carr post-fire surface water quality assessment · carr post-fire surface water quality assessment...
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CARR POST-FIRESURFACE WATER QUALITY ASSESSMENT A review of ongoing Central Valley Water Board surface water quality monitoring activities.
Lynn CosterSenior Environmental Scientist
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PRESENTATIONCarr Fire FactsAssessment of Impacts and Water
Quality ThreatsWater Quality Monitoring StrategyMonitoring ResultsNext Steps
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July 23 - August 30, 2018.Cause: Rim of trailer tire.Highway 299 near Whiskeytown NP, west of
Redding.~230,000 acres; ~1,100 homes; 8 deaths.“Fire Whirl” with 143 mph winds, 18,000 feet high.State and Federal emergency declarations.
CARR FIRE FACTS
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Hazardous WasteFacilities (Regulated and Unregulated)Municipal Storm Water (City and County)Nonpoint SourceGIS & Data Management
ASSESSMENT ACTIVITIES
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GEOGRAPHIC INFORMATION SYSTEM
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AGENCY COORDINATION
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Provide data on post-fire impacts to water quality Protect Beneficial Uses (drinking water, aquatic life) Assess effectiveness of post-fire mitigation actions
WATER QUALITYMONITORING PROGRAM
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Known post-fire pollutantsPesticide Use Data303d Impaired WatersCEDEN pre-fire data
SELECTION OFMONITORING CONSTITUENTS
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NutrientsMetals – total &
dissolvedOrganics (PAHs)General Chemistry Field Parameters
WATER QUALITY MONITORINGPARAMETERS
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Pre-storm “Baseline”Four or more subsequent storm events
Storm Event:Predicted rainfall ≥ 1 inch in 24-hours
WATER QUALITY MONITORINGFREQUENCY
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Elevated turbidityElevated aluminum and iron
RESULTS
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Other Constituents: No significant change from baseline
RESULTS
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Data provided to water purveyorsData used to help prioritize
watersheds for $8.4M post-fire mitigation project
WHAT DID WE DO WITH THE RESULTS?
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Monitor storm event – Fall 2019Obtain funds for sediment toxicity
monitoring
NEXT STEPS
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Difficult to predict weatherSampling CoordinationLab coordinationImpact on staff resources
CHALLENGES
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Provide data to publicProvide information for statewide emergency
response plan
GOALS