01/14/1998 - Packet INTERGOVERNMENTAL WATER BOARD MEETING
. ...........................
Serving Tigard, King City, Durham and Unincorporated Area
AGENDA
Wednesday, January 14, 1998
5:30 p.m.
1. Call to Order
2. Roll Call and Introductions
3. Long Term Water Supply Update
a. WWSA - Ed Wegner
b. Preliminary Engineering Report - Chris Uber, MSA
C. Willamette Pilot Treatment - Joe Glicker, Montgomery Watson
4. Director's Report
a. Menlor Update'
b. Department Update
5. Visitors Comments
6. Non Agenda Items
7. Adjournment
Executive Session: The Intergovernmental Water Board may go into Executive'
Session under the provisions of ORS 192.660 (1) (d), (e), & (h) to discuss labor
relations, real property transactions, and current and pending litigation issues. All
discussions within this session are confidential; therefore nothing from this meeting
may be disclosed by those present. Representatives of the news media are allowed to
attend this session, but must not disclose any information discussed during this session.
* A light dinner will be served 5:15 p.m.
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GUIDING PRINCIPLES FOR DEVELOPMENT
OF THE WILLAMETTE RIVER:
• Provide high quality drinking water
• Meet current and expected regulatory
requirements
• Meet public expectations for good taste, color and
odor of water
• Reasonable cost, and cost effective design
• Plant can be expanded to meet future needs
• Consistent with regional planning and
cooperation
DEVELOPMENT OF THE WILLAMETTE RIVER
AS A DRINKING WATER SUPPLY HAS
PROGRESSED SINCE 1992 :
• AWWARF Cyst Seeding Project ( 1992- 1993)
• TVWD Water Treatment Pilot Study ( 1993 - 1994)
• Raw Water Monitoring Program ( 1994 - 1996)
• WTP Siting Study- Canby Et Al . ( 1996)
• Wilsonville Water Supply Study ( 1997)
WHAT IS WATER TREATMENT?
WATER TREATMENT PROVIDES POTABLE WATER
THAT IS CHEMICALLY AND BIOLOGICALLY SAFE,
AND FREE FROM UNPLEASANT
TASTES AND ODORS
FPA Wheel
bacteria,
Giardia,
particles,
natural organic matter,
sOcs,
tastes & odors
CONVENTIONAL WATER TREATMENT PROCESS DIAGRAM
Raw
Water
— '17
-10.
Preoxidation: -
- chlorine hocculal ion o0 0 0
000 ". 0
Chemical Addition: _ o = -
-Alum Sedimentation —�
- polymers Filtration:
- anthracite coal To
- sand Users
- low rates Chlorine Contactor
WILLAMETTE PILOT STUDY FOSTERED
COOPERATIVE, REGIONAL APPROACH
- Pilot trailer and some lab
analyses supplied by
Portland Water Bureau
NT Pel pr P�pN T - Site provided by City of
WATER TAEATME Wilsonville
o
PORTLAND WATER WORKS
- OHD involvement
- major
Integrated with maj
g
AWWA Research
Foundation projects
PILOT TESTS BUILD SUPPORT
r
- - Demonstrate to regulators
ti
that standards will be met
Address public concerns
of health, aesthetics,
environment, cost
PILOT • , MISTAKES
Apply right level of
technology
Match to needs
Ensure that multiple goals
c be met
an
x v ryyy
r
r d'k
tY
t
F'r
PILOT TESTS SAVE
Investigate design options at
�y R. small scale, • I $$$
►� AVSfull-scale plant • •
PILOT STUDIES DEVELOPED AN OZONE -
GAC FILTER PROCESS TO MEET STRINGENT
WATER QUALITY GOALS
0
Raw
Water
Preoxidation:
I 1
- ozone '0
0 0
Chemical Addition: 0 00 0
Flocculation
- Ferric chloride Sedimentation
- polymer
Filtration:
- granular activated To
carbon (GAC) Users
- sand Chlorine Contactor
- moderate filtration
rates
WHAT DOES OZONE DO?
WATER QUALITY
Removes:
- Giardia & Cryptosporidium
- Pesticides
- Disinfection Byproducts
- Tastes and Odors
- Bacteria
COSTS
- Increases treatment costs
to achieve water quality
benefits
WHAT DOES OPTIMIZED FILTRATION DO?
WATER QUALITY
Removes:
- Turbidity
- Pesticides
- Tastes and Odors
- DBPs
COSTS
- Reduces capital costs by higher-rate, deeper filter design
CYST FILTRATION RESULTS
WITH OPTIMIZED PROCESS:
• 4-5 logs Giardia removal
• 5-6 logs Crypto removal
REQUIREMENTS:
• EPA assumes 2.5 logs Giardia removal
OPTIMIZED WATER TREATMENT PROCESS
Treatment costs comparable to other conven-
tional facilities, but ozone and GAC provide
additional water quality benefits
HOW GOOD IS THE WILLAMETTE RIVER?
WILLAMETTE RIVER MONITORING WAS
CONDUCTED FOR TWO REASONS :
• To verify that water quality conditions observed
during the pilot study were representative
• To address public concerns
WATERSHED FOR WILLAMETTE RIVER
IS A LARGE BASIN
• Basin covers 12% of
state
• 300 mile river length
• 70% of state population
4 ;s
resides within basin
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n.w rt
� • 70% forest land
• •..n••r•.
wo nr. wyru�.MiwwN
• 23% agriculture land
• 7% urban
INTAKE LOCATED IN RIVER SECTION
KNOWN AS NEWBERG POOL
RM 26.2
Tualatin River
co-11
1-*1 Mollala / Pudding River
• 30 mile, relatively flat,
Wilsonville — —
RM 38.0 depositional stream reach
RM 41.0 - Pilot Plant Site
• Median flow is 15,000 CFS
Smurfit Corp. _ _ _ RM 48.6 • 18 major dischargers
upstream
Yamhill River 1
10
RM 60.0
SAMPLING SCHEDULE
• Common water quality parameters measured
weekly or monthly
• Giardia/Crypto analyzed monthly
• Samples taken at low river flows (summer/early
fall)
• Samples taken at high river flows (fall/winter)
• Range of river conditions sampled :
9,000 - 154,000 CFS
SPECIAL EFFORT GIVEN TO
STORM SAMPLING
• 4 storms per year
• Caught "first-flush" event both years
• Above average rainfall in 1995 (+ 12%) and 1996
(+52%)
TABLE 1:
TUALATIN VALLEY WATER DISTRICT
WILLAMETTE RIVER RAW WATER MONITORING PLAN
ANALYTICAL SCHEDULE
SAMPLING METHOD
PARAMETER FREQUENCY LAB NUMBER DAYS SAMPLED
pH weekly on-site SM 4500-H+ Tuesdays
alkalinity weekly PWB Tuesdays
w
turbidity weekly on-site SM 2130 Tuesdays
temperature weekly on-site na Tuesdays
calcium hardness weekly PWB as per PWB Tuesdays
total hardness weekly PWB as per PWB Tuesdays
total organic carbon weekly PWB as per PWB Tuesdays
4 storms PWB 10/27/94,2/2/95,10/12/95&4/25/96
dissolved organic carbon monthly PWB as per PWB First Tuesday of Each Month
UV-254 absorbance weekly PWB as per PWB Tuesdays
4 storms PWB 10/27/94,2/2/95,10/12/95&4/25/96
total coliform weekly PWB as per PWB Tuesdays w
fecal coliform weekly PWB as per PWB Tuesdays
HK weekly PWB as per PWB Tuesdays
w
ammonia nitrogen monthly PWB as per PWB First Tuesday of Each Month
w�
Flavor Profile Analysis monthly PWB as per PWB First Tuesday of Each Month
7j 4 storms PWB 10127/94.2/2/95,10/12/95&4125/96
bromide monthly Montgomery Labs 300.0 9/13/94,6113/95.1215/95&625/96
1027194.22/95, 10/12/95&4125/96
Giardia monthly Montgomery Labs SM 9711 First Tuesday of Each Month
4 storms Montgomery Labs 10/27/94.2/2/95,10/12195&4125/96
Cryptosporidium monthly Montgomery Labs SM 9711 First Tuesday of Each Month
4 storms Montgomery Labs 10/27/94,2/2/95.10/12/95&412/5/96
Total Organic Halogens scmi-annual Montgomery Labs SM 5320B 9/13/94,6/13/95, 12/5/95&625/96
4 storms Montgomery Labs 1027/94,217195,10/12/95&4/25/96
Gross alpha/bcm semi-annual Montgomery Labs 900.0 9/13/94.6/13/95. 12/5/95&625/96
1
SAMPLING METHOD
PARAMETER FREQUENCY LAB NUMBER DAYS SAMPLED
VOCs semi-annual Montgomery Labs 542.2 9/13/94,6/13/95, 12/5/95&6/25/96
r�
(60 compounds) 4 storms Montgomery Labs 10127/94,2/1195, 10/12/95&425/96
Inorganic chemical semi-annual Montgomery Labs 200.71239.2/ 9/13/94.6/13/95,12/5/95&6/25/96
(9 memis+NO3/F) 4 storms Montgomery Labs 200.9/300 10/27/94,21119$,10/12/95&4/25/96
Zine semi-annual Montgomery Labs 200.7 9/13/94,6/13/95,1215/95&6/25/96
4 storms Montgomery Labs 10127/94,28195,10/12/95&425/96
EDB/DBCP semi-annual Montgomery Labs 504 9113/94,6113/95, 12/5/95&6/25/96
4 storms Montgomery Labs I0/27/94,211195, 10/12/95&4125/96
Organochlorine pesticides semi-annual Montgomery Labs 508 9/13/94,6113/95, 12/5/95&6125/96
(28 compounds) 4 storms Montgomery Labs 10/27/94,211195, 10/12/95&4/25/96
re-sample Montgomery Labs 10/4194
Semivolatiles by EPA 525 semi-annual Montgomery Labs 525.1 9/13/94,6/13/95, 1215/95&625/96
(50 compounds) 4 storms Montgomery Labs 10127/94,22195,10/12/95&425/96
Carbamates semi-annual Montgomery Labs 531.1 9/13/94,6/13/95,12/5/95&6125/96
(10 compounds) 4 storms Montgomery Labs 1027/94,22/95, 10/12/95&4125/96
Herbicides semi-annual Montgomery Labs 515.1 9/13/94,6/13/95, 12/5/95&625/96 ..+
(17 compounds) 4 storms Montgomery Labs 10/27/94,22/95, 10/12/95&4/25/96
Glyphosate semi-annual Montgomery Labs 547 9113/94,6113/95,12/5/95&6/25/96 ..�
4 storms Montgomery Labs 1027/94,2/2195,10/12/95&425/96
Dioxin semi-annual Montgomery Labs 1613 9/13/94,6/13/95, 12/5/95&625/96
4 storms Montgomery Labs 1027/94,211!95,10/12/95&4125/96
Endothall semi-annual Montgomery Labs 548.1 9/13/94,6/13/95,12/5/95'&625/96
4 storms Montgomery Labs 10/27/94,22/95,10/12/95&425/96
re-sample Montgomery Labs 7/5/95
Diquat semi-annual Montgomery Labs 549.1 9/13/94,6113/95,12/5195&625/96 ..
4 storms Montgomery Labs 10/27/94,22/95, 10/12/95&425/96
Note 1:All sampling performed at Wilsonville,OR
Note 2: Results are presented in Table 2 and Table 3.
1.
KEY INDICATORS OF WATER QUALITY
• Turbidity = measure of water cloudiness
• Coliform bacteria = pollution by warm-blooded
animals
• Giardia and Crypto = protozoan pathogens
• Flavor profile analysis = tastes and odors
• Hardness = measure of mineral content
• Total organic carbon = potential to form
disinfection by-products
• Synthetic organic chemicals = human pollutants
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WILLAMETTE RIVER HAS GOOD WATER
QUALITY AS MEASURED BY TURBIDITY
• Meets criteria for unfiltered supply for 6 months of
year
• Approaches Bull Run water in summer months
• Moderate turbidities in fall/winter
0 Extreme event in flood of `96
Figure 5:
Willamette River Water Quality - Turbidity
April 1994 to June 1996
50.0
—+—Turbidity at Wilsonville, Weekly from 4/94 to 6/96
45.0 Monthly Average Turbidity at Newberg, by ODCQ, 1982 to 1993 193 NTU on 4/25/96
40.0
35.0
a 30.0
H
25.0
b
H 20.0
15.0
10.0
1--i
5.0
0.0 �
4/l/94 6/3/94 8/5/94 10/7/94 12/9/94 2/11/95 4/15/95 6/17/95 8/19/95 10/21/95 12/24/95 2/25/96 4/28/96 6/30/96
.Date
If t f t t IUArA mMO ..MIA JAVAII_ _rte ---�
Figure 14:
Willamette River Water Quality - Total Coliform Bacteria
April 1994 to June 1996
10000
-+-Total Coliform at Wilsonville, Weekly from 4/94 to 6/96
Total Coliform at Newberg, by ODEQ, Monthly Average 1982 to 1993
1000
1~
SWTR MCL for unfiltered waters.
100
0
w
O
U N
' o
10
I
l
4/1194 6/3/94 8/5/94 l0/7/94 12/9/94 2/11/95 4/15/95 6/17/95 8/19/95 10/21/95 12/24/95 2/25/96 4/28/96 6/30/96
Date
I
TRA
Figure 15:
Willamette River Water Quality - Fecal Coliform Bacteria
10000
April 1994 to June 1996
—0 Fecal Coliform at Wilsonville, Weekly from 4/94 to 6/96
Fecal Coliform at Newberg, by ODEQ, Monthly Average 1982 to 1993
SWTR MCL for unfiltered waters.
1000 (20 colonies per 100 mL)
E 100
42
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10 • ♦
1
4/1/94 6/3/94 8/5/94 10/7/94 12/9/94 2/11/95 4/15/95 6/17/95 8/19/95 10/21/95 12/24/95 2/25/96 4/28/96 6/30/96
Date
GIARDIA AND CRYPTO
CONCENTRATIONS COMPARABLE
TO OTHER NORTHWEST WATERS
• Presumptive Crypto = 1 -44 Cysts/100 L
• No confirmed Crypto in 26 samples
• Presumptive Giardia = 1 -44 Cysts/100L
• 2 confirmed Giardia samples out of 26 samples
• National average for Crypto is around 100 Cysts/
100E
WILLAMETTE RIVER
IS "SOFT" WATER
• Water of 0-60 mg/L hardness are classified as
"soft"
• Willamette averages 25 mg/L, ranges from 20-30
mg/L
• Comparable to Clackamas, Trask rivers
• Bull Run ranges from 5- 10 mg/L hardness
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DETECTED ODORS CAN BE REMOVED BY
BOTH OZONE AND GAC
• "Earthy" odors are detected year-round, at low
levels
• "Fishy" and "woody" odors detected in summer
• Intensities are high enough to be .noticed by most
customers if not treated
• Probably occur due to algal activity
WILAMETTE RIVER
HAS GOOD WATER QUALITY AS MEASURED
BY TOTAL ORGANIC CARBON (TOC)
• Typical surface water in U . S . ranges from
0. 1 - 20 mg/L
• Willamette averages 2 . 1 mg/L, ranging from
1 -4 mg/L
• Bull Run ranges from 0 . 8 - 2 . 5 mg/L
WATER SAMPLES WERE ANALYZED FOR 760
REGULATED AND UNREGULATED
ORGANIC COMPOUNDS
• 6 out of 160 were detected
• 4 of the 6 are unregulated compounds, and were
Detected only one time, at levels slightly above
Detection limit
REGULATED COMPOUND " DEHP' WAS
DETECTED AT 16% OF TREATED WATER MCL
• DEHP was not detected in 1996
• Detected 2 times in 1995, at level slightly above
detection limit
• Common placticizing agent
• Could be contaminant from sample pump
REGULATED COMPOUND "ATRAZINE" WAS
DETECTED AT 10% OF TREATED WATER MCL
• Detected 3 times in 1995- 1996
• May be correlated with high river flows
• Commonly used herbicide in Willamette Basin
• Has been detected in tributaries of Willamette
PILOT STUDY ANTICIPATED
PRESENCE OF ATRAZINE, AND
DEMONSTRATED REMOVAL CAPABILITY
• Spike test simulated spill or episodic release Into
River
• Atrazine spiked into pilot plant raw water at 30
Times EPA standard
99.4-99.9% removed by treatment, even though
filters were at beginning of turbidity
"breakthrough"
• GAC filtration is commonly used in U . S. for
organic chemical removal
• Ozone provides an additional barrier
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DIOXIN WAS NOT DETECTED
IN 8 WATER SAMPLES
• Most stringent of all EPA standards
• By-product of chlorine bleaching of pulp/paper and
in wwtp
• Detected in some fish samples from lower river
• Strongly bound by sediment
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MONITORING RESULTS SUPPORT
MULTIPLE BARRIER RECOMMENDATIONS
• Ozone Removes:
- pathogens
- organic chemicals
- disinfection by-products
- tastes and odors
- bacteria
• Optimized GAC filtration removes:
- all of the above, plus turbidity
FUTURE MONITORING SHOULD FOCUS ON
PUBLIC CONCERNS
• Continue Synthetic Organics Sampling
• Add Sampling For Diuron , Heavily Used Herbicide
In Willamette Basin
• Continue To Look For Wet And Dry Season
Differences
• Continue Monthly Giardia And Crypto Sampling