The subdivision construction plans shall conform substantially to the preliminary
subdivision plan as approved and may constitute only that phase of the approved preliminary
subdivision plan and other necessary improvements which the developer proposes to
record and develop. They shall also conform to all requirements of this chapter and
any other applicable provisions of the Orange County Code. In seeking approval of
the construction plans, a request for a non-substantial variance of the technical
requirements of either this chapter or the PSP approval may be approved, approved
with conditions, or denied by the county engineer. The county engineer's decision
may be appealed to the DRC, which shall consider the appeal pursuant to the procedure
set forth in section 34-27.