HomeMy WebLinkAboutEngineer's Certification of OWTS 08.21.202011C+A
Komar & Associates, Inc.®
Geotechnical and Materials Engineers
and Environmental Scientists
5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
An Employee Owned Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
August 21, 2020
Tito Montes
c/o Palomino Design Build
Attn: Jack Palomino
919 Palmer Avenue
Glenwood Springs, Colorado 81601
(jackpalotnino55 cr,gtnail.com)
Project No. 18-7-532.02
Subject: Certification of Onsite Wastewater Treatment System, Proposed Residence,
46291 Highway 6, Canyon Creek area, Garfield County, Colorado
Gentlemen:
A representative of Kumar & Associates observed the installation of the Onsite Wastewater
Treatment System (OWTS) for the residence at the subject site as required by the Garfield
County Environmental Health Department. Our observations and recommendations are
presented in this report. The services are supplemental to Kumar & Associates agreement for
professional services to Tito Montes dated November 1, 2018.
We previously designed the OWTS for the residence as submitted in our report dated February 4,
2019, Project No. 18-7-532.02. The system was designed for three bedrooms.
We performed our as -built evaluations on July 21, 22, and 27, 2020. The OWTS components
observed included: sewer line, cleanout, septic tank, effluent line, distribution box and 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. Pictures of the OWTS components
made during the site visit are included with this report. An additional shallow profile pit was
excavated at the west end of the STA to verify the soils in this area of the site. The distance
locations to the septic tank shown on Figure 1 were made by taping.
The septic tank, distribution box and STA chambers were changed from the design by the
installer. The septic tank was changed from the design 1,000 gallon, two -chamber Valley
Precast septic tank to a 1,250 gallon, two -chamber low -profile Norwesco plastic septic tank. The
distribution box was changed from a Tuf-tite 4 -hole distribution box to a precast concrete 8 -hole
distribution box. The STA chambers were changed from Infiltrator Quick4 Plus Standard
chambers to ARC36 chambers. Due to the size difference in the chambers, the STA was
changed from 3 rows of 18 Infiltrator Quick4 Plus Standard chambers to 3 rows of 14 ARC36
chambers to increase the STA to a similar size to our design. The changes are deemed
acceptable to us.
It is our opinion that the OWTS was installed in general conformance with the above referenced
design.
Tito Montes
August 21, 2020
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 Submitted,
Kumar & Associates, Inc.
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Shane M. Mello, Staff Engineer
Reviewed by:
David A. Young,
SMM/kac
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Kumar & Associates, inc. Project No. 184-532.02