Page 43 - _ 180314 Special Yucaipa GSA Packet

Request for Proposals
Infiltration Testing Implementation for
Thirteen Sites in Yucaipa Basin Area
Yucaipa Basin Recharge Study
Page 3

disturbed condition.
Water Sources

Potable water from local hydrants is the preferred source of water supply for all
investigation sites with the exception of the Wilson Creek Basins (where SWP water is
proposed). Potential water retailers include Yucaipa Valley Water District, Western
Height Water Company, and South Mesa Water Company. Locations of the hydrant
nearest to each test infiltration basin (if applicable) are shown on the zoomed-in maps
for each site on Figures 1 and 2. The amount of water added to each test infiltration

basin will be measured using a totalizing flowmeter connected to the hydrant. A float
valve is required to be used to automatically control the amount of water added to each
test infiltration basin during testing. Manually adjusting the water flow via a gate valve
to match the basin infiltration rate for the duration of the test will not be an option. If
water from a nearby hydrant is not available, water may be trucked in and temporarily
stored in an onsite water storage tank (with temporary location of the tank to be
determined). It is also possible that infiltration testing at a site would not occur if onsite
water storage is necessary.

III. SCOPE OF SERVICES

The project has been generally broken into two tasks: (1) Field work and (2) data
analysis and reporting. The minimum requirements for each task are described in the
following sections. Once finalized, all electronic files must be submitted to Valley
District in the latest editions of the following software programs: Microsoft Excel,
Microsoft Word, Adobe Acrobat and Microsoft Project. No other electronic file format

will be accepted without written approval from Valley District.

1) Implement recharge testing work plan as prescribed in the Infiltration Test
Work Plan for Thirteen Investigation Sites by TODD Groundwater (Exhibit A),
which generally includes but is not limited to:

Engineering – Field Coordination and Project Management.
Provide process flow diagram for a recommended water conveyance and flow
control system that is robust and automated (preferably)
Prepare Work Plans for Each Site and Design Basin Tree and Manifold. Provide
plans to the San Bernardino County Flood Control District containing all
proposed BMP’s.

Yucaipa Groundwater Sustainability Agency - March 14, 2018 - Page 43 of 226