SHN Consulting Engineers & Geologists, Inc.
Willits,
California
View Accreditation Certificate
Leif
Wanta
335 S. Main Street
Willits
,
California
95490
Phone: (707) 354-3542
Fax:
lwanta@shn-engr.com
https://http://www.shn.com
Quality Management System - accredited since 7/2/2008
R18, C1077 (Concrete), D3740 (Soil), E329 (Concrete), E329 (Soil)
Soil - accredited since 7/2/2008
D698, D1140, D1557, D2216, D4318, D6938
Aggregate - accredited since 7/2/2008
C40, C117, C127, C702, D2419
Concrete - accredited since 8/7/2008
C31 (Cylinders), C39, C138, C143, C172, C231, C511, C617 (5000 psi and below), C1064, C1231 (7000 psi and below)
Please note that our accreditations do not include an expiration date. An accreditation only expires when the laboratory fails to comply with our accreditation requirements.
* This information is only valid as of 10/27/2026. Please visit https://aashtoresource.org for current accreditation status.
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