Construction Phase

Vibration Monitoring
Potential ground-borne vibration onto the historic buildings and structures in CPS, the granite walls at Old Bailey Street and the Proposed Grade 3 Historic building (No. 20 Hollywood Road) outside CPS is anticipated during site formation and excavation and lateral support works.  It is recommended that prior to commencement of the construction works, a baseline condition survey and baseline vibration impact be conducted by a specialist to define the vibration control limits and recommend a vibration monitoring proposal for the concerned historic buildings and structures in and outside CPS for AMO’s prior approval before commencement of the construction works.

If the evaluated and/or measured vibrations have been found to exceed the allowable values or if damage to either structural or non-structural elements of the historic buildings have been identified, the construction work should be stopped and the construction method and appropriate mitigation measures should be the reviewed and submitted to the AMO for approval.

Compliance of the Approved Measures and Auditing
Staff training by an experience building conservation expert or relevant competent person(s) in the environmental team of the project should be provided to the on-site staffs, contractors, sub-contractors and workers of the project before commencement  of works to ensure their full understanding of the approved protection schedule, restoration proposal and work methodologies  related to cultural heritage, and their respective responsibilities in the implementation of the environmental protection measures.

Regular site audit for cultural heritage should be carried out in the construction phase by an experience building conservation expert in the environmental team (“the Heritage Checker”) to investigate the site practice of the contractors and workers and their compliance of the approved work methodologies with respect of conservation works, mitigations for cultural heritage and any related works.  A detailed proposal of the regular audit such as methodology (e.g. performance and monitoring indicators, control tools, frequency of the audit, etc.) and the conservation professionals to be engaged should be agreed with AMO prior to work commencement.

The Heritage Checker shall also attend the regular site meetings with AMO and report the compliance and effectiveness of the mitigation measures for cultural heritage.

Operational Phase

An archival recording should be conducted to provide a detailed reference for the update of the Conservation Management Plan and inventory of historical features of the monuments, the preparation of as-built drawings showing the condition of the historic buildings and structures after the completion of the construction works.  These archival records will be a reference source for future maintenance of the character defining elements, conservation of the monuments, interpretation and conservation education of the Site.  The archival recording shall include but not limit to the video and photographic recording on the detailed process of the repair trials for different kinds of historical features, conservation works of character defining elements and historic fabrics of the monuments, and a written records of any new changes to the detailed design made in the construction phase illustrate with photos and drawings.  A full set of the archives records (including both hard and soft copies) should be submitted to the AMO after the work completion for record purpose.  Any new findings related to the conservation of built heritage in the Site identified during the detailed design stage and construction phases shall be properly recorded in details for notification to the AMO and update of the Conservation Management Plan.

Regular audit is recommended for checking the compliance and effectiveness of the strategies and mitigation measures mentioned in Sections 3.7.4 and 3.7.5 should be conducted.  The detailed proposal of the regular audit such as methodology (e.g. performance and monitoring indicators, control tools, frequency of the audit, etc) and the conservation professionals to be engaged should be agreed with AMO prior to operation commencement. 

The management team shall ensure the audit to be carried out by an experience building conservation expert in order to investigate the site practice and work methodologies of the work contractors, the tenants and any other stakeholders of the Site with respect of conservation works, site interpretation of cultural heritage, and any related works in the operation phase.

At present no operational phase EM&A for archaeological resources and built heritage outside the CPS Site is considered necessary.