Vapor Intrusion
Vapor Intrusion occurs when harmful soil contamination changes phase from liquid to vapor underground and moves upward through geologic layers and building foundations, accumulating within indoor air.
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Plutonic Rock (Igneous)
Plutonic Rock (Igneous) Definition The term “Plutonic” in the field of geology refers to an igneous rock, wherein the magma had originally cooled, solidified, and crystalized underground. A plutonic rock is generally coarsely crystalline (phaneritic) and is formed during a massive geologic intrusion of magma. In fact, outcropping (or daylighting) plutonic rocks are geologic features…
Environmental Due Diligence | Environmental Engineering & Construction | Land Development & Real Estate | Remediation & Clean-Up
De Minimis Condition in Phase 1 ESA Reports?
De Minimis Condition in Phase 1 ESA Reports? A de minimis condition, as per the ASTM E1527 Standard for Phase 1 Environmental Site Assessment reports, is a property condition that doesn’t pose a threat to human health or the environment. Although this is a notable concern to document, it does not warrant further action or…
Environmental Due Diligence | Indoor Air Quality Protection | Land Development & Real Estate | Methane Mitigation | Remediation & Clean-Up
City of Long Beach Methane Gas Zone Mitigation
City of Long Beach Methane Gas Zone Mitigation A City of Long Beach Methane Gas Zone represents areas with high levels of subsurface natural gas and methane soil gas. These areas present explosion hazards for buildings, due to biogenic and petrogenic gases of decomposing petroleum deposits, and landfills. As a result, the Building and Safety Bureau…
Unobstructed Opening in Methane Mitigation
Unobstructed Opening Definition in Methane Mitigation Unobstructed Opening: Per the Los Angeles Department of Building and Safety (LADBS) Methane Code, Ordinance Number 175790, an unobstructed opening is a permanent clearance or gap in the walls, floors, or ceiling of a structure, to allow for direct fresh airflow. In methane mitigation plan applications, this does not…
Unconfined Aquifer
Unconfined Aquifer Unconfined Aquifer: In the hydrogeology branch of geology, an unconfined aquifer is an aquifer that has a water table. In fact, an unconfined aquifer can only be the uppermost hydrogeologic unit and is particularly one that has no hydraulic head (or pressure) that is equal to atmospheric pressure. To illustrate, depth to groundwater…
Environmental Due Diligence | Environmental Engineering & Construction | Land Development & Real Estate
Phase 1 Environmental Site Assessment Cost
What is the Phase 1 Environmental Site Assessment Cost As of the year 2024 a typical Phase 1 Environmental Site Assessment cost ranges between $1,900 and $3,200. The price depends on the property size, location, and turnaround time. Sometimes, Phase 1 ESA prices can be as high as $6,500. For instance, a 3,000-sqft typical commercial…