Terra-Petra is an environmental engineering firm specializing in contaminated soil and groundwater conditions. Our expertise starts with soil gas characterization, remediation, and in the design and inspection of gas mitigation systems for buildings of all types.

Terra-Petra has been in the environmental engineering industry for over 20 years, with many successful projects to lean on. The company started its operations focusing on the Los Angeles market to address the local “methane concerns” that quickly became a big issue.

Terra-Petra will provide all consulting services for sub-slab vapor barriers, below grade waterproofing and drainage, podium and balcony waterproofing, planter waterproofing and drainage, exterior wall cladding and weather-resistive barriers and roofing assemblies.

From the initial soil and groundwater testing, to asbestos assessment and remediation, as well as hauling out contaminated materials, Terra-Petra can help. If your home or property has been impacted by wildfires, or any natural disaster, contacting Terra-Petra is here to help.

Terra-Petra is a leading provider of methane inspections in Los Angeles, throughout Southern California, and beyond. Our Methane Inspections team includes a staff of 13 inspectors certified by the City of Los Angeles as Deputy Methane Barrier Inspectors (DMBI).

The Terra-Petra Waterproofing Division strives to provide a holistic approach to Building Envelope Consulting with a focus on “making our clients’ lives easier”. We achieve this goal by responding to our clients’ needs in a timely manner and serving as their single point of contact for any services they need.

Terra-Petra is an environmental engineering firm specializing in contaminated soil and groundwater conditions. Our expertise starts with soil gas characterization, remediation, and in the design and inspection of gas mitigation systems for buildings of all types.

Terra-Petra’s oil field services offer our clients a one-stop shop for all their oil field needs. Our team will manage your project from start to finish, encompassing everything from initial consultation to the final report and submission of NFA (No Further Action) letter.

At Terra-Petra, where we prioritize environmental due diligence through our specialized Phase I Environmental Site Assessment services. As a trusted partner in real estate transactions and property development, we understand the importance of thoroughly evaluating environmental risks.

Terra-Petra is an environmental engineering firm specializing in contaminated soil and groundwater conditions. Our expertise starts with soil gas characterization, remediation, and in the design and inspection of gas mitigation systems for buildings of all types.