUNO 1' ABOVE EXISTING GROUND
EXISTINv" GROUND SURFACE
6' MIN 3
��+�`p!t COIR 1
`\ F?NlSNFD
OU
6" MASONRY SAND FILL ``\��� u� J I I N� S�RFgC
OR APPROVED EQUAL �� E
EXCAVATE A MINIMUM OF 1.5 FEET
. - OR TO THE BOTTOM OF THE TOPSOIL
1-1/2" PVC PRESSURE PIPE
MINIMUM SLOPE = 1%
/ 2' 4" DIA. PERFORATED PVC PIPE
— — — — — — — — — — — — — — _ — _ �— SCARIFY EXCAVATED SURFACE (KEEP HEAVY EQUIPMENT OUT OF EXCAVATED AREA) --�— —
SIDE VIEW CROSS SECTION OF N'OUND TYPE LEACH FIELD
SCALE: 1 INCH = 2 FEET
4.1'
7.00'
-- _
--------- AIARM Q
5,
5�__
--0 8.
LEVEL
START LEVEL
_____- _ Q
_-_-_SHUT-OFF LEVEL Q
1'
FEE
HIGH WATER ALARM SWITCH
7 LEVEL CONTROL SWITCHES
/ HYDROMA11C SW25-At PUMP OR EQUAL
CROSS SECTION OF PUMP CHAMBER
SCALE: 1 INCH = 2 FEET
/ 1-1/2" PVC DISTRIBUTION PIPE \ INFILTRATOR LEACHING CHAMBERS OR EQUAL
LEACHING BED COMPOSED OF 3 UNITS LONG
CLAY FILL OR TOPSOIL y-1 FINISHED GROUND SURFACE BYl���TS WIDE.
\MUM SLOPE 6" MIN, TOPSOIL COVER -- ----- 1' MIN. -��`\ M SL OPE,
M\N ----1' IN,------- -- --- - ------ - ------ ---------------- - --
--------- _
--- \
SURF PCE
GROUNO M\p1. AQP �'� APPROX ELEV.
0 1' ABOVE EXISTING GROUND rOpSOq COIF �NlSye0
`_�� Rte— GROU
MA'"ONRY SAND FILL—� �= ND SUR
_
�V' EXISTING GROUND SURFACE -� OR APPROVED EQUAL
-- — _ _ _ _ _ o _ _ _ e — — _ _ _ — s — _ _. _�qcf
a.
EXCAVATE A MINIMUM OF 1.5 FEET �X/
OR TO THE BOTTOM OF THE TOPSOIL N \
vy
Li
v /i /i /i
IL
N
CLAY FILL OR TOPSOIL
M\a\MUM-'�� �
3_
1-1/2" PVC TEE
V CO�Ri'
FRONT VIEW CROSS SECTION OF MOUND TYPE LEACH FIELD
SCALE: 1 INCH = 2 FEET
6 - 1-1/2" PVC FEEDER PIPES HUNG INSIDE LEACH CHAMBERS.
DRILL 3/8- HOLE ® 12 O'CLOCK EVERY 2 FEET
ALONG PIPE INSIDE CHAMBERS. DRILL ONE 3/8" HOLE O
INFILTRATOR LEACHING CHAMBERS OR EQUAL
6 O'CLOCK AT THE END OF EACH LEACH CHAMBER TO ALLOW
LEACHING BED COMPOSED OF 3 UNITS LONG CLAY FILL OR TOPSOIL
PIPES TO DRAIN AFTER PUMPING. 2 MONITORING WELLS
BY 6 UNITS WIDE.
FINISHED GROUND SURFACE
4" DIA. PVC PIPE CAPPED
__L
6" MIN. TOPSOIL COVER ---r1 Ml�l MUM SLOpf
----....--------------------------------�-- - - - - - - - - - - - - - - - - - - - - - - - - ------------------------- 3:)
F P(£ SOpSOt APPROX. ELEV.
co
OROUNO 1' ABOVE EXISTING GROUND
EXISTINv" GROUND SURFACE
6' MIN 3
��+�`p!t COIR 1
`\ F?NlSNFD
OU
6" MASONRY SAND FILL ``\��� u� J I I N� S�RFgC
OR APPROVED EQUAL �� E
EXCAVATE A MINIMUM OF 1.5 FEET
. - OR TO THE BOTTOM OF THE TOPSOIL
1-1/2" PVC PRESSURE PIPE
MINIMUM SLOPE = 1%
/ 2' 4" DIA. PERFORATED PVC PIPE
— — — — — — — — — — — — — — _ — _ �— SCARIFY EXCAVATED SURFACE (KEEP HEAVY EQUIPMENT OUT OF EXCAVATED AREA) --�— —
SIDE VIEW CROSS SECTION OF N'OUND TYPE LEACH FIELD
SCALE: 1 INCH = 2 FEET
DESIGN CALCULATIONS
HOUSE IS A THREE BEDROOM HOUSE. ASSUME 2 PEOPLE PER
BEDROOM AND AN AVERAGE DAILY SEWAGE FLOW OF 75 GALLONS
PER PERSON PER DAY ACCORDING TO THE COLORADO STATE
DEPARTMENT OF HEALTH:
THEREFORE:
(3 BEDROOMS) X (2 PEOPLE/BEDROOM) = 6 PEOPLE
PEAK FLOW = (6 PEOPLE) X ( 75 GPD/PERSON) = 450 GALLONS PER DAY
THREE PERCOLATION TESTS WERE CONDUCTED BY JEROME GAMBA & ASSOCIATES, INC.
ON NOVEMBER 23, 1990. THE PERCOLATION TEST HOLES WERE DUG IN THE BOTTOM
OF 25' DEEP BACKHOE PITS. THE RESULTS ARE AS FOLLOWS:
TEST PIT NUMBER PERCOLATION RATE (MIN./INCH)
TEST PIT #1 4.85 MINUTES/INCH
TEST PIT #2 7.31 MINUTES/INCH
TEST PIT #3 8.17 MINUTESANCH
A TEST PIT WAS DUG WITH THE BACKHOE TO A TOTAL DEPTH OF 8 FEET.
THE SOIL DESCRIPTIONS FOR THIS HOLE ARE AS FOLLOWS:
DEPTH
0 TO 2.9 FT. SOIL DESCRIPTION
ROOT ZONE, ORGANIC SANDY TOPSOIL
AT THE DEPTH OF 2.9 FT. AN OXIDATION BOUNDARY WAS OBSERVED.
THE MATERIAL BELOW THIS BOUNDARY HAD RED AND ORANGE OXIDIZED
IRON STAINS, INDICATING A PREVIOUS WATER LEVEL AT THIS POINT.
2_9 TO 7" FT. SANDY SOIL MATRIX BETWEEN GRAVEL, COBBLES AND BOULDERS.
WATER TABLE ON NOVEMBER 23, 1990 WAS OBSERVED AT 6.6 FT.
BASED ON AN ASSUMED ANNUAL HIGH WATER ELEVATION AT APPROXIMATELY 3 FEET
BELOW THE SURFACE, A MOUND TYPE LEACH FIELD IS REQUIRED FOR THIS SITE.
DUE TO E.P.A. RECOMMENDATIONS AND PITKIN COUNTY REQUIREMENTS THE BOTTOM
OF THE INFILTRATIVE SURFACE IS TO BE NO LESS THAN 4 FEET ABOVE THE ANNUAL
HIGH WATER TABLE. THEREFORE THE BOTTOM OF THE INFILTRATIVE SURFACE WILL
BE APPROXIMATELY 1 FOOT ABOVE THE EXISTING GROUND ELEVATION.
THE PITKIN COUNTY DEPARTMENT OF HEALTH RECOMMENDS THAT A MASONRY SAND IS
ADEQUATE FOR THE FILL MATERIAL USED IN THE MOUND.
CALCULATION FOR THE ABSORPTION AREA OF THE MOUND:
NATURAL SOIL TEXTURE: SANDY LOAM
NATURAL PERCOLATION RATE: 8.2 MINUTES PER INCH
DEPTH TO SEASONALLY HIGH WATER TABLE: 3 FEET
ACCEPTABLE LOADING RATE FOR MASONRY SAND: 1.2 GPD/SQ.FT.
ACCEPTABLE LOADING RATE FOR EXISTING ET -FIELD: 0.05 GPD/SQ.FT.
EFFLUENT DISPOSED IN THE ET -FIELD: (.05 GPD/SQ.FT.) X (1400 SQ.FT.) = 70 GPD
PEAK FLOW INTO MOUND: 450 GPD - 70 CPD = 380 GALLONS PER DAY
SIZE OF THE ABSORPTION AREA: 360 GPD 316.67 SQ.FT.
1.2 GPD/SQ.FT.
DIMENSIONS OF THE MOUND:
316.67 SQ.FT, 17.6 UNITS = 18 UNITS
18 SQ.FT. PER INFILTRATOR
IF THE MOUND IS 6 UNITS WIDE BY 3 UNITS LONG:
WIDTH = 18 FEET
LENGTH = 18.75 FEET
WITH 1 FOOT COVER OVER THE INFILTRATOR AND 3:1 SIDE SLOPES ON FLAT LAND:
BASAL WIDTH = 36 FEET APPROXIMATELY
BASAL LENGTH = 37 FEET APPROXIMATELY
THIS MOUND TYPE LEACH FIELD DESIGN IS TO AUGMENT AN EXISTING EVAPOTRANSPIRATION
BED WHICH HAS PARTIALLY FAILED ACCORDING TO THE PITKIN COUNTY HEALTH DEPT.
DURING OUR FIELD TESTS WE NOTED THAT THE VEGETATIVE COVER OVER THE ET FIELD
ONLY CONSISTS OF NATIVE GRASSES. A STANDARD ET FIELD IS DESIGNED TO DISSIPATE
THE MAJORITY OF THE EFFLUENT THROUGH THE VEGETATIVE COVER. SINCE THIS FIELD IS
COVERED BY VEGETATION THAT IS ONLY GROWING 3 TO 4 MONTHS PER YEAR, IT IS OUR
RECOMMENDATION THAT THE ET FIELD COULD BE IMPROVED BY PLANTING EVERGREEN SHRUBS
OVER THE FIELD IN ADDITION TO SEVERAL DECIDUOUS PHREATOPHYTES SUCH AS WILLOW.
THIS WOULD GREATLY INCREASE THE EVAPOTRANSPIRATION FROM THE FIELD THROUGHOUT
THE ENTIRE YEAR.
1 I
REV
11-30-901 SYSTEM REVISED PER SPECS. BY PITKIN COUNTY SANITARIAN
DATE
REVISION
MJG TAZ JFG
MADE CHKD APP
BY I BY BY
STING SEPTIC TANK
BE RESEEDED
-LOWING SPRING.
E RESEEDED WITH
PROPERTY LINE
PLAN OF SEWAGE
DISPOSAL S
0
SCALE: DATE: SHEET
1" = 5' NOVEMBER 27, 1990 1 OF 2
�o
DRAWN BY: CHKD BY: APPD BY: PLAN NO.
MJG TAZ JFG 90152\LAYOUT
SINGLE -STORY
3 BEDROOM
WOOD FRAME HOUSE
SEWAGE DISPOSAL SYSTEM IMPROVEMENT
LOT 8, BLOCK 2, LITTLE ELK CREEK VILLAGE SUBDIVISION
PITKIN COUNTY, COLORADO
V PREPARED FOR
I. JERRY MARTIN
P.O. BOX 261, ASPEN, COLORADO 81612
JEROME GAMBA & ASSOCIATES, INC.
CONSUNG ENGINEERS & LAND SURVEYORS
POST OFFICE BOX 1458
201 CENTENNIAL, SUITE 306D
GLENWOOD SPRINGS, COLORADO 81602 (303) 945-2550
DRIVEWAY
SHEET NO.
PROJECT:
90152