Who We Are

TESTOR is a leader in the field of environmental testing, decontamination and abatement. Decades of experience advising families, schools, building managers and government agencies on issues of industrial hygiene means that we can respond decisively to identify and mitigate your environmental risks. Our mission is to find the most economical solution that will achieve the best ‘in compliance’ result for each customer.

Pragmatic and Fair

Sten Evenhouse, our founder, is highly respected for his ability to calmly navigate the often daunting environmental services industry. TESTOR’s consultants and laboratory technicians are fully trained, licensed and accredited, and we pride ourselves on delivering personal care and attention to each client, no matter the project size.


What We Do

Trained and licensed to identify potentially hazardous materials within your physical environment, our specialized team of consultants will listen to your concerns, observe your environment, identify the appropriate tests for any potential issues, and recommend appropriate mitigation solutions.

Clear, helpful advice

We will send you a tailored, comprehensive report via My Reports that gives a clear description and explanation of the laboratory data in terminology that’s easily understood by all. You will have all information necessary to make the right choices to create a healthy environment and comply with relevant city, state and federal regulations.

Frequently Asked Questions

Are you accredited?

TESTOR carries the latest Environmental Protection Authority (EPA) and New York State (NYS) licenses for lead, asbestos, and mold bulk, air and wipe sampling. Our laboratory, accredited by the NYS DOL ELAP program, handles PCM Fiber Analysis.  All inspectors/technicians are also personally licensed per NYC and NYS training and certification requirements.

What is the scope of services that you offer?

TESTOR specializes in comprehensive environmental consultation and inspections. We provide testing for asbestos, lead, mold, soil, water, PCBs and Volatile Organic Compounds (VOCs), Indoor Air Quality Testing (IAQ) and produce online-accessible reports. In New York City our asbestos investigators perform inspections according to local law 56 and are licensed to manage all your compliance documentation requirements such as ACP5s and ACP7s. We also provide Third Party Air Monitoring, project management and independent review.

How long will it take to get results?

TESTOR will respond promptly to your request by scheduling an inspection.  Our in-house Asbestos PCM laboratory can provide 1-hour expedited analysis and a complete report can be available for your review at My Reports. Other services may require more extensive analysis and could have longer turn-around-times.

How much will it cost?

A standard NYC residential inspection costs $400.00-$700.00 depending on the location plus the cost of the samples which varies depending on the material type and quantities needed. Contact us for an estimate.

Request an Appointment

Tell us a little about your environmental situation for a rapid response by a specialist


Certified, Licensed & Fully Insured

TESTOR holds the necessary company and individual certifications from all relevant local, state and federal agencies that regulate the industry.

Dept of Labor

Testor News

white walls with door ajar

What is XRF testing and do I need it?

XRF stands for X-Ray Fluorescence. This method tests materials by hitting them with X-rays and recording the resulting fluorescent X-rays that are emitted. Each element releases a unique signal and measuring this determines the concentration of the element being tested. This method is used to test for the presence of lead-based paint.  The benefit of…


picture of mold wall

Mold Testing vs. Mold Assessment

What is the difference between mold testing and mold assessment and which do you need? Mold testing is the process of taking samples using a swab, tape or air pump.  This offers concrete, analytical data.  Air testing provides spore counts and compares indoor and outdoor samples to look for amplification.  Direct sampling tells you if…


flooded streets

Are you concerned about mold after the recent storms?

Mold testing is a straightforward process of taking samples using a swab, tape or air pump.  This offers concrete, analytical data.  Air testing provides spore counts and compares indoor samples to outdoor samples to look for amplification.  Direct sampling tells you if a sample is mold and what type.  Mold testing can be less expensive…