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2019
Sutton, R.; Chen, D.; Sun, J.; Greig, D. J.; Wu, Y. 2019. Characterization of brominated, chlorinated, and phosphate flame retardants in San Francisco Bay, an urban estuary. Science of the Total Environment 652, 212-223 . SFEI Contribution No. 859.

Flame retardant chemical additives are incorporated into consumer goods to meet flammability standards, and many have been detected in environmental matrices. A uniquely wide-ranging characterization of flame retardants was conducted, including polybrominated diphenyl ethers (PBDEs) and 52 additional brominated, chlorinated, or phosphate analytes, in water, sediment, bivalves, and harbor seal blubber of San Francisco Bay, a highly urbanized estuary once considered a hot spot for PBDE contamination. Among brominated flame retardants, PBDEs remained the dominant contaminants in all matrices, though declines have been observed over the last decade following their phase-out. Hexabromocyclododecane (HBCD) and other hydrophobic, brominated flame retardants were commonly detected at lower levels than PBDEs in sediment and tissue matrices. Dechlorane Plus (DP) and related chlorinated compounds were also detected at lower levels or not at all across all matrices. In contrast, phosphate flame retardants were widely detected in Bay water samples, with highest median concentrations in the order TCPP > TPhP > TBEP > TDCPP > TCEP. Concentrations in Bay water were often higher than in other estuarine and marine environments. Phosphate flame retardants were also widely detected in sediment, in the order TEHP > TCrP > TPhP > TDCPP > TBEP. Several were present in bivalves, with levels of TDCPP comparable to PBDEs. Only four phosphate flame retardants were detected in harbor seal blubber: TCPP, TDCPP, TCEP, and TPhP. Periodic, multi-matrix screening is recommended to track contaminant trends impacted by changes to flammability standards and manufacturing practices, with a particular focus on contaminants like TDCPP and TPhP that were found at levels comparable to thresholds for aquatic toxicity.

Sun, J.; Davis, J. A.; Stewart, R.; Palace, V. 2019. Selenium in White Sturgeon from North San Francisco Bay: The 2015-2017 Sturgeon Derby Study. SFEI Contribution No. 897. San Francisco Estuary Institute: Richmond, CA.

This report presents the findings from a study evaluating selenium concentrations in white sturgeon (Acipenser transmontanus) tissues collected during the 2015-2017 Sturgeon Derby events in North San Francisco Bay. The goal of this study was to investigate the distribution of selenium among sturgeon tissues to inform the toxicological and regulatory interpretation of selenium measured in non-lethally collected tissues, including muscle plugs and fin rays. This technical report provides documentation of the study and presents its major findings.

 (1.17 MB)
2018
Shimabuku, I.; Trowbridge, P.; Sun, J. 2018. Bay 2017 Bay RMP Field Sampling Report. SFEI Contribution No. 849. San Francisco Estuary Institute : Richmond, CA.
 (7.01 MB)
Sun, J. 2018. Non-Targeted Analysis of Water-Soluble Compounds Highlights Overlooked Contaminants and Pathways (Coming Soon). SFEI Contribution No. 905. San Francisco Estuary Institute: Richmond, CA.
Grieb, T.; Roy, S.; Rath, J.; Stewart, R.; Sun, J.; Davis, J. A. 2018. North Bay Selenium Monitoring Design. SFEI Contribution No. 921. San Francisco Estuary Institute : Richmond, CA.
 (2.08 MB)
Lin, D.; Sutton, R.; Sun, J.; Ross, J. 2018. Screening of Pharmaceuticals in San Francisco Bay Wastewater. SFEI Contribution No. 910. San Francisco Estuary Institute : Richmond, CA.
 (1.06 MB)
Sun, J.; Davis, J.; Stewart, R. 2018. Selenium in Muscle Plugs of White Sturgeon from North San Francisco Bay, 2015-2017. SFEI Contribution No. 929. San Francisco Estuary Institute : Richmond, CA.
 (2.24 MB)
2017
Trowbridge, P.; Sun, J.; Franz, A.; Yee, D. 2017. 2017 Margins Sediment Cruise Plan. SFEI Contribution No. 847. San Francisco Estuary Institute : Richmond, CA.
 (919.33 KB)
Lin, D.; Sun, J.; Yee, D.; Franz, A.; Trowbridge, P.; Salop, P. 2017. 2017 RMP Water Cruise Plan. SFEI Contribution No. 845. San Francisco Estuary Institute : Richmond, CA.
 (3.63 MB)
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Sun, J.; Pearce, S.; Trowbridge, P. 2017. RMP Field Sampling Report 2016. SFEI Contribution No. 826. San Francisco Estuary Institute: Richmond, CA.
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 (1.85 MB)