Sun Valley Water & Wastewater Project
Importation
The team used the water demand calculated in Table 1 to determine the amount of water that would need to be imported. As was mentioned in Section 3.1.1, the water supply will be imported from Holbrook to the Sun Valley Ranch. Holbrook’s water is potable and does meet all federal and state laws [1]. As was mentioned, a 1000 gallon storage tank will be used on the site for the imported water, but it will only be filled to 800 gallons. The team did not find a water storage tank that was above 625 gallons and below 1000 gallons during their research, and therefore they assume a standard 1000 gallon will be used. This portable water storage tank will be emptied into the 5000 gallon on-site water storage tank in Sun Valley. The on-site storage tank will only be filled to 4800 gallons. This process will require 5 trips to and from Sun Valley, and the on-site water storage tank will not be filled to its full capacity to save money on transportation costs. Although this is a frequent number of trips, the team did not find any other water importation transportation alternatives. There were no nearby water hauling services and all water hauling trucks were very expensive.
The weekly water demand, assuming that Sun Valley Ranch will have 10 residents, will be 3850 gallons. The water storage tank will be kept at about 900 gallons above the expected water demand to account for variances in water demand. The maintenance worker will fill up the on-site water storage tank 132 times on average per year. Near the end of October, the maintenance worker will stop filling the tank and let the remaining water be depleted before the system is shutdown for the off-seasons
Regulations
The regulations for hauled water were specified by ADEQ in the ADEQ’s Safe Drinking Water Regulation in Section R18-4-214. These general guidelines are provided below:
Requirements for the Water Supply
- The hauled water that will be delivered to a public water system must meets the standards for a regulated public water system.
- The materials, products, and chemicals that come into contact with the water must meet the standards specified by the National Sanitation Foundation/ American National Standards Institute. These organizations have declared regulations for treatment processes to regulate drinking water supplies [http://www.nsf.org/services/by-industry/water-wastewater/water-treatment-chemicals/nsf-ansi-standard-60/]
- The water hauler must maintain a residual free chlorine level of 0.2 mg/l- 1.0 mg/l in the water that is taken to the water transport container. Once the water is placed into the transport container, a chlorine disinfectant shall be added to the water. Each time the water is taken from the water transport container, the residual free chlorine level will shall be measured. The residual free chlorine level, along with the chlorine disinfectant, shall be recorded in a log for the water that is loaded into the water transport container. These records will be kept for at least three years and made available to ADEQ upon request.
Requirements for the Water Supply Container
- The hatches on the container containing the water supply must be well-fitted with a watertight cover.
- The container transporting the water shall be regularly cleaned and contain a bottom drain valve to allow for complete drainage. This water transport container shall only be used for drinking water and properly labeled “For Drinking Water Use Only.”
- The hoses use to deliver drinking water must be equipped with a cap and shall remain capped when not in use.
References:
[1] United States Environmental Protection Agency. (1999). Water Efficiency Technology Fact
Sheet: Composting Toilets. [Online]. Available FTP:
http://water.epa.gov/aboutow/owm/upload/2005_07_14_comp.pdf
