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Environmental Bio-Systems, Inc.

HEXAVALENT CHROMIUM REMEDIATION. Environmental Bio-Systems, Inc. Jim Jacobs, RG, REA, CHG. Movie: Erin Brockovich Contaminant: Cr(VI) Site: PG&E Hinkley, California facility. HOLLYWOOD & Cr(VI). TREATING Cr(VI): SOIL & GROUNDWATER. Isolation Immobilization Toxicity Reduction

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Environmental Bio-Systems, Inc.

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  1. HEXAVALENT CHROMIUM REMEDIATION Environmental Bio-Systems, Inc. Jim Jacobs, RG, REA, CHG Environmental Bio-Systems, Inc.

  2. Movie: Erin Brockovich Contaminant: Cr(VI) Site: PG&E Hinkley, California facility HOLLYWOOD & Cr(VI) Environmental Bio-Systems, Inc.

  3. TREATING Cr(VI): SOIL & GROUNDWATER • Isolation • Immobilization • Toxicity Reduction • Physical Separation • Extraction • (U.S. EPA, 2000) Environmental Bio-Systems, Inc.

  4. Metals Stabilization using Sulfide –Based Treatment • SULFIDES: Arsenic, lead, copper, zinc, cadmium, molybdenum, uranium • HYDROXIDE: CrVI reduces to CrIII then precipitates as chromium hydroxide. • OTHER: Cyanide forms thiocyanate, then treated with lime or biotreated. Environmental Bio-Systems, Inc.

  5. Case Study – Windsor, California23 miles NE of Santa Rosa Environmental Bio-Systems, Inc.

  6. Case Study – Windsor, CaliforniaData courtesy of Rick Thomasser and Jim RouseMontgomery Watson Harza Metals Stabilization with Calcium Polysulfide: 114 ports, 20 ft. centers, 1 event Environmental Bio-Systems, Inc.

  7. Delivery Method Injecting reductant using a direct push technology (DPT) probe rig. Site: Northern California Environmental Bio-Systems, Inc.

  8. Case Study – Windsor, California Major reduction of CrVI over a period of 1.5 yrs. CrVI reduced to CrIII then precipitated as Chromium Hydroxide (Data: Montgomery-Watson-Harza, 2001) Environmental Bio-Systems, Inc.

  9. Case Study – Windsor, California - Details • Contaminants: Cr (VI) • Low permeability aquifer • 114 injection ports • Spacing of RIP probes: 20 foot centers • Treatment event: about 2 weeks • Site: over 1 acre • Number of events: 1 Environmental Bio-Systems, Inc.

  10. Case Study – Windsor, CaliforniaData courtesy of Rick Thomasser and Jim RouseMontgomery Watson Harza Environmental Bio-Systems, Inc.

  11. Environmental Bio-Systems, Inc.www.EBSinfo.com QUESTIONS…. James A. Jacobs, RG, REA, CHG Tel: 415-381-5195 Fax: 415-381-5816 Email:augerpro@sbcglobal.net Environmental Bio-Systems, Inc.

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