BOARD01977

• Board Meeting Date: 3/20/2000
• Description: OWC Section - Water Conservation Planning Program - Evaporation-Transpiration Control Demonstration Project
• Board Meetings - Doc Type: Memo

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Proposed Northern Colorado Field Test
The field test we believe makes the most sense will involve up to six water utilities within
the Northern Colorado Water Conservancy District. who agree to purchase around 20
units and market them to a mix of large residential customers, multi family properties and
commercial and public accounts. Aquacraft will assist with the marketing by providing
information, developing target lists (based on water use records provided by the utility)
and screening potential customers. We can also receive phone or mail responses and
complete the sign up process. During this phase of the study the utility will pay all costs
for installing and operating the system, so we will want to demonstrate as large a water
savings as possible to justify the expense.

Aquacraft will install the ET Signal Controllers and program them as required. Aquacraft
will receive all calls from the customers with problems to report and will respond as
necessary. We will obtain as much billing data for each customer as is readily available
(in computer files) and we will measure the irrigated area of each site so that historic
application rates can be determined in inches or gpsf. We will track the operation of the
units over the year, determine the actual application rates and compare these to the
historical use to determine the quantity of water saved.

The following provides a description of the tasks required for each study site. It is
assumed that in each site 20, 12 station controllers will be placed in the field on
appropriate single family and multi-family accounts

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Task 1: Develop Participation Agreement and Target Lists

The first step will be to develop a formal participation agreement, which will spell out
what each customer will receive who participates in the project and what will be expected
of them in return. At the minimum the agreement will provide the ET controller, to keep,
and one year service free of charge. At the end of the year they may continue to
subscribe to the service at their cost (unless other arrangements have been made) or have
their old controller(s) replaced. During the year the operation of their systems will be
monitored and reports will be prepared on a monthly basis showing the current
application compared to the historical rates (as adjusted for weather). Any problems with
the ET Signal Control system will be corrected in a timely fashion by Aquacraft. Any
problems with the remainder of the irrigation system, such as broken or missing heads or
valves will be corrected promptly the owner. The owner will agree to not make any
adjustments or modification to the system during the test, and to inform Aquacraft of any
complaints or problems relating to irrigation.

Regarding target lists: ultimately, this system is intended to be used for all categories of
customers, but initially, the equipment is geared to residential applications with systems
containing 12 or less irrigation zones. Because many multi family sites would also have
compatible systems it is proposed to include multi-family and single family residences in
the initial field study. Participation from commercial and public acco.unts will be sought
on a case by case basis.

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