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State of California, Department of Transportation - page 44 / 52





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The Plant Inspector should request a current copy of the “CT 109” and the “Safety Inspection” for each facility from the District Weights and Measures Coordinator. The CT 109 will indicate the maximum and minimum parameters for AC production, span numbers, safety concerns or other issues. If the Plant Inspector has questions about any area of the AC plant the District Weight and Measures Coordinator should be contacted.

Safety The Plant Inspector is exposed to a variety of potential hazards. Around any kind of a plant or crushing operation, dust is generated and dispersed into the air. Dust can contain silica, which may be hazardous to your health. As you breathe the air, fine particles of dust may also enter your lungs. When worn properly, dust masks can reduce or eliminate dust in the air you breathe.

The Plant Inspector must be on the alert for haul vehicles and heavy equipment moving around the plant. Loaders are moving quickly, backing and turning trying to keep up with plant production or stockpile operations. Limited visibility around the plant site as well as blind areas on all sides of the equipment make it difficult for the operator to see. Always make positive eye contact with the truck driver or operator before crossing in front of or behind any equipment.

Most of the surfaces at asphalt plants are very hot. If the Plant Inspector does not have the proper protective clothing, such as long sleeve shirts and gloves, the potential to receive a nasty burn is quite high. When sampling asphalt binder, protective clothing and

gloves are essential.

Safety glasses

production facility or is sampling hot

are a must when the Plant Inspector is around the asphalt. Your hard hat will protect your head from

these hot surfaces, too.

The Plant Inspector must also be aware of moving belts, revolving drums, low overhead clearance, pinch points, lifting hazards, and tripping hazards. Never stop thinking about safety. The Caltrans Safety Motto “Safety is no Accident”.

AC Mix Designs A copy of the approved mix design, indicating the aggregate source, manufacturer and grade of asphalt binder, and plant proposed to mix the AC, must be in the possession of the Plant Inspector. A mix design will typically show the aggregate bin percentages, gradings, LA rattler, Durability (course and fine), sand equivalent, cleanness value, aggregate specific gravity, recommended OBC, stabilities, abrasion, swell, voids, and test maximum density. The mix design is intended to be a starting place for mix production and may need to be tweeked slightly to meet the desired requirements.

Aggregate Testing Aggregate samples are taken at various intervals, depending on the type of project. For non-QC/QA projects, Section 6 of the Construction Manual, requires Caltrans to perform

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