Product

BOS 200®

Designed for aggressive in-situ sorption of petroleum hydrocarbons

Target Contaminants:

LNAPL, BTEX, MTBE, TPH-GRO/DRO

Delivery Method:

Direct push injection, packer injection, soil blending

Ideal Use Cases:

BOS 200® is AST's leading in-situ petroleum hydrocarbon remediation solution, with an unmatched track record

How It Works

BOS 200® is a complete system effecting accelerated biodegradation of various organic compounds on an activated carbon platform that includes micro and macro nutrients, time release terminal electron acceptors, and a blend of facultative organisms designed to flourish within the aerobic to anaerobic conditions present in the pore structure of the carbon. It has been demonstrated to be effective with LNAPL, fuel oxygenates, alcohols, glycols, and cyclic ethers. No toxic byproducts such as sulfide are produced. The product is insensitive to groundwater geochemistry and is effective under aerobic and anaerobic conditions and over a broad range of pH. High salinity and TDS of 30,000 ppm are also not detrimental to performance.

Mechanism:

  • Sorption: High-surface-area carbon adsorbs hydrocarbons on contact, significantly reducing dissolved-phase mass.
  • Biodegradation Support: BOS 200 includes a proprietary blend of micro and macro nutrients, time release terminal electron acceptors, and facultative organisms
  • Sustained Remediation: Combines immediate mass reduction with long-term biological activity for continued performance after injection.

BOS 200 is highly effective even in coarse-grained soils and can be injected into smear zones, residual LNAPL areas, and dissolved groundwater plumes.

Common applications:

  • BTEX, LNAPL, and TPH plumes
  • Residual smear zones
  • Fuel depot or UST releases
  • MNA supplement or post-excavation polishing

Typical site types:

  • Gas stations
  • Refineries and terminals
  • Rail yards and logistics hubs
  • Military fueling areas
  • Airports
  • Emergency spill response sites

Performance Results

Product Comparison

Feature / SpecBOS 100®CAT 100®BOS 200®BOS 200+®
Target ContaminantsChlorinated solvents (TCE, PCE, DCE, VC)CVOCs, DNAPL, mixed chlorinated solvent massPetroleum hydrocarbons (BTEX, TPH, LNAPL)Complex PHC sites: LNAPL, MTBE, glycols, etc.
Ideal Use CasesCVOC dissolved groundwater plumes, low-high perm zones, permeable reactive barriers (PRB)DNAPL source zones, high-mass CVOC, mixed plumesBTEX/LNAPL plumes, blend into backfill of excavationLNAPL source zones, high-mass VOC, PRBs
Treatment MechanismAdsorption + abiotic reductive dechlorination (ZVI)Adsorption + catalytic degradation + engineered bioAdsorption + aerobic biodegradationAdsorption + enhanced bio (aerobic & anaerobic)
Activated Carbon TypeGranular AC impregnated with reactive ironGranular AC impregnated with reactive ironPowdered activated carbonGranular AC impregnated with reactive iron
Biological Degradation ComponentNoYesYesYes
Delivery MethodsDirect push, trench, soil mix, packer, GeoTAPDirect push, trench, soil mix, packer, GeoTAPDirect push, trench, soil mix, packer, GeoTAPDirect push, trench, soil mix, packer, GeoTAP
Year Released2004201620022016
Projects Completed100+50+1000+200+


FAQ's

A proprietary injectable amendment designed to treat petroleum hydrocarbons in groundwater and soil through sorption and biodegradation.

BTEX compounds, LNAPL, TPH-GRO/DRO, and fuel-related hydrocarbons such as MTBE.

Typically injected via direct push or wells. It can also be applied through soil mixing or excavation support zones.

It rapidly adsorbs hydrocarbon compounds and stimulates aerobic biodegradation with an integrated nutrient blend.

Typically 3–5 years of active performance, with extended tailing effects depending on site conditions.

Yes. It is especially effective in treating smear zones and residual LNAPL where traditional technologies struggle.

Yes. It is often combined with excavation, air sparging, or monitored natural attenuation to optimize results.

Best suited for permeable to moderately permeable formations where petroleum impacts are present in the saturated or smear zones.

Dosing is based on contaminant concentration, lithology, and application method. AST and RPI provide dosing recommendations after reviewing site-specific data.

Yes. The RPI Project Support Laboratory provides no-cost data analysis, dosing recommendations, and performance validation.

BOS 200® includes a tailored nutrient blend that promotes in-situ biodegradation in addition to immediate sorption—delivering faster and more sustainable results than carbon alone.

Ready to Clean Up Your Site?

We’ve helped stakeholders across the world achieve cleanup goals faster, safer, and more cost-effectively — and we can do the same for you.

Let’s talk through your site and see if in-situ remediation is a fit.

Newsletter Sign-up

Receive information about remediation techniques, AST's activities and more...
Cleaning up the world,
one site at a time

Headquarters

Copyright © 2025 AST Environmental, Inc. all rights reserved.