HomeMy WebLinkAboutAs-built OWTS Design Report 05.03.2018H-PKUMAR
Geotechnical Engineering Engineering Geology
Materials Testing { Environmental
5020 County Road 154
Glenwood Springs, Colorado 81601
Phone: (970) 945-7988
Fax: (970) 945-8454
Email: hpkglenwood@kumarusa.com
Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado
May 3, 2018
Eggers Architecture, Inc.
Attn: Don Eggers
P.O. Box 798
Kremmling, Colorado 80459
don.eggers@ eggei4architectom.com
Project No. 17-7-263.03
Subject: As -Built Evaluation of Onsite Wastewater Treatment System, Proposed Barn
Residence, Big Mountain Ranch, 2147 Ute Stock Drive, North of Rifle, Garfield
County, Colorado
Dear Mr. Eggers:
As requested, we observed the installation of the onsite wastewater treatment system (OWTS)
installation at the at the subject site as required by the Garfield County Environmental Health
Department. Our observations and recommendations for the As -Built evaluation are presented in
this report. The services are supplemental to our agreement for professional services to Eggers
Architecture, Inc. dated March 28, 2017.
H-P/Kumar previously designed the OWTS for the proposed residence submitting our
recommendations in a report dated October 16, 2017, Project No. 17-7-263.03. The system was
designed for three bedrooms. The OWTS was installed by Western Colorado Excavating, Inc.
We performed our As -Built evaluation on November 1, 2017 and April 20, 2018. On November
1, 2017, the OWTS components observed included: sewer line, cleanout, septic tank, effluent
pump, effluent transport line, soil treatment area (STA) and the locations of these components.
The installation and locations of the system components were verified as shown on Figure 1.
Photographs of the OWTS installation are provided in the attached Photograph Log. Power and
water were not yet supplied to the OWTS at the time of our inspections. We returned to the site
on April 20,2018 after power and water had been supplied to the pump, so a pump performance
test could be performed. After some field adjustments, the pump was observed to be functioning
properly.
It is our opinion that the OWTS was installed in general conformance with the above referenced
design.
H-P� KUMAR
Project No. 17-7-263.03
Don Eggers
May 3, 2018
Page 2
The observations and recommendations presented above are based on our site observations and
our experience in the area. We make no warranty either express or implied. Alterations to the
system or improper backfill and site grading could affect the operation and effectiveness of the
OWTS.
Please feel free to contact us if you have any questions regarding this letter.
Respectfully,
64,,,,21,PirJ
Shane M. Mello, Staff Engineer
Reviewed By:
a 2 ,_
David A. Young, P. $4
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Attachments: Figure 1 — As -Built Site Plan
OWTS As -Built Photograph Log
cc: Giard Homes — Roger Giard (roger.giard@giardhotnes.coni)
H P KU MAR
Project No. 17-7-263.03
PROFILE
PIT 1
PROPOSED MOUNDED SOIL
TREATMENT AREA WITH AN
AGGREGATE BED THAT I5
10 FEET WIDE BY 45 FEET
LONG AND A SAND BASAL (5)
AREA THAT IS 34 FEET
WIDE BY 45 FEET LONG CA
CP
C5)
CP
CXRCP
�>
Q
00 OLE NOUT
BORING 1
01 4
CP
PROPOSED 1,500 GALLON,
THREE CHAMBER VALLEY
PRECAST SEPTIC TANK
WITH AN ORENCO PF3005
EFFLUENT PUMP INSTALLED
IN THE OUTLET CHAMBER
PROPOSED
3 -BEDROOM
BARN
2147 UTE
STOCK DRIVE
TEST
BORING 2
ti
LEGEND
❑ PROFILE PIT FOR
CURRENT STUDY
0 EXPLORATORY BORING FOR
JUNE 5, 2017 SUBSOIL STUDY
1
APPfOXJMATE SCALE
1 I CH 20 FEET
10. BAN SI AR FL.
T. iWT. "LAB EL.=:
17-7-263.03
H-PMWMAR BIG MOUNTAIN RANCH RESIDENCE
AS -BUILT SITE PLAN
Fig. 1
OWTS AS -BUILT PHOTOGRAPH LOG
PROPOSED SINGLE FAMILY RESIDENCE
2147 UTE STOCK DRIVE, GARFIELD COUNTY, COLORADO
Photograph 1: Sewer line
exiting residence with cleanout.
Photograph 2: Three chamber,
1,500 gallon Valley Precast
septic tank with risers and
effluent line.
Project No. 17-7-263.03
OWTS AS -BUILT PHOTOGRAPH LOG
PROPOSED SINGLE FAMILY RESIDENCE
2147 UTE STOCK DRIVE, GARFIELD COUNTY, COLORADO
Photograph 3: STA with
aggregate bed, manifolds,
laterals, Orenco orifice shields,
inspection ports and cleanouts.
Project No. 17-7-263.03