Solving Contaminated Groundwater Puzzle

In 1986 underground storage tanks were discovered to be leaking at a gas station within the City of Seal Beach. Over the next 23 years, site cleanup was a low priority according to Regional Water Quality Control Board policies.  The site’s unsuccessful clean-up efforts included removing the tanks, drilling groundwater monitoring wells, and sporadic remediation…

Managing Unexpected Endangered Species

Even with environmental permits in hand and construction set to begin, routine pre-construction surveys sometimes result in the unexpected discovery of sensitive (endangered) species. The San Diego County Water Authority’s project to raise San Vicente Dam – the largest such project in the United States – had been issued permits for three federally listed endangered…

Groundater Supply for Renewable Energy Sites

  Sustainable water supply is a crucial factor when seeking approval to build and operate renewable energy projects in remote California locations.  With municipal water infrastructure and surface water sources typically not available, groundwater is often the most practical water supply option for construction and long-term operations. However, groundwater is subject to increasingly complex assessment…

Dudek Ranks Among 200 Top Environmental Firms

  Dudek ranks 146 among the  United States’ 200 top environmental firms measured by revenue, according to the annual list published August 1 by Engineering News Record (ENR).  ENR is published by McGraw-Hill.  It is the fifth consecutive year Dudek has been ranked on the list. The rankings include 24 firms headquartered in California.  Dudek…

Mitigation Bank Advantages

  Public agencies may now find it advantageous to develop wetland mitigation banks rather than pursue project-specific mitigation, as a result of rule changes by the U.S. Army Corps of Engineers and U.S. Environmental Protection Agency. The regulatory change is an effort to develop watershed-based planning.  Mitigation banks create larger wetlands projects with greater ecological…

Risk Assessment of Aging, Non-Native Eucalyptus Trees

  Rotted blue gum eucalyptus present significant risk to people and property. Dudek arborists have evaluated thousands of blue gums  to understand how external conditions can indicate internal wood rot. California municipalities were reminded recently of the risk presented by blue gum eucalyptus trees when a 10-ton tree in Orange County toppled on to a…

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