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Geo Quest Project No. 24-154
Date:6/3/24
Ross MarkTalbott
Parcel No. 240L71-4OIOO2
9109 County Road 311
silt, co 81652
RE: Onsite Wastewater Treatment System (OWTS) Soil Evaluation
Dear Mr. Talbott,
Geo Quest was asked to perform a soil evaluation for a proposed OWTS at the residence located at 9109
County Road 31"1 south of Silt, Colorado. This memo presents the investigation details and USDA soil
type encountered at the residence on April 30,2024. This information may be used in OWTS design.
A total of four test pits were excavated for a proposed single-family residence and OWTS. The test pits
identified as TP-3 and TP-4, were excavated at or near the proposed OWTS for the soil evaluation. The
excavations were performed with a Bobcat excavator to depths of 5 feet and 7 feet respectively.
Bulk soil samples were collected for classification from each soil layer encountered. These samples were
reviewed by Geo Quest using the USDA Soil Texture and Structure Method. Generally, the soil in both
test pits correlates to a Type 3A, Clay Loam, based on CDPHF, Regulation No. 43, Table 10-L as presented
below.
Ground water was not encountered in the excavations at the time of the investigation. Neither bedrock
nor a limiting layer were encountered to the depths explored.
Soil Treatment Area Long-Term Acceptance Rates by Soil Texture, Soil Structure, Percolation Rate and
Treatment Level
Respectful ly subm itted,
Kevin E. Dye, P.E.
Principal
Geo Quest, LLC
SoilType USDA Soil
Texture
USDA Soil
Structure-Type
USDA Soil Structure-
Grade
Treatment Level 1
(MPl)
Treatment
Level 1
2 Sandy Loam Granular 2-Moderate t6-25 0.50
6/3/24
571 Sg
Aftachments: Test Pit Location Map, Logs
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