HomeMy WebLinkAboutpitkin.eh.264324401004 (2003-2004) (OWTS 5)Pitkin County Environmental Health Department
Permit for an Individual Sewage Disposal System
0405 Castle Creek Road, Suite 10, Aspen, Colorado 81611
Phone 970-920-5070 / FAX 970-920-5077
REPLACES PERMIT #03045
Permit # 04032 Parcel ID # 2643-244-01-004
vw55
Type of permit New( X) Repair( ) Addition/Remodel to House( ) Main residence -TANK ONLY
Name of Owner John Graham (& Lisa Wyly)
Street Address 4811 Woody Creek Rd Woody Creek CO 81656
Property legal description
Size of lot
Water source
Private Well
# of bedrooms in house 4
Caretaker unit
# of bedrooms in caretaker unit
Lot 4, Natal Subdivision
Total square footage of the house Less than 4156 sq ft
# of offices, lofts & similar sized rooms in house
Total square footage of the caretaker unit
1 FUTURE
# of offices, lofts & similar sized rooms in caretaker unit
Designed for what # rooms (list) (5) FIVE bedrooms = 4 bedrooms + 1 future bedroom
Permit information
Designed by Church & Associates
Mailing Address 4501 Wadsworth Blvd Wheat Ridge CO 80033
Perc rate 13 Profile hole depth 8 Depth to groundwater or bedrock + 8ft
Minimum Septic tank capacity 2,188 gallons Minimum Absorption area See eng. design
Comments
Septic permit approved per compliance with the engineer design and specifications dated July 14, 2004. This
permit is for a tank only. There is a common drip irrigation field to serve this residence and the Matthews house
and caretaker unit. Any changes must be approved by this department and the design engineer 2rior to them being
made. Minimum horizontal distances between components of the system and physical features shall conform to the
Pitkin County ISDS regulations.
This permit is for a 2,000 gallon two compartment concrete tank with an effluent filter at the outlet. (Effluent flows to
two 1,000 -gallon single compartment, concrete tanks with an AdvanTex AX20 Treatment System and then to a
common drip irrigation field (permitted under permit # 03034).
This department does not endorse any brand of products. This permit must be kept on-site during installation.
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.
*Revegetation over the area of the field is very important for the functioning of the system. Pitkin County has guidelines that must be
followed to assure the plants that are introduced are appropriate for the conditions of the area. The use of native plants is strongly
encouraged -
Permit approved by: &2LL-&(Date: 1 U
Plans and specifications of theloposed 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 drawi
Installer:
must be included with this permit before the final approval will be issued.
�, �� Date: 3 d
Final approval: � �-
Pitkin County Environmental Health Department
Permit for an Individual Sewage Disposal System
0405 Castle Creek Road, Suite 10, Phone 970-920-5070 / FAX 970-920-5077
Permit
81611
507
Permit # 03045 Parcel ID # 2643-244-01-004
Type of permit New X Repair( Addition/Remodel to House
Name of Owner Two Mile Ranch - Lisa Wyly & John Graham
Street Address 3448 Woody Creek Road
Property legal description Building envelope #9, OWS 5 <6000
Size of lot .4 Total square footage of the house
Water source
Private 'Nell
# of bedrooms in house
5 # of offices, lofts & similar
Caretaker unit n/a
# of bedrooms in caretaker unit
Designed for what # rooms (list)
Designed by
Mailing Address
Perc rate 13
in
Total square footage of the caretaKer unu
# of offices, lofts & similar sized rooms in caretaker uniq
5 BEDROOMS
Permit i ormation S �J
r;hurch & Associates, Inc
4501 Wadsworth Boulevard, Wheat
Profile hole depth -loft
Minimum Septic tank capacity 2,00 ) gallons
LCO 80033 1
\to groundwater or bed
rtimum Absorption are
Comments
loft
Drip field serves two houses
neer deign anday 30, 2003.
Septic permit approved per compliance with the engis ompartmentfconcretedtanks wl with a pump in a biotube
This permit is a TANK ONLY PERMIT for a 2,000 gallon twohich is
nvelope
pump vault. There is a common drip field to serve this Bupermitted
b EthisldepartmenEand the des gn engineer rp ttedo
under ISDS Permit # 03044. Any changes must be approvedy
ances between components of the system and physical features shall
them being made. Minimum horizontal dist
conform to the Pitkin County ISDS regulations.
This department does not endorse any brand of products. This
an as bit mustu It letter to this department e kept on-site during installation.
The engineer must do a final inspection of the ins�tht a
department must also 'be called for an inspection with a minir'rrum,_of 48 hours advanced notice.
Permit approved by: ` L
;. ti; Date:
eviewed and are considered
Plans and specifications of the r posed i ividualrsewage to the owner or the agent systemm the work iperfo
ndicated in accordance with the Pitkin
satisfactory. Permission is hereby grant from the date that the
ed County ISDS Regulation in effect at the time of issue. This permit becomes invalids6 d nhrit ng by the Departmentermi was
issued unless system construction has commenced or an extension has bewlroved
be issued.
As -built drawings must be included with this permit before the final appCva
Installer:
ate:
Final approval:
PITKIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT
APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM
0405 Castle Creek Road, Suite 10, Aspen Colorado 81611
Phone (970) 920-5070 Fax (970) 920-5077
Name of OWNER KA L A w+
Owner's Mailing Address
city, State, zip o < Business Phone:
Home Phone: E-mail Address:
Primary Contact Person (all communication regarding this permit will go through this person)
Name
Company
Contact Mailing
rc a 12- RGAdSc_
Address b
City'stote,zle
Business Phone: 0 - i2 - 7 k1
Cell Phone:
Fax: 017o -97,2. `74tF 1 E-mail Address:
Parcel ID # (available from assessor's office
at 920.5100 or at www.pltklnassesaor.aro) G Z V J
Street address of property (491 1) Wggjy CegtI� a of
Legal Description: Lot 4 ,Block Filing Subdivision N11a a
Size of lot: acres. f �, Type of propoaed structure:
IJ
Total square feet of house L („cru -iP4 # of bedrooms (potential) In house
Caretaker Unit: Attached ( ) Detached (
Total area(srft.) of caretaker unit # of bedrooms (potential) In caretaker unit I
Permit Is for: New Home (,f ) Repair due to failure ( ) RemodellAdditlon ( ) Emergency use i )
Water: Private well ( X ) Spring ( ) Stream ( ) Community/Public :Nater System ( )
If community system: Name of system
The fee for a ISDS application Is $600 for a permit that takes 6 hours or less for the department to approve. If approval takes
longer then 6 hours, a rate of $100 per hour will be charged. The maximum fee 15 31000. The basic fee of $600 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 iocatlons 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 Pltkin County codes. No construction may be undertaken until all
approvals and permits have been obtained.
The Pitkin County Environmental Health Department, Pitkin County and employees of these agencies will be hold harmless
should the Individual sewage disposal system fall or malfunction. The permit to construct Is issued on Information submitted by
the applicant or his/her representatives. The owner aseumes full responsibility In case of failure of the system.
Signature of applicant S44:
7
', `Vln�w Receipt # � / '6
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Contact Log Sheet N K c" AIZ)(
CHURCH & Associates, Inc.
ENGINEERS & GEOLOGISTS
May 30, 2003
BEACH Environmental LLC. ATTN: Seth
715 West Main, Suite 304
Aspen, Colorado 81611
Subject: Subsurface Investigation and Revised OWS Design
TWO MILE RANCH, OWS 5
Pitkin County, Colorado
Job No. 13288
Gentlemen,
As requested, we have investigated subsurface conditions and prepared a revised Onsite Wastewater
System (OWS) design for the site. The revisions are based on the addition of an onsite well from our
original report, dated July 26, 2002 and revised November 6, 2002. All previous designs should be
discarded to avoid confusion. Our firm investigated subsurface conditions on June 11, 2002.
SITE CONDITIONS
The investigated site includes two building envelopes, 9 and 10, at Two Mile Ranch as indicated on Figure
1. The subject site is located in a rural mountain area where OWS and wells are required. There is an
irrigation ditch to the north and Woody Creek to the south of the drain field location. The slope at the
proposed drain field is 11 percent to the southwest. There is a thick cover of native grasses at the
proposed field location.
PROPOSED CONSTRUCTION
The site includes two building envelopes, which are 0.4 -acre and 0.75 -acre in size as presented on Figures
1 and 2. OWS 5 will serve two homes. The average daily sewage load is 2000 gallons per day (GPD) as
presented in TABLE I below per Pitkin County Environmental Health Department (PCEHD) regulations.
The peak loading is 3 500 GPD. The drain field is proposed to the northwest of Building Envelope 10, as
indicated on Figure 2. The proposed drain field is 10 feet south of an irrigation ditch. The site is served
water by an onsite well, located 220+ feet northwest of the drain field area.
TABLE I, SUMMARY OF WASTEWATER LOADING
STRUCTLRE AREA, SF BEDROOMS AVERAGE q, GPD PEAK Q, GPD
0.4 Acre Lot
<6000
5
1000
1750
0.75 Acre Lot
<6000
5
1000
1750
TOTAL
n.a.
n.a.
2000 GPD
3500 GPD
DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 www.geo-church.com
303.463.9317 Fax: 303.463.9321 Toll Free -1.877.248.3123
Subsurface Investigation and Revised OWS 5 Design
QJob No. 13288W, 5/30/03
Page 2
A distance of 300 feet is required between the field and well per PCEHD regulations and 250 feet to
creeks for the 3500 GPD wastewater flow. Based on the use of AdvanTexTM units and an evaluation of
risk of contamination of surface and groundwater, it is not necessary to add 8 feet additional distance for
each 100 gallons of wastewater per day of design flow over 1000 gallons per day as specified in the table
to prevent contamination. The 220 -foot separation to the well and 50 -foot separation between the
proposed absorption area and surface water or ground water are appropriate to prevent contamination.
The owners have requested that PVC pipe not be used in construction at the property. HDPE pipe has
been substituted for PVC in specifications, except at the AdvanTexTM units. In several details we have not
changed the PVC description, but we have requested PVC components to be substituted with HDPE.
SUBSURFACE CONDITIONS
Subsurface conditions were investigated by drilling one profile hole and five percolation holes, 21 to 46
inches deep, at the locations indicated on Figure 2. Subsurface materials consisted of 1 foot of silty sand
topsoil underlain by reddish brown silty sand with random cobbles to the maximum depth explored of 10
feet. No ground water or bedrock was encountered during the excavation. The percolation test indicates
rates from 4 to 27 minutes per inch (MPI). The average percolation rate is 13 MPI. Percolation data is
included as Figure 8.
EXPERIMENTAL DRIP IRRIGATION SYSTEM
The proposed drip irrigation (shallow trench) OWS has been authorized as an experimental OWS in Pitkin
County. As a part of the authorization, there are conditions, which are not typical of other permits in Pitkin
County. The conditions include: a. the applicant must commit to follow recommendations of the Department
and the design engineer, b. a backup system design is required, c. monitoring of soil saturation and an annual
report is required and must be reported for 5 years, d. the site must be reviewed for solar and wind exposure.
You will have to agree to the following conditions: 1. you must agree to the terms of the permit, 2. a backup
design is an ETA bed design in the same area and 3. monitoring as described later in this letter will be required
which will include an annual report as described in Item C. The site has been reviewed as described under Site
Conditions and found suitable for installation of a drip -irrigation OWS. Twelve shallow trench drip irrigation
systems have been installed and are performing properly in Pitkin County, so we do not anticipate problems with
installation or performance of the OWS. There are 3 500+ successful drip irrigation OWS operating in Colorado.
RECOMMENDATIONS
The results of our investigation indicate an OWS can be installed as presented on Figure 2. The OWS
design is based on an average daily sewage load of 2000 GPD with an advanced treatment system and a
drip -irrigation drain field. A 2000 -gallon, two-compartment, precast concrete septic tank with a pump in a
Biotub6m pump vault is proposed at each building envelope, as indicated on Figure 2. The advanced
treatment installation includes two 1000 -gallon, single -compartment, precast concrete septic tanks, with an
AdvanTe)Clm AX20 Treatment System. Discharge is via a 500 -gallon tank with a pump vault unit (PVU)
with dual pumps, as presented on Figures 2 and 3. Pump specifications are included as Figures 6 and 7.
Similar to a recirculating sand filter, the AdvanTek m system provides treatment of organics, (total
suspended solids and BOD$) and nitrate reduction using effluent recirculation through a textile media
pods. The AdvanTexTm units treat the effluent before being discharged to the drain field by a dosing -pump.
A service contract is recommended for operation and maintenance of the advanced treatment system.
Subsurface Investigation and Revised OWS 5 Design
+ftN Job No. 13288W, 5/30/03
Page 3
The drain field installation must include ten 10 -foot by 70 -foot sections for a total of 7000 square feet (SF) of
drip -irrigation field as presented on Figures 2 and 9. The drip irrigation field configuration can be modified to fit
the topography with approval of our office. The trenches should be backfilled to re-establish the original slope.
The installation is presented with a trencher.
The surface of the drip irrigation or ETA field should be seeded after installation of the system. A native seed
mix available at seed stores should be used. These mixes do not require irrigation and develop a growth 10 to 15
inches high. No automatic sprinkler system should be installed over the field.
INSTALLATION OBSERVATIONS
The installation of the OWS is to be observed by the design engineer. We will verify field depth, separation
distances and subsurface conditions. The septic tank and AdvanTexTM units are to be installed with risers
on the tank, and inlet and outlet connections properly bedded. Other components such as eluent filters or
pumping systems, as applicable, will be observed at that time.
OPERATION AND MAINTENANCE
The AdvanTexTM treatment system is sold as a package that includes component installation and two years
of operation and maintenance. An operation and maintenance contract must exist at all times with a
certified AdvanTexTM maintenance company. During the first month of operation, the system is to be
observed to ensure proper control settings and system "startup". Subsequent to system "startup" a semi-
annual observation is to be performed. During the semi-annual observations, septic tank sludge and scum
accumulation is to be measured and septage pumping arranged as necessary. The treatment system
components are to be cleaned in accordance with the manufacturer's recommendations. Effluent quality is
to be observed to confirm a clear, odorless effluent is discharged to the drain field. The dosing system is to
be observed to verify its operation. The surface area over the drain field is to be observed for indications
of effluent surfacing. Liquid levels in the field are to be measured and recorded.
The owner must realize an OWS is different from public sewer service. The owner must be aware of, and
assume responsibility for, ongoing maintenance of the system. In the absence of a monitoring program, the
septic tank should 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 to reduce the frequency of pumping. Water use
must be monitored so toilets are not allowed to run when seals malfunction. To illustrate the point, a
flowing toilet can use in excess of 1000 GPD. An additional 1000 GPD loading may flood and irreparably
harm the system.
We caution against the installation of a water softener. The hydraulic loading from the backwash of a
water softener is detrimental to an OWS and a separate drywell should be constructed for the backwash
waste, if a softener is installed. No landscaping or plastic can be used over the field, which will reduce
performance of the field. Chemically treated water from a swimming pool or spas should not be introduced
to the OWS. The design of the OWS is based on the treatment of domestic sewage only. No industrial or
hazardous wastes should be introduced into the OWS. Floor drains should not discharge into the OWS.
Subsurface Investigation and Revised OWS 5 Design
Job No. 13288W, 5/30/03
Page 4
As a part of the experimental permit, there are conditions imposed by the PCEHD. The differences from other
installations are the requirements for monitoring of the installation of the drip -irrigation system. These may be
required because of a prior experience in Pitkin County with experimental systems. Drip -irrigation systems have
been installed in Pitkin County and there have been no problems. We anticipate the annual reporting will be a
requirement for five years and the cost is estimated to be $200.00 per year if the experimental status is required.
LIMITATIONS
Our investigation, layout, design, and recommendations are based on data submitted. If conditions dif-
ferent from those described in this report are encountered, we should be called to observe the conditions.
If proposed construction is changed, we should be notified to evaluate the effect of the changes on the
wastewater system. 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 be by
an experience installed and is to have demonstrated knowledge ofthe ISDS regulations and requirements.
If there are questions or if we can be of further service, please call. The
i 0 0 0 EC'.�s'T
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ON
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Sincerely,
CHURCH & Associates, Inc.
Timothy R. Petz
Project Manager
TRP/erb
5 copies sent via Priority Mail
Copy to PCEHD, Attn: Nancy MacKenzie
Reviewed by
Z
Edward O. Church,
3 c-)
is Tim Petz.
< TWO MILE RANCH, Ows #5
S23, T9S, R85W
PITKiN COUNTY, COLORADO
UTILITY CORRIDOR
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PRO -1:
FIGURE 8 - PERCOLATION TEST RESULTS
Two Mile Ranch - OWS #5 DATE OF TEST: 6/11/02
Pitkin County, Colorado
feet description
NO GROUNDWATER WAS ENCOUNTERED WITHIN EXCAVATION
1
AVG.
INTERVAL
DEPTH TIME DEPTH DEPTH
HOLE
HOLE CHANGE, PERC.
OF HOLE, INTERVAL, START, END,
PERC.
NUMBER (INCHES) RATE
(INCHES) (MINUTES) (INCHES) (INCHES)
RATE,
(MPI)
(MPI)
1
:30
20
13.63
22.00
8.38
2
20
22.00
29.00
7.00
3
20
9.13
16.00
6.88
3
20
16.00
19.00
3.00
7
20
19.00
21.25
2.25
9
20
21.25
23.25
2.00
10
10
2
21
20
12.50
21.00
8.50
2
20
12.00
21.00
9.00
2
20
12.25
18.25
6.00
3
20
12.25
17.25
5.00
4
20
12.13
17.25
5.13
4
20
12.00
17.00
5.00
4
4
3
37
20
12.25
22.25
10.00
2
20
22.25
26.75
4.50
4
20
26.75
28.25
1.50
13
20
28.25
29.50
1.25
16
20
29.50
30.50
1.00
20
20
30.50
31.25
0.75
27
27
JOB NO. 13288W
PRO - 1:
FIGURE 8 (CONT) - PERCOLATION TEST RESULTS
Two Mile Ranch - OWS #5 DATE OF TEST: 6/11/02
Pitkin County, Colorado
feet description
NO GROUNDWATER WAS ENCOUNTERED WITHIN EXCAVATION
4
AVG.
INTERVAL
DEPTH TIME DEPTH DEPTH
HOLE CHANGE, PERC.
HOLE
NUMBER OF HOLE, INTERVAL, START, END, (INCHES) RATE
pERC.
(INCHES) (MINUTES) (INCHES) (INCHES) (MPI)
RATE,
(MPI)
4
41
20
20.25
31.50
11.25
2
20
31.50
38.00
6.50
3
20
16.25
25.50
9.25
2
20
25.50
30.25
4.75
4
20
30.25
32.50
2.25
9
20
32.50
33.75
1.25
16
16
5
46
20
37.00
46.00
9.00
2
20
9.25
36.75
27.50
1
20
18.25
29.75
11.50
2
20
29.75
35.50
5.75
3
20
35.50
38.25
2.75
7
20
38.25
41.00
1 2.75
7
7
JOB NO. 13288W
%
TYPICAL PLAN VIEW EFFLUENT PUMP LINE
�- WITH PRESSURE RELEASE
\/AI \/C AT Llr'U f3i11AIT
DISTRIBUTIC
VALVE
2" BALL VALVE
HEADER
LEVE
MANIFOL
NO.
LENGTH
WIDTH
LINES
10
70
10
5
TYPICAL FIELD CROSS-SECTION
PVC
=NT PIPE
IG
ON
2" HDPE
�- 10'; IRRIGATION VENT PIPE
SPECIFICATIONS AND DESIGN CALCULATIONS
TREATMENT UNIT
1. TWO 1000 -GALLON, SINGLE -COMPARTMENT,
PRECAST CONCRETE SEPTIC TANKS WITH ADVANTEX
- TREATMENT SYSTEM FOLLOWED BY ONE
500 -GALLON LIFT STATION PVU WITH DUAL
ALTERNATING PUMPS
2. PUMP: SEE DETAIL
3, ALARM/CONTROL PANEL LOCATION AT OWNER'S
REQUEST
4. PRESSURE RELEASE VALVE AT HIGH POINT
5. DRAINBACK TO LIFT STATION AND FIELD
DISTRIBUTION FIELD
JRFACE
)PERSAL
JE
1. OWS: SEE TABLE 1 OF REPORT
2. SEWAGE LOADING = Q = 3500 GPD
3. PERCOLATION RATE = 13 MPI
4. APPLICATION RATE = R = 0.50 GAL/SF/DAY
5. AREA = (Q/R) = 7000 SF
6. PROPOSED FIELD AREA = 7000 SF
7. LINEAL FEET = 3500
B. TRENCH WIDTH = 8 INCHES
9. LANDSCAPING IS THE RESPONSIBILITY OF THE OWNER
JOB NO. 13288W TRENCH DETAILS FIGURE 9
Aug 05 03 12:48p Mandron Group 970 925 9173 P.1
Au 05 03 10:08a Stk n Conger Architects 1 970 1 4874 P.5
ROM : C�4 _ FAX NO. :303463W21 Aug. 05 2003 09:59AM P2
August 10, 1999
A4V9N . P maK
' 5lNMfNOMNrjlLHGCTN
We leave been notified that yo*u are •goinng' to install a Drip h igation sewage disposal
mem JOr Yom Property and we want to be sure that you, the pnPerty owner,
nmdW3i2Ud Whid-this means.
` . This is an aftarative method ofwastemmer disposal not provided for in the Pitkin
County Regulations. As suek it has been declared as experimental system and the
iasmflatibn of it toW of eighteen such systems have been approved.
Attached is a copy of Resolution 1199-34 which was adopted by the pitkm County
Boaid of C mmissionem, acting as the Pitkin County Board of Heath. We request
that you read the c:o &;Uons of the resolution and riga the bottom of this letter stating
that YOU uncicrstarid these condidem
We have taken these precautmnt because Drip Irriga don is an experimental system
in this area, Several hundred of dwsesystems have been installed as the Eastern
Slope. However, we do not bane historical data to know hove the system wiU perform
at this attitude and in the extreme and vwyhx weather conditions we experience.
Some conditions that must be islet before we can issue your septic
perm are as
follows:
9 Ifa "water balance" method of calculating waste load is applied, a moaitorinQ
Plan must be submitted to determine saturation status of soils.
After installation, you must provide a written report to this Department documenting
maintenances an the system for a period of five years, and submit it to this
.-Deparnnern in January of each year.
C►wnef Signature Date Address of Property
I understand.Resoiutma #9634
M Stun+ r"T.WA STxwr AMN, C01MADO Ilea -19n • FNQIU 170.!lD-M FAX M."ASI97
'W�/
MEIV[ORANDUM
To: Suzanne Wolff, Community Development Department
From: Nancy MacKenzie, Pitkin County Environmental Health Department
Date: December 5, 2002
Re: Two Mile Ranch Minor Amendment to a Development Permit
Parcel ID # 2643-094-00-001
SUMMARIZE APPLICATION: Establish "Activity envelopes" for the On-site wastewater
systems (OWS) serving building envelopes 5 (OWS 6),7&8 (OWS 4), and 9&10 (OWS 5).
The Pitkin County Environmental Health Department has reviewed the details of the Two Mile
Ranch application under the authority of the P'tkin County Land Use Code and has the
following comments. A site visit was made on November 26, 2002 with a representative from
Beach Environmental.
The water system for these building envelopes has not been established. A central water system
and/or wells has been discussed, but not finaled. The location of any well(s) would need to
meet required setback distances from the OWS, No further septic permits will be issued until a
water supply is in place.
There should be no vehicle traffic or construction staging in any areas proposed for the
absorption areas of the OWS.
It is best to design systems so that the septic tanks are close to the houses or buildings they
serve to provide a short run to the initial stage of treatment which occurs in the septic tank. The
leach fields can be a farther distance away from the tank since the effluent has had some
treatment and there is less risk that sewer pipes will clog. Another reason the tanks and
equipment for some of these system should be located close to habitable buildings or entrances
is because they are equipped with audible and visual alarms in case the systems are not
operating properly.
OWS #4
The mound for the septic system is not designed in the best area. The toe of the mound is
exactly 50 feet from Woody Creek. Because of the design flow of the system, the state
requirement is that the setback distance should be 250 feet. The engineer has designed an
advanced treatment stage and has made a statement that the 50 foot separation between the.
proposed absorption area and the creels is appropriate to prevent contamination. This is
allowed by State and County regulations.
PH.k,1 a lk yded Pnpir
However,. since there is adequate area on this property to design the system farther from the
creek, Environmental Health has been in discussion with the representative from Beach
Environmental and the engineer to reconfigure the design to keep it farther away from the
creek. This could be in an area that is not within the proposed "activity area".
Ground water was observed by the engineer at ground surface during the fall, so this site needs
to be re-evaluate by the engineer and Environmental Health again during high ground water
season next spring to determine the best location for the mound. Because of ground water, a
mound design is required to raise the system four feet above the level of the ground water.
OWS_#5
The area designated for the drip field is an appropriate site for this type of system. It is up and
away from the creek, on level ground, and is un -treed with good sun exposure. The tanks and
equipment for this system should be located close to habitable buildings or entrances because
they are equipped with audible and visual alarms in case the systems is not operating properly.
This site was not accessible due to deep snow cover. It must be evaluated by Environmental
Health and the engineer in the spring and during the season of high ground water. It appears
that the proposed leach field area is very close to the river. Ground water and set back distances
from the creek could be a concern_
The proposed design and size for the leach field will need to be re-evaluated when more soil
testing can be done since the soil data was not collected uniformly in the area of the field as
is required.
rdukd un Rapled rAM
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