About 999 testing

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Our range of industry knowledge and expertise includes methane mitigation & environmental engineering, methane & subsurface soil-gas investigations, design and engineering of methane & soil-gas mitigation systems, tar and groundwater mitigation systems, construction inspection services, foundation isolation design for contaminated sites, expert testimony, and specialized soil gas consulting.

Every day, our team puts our reputation on the line by providing our clients with professional services that make California and other communities throughout the United States a safer and less hazardous environment. Methane Mitigation Test, Design, Inspection and Installation.