Reference to the above mentioned subject, and to your letter dated 28/07/2016 regarding the infrastructure utilities below ground at site, please be informed that we received on 02/10/2016 reply from National Guard Riyadh confirming that they don't have "as built drawings" for the underground utilities at site, Therefore you are kindly requested to conduct "Probe Diggings" to identify and avoid damaging any buried services below the boreholes.
For the access to site and the presence of our representative, please provide us the expected soil investigation staring date in order to send our surveyor at site to assist you on this matter.