|Mike Van Horn, Inc.
Registered California Geotechnical Engineer | Registered California Civil Engineer
Office Phone: (831) 429-9364 | SoilSurgeon@Cruzio.com | 101 Forrest Avenue, Santa Cruz, California
FAQs: Soil Reports 2
|What is involved in completing a soil report?
soil report typically requires a preliminary site visit, the
drilling of at least two test borings at the site with a geotechnical
drill-rig, a limited soil laboratory testing program on collected soil
samples, engineering analysis of the collected information, and writing
of the soil report. The test borings are drilled to a depth of at
least 15 feet. This office usually sub-contracts the drilling with
Cenozoic Exploration geotechnical drilling services headquartered in
Aptos, and the soil laboratory testing service is Cooper Testing
Labs headquartered in Palo Alto.
|What is a minor format soil report?
firm also provides a limited scope geotechnical investigation for
selected projects. This type of investigation is substantially
less expensive, costing T&M or lump-sum fees of around $700 to
$1,200. The minor format soil report can only be provided for
very small projects at areas of low geotechnical concern. To
project for a minor format soil investigation, the project must, at a
(1) Be located within the City of Santa Cruz.
(2) Be located within the level terrace coastal zones and outside the river basin zones, and
(3) The project must include less than 750 square feet total proposed floor space.
If you feel your project may qualify for this type of soil investigation, please contact this office for further discussion.
|Following completion of a soil report, what follow-up services are typically required?
||(1) Before construction starts, soil reports and government agencies almost always require a geotechnical
plan review letter by the project soil engineer. Refer below for a
discussion of geotechnical plan reviews.
(2) Most soil reports and some government agencies, including the County of Santa Cruz, require the soil engineer to observe foundation excavations during construction.
(3) If the project includes any significant grading, most soil reports and some government agencies, including the County of Santa Cruz, require observations and soil compaction testing during grading operations. This is generally an expensive follow-up service item. Click the above link for additional information on this issue.
(4) Occasionally, soil reports will recommend the soil engineer to observe subdrain installation during construction operations. This item may or may not be required by government agencies.
Other miscellaneious and less frequent construction observations may be recommend in the soil report or required by government agencies.
(3) The County of Santa Cruz requires a final conformance letter by the soil engineer, stating the completed project is in general conformance with the soil report. Refer below for a discussion of these final geotechnical conformance services.