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6394323 
Book/Book Chapter 
BTEX/TVPH remediation using an oxygen release compound 
Fischer, NM; Reed, T; Camrud, D; Madsen, C 
2001 
BIOREMEDIATION SERIES 
6 
10 
15-22 
WOS:000175098800003 
The project site was a former gasoline station. Underground storage tanks (USTs) and petroleum-contaminated soils were removed from the site in May of 1996. Following the completion of assessment activities a Corrective Action Plan (CAP) was submitted to Oil Inspection Section (OIS) in August of 1996. The CAP recommended the use of a soil vapor extraction (SVE) and an air sparging system to remediate soil and groundwater contamination at the subject site. A CAP Addendum was completed to reassess the remedial technologies. The emergence of a solid peroxygen technology (Oxygen Release Compound - ORC(R)) designed to deliver oxygen in a passive, low-cost, time-release manner, appeared as a promising option to promote the in-situ bio-remediation of the groundwater. The design of the groundwater remediation program with ORC assumed a treatment area of approximately 8,000 square feet and an average total volatile petroleum hydrocarbon (TVPH) concentration of 5.4 mg/L. Based on these parameters, 1,242 pounds of ORC was applied in May 1998. The material was injected on approximately 20-foot centers to cover the proposed treatment area. Direct-push technology (DPT) was used to deliver the ORC slurry through 34 injection points using an injection pressure of approximately 62 psi. In addition to the ORC application, 148 gallons of microbe slurry, and 116 pounds of nutrient mix were injected to increase the effectiveness of the bio-remediation process. Quarterly groundwater samples collected after ORC application indicated that benzene-toluene-ethylbenzene-xylenes (BTEX) and TVPH concentrations were reduced significantly for about a third the cost of competing technologies. Without partial reapplication, which was not warranted by regulators given that mass and risk were sufficiently reduced, the BTEX and TVPH concentrations remained at the same approximate level of reduction.