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5.7 Biological Resources

d. Schedule: Restoration/revegetation sites will be established
between October 1 and January 30. Seeding and planting of
container plants will take place immediately after preparation of
the mitigation sites and will take place under the supervision of the
County Forester.
e. Maintenance Plan and Guidelines: The Maintenance Plan, to be
approved by the County, will include (i) weed control;
(ii) herbivory control (e.g., feral pigs); (iii) trash removal; (iv)
irrigation system maintenance; (v) maintenance training;
(vi) replacement planting; and (vii) a vehicle washing program to
capture invasive propagules. The Maintenance Plan will also
indicate who is responsible for each of these listed tasks.
f. Monitoring Plan: The monitoring plan, to be approved by the
County, will include (i) qualitative monitoring (i.e., photographs
and general observations); (ii) yearly quantitative monitoring (i.e.,
randomly placed transects to assess vegetation type coverage and
systematically assess all mitigation oak trees); (iii) performance
criteria as approved by the County; and (iv) annual reports that will
be submitted to the County for five consecutive years after initial
planting (or longer if the County requires) and following plan
approval.

g. Long-Term Preservation: Long-term preservation of the
mitigation site(s) will be outlined in the Restoration Plan to ensure
that they are not impacted by future development. An open space
dedication, conservation easement, performance bond,
management by the Tejon Ranch Conservancy, or other
County-approved method will be used to ensure long-term
preservation.

h. Growth/Vegetation Standards: Growth/vegetation standards
will be developed by a qualified Biologist in accordance with County
and regulatory agency requirements.

Oak Trees

The mitigation approach for replacing lost oak trees shall comply with the
County of Los Angeles Oak Tree Ordinance (CLAOTO) requirements. The goal
of this program is to replace impacted oak trees at a ratio of 3:1 for
non-heritage oaks and 10:1 for heritage oaks in accordance with the County’s
oak tree permit requirements. This would result in the establishment of 322
oak trees. However, if Project impacts are reduced through a reduction in
Project disturbance limits within oak woodland areas, required tree numbers
will be reduced accordingly.

Mitigation trees are typically planted on lands with minimal habitat value (e.g.,
ruderal vegetation, graded slopes) rather than in areas with a substantial

R:\Projects\PAS\CEN\000306\Draft EIR\5.7 Bio_051117.docx 5.7-186 Centennial Project
Draft EIR