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Terra Petra specializes in environmental soil and soil gas characterization and remediation, and in the design and inspection of soil gas mitigation systems for buildings of all types including commercial, multiple family, single family, industrial, institutional and retail. In heavily populated areas such as Los Angeles. Our environmental engineering services include Methane, Brownfield, Vapor In

Electrigaz develop biogas recovery systems to extract green energy from organic wastes. Bio-methane and bio-hydrogen from biomass produce via fuel cell clean electricity and reduce greenhouse gases (GHG).

Sanborn Head is a privately held, multi-disciplinary technical consulting firm that applies a strategic approach to assist clients across the United States and throughout the world. We have expanded our services from our original focus in the geo-sciences and engineering to provide a broad array of integrated professional services that create value by helping our clients address complex challenges

SBS Corporation - Engineered products for fluid cooling, heating, filtering and handling.

Photovac carries portable gas chromatographs instruments, gas flame ionization chromatography instruments, and btex monitoring equipment, along with photoionization detectors (PIDs). Photovac is the premier provider of hand-held instruments for superior detection, measurement, analysis, and monitoring of volatile organic compounds (VOCs) in air, soil, or groundwater.