Page 249 - _ 180314 Special Yucaipa GSA Packet

February 2, 2016

Aaron Jones
Assistant Engineer
San Bernardino Valley Municipal Water District
380 E Vanderbilt Way
San Bernardino, CA 92408

RE: Infiltration Testing Implementation for Thirteen Sites in Yucaipa Basin Area

Dear Mr. Jones,

Thank you for contacting us regarding our proposal; included with this letter are the additional
information and schedules that you requested. Below are the clarifications that you requested:

Question 1:
Can you please provide us more detailed specs on the containers (i.e. what is the material, size of
containers side walls)?

Response to Question 1:
The proposed containerized infiltrometer would be based on a standard shipping container that
measures 40 ft. long by 8 ft wide and 8-1/2 high. These containers are constructed of
corrugated, sheet-steel walls and roof and contain beam supports for the floor. Our proposed
design would involve removing 35 ft of the floor and installing a sheet steel rectangular ring with
a 35 ft x 8 ft footprint and protruding 18 in. from the bottom of the container around this 35 ft x
8ft opening in the bottom of the container.

Water would be ponded approximately 3 ft inside the container with the front of the container
and two of the sides of the container serving as water-tight basin walls. A 4 ft-high by 8-ft wide
steel plate would be welded along the inside towards the back doors of the container to complete
the water-tight internal basin. There would be approximately 5 ft standing room inside the back
doors of the container where the instrumentation, piping and basin inlet valves would be
located. All equipment would be contained within the container and there would only be a water
connection flange on the outside of the container

GEOSCIENCE Support Services, Inc.
PO Box 220, Claremont, CA 91711 | 909.451.6650 | www.gssiwater.com
Yucaipa Groundwater Sustainability Agency - March 14, 2018 - Page 221 of 226