20190610DEQ Comments.pdf

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Subject:
Date:
Attachments:
Suzanne Scheidt
Suzanne Scheidt
FW: Inquiry - FYI - Gem State Water Company
Monday, June 10, 2019 3:05:48 PM
ID1280268 DIAMOND BAR ESTATES - FY15 ESS narrative 03-27-15.odf
RECEIVED
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From: Suzanne Scheidt
Sent: Monday, June 10,2019 2:43PM
To:'secreatary@puc. idaho.gov';'diane. han ian@puc. idaho.gov'
Cc: 'Mike Morrison'; Anna Moody
Subject: RE: Inquiry - FII - Gem State Water Company
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Good Afternoon [Vike,
As per our discussion earlier today, the Diamond Bar Water System, 1D1,280268 currently supplies 43
residential service connections. The system's approved configuration includes the emergency
source (well 2) as referenced in the attached survey report. As per system engineering approval, a
dedicated well lot needs to be created for the emergency source In the event Mr. Turnipseed sells or
transfers ownership of the property well 2 is situated on in the future.
As per the ldaho Rules for Public Drinking Water Systems, IDAPA 58.01.08.501.17. Ground Water
Source Redundancy. New community water systems served by ground water shall have a minimum
of two (2) sources if they are intended to serve more than twenty-five (25) connections or
equivalent dwelling units (EDUs). Under normal operating conditions, with any source out of service,
the remaining source(s) shall be capable of providing either the peak hour demand of the system or
a minimum of the maximum day demand plus equalization storage. See Subsection 501-.18 for
general design and redundancy requirements concerning fire flow capacity. (5-8-09)
Please email or call if you have questions
Suzanne Scheidt I Senior Drinking Water Analyst
ldaho Department of Environmental Quality
2110 lronwood Parkway, Coeur d'Alene, ldaho 83814
Direct: 208.666.4624
Office Line: 208.7 69.1422
http://www.deq. ida ho.gov/
Our mission is to protect human health and the quality of ldaho's air, land and water
2015 Drinking Water Supply Report
Idaho Department of Environmental Quality
RECEIVED
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:rrl,?ir*j##rhl8t'o*System: Diamond Bar Estates
PWS#: ID1280268
County: Kootenai
Date of Survey: March 5,2015
System Representatives Present at Survey: Robert Tumipseed, Responsible Charge Operator
Surveyed by: Suzanne Scheidt, Analyst
Available Sources: Well 1 (Primary), Well2 (Emergency)
Primary Source: Ground Water
Water System Type: Community
Population: 100
Service Connections: 43 residential connections
A photographic log is enclosed with the narrative report.
System History and Overview:
The Diamond Bar Estates water system (System) is classified as a community water system serving
43 residential connections. Engineering plans for the water system were submitted to the Idaho
Department of Environmental Quality (DEQ) by Jeff Block, P.E., on behalf of developer Robert
Tumipseed in September 1995. Water system plans including wells, reservoir and distribution main
serving the system were approved by DEQ in February 1996. While the water system was first
inspected in 1996; the population criteria of a community public drinking water supply was met in
2001.
In April 2003, ownership of the Diamond Bar Estates water system was transferred to the Diamond
Bar Estates, Limited Liability Corporation.
ln January 2005, plans submitted by Roger Glessner, CET were approved by DEQ for an S-main
extension from the 6-inch main on Atlas Road to serve the 14 lot Boekel Estates residential
subdivision on CJ Court.
The system consists of the primary and emergency well drawing from the Rathdrum Prairie Aquifer.
The primary well discharges to the 55,000 gallon concrete ground level reservoir via pitless adaptor;
the well is not plumbed to discharge to pressure. Under routine operation, two booster pumps
operating in lead/lag lift water from the reservoir to pressurize the distribution system. A third
booster pump provides fire flow. The well, booster pumps and reservoir are constructed on a l.l8
acre lot located at 13919 Rodeo Road. The lot is owned by Diamond Bar Estates, LLC (Parcel
Number 0-17 7 4-001-999-0).
The emergency well is drilled on a 59 acre lot (Parcel Number 5lN04W-03-3500) owned by Robert
Tumipseed on Atlas Road. The emergency well is plumbed to discharge to pressure via 6-inch Class
160 PVC main.
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The distribution system is looped with the exception of one 8-inch dead end main serving CJ Court
(Boekel Estates). Chlorination is neither required nor provided.
Diamond Bar Estates PWS Overview
Source Information
The Idaho Department of Water Resources (IDWR) website indicates the Systern has been allocated
two water rights shared between the wells with a priority date of November 29,1965. Water Right
No. 95-10068 provides for a municipal beneficial use of 2.7 cubic feet per second (cfs) or 1211 gpm.
Water Right No. 95-10067 provides an irrigation beneficial use between April I and October 31 with
diversion rate of 1.3 cfs or 583 gpm.
Setback distances from potential sources of contamination are met at the primary well.
A potential source of contamination to the emergency well is the Hayden Area Regional Sewer
Board's (HARSB) recycled water irrigation site which is located 430 feet west of the well. A
minimum buffer distance between a public drinking water well and irrigation site of 1,000 feet is
recommended in the Idaho Department of Environmental Quality's (DEQ) document titled
"Guidance for Reclamation and Reuse of Municipal and Industrial Wastewater, September 2007."
The guidance document also includes a recofirmended approach to evaluate the potential impacts to a
well when there is a reduced buffer distance. Using the recommended "Well Location Acceptability
Analysis" from the guidance for the irrigation of Class C recycled water at the HARSB irrigation site
and existing ground water quality data from the emergency well, the current well site location is
considered "acceptable" relative to the location of the irrigation site. Additional information on
ground water flow direction from a report titled "Well Sampling and Water Quality Evaluation, Date
Review, Proposed Monitoring Well Construction, and Data Collection Plan for the HARSB
Wastewater Land Application Site, October 16, 2006" prepared by Golder Associates indicates the
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CJ Court (dead end)
Emergency well
Well, pump house and reservoir
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ground water flow direction in the area of the HARSB irrigation site and emergency well is generally
from north-northeast to south-southwest. Therefore the emergency well would not be down gradient
from the HARSB irrigation site.
HARSB has been seasonally (May to September) irrigating recycled water on the site since
approximately 2003. The HARSB's system is currently operating in accordance with Reuse Permit
WRU-M-0109-04. Permit limits include seasonal agronomic hydraulic and nitrogen loading rates for
the alfalfa, oats, teff grass and poplars that are grown on the site. The disinfection requirements are
weekly total coliform testing and the following: the median number of total coliform organisms
cannot "exceed twenty three (23) per one hundred (100) milliliters, as determined from the
bacteriological results of the last five (5) days for which analyses have been completed". In addition,
'ono sample shall exceed two hundred and thirty (230) per one hundred (100) milliliters in any
confirmed sample." When the HARSB reuse permit is being renewed in 2017, there will be a
reevaluation of any potential impacts from the HARSB irrigation site to the emergency well. Copies
of any of the documentation referenced above are available upon request.
Source water assessment delineation reports for the primary and emergency well were completed by
DEQ in June 2013. The reports also indicate ground water flow to the wells from the north northeast.
Potential contaminants listed within the 0-3 year time of ground water travel zone include: NPDES
location (Castle Peak Construction), shallow injection wells, and major and minor roads. Potential
contaminants in the 3-6 year time of travel zone include RCRA site (Excel transport), the railroad,
and major and minor roads. Potential contaminants in the 6-10 year time of ground water travel zone
of the well include: underground storage tanks, remediation sites, shallow injection wells, CAMEO
chemical facilities, railroads and major and minor roads.
Individual reports for both sources may be accessed at:
http : //www2. deq . idaho. gov/rvater/srv aonl i nelS earch
Primary System: Well 1., Reservoir and Booster Pumps
The primary well that supplies the system was drilled in 1966 for irrigation use by Arnold Holman of
Holman Drilling Corporation, Spokane. The Driller's Report is on file and indicates the 16-inch
cased well was cable tool drilled to a depth of 373 feet below ground surface (bgs) and constructed
with a 94 foot bentonite surface seal. The well was equipped with a telescoping screen from 342 to
373 feet. The lithologic log indicates the well was drilled through multiple layers of sand, gravel and
boulders with a blue clay lens encountered between 324 and 332 feet. A static water level was
reported at 298 feet bgs.
The well, situated within the center of the fenced well lot, was converted from the original oil lubed
irrigation well and equipped with a 60 horsepower submersible pump producing approximately 570
GPM. A screened mushroom cap vent is installed off the well cap.
The well discharges via pitless adaptor through the pump house to the 55,000 gallon partially buried
concrete reservoir. A call for water from the well is generated from the float system installed in the
reservoir.
The pitless adaptor enters through the reservoir floor via 4-inch galvanized main with valving to
isolate the reservoir from well discharge to waste. A Kent instantaneous and totalizing flow meter
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and smooth nose raw water sample tap are installed on the 4-inch galvanized line prior to discharge
to the reservoir.
The 55,000 gallon concrete reservoir is constructed below the pump house. The reservoir was
constructed with a partial baffle wall between the well discharge and booster pump suction lines for
structural support of pump house components. The reservoir access hatch is located within the
locked pump house and must be equipped with an internal gasket. An adequately screened combined
overflow and vent is installed. In the event major modification to water system components are
completed in the future or the reservoir should be subject to contamination, a separate vent must be
installed and the reservoir overflow must be reconfigured with a downturned screened elbow or
weighted flapper valve with expandable mesh at the outlet. A low level reservoir indicator light is
installed on the west outer wall of the pump house. Pump house floor drains are plumbed to
discharge through the reservoir via the front of the building.
Three suction lines equipped with submersible pumps draw from the reservoir to pressurize
distribution. Two l0 hp submersible pumps operating in lead/lag lift water from the reservoir to
pressurize distribution under normal operation. The pumps operate off pressure switches on the
discharge to distribution. Switches indicate booster pump 1 operates off a 40160 psi setting while
booster pump 2 operates off a 38/60 psi setting. Booster pump 3, the 20 hp fire pump operates off a
35160 psi switch to provide for fire flow. A secondary flow meter is not installed on the booster
pump discharge to distribution. A pressure relief valve is installed in proximity to the pressure
switches.
Five 119 gallon Well Xtrol hydropneumatic bladder tanks ride on the booster pump discharge to
distribution. The bladder in tank number four was found to have failed and will require replacement.
Each tank may be isolated and drain. Threaded hose bibb drains are equipped with atmospheric
vacuum breakers. A second sample tap is available downstream of the reservoir and hydropneumatic
tanks.
Emergency Source (Welt #2) and Appurtenances
As previously indicated, the emergency back up S-inch cased well is located approximately 2,300
feet west northwest of the primary well on private property. The well is the primary source saving
the Tumipseed private residential property and provides an emergency back-up source for the
Diamond Bar Estates system.
Previous survey reports indicate a dedicated well lot needs to be created for the well in the event Mr.
Turnipseed sells or tansfers ownership of the property. A Driller's Report is not available for the
well; however a pump installation report by Dickerson Pump and Irrigation Company (1990)
indicates the 8-inch cased well was drilled by Hollman Drilling Corporation to a completed depth of
373 feet in 1975. A static water level of 295 feet was indicated on the Dickerson report.
The well is enclosed within the locked, heated and ventilated pump house. The well is reportedly
equipped with a 15 hp submersible Berkeley pump; the well pump curve provided by Rich Agueros
at United Crown Pump and Drilling indicates a maximum production rate of 95 gpm.
The well discharges off the well cap through a 2-inch galvanized water line. A pressure relief valve
is installed off well discharge from the well cap. A check valve installed downstream of the pressure
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relief valve may preclude distribution pressure relief through the valve. It may be possible to install a
downtumed screened vent on the outer perimeter of the well cap to allow air to enter and exit the well
casing upon well start up and shut down. The addition of a vent will protect the well from potential
contamination by minimizing air flow through the electrical conduit. In the event the well is utilized
in the future as a primary source to serve the Diamond Bar system, adequate venting of the well
would be required.
A smooth nose sample tap is installed immediately off well discharge in the pump house. A 2-inch
galvanized tee discharges through an instantaneous and totalizing flow meter to supply the residential
connection. The 600 gallon Welk hydropneumatic tank rides on the residential connection. In the
event it becomes necessary for the source to supply the Diamond Bar Estates system, the operator
may open the manual isolation valve downstream of this hydropneumatic tank. A second
instantaneous and totalizing flow meter is installed prior to the discharge to Diamond Bar Estates
distribution system.
Well operation is controlled by pressure switches installed off the 600 gallon hydropneumatic tank.
The tank appeared to be structurally sound with water levels monitored via sight glass. A pressure
gage was installed off the tank and read 60 psi at the time of the survey. The tank is equipped with a
pressure relief valve. Air to the tank is supplied by an electric compressor. The original air supply to
the tank was piped through an air filter from the shop. While still plumbed, the line has been valved
from the system.
Responsible Charge Operator, Robert Tumipseed indicated that there are no unprotected cross
connections at the primary residence.
Distribution System
The distribution system seryes 45 metered residential connections. Water mains are constructed of 6-
and S-inch Class 160 PVC pipe. Mains provide service to Diamond Bar Avenue, Ramsey Road
(between Diamond Bar Avenue and Boekel Road), and Atlas Road from Boekel to the main loop on
Rodeo Road. A 6-inch Class 160 PVC main runs north on Atlas under Boekel Road to supply CJ
Court (Boekel Estate) via an 8-inch Class 160 PVC main. A flushing hydrant is installed at the end
of this S-inch main and is flushed at least twice per year.
According to Tyler Drecshel, Fire Inspector with Northem Lakes Fire District, the water system
meets fire flow requirements.
Cross Connection Control
Diamond Bar Estates initiated a Cross Connection Control Program in June of 2004. The program
includes inspections of services to evaluate potential cross connections, installation of adequate and
suitable backflow protection, annual testing of backflow assemblies by a licensed backflow assembly
tester and discontinuance of service where adequate backflow protection is not available. Annual
backflow test reports are tracked and reviewed by the water system as required.
Idaho Rules goveming cross connection control for community water systems were updated in 2013
to include: assemblies not passing annual backflow assembly tests or found to be defective shall be
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repaired, replaced or isolated within 10 business days or water service to the failed assembly shall be
discontinued as per IDAPA 58.01.08.552.06.e.
Monitoring Requirement Summary
Monitoring Requirements and Waivers
The table below lists the current System monitoring requirements:
Sample Type Frequency Sample Location
Distribution Monitoring Requirements
Total coliform 1 sample per month Distribution
Lead and Copper 5 samples per 3 years Distribution
Source Monitoring Requirements (Well #1)
Nitrate I sample per year
Nitrite I sample per 9 years
Alpha 1 sample per 9 years
Radium 226 1 sample per 9 years
Radium 228 1 sample per 9 years
Uranium 1 sample per 9 years
Arsenic 1 sample per 9 years
Sodium I sample per 3 years
Fluoride 1 sample per 9 years
Inorganic Contaminants I sample per 9 years
Volatile Organic Contaminants I sample per 6 years
Source Monitoring Requirements (Emergency WeIl #2)
Nitrate 1 sample per year
Nitrite 1 sample per 9 years
Total Coliform At time well brought on
line to serve system
Diamond Bar Estates actively participates in DEQ's monitoring waiver program. The following
table summarizes the current waiver status for Well #1:
Contaminant Next Monitoring Due Waiver Renewal Duration
IOCs tzl3l20t9 r2l3y20t9 9 year
Cyanide none this period 12t3y2019 9 year
VOCs 12t31t20t9 12l3y20t9 6 year
SOCs none this period 12t3U20r6 3 year
Dioxin none this period t2l3v20r6 3 year
Source monitoring results summary
Source water quality monitoring currently meets all regulatory drinking water standards. Nitrate
levels from well #1 have consistently ranged below 1.3 mlL over the last ten years. The maximum
contaminant level (MCL) for nitrate in drinking water is 10.0 mg/L. Nitrate levels from the
emergency well #2 have ranged between 1.0 and 3.9 mglL over the last ten years. Arsenic levels
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from the wells have been consistently below minimum laboratory detection limits over the last ten
years.
Distribution monitoring results summary
Lead and copper monitoring results from the last round of five samples collected in August 2013
indicated very low levels of lead (0.0013 to 0.0035 mglL) and copper (0.0315 to 0.0919 mglL) in the
drinking water supply. The action level for lead is 0.015 mdL and for copper is 1.3 mgll..
As a community water system, monthly monitoring for total coliform in distribution is required. The
system 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 from four locations on the distribution system: 1900 West Boekel
Road, 1798 West Boekel Road, 1990 West Boekel Road, and 2961 Diamond Bar Road. The
sampling plan is representative of the distribution system served.
The Idaho Rules for Public Drinking Water Systems have been updated since the time of the last
sanitary survey with regard to distribution depressurization response. As per current Rule, during
unplanned or emergency situations, when water pressure within the system is known to have
decreased below 20 psi, the water supplier must notifr DEQ, provide public notice to affected
customers within 24 hours and flush and/or disinfect the system. When sampling and corrective
procedures have been conducted, the water supplier may re-notiff the affected customers that water
is safe for consumption.
Management Capacity and Operator Certification
The Diamond Bar water system is classified as a Very Small Water Systern and is under the direct
oversight of responsible charge licensed operator, Robert C. Turnipseed who holds a Very Small
Water System license (DWDVSWS-I2219). Robert N. Turnipseed is also listed as the operator of
record for the system and holds a Very Small Water System license (DWDVSWS-12209GP).
The water system is privately owned and operated by the Diamond Bar Estates Limited Liability
Corporation.
Rate Structure
The water system charges a metered rate of $29.00 per month for up to 55,000 gallons. Additional
usage is billed at arate of $0.80 per 1,000 gallons.
Conclusion
The water system was found to be operated in full compliance with the Idaho Rules for Public
Drinking Water Systems. Please find listed below additional requirements as well as
recommendations which may assist the system in future operation.
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Additional Requirements
1. One of the hydropneumatic bladder tanks located in the pump house of the primary systern
has failed and must be replaced.
2. An intemal water tight gasket must be installed on the reservoir hatch.
3. The 8-inch dead end main serving CJ Court must continue to be flushed at a minimum
frequency of twice per year.
4. During unplanned or emergency situations, when water pressure within the system is known
to have decreased below 20 psi, the water supplier must notifu DEQ, provide public notice to
affected customers within 24 hours and flush and/or disinfect the systern. When sampling and
corrective procedures have been conducted and after determination by the Department that
the water is safe, the water supplier may re-notify the affected customers that water is safe for
consumption.
Recommendations
1. It is recommended that all valves are exercised and all mains are flushed annually.2. It is recommended that totalizing meter readings reflecting primary well use continue to be
tracked as a mechanism to track water system leakage.
3. In the event energy savings improvements such as pump replacement or leak detection are
necessary in the future, it is recommended the water system contact Layne McWilliams, P.E.
with Energy Smart Industrial Program to discuss energy savings financial rebates available to
the system. Mr. McWilliams may be reached at97l-244-8581.
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