Edit of a contractor letter

Can you please correct sentences. Please re – write the sentences and please re – write the whole sentences.. Please use high vocabulary words. Please add few more line sentences… Here is the information….

Dear Contractor,

For the above referenced project. These revisions and / or clarifications shall supercede and take precedence over previously issued Technical information specifications. We encourage proponent to review the below information prior to submitting a proposal. Each proponent must acknowledge upon receipt of this addendum.



The engineering services includes designing and implementing a proximity detection system, but is not limited to the following tasks. Please note, during the submission of the proposal, proponent can provide recommendations, suggestions and opportunities for improvement that will enhance the project.

Below information and following specifications are just scenarios it just for reference only.


The pedestrian proximity device should be able to send a signal to the haul trucks at a distance of at least 5 m (16 feet) to ensure that the truck operator is aware of any personnel in the vicinity. The system should also indicate a warning in the form of a buzzer, beacon, or LED to alert the truck driver, and pedestrian that they are close to each other. This device should automatically activate the warning signal. When reversing a large truck, the proximity device should send a warning signal to pedestrian within approximately 3 m (10 feet), and side detection of haul trucks up to approximately 2 m (7 feet).

For Continuous mining machine the proximity device should send a signal to pedestrian within approximately 2 m (7 feet) to prevent any accident from occurring.

Speed Warning:

The proximity device should provide a warning system to limit the travel speed of the haul trucks. If a truck operator reaches the set speed limit then a warning in the form of a beacon, buzzer, or LED will be activated. As the Expo underground mine site has set speed limit of 50 KM / H.

Working Condition:

This proximity detection system should operate in extreme conditions where electrical noise gas, dust, temperature (0 C – 30 C) or Humidity fluctuations are present. It must not cause electrical interference to the existing phone, PLC and radio communications networks. Interference received must be accepted, including interference that may cause undesired operation.


The system should allow authorized personnel to specify the set point values for the warning.


Ability to circumvent the proximity detection system in the event of an emergency where operator intervention is immediately required. The system should distinguish conditions that occur due to nuisance, and act accordingly. The company safety standards have to be met by the system.

Shut Down: – Eliminated for Scope of Work

Shut down of the large haul truck or Continuous miner has been eliminated from scope of work. Reason for elimination it would breach of the manufacturer’s warranty of the large haul truck or continuous miner.

No Stop:

As per Addendum Notification # 3 decided not to stop the large haul trucks (or) Continuous miner machine, as it was already been decided that this is potentially dangerous. As long as the proximity detection system can send signal to pedestrian to prevent any accident from occurring at set point values for the warning. Reason for elimination of stopping the large haul trucks or Continuous Miner Machine as it would be a breach of the manufacturer’s warranty.

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