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Section 10 – Environmental Controls at Work Site

10-10.03 Existing Sewers and Storm Drains

Because of the potential danger of solvents, gasoline, and other hazardous material in

existing sewers and storm drainpipes, these areas shall be treated as permit-required confined

spaces unless it has been proven, through appropriate testing, that no hazards exist or are

expected to develop.

10-10.04 Joint Agency – Contractor Entries

Unless otherwise directed in writing by the Agency, when Agency employees work along

side the Contractor in a permit-required confined space, the permit procedures for both the

Agency and the Contractor shall be used. The Entry Supervisor shall coordinate the

requirements of both permit procedures prior to entry.

The Contractor shall keep the site in a neat and presentable condition. The Contractor shall

dispose of surplus materials, clean out all drainage ditches and structures, and repair any

fences or other property damaged during the progress of the Work. When material is disposed

of outside of an easement, street, or highway right-of-way, or other Agency-owned properties,

the Contractor shall do so in accordance with the Contract Documents.

10-12 ARCHEOLOGICAL AND CULTURAL RESOURCES

If archeological or cultural resources are discovered during the Work, the Contractor shall

cease all construction operations in the vicinity of the discovery until a qualified archeologist can

assess the value of these resources and make recommendations to the State Historic

Preservation Officer.

Archeological and cultural resources include artifacts, large amounts of

bone, shell, or flaked stone, and other evidence of human activity.

If the State Historic

Preservation Officer or the Agency directs that work be temporarily ceased at the location of an

archeological or cultural find, the Contractor shall temporarily suspend work at the location.

If the Agency or the State Historic Preservation Officer temporarily suspends a portion of the

Work for cultural purposes, any associated delays are considered unavoidable in accordance

with Section 7-12.02, “Unavoidable Delays”, of these Specifications.

10-13 PROTECTION OF EXISTING TREES

Special attention shall be given to protection of certain native and ornamental trees or

shrubs, landmark trees, and all native oak trees in the County of Sacramento. Additional

requirements for specific trees may be shown on the Plans, or designated in the Special

Provisions or by the Agency. No native oak trees shall be removed or disturbed unless

specifically designated for removal on the Plans or by the Agency. Every reasonable effort shall

be made to avoid creating conditions adverse to the tree’s health. The natural ground within the

dripline of protected trees shall remain as undisturbed as possible. The dripline area shall be

identified on the ground by a circle with a radius measurement from the trunk of the tree to the

tip of its longest limb. The limb cannot be cut back in order to change the dripline. The area

within the dripline is a critical portion of the root zone and defines the minimum protected area

of each tree. Removing limbs within the dripline does not change the originally protected root

zone. Measures required for protection of existing trees shall include, but are not limited to, the

Temporary protective barrier fencing, with a minimum height of four feet (4’-0”) shall

be installed continuously around the dripline perimeter of the protected trees prior to