Sediment chemistry in nearshore Bellingham Bay, urban creeks and the Nooksack River, Puget Sound, Washington, March and September 2019

Concentrations of individual polychlorinated biphenyl (PCB) congeners, polycyclic aromatic hydrocarbons (PAHs), and chlorinated pesticides are reported for surface sediments collected along the nearshore of Bellingham Bay, the Nooksack River, and four urban creeks discharging to Bellingham Bay in March 2019. Additional samples were collected along the nearshore urban waterfront corridor in September 2019. All samples were sieved to remove material 2 millimeter (mm) and larger in diameter. At one location (ST-5), an additional three samples were submitted to investigate chemical concentration dependence on particle-size (sieved to < 0.5 mm, < 0.125 mm, and < 0.0625 mm). Grain size distribution and organic carbon content on bulk (unsieved) samples are also reported. For a subset of samples, organic carbon content was also determined on the < 2 mm fraction. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

本数据集记录了2019年3月采集自贝灵汉湾近岸区域、努克萨克河以及4条汇入贝灵汉湾的城市小溪的表层沉积物中，各多氯联苯（polychlorinated biphenyl, PCB）同系物、多环芳烃（polycyclic aromatic hydrocarbons, PAHs）与氯化农药的单体浓度。2019年9月，研究团队额外在近岸城市滨水廊道区域采集了补充样品。所有样品均经过筛处理，剔除直径2毫米（mm）及以上的组分。在编号为ST-5的采样点，额外提交了3份子样品，以探究化学浓度与粒径的相关性：该3份样品分别被过筛至粒径小于0.5 mm、0.125 mm及0.0625 mm。本数据集同时报告了全量（未过筛）样品的粒度分布与有机碳含量；对于部分子样品，还测定了其<2 mm组分的有机碳含量。本数据集提及的任何贸易、企业或产品名称仅用于描述性用途，并不代表美国政府对此类名称的认可或背书。