Electric, Gas & Energy Home Insights Publications Spatially averaged, flow-weighted concentrations – a more relevant regulatory metric for groundwater cleanup Murray Einarson advocates for the use of a new standard for groundwater cleanup in place of maximum contaminant levels. EPA releases updated toxicity values for Benzo(a)Pyrene: what you need to know EPA has published higher risk-based screening values for benzo(a)pyrene. Find out how this might affect your projects. Direct push optical screening tool for high-resolution, real-time mapping of chlorinated solvent DNAPL architecture The tool is a new site characterization technology that facilitates 3-D delineation of residual chlorinated solvent DNAPL in the subsurface. Emerging contaminants in Arizona water: a status report Haley & Aldrich staff worked closely with ADEQ's Advisory Panel to produce this report on emerging contaminants in Arizona’s water supplies. Coal combustion product (CCP) safety data sheet guidance document Haley & Aldrich has prepared this guidance document to help companies develop OSHA-compliant Safety Data Sheets for Coal Combustion Products. FGD gypsum safety data sheet guidance document Haley & Aldrich has prepared this guidance document to help companies develop OSHA-compliant Safety Data Sheets for FGD gypsum. Regulatory guidance: Risk assessment and the CCR rule This publication outlines four opportunities to use risk assessment as it relates to the CCR Rule to demonstrate the protection of human health and the environment. Haley & Aldrich’s climate practice: from vulnerability assessments to strategic planning Haley & Aldrich’s climate-related business is growing quickly, especially on the resilience and adaptation side. Overview of depth‐discrete multilevel groundwater monitoring technologies: focus on groundwater monitoring in areas of oil and gas well stimulation on California Describes key multilevel systems for groundwater monitoring in areas of oil and gas well stimulation, as required by California law. The rise of ISO 45001: a new global occupational health and safety management system standard Danyle Hepler, Client Leader and Senior Scientist, provides her perspective on the potential impact of the ISO 45001 in this technical brief. New data on background indoor air levels of volatile organic compounds (VOCs) and air-phase petroleum hydrocarbons (APH) in office buildings and schools Vapor Intrusion Practice Leader Rich Rago offers an analysis on the new data. Lessons from the Streetcar The use of trenchless technology in urban settings is firmly established, and the Atlanta Streetcar HDD project demonstrates how well it can succeed. Seven ways to achieve lean success Steve MacIntyre, Haley & Aldrich Lean Integration Leader, explores seven strategies for a successful lean integration. ASCE to release new microtunnel guidelines Dennis Doherty, National Practice Leader for Trenchless Technologies, details the new microtunneling guidelines from ASCE.