Option 1

Locate the development footprint on areas that are 100% previously developed and for which the zone of construction impact is 100% previously developed;

OR

Option 2

For portions of the site that are not previously developed: identify limits of disturbance through the creation of construction impact zones; and limit all site disturbance to 40 feet beyond the building perimeter; 10 feet beyond surface walkways, patios, surface parking and utilities less than 12 inches in diameter; 15 feet beyond primary roadway curbs and main utility branch trenches; and 25 feet beyond constructed areas with permeable surfaces (such as pervious paving areas, stormwater detention facilities and playing fields) that require additional staging areas in order to limit compaction in the constructed area.

OR

Option 3 – Available for sites with trees only

Survey the site to identify:

trees in good or excellent condition as determined by a certified arborist,
any Heritage or Champion trees of special importance to the community as defined by a jurisdictional City, County or State Forester because of their age, size, type, historical association or horticultural value,
the caliper of all trees at 4’6” above ground (diameter at breast height or D.B.H.), and
any invasive species of tree present on the site, and whether those species threaten the health of other trees to be preserved on the site, as determined by a certified arborist. Preserve the following on the site that are also identified as in good or excellent condition:
all Heritage or Champion Trees identified,
a minimum of 75% of all non-invasive trees (including the above) over 18” in caliper (D.B.H.), and
a minimum of 25% of all non-invasive trees (including the above) that are over 12” in caliper (D.B.H.) if deciduous, and 6” in caliper (D.B.H.) if conifer.

Develop a plan, in consultation with and approved by a certified arborist, for the health of the trees, including fertilization and pruning, and construction tree protection plans and specifications which are to include protection fencing located at the drip line of each tree, and specifying that if trenching or other disturbance is necessary within the drip line, this work must be done by hand. If a certified arborist has determined that the health of the trees to be preserved is threatened by invasive vegetation, develop a plan for invasive vegetation removal and restoration. Stipulate in CC&Rs or other binding development documents that the preserved trees will be protected from development in perpetuity.

Minimize site disturbance during construction