As a sub-contractor, Broadbent has been providing services to a nationwide environmental contractor, at numerous sites throughout California, since 2009. Work has taken place throughout Alameda, Butte, Contra Costa, Los Angeles, Monterey, Napa, San Francisco, San Mateo, Santa Cruz, Solano, Sonoma, and Yolo counties. Provided services include quarterly and semi-annual groundwater monitoring and sampling activities and subsequent report preparation and submittal. Additional activities performed for the client include acquisition of encroachment permits assistance in obtaining case closure data management and review historical document review traffic control subcontractor coordination, biogeochemical monitoring, and light non-aqueous phase liquid (LNAPL) gauging and recovery. Broadbent is currently working on 34 of these sites for the client throughout California, but primarily in northern California.
Posts Categorized: Blog
Case Study on Landfill Closure Plan & Monitoring
Broadbent provided consulting services to a solid waste contractor, producing everything needed for a complete landfill closure plan an unlicensed active solid waste disposal site in Butte County, California. Broadbent delineate the vertical and lateral extent of contamination associated with the illegal burning and dumping at the site. Illegal dumping of solid waste including automobiles, appliances, and trash had occurred at this location for many years. The waste was typically burned in an effort to reduce its volume and covered with soil. Contaminants of concern included metals, petroleum hydrocarbons, polycyclic aromatic hydrocarbons, dioxins and furans. After executing a Work Plan for Preliminary Waste Characterization Study, Broadbent prepared the Waste Characterization Study Report. Broadbent then prepared a Removal Action Work Plan Read More »
Environmental Experience – Soil and Groundwater Investigation and Remediation
In 1994, two releases of petroleum hydrocarbons were discovered in the underground storage tank (UST) system at a major rental car facility at McCarran International Airport in Las Vegas, Nevada. Since 1995, Broadbent has performed investigation and remediation of soil and groundwater at the facility and properties downgradient of the facility that have been impacted by the release. Two additional facilities upgradient of the rental car facility have also had confirmed releases and have been identified as additional contributors to the impacted groundwater found in the vicinity of the rental car facility. The axis of the commingled shallow (20 to 25 feet below ground surface) dissolved methyl tertiary-butyl ether (MTBE) groundwater plume associated with these releases historically extended over 5,000 Read More »
Environmental Experience – Retail Service Stations in the Western United States
Broadbent has been providing environmental consulting and engineering services to a major oil and gas company, since 1989, focusing on underground storage tank (UST) and leaking underground storage tank (LUST) facilities. Broadbent has retained a contract with this company through numerous highly competitive consultant consolidation procurement events and in recent years has successfully expanded services with the client. In 2011, Broadbent was awarded a Master Service Agreement to provide Environmental Consulting and Engineering Services to the major gas and oil company, across North America. Currently, Broadbent is working as the client’s consultant on 36 LUST projects in California and Nevada and is a key consultant at an acid rock drainage project located at a former mine in the Sierra Nevada Mountains (Alpine County, CA). Work performed by Broadbent for the Read More »
Broadbent Managed 182 Sites as a LUST Trust Contractor for NDEP
Broadbent was contracted by the Nevada Division of Environmental Protection (NDEP), from 2004 to 2012, to manage the Leaking Underground Storage Tank (LUST) program. During this eight year period (two separate four-year contracts), Broadbent worked with NDEP staff on 18 different projects, some of which had multiple tasks. Work performed under this contract included Provided office assistance with Case File review Prepared a LUST Desk Manual Guidance Document for NDEP staff Assisted NDEP in development of Risk Based Policy for LUST sites Conducted statewide soil gas survey (including well point installation and development) to assist NDEP in evaluating human exposure to the vapor migration pathway from LUST sites Conducted detailed soil and groundwater characterization activities, including remediation feasibility pilot testing, Read More »