Phase II


Phase II Environmental Site Assessments are conducted at a client’s request when a Phase I ESA identifies a Recognized Environmental Condition (REC) at a property. A Phase II ESA typically involves the collection of samples (soil, groundwater, air samples) to identify if contamination is impacting the property. NOVA has a strong background in performing Phase II ESAs, which include environmental drilling, groundwater monitoring well installation, and soil & groundwater sampling.


Symphony Park is located on the historic Union Pacific Railroad Yard (UPRR). For approximately 90 years, the UPRR operated its maintenance & fueling at this location causing contamination of the soil and groundwater to the UPRR site and to downtown Las Vegas from a variety of contaminants. This Phase I ESA included an extensive file review of records through the Nevada Division of Environmental Protection (NDEP) and of the Soil and Groundwater Management documents created for the Symphony Park location. The Aspen Heights project area was determined to be historically located in the area of the former maintenance yard with a fuel pipeline shown in maps to travel through the project area, along the tracks. The current usage of the site was a parking lot for the Smith Center for the Performing Arts. A Recognized Environmental Condition (REC) was determined in the Phase I ESA for the known historic contamination of the site.


NOVA conducted a Ground Penetrating Radar (GPR) survey at a property on Main Street to confirm the presence/absence of underground storage tanks historically identified in a previous Phase I ESA. In addition to the GPR study, NOVA also conducted limited drilling and soil sampling at the property to identify potential contamination due to the historical use of the property as a gas station.


The City of North Las Vegas Metropolitan Police is planning to expand a firing range they own in East Las Vegas. The site contained large berms that contain rounds of shell casings and ammunition powder. NOVA was hired to perform a Limited Phase II Assessment of lead in the soil, in and around the firing center. Using an XRF Niton XL2 analyzer, NOVA was able to locate areas where the soil was contaminated and create a map to begin the process of remediating for an upcoming renovation.


NOVA conducted limited soil and groundwater sampling along Las Vegas Boulevard from Sahara Avenue to Bridger Avenue. The purpose of the soil and groundwater sampling was to identify potential contamination in suspect areas encountered during previous geotechnical drilling. Samples were taken in order to determine proper soil management methods for the upcoming planned construction improvements and dewatering activities.


During utility work for adjacent Allegiant Stadium in the intersection of West Hacienda Avenue and Polaris Avenue, petroleum impacts were discovered during trenching of the utility lines. Through the Phase I ESA completed for the stadium, NOVA staff were aware of the jet fuel pipeline that extends from the Kinder Morgan Bracken Junction Hacienda/Decatur and travels to McCarran International Airport. The pipeline ruptured in the mid-1990s creating the impacted soil in the intersection. NOVA completed soil sampling and excavation oversight while excavations continued in the area of impacted soil.