NWCEL Northwest Council of Engineering Labs

Become a
Special Inspector

›› Introduction
›› License Types
›› Types of Work


Inspection Courses

Reinforced Concrete:
›› Placement/Batch Plant
›› Reinforced Concrete
›› Pre/Post-Tension
›› Shotcrete Intro.
›› Shotcrete Recert.

Steel & Welding:

›› Steel & Welding I
›› Steel & Welding II
›› Steel & Welding Intensive

Masonry Inspection

Ultrasonic Technician
›› Certification Program

Magnetic Particle Testing Level II

Special Inspector Certification Renewal

Lateral Framing Special Inspection

Proprietary Anchors Inspection

Plan Reading

›› In-Place Density
›› Aggregate
›› Asphalt II

WAQTC In-Place Density Technician

WAQTC In-Place Density Technician

Laboratory (L)
EXAM Written (W)
Performance (P)
T 99 Standard Proctor C W
T 180 Modified Proctor C W
R 75 Family of Curves C, L  
T 272 One Point Proctor C, L W, P
T 255/T 265 Moisture of Aggregate/Soil C, L W, P
T 85 Specific Gravity of Coarse Aggregate C, L  
T 310 Nuclear In-Place Density of Soil/Aggregate C, L W, P
T 209 Theoretical Maximum Density of Asphalt C  
T 166 Bulk Specific Gravity of Asphalt C  
T 355 Nuclear In-Place Density of Asphalt C, L W, P
  • Attendance of training sessions is required prior to taking the written and practical exams.
  • Students must pass the written exam before taking the practical exam.
  • After successfully passing both the written and practical exams, WAQTC certification numbers will be issued by WSDOT.
  • WAQTC certification is accepted in the following states: AK, CO, HI, ID, NM, OR, TX, UT, and WA

You will receive an In-Place Density manual with the WAQTC FOP procedures for the test methods listed above. You can also download these test procedures at www.waqtc.org

Instructor:  Chris Christensen is a registered professional engineer in Washington, Alaska, Nevada and Utah. He has been a WAQTC examiner for the past 16 years. He has worked on dozens of airport and highway projects during his 28 years of experience in the construction testing and inspection industry.

For question, contact Thanh Kieu at (253) 230-8539 or email thanh@aartesting.com.


Module Member Member Exam only * Non-Member Non-Member Exam only *
In-Place Density Technician $400.00 $225.00 $480.00 $250.00
Embarkment & Base Technician $400.00 $225.00 $480.00 $250.00
In-Place Density Technician AND
Embarkment & Base Technician
$450.00 $275.00 $540.00 $300.00

* Challenging an exam without completing the classroom instruction is allowed, but is strongly discouraged unless the technician is renewing their certification.