HomeMy WebLinkAboutApplication- PermitfairAa
GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT
108 Eighth Street, Suite 201
Glenwood Springs, Coloradof 81601
Phone (970) 945-8212
INDIVIDUAL SEWAGE DISPOSAL PERMIT
PROPERTY
Owner's Name
System Location
Permit1 g
Assessor's Parcel No.
This does not constitute
a building or use permit.
Present AddressarS i4 1 � T / �
y hone 7 7 7- 9571
OE ._3/ ,P .
Legal Description of Assessor's Parcel No
c2/77 -a1/459/-040 f4i6a
SYSTEM DESIGN
Septic Tank Capacity (gallon) Other
Percolation Rate (minutes/inch) Number of Bedrooms (or other)
Required Absorption Area - See Attached
Special Setback Requirements:
Date Inspector
FINAL SYSTEM INSPECTION AND APPROVAL (as installed)
Call for Inspection (24 hours notice) Before Covering Installation
System Installer
Septic Tank Capacity
Septic Tank Manufacturer or Trade Name
Septic Tank Access within 8" of surface
Absorption Area
Absorption Area Type and/or Manufacturer or Trade Name
Adequate compliance with County and State regulations/requirements
Other
L7
Date �1- "/- O �� Inspector [ iyGM1'iGt�7i-2Y2— i 1C<, Lir 5 'i C fold
RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE -Al 4-.'< e-- `—"
•CONDITIONS:
1. All installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapter
25. Article 10 C.R.S. 1973, Revised 1984.
2. This permit is valid only for connection to structures which have fully complied with County zoning and building requirements. Con-
nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automatically be a violation or a
requirement of the permit and cause for both legal action and revocation of the permit.
3. Any person who constructs. alters, or installs an individual sewage disposal system in a manner which involves a knowing and material
variation from the terms or specifications contained In the application of permit commits a Class I, Petty Offense ($500.00 fine — 6
months in jail or both).
Wk4e •DDI Ir4\T vdW nrn•nTs.•-. rT
INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION
)WNER ,V/9 , 4F_.,irs
LDDRESS f 14'WV G fey/ C !'/s PHONE 930.99-2 Rs7"
:ONTRACTOR Ow,,J� 2,
,DDRESS
PHONE
ERM1T REQUEST FOR VI_ NEW INSTALLATION ( ) ALTERATION ( ) REPAIR
.ttach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable
'Aiding, location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4).
OCATION OF PROPOSED FACILITY:
rear what City of Town Z#2j e Size of Lot atm:et:-
egg Descaiption or Address 399 Ra-rf-A Z2z)
TASTES TYPE: ( ) DWELLING ( ) TRANSIENT USE
($COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES
( ) OTHER—DESCRIBE
UILDING OR SERVICE TYPE: .4010nt_
umber of Bedrooms - ,14/a— Number of Persons l
Garbage Grit ( ) Automatic Washer . ( ) Dishwasher
)URGE AND TYPE OF WATER SUPPLY: qQ WELL ( ) SPRING () STREAM OR CREEK
'supplied by Community Water, give name of supplier.
ISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: /
)as an effort made to connect to the Community System?
site plan is required to be submitted that indicates the following MINIMUM distances:
each Field to Well: 100 feet
optic Tank to Well: 50 feet
each Field to Irrigation Ditches, Stream or Water Course: 50 feet
optic System (septic tank & disposal field) to Property Lines: 10 feet
OUR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE ISSUED WITHOUT
SITE PLAN.
ROUND CONDTITONS:
epth to first Ground Water Table ISD t rT
scent Ground Slope Gf sit 7r141,r/ /e 2
(PE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED:
Q
)
)
)
SEPTIC TANK
VAULT PRIVY
PIT PRIVY
( ) AERATION PLANT
( ) COMPOSTING TOILET
( ) INCINERATION TOILET
VAULT
RECYCLING, POTABLE USE
RECYCLING, OTHER USE
CHEMICAL TOILET( ) OTHER -DESCRIBE
NAL DISPOSAL BY:
ABSORPTION TRENCH, BED OR NT ( ) EVAPOTRANSPIRATION
UNDERGROUND DISPERSAL ( ) SAND FILTER
ABOVE GROUND DLSPERSAL ( ) WASTEWATER POND
OTHER -DESCRIBE
TILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? ..,W
ERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the
ercolation Test)
Minutes 9' per inch in hole No. 1 Minutes 3S- per inch in hole No. 3
Minutes / / per inch in hole No. 2 Minutes per inch in hole No. _
ame, address and telephone of RPE who made soil absorption tests: £ te.I/,r c,aca r.ernn
ame, address and telephone of RPE responsible for design of the system: .ion ,Caase,c
//J-9 .24' Z.4.b G'�rov0 ->✓ e -no,.., /t 9ot 2s S as -77
.pplicant adrnowledges that the completeness of the application is conditional upon such further mandatory and
dditional tests and reports as may be required by the local health department to be made and furnished by tbe applicant
r by the local health department for purposed of the evaluation of the application; and the issuance of the permit is
object to such tams and conditions as deemed necessary to insure compliance with rules and regulations made,
ifotmation and reports submitted herewith and required to be submitted by the applicant are or will be represented to
e true and correct to the best of my knowledge and belief and are designed to be relied on by the local department of
ealth in evaluating the same for purposes of issuing the permit applied for herein I further rmdastand that any
ilsification or misrepresentation may result in the denial of the application or revocation of any permit granted based
pon said application and in legal action for perjury as provided by law.
signed t") _ec i _ _�is Date Gly 64 �a�l�
'LEASE4ItAW AN ACCURATE MAP TO YOUR PROPERTY!!
t
CRONK
CONSTRUCTION •
INCORPORATED
1129 -24- Road
Grand Junction, CO 81505
970-245-0577, 970-257-7453 (fax)
November 4, 2004
CERTIFICATE OF INSPECTION AND ACCEPTANCE
Individual Sewage Disposal System
Brandt Varco Project
1936 County Road 319
Rifle, CO 81650
The individual sewage disposal system of reference was inspected on November 4, 2004. The
system was found to conform with the plans and specifications set forth in the engineered sewage
disposal system design for the aforementioned property prepared on August 31, 2004. Copies of the
engineered plan are on file at the Garfield County Building Department or may be obtained from the
undersigned design engineer.
Thomas A. Cronk, P.E.
1129 -24- Road
Grand Junction, CO 81505
970-245-0577
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CRONK
CONSTRUCTION
INCORPORATED
1129 -24- Road
• Grand Junction, CO 81505
970-245-0577, 970-257-7453 (fax)
INDIVIDUAL SEWAGE DISPOSAL SYSTEM DESIGN
Date: August 31, 2004
Prepared by: Thomas A. Croak, P.E.
Cronk Construction Inc.
1129 -24- Road
Grand Junction, CO 81505
245-0577
Type of Design: Commercial
Owner:
Brandt Varco Building c/o 319 Properties, LLC
1936 County Road 319 45705 Highway 6&24
Rifle, CO 81650 Glenwood Springs, CO 81601
970-947-9511
Property address: 1936 County Road 319, Rifle, CO 81650
Tax schedule No.:
Page 1 of 8
1.0 Site History
The site consists of approximately 2.2 acres of uncultivated native soil to be split from a larger parcel.
Drainage is approximately 2% to the north. A percolation test/soils evaluation was conducted on the
property of reference on 08/20/04 by Tom A. Cronk, registered professional engineer (R.P.E.). The perc
excavation trench (excavation A) was located approximately 55' northeast of the proposed building.
Additional perc holes were located 40' east of the trench (excavation B) and 30' west of the trench
(excavation C).
The perc test was intended to provide subsurface design parameters for design of an individual sewage
disposal system (ISDS) for commercial use. As based on results from this subsurface investigation, the
following ISDS design has been prepared. Results from the 08/20/04 perc test/soils evaluation are
attached for reference as Appendix A.
2.0 Development of Design Parameters
Aperc excavation trench (excavation A) was extended to a depth of 120" below ground surface (BGS).
There was no evidence of ground water or high seasonal water table in the open excavation to a depth of
120" BGS. The soils evaluation indicates two distinct soil horizons underlie the site. A lithological
description follows:
depth (in.) description
0" - 24" silty clay/sandy clay, tan; layered structure; soft and friable
24" - 120" silty clay, tan to Tight brown; layered; loose and friable
As based on the perc test results (Appendix A), a weighted design perc rate of 40 min/in. is chosen for
overall system sizing for subsurface discharge below a depth of 24".
Page 2 of 8
3.0 System Design
A INFILTRATOR absorption trench is proposed for discharge of septic effluent at the site. Construction of
the system will consist of excavating level trenches in the area comprising the absorption field. The initial
excavation shall be continued to a minimum depth of 36" (see absorption field cross-section).
Following completion of the initial push -out, INFILTRATORS will be used to construct a septic effluent
distribution system in the open excavations. The INFILTRATOR effluent distribution system will be
installed in accordance with the "Infiltrator Technical Manual", available from Infiltrator Systems Inc., 123
Elm Street, Suite 12, Old Saybrook, Connecticut 06475. Adjacent INFILTRATORS shall be fastened with
a minimum of four (4) 3/4" x 48 self -tapping sheet metal or bright brass deck screws to prevent movement
and separation during backfilling. As shown in the Construction Detail, the bottom of the INFILTRATOR
seepage trenches will be located a minimum of 36" below ground level.
After the INFILTRATORS are installed, the absorption field will be covered with a soil cap. The soil cap
will consist of approximately 24" (10" minimum required) of native soil mounded 5% to promote surface
run off away from the absorption field.
The installer should confirm the feasibility of gravity discharge of sewage effluent from the structure to the
absorption field by field verification of assumed design parameters. Assumed design parameters with
respect to gravity discharge include:
• distance from exit of sewage pipe at foundation line to absorption field - 60' or less,
• elevation of ground surface at entry to absorption field must be no more than 12" above
the invert elevation of sewage pipe at exit from foundation line.
If field measurements do not confirm these design assumptions, gravity discharge of septic effluent from
the proposed structure can not be assured and a lift station may be required. Please contact the design
engineer to address any design modifications necessary if these design assumptions are not upheld.
The installer must also confirm the setbacks from property lines, building envelopes, and existing
easements shown in the attached graphics are maintained. Additionally, any unknown utility lines,
easements, or other adverse conditions disclosed during construction must maintain the required setbacks
listed on page 5 of this document.
Sewage loading for the ISDS will include lavatory, water closet, and shower service for 30 employees and
customers associated with a 1,500 sq. ft. office area and 7,500 sq. ft. shop. The ISDS load sizing is based
on the maximum number of occupants for the structure as determined from the IBC building code.
Average daily sewage loadings are calculated as follows:
Sewage Source Design Loading
Average Daily Sewage Flow
shop occupants @ 500 sq.ft./occupant 15 employees @ 20 gal/employee-8 hrshift
office occupants @ 100 sq.ft./occupant 15 employees @ 15 gal/employee-8 hr. shift
Total Average Daily Sewage Flow
300 gal/day
225 gal/day
Page 3 of 8
525 gal/day
A 1,000 gallon septic tank is required for retention of septic effluent for the proposed sewage loading. A
non -corrodible Orenco filter (model # FTW0444-36A) shall be installed at the final outlet Tee of the septic
tank or in the effluent line between the septic tank and the absorption field to limit the size of solids and
sludge passing into the absorption fields. The filter must be accessible for cleaning and replacement from
the ground surface.
A distribution box is required to provide equal distribution of septic effluent from the septic tank to the
absorption field. The distribution box must be placed on stable native soil or compacted structural fill to
prevent settling and assure equal distribution of septic effluent.
As discussed above, INFILTRATOR absorption trenches are proposed to discharge septic effluent to the
underlying sub -soils. As shown in the attached graphics, the absorption trenches will consist of three (3)
trenches 3' wide x 3' min. deep x 68.75' long with eleven (1 I) standard INFILTRATOR units each for a
total of thirty three (33) INFILTRATORS The absorption field will encompass a gross area of 618.75
square feet with an effective area (31 sq. ft. allowed area/INFILTRATOR) of 1,023 sq. ft.
Calculations and design parameters used to size the absorption field follow.
DESIGN CALCULATIONS
DESIGN SEWAGE LOADING OF 525 GALWAY AVERAGE FLOW
PEAK FLOW = 150% OF AVERAGE = 787.50 GAL.IDAY
DESIGN PERCOLATION RATE = 40.0 MIN.IINCH
A = Q f WHERE,
A = ABSORPTION FIELD AREA
Q = PEAK FLOW
t = PERC TIMEIINCH
A = 785.50 40.0 = 996.12 SQUARE FEET
SIZE ADJUSTMENT FACTOR OF 0.5 FOR INFILTRATOR TRENCH SYSTEM
ADJUSTED AREA = 996.12 X 0.5 = 498.06 SQUARE FEET
USE 33 STANDARD (11-10) INFILTRATORS @ 15.50 SQ. FT. EACH
FOR TOTAL ABSORPTIVE AREA OF 33 X 15.50 = 511.50 SQ. FT.
ABSORPTION FIELD SIZED AT THREE (3) TRENCHES 3 FT. x 68.75 FT. = 618.75 SQ. FT.
Page 4 of 8
4.0 Site Specific Installation/Operation Requirements
The owner and system contractor shall be aware and comply with the following installation and system
operation requirements.
4.1 Installation - Setbacks, Notifications, and Inspections
• All installation activities shall be conducted in accordance with current Colorado
Department of Health ISDS Regulations as well as any relevant Garfield County
regulations and requirements. If at anv time during construction, subsurface site
conditions are encountered which differ from the design parameters developed in Section
2.0, construction activities will stop and the design engineer will be contacted to address
any necessary design modifications.
• Installation procedures including grade, location, setbacks, septic tank size, and absorption
field size shall conform with the attached graphic details. Construction activities and
system components will not encroach upon existing easements or utility corridors. A
minimum of 6 ft of undisturbed soil shall be maintained between individual absorption
elements and the septic tank and/or adjacent absorption elements. Minimum site specific
setbacks for system components are:
Source Septic Tank Absorption Field Building Sewer
water line 10' 25' 10'
domestic well 50' 100' 50'
occupied bldng 5' 20'
property lines 10' 10'
subsoil drains 10' 25'
irrigation ditch
open 50' 50'
lined/gated 25 25'
solid pipe 10' 10'
• To avoid surface flow infiltration and saturation of the new absorption system,
abandonment of irrigation in the vicinity of the disposal system is required. Diversion
ditches necessary to divert surface flows around the new absorption bed must maintain the
minimum setbacks listed above.
• All sewer lines and effluent distribution piping shall be 4 inches in diameter and have glued
joints. INFILTRATORS shall be placed level in the absorption field. All lines discharging
sewage from the residence to the septic tank shall maintain fall of between 1/8 in. and 1/4
in. per foot and shall employ sweep 90's or 2-45's at all turns. Sewer lines from the
dwelling to the septic tank and at least 6 ft from the septic tank outlet must meet minimum
standard ASTM -3034. Sewer lines under driveways shall always meet minimum Schedule
40 PVC standards and shall be encased with corrugated metal pipe when covered with less
than 24" of soil.
Page 5 of 8
• The installer shall not place fill in the open excavation until inspected and approved by the
design engineer. Additionally, the final cover shall not be placed on sewer lines, septic
tank, or the absorption area until the system has been inspected and approved by the design
engineer. Provide 48 hour notice for all required inspections.
• Four inch dean outs shall be provided at maximum 100' intervals in all effluent lines
exceeding 100' in length.
• A non -corrodible Orenco filter (model k FTW0444-36A) shall be installed at the final
outlet Tee of the septic tank or in the effluent line between the septic tank and the
absorption field to limit the size of solids and sludge passing into the absorption field. The
filter must be accessible for cleaning and replacement from the ground surface.
• The distribution box shall be set level on undisturbed native soil or a structural pad (e.g.,
compacted fill or concrete) to prevent settling and promote uniform distribution of flow to
the absorption field. A 45 degree bend shall be turned down on the septic influent line to
damp surge flows from the septic tank and promote equal distribution.
• The effluent distribution system shall be constructed in accordance with the "Infiltrator
Technical Manual" available from Infiltrator Systems Inc., 123 Elm Street, Suite 12, Old
Saybrook, Connecticut 06475.
• The surface cap shall consist of native soil mounded 5% over the absorption field to
promote surface runoff.
• The system contractor shall be aware of the potential for construction activities to reduce
soil permeabilities at the site through compaction, smearing, and shearing. The following
precautions and construction procedures should be employed during installation to
minimize disturbance to native soils:
i. Excavation should proceed only when the moisture content of the soil is below the
plastic limit. If a sample of soil forms a rope instead of crumbling when rolled
between the hands it is too wet and should be allowed to dry before excavation
continues.
ii. Excavation and backfill equipment should work from the surface where at all
practical to avoid compaction of the soils at depth.
iii. The bottom and sidewalls of the excavation should be left with a rough, open
surface. The appearance should be that of broken or ripped soil as opposed to a
sheared, smeared, or troweled surface. Any smoothed or smeared surfaces should
be removed with a toothed rake or shallow ripper taking care to remove loose
residues from the bottom of the trench by hand if necessary.
iv. Care should be taken in placing fill materials in the excavation to avoid damaging
the exposed soil surfaces.
Page 6 of 8
4.2 Operation - Maintenance and Inspections
• The owner shall install a structural barrier if necessary and take precautions to prevent
vehicular traffic, excessive surface watering, accidental flooding, or other activities in the
vicinity of the absorption field which may compact, saturate, or otherwise alter the
subsurface soil parameters used in designing the septic system.
• The owner will plant and maintain grass or other shallow rooted cover crop to prevent
erosion and promote evapotranspiration over the absorption field.
• The owner will inspect and maintain the required mounding and drainage away from the
absorption field to prevent saturation from precipitation and surface flows.
• To mitigate the generation of preferential flow channels which may compromise the
operation of the system, the owner will inspect and prevent intrusion of burrowing animals
and deep rooted plants into the absorption field.
• The septic effluent filter shall be inspected and cleaned as necessary every six (6) months.
• The owner will conduct periodic maintenance of the septic system by removing
accumulated sludge from the septic tank every 3-4 years to prevent clogging of the
absorption field.
Page 7 of 8
5.0 Limitations
This report is a site specific design for installation of an individual sewage disposal system and is
applicable only for the client for whom our work was performed. Use of this report under other
circumstances is not an appropriate application of this document. This report is a product of Cronk
Construction Incorporated and is to be taken in its entirety. Excerpts from this report may be taken out of
context and may not convey the true intent of the report. It is the owner's and owner's agents responsibility
to read this report and become familiar with the recommendations and design guidelines contained herein.
The recommendations and design guidelines outlined in this report are based on: 1) the proposed site
development and plot plan as furnished to Cronk Construction Incorporated by the client, and 2) the site
conditions disclosed at the specific time of the site investigation of reference. Cronk Construction
Incorporated assumes no liability for the accuracy or completeness of information furnished by the client.
Site conditions are subject to external environmental effects and may change over time. Use of this plan
under different site conditions is inappropriate. If it becomes apparent that current site conditions vary
from those anticipated, the design engineer should be contacted to develop any required design
modifications. Cronk Construction Incorporated is not responsible and accepts no liability for any
variation in assumed design parameters.
Cronk Construction Incorporated represents this report has been prepared within the limits prescribed by
the owner and in accordance with the current accepted practice of the civil engineering profession in the
area. No warranty or representation either expressed or implied is included or intended in this report or in
any of our contracts.
Thomas A. Cronk, P.E
Date i\._cy-ra
NOTE: This individual sewage disposal plan is meant to include the following four pages of graphics
including: 1) plot plan, 2) septic layout plan, 3) absorption field plan view, and 4) absorption field
cross section. The plan is not to be implemented in the absence of these related graphics. In addition,
results from the percolation test and soils evaluation are included for reference as Appendix A.
Page 8 of 8
SO1'38,09,E. 310 93,
BRANDT VARCO BUILDING
1936 COUNTY ROAD 319, RIFLE, CO
PLOT PLAN
AUGUST 25, 2004
SCALE I'=50' NORTH
1
1
NOTE
THE FOLLOWING SETBACKS MUST BE MAINTAINED:
SEPTIC ABSORPTION
TANK FIELD
SPRINGS/WELLS 50' 100'
LAKE/ STREAM/ IRRIG DITCH 50' 50'
GATED PIPE/INT. IRRIG DITCH- 10' 25'
DOMESTIC WATER LINE 10' 25'
N
225 acres
pert test \
excavo tions
NOTE
GRAVITY DISCHARGE OF SEWAGE
EFFLUENT FROM THE RESIDENCE
TO THE DISPOSAL SYSTEM IS
BASED ON THE FOLLOWING DESIGN
ASSUMPTIONS:
LENGTH OF SEWAGE PIPING
FROM EXIT AT FOUNDATION
LINE TO ENTRY TO ABSORPTION
FIELD = 60' OR LESS
ELEVATION OF GROUND SURFACE
AT ENTRY TO ABSORPTION FIELD
=N0 MORE THAN 12' ABOVE INVERT
ELEVATION OF SEWAGE PIPE AT
EXIT FROM FOUNDATION LINE
DISCLAIMER
IF THESE DESIGN ASSUMPTIONS ARE
NOT UPHELD DURING CONSTRUCTION,
GRAVITY DISCHARGE CAN NOT BE
ASSURED AND A LIFT STATION MAY
BE REQUIRED
repair \
area
n', 0,se
4.16 c'••
•
•
Se
•
•O
shared drive
parking
S81'38'09 -
NOTE
CALL 1-800-922-1987 FOR UTILITY
LOCATES BEFORE EXCAVATING
absorption Field consisting of
3 rows of 11 standard In filtro tors
for o total of 33 units (36'x75' ea)
distribution
box
10D0 gallon septic tank w/
discharge baffle nodiFied to
a cconnodate effluent Filter
(DSI Model FTW0444-36A)
parking
BRANDT VARCO BUILDING
1936 COUNTY ROAD 319, RIFLE. CO
SEPTIC LAYOUT PLAN
AUGUST 25, 2004
SCALE: 1'=50'
NORTH
distribution box
septic influent
G875'.typ
33 standard Infiltrator units
configured as 3 rows of 11 units it
each row
EMraWAMEMEN
ElllafldWA=M1111= =EN
75'.typ.
1J
6 min
provide inspection/venting ports
at each end of Infiltrator
trenches as shown
ABSORPTION FIELD - PLAN VIEW
SCALE! 1'=20'
BRANDT VARCO BUILDING
1936 CR 319. RIFLE. CO
ABSORPTION FIELD - PLAN VIEW
AUGUST 25, 2004
SCALE. I'=20'
l
PROVIDE VENTING/INSPECTION
PORTS AS REQUIRED BY
INFILTRATOR INSTALLATION
GUIDELINES, TYP. EACH
ROW (ONE OF THREE)
SOIL CAP (MOUND 5%)
3/1 MAXIMUM
SLOPE, TYP.
EXISTING GROUND SURFACE
24' APPROX
❑0'M]N 1
DISK OR SCARIFY UNDER
INFILTRATOR, TYP.
72' MIN.TYP
-a-
36' -gm
INFILTRATOR, INSTALL IN ACCORDANCE
WITH 'INFILTRATOR TECHNICAL MANUAL.
INFILTRATOR SYSTEMS INC„ 123 ELM
STREET, SUITE 12, OLD SAYBROOK,
CONNECTICUT 06475
OUTLETS AS REQUIRED
4' 45 -BEND SURGE
FLOW SUPPRESSOR,
INLET
.11.=.11.=JI=L=1I=1L-JL=JL=
n -u loir—n_
COMPACTED NATIVE SOIL OR STRUCTURAL
FILL TO PREVENT SETTLING 11
n
DISTRIBUTION BOX DETAIL
SCALE' I'=1'
ABSORPTION FIELD - CROSS SECTION
SCALE, 1'=5'
-24'
-120'
SOILS LOG
(SEE NOTES)
SOILS LUG NOTES
H1 - SILTY CLAY/SANDY CLAY, TAN, LAYERED
STRUCTURE, SOFT & FRIABLE
t12 - SILTY CLAY, TAN TO LT BROWN; LAYERED,
LOOSE 6 FRIABLE
NO GROUNDWATER OR HIGH SEASONAL WATER
TABLE TO 120' DOS
BRANDT VARCO BUILDING
1936 CR 319, RIFLE, CO
ABSORPTION FIELD - CROSS SECTION
AUGUST 25. 2004
SCALE AS SHOWN
APPENDIX A
SOILS AND PERCOLATION REPORT
CRONK CONSTRUCTION INCORPORATED
CRONK
CONSTRUCTION
INCORPORATED
1129 -24- Road
• Grand Junction, CO 81505
970.245.0577, 970.257.7453 (fax)
SOILS AND PERCOLATION REPORT
Date: August 20, 2004
Prepared by:
Client:
Thomas A. Cronk, P.E.
1129 -24- Road
Grand Junction, CO 81505
245-0577
319 Properties, LLC
45705 Highway 6&24
Glenwood Springs, CO 81601
(970) 947-9511
Property address: Brandt Varco Building, 1936 County Road 319, Rifle, CO 81650
Tax schedule No.:
Legal Descript.:
1.0 Soils Evaluation
The site consists of approximately 2.2 acres of uncultivated native soil to be split from a larger parcel.
Drainage is approximately 2% to the north. A percolation test/soils evaluation was conducted on the property
of reference on 08/20/04 by Tom A. Cronk, registered professional engineer (R.P.E.). The perc excavation
trench (excavation A) was located approximately 55' northeast of the proposed building. Additional perc holes
were located 40' east of the trench (excavation B) and 30' west of the trench (excavation C).
A perc excavation trench (excavation A) was extended to a depth of 120" below ground surface (BGS). There
was no evidence of ground water or high seasonal water table in the open excavation to a depth of 120" BGS.
The soils evaluation indicates two distinct soil horizons underlie the site. A Iithological description follows:
depth (in.) description
0" - 24" silty clay/sandy clay, tan; layered structure; soft and friable
24" - 120" silty clay, tan to light brown; layered; loose and friable
Pere holes were constructed in excavation A at depths of 36 in., 66 in., and 96 in. Additional perc holes were
constructed in excavation B at a depth of 42 in. and in excavation C at a depth of 36 in. The holes appeared
to be well saturated at the time of the test. Results of the percolation test are shown in Table 1.
Page A-1 of A-3
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TABLE 1
Percolation Test Results
Brandt Varco Building- 1936 CR 319, Rifle
Depth
Time on 08/20/04
Time
Perc
Rate
min/in
11:25
12:12
12:40
Drop
(A) 36" - 48"
4.75
6.75
7.375
75/2.625
29
(A) 66" - 78"
6.0
7.625
8.0
75/2.0
38
(A)96"-108"
5.5
6.5
615
75/1.25
60
(B) 42" - 54"
7.75
12.0
dry
47/4.25
11
(C)36"-48"
6.625
8.25
8.75
75/2.125
35
2.0 Conclusions and Recommendations
Soils at the site appear acceptable for implementation of an individual sewage disposal system (ISDS). The
following site-specific considerations should be observed during implementation of the ISDS:
• The bottom of the ISDS absorption field should be located as shallow as practical to maintain
4' of usable infiltration soil above the extent of the soils observation excavation located at
120" BGS and also promote evapotranspiration. A weighted design perc rate of 40 min/in.
is recommended for overall system sizing.
• Care should be taken during construction to avoid compaction and smearing of the exposed
infiltrative surfaces and preserve the natural permeability of the native soils.
Page A-2 of A-3
3.0 Limitations
This report provides a professional assessment of the feasibility of implementing an individual sewage disposal
system on the property of reference. The design parameters developed in this document are representative of
the site conditions disclosed at the specific time of the site investigation. Site conditions are subject to change
from external events both manmade (irrigation or pond construction) and naturally occurring (flooding or
excessive precipitation). Cronk Construction Incorporated is not responsible and accepts no liability for any
variation in assumed design parameters caused by external events.
Cronk Construction Incorporated represents this report has been prepared within the limits prescribed by the
owner and in accordance with the current accepted practice of the civil engineering profession in the area. No
warranty or representation either expressed or implied is included or intended in this report or in any of our
contracts.
SEAL
Page A-3 of A-3
Thomas A. Cronk, P.E.
Date