Frequently Asked Questions

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Our process is a “No Dig & Haul” biological approach. We introduce a customized microbial consortium (naturally occurring environmental bacteria) supported by biodegradable biosurfactants and field management practices that promote effective contact between biology and contamination. The microbes break down hydrocarbon contaminants directly in the soil over time, supporting soil health and recovery without excavation.

Hydrocarbons (like crude oil) are complex mixtures, and no single organism efficiently breaks down every component. A consortium enables multiple organisms to work together—some acting on simpler fractions while others target more complex compounds. This diversity enhances resilience under varying site conditions (temperature, moisture, and soil variability).

Salts are managed differently than hydrocarbons: chlorides are not “destroyed” biologically. Instead, we control salt impacts using an integrated approach that may include salt-tolerant biology along with site-specific moisture and soil-management practices aimed at reducing salt stress and restoring soil health over time. Progress is verified through follow-up sampling (e.g., chloride and related indicators) and field observations.

We treat crude oil, condensate, refined hydrocarbons (including TPH and BTEX), PAHs, and produced water/saltwater impacts—typically in place, without excavation.

Yes—soil type significantly affects how hydrocarbons migrate, how oxygen and water are distributed, and how effectively biological processes can contact contamination. PC Bio adjusts application strategies and field management to match site soil conditions.

• Sandy and loamy soils typically allow easier penetration and aeration, which can promote faster treatment progress.
• Clay-rich soils can limit oxygen and water flow, so we often focus on moisture management, aeration, and better contact (including mixing or conditioning when possible and allowed).
• Caliche and highly compacted pads can restrict infiltration and direct impacts into fractures or low-permeability zones; these areas may need more targeted conditioning to enhance contact and oxygen availability, depending on site constraints.

Regardless of soil type, progress is confirmed through baseline and follow-up sampling against applicable endpoints, and the approach is customized to the conceptual site model, operational constraints, and regulatory requirements.

We use non-pathogenic environmental bacteria meeting Biosafety Level 1 classification and biodegradable biosurfactants. By avoiding harsh chemical oxidizers, many sites can remain usable during remediation—depending on site conditions, client needs, and relevant regulatory requirements.

No. We use naturally occurring environmental organisms selected for performance under challenging field conditions, without genetic modification.

The biology is self-limiting. As hydrocarbon availability decreases, microbial activity naturally declines, and populations return to background levels over time as the soil ecosystem rebalances.

Yes. Our approach is designed for scalability. Depending on site needs and access, deployment can range from targeted field applications to larger-area methods and mapping-supported field execution for linear assets and broad footprints.

Rarely. Because the process is in-situ (in place), we can often work around active infrastructure such as pipelines, tank batteries, runways, and production pads—reducing disruption compared to excavation-based methods that usually require heavier equipment and longer downtime.

Our field approach aims to reduce migration risk by managing application rates and site moisture levels, while focusing treatment on the affected zone. Like any remediation method, site conditions are important; we adapt the approach based on soil type, depth, and site hydrology.

•  0–10 inches: Standard surface application is usually suitable for shallow impacts.
• 10–18 inches: We may use mechanical mixing (e.g., tilling or turning) to enhance distribution and oxygen availability.
• Beyond 18 inches: Deeper impacts usually require a site-specific design. We assess the conceptual site model and might use targeted subsurface delivery and oxygen management to reach the affected zone while keeping control of distribution. The approach depends on soil type, depth, access, utilities, and project goals.

In-situ bioremediation is often materially lower in cost than excavation and disposal, commonly cited at 40–60% depending on disposal rates, access, sampling requirements, and downtime impacts. Savings typically come from reducing or eliminating:

• Operational downtime.
• Excavation equipment and labor.
• Trucking and fuel costs.
• Landfill disposal fees.

Regulatory acceptance is focused on outcomes and data. Our in-situ results have been approved for closure on projects in jurisdictions like Texas, including under the Texas Railroad Commission's oversight. We support verification using EPA- and ASTM-aligned testing methods that are suitable for the program and contaminant mix. We work with your consultant and regulator to coordinate sampling and reporting requirements.

We use a documented verification workflow:

1. Baseline and follow-up sampling: Independent laboratory analysis of pre- and post-treatment samples.
2. Performance indicators: Many projects demonstrate significant reductions in TPH and salinity levels, with very high reductions in BTEX under favorable conditions. Results differ by site and are assessed against applicable regulatory endpoints.
3. Closure package: A comprehensive final report that includes analytical results, photos, and field documentation suitable for regulatory submission and stakeholder review.