The governing board shall have control of contracts for construction work being done for the district, and shall direct the district's engineer to provide a qualified project representative to perform periodic or continuous on-site observation of the progress and quality of the executed work to determine if construction is in substantial accordance with and includes all items in plans and specifications approved by the executive director. The scope of work and construction schedules shall govern the amount of on-site observation that is necessary to effectively monitor construction activities. The governing board shall authorize the services of a resident project representative if necessary to further protect the district against defects and deficiencies in construction. The responsibility for determining the optimum amount of on-site observation should remain with the consulting engineer who is required during the progress of the construction work to submit to the governing board and the executive director detailed written reports showing whether or not the contractor is complying with the contract.