HomeMy WebLinkAboutAs-Built Evaluation of OWTS DesignHEPWORTH-PAWLAK GEOTECHNICAL
January 29, 2016
Michael Egan and Pauli Hayes
928 Branch Road
Scottsville, VA 24590
(paill o2 @g mail.com)
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Job No. 115 0698
Subject: As-Built Evaluation of Onsite Wastewater Treatment System, Proposed
Residence, Lot 13, Filing 2, Elk Springs, 480 Pinon Point, Garfield
County, Colorado
Dear Michael and Pauli:
As requested, Hepworth-Pawlak Geotechnical (HP Geotech) observed the installation of
the onsite wastewater treatment system (OWTS) for the proposed residence at the subject
site. Our observations and recommendations are presented in this report. The services
are supplemental to our agreement for professional services to you dated February 26,
2015.
We previously designed the OWTS for the residence and presented our recommendations
in a report dated July 31, 2015, Job No. 115 069B. The system was designed for three
bedrooms. The system was installed by Sacred Grounds Excavating.
We performed our As-Built site evaluation on December 7 and 10, 2015. The OWTS
components observed included: septic tank, effluent transport pipe, distribution box,
chambers, inspection ports, drain and the locations of these components. Arc 36
Infiltrators were used instead of the specified Quick 4 Plus Infiltrators which is
acceptable. The installation and locations of system components were approximated as
shown on Figure 1. Photographs of the OWTS installation are provided in the attached
Photograph Log. The soils exposed in the Infiltrator trench excavations are similar to
those assumed in the design and consisted of very gravelly Loam soils.
It is our opinion that the OWTS was installed in general conformance with our July 31,
201 S design. The final site grading should surface run-off away from the soil treatment
area (STA) field.
Parker 303-841-7119 • Cll\oraJo Springs 719-633-5562 • Silv<..:rtlmrnc 970-468-1989
Michael Egan and Pauli Hayes
January29, 2016
Page2
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.
Sincerely,
HEPWORTH -PAWLAK GEOTECHNICAL, INC. er-c '/fu..---
Tom C. Brunner, Staff Engineer
attachments
Job No. I IS 0698
APPROXIMATE SCALE :
1 INCH = 40 FEET
115 0698 ~ech
H£PWORTI+PAWl..AK GEOTI;;CHNICAL
'
LOT 13, ELK SPRINGS, FILING 2
owrs AS-BUILT SITE PLAN FJGURE1
OWT S As-Built Photograph Log
L ot 13, Elk Springs, Filing 2
Garfield County, Colorado
Profile view of distribution box.
Job No. 115 0698
OWTS As-Built Photograph Log
Lot 13, Elk Springs, Filing 2
Garfield County, Colorado
View of outlet of septic tank with effluent filter.
View of pipe at the inlet of the uphill row of infiltrators.
Job No. 115 0698
OWTS As-Built Photograph Log
Lot 13, Elk Springs, Filing 2
Garfield County, Colorado
Photograph showing typical infiltrator trench and chamber conditions.
Job No. 11 S 0698
..
'I
OWTS As-Built Photograph Lug
Lot 13, Elk Springs, Filing l
Garfield County, Colorado
Photograph showing ba ckfilled piping from distribution box to absorption field .
Job No. 115 069()