HomeMy WebLinkAbout319 Grenada Glen - 210712107011 INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT
EAGLE COUNTY ENVIRONMENTAL HEALTH DEPARTMENT
Telephone: (970) 328-8755
P.O. Box 179 - 500 Broadway, Eagle, CO 81631
COPY OF PERMIT MUST BE POSTED AT INSTALLATION SITE.
PERMIT# IS-2601-07 BUILDING PERMIT# BP- 18327
OWNER: JOHN GLASBY PHONE: 011-4412-2624-8970
MAILING ADDRESS: 1 ROCKLEY OLD HALL; OLD HALL ROAD WORSBOROUGH BARNSLEY SOUTH YORKSHIRE
UK S705ND
APPLICANT: JIM FOLEY PHONE: 970-524-0546
SYSTEM LOCATION: 0319 GRANADA GLEN TAX PARCEL NO. 210712107011
LICENSED INSTALLER: DAVE BRONN LICENSE NO. 36-07 PHONE: 970-977-0261
DESIGN ENGINEER: JASON DEAN, HP GEOTECH, INC. PHONE: 970-468-1989
SYSTEM SIZED TO ACCOMODATE A 6 BEDROOM RESIDENCE:
INSTALLATION GRANTED FOR THE FOLLOWING: 2000 GALLON TWO COMPARTMENT TANK, 1875 SQUARE FEET OF
ABSORPTION AREA CREDIT VIA 94 Q-4 INFILTRATORS
SPECIAL INSTRUCTIONS:
DO NOT INSTALL IN WET WEATHER
CALL EAGLE COUNTY AND THE DESIGN ENGINEER FOR FINAL INSPECTION PRIOR TO BACK-FILLING ANY
PORTION OF THE INSTALLATION OR WITH ANY QUESTIONS.
THE BUILDING TCO AND CO WILL NOT BE ISSUED UNTIL THE SEPTIC SYSTEM HAS BEEN INSPECTED AND
APPROVED
INSTALL EXACTLY AS DEPICTED ON ENGINEER DESIGN SIGNED STAMPED DATED 4-11-07
ADD 28 FEET TO ALL SETBACK DISTANCES
ENVIRONMENTAL HEALTH APPROVAL: VICTOR CROCCO DATE: 4-24-07
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: 1875 SQUARE FEET ( VIA 94 Q-4 INFILTRATORS )
INSTALLED 2000 GALLON 2 COMPARTMENT SEPTIC TANK LOCATED AS DEPICTED ON HP GEOTECH AS BUILT,
JOB #407 0028, SIGNED, STAMPED, & DATED 05/09/2008
COMMENTS:
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: May 14, 2008
May 14,2008
John Glasby
1 Rockley Old Hall
Old Hall Road
Worsborough Barnsley
South Yorkshire,United Kingdom 5705 ND
RE:Final approval of Individual Sewage Disposal System ISDS Permit #2601-07;
Tax parcel #210712107011;Property location:0319 Granada Glen,Cordillera
Dear Mr Glasby,
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 6 bedroom additional dwelling
unit.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 web site links provided on the
Environmental Health Department’s home page at http://www.eaglecounty.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,your 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,
Terri Vroman
Administrative Technician IV
cc:ISDS permit folder
Eagle County Building Department
Chrono efile
Encl:Final ISDS Permit
Informative materials
April 24,2007
Dave Bronn
Bronn Excavating
PO Box 4867
Eagle,CO 81631
RE:Issuance of Individual Sewage Disposal System (ISDS)Permit #2601-07;Tax Parcel #
210712107011;Property Location.0319 Granada Glen,Cordillera
Dear Dave,
Please find enclosed ISDS permit,number ISDS #2601-07 to conduct the construction exactly as indicated on the
permit.It remains valid for 120 days or for the duration of a current building permit.The enclosed copy of the
permit must be posted at the installation site.Any changes in plans or specifications must be pre-approved by this
department.If you are receiving this permit and have not been contracted to perform the installation,please contact
us immediately.
Also enclosed is a final inspection completeness check list to assist you in making sure all of the detailed points of
an inspection have been properly addressed before calling for your final inspection.It is important to pay close
attention to the special conditions which may have been included to address site specific issues.All components of
the system must be exposed for our inspection.Projects that require multiple inspections will be assessed a
re-inspection fee of $55.00 payable before or at the time of inspection.It is extremely important to remember to
rake all infiltrative surfaces and avoid installing systems in wet or frozen ground.
If unfavorable conditions prevail between the installation and the final inspection (such as snow)special precautions
must be taken to protect the drain field area from the elements.
Please keep this office informed regarding the progress of your installation so we can provide responsive customer
service when scheduling your final inspection.The Temporary Occupancy Permit (TCO)associated with the
building permit cannot be issued without the septic system being finally inspected.
If you have any questions,please feel free to contact us at (970)328-8755.
Sincerely,
Terri Vroman,Administrative Technician IV
cc:electronic permit folder
electronic chronological file
hard copy permit file
HP Geotec
Enclosures:ISDS Permit #2601-07
Final Inspection Completeness Checklist
co
cq
Ito
Ln
w V 'O❑ t ..N. O p, b N �
7 A b OA 0 q p °� a°+ V .� w > b M
O N N ° N N V� i+ O � O �D
to'
cn O .°dal p ti V. N a O N p+�
a o u n A ° �r n v cvi 3 �7 y '� a r
M0 Taaaa4� Oil 0
��qNq 'fly" �I .i-1 cA� `�/ �j y 4J @ ° N Y N ^
o T-I w o � •pjy yO y c) PV. N ar V q 0
V N a
to
o to 0
,,q
L 3 0 v o4 pp • 2❑❑1 O V P. v°i b o 0 N N ❑ k� V O b
3 c o eai 6 9b N V V R, N A ri � •' 0
O �: P O v
X coo
0-1 •� C j o � s°.� 4i rig555o a� 'c� a"i c°i N
:d cT N o q '+ y o °J *' q q W b P,
° o ° I' W Ito
.d ° by a m N o 'o, q o 0
C7 i 'u ° m °
to
to 0V ° A q v
� bA �m'd o oat'Udo •y p ° ro° $° , . � wa°' °
M
el) Cd
U ng "' P O d o to o u o .o O ,.Oq p a a W ai
z OA u N •''� C7 'd �V+ V y by [—i tq' cam, _O 4
S q q N Y .cai p V � O V q m
bh
Y¢ T o •ti Uj y w o d � wd
Lij0v ° ,o
p, M oq
rad vat�a°� o p°p
rA ai
o
° at Ctat: 99 •o o v .� �i' y o* o
CD
o to alo ro x �p N o aNi `°' o
"CD
p ° 1 •,1�� a�'i a � •F
O o m 0 TaaaA co 5+ ' ie V q q o
LLIqq }. qi 4) V
pi ,c7° 'd o O m N '" �P+. o y o to O o
d •� O �r n A d A d W v > °� 9 pi p,
3
G
v
C7
a b �oY
N '. V] ri O O a 'A r.9 y p C 5 o R
" ,~�q A ° qqy •env y 6a�i �i z +� iao• .cue
6n 9 5 '� aNi o a ti
o B G
°'O ON Sy7 `*'� •h0o ° o
0 , F
a o ,ph
0,4
�i a a abi o v
o0 .d o "0'm .jcj la. o°Jn as q o w abi � t o A
o o a t o o 3 o
o 5 qs 0 0 S �� o o � a U� ���i o o�
^d y 0 V A 0 O o ° N 0 O O gyp., Fi cad W
6 96
N a m
3 tiN It
°2 v o o v� 1o m o w o
2 iv w 'oA y o w , 0 b
b°
' 4+ B
ti m •Ig o p *� oa o ' U 0 w to) v
N o m o gp 4, C `� �3 p 9 N C °
pit
14 e�3�00" � o � � v � � � o y '! � 'aY .s44 0 q o � n ro
d 14
W
vAV] m Go
O
° '0 a boW 40
° °rA
w a H m a ',0Lijy P.O 0 Q
Q bA O Y q
Urig 9 4
Y O 0 .Pn i C
N
°p O y SC O a 0 Pau
• p4g "0 0 "CS tYd ° N N id t� 9 N
c6 N s, •L7 1� iy
o v b oP,U 00
0 o
"3 R
a s� w v w
'b N
O t O+ .O �c�cQQyy `� O N
ro
4a Y qM N N 4 yyNyy O U .-o 45 YO {QjJ
o N a a o o o Nrg000roa rnoWU
A ', °¢
fl
'b O y o O
ro
N '"ca Fb o o g b
o b m °a 'p c ' 4,1
A N °A
o o a 0 0 d� w do
ea o
a 4 P�° O s� o q � w °° b o
o CA a o N q a a0i do 0
'P, Pa 0 m P o n, aoi °' o
o u
75 b a ��ba
.� .O d i o H p ^c7
Yn y 40. 'gOO '� •.N" 'vOC. a�Wi .00 p, ;�+Q �i 2 0 �o b
'y ¢, 0 p d .� 'N "t7 W O ^7 a 0 0 b
P 'a o O N
°+ o v o ° $ Q° o 0n
v o o 749 a"§ o a �' o' c a 3 o w
N id Y O yOy..�� ,tpd U p
4J N N N N g ° OJ] Npg
o b
44
° O
do) .°a o v a� y �0 3 a4
t�� o o =y U 6b o p N o
N a a ti a a U q o a o
�r m or U
to 0 0 o bpi a o bn a v
p 0 9 ro
l o .o o o A abi c°000,
a
cl
v.0 Fa
o b ;a ° o°n 44oc�y.� o 48
° v b N o 0 N
v ° o y
U .o •'N cC a b a V N 0 > 1 U ° 0 N ° jUg 4 o
N a .0 ° o o a 4 ca m
I to
E a n 'a°i .1� v o y ai ao C 6 ei v .� o
cOi ° w +5 �y y eoi N ti q E °r W' cOAa c°�i qy N
p o d �' �° w o o �g yN d A rN 0 °q
or Cd
C7 �r � '� ° c o •� o � o U '� � � �°
°' o
0o �a�7 `m '� v
° Qa a ai 'tea � a, l + u ra 4 U b W No �¢ U ri W
0
R,
C,
•°
N
0
U
to ep
o
o°
a00
a �
c W p € 1
p
a o�• yOaa> W•`v.�ktq°Uo ad�a2a �gA�+dfi°.J dvt�i;C63t Ay-cUtUVaOUOq�d 7ii .�NcNqqyyotl
.bo°Naoa�� ��3jUq�❑❑°pNn7y'
07vtiNUa.am A
qEd p
MO rs U cd' A "
,Upao w P. rd •g C
Oy o w o
w
h
b
o 0 � b
N Palr�jItot
0 Cc Y
o CAA wig+3
q q E o
b J
q
..�....,�It
yam'
Aat
> f3 0 N v ;� v ':a_i
oIto R ' aoi CMC
It
as
�.�:
Mato
pq
o°
U
to
o c14,P
7 0.�1 v cpi y •q �% p t�
p P b x CWh
tadBe A i-I G W U N
F U N
6 c g •q '0 0 U
p a w
Pang
Tama
Cd topei (Wa� o '°;'S a o°
o°'n N p �� a o W W o b�� CG W f4 9 6 d
O pFo�nFx�v �
c�pm�c DOgAm
-
�EOD-c 0,
Nz�o
m m
Zo , �i0
NZ 0Fm
aim N cm
z
S
X OONONOO�O
ti
C z
ti z
2 �
m c
�D c Am�CDO ~ z
i mNnAm g ar
C O mC O o
m2 n Z yNy
N Z NDN Z
m
N A N
O
00 0R qc
m < g n o = o
o O N O 0�
<oz
o�
F\z
/ I r
w �\ / l ^�
o I/'I / \\\ / ��� I 1 AD
GRAN A GLEN/
D� fl 0mm�'�,(7�
Z�
ent
'i / ym00\-L_� I ( I �sO
R. Pp9e �v9
-u Oo co 1 /
2�O�O=
O= D O
2 �1 m r0= / \ Q /
60,
I I v+ / OD
I I N0
OCL/ i I / / co r
I /CD
o
cn
c)\ I I QII Z coop
m I
Mm p
moo
m X
mOm I,
/L mm-D=
I-om goo'
/
D
J �
l lr° `"
N� ONa
I 1 II
1 m /-,068L-�
z �o
o
�I
=x
II D
o m
m�
mn
-i � o
m �
Aw-«e
% \ _ §
r 0 2 » o
2 : E
E \
co , \ } E f
[ _ \ _ { §
_ /\ ) \r
\ \\ _ /IL
k 0 \E §\
�E
e/ \ E \ _ /%
LU / 2
CD
\\ §) Y - \ ) \ 2
Ir /FL
K_
§ - 2 0 <
co { \ / [ \
_
§ = 6 - Q
- /
2 - \ U\
c \ } \ Z - J§
\ ( \ 0 - Z )
ca
\ \ \E \ \\ j 3§
\ \ %[ [
\ \ Q c
/ \
jjȤ /\ CO \\\
)
/ \\ \
mwmdm \§
w w r , r = �
LL
LLI
Ir
CO
—
z
wcr
N
F
O
O
M
V
Q..
N
Q
Q
cam-
Q
FN
N
N
rMcn-
M
W
d
O
N
O
O
r
Uf
MI
> W
rM
NI
rN
O
w
M
�_--_,
Y
r
..
..
..
..
If
..
..
..
..
..
-
—
-
-__
W
2
-
I
Ce
LU
C.'3 OU
�LLMr
W
W
Ia-
m
F
m
E
F�-Q
C
E
KC%j
W
W
I�
0.
�0U)
C0
—�o�
._�...
�o�
�WW
J_IM
J
-�_
J
.__I.-..
pi
W-
Q
g
J
F
�_.>,
____
g
J
F
,_.—
....._.-
LL'
J
(�
Ill
o�=ol<
LL d
aF
o
�
O
O11
a
�a
o
O
LL
�..
'a
LL
I
II
f.
W
F'
O
D
i
0
QQ
I
c
��OiI
r
-i
O
W
W
W
L
W
�[
-
O
___
..
__
.___._
-
__1
W
t-.
__._.____
a.
_
-.-
W
Fz
1
Q
C
M
r.Fm
00
M
M
M
N
N
Q
�_
M
Q
)
W
a
�V
Q
W
}�
a'
O�
r
._
r
r
M
r
N
N
V
CO
h
W
OJ
CO
J
co
O
_
E
Q
O
I
I
CNIJ
co
d
J
d
_
Z
C
N
d'
d'
7
Z
J
^
7
V
V
N
N
N
N
Z
d'
r
r
M
M
r
M
r
M
M
r
J
LL�v
W
cam-
r
W
Q
'.C_..
r
N
ram-
cam-
J
`Q
U..
M
N
3
U)
I
1
E(
I
g
r
(
LLI
_
o
0
0
0
0
0
0
0
W
F
o
0
0
0
0
0
0
o
Y
O
F
FEr
FEr
¢
I
o
f!
w
-
-�—LU
-
Wt
w
IN
o O
>y LL
A � QO O
a oJ
o J z
U id �i a" � Q H
W J
p v 3 0
4w°'a O
o O O O y,� W "d U Q w
o$ ° 3 y a`i 46 o
bA a P4 p R� P� W A wp" y i q N M O
u U
.E3 m
A O a m r ° ,oq ° r° '� �n ° z
N II G7 U v 'b 0 'd O N vl II O O O m
'-i O
p la ° a O g z
o a o
o �u
A II II II 5 II II II u o �' Uo
a in z N� 'O Y
r4s•p
F+
°
0 et
O O O O co
NO O C)
®§ \ }
/ )C) G
Ir UL C ) LL
5/\\
Ne \}33 - \[/ §
C) ([§) mocl § ±
) ®~®`} § CC
)}§K [ §
§\,))ƒ ®CL
/GR\/§ 2 \
Q )//03 /\
93\/ }()2/) a , /b
\[)§ e ) E ±
) �®
cCc
l [2) » { az
j)/r« \) ` �)
\}} \}\\\ �\
§
/Ir k§a
/} \ WW
7
/oe 0 (
f/ /\\ 0
(
cl
2[) �o \
\\ `> \> �J\
/\ ®x
\Cc E ;/ \ [
/ M f
\§W / <cc OD
o®z §§ m
\§\F \
2§m\ \\ 0 (
O C7 M w m
Opz zw 00 D
= LL]FCo� 7)
d Z ¢ L.L
W W
F 0
wuj CW
ma. —II U IIII I I �¢ LLOLL
Co 0O WwU2 �
w=X w(o
(i) z o
o� C—¢a
JO
uJ U
� Z
Q w
III —III —I 1=I I r 0
III=1 I I —I I I —I— F
ir z
M w 0
> m C z
Q
O
— 'Cr,_ w
II l I l i Wz —III—III—III-1 o J
0 ¢
Lli i- z I I=1 I I-1 I I-11=III— z Co z¢
_ z Co zo =
00 — z a OF Ir Co ^U,,�
9 O �o � p a':
. wF o
nt
U�U8�1W
wLL z
? Q 0. C
0 (D W 2 0 nL�
FC �O
Fo—OOZOO
O 2
U) �aU w0 d¢
�v x
pw to, z
°0--,mp00 0 LL waw
a 1 1 1- (1 O¢ 44 LL zd 0 zo o w cc w a co
'aa ¢�—LL ¢ul z z cv ai v00) IN
0
0
v
w
ir
C3
LL
�z
0
NIN 9 o w
JNIOddS H]iW1O-Ol-U3iN33 0 CC z
U 0
w 0
0z
j w
o F
lie L = z
0
C6
0cc
0
z0
J m
LL Q
HIAOO�IOS'NIN ZI o a
adAOO 3A ViDDEIA HSIM8d1S3
u
Z
U
MOldt�3A0 N011bA3131N3FJ3ddl4 V o
dada) WNIJIaO
I(� a
O
3
a
w
x
co
N
O
O
O
d'
Q
LTAR
Where:
A = minimum absorption area in square feet
Q = design flow
LTAR = long term acceptance rate
Where:
75 = (constant) estimated average gallons of flow per day per person
6 = number of bedrooms
2 = (constant) estimated persons per bedroom
1.5 = (constant)calculated design flow is 150% of average daily flow
Q = 1,350 gallons per day
LTAR = 0.72 gallons per day per square foot
A = 1,875 square feet
Reduction Factor = 0.5
Minimum Absorption Area = 938
Minimum Number of Chambers = 94
ISDS ABSORPTION AREA CALCULATIONS
Q = (75)(6)(2)(1.5)
A =
The absorption area will consist five absorption trenches between 10 and 25 chambers long with a 6 foot
minimum separation from the center of each chamber to the center of the chambers in the adjacent rows.
Infiltrator Quick 4™ Standard chambers will be utilized in the absorption area. Each chamber will be given
10 ft2 of absorption area. A 40% reduction in field size will be applied for using Infiltrator Quick 4™.
In accordance with the current Eagle County Land Use Regulations for Individual Sewage Disposal Systems,
the required absorption area was calcualated using the following equation:
1pri135 2007
Hepworth-pawlak Geotechnical, Inc.
P. O. Drawer 1887
Silverthorne, Colorado 80198
Phone:970-468-1989
Fax:970.468-5891
email hpgeo4@hpgeocech.com
John Gla
1 Rockley Old Hall
Old Hall Road
Worsborough Barnsley
South Yorkshire, United Kingdom 5705ND
Job No. 407 0028
Subject: Percolation Testing and Individual Sewage Disposal System Design,
Proposed Residence, Lot 10, Filing 3, The Divide at Cordillera, Eagle County,
Colorado,
Dear Mr. Glasby:
As requested, Hepworth-Pawlak Geotechnical, Inc. has designed an Individual Sewage
Disposal System (ISDS) based on the percolation rate of the subsoils for the proposed
residence located at 319 Granada Glen. The study was conducted in accordance with our
written agreement to you dated February 13, 2007. The data obtained and our ISDS design
recommendations based on the proposed construction and subsurface conditions encountered
are presented in this report.
Site Conditions: The project site slopes moderately down to the southwest and site
vegetation generally consists of sagebrush, grasses, aspen trees and pine trees. The site is
about 2.2 acres in size. Water service will be provided to the proposed residence by a
community water supply system. The proposed residence will be a two story wood frame
building constructed over a walkout basement. We assume that the lower level floors will be
slab -on -grade.
Percolation Test: Percolation tests were conducted on March 28, 2007 to evaluate the
percolation rate of the natural soils at the site. One Profile Pit and three percolation test pits
were excavated at the approximate locations shown on Figure 1. The test holes were hand
excavated at the bottom of the shallow backhoe pits and were soaked with water for 8 to 24
hours prior to testing. The soils exposed in the Profile Pit consist of 3 feet of sandy to very
sandy, organic silt overlying about 5 feet of slightly sandy, slightly gravelly silt to the depth
explored. The soils exposed in the percolation test holes were similar to those observed in the
Glenwood Springs 97(7-445-7988 � Packer 303.841-7119 Cotor�ldo Springs 719.6.33-5562
John Glasby
Apri13, 2007
Page 2
Profile Pit. Percolation tests were performed at depths ranging from about 27 to 36.5 inches
below the adjacent ground surface. The average soil percolation rate is 14 minutes per inch
and the percolation test results are presented on Figure 3, which corresponds to a long term
acceptance rate (LTAR) of 0.72 gallons per square foot per day. The LTAR was used in the
calculations to size the ISDS absorption area.
ISDS Analysis: Based on the subsurface conditions encountered and the percolation test
results, the tested area is suitable for an ISDS utilizing Infiltrator chambers and the shallow
soils for the treatment and dispersal of effluent. A site plan showing the proposed ISDS,
proposed residence, building envelope, disturbance envelope, and the minimum horizontal
setback distances of site features relative to the ISDS components is shown on Figure 1. The
ISDS was designed for a total of six bedrooms. All materials and installation should meet the
requirements of the current Eagle County Individual Sewage Disposal System Regulations.
Septic Tank: A concrete 2,000 gallon, two chamber, Front Range Precast septic tank, or
equivalent, will be used for primary treatment of sewage from the residence. An effluent
filter will be installed on the outlet of the second chamber of the septic tank. Sewage will
gravity feed from the proposed residence to the septic tank and effluent will be gravity fed to
the absorption area.
If the septic tank access riser lids will be installed at grade, with no backfill cover, then the
lids should be insulated with foam insulation board to provide frost protection. The sewer
pipe inlet tee in the first chamber of the septic tank should be installed beneath the access lid
of the fist chamber of the septic tank so that it can he reached for service should it become
clogged. The PVC. handle on the effluent filter should be extended up to within reach of the
dosing chamber access riser lid. This will allow for easy access and maintenance of the filter.
Approximately 2 feet of soil backfrll cover should be placed over the top of the septic tank to
aHow for easy access and frost protection. For maintenance reasons deep tank installations
should be avoided and we should be contacted to evaluate this ISDS design should it appear
that a deep tank installation involving more than 4 feet of backfill soil over the top of the
septic tank may be required.
Job No. 407 0028
John Glasby
Apri13, 2007
Page 3
Sewer and Effluent Piping: The sewer line from the proposed residence to the septic tank
should not be less than the diameter of the building drain and not less than 4 inches in
diameter and will service all levels of the proposed residence. Soil backfill beneath the sewer
pipe must be adequately bedded and compacted to prevent settlement of the pipe. The sewer
pipe should be installed in landscape areas with at least 2 feet of soil backfill covering the
pipe, or the pipe should be insulated on the top and sides with 2 inch thick rigid foam
insulation board for frost protection. Beneath driven surfaces we suggest Schedule 40 PVC
sewer pipe should be used and the pipe should be insulated if it will be installed with less than
4 feet of backfill soil cover.
We suggest the use of Schedule 40 PVC pipe between the proposed residence and the septic
tank, though this is not required by local regulations. The portion of the sewer pipe extending
from 5 feet outside the building foundation should have a slope of at least 2%. Cleanout
pipes should be installed in the sewer line adjacent from the building foundation, adjacent to
the inlet of the septic tank, where the sewer pipe bends at 90 degrees or more and at least one
ceanout should be installed at least every 100 linear feet of non -pressurized sewer or effluent
pipe throughout its length. We recommend that a straight section of pipe be installed between
the residence foundation and the septic tank. Any required 90 degree bends in the sewer pipe
should be accomplished through the use of a series of 45 degree smooth elbows or a 90
degree long sweep to help prevent clogging of the pipe.
Absorption Area: The soil absorption area is designed to be 1,130 square feet and will have
two absorption beds consisting of Infiltrator Quick 4 Standard chambers. Each chamber was
given 10 square feet of absorption area per Eagle County regulations. The western most bed
will be three (3) chambers wide by nineteen (19) chambers long (57 chambers) and the
eastern most bed will be four (4) chambers wide by fourteen (14) chambers long (56
chambers) for a total of 113 chambers. The absorption beds should be excavated to the
approximate depths shown on Figure 6. Care must be taken during installation to ensure that
the soils exposed in the bottom and sidewalls of the bed excavations are not compacted.
)nee the bed excavations are complete it should be left open, if necessary, to allow the soils
to air dry prior to placement of the Infiltrator chambers and distribution pipes. Once the soils
lob No. 407 0028
John Glasby
April 3, 2007
Page 4
have air dried, if necessary, the bottom and sidewaus of the excavation should be scarified
prior to placement of the chambers and piping.
The on -site soils can be used as backfill over the chambers and should be graded to deflect
surface water and precipitation away from the absorption area. We recommend the soil
backfill be re -vegetated as soon as possible with a mountain meadow grass mix or suitable
equivalent. It is important not to plant large vegetation or vegetation with invasive roots in
and around the absorption area and manifold piping as the roots may damage piping.
Combination air vent/inspection ports should be installed at each corner of the absorption
beds. The ports should be constructed of 4 inch diameter PVC pipe installed into the
knockouts provided on the tops of the Infiltrator chambers. The ports should extend a
minimum of 8 inches above the ground surface and should have ventilated removable caps.
Eagle County requires that the vent holes of the inspection ports be covered with #16 fly-tite
screen. The absorption area manifold and distribution piping layout is shown on Figure 5.
All materials used and installation methods should meet the requirements of the current Eagle
County Land Use Regulations for Individual Sewage Disposal Systems,
Subsurface Drainage: No free water was encountered in the Profile Pit when observed on
February 23, 2007 and it is our opinion that a subsurface drain will not be required. If free
water is encountered in any excavations on the site we should be notified to re-evaluate the
need for a subsurface drain to protect the absorption area.
ISDS Maintenance: The on -site ISDS will require maintenance. The level of maintenance
will vary with the complexity of the system and water use habits of the users. We
recommend that fats, oils, bath oils, greases, paint, solids, water softener backwash solution,
water from hot tubs and other constituents that can clog and foul collection and disposal
equipment are not disposed of in the residence drains. The absorption area and any areas
directly up gradient of it should not be watered by lawn irrigation systems or other means as
the soils may become hydraulically overloaded. The septic tank should be pumped whenever
Job No. 407 0028
C�teCh
John Glasby
April 3, 2007
Page 5
the sludge occupies 1/3 of the liquid capacity of the first chamber of the septic tank. In
addition, the effluent filter should be checked for clogging at least once per year and cleaned
as necessary. We recommend that an operation and maintenance manual be developed for the
ISDS. The ISDS should be operated and maintained as stipulated in the manual. If you
desire our services, we can prepare the operation and maintenance manual for the on -site
ISDS.
Limitations: This design has been conducted in accordance with generally accepted
engineering principles and practices in this area at this time. We make no warranty either
express or implied. The conclusions and recommendations submitted in this report are based
upon the data obtained from the Profile Pit and percolation test holes excavated at the
approximate locations indicated on Figure 1 and to the depths shown on Figures 2 and 3, the
proposed type of construction, and our experience in the area. Our findings include
interpolation and extrapolation of the subsurface conditions identified at the Profile Pit and
percolation test holes 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.
Based on site reconnaissance, it is our opinion that the designed location of the ISDS does not
violate any setback requirements of the current Eagle County Environmental Health
Department's ISDS regulations. The staked locations of the ISDS components are
approximate and not for construction. We recommend that the position of the ISDS
components, proposed residence and setback requirements be verified in the field by a
Professional Land Surveyor licensed in the State of Colorado.
This report has been prepared for the exclusive use by our client for the ISDS design
submittal process. 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 ISDS construction to review and monitor the implementation of our
recommendations, and to verify that the recommendations have been appropriately
No. 407 0028
G@CPt@Ch
John Glasby
April 3. 2007
Page 6
interpreted. We recommend on -site observation of the absorption area excavation, gravel
placement, pipe and tank installation, and soil backfill placement by a representative of the
geotechnical engineer. On -site observations of the ISDS installation or other out of scope
services will be provided for an additional cost.
Eagle County requires that an As -Built evaluation of engineered ISDS designs be performed
by the ISDS engineer. We should be contacted to perform the ISDS As -Built evaluation the
day before you are ready for the evaluation. Prior to evaluation, all ISDS components should
be installed including: sewer pipe, effluent pipe, septic tank, effluent filter, inlet and outlet
tees, Infiltrator chambers and distribution piping. No components of the ISDS should be
backfilled prior to our performing the ISDS As -built evaluation.
Please contact us for any necessary revisions or discussion after review of this report by the
Eagle County Environmental Health Department. If you have any questions, or if we may be
of further assistance, please let us know.
Sincerely,
HEPWORTH - PAWLAK GEOTECEMCAL, INC.
Jason A. Deem
Project Geologist
Reviewed by:
Ronald J. IJhle, P.E., C.C.E.
Associate
Attachments: Figures I through 6
Job No. 407 0028
I
i I
t
I
I
t �
� I � I
� � 1
\\y(r
% /_�_
/ t
1
s""�, i z
wq r� m
`( ��� � a
I M%� rr ,...f��.
J ;.
/ },``
1 (\
t
.�..oso.o' --- � �\
'�. � -t
a,(
r --
/ ~� ,
� \ ,
� \
� ,�
PROPOSED ABSdRPT10N BED 1
CONSISTING OFjINFILTRATOR QUICK
4 STANDARD CHAMBERS. FOUR (4J
CHAMBER WIpE BV FOURTEEN (14)
CHAMBERSt.ONG l56 TOTAL) � `�
� � �� �
� � \ \
\ \� \�` \?s:..
\\ �\ \_
�\ �
a
�� lOT 10 \ ��.�
\2.19®res
i _'.��� r..._<
\ \
\ �
� � _ �,.,�
�� �,, � ��`�., � r., � ., ��
� B,
�•�•
���✓1t �
���,�a.��•
5,
��i �fi
' Z 1 1 - ---
s
�\ � \��`
� � \\ �
r" ^}'�� � '�/� '
-„ � � \ "" CHAMBER FRONT ^"� �. -.� �� p /// '
MANIFOLD %% G \ - PRECAST SEPTIC TANK ' � .���� �� � % y `�\ / � ~ of
� SLOPED AT 2%�IN. EQUIPPED WITHAN EFF '��+``+qqF}T j ,p
\ / TO DRAIN TO ` FILTER ATOIJTIEf OFT�NF\ �\ \ N� X / �
4 ABSORP710N BED\ � ",� " �� ``\ `f o
\ \` � _ _ �LSTAIBUA9,Y-_--.-_�IS7AI %WITH ONE Ii s \\ A / � � � (�
\ PIPING SLOPED pT eURBN BQ,
�, \ 2%MIN.TO DR0.�N INLETAND NIO OUTLETS- ` �� �(�
\ ` BEDS ORP710N INSTALLED LEVEL - \`�\ I
V ,� - ,......� N��.
... 60 � � ,. 4g �W � _
� _ -,
�,
__ � ,
'6
I;HAMBEH 4VIUE BY NINETEEN D9) \ '\.
CHAMBERS LONG (51 TOTAL? `J
LEGEND - ............. _. _._ --- "
� PERCOLATION TEST HOLE
■ PROFILE PIT
\ // Slte Beni mark
/ fou�d, t t/2' olurr��in m copp
�5 rebar, PLS {28967
Top Co�t�EL — 7883.95
/ 5312.2fi2~W
/ APPROXIMATE SCALE:
1 INCH = 30 FEET
LOT 10, FILING 3, THE DIVIDE AT CORDILLERA
ISDS SITE PLAN
HEPWORTH�PAWLAK GEOTECHNICAL
407 0028 FIGURE 1
�.,;r-,„
PROFILE PIT
0
ELEV. = 7,862'
0
11 N
5 5 L
a r
a) a
� p
10 10
LEGEND:
MSILT (OL); sandy to very sandy, with organics, stiff, moist, orange and brown.
F1SILT (ML); slightly sandy, slightly gravelly, minor organics noted, stiff, slightly moist, brown.
NOTES:
1. The profile pit was excavated on February 23, 2007 with a trackhoe.
2. The location of profile pit was measured approximately by pacing from features shown on the site plan provided.
3. The elevation of profile pit was obtained by interpolation between contours shown on the site plan provided and
checked by instrument level.
4. The profile pit location and elevation should be considered accurate only to the degree implied by the method used.
5. The lines between materials shown on the profile pit log represent the approximate boundaries between material types
and transitions may be gradual.
6. No free water was encountered in the profile pit at the time of excavation. Fluctuation in water level may occur with
time.
4070028 Ge Ptech LOT 10, FILING 3, THE DIVIDE AT CORDILLERA
HEPWORTH PAWLAKGEOTECHNICAL LOG OF PROFILE PIT FIGURE 2
In accordance with the cunent Eagle County Land Use Regulations for Individual Sewage Disposal Systems,
the required absorption area was calcualated using the following equation:
A= Q
LTAR
Where:
A = trvninnnn absorption area in square feet
Q = design flow
LTAR = long term acceptance rate
Where:
75 = (constant) estimated average gallons of flow per day per person
6 = number ofbedroorns
2 = (constant) estimated persons per bedroom
1.5 = (constant)calculated design flow is 150% of average daily flow
Q = 1,350 gallons per day
LTAR= 0.72 gallons per day per square foot
A= 1,87s squarefeet
Infiltrator Quick 4TM Standard chambers will be uhlizsd in the absorption area. Each chamber will be given
10 $2 of absorption area. A 40% reduction infield size will be applied for using Infiltrator Quick 4TM.
Reduction Factor = 0.6
MniurnnnAbsorptionArea= 1,12s square feet
M>nnmunNumber of Chambers- 113
The absorption area wi71 consist oftwo absorprion beds. One bed will be three (3) chambers wide by
nineteen (19) chambers long (s7 chambers) and the other bed wrT be four (4) chamber wide by fourteen (14)
chambers long (56 chambers) for a total of 113 chambers.
407 0028 Ge Ptech I LOT 10, FILING 3, THE DIVIDE AT CORDILLERA
HEPWORTH-PAWLAKGEOTECHNICAL ABSORPTION AREA CALCULATIONS FIGURE 4
-
�-)`-�_
PRE-SOAK
�
FROM
TO
DATE 3/27/2007
3/28l2007
HOLE NO. 1
TIME 12:00
10:30
TIME
FALL
RATE
(min}
(in)
(miNin)
1
1 1/2
0.7
DIAMETER (in):
12
1
1/4
4
TOTAL DEPTH (in):
36 1/2
1
3/4
1.3
WATER DEPTH AT START (in):
17 3/4
1
3/4
1.3
1
1
1
_
1
3
0.3
TYPE OF SOIL:
Sandy Silt
r--
AVERAGE
RATE
(miNin) =
NO PERC
RATE
e
�^
�
�
�
HOLE NO. 2
��
`
TIME
(min) �
FALL
(in)
RATE
(min/in)
-```�`
f'
--
10
1 1/4
8
�,____J
D R in
Oi
10
10
3/4
13
TOTAL DEPTH (in):
35
4i
10
3/4
13
WATER DEPTH AT START (in):
4
1/2
10
3/4
13.3
10
1/2
20
�"
10
1/2
20
TYPE OF SOIL:
Sandy Silt
—'
10
1!2
20
10
1/2
20
AVERAGE
RATE (miNin) =
20
HOLE NO. 3
TIME
FALL
RATE
(min)
(in)
(miNin)
10
3 3/4
3
DIAMETER (fn):
10
10
2 1/2
4
TOTAL DEPTH (in):
27
10
2
5
WATER DEPTH AT START (in):
5
10
1 3/4
6
10
1 1/2
7
10
1 1/4
8
TYPE OF SOIL:
Sandy Silt
10
1 1/4
8
�'
10
1 1/4
8
AVERAGE RATE
(mINiN =
�� 8
' (_
SOIL PERCOLATION RATE
(min/in)
_ � 14
�—
REMARKS:
SOIL PERCOLATION RATE DETERMINED BY AVERAGING
LAST4 READINGS OF TEST HOLES 2 & 3.
LOCA710N OF TEST HOLES: SEE FIGURE
1 �
��
H LOT 10, FILING 3, THE DIVIDE AT CORDILLERA
407 0028 C=-�P[P't@CI�I PERCOLATION TEST RESULTS FIGURE 3
HEPWORTH-PAWLAK GEOTECHNICAL
G:yIOBS�En8n�5`��Tw]DJ26�,w1IX28 Fa. PFACS.drg
4 INCH DIA. SOUD PVC
MANIFOLD PIPES SLOPED
AT2% MIN. TO DRAIN TO
ABSORPTION BED
4 INCH DIA. PVC AIR VENT
INSTALLED VERTICALLY IN KNOCK
OUT PROVIDED IN INFILTRATOR
CHAMBER ATALL FOUR CORNERS
MIN. 8 INCHES ABOVE GROUND
SURFACE. INSTALL REMOVE48LE
TOP CAPS ON ALL VENTS.
INFILTRATOR END PLATE 16° --I
4 INCH DIA. SOUD
PVC MANIFOLD PIPE
INSTALLED LEVEL.
I o I I
APPROX.12'
4 INCH DIA. SOLID PVC TRANSPORT
PIPE FROM DISTRIBUTION BOX
SLOPED AT 2 % MIN TO DRAIN TO
ABSORPTION BED
n
NOTES: 1. All piping materials and installation methods shall meet current Eagle Couty Land Use Regulations for
Individual Sewage Disposal Systems.
NOT TO SCALE
407 0028
LOT 10, FILING 3, THE DIVIDE AT CORDILLERA I FIGURE 5
TYPICAL ABSORPTION AREA PLAN VIEW
c:Woes\Ene'n�u,pt2ooneo]o028,ao1o�rs.avNeq
INFILTRATOR QUICK 4
STANDARD CHAMBER
NOT TO SCALE
GRADE BACKFILL TO DEFLECT
SURFACE WATER RUN ON AT
3H:IV MAXIMUM SLOPE
APPROX. 1' MIN. AND 2'
MAX. COVER SOIL OVER
INFILTRATOR CHAMBERS
BOTTOM OF EXCAVATION SHALL BE
� LEVEL AND BOTTOM AND SIDES OF
EXCAVATION SHALL BE SCARIFIED
UNDISTURBED NATIVE SOIL
APPROX. 3' MAX. CUT
AT UPHILL SIDE OF
ABSORPTION BED
1
4070028 Ge rtech I LOT 10, FILING 3, THE DIVIDE AT CORDILLERA
HEPWORTH-PAWLAKGEOTECHNICAL TYPICAL ABSORPTION AREA CROSS SECTION FIGURE 6
G ���` iEnOs<mn�f2 W TSO]0028,S0I0028 F6 � CAOSSdng
