2521.01 DESCRIPTION.
This describes certified plant inspection. Certified plant inspection will be required for Interstate, Primary, state park, and institutional projects. It will apply to other projects only when designated. When this specification applies, the Contractor shall furnish or be responsible for certified plant inspection for the work, as specified herein.

2521.02 REQUIREMENTS.
Certified plant inspection shall be in accordance with Materials I.M. 213, utilizing personnel certified for the type of inspection to be accomplished and utilizing prescribed test equipment furnished by the Contractor. The equipment shall also be available for use by the Engineer for monitoring purposes.

When a field laboratory or office is furnished, as provided in Section 2520, exclusive use by the Engineer for inspection purposes is intended. Additional field laboratory space and equipment and/or office space, for use by the Contractor to fulfill the requirements of Certified Plant Inspection, are incidental to the contract unit price for the item for which this inspection is required.

Delivery of samples to the District Materials Laboratory may also be required. The provisions for this are in accordance with Section 2534.

2521.03 APPLICATION.
This specification applies to all HMA, HMA patching material, PCC, structural concrete, and flowable mortar, except where excluded by a note in the contract documents.

The Engineer may waive aggregate gradations, moisture, and specific gravity tests based on previous satisfactory experience with the plant for PCC which is furnished at a maximum rate of 25 cubic yards (25 m²) per day, whether from one or more sources. This may be based on quantities planned by the Contractor several days ahead of placement.

2521.04 METHOD OF MEASUREMENT AND BASIS OF PAYMENT.
Certified plant inspection will not be measured or paid for separately. It shall be included in the contract unit price for the item for which this inspection is required.