Lab details for Sierra Geotech DBE - BoxLab 1
Basic Information
| Lab Name | Sierra Geotech DBE - BoxLab 1 |
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| Manager Name | Raymond Downes |
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| Lab Email | ray@sierrageotech.com |
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| Lab Telephone | 916-425-0359 |
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| Lab Fax | |
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| Lab Full Address | 4470 Yankee Hill Road, Suite 110, Rocklin, CA 95677 |
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| Zip | 95677 |
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| Lab Type | Private |
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| District | 3 |
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| Mobile Lab Full Address | , , |
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Download TL-0113
RSP Information
4470 Yankee Hill Road, Suite 110, Rocklin, CA 95677
California Test (CT) Accreditations
AASHTO/ASTM Proficiencies
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Technician Certified? |
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No results found. |
Technicians in the Lab
Technician Summary
Total 5 items.
| First Name | Last Name | Actions |
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| Michal | Kosakowski | View
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| Steven | Olsen | View
|
| Robert | Pierson | View
|
| Angel | Gutierrez | View
|
| Romeo | Valdez | View
|
Technician Details
Details for Michal Kosakowski
| First Name | Michal |
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| Last Name | Kosakowski |
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| Status | Active |
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Total 15 items.
Certified California Tests(CT)
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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| CT 125 AGG: Sampling - AGGREGATES (JTCP) | 2018-02-26 | 2021-02-26 | Expired | Jessaneil Perez | No |
| CT 125 AGG: Sampling - AGGREGATES | 2023-02-16 | 2025-02-16 | Expired | Ignocencio Herrera | Yes |
| CT 125 CEM: Sampling - CEM | 2019-02-26 | 2021-02-26 | Expired | Jessaneil Perez | No |
| CT 125 GEN: Sampling - GENERAL | 2023-02-16 | 2025-02-16 | Expired | Ignocencio Herrera | No |
| CT 125 HMA: Sampling - HMA (JTCP) | 2018-02-26 | 2021-02-26 | Expired | Jessaneil Perez | No |
| CT 125 HMA: Sampling - HMA | 2023-02-16 | 2025-02-16 | Expired | Ignocencio Herrera | No |
| CT 231: Relative Compaction - Nuclear Gage | 2023-02-16 | 2025-02-16 | Expired | Ignocencio Herrera | No |
| CT 375: AC Density by Nuclear Gage | 2023-02-16 | 2025-02-16 | Expired | Ignocencio Herrera | No |
| CT 504: Air Content of PCC - Pressure Method (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
| CT 518: Unit Weight - PCC (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
| CT 539: Sampling Fresh Concrete (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
| CT 540: Making Cylinders - PCC (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
| CT 543: Air Content of PCC - Volumetric Method (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
| CT 556: Slump - PCC (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
| CT 557: Temperature - PCC (JTCP) | 2018-02-24 | 2023-02-24 | Expired | Biplab Bhattacharya | No |
AASHTO/ASTM Proficiencies
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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No results found. |
Details for Steven Olsen
| First Name | Steven |
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| Last Name | Olsen |
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| Status | Active |
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Total 5 items.
Certified California Tests(CT)
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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| CT 125 AGG: Sampling - AGGREGATES | 2023-04-25 | 2024-04-25 | Expired | Rahshaun Spears | Yes |
| CT 125 GEN: Sampling - GENERAL | 2023-04-25 | 2024-04-25 | Expired | Rahshaun Spears | No |
| CT 125 HMA: Sampling - HMA | 2023-04-25 | 2024-04-25 | Expired | Rahshaun Spears | No |
| CT 231: Relative Compaction - Nuclear Gage | 2023-04-25 | 2024-04-25 | Expired | Rahshaun Spears | No |
| CT 375: AC Density by Nuclear Gage | 2023-04-25 | 2024-04-25 | Expired | Rahshaun Spears | No |
AASHTO/ASTM Proficiencies
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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No results found. |
Details for Robert Pierson
| First Name | Robert |
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| Last Name | Pierson |
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| Status | Active |
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Total 5 items.
Certified California Tests(CT)
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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| CT 125 AGG: Sampling - AGGREGATES | 2023-06-16 | 2024-06-16 | Expired | Rahshaun Spears | Yes |
| CT 125 GEN: Sampling - GENERAL | 2023-06-16 | 2024-06-16 | Expired | Rahshaun Spears | No |
| CT 125 HMA: Sampling - HMA | 2023-06-16 | 2024-06-16 | Expired | Rahshaun Spears | No |
| CT 231: Relative Compaction - Nuclear Gage | 2023-06-16 | 2024-06-16 | Expired | Rahshaun Spears | No |
| CT 375: AC Density by Nuclear Gage | 2023-06-16 | 2024-06-16 | Expired | Rahshaun Spears | No |
AASHTO/ASTM Proficiencies
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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No results found. |
Details for Angel Gutierrez
| First Name | Angel |
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| Last Name | Gutierrez |
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| Status | Active |
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Total 9 items.
Certified California Tests(CT)
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
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| CT 125 AGG: Sampling - AGGREGATES (JTCP) | 2025-06-20 | 2028-06-20 | Inactive | Wei Geng | No |
| CT 201: Sample Preparation - Soil and Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | No |
| CT 202: Sieve analysis - Fine and Coarse Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 205: Percent Crushed Particles (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | No |
| CT 216: Relative Compaction - Soils and Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 217: Sand Equivalent (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 226: Moisture Content - Soils and Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 227: Cleanness Value (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 229: Durability (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
AASHTO/ASTM Proficiencies
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
|---|
No results found. |
Details for Romeo Valdez
| First Name | Romeo |
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| Last Name | Valdez |
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| Status | Active |
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Total 9 items.
Certified California Tests(CT)
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
|---|
| CT 125 AGG: Sampling - AGGREGATES (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | No |
| CT 201: Sample Preparation - Soil and Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | No |
| CT 202: Sieve analysis - Fine and Coarse Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Inactive | Wei Geng | Yes |
| CT 205: Percent Crushed Particles (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | No |
| CT 216: Relative Compaction - Soils and Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 217: Sand Equivalent (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 226: Moisture Content - Soils and Aggregates (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 227: Cleanness Value (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
| CT 229: Durability (JTCP) | 2025-06-20 | 2028-06-20 | Active | Wei Geng | Yes |
AASHTO/ASTM Proficiencies
| Test Method | Obtained Date | Expiration Date | Status | IA Responsible | Within Lab Scope? |
|---|
No results found. |
For concerns with missing or erroneous data, please contact your Independent Assurance personnel