HomeMy WebLinkAboutOWTS Soil Investigation - ADDENDUM 08.03.2024
Geo Quest Project No. 24-157
Date: 8/3/24
Stephen Self
Parcel No. 217903100006
1098 County Road 214
Silt, CO 81652
970-274-0064
stephen@willowwisp.net
RE: Onsite Wastewater Treatment System (OWTS)-Detailed Soil InvesƟgaƟon
Dear Mr. Self,
Geo Quest was asked to perform a soil evaluaƟon for OWTS improvements at the residence located at
1098 County Road 214 in Silt, Colorado. This memo presents the invesƟgaƟon details and USDA soil type
encountered at the residence on Saturday, August 3, 2024. This informaƟon may be used in OWTS de-
sign.
Two soil profile test pits, idenƟfied as Test Pit 1 (TP-1) and TP-2, were excavated south of the residence at
or near the proposed improvement area. The excavaƟons were completed with a Bobcat mini excavator
to depths of 9 feet below ground surface.
RepresentaƟve soil samples were collected at mulƟple depths as appropriate. These samples were evalu-
ated by Geo Quest using the USDA Soil Texture and Structure methods. Generally, the soil in both exca-
vated test pits correlates to a Type 3A, Silty Clay Loam, based on CDPHE, RegulaƟon No. 43, Table 10-1 as
presented below.
Ground water was not encountered in the excavaƟons at the Ɵme of the invesƟgaƟon. Neither bedrock
nor a limiƟng layer were encountered to the depths explored.
Soil Treatment Area Long-Term Acceptance Rates by Soil Texture, Soil Structure, Percola Ɵon Rate and
Treatment Level
Soil Type USDA Soil
Texture
USDA Soil
Structure-Type
USDA Soil Structure-
Grade
Treatment Level 1
(MPI)
Treat-
ment
Level 1
3A Silty Clay
Loam Massive 1-Weak 61-75 0.30
Respecƞully submiƩed,
Kevin E. Dye, P.E.
Principal
Geo Quest, LLC
AƩachments: Project Site and Test Pit LocaƟon Map, Test Pit Logs
8/4/24
Approximate Project Site and Test Pit LocaƟon map
TP-1
TP-2
Yellow Highlight
Shows Proposed
OWTS Improvement
Area
Silt
Project LocaƟon