NV5 assisted the Los Angeles Department of Public Works assess the ecological risks to the marine environment at Marina Del Rey, California posed by groundwater contamination. NV5 developed a Work Plan for Harbor Surface Water Sampling (Work Plan) to address requirements of the Los Angeles Regional Water Quality Control Board. Following approval of the Work Plan, NV5 implemented the Harbor Surface Monitoring Program. The objective of the scope of work was to evaluate the potential ecological risks to the adjacent harbor waters posed by the petroleum hydrocarbon impacted groundwater beneath the Marina Del Rey Sheriff’s Station (Site).
The scope of work included the collection of surface water samples from a vessel at 10 site locations and one background sample for Total Petroleum Hydrocarbons (TPH)-gas by United States Environmental Protection Agency (EPA) 8015B, Volatile Organic Compounds (VOCs) and Oxygenates by EPA 8260, field parameters using a data sonde for temperature, pH, salinity, dissolved oxygen, and turbidity. Samples were collected during three harbor surface water sampling events (Fall, Winter, and Early Summer). Following each event, samples were delivered to the laboratory for analysis under chain of custody procedures. Laboratory reports were then assessed for quality assurance and then data summary reports were prepared. The scope of work was conducted under the oversight of a licensed California Professional Geologist (PG) or Professional Civil Engineer , having knowledge of specific practices and procedures relevant to the project. Sampling, quality assurance/quality control (QA/QC), data formatting and data submittals have been performed in accordance with the approved Work Plan.