oltac meeting - oct. 31, 20121 upstate freshwater institute
TRANSCRIPT
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UPSTATEUPSTATEFRESHWATERFRESHWATERINSTITUTEINSTITUTE
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Summer average TP = 20 µg/L
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minor bloom> 15 µg/L
Summer average Chl-a = 6.5 µg/L
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summer average = 2.0 meters
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Nitrate – hypolimnetic compositeSoluble reactive phosphorus – 15 meter sample
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Percent of monthly geometric means <200 cfu/100ml
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Metro 81% (N=21)
Willow Bay 100% (N=20)
Harbor Brk 84% (N=19)
Ley Crk 86% (N=21)
Ninemile Crk 95% (N=20)
Maple Bay 100% (N=20)
Bloody Brk 95% (N=20)
Onondaga Lake Park 100% (N=20)
Wastebeds 100% (N=20)
Onondaga Crk 50% (N=20)
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Metro 001 Outfall was in full compliance with ammonia and phosphorus limits
Tributaries were largely in compliance with AWQS, with the following noteworthy exceptions: Excursions of the standard for fecal coliform bacteria were
widespread Water quality standards for pH, ammonia, and nitrite were
exceeded at Allied East Flume Water quality conditions at South Deep met most standards,
with the following exceptions: Dissolved oxygen in the lower waters Total dissolved solids Nitrite (at 12 meters on 2 dates)
The standard for fecal coliform bacteria was exceeded at a single nearshore sampling site near the mouth of Onondaga Creek
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Meteorological ConditionsMeteorological Conditions
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0
1
2
3
4
5
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mon
thly
Tot
alPr
ecip
itatio
n (in
ches
)
NOAA 30-yr Average (1981-2010) Monthly 2012 NOAA
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Total Phosphorus and Total Phosphorus and Chlorophyll-Chlorophyll-aa Concentrations in Concentrations in
the Upper Watersthe Upper Waters
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Summer average = 21 µg/L(to date)
Summer average = 5.2 µg/L(to date)
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Compliance with SPDES Compliance with SPDES Permit LimitsPermit Limits
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0.120.1
0.00
0.05
0.10
0.15
0.20
0.25
0.30
1 5 9 1 5 9 1 5 9 1 5 9 1 5 9 1 5 9 1 5 9
Conc
entr
ation
(mg/
L)
Month
Metro effluent levels prior torolling average limitimplementationMetro effluent - Rolling averagelimit (0.12) in effect
Metro effluent - Rolling averagelimit (0.10) in effect
Start calculation for rollingaverage
Start compliance for rollingaverage
Target limit
2006 2007 2008 2009 2010 2011 2012
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Secchi Disk TransparencySecchi Disk Transparency
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Summer average = 2.0 m(to date)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Jan Feb Mar Apr May Jun Jul Aug Sep
Dep
th (m
)
2012
Aesthetic Guidance Value (red line):1.5 m June 1 to September 30
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Dissolved Oxygen PatternsDissolved Oxygen Patterns
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2012
Jan Feb Mar Apr May Jun Jul Aug Sep
Diss
olve
d O
xyge
n (m
g/L)
0
5
10
15
20
0 m3 m6 m9 m12 m15 m18 m
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Regulation of Sediment P Regulation of Sediment P Release by NitrateRelease by Nitrate
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NO
3- (mg/
L)
0
1
2
3
4
Year
00 01 02 03 04 05 06 07 08 09 10 11 12
SRP
(mg/
L)
0.0
0.2
0.4
0.6
0.8
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Assessing Compliance with the Assessing Compliance with the AWQSAWQS
for Fecal Coliform Bacteriafor Fecal Coliform Bacteria
Percent of monthly geometric means <200 cfu/100ml(April-August 2012)
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Assessing Compliance with Assessing Compliance with thethe
Swimming Safety Guidance Swimming Safety Guidance ValueValue
(Secchi disk >4 ft. or 1.2 m)(Secchi disk >4 ft. or 1.2 m)
OLTAC Meeting - Oct. 31, 2012 31April-August 2012
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Time Series of Specific Time Series of Specific ConductanceConductance
- 2012 Values Versus 10-- 2012 Values Versus 10-Year AverageYear Average
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2012
Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Onondaga Lake: South Deep Daily Averaged Specific Conductance
Spec
ific
Cond
ucta
nce
(µS/
cm)
1500
2000
2500
3000
EpilimnionHypolimnion10 Year Epi Average10 Year Hypo Average
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Chloride and Total Dissolved Chloride and Total Dissolved Solids Concentrations in the Solids Concentrations in the
Metro EffluentMetro Effluent
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2012
Chlo
ride
(mg/
L)
0
500
1000
1500
2000
2500
3000
Jan Feb Mar Apr May Jun Jul Aug Sep
TDS
(mg/
L)
0
1000
2000
3000
4000
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Color Contours of Specific Color Contours of Specific Conductance and Nitrate - Near Conductance and Nitrate - Near
the Metro Outfallthe Metro OutfallSite 47: Specific Conductance
Jul Aug Sep Oct
Dept
h (m
)
0
2
4
6
8
10
12
14
1800 2100 2400 2700 3000 3300 3600
Specific Conductance (µS/cm)
Site 47: Nitrate
2012
Jul Aug Sep Oct
Dept
h (m
)
0
2
4
6
8
10
12
14
0 1 2 3 4 5 6
Nitrate(mg/L)
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Color Contours of Specific Color Contours of Specific Conductance and Nitrate - at Conductance and Nitrate - at
South DeepSouth DeepSite 11: Specific Conductance
Apr May Jun Jul Aug Sep Oct
Dept
h (m
)
02468
1012141618
1800 2100 2400 2700 3000
Specific Conductance (µs/cm)
Site 11: Nitrate
2012
Apr May Jun Jul Aug Sep Oct
Dept
h (m
)
02468
1012141618
0 1 2 3 4
Nitrate(mg/L)
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Recent Vertical Profiles at Recent Vertical Profiles at South DeepSouth Deep
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Time Series of Fecal Coliform Time Series of Fecal Coliform Counts in Onondaga Creek, 1998-Counts in Onondaga Creek, 1998-
20112011
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Year
98 99 00 01 02 03 04 05 06 07 08 09 10 11 12
Fec
al c
olifo
rms
(cou
nt/1
00m
L)
1
10
100
1000
10000
100000
1000000
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Annual Average Fecal Coliform Annual Average Fecal Coliform CountsCounts
- Onondaga Creek- Onondaga Creek
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10
100
1000
10000
100000(a) all data
Fe
cal c
olif
orm
s (c
ou
nt/1
00
mL
)
10
100
1000
10000
(b) dry weather
1998 2000 2002 2004 2006 2008 2010 2012
10
100
1000
10000
(c) wet weather
R2 = 0.19p = 0.12slope = -4%
R2 = 0.17p = 0.14slope = -3%
R2 = 0.13p = 0.21slope = -4%
Dry weather defined as less than 0.08 inches of rainfall over the preceding 60 hours
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Trend analysis is complicated by extreme temporal variability (>5 orders of magnitude), uneven intensity of sampling, and potential effects from multiple management actions (gray and green infrastructure projects)
A more rigorous analysis will be included in the 2012 AMP Report 1998-2012 data: Onondaga Creek, Harbor Brook, Ley Creek,
Ninemile Creek Conduct power analyses to establish realistic expectations Consider trends other than monotonic trends (e.g., step
changes) Assess seasonal variations Look at alternate thresholds for dry and wet weather conditions Explore potential covariates (e.g., flow, temperature,
phosphorus)
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Appropriate application of the AWQS for fecal coliform bacteria Sampling frequency Wet weather samples
NYSDEC Water Quality Standard for Fecal Coliforms:
“The monthly geometric mean, from a minimum of five examinations, shall not exceed 200 per 100 mL”