Viridian’s creative approach, based on years of experience and insight into all types of environmental concerns, results in innovative, high-quality, cost-effective results.
NJDEP Perimeter Air Monitoring Technical Guidance
Viridian, known for its air expertise, has expanded its capabilities to include Perimeter Air Monitoring (PAM) design and execution following the NJDEP PAM Guidance.
Viridian Environmental Inc. possesses up-to-date capabilities to conduct Perimeter Air Monitoring (PAM), demonstrating expertise in planning and executing monitoring strategies that yield high-quality data. Viridian employs a systematic approach to ensure the effectiveness of perimeter air monitoring during remediation activities. Skilled professionals meticulously plan monitoring protocols, taking into account the specific characteristics of the site and potential contaminant sources. They execute these plans with precision, utilizing state-of-the-art monitoring equipment to capture comprehensive data on air quality.
Viridians skill set extends beyond data collection; we excel in evaluating the gathered information to make informed decisions regarding potential risks to off-site receptors. The evaluation process involves a thorough analysis of contaminant migration patterns and concentrations. This data-driven approach assesses whether actions are necessary to safeguard surrounding areas from the impact of remediation activities. Our skilled professionals maintain a vigilant watch over air quality, ensuring the protection of both following the NJDEP Perimeter Air Monitoring Technical Guidance to provide public health.
On-site Mobile Lab
Let the On-Site Mobile Lab support your soil gas and indoor air survey programs with our on-site, real-time analysis of volatile organic compounds (e.g., TCE,PCE), land fill gases and fuel hydrocarbons (e.g., methane, benzene).
Our lab data can support upward vapor intrusion investigation and remediation, site assessments, real estate transactions, ground water investigation and treatment systems, and other areas of concern. The Viridian® Mobile Lab is capable of achieving the low detection limits that meet NY and NJ stringent indoor air levels for VOCs.
Case Studies
Harmful Vapors in Foam Insulation
In two instances last year, Viridian® sampled vapors off-gassing from recently installed foam insulation in homes in northern NJ. Lab tests showed volatile organic vapors present, some of which exceeded the NJDEP vapor intrusion screening levels for residential indoor air.
In one case, in a newly renovated, unoccupied dwelling, the owners complained of odors that were offensive and seemed to be the result of insulating foam recently installed. In the second case, in which recently installed foam in an older home appeared to be causing serious breathing conditions, the owners were unable to occupy the home because the air was so bad.
Viridian® sent an experienced staffer to screen the indoor air with a PID, and collect samples of the foam from areas where it appeared discolored or incompletely formed. The samples, in sealed bags, were sent to Centek Lab which analyzed the vapors coming off the foam. In both cases, volatiles, including some harmful chlorinated compounds, were present above the NJDEP Indoor Air screening levels.
Information from the lab, which specializes in analyzing vapors off-gassing from foam insulation, indicates this is not an unusual occurrence.
In both the above instances, Viridian® recommended the owners have the homes re-tested after the insulation was removed and the spaces ventilated. Subsequent IA testing by Viridian® showed the contaminant levels were below a level of concern.