HomeMy WebLinkAboutEngineer's Report 12.23.14kpm.rilllak Cieorrduue,ti,
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HEPWORTH-PAWLAK GEOTECHNICAL Fax: 970-06•5891
tm,il hpgeu4+ lineotecli.com
December 23, 2014
Chris Olson
310 White Horse Drive
New Castle, Colorado 81647
ciolsen50@gmail.com
Job No. 113 161B
Subject: As -Built Evaluation of Onsite Wastewater Treatment System, Proposed
Residence, County Road 335, Lot 2, Sillivan Subdivision, Garfield
County, Colorado.
Dear Mr. Olson
Hepworth-Pawlak Geotechnical, Inc. (HP Geotech) observed the installation of the Onsite
Wastewater Treatment System (OWTS) for the proposed residence at the subject
property. The OWTS components observed include: sewer pipe, cleanout, septic and
dose tanks, pump operation, effluent transport pipe, automatic distribution valve,
Infiltrator chambers, inspection ports and the locations of components. We previously
designed an OWTS for the subject site and presented our recommendations in a report
dated April 11, 2014, Job No. 113 161B. Our observations and recommendations are
presented in the following paragraphs.
We performed our As -Built site evaluation on October 28th and December 18th, 2014.
The installation and Iocations of system components were verified as shown on Figure 1.
The tank and field locations and orientation were modified slightly from our design as
shown on Figure 1; however, this will not alter the effectiveness of the OWTS.
Photographs of the OWTS installation are provided in the attached Photograph Log.
1t is our opinion that the OWTS was installed in general conformance with our April 11,
2014 design. 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.
Glenwood Springs 970-945-7988 • Parker 303-8C-7119 • Colorado Springs 719-633-5562
Chris Olson
December 23, 2014
Page 2
Please feel free to contact us if you have any questions regarding this letter.
Sincerely,
HEPWORTH - PAWLAK GEOTECHNICAL, INC.
Jason A. Deem
Project Geologist
Reviewed by:
Chad M. Bringle, P.E.
Project Engineer
Attachments: Figure 1 — OWTS As -Built Plan
OWTS As -Built Photograph Log (3 pages)
cc: Dave A. Young, P.E.
Job No 1 13 16I B — —
/
ARES
•
ik \- ORENCO PF1005 EFFLUENT
\ .-- PUMP INSTALLED IN A
/I( BIOTUBE PUMP VAULT
/ \‘ /
•
•
•
•
•
SOIL TREATMENT AREA `.
--- CONSISTING OF THREE ROWS = `.
— - OF 14 INFILTRATOR QUICK 4 ....�
PLUS STANDARD CHAMBERS = v
i . IN EACH TRENCH
/
\
INFILTRATOR SYSTEMS IM
SERIES 540 GALLON DOSE
TANK EQUIPPED WITH AN
/
•
•
•
•
•
CLEANOUT
•
INFILTRATOR SYSTEMS TWO
CHAMBER iM SERIES 1,060
GALLON SEPTIC TANK
i // -t
sT
EASE�s
E1 IS
WITNESS CORNER
0=18' 1hI'19
i{— /UO.00
L-2283'
C9—N 30' 20'30- E
CH -791.89'
T ('
P.0.I
Legend:
Profile Pit
® Percolation Test Hole
113 161B
Gtech
HEPWORTH-PAWLAK GEOTECHNICAL
LOT 2, SILLIVAN SUBDIVISION
OWTS AS -BUILT SITE PLAN
FIGURE 1
OWTS As -Built Photograph Log
Lot 2, Sillivan Subdivision
Photograph showing sewer line, cleanout and connection to the Infiltrator IM 1060 septic tank.
Photograph of septic and dose tanks looking southwest. Dose tank seen near excavator was
damaged and replaced.
Job No, 113 161 B
OWTS As -Built Photograph Log
Lot 2, Sillivan Subdivision
Photograph showing automatic distributing valve enclosure and connections to the individual
trenches.
Photograph view of the Orenco V6403 automatic distributing valve assembly.
Job No 113 16IB
OWTS As -Built Photograph Log
Lot 2, Sillivan Subdivision
Another view of automatic distribution valve enclosure and trenches.
Photograph showing effluent transport line exiting the dose tank riser.
Job No. 113 161B