Field Activity 2018-624-FA

Identifier 2018-624-FA
Purpose Determine the marine dispersal and contaminant burden of terrigenous sediment from wildfire-impacted watersheds.
Location San Pablo Bay to Honker Bay, California
Summary Sample locations on FAD 10/1/2018 Twenty three grab samples were collected; the surface 0-2 cm were preserved for geochemical analyses.
Info derived Grain size, TOC, PAH, elemental composition.
Comments Funding Project: Priority Ecosystems Mini-Proposal
Fast Eddy (SC)
Boston Whaler 21 foot
Elantra G13-2403R
Start Napa, CA 2018-04-26
End Napa, CA 2018-04-27
Days in the field 2
West -122.53825802
East -121.88881683
North 38.14564366
South 38.01506011


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Renee K Takesue
Crew members
Cordell Johnson
Scientist, Staff
Rachel K Marcuson
Scientist, Staff
Information specialist(s)
Renee K Takesue
Specialist, Information
Affiliate principal Brett Tipple (UCSC)

Data types and categories

Data category: Location-Elevation, Sampling
Data type: Navigation, Geology

Equipment used

Equipment Usage description Data types Datasets
Handheld GPS Navigation (no data reported)
Ponar grab sampler Biology, Chemistry, Geology 2


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Parent and alkylated polycyclic aromatic hydrocarbons (PAHs) and per- and polyfluoroalkyl substances (PFAS) in north San Francisco Bay, Napa River, and Sonoma Creek in 2018 and 2019 Ponar grab sampler Sediment grain-size distributions, stable carbon isotope ratios (d13C), total carbon to total nitrogen ratios (C:N), short-lived radionuclides (Beryllium-7, Cesium-137, and Lead-210), concentrations of 76 parent and alkylated polycyclic aromatic hydrocarbons (PAHs) and concentrations of 33 per- and polyfluoroalkyl substances (PFAS) were measured in the northern reach of San Francisco Bay (San Pablo and Suisun Bays), and in stream beds of the lower reaches of Napa River and Sonoma Creek, 5 months and 20 months after the 2017 Atlas and Nuns wildfires. New sites for sediment geochemistry analyses added 20 months post-fire included the lower reaches of Petaluma Creek and Suisun Slough, and in marsh sediment on Napa River and Sonoma Creek. Renee K Takesue
Geochemistry of sediment and organic matter in drainages burned by the Altas and Nuns wildfires in October 2017 and of nearshore seabed sediment in north San Francisco Bay from March to April 2018 Ponar grab sampler Fine-grained sediment was collected from the banks of Napa River, Sonoma Creek, and tributaries in March 2018 and from shallow nearshore areas of the northern reach of San Francisco Bay in April 2018. Bulk sediment was dated using activities of short-lived cosmogenic radionuclides (beryllium-7, cesium-137, and lead-210). Contents of potentially toxic metals and source-rock-indicative elements, including rare earth elements, were quantified in the fine fraction of sediment (particles less than 0.063 mm diameter). Ratios of stable carbon-13/carbon-12 isotopes and total carbon to total nitrogen were determined in sedimentary organic matter. Renee K Takesue


Samples collected during this field activity