Page 44 - _ 180314 Special Yucaipa GSA Packet

Request for Proposals
Infiltration Testing Implementation for
Thirteen Sites in Yucaipa Basin Area
Yucaipa Basin Recharge Study
Page 4
Contractor Pre-Field Work Tasks—Including finalizing water source locations
with Valley District staff and coordinating a preconstruction meeting with
Valley District and San Bernardino County Flood Control District (SBCFCD)
staff.
Contractor Mobilization, Setup, and Startup
Site Security and Fencing
Site Visits (opportunity to coordinate with local staff from participating
agencies for field monitoring activities during testing)
Transportation of Equipment from Existing Site to New Site
Site Demobilization (13 sites)
Traffic Ramps and Signage
Engineering – Data Analysis and Reporting

Contractor to provide all services and equipment necessary to conduct and complete

the proposed infiltration work plan. For each test basin the contractor is expected to:
1. Dig Test Basin. A 30-foot by 30-foot basin is recommended. However, a smaller
test basin footprint (e.g 20-foot by 20-foot) can be used to reduce water needs
for sites where a direct water source is not available and onsite water storage
tanks and trucking of water to the site is needed. Please propose on 30 x 30
basins (unless otherwise specified).
2. Excavated soils to be temporarily stored adjacent to test basin—not within
existing channels (where this applies) but on channel banks.
3. Setup water conveyance, flow control system, and water tank (if needed).
4. Run pipeline from back flow preventer to manifold or tank—setup will be site
specific, however.

5. Fill basin with water to 3 feet deep.
6. Open the manifold valves and allow float valves to automatically maintain water
levels.
7. Monitor operation of equipment and collect data from flow meters.
8. Visit site as needed to check operation of equipment and to collect data.
9. Return to site to demobilize equipment after recharge test is determined
complete (assume after 14 days of operation).
10. Backfill test basin with excavated material to return site to pre-disturbed grade.

11. Transport equipment at existing site to new site.

Proposed field scheduling and sequencing shall be included, along with difference in
pricing, for shorter testing periods (e.g. if three infiltration test systems are fabricated
and used instead of two systems).

Yucaipa Groundwater Sustainability Agency - March 14, 2018 - Page 44 of 226