First Flush 2014: Midcoast Storm Drains Presentation to: SMC RCD Board of Directors March 19 th 2015
What is First Flush? First big rain of the • season Freshwater runoff- • storm drains October 31 st 2014 Most polluted • stormwater Sampled at outfall • before ocean San Mateo County Resource Conservation District
Partners San Mateo County Resource Conservation District
2014 Sample Sites San Mateo County Resource Conservation District
2014 Sample Sites *202-MOSD-01: 7 th Street 202-MOSD-02: Vallemar Street 202-MBSD-01: Weinke Way 202-MBSD-05: San Vicente Creek Mouth *202-PPSD-01: Mavericks 202-MBSD-04: West Point 202-EGSD-04: Vassar Street 202-PPSD-02: Columbus Avenue 202-PPSD-03: Denniston Creek 202-EGSD-03: Capistrano Steet 202-PPSD-04: St. Augustine 202-PPSD-05: Inner Harbor parking lot *202-PPSD-06: Inner Harbor cleaning station 202-PPSD-07: Harbor upland *202-PPSD-08: Harbor ramp 202-PPSD-09: Deer Creek 202-EGSD-01: El Granada 202-EGSD-02: Surfers Beach * Outfall not flowing-no data for 2014 San Mateo County Resource Conservation District
What are we testing? Bacteria ( E. coli , • Enterococcus, Total Coliforms) Nutrients (nitrate, • orthophosphate, urea, ammonia) Metals (zinc, lead, • copper) Total Suspended • Solids, Hardness San Mateo County Resource Conservation District
Field Tests • Transparency-daylight hours only • pH • Electrical conductivity • Water temperature • Observations: trash, odor, bubbles, scum, oil San Mateo County Resource Conservation District
Train and Mobilize Volunteers San Mateo County Resource Conservation District
Data Analysis Dry Run vs. First Flush 14 SMC sites in 2014 9 were historic sites (2008-2014) – Analyzed over time – Compared locations – Note: No data for 2013 in SMC Other counties have data since 2000 Water Quality Objectives (WQOs) San Mateo County Resource Conservation District
Dry Run vs First Flush 202-MBSD-05: San Vicente Creek Mouth Parameter Dry Run First Flush E. Coli 6,867 24,196 Entercoccus 4,884 15,531 NO 3 -N 1.0 0.3 E. Coli: Highest dry run O-PO 4 -P 0 1.69 concentration in 2014 Urea 10 32 Copper 0.44 11 Lead 0 8 Zinc 14 147 TSS 3 378 San Mateo County Resource Conservation District
E. coli 2014 WQO<235 MPN/100 mL Detection Limit: 24,196 MPN/100 mL San Mateo County Resource Conservation District
E. Coli over time WQO<235 MPN/100 mL Detection Limit: 24,196 MPN/100 mL *Note data in 2008 and 2009 were adjusted to current Detection Limit San Mateo County Resource Conservation District
E. Coli Location Comparison E.� coli :� San� Mateo� and� Santa� Cruz� County� 2001-2014� 300000� WQO< 235 MPN/100 mL 250000� Median� 200000� ml� 100� 150000� MPN/� 100000� 50000� 0� Street-DR� Street-FF� Vallemar-DR� Vallemar-FF� Way-DR� Way-FF� Creek� Creek� Point-DR� Point-FF� Vassar-DR� Vassar-FF� � SD-DR� � SD-FF� South-DR� South-FF� Bay-DR� Bay-FF� Seco-DR� Woodrow-DR� Seco-FF� Woodrow-FF� Merced-DR� Merced-FF� Ave-DR� Simpkins-DR� Ave-FF� Simpkins-FF� 38th-DR� 38th-FF� Plaza-DR� Plaza-FF� Center-DR� Center-FF� Plaza-DR� Plaza-FF� Ave-DR� Ave-FF� Pier-DR� Pier-FF� Upper-DR� Upper-FF� Mid-DR� Mid-FF� Seacliff-DR� Seacliff-FF� � � � � mouth- mouth- Spreckles- Spreckles- � � Street-DR� Street-FF� Vicente� Vicente� Granada� Granada� 30th� Monterey� 30th� Monterey� Cap� -� Weinke� Arroyo� &� Cap� -� Creek� Creek� Weinke� West� Arroyo� &� Auto� Creekside� Creek� Surfer's� Auto� Creekside� 7th� West� -� Creek� 7th� Surfer's� Brommer� Cap� -� Brommer� Cap� Creekside� Moosehead� Moosehead� Capistrano� Creekside� Capistrano� Soquel� Soquel� San� San� El� Soquel� Soquel� El� Sites� *Note all data in San Mateo County except 2008 and 2009 has a detection limit at 24,196 MPN/100 mL San Mateo County Resource Conservation District
Enterococcus 2014 WQO<104 MPN/100 mL. Detection Limit: 24,196 MPN/100 mL San Mateo County Resource Conservation District
Enterococcus over time San Mateo County Resource Conservation District
MPN/� 100� ml� San Mateo County Resource Conservation District 100000� 150000� 200000� 250000� 300000� 7th� 50000� Street-DR� 7th� 0� Enterococcus Location Comparison Street-FF� Vallemar-DR� Vallemar-FF� Weinke� San� Weinke� San� Vicente� Way-DR� San� Vicente� San� Vicente� Way-FF� Ou all-DR� Vicente� Creek� Ou all-FF� *Note all data in San Mateo County except 2008 and 2009 has a detection limit at 24,196 MPN/100 mL Creek� Mouth-DR� Mouth-FF� West� West� Point-DR� Enterococcus:� Point-FF� Capistrano� Vassar-DR� Capistrano� Vassar-FF� Street-DR� El� Street-FF� Granada� El� � � � � Granada� Surfer's� � SD-DR� � � � Surfer's� SD-FF� � South-DR� San� South-FF� Mateo� Bay-DR� Arroyo� Bay-FF� Arroyo� Seco-DR� Woodrow-DR� Seco-FF� and� Woodrow-FF� Merced-DR� Santa� Merced-FF� Sites� 30th� Ave-DR� 30th� Cruz� Simpkins-DR� Ave-FF� Brommer� Simpkins-FF� Brommer� Coun es� &� 38th-DR� &� 38th-FF� Auto� Plaza-DR� Auto� Cap� Plaza-FF� Center-DR� 2006� Creekside� Cap� Center-FF� Creekside� Plaza-DR� Monterey� -� Plaza-FF� Monterey� 2014� Ave-DR� Cap� Ave-FF� Pier-DR� Creekside� Cap� Pier-FF� Creekside� Soquel� WQO<104 MPN/100 mL -� Upper-DR� Soquel� Creek� -� Upper-FF� Soquel� Creek� -� Soquel� Mid-DR� Creek� -� Mid-FF� Creek� Moosehead� mouth-DR� Moosehead� mouth-FF� Spreckles-DR� Spreckles-FF� Seacliff-DR� Seacliff-FF� Median�
Copper (Cu) 2014 WQO<30 µg/L San Mateo County Resource Conservation District
Copper (Cu) over time 50% over WQO San Mateo County Resource Conservation District
San Mateo County Resource Conservation District µ g/L� � � (ppb)� � 7th� Street-DR� 100� 120� 140� 160� 180� 200� 7th� 20� 40� 60� 80� 0� Street-FF� Vallemar-DR� Vallemar-FF� Weinke� San� Weinke� San� Vicente� San� Way-DR� Vicente� San� Vicente� Way-FF� Vicente� Ou all-DR� Creek� Ou all-FF� Creek� Mouth-DR� West� Mouth-FF� Cu Location Comparison West� Total� Point-DR� Point-FF� Capistrano� Vassar-DR� Capistrano� Copper:� Vassar-FF� Street-DR� El� Street-FF� Granada� El� � Granada� � � � Surfer's� SD-DR� � � � � Surfer's� SD-FF� � South-DR� San� South-FF� Mateo� Bay-DR� Arroyo� Bay-FF� Arroyo� Seco-DR� Woodrow-DR� Seco-FF� Woodrow-FF� and� Merced-DR� Merced-FF� Sites� Santa� 30th� 30th� Ave-DR� Simpkins-DR� Brommer� Ave-FF� Cruz� Simpkins-FF� Brommer� &� 38th-DR� &� Coun es� 38th-FF� Auto� Auto� Plaza-DR� Cap� Plaza-FF� Center-DR� Creekside� Cap� Center-FF� Creekside� � Monterey� Plaza-DR� 2001� Plaza-FF� Monterey� Ave-DR� Cap� Ave-FF� -� Creekside� Pier-DR� Cap� 2014� Creekside� Pier-FF� Soquel� -� Upper-DR� Soquel� Creek� -� Soquel� Upper-FF� Creek� Soquel� -� Creek� Mid-DR� -� WQO<30 µg/L Moosehead� Mid-FF� Creek� mouth-DR� Moosehead� mouth-FF� Spreckles-DR� Spreckles-FF� Seacliff-DR� Seacliff-FF� Median�
Zinc (Zn) 2014 WQO < 200 µg/L San Mateo County Resource Conservation District
Zinc(Zn) over time 20% over WQO San Mateo County Resource Conservation District
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