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S E C 0 R -
<br /> 2003 Feasibility Test Summary Report
<br /> September 18, 2003
<br /> 1 Page 7
<br /> Wells within or near the treatment area (MW-1, MW-2, MW-9, MW-9A, MW-9S, MW-10) were monitored
<br /> for parameters including dissolved oxygen (DO) concentrations, ferrous iron concentrations, pH, and
<br /> oxidation-reduction potential (ORP). In addition, groundwater samples were collected and analyzed for
<br /> TPHg, BTEX, and MtBE. Data sheets for the OS testing during this reporting period are presented in
<br /> Appendix I. Certified laboratory analytical results and chain-of-custody documents for groundwater
<br />' samples collected during the test are presented in Appendix J. Groundwater analytical and monitoring
<br /> results are presented in Tables 6 and 7, respectively. Plots of TPHg and benzene concentrations versus
<br /> time in wells within the treatment area are presented in Figures 5 through 10.
<br />' 3.3.2 Ozone Sparge Test Results
<br /> According to Ms. Amy Stanton of KVA, in a telephone conversation with Mr. David Evans of SECOR on
<br />' October 17, 2002, the C-SpargerTm ozone generator is capable of generating approximately 0.004
<br /> pounds of ozone per hour (lbs 03/hr) at the point of injection. Based on this value and the operational
<br /> time of the OS system, the OS system injected an estimated 15 pounds of ozone into the subsurface.
<br /> Assuming, conservatively, that one pound of hydrocarbons is degraded by every 7 pounds of ozone
<br /> tinjected, an estimated 2.2 pounds of hydrocarbons were removed.
<br /> 3.3.3 Ozone Sparge Test Conclusions
<br /> Dissolved hydrocarbon concentrations in monitoring wells MW-1, MW-2, and MW-10 generally declined
<br /> from the beginning of ozone sparge testing through its conclusion. However, the overall effectiveness of
<br /> lie OS testing appeared negligible.
<br /> 4.0 REFERENCES
<br /> Bouwer, H. 1989. The Bouwer and Rice Slug Test—An Update. Ground Water, 27(3) pp. 304-309.
<br /> Bouwer, H. and Rice, R.C. 1976. A Slug Test for Determining Hydraulic Conductivity of Confined and
<br /> Unconfined Aquifers with Completely or Partially Penetrating Wells. Water Resources Research 12(3)
<br /> pp. 423-428.
<br />' Cooper, H.H. Jr. and Jacob, C.E. 1946. A Generalized Graphical Method for Evaluating Formation
<br /> Constants and Summarizing Well-Field History, Transactions, American Geophysical Union, v. 27, pp.
<br /> 526-534.
<br />' Freeze, R.A. and Cherry, J.A. 1979. Groundwater, Prentice-Hall Inc. pp. 29-30.
<br /> Gorelick, S.M., Freeze, R.A., Donohue, D., and Keely, J.F. 1993. Groundwater Contamination —Optimal
<br />' Capture and Containment. Lewis Publishers. Pp. 101-134.
<br /> Hargis, D.R. 1979. Analysis of Factors Affecting Water-Level Recovery Data, PhD Thesis, University of
<br /> Arizona, Tucson, Arizona,
<br /> Javandel, I. And Tsang, C.F. 1986. Capture Zone Type Curves: A Tool for Aquifer Clean-up, Ground
<br /> Water, v.24, pp. 616-625.
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