OLTAC Meeting - Oct. 31, UPSTATE FRESHWATER INSTITUTE

OLTAC Meeting - Oct. 31, 20122

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OLTAC Meeting - Oct. 31, Summer average TP = 20 µg/L

OLTAC Meeting - Oct. 31, minor bloom > 15 µg/L Summer average Chl-a = 6.5 µg/L

OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31, summer average = 2.0 meters

OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31, Nitrate – hypolimnetic composite Soluble reactive phosphorus – 15 meter sample

OLTAC Meeting - Oct. 31, Percent of monthly geometric means <200 cfu/100ml

OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31,  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

OLTAC Meeting - Oct. 31,

Meteorological Conditions OLTAC Meeting - Oct. 31,

Total Phosphorus and Chlorophyll-a Concentrations in the Upper Waters OLTAC Meeting - Oct. 31, Summer average = 21 µg/L (to date) Summer average = 5.2 µg/L (to date)

Compliance with SPDES Permit Limits OLTAC Meeting - Oct. 31,

Secchi Disk Transparency OLTAC Meeting - Oct. 31, Summer average = 2.0 m (to date)

Dissolved Oxygen Patterns OLTAC Meeting - Oct. 31,

Regulation of Sediment P Release by Nitrate OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31, Assessing Compliance with the AWQS for Fecal Coliform Bacteria Percent of monthly geometric means <200 cfu/100ml (April-August 2012)

Assessing Compliance with the Swimming Safety Guidance Value (Secchi disk >4 ft. or 1.2 m) OLTAC Meeting - Oct. 31, April-August 2012

Time Series of Specific Conductance Values Versus 10-Year Average OLTAC Meeting - Oct. 31,

Chloride and Total Dissolved Solids Concentrations in the Metro Effluent OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31, Color Contours of Specific Conductance and Nitrate - Near the Metro Outfall

OLTAC Meeting - Oct. 31, Color Contours of Specific Conductance and Nitrate - at South Deep

Recent Vertical Profiles at South Deep OLTAC Meeting - Oct. 31,

OLTAC Meeting - Oct. 31,

Time Series of Fecal Coliform Counts in Onondaga Creek, OLTAC Meeting - Oct. 31,

Annual Average Fecal Coliform Counts - Onondaga Creek OLTAC Meeting - Oct. 31, Dry weather defined as less than 0.08 inches of rainfall over the preceding 60 hours

OLTAC Meeting - Oct. 31,  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  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)

OLTAC Meeting - Oct. 31,  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”