Estimation of Contaminant Loads from the Sacramento‐San Joaquin River Delta to San Francisco Bay. (1st April 2015)

• Record Type: Journal Article
• Authors: David, N.; Gluchowski, D. C.; Leatherbarrow, J. E.; Yee, D.; McKee, L. J.
• Is Part Of: Water environment research. Volume 87:Number 4(2015)
• Page Start: 334
• Page End: 346
• Publication Date: 2015-04-01
• Subjects: loads -- Sacramento River -- mercury -- PCBs -- San Francisco Bay; Water quality management -- Periodicals; Water -- Purification -- Periodicals; Water -- Pollution -- Periodicals; Water -- Pollution; Water -- Purification; Water quality management; Sewage; Water Pollution; Periodicals; Electronic journals; Periodicals; 628.16
• DOI: 10.2175/106143015X14212658613721
• Languages: English
• ISSNs: 1061-4303

Abstract

ABSTRACT: : Contaminant concentrations from the Sacramento‐San Joaquin River watershed were determined in water samples mainly during flood flows in an ongoing effort to describe contaminant loads entering San Francisco Bay, CA, USA. Calculated PCB and total mercury loads during the 6‐year observation period ranged between 3.9 and 19 kg/yr and 61 and 410 kg/yr, respectively. Long‐term average PCB loads were estimated at 7.7 kg/yr and total mercury loads were estimated at 200 kg/yr. Also monitored were PAHs, PBDEs (two years of data), and dioxins/furans (one year of data) with average loads of 392, 11, and 0.15/0.014 (OCDD/OCDF) kg/yr, respectively. Organochlorine pesticide loads were estimated at 9.9 kg/yr (DDT), 1.6 kg/yr (chlordane), and 2.2 kg/yr (dieldrin). Selenium loads were estimated at 16 300 kg/yr. With the exception of selenium, all average contaminant loads described in the present study were close to or below regulatory load allocations established for North San Francisco Bay.