2015 Drinking Water Supply Report
Idaho Department of Environmental Quality
Idaho Department of Environmental Quality
System: Parkview Water Association, Inc.
PWS#: ID1280135
County: Kootenai
Date of Survey: February 9, 2015
System Representatives Present at Survey: Charlie Tills, Board President
Surveyed by: Suzanne Scheidt, Analyst
Available Sources: Well 1
Primary Source: Ground Water
Water System Type: Community
Population: 90
Service Connections: 36 residential connections
A photographic log is enclosed with the narrative report.
System History and Overview:
The Parkview Water Association, Inc. (Association) was constructed in the late 1970s and was first inspected by Gary Gaffney, P.E., in 1983.
The well that currently supplies the system was drilled in 1976 by Carman Development. The Driller’s Report is on file and indicates the 6-inch cased well was drilled to a depth of 77 feet below ground surface (bgs) and constructed with an 18-foot puddling clay surface seal. The well was equipped with a Johnson Stainless screen slot size 15 from 67 to 77 feet. The lithologic log indicates the well was drilled through multiple layers of sand. A static water level was reported from 30 to 77 feet.
In 1996, the well was contaminated with nitrate levels exceeding the maximum contaminant level (10.0 mg/L). Idaho Department of Environmental Quality (DEQ) studies conducted by Brian Painter, P.G., attributed the source of contamination to disposal of overland flow in a shallow injection well at the Hughes Greenhouse. Nitrate sample results from water discharged to the dry well indicated concentrations in exceedance of 180 mg/L as referenced in Mr. Painter’s report. Upon learning of the nitrate ground water contamination, discharge to the shallow injection well was reportedly ceased. Nitrate levels in the well have consistently been below 2.0 mg/L since 2010.
The well, booster pumps, and reservoir are constructed on a 0.52 acre fenced lot owned by the Association and located at 12190 West Parkview Drive (Parcel Number 0-5820-002-005-0). South River Water Association’s well 1 is also located on this lot. The distribution system consists of looped 6-inch PVC main. Sodium hypochlorite injection is provided for voluntary chlorination of distribution components.
The system consists of one well discharging to the 30,000 gallon ground level concrete reservoir. A chlorine injection quill is installed in a vault between the well and the reservoir. The chlorineinjection system is equipped with an automatic flow cut off also installed in the vault. The well discharges to the east zone of the reservoir. Two booster pumps lift water from the west zone of the reservoir to pressurize the distribution system.
Parkview Water Association Overview
Source:
The well serving the system is equipped with a 3 horsepower submersible pump producing approximately 60 GPM, and is constructed with a downturned screened vent covered with 24-mesh screen. A raw water sample tap consisting of a frost free hydrant is installed approximately 10 feet from the well off the pitless adaptor. The hydrant installation was approved by DEQ following the 2005 sanitary survey. Well operation is regulated by floats in the reservoir.
The Idaho Department of Water Resources (IDWR) website indicates Water Right No. 95-9046 has been filed for the Association at a diversion rate of 0.29 cubic feet per second (cfs) or 130 gpm for domestic use and 0.16 cfs (71 gpm) for irrigation use (priority date 04/05/2000).
A designated mechanism to allow the well to discharge to waste will be required at the time of major material modification to the system in the future. At this time the well may be discharged to waste through isolation of the reservoir.
A source water assessment delineation report updated by DEQ in 2013 indicates a 0 to 3 year zone of influence to the well from both east and south directions. The report identifies the Spokane River, one shallow injection well, and major and minor roads within this zone.
The full report may be accessed at: http://www2.deq.idaho.gov/water/swaOnline/Search
The properties served by the Association utilize septic for wastewater disposal. Septic permits for the three properties bordering the well lot are enclosed for the Association’s records.
The well was evaluated in 1995 by DEQ for the potential for the source to be under the influence of the Spokane River. Potential influence was ruled out based on the proximity of the well to the Spokane River is in excess of 450 feet.
Reservoir, Booster Pumps and Hydropneumatic Tanks:
As previously indicated storage for the system is provided via a 30,000 gallon ground level concrete reservoir. The concrete reservoir lid has been covered with a watertight membrane. The reservoir overflow discharges in a manner to ensure drainage away from the reservoir and is covered with 24-mesh screen. A low reservoir level indicator light is provided outside the pump house building.
The reservoir may not be isolated to accommodate well to pressure. This may be required in the future should the system be subject to major material modification.
The well discharges via a pitless adaptor to the east zone of the reservoir floor. A fire connection also draws from this zone via a pipe penetration on the east reservoir wall. Two 5 hp Grundfos submersible pumps lift water from west reservoir zone discharging through the pump house to pressurize distribution and equipped with low reservoir cut off.
The booster pumps alternate only with pump control regulated by pressure switches (40 psi on – 60 psi off) on the discharge to distribution in the pump house. A finished water sample tap, flow meter and pressure gage are installed on the pump house discharge to distribution.
A pressure relief valve was installed following this survey; photos of the installation were provided and saved to the system file.
Eight hydropneumatic tanks absorb pressure transients and appeared to have bladders intact. Each tank may be isolated from the system and drained. Hose bibb drains were affixed with atmospheric vacuum breakers.
The pump house was found to be clean and well maintained. The building is protected from unauthorized entry and adequate heat and ventilation are provided.
Chlorination:
The Association provides voluntary chlorination of distribution components via sodium hypochlorite injection on the well discharge prior to the reservoir. While some disinfection contact time is achieved through this process it is not required. The single speed LMI electronic metering pump provides flow proportional injection as discharge rates from the well are not subject to fluctuation. The metering pump is installed with flooded suction. As previously described, the metering pump is equipped with an automatic flow cut off switch installed in the chlorine injection vault. The chlorine day tank was equipped with a screened vent outlet to atmosphere following the survey.
Mr. Tills submits monthly operating reports reflecting free chlorine residual levels collected twice per week from 12312 West Park Lane. It was discussed during the survey that a DPD color wheel is used for this purpose. As color wheel discs report to the tenths place, this allowance has been considered during Department review of the reports. Please make this correction to future submitted reports.
Distribution System:
The distribution system serves 36 residential connections via one 6-inch PVC loop serving properties on Parkway Drive and Parkview Lane. A 2-inch PVC main serves residential connections on Park Lane.
Water System Overview
Kootenai County Fire and Rescue regularly exercises the three fire hydrants installed on the 6-inch PVC main serving the system. Mr. Tills reports the local fire authority is aware of fire flow availability.
The Association Board has implemented a Cross Connection Control Program as required by the Idaho Rules for Public Drinking Water Systems. Underground sprinkler systems have been identified and annual testing of backflow prevention assemblies by a licensed backflow assembly tester is conducted. The Board offers testing at a discounted rate to users via an agreement with a licensed backflow assembly tester. Water users may also choose to have assemblies tested independently.
Monitoring Requirement Summary:
Source monitoring
Source water quality monitoring currently meets all regulatory drinking water standards. Nitrate levels from well 1 have consistently been below 2.0 mg/L since 2010. The maximum contaminant level (MCL) for nitrate in drinking water is 10.0 mg/L. Arsenic levels from the well 1 have been consistently below minimum laboratory detection limits over the last ten years.
Effective April 1, 2015, source water assessment monitoring for total coliform bacteria will be required. Samples must be collected monthly from the sample tap representative of the well and prior to chlorination injection, while the source is discharging to the reservoir. Monthly monitoring requirements will be re-evaluated following 12 months of monitoring results (approximately March 31, 2016).
Distribution monitoring
Lead and copper monitoring results from the last round of five samples collected in September 2014 indicated very low levels of lead (0.0012 to 0.0044 mg/L) and copper levels (0.0258 to 0.506 mg/L) in the drinking water supply. The action level for lead is 0.015 mg/L and for copper is 1.3 mg/L.
As a community water system, monthly monitoring for total coliform in distribution is required. The Association utilizes a coliform monitoring plan consisting of five rotating sampling locations representing the distribution system. A review of coliform sampling locations over the past year indicates coliform samples are collected in a manner which represents the entire distribution system.
Monitoring Requirements and Waivers
The table below lists the current Parkview Water Association monitoring requirements
The Parkview Water Association actively participates in DEQ’s monitoring waiver program. The following table summarizes the current monitoring waiver status for the well:
Management Capacity and Operator Certification:
The Association’s water system is classified as a Very Small Water System and is under the direct oversight of responsible charge licensed operator, Michael Hohensee. Mr. Hohensee holds a Distribution 1 (DWD1-18152) license. Jim Taccogna is listed as the operator for the system. Mr. Taccogna holds a Treatment 1 (DWT1-11627) license.
The Association is administered by a three member Board. Board members include: Charlie Tills, President; Tyler Stanley, Vice-President; and Tina Hunter, Secretary-Treasurer. Board meetings are held as needed and include Board members at large.
Rate Structure:
Service connections are not metered; water users pay a flat service fee of $40 per month.
Conclusion:
The Parkview Water Association was found to be operating in full compliance with the Idaho Rules for Public Drinking Water Systems. Please find listed below one additional requirement as well as recommendations which may assist the system in future operation.
Additional Requirement:
1. Effective April 1, 2015, source water assessment monitoring for total coliform bacteria will be required. Samples must be collected monthly from the sample tap representative of the well and prior to chlorination injection, while the source is discharging to the reservoir. Monthly monitoring requirements will be re-evaluated following 12 months of monitoring results (approximately March 31, 2016).
Recommendations:
1. It is recommended that all valves are exercised and all mains continue to be flushed annually.
2. It is recommended the water system continue to develop by laws or resolution under which the Association Board operates.
3. It is recommended meter readings from the well pump hourly meter and the booster pump discharge to distribution continue to be tracked. Usage would serve as an important diagnostic tool should the system be subject to leaks.
4. In the event energy savings improvements such as pump replacement or leak detection are necessary it is recommended the Association Board contact Layne McWilliams, P.E., with Energy Smart Industrial Program to discuss energy saving financial rebates available. Mr. McWilliams may be reached at 971-244-8581.
