Former Gas Station—Southern Indiana

ORIN successfully treated BTEX contaminated groundwater utilizing ORIN’s patented Bioavailable Absorbent Media (BAM). The primary contaminant, Benzene, was prevalent in five of the primary monitoring wells on site. ORIN utilized DPT in order to pinpoint the targeted areas with higher Benzene concentrations.

A vacuum truck was utilized during chemical injection to remove highly contaminated groundwater and to provide hydraulic control. Fifty-six injection points received a combined total of 4,760 gallons of treatment chemistry.

The Challenge

The site presented significant contamination:

• High benzene concentrations:
  • MW-4: 10,800 µg/L
  • MW-5: 8,500 µg/L
• Five impacted monitoring wells
• Need for precise treatment targeting
• Site closure requirements
• Complex distribution needs

The Solution: Strategic BAM Implementation

The team executed a comprehensive treatment approach:

1. Treatment Design:
   • 56 strategic injection points
   • 4,760 gallons total treatment volume
   • DPT targeting methodology
   • BAM technology deployment
   • Integrated vacuum extraction
2. Implementation Strategy:
   • Precise contamination targeting
   • Hydraulic control maintenance
   • Contaminated water removal
   • Treatment distribution optimization
   • Continuous monitoring

Remarkable Results

The treatment achieved exceptional success:

Initial Results:

• MW-4: From 10,800 µg/L to non-detect
• MW-5: From 8,500 µg/L to 1,970 µg/L
• Overall 90.9% benzene reduction
• Consistent improvements across all wells

Long-Term Success:

• Below standards after one year
• Successful site closure achieved
• Sustained treatment effectiveness
• Regulatory compliance maintained

Key Success Factors

Several elements contributed to project success:

1. Precise DPT targeting
2. Strategic BAM application
3. Effective hydraulic control
4. Comprehensive monitoring
5. Long-term verification

Innovation Highlights

The project demonstrated several advantages:

• Rapid initial reduction
• Long-term effectiveness
• Successful site closure
• Complete contaminant elimination
• Cost-effective treatment

Practical Applications

This success provides solutions for:

• Gas station remediation
• High benzene concentrations
• Site closure achievement
• Regulatory compliance
• Long-term treatment

This case study demonstrates how BAM technology can transform heavily contaminated sites into closed cases, meeting all regulatory requirements.