California Department of Transportation

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Materials Lab



Laboratory Policies and Procedures




Checklist for Construction Sampling

asphalt plant

The Following list serves as a quick guide. Please refer to Section 39 of the Standard Specifications for complete information.

Job Mix Formula (JMF)

  • All material is to be sent with contractors proposed Section 39 Target Values, and Bin Percentages if Batch Plant.
  • Include 4-quart cans of the type of oil to be used.

Batch Plants

  • Minimum of 2 bags per bin (if dust is used, 1 concrete cylinder container 2/3 full).

Drum Plants

  • Minimum of 4 bags per mix (3/4", 1/2", etc.).

Street Samples

  • Hot Mix Asphalt (HMA)- 4 cartons (full)
  • Open Graded Friction Course (OGFC) - 2 - 1 gallon cans
  • Aggregate Base (AB) - 2 bags
  • Shoulder Backing - 2 bags
  • R-Value - 2 bags
  • Portland Cement Concrete (PCC) - 4 bags aggregate, 2 bags sand.
  • All other - l bag minimum.


  1. Bags, cans, and cartons may be procured within each district and must comply with sizes stipulated in Section 8 of the Caltrans Construction Manual.  
  2. All samples are required to include the necessary paperwork (i.e. TL-101's, TL-502's, etc.).