- California Test Methods
- NEW! Inertial Profiler Certification Program
- District 01 MPQP Certifiied HMA & PCC Plants
- Statewide MPQP Contact List
- MPQP HMA and PCC Plant Certification formerly CTM 109
- Independent Assurance Program (IAP)
- 23 CFR 637 Definition of the Independent Assurance Program
- Pavement Selection Information
- Structural Section Request Information
- Check List for Construction Sampling
- Pavement Deflection Study
- Pavement coring
- (R-Value)Resistance to Deformation of Aggregates and Soils Under Traffic Loads
- Culvert Studies
- John Loudon McAdam, King of the Roads Reprinted from "The Highlander" Magazine. The Magazine of Scottish Heritage January/ February 2003
- Laboratory Safety Manual 2014
- Code of Safe Practices 2010
- Independent Assurance Manual
- Section 39 HMA Hot Mix Asphalt
- Quality Control Manual for Hot Mix Asphalt
- HMA Plant Inspection Manual
- Material Plant Quality Program (MPQP) Manual
- Draft WMA (Warm Mix Asphalt)
- Draft MPQP Polymer Concrete Volumetric Trucks
- PCC Plant Inspection Manual
- Highway Design Manual
- Construction Manual
- NEW! RAP Check Calculator
- CTM 202 Grading Analysis
- CTM 216/ 231 Relative Compation Test - Nuclear
- CTM 309 Rice Specific Gravity
- CTM 379 Nuclear AC Content
- CTM 382 Ignition Furnace Calib.
- CTM 382/ 370 Ignition Furnace/ Moisture Content
- CTM 521 PCC Cylinder Compressive Strength
Laboratory Policies and Procedures
- California Test Methods
- Lab Procedures
- Acceptance Testing Turnaround Times
- Lab Workload Priority
- Correcting Errors in TL-101s and/or Submitted Samples
- Disposal of Test Samples
- Nuclear Density and Asphalt Gauge Procedures
- Material Engineering and Testing Services (METS)
- CT District 08 Materials Engineering
- Radiologic Health Branch
- Del Norte
District 01 Field Labs
Nuclear Density and Asphalt Content Gauge Procedures
To receive a nuclear gauge for field use, a CalTrans Certified Materials Tester holding a valid Radiation Training Certificate must contact and take delivery of the nuclear gauge from the District 01 Radiation Safety Officer (RSO), or the Alternate Radiation Safety Officer (ARSO) and comply with all pertinent sections of CTM 121. When a gauge is returned, either the RSO, the ARSO or their appointed delegate must be present to receive, log in and secure the gauge.
In an emergency contact the RSO and /or the ARSO immediately.
RSO, George Thorpe
Office (707) 445-6375
Cell (707) 498-3249
ARSO, Loren Lee
Office (707) 445-6374
Cell (707) 498-9721
Tips and Reminders:
- The nuclear gauge must be transported and stored with the corresponding 3-ring binder and under a minimum of three (3) locks.
- Never leave a gauge unattended.
- Never use a gauge in the rain, not even light rainfall.
- CalTrans’ license with the California Department of Health Services, Radiological Health Branch, requires annual wipe/leak tests and analysis on all gauges. These tests are performed at the end of January. Therefore, all gauges must be returned to the Lab during that time. Replacement gauges will be available to those with testing needs.
- It is the Field Tester's is responsibility to notify the RSO if the gauge is moved to a different location from the location originally reported.